Thanks for visiting the 3DNA website. With the support from a dedicated NIH grant, I’ve been able to set up a domain name for 3DNA (
x3dna.org) to host the homepage (http://home.x3dna.org) and the forum (http://forum.x3dna.org). What to know more about 3DNA? Browse around, and ask questions — I greatly appreciate all user feedback.
Listed below are news items related to 3DNA’s further development.
- 2020-04—24 — DSSR v1.9.10-2020apr23 released. Added the
nt_typefield (with values ‘DNA’, ‘RNA’, or ‘unknown’) to the
ntsarray of JSON output, plus many code refactoring and feature revisions on DSSR-PyMOL schematics.
- 2020-02—06 — DSSR v1.9.9-2020feb06 released. Added the
--nt-mappingoption so users can specify how modified nucleotides are mapped to their canonical counterparts. Please refer to the thread modified nucleotides incorrect initiated by
tctcabon the 3DNA Forum. This update also contains many refinements at the DSSR-PyMOL interface for producing the characteristic block schematics. See http://skmatic.x3dna.org.
- 2019-10—16 — DSSR v1.9.8-2019oct16 released. Added the
--g4-onzoption for ONZ classifications of G-tetrads in intramolecular G-quadruplexes, plus minor code refinements.
- 2019-10—01 — DSSR v1.9.7-2019oct01 released. Fixed a bug in the identification of junction loops in special cases (as in PDB entry: 4wsm) — thanks to
- 2019-09-30 — SNAP v1.0.6-2019sep30 released. Added the
--methyl-Coption dedicated to the characterization of interactions between DNA 5-methyl cytosine (5CM) and amino acids in DNA-protein complexes.
- 2019-09-16 — DSSR v1.9.6-2019sep16 and SNAP v1.0.5-2019sep16 released. Documented variations of the common
--get-hbondoption between DSSR and SNAP, and its connection with
--json. Check the blogpost H-bonds reported by DSSR and SNAP for details.
- 2019-09-09 — 3DNA v2.4.4-2019sep09 released. Fixed a bug in reported base-stacking areas in special cases.
- 2019-08-26 — SNAP v1.0.4-2019aug26 released. Added the
--jsonoption for easy parsing of SNAP output; Expanded base-pair/amino-acid interactions to include all base pairs listed in the helices section; plus miscellaneous code refactoring and refinements.
- 2019-08-03 — SNAP v1.0.3-2019aug03 released. Added a list of modified nucleotides (such as 5CM) to the main output as in DSSR; Fixed a bug in rare cases, plus miscellaneous code refinements.
- 2019-08-01 — DSSR v1.9.5-2019aug01 released. Checked the compatibility of the
--symmoption with an NMR-ensemble-like input file where only the first model is handled; enhanced features on the analysis and output of G-quadruplexes; revised identification of duplex-G4 junctions (e.g., in
- 2019-07-08 — DSSR v1.9.4-2019jul08 released. Revised criteria for Watston-Crick pairs and improved identification of loops in rare cases; Updated the DSSR User Manual, which is now at 108 pages; Miscellaneous code refinements.
- 2019-05-25 — DSSR v1.9.3-2019may25 released. Refined the code for command-line options; Added
--block-option) as an alternative for
- 2019-05-06 — DSSR v1.9.2-2019may06 released. Revised the algorithm for the alignment of G-tetrads along a G-helix. Now the left-handed G-quadruplex 6fq2 has a Twist angle of
-25.8degrees; Plus other minor code refinements.
- 2019-04-06 — DSSR v1.9.1-2019apr06 released. Revised the
--analyze-cehsoption so that for non-WC structures it gives consistent results with the
cehsprogram in 3DNA v2.4; added the output of a set of six “Simple helical parameters based on consecutive C1’-C1’ vectors” with the
- 2019-04-06 — 3DNA v2.4.3-2019apr06 released. Revised the
cehsprogram for characterizing non-WC pairs.
- 2019-03-28 — SNAP v1.0.2-2019mar28 released. Revised the algorithm for the identification of statcking interactions between planar side-chains of amino acids with bases of DNA/RNA.
- 2019-03-26 — DSSR v1.9.0-2019mar26 released. Added the
--analyzeoption to output a list of key structural parameters as those from the 3DNA v2.x ‘analyze’ program. This option can also be specified as
--3dna-v2, and it contains variations to fit other potential needs. This DSSR feature aims as a replacement of the ‘analyze’ program in 3DNA v2.x.
- 2019-03-09 — DSSR v1.8.9-2019mar09 released. Revised algorithms for the identification of modified nucleotides, multiplets, and loops, in edge cases; expanded the definition of
~rHoogsteenpairs (e.g., G2—G12 in PDB entry
- 2019-02-26 — 3DNA v2.4.2-2019feb26 released. Simplified
get_3dna_homedir()to ensure that the X3DNA environment variable must be set; Revised
residue_ident()to account for special base identification.
- 2019-02-18 — DSSR v1.8.8-2019feb18 released. Relaxed criteria for reverse Hoogsteen (rHoogsteen) pairs; revised the algorithm for base identification in special cases.
- 2019-02-11 — 3DNA v2.4.1-2019feb11. Added option
fiberprogram; revised definition of reference frames for ‘simple’ step parameters in cases where the starting base-pair points downwards; polished the command-line help document available via the
-hoption; fixed a few inconsistency issues reported by
edeveaudon the 3DNA Forum.
- 2019-02-11 — SNAP v1.0.1 and DSSR v1.8.7 released. Refined code and fixed a couple of bugs in rare occasions.
- 2019-02-03 — SNAP v1.0.0 and DSSR v1.8.6 released. Refined the algorithm for H-bonds, plus documentation improvements and code refactoring. In addition to a common codebase, now SNAP and DSSR share the same interface. SNAP is mature and robust enough for version 1.0.
- 2018-20-18 — 3DNA v2.4.0-2018dec18 released. (1) Renamed
blocview, and revised its interface of command-line options for consistency with other sub-commands. (2) Revised names of atoms and residues in fiber models. For example, for str#2, the
BRatom is now in the modified nucleotide
5BUfor 5-bromouridine. (3) Simplified the note of ‘simple’ parameters in the output of the
analyzeprogram. (4) Fixed a bug with the
analyze -toption (for torsion angles) that shows up in rare cases, as in PDB id ‘102d’ with the ligand TNT.
- 2018-11-29 — DSSR v1.8.5-2018nov29 released. Fixed the bug of not escaping backslash and double quote in DSSR JSON output.
- 2018-11-12 — DSSR v1.8.4-2018nov12 released. (1) Further refinements of the G-tetrad reference frame, leading to a slightly revised twist angle. (2) Updated examples in the command-line help text. (3) A few other minor revisions.
- 2018-11-06 — 3DNA v2.3.4-2018nov06 released: revised
std_baseso that C1’ atom is no longer required with the
-fitoption; added Atomic_3MA.pdb so
mutate_basesnow works on mutations to 3-methyladenine; plus minor code refinements.
- 2018-10-29 — DSSR v1.8.3-2018oct29 released. (1) Replaced raw C1’ atomic coordinates with least-squares-fitted ones in the definition of G-tetrad reference frames. This switch ameliorates experimental uncertainty of C1’ atomic coordinates and is in line with the usage of the origins of G reference frames. As a result, helical parameters (Twist, Rise etc.) are slightly different from previously reported values. (2) Add a descriptive note for G4 stems that incorporates common names (including chair, basket, hybrid) and strand directionality, as in
note=basket(2+2)for PDB id 2kf8. (3) Introduced a squared G-tetrad block of size 11.6 Å for visualization. (4) Added the
--pair-onlyoption to output just base-pairing info, which is 10 times faster than a default DSSR run. (5) Tightened the criteria of G-U Wobble pair. Now the U2586-G2592 pair in PDB id 1s72 is named ~Wobble. The pair has a Shear in the opposite direction of a normal Wobble pair, with two completely different H-bonds:
- 2018-10-20 — DSSR v1.8.2-2018oct20 released, with detection of V-loops in G-quadruplexes, plus miscellaneous improvements.
- 2018-10-09 — DSSR v1.8.1-2018oct09 released: Further refinements and expansions on the characterization of G-quadruplexes. (1) Added support of a consistent topological nomenclature for canonical G4 structures; (2) revised the algorithm for identifying G4 loops to allow for 0-nt propeller loop as in PDB entry 2m53; (3) recovered the missing G6+G10 pair in a distorted G-tetrad in PDB entry 148d; (4) implemented full JSON output of G4 structural features. DSSR is now full-fledged for the analysis and annotation of G-quadruplexes.
- 2018-09-18 — DSSR v1.8.0-2018sep18 released: Significantly improved the characterization of G-quadruplexes, (1) revised the algorithm for the calculation of G-tetrad step parameters (twist/rise); (2) new features for the assignment of groove widths (medium, narrow, or wide), classification of stacking interactions based on the two faces of G-tetrads, and categorization of higher-order associations (coaxial stacking). Other refinements related to the identification of base-pairs and multiplets.
- 2018-09-06 — DSSR v1.7.9-2018sep06 released: sped up further the analysis of NMR ensembles or MD trajectories; revised algorithms for identifying base pairs and multiplets in special cases; improved the mmCIF parser; plus minor code/manual refinements.
- 2018-09-06 — SNAP beta-r16-2018sep06 released: added the
--citationoption, plus numerous code refinements along with DSSR.
- 2018-09-06 — 3DNA v2.3.3-2018sept06 released: revised the
blocviewscript to output a diagnostic message when
molscriptcannot be located; added the 5MC atomic model as a copy of 5CM for 5-methylcytosine.
- 2018-09-01 — DSSR v1.7.8-2018sep01 released: classified G-tetrads by different types of non-planarity; sped up analyses of large ensembles (
--nmr) as the trajectories from MD simulations; introduced the “Linker” G+A base-pair name/type; revised the algorithm for H-bonding identification, plus numerous other minor code refactoring and refinements.
- 2018-04-20 — DSSR v1.7.7-2018apr20 released: revised detection of multiplets in edge cases; miscellaneous minor refinements.
- 2018-03-22 — DSSR v1.7.6-2018mar22 released: significantly refactored code for running multiple instances of DSSR in parallel; introduced the
--auxfile=nooption to bypass the generation of the auxiliary files; added three FAQ entries and a section on DSSR integrations to the manual.
- 2018-03-19 — DSSR v1.7.5-2018mar19 released: revised code associated with the
--blocviewoption for generating cartoon-block schematic images using PyMOL, in the most extended view; minor but fixes and code improvements.
- 2018-02-15 — SNAP beta-r15-2018feb15 released: added a new section that lists higher-order stacking interactions at the interface, consisting of 3+ nucleobases and planar side-chains of amino acids.
- 2018-01-30 — DSSR v1.7.4-2018jan30 released: revised the algorithm for H-bond detection, plus other minor code/manual improvements.
- 2018-01-05 — SNAP beta-r14-2018jan05 released: added the
--nmroption to auto-process an ensemble of structures; classified H-bonds into six categories: phosphate/sugar/base moieties for nucleotides vs backbone/sidechain for amino acids, including salt bridge.
- 2017-12-31 — SNAP beta-r13-2017dec31 released: simplified output of H-bonds into mutually exclusive sections (phosphate group, sugar, or base with amino acid); added option
--auxfilefor producing additional auxiliary files (now the default is only the main output file); miscellaneous bug fixed and code refinements.
- 2017-12-26 — Revised DSSR, SNAP, and 3DNA v2.3 source code to avoid warning messages with GCC v7; DSSR: revised the JSON output of model/chain keys for consistency; incorporated abasic sites into analysis by default; SNAP: added a summary section of nucleotides with interacting amino acids; 3DNA v2.3: revised help message; added notes on PyMOL rendering of
- 2017-12-11 — SNAP beta-r11-2017dec11 released: revised output wording/formatting; added a list of additional files for pairwise H-bonding, base-amino acid pairing/stacking interactions; plus numerous code refinements.
- 2017-11-20 — DSSR v1.7.2-2017nov20 released: fixed a bug with abasic sites (as in PDB entry 4ifd, with
--abasic), and a bug in the listing of modified nucleotides (as in PDB entry 2c4z in its biological assembly, with
--symm); a variety of minor enhancements of source code and the documentation.
- 2017-11-01 — DSSR v1.7.1-2017nov01 released: fixed a bug in the analysis of G4-quadruplexes in rare cases; revised the characterization of i-motifs; checked this release on all nucleic-acid-containing structures in the PDB.
- 2017-10-19 — DSSR v1.7.0-2017oct19 released: added a module to automatically identify and fully characterize G-quadruplexes, plus numerous other internal code refinements.
- 2017-08-09 — DSSR v1.6.9-2017aug09 released: refined algorithms for identifying H-bonds and base pairs for boundary cases, plus miscellaneous code factoring and revisions.
- 2017-06-24 — 3DNA v2.3.1-2017jun24 released: added the
--mmcif) option to the 3DNA
rebuild/fiberprograms to output generated structures in the standard PDBx/mmCIF format. This feature is especially useful for large structures which are out of the limit of the classic PDB format. The
-xmloption for PDBML format output has been removed; its intended functionality is superseded by mmCIF. Thanks to Luke Czapla for prompting me to add this feature.
- 2017-04-10 — SNAP beta-r10-2017apr10 released: documented the
--type=stringwhere string can be “base” (the default), “backbone”, “either”, or “both”. The “base” argument reports protein interactions with only DNA/RNA base atoms, “backbone” with only DNA/RNA backbone atoms, “either” with base or backbone atoms, and “both” with base plus backbone atoms.
- 2017-03-28 — DSSR v1.6.8-2017mar28 released: fixed a bug in loop identification in edge cases (as in
4fe5); expanded standard bases to include A5 and A3 etc; fixed the 1-unit shift bug in the concatenated backbone suite string; fixed a bug in chain-specific DBN (as in
5pky); revised base-pair criteria to include C.U4—D.U4 pair in
1zh5; extended criteria for type=X A-minor-like motifs (U49 to U20—A76 in
4fe5); checked for output of non-stacked bases independently of stacked ones (as in
4rts); miscellaneous code/manual refinements.
- 2017-03-13 — DSSR v1.6.7-2017mar14 released: fixed a bug in derived dot-bracket notation (DBN) with pseudoknots in special cases; revised
--jsonto work with
--get-hbondsfor a full list of all H-bonds (DSSR and SNAP); changed type=O to type=X for eXtended A-minor motifs to avoid confusion with the previously documented type 0; lowered the default angle for splayed-apart dinucleotides from 100 degrees to 85; miscellaneous code/documentation refinements.
- 2017-02-20 — DSSR v1.6.6-2017feb20 released: extended A-minor motifs to include a miscellaneous type other than I and II; added groove widths to
helices/@stems@ and sequential number to
ntsof the JSON output; updated the user manual.
- 2017-02-08 — 3DNA v2.3-2017feb08 released: fixed a bug in
find_pairoutput when the residue serial number is of 5-digit — thanks to Ashay for drawing this issue to my attention.
- 2017-01-22 — DSSR v1.6.5-2017jan22 released: revised detection of pairs and helices/stems in rare cases; miscellaneous minor refinements.
- 2016-12-14 — 3DNA v2.3-2016dec14 released: revised
find_pairto work properly for circular DNA double helices (such as 4nnu) — thanks to Zukang Feng (RCSB PDB) for drawing this issue to my attention. Note that DSSR does not have such deficiency and it works for circular DNA.
- 2016-11-19 — DSSR v1.6.4-2016nov19 released: refined detection of base multiplets; added the characterization of terminal bases of helices/stems in the ‘Summary’ section; revised Jmol-DSSR web interface.
- 2016-11-16 — 3DNA v2.3-2016nov16 released: added the
--paulingoption to the
fiberprogram for easy generation of DNA/RNA triplex models based on Pauling and Corey, revised
fiberto run consistently in Windows as in Linux and Mac OS X, removed the ditrbuted tarball for Cygwin since the Msys2 version runs in native Windows as well as in MinGW/MSYS and Cygwin.
- 2016-10-19 — DSSR v1.6.3-2016oct19 released: added a new section of splayed-apart dinucleotides and larger units; plus miscellaneous code refinements and minor bug fixes.
- 2016-09-28 — SNAP beta-r09-2016sept28 released: fixed a bug with the
- 2016-09-19 — DSSR v1.6.2-2016sept19 released: refined the algorithm for identifying kink-turns (K-turns), among many other internal improvements.
- 2016-09-06 — 3DNA v2.3-v2.3-2016sept06 released: made the C source code freely available; added reference to the A/B index parameter in the main output file.
- 2016-08-22 — DSSR v1.6.1-2016aug22 released: added the identification and characterization of i-motifs (e.g., 1a83 and 2n89); refined algorithms for the identification of H-bonds and helices; miscellaneous code refactoring.
- 2016-08-06 — DSSR v1.6.0-2016aug06 released: added the
--pair-listoption to allow for user customizations of base pairs to be analyzed; added an analysis of the global curvature for each nucleic acid chain; plus various code refinements.
- 2016-07-22 — DSSR v1.5.9-2016jul22 released: further refinements of the algorithm for H-bonding detection.
- 2016-07-09 — DSSR v1.5.8-2016jul09 released: added a ‘summary’ line for each loop, plus miscellaneous code refinements.
- 2016-06-16 — DSSR v1.5.7-2016jun16 released: refined the algorithm for H-bonding detection in corner cases (such as G-tetrads with poor geometry).
- 2016-06-09 — DSSR v1.5.6-2016jun09 released: revised the summary line of DNA/RNA chains when multiple models are involved; consolidated/extended cartoob-block related functionality; internal code refinements and minor bug fixes.
- 2016-06-02 — SNAP beta-r08-2016jun02 released: added the
--t-shape) option to fix issues reported in the Supplemental Table S1 of the Wilson et al. paper Topology of RNA–protein nucleobase–amino acid π–π interactions and comparison to analogous DNA–protein π–π contacts. Specifically, the authors said:
Furthermore, although the recently released beta-r06-2015oct23 version of 3DNA-SNAP (Lu and Olson 2008) is able to distinguish between such errors, and accurately detects stacking interactions between nucleobases and amino acids, it unfortunately is currently unable to identify T-shaped interactions (see, for example, Supplemental Table S1).
- 2016-05-25 — DSSR v1.5.5-2016may25 released: added the
--viewoption (and related variants) to reset a structure via the principle moment of inertia, as in
rotate_molof 3DNA. The output orientation is in the most extended form, vertically; option
--cartoon-block-view) is also accepted to mimic the 3DNA
blocviewscript; simplified the command-line help/examble message, and revised the user manual accordingly.
- 2016-05-21 — SNAP beta-r07-2016may21 released: fixed the Segmentation fault bug (due to undefined reference frames for certain amino acids with missing side-chain atoms); miscellaneous internal code refinements.
- 2016-05-16 — DSSR v1.5.4-2016may16 released: significantly refined and extended the
--frameoption to reorient a structure based on a selected reference frame, including the middle frame of two base-pair frames, as in
frame_molof 3DNA; added output of the suite string in ‘dssr-torsions.txt’; minor bug fixed and refinements; updated user manual.
- 2016-04-11 — DSSR v1.5.3-2016apr11 released: derived a set of virtual torsion angles using the phosphorus atoms and base origins (see output file ‘dssr-torsions.txt’). This set of P-base virtual torsions was first implemented in
analyze -torsionof 3DNA v2.1, released in early 2012. See my blogpost titled Pseudo-torsions to simplify the representation of DNA/RNA backbone conformation (dated 2012-04-22) for details. Moreover, functions related to the
--block-coloroption have been refined.
- 2016-04-01 — 3DNA v2.3-v2.3-2016apr02 released: added the
--abioption (A/B index) to the 3DNA
analyzeprogram to follow the transition between A- and B-form DNA. This work is in collaboration with Dr. Steve Harvey.
- 2016-04-01 — DSSR v1.5.2-2016apr02 released: added the
--block-coloroption to facilitate flexible color customizations of blocks/edges (e.g. minor groove); expanded the definition of junction loops to include the special case of a kissing loop motif mediated by an isolated canonical pair (e.g., 1ehz); various minor internal refinements.
- 2016-03-11 — DSSR v1.5.1-2016mar11 released: miscellaneous code refinements and function enhancements.
- 2016-02-12 — DSSR v1.5.0-2016feb12 released: removed the obsolete
--jmoloption since the DSSR-Jmol integration is now better served via JSON; added more styles in the cartoon-block representation.
- 2016-01-25 — DSSR v1.4.9-2016jan25 released: fixed inconsistency in the dot-bracket-notation (dbn) output section regarding chain names with more than 1-char (as for 1vy6, in
.cifformat) — thanks to Eugene for reporting the bug; refined
.r3doutput of base blocks for PyMOL rendering, following feedback from Thomas Holder.
- 2016-01-20 — 3DNA v2.3-2016jan20 released: refined the code and section note of the ‘simple’ base-pair and step parameters. This functionality is no longer marked as ‘experimental’, but regarded as an integral component of 3DNA v2.3. These ‘simple’ parameters are more ‘intuitive’, useful for describing structures with non-Waton-Crick pairs.
- 2016-01-16 — DSSR v1.4.8-2016jan16 released: refined the definition of extended base-pair names (”~Wobble”, “~Hoogsteen”, “~rHoogsteen”, and “~Shear”); fixed a bug in the identification of G quartets in rare cases.
- 2016-01-06 — DSSR v1.4.7-2016jan06 released: extended definition of base-pair names, with “~Wobble”, “~Hoogsteen”, “~rHoogsteen”, and “~Shear” for corresponding pairs with similar geometry but sequences other than G–U, A+U, A–U, G–A, respectively.
- 2016-01-01 — 3DNA v2.3-2016jan01 released: a new experimental section of ‘simple’ base-pair and step parameters is now provided by default, useful for a more ‘intuitive’ description of structures with non-Waton-Crick pairs; various other refinements.
- 2015-12-16 — DSSR v1.4.6-2015dec16 released: refined detection of H-bonds, base-pairs, multiplets, and helices for boundary cases.
- 2015-11-23 — DSSR v1.4.5-2015nov23 released: added the
--nar-paperoption for rigorously reproducing the results reported in the 2015 DSSR Nucleic Acids Research paper; updated the User Manual; miscellaneous code refinements.
- 2015-11-18 — DSSR v1.4.4-2015nov18 released: refined detection of base-pairs and multiplets in boundary cases; made the output of base-capping interactions by default (i.e., the
--moreoption is no longer needed to be specified).
- 2015-10-23 — SNAP beta-r06-2015oct23 released: added detection of aromatic stacking interactions between bases and amino acids. Behind the scene, there have been numerous code refinements to SNAP. It shares the same new codebase with DSSR, and both programs are always compiled and released simultaneously.
- 2015-10-23 — DSSR v1.4.3-2015oct23 released: added detection of metallo-base pairs, such as T-Hg-T (4l24) and C-Ag-C (5ay2) from the work of Kondo et al.
- 2015-10-19 — 3DNA v2.3-2015oct19 released: (1) set ‘stdout’ as the default output of
find_pairand ‘stdin’ as the default input of
analyzeto facilitate piping:
find_pair 355d.pdb | analyze. This change makes the most common use-case easier to type, and it is compatible with previous releases; (2) fix a bug in unconventional glycosidic linkage, such as C1‘–C1 in DY (3) added
-symmto handle symmetric-related units in X-ray crystal structures (e.g., 4ms9) together; (4) numerous minor refinements.
- 2015-10-19 — DSSR v1.4.2-2015oct19 released: revised code for circular DNA or RNA molecules and unconventional glycosidic linkages (such as C1‘–C1 in DY).
- 2015-10-12 — DSSR 1.4.1-2015oct12 released: checked for potential erroneous usage of option
--symmetrywith an NMR ensemble (which leads to DSSR effectively taking the models all together); revised output width of id strings.
- 2015-10-10 — DSSR v1.4.0-2015oct10 released: introduced the
--nmroption to facilitate processing of NMR ensembles or trajectories of molecular dynamics simulations; added a new section summarizing structural features per nucleotide. Up to this point, DSSR contains all the fundamental features I have had in mind!
- 2015-10-08 — DSSR v1.3.9-2015oct08 released: simplified diagnostic message, and refactored code.
- 2015-10-02 — DSSR v1.3.8-2015oct02 released: added option
--cartoon-block, plus a few minor refinements.
- 2015-10-01 — DSSR v1.3.7-2015oct01 released: added option
--symm) to take symmetry-related MODEL/ENDMDL ensemble as a whole. This option is useful for x-ray crystal structures where the asymmetric unit is ‘half’ of the biological unit (e.g., PDB id: 467d —
x3dna-dssr -i=467d.pdb1 --symm).
- 2015-09-18 — DSSR v1.3.6-2015sep18 released: revised JSON output for better DSSR-Jmol integration (thanks to Dr. Robert Hanson). Specifically, a “metadata” property is introduced to collect miscellaneous information, thus simplifying the top-level name space. Moreover, “ntParams” is renamed “nts” for consistency.
- 2015-09-09 — DSSR v1.3.5-2015sep09 released: bug fixes for edge cases in JSON output, based on tests against all nucleic acid structures in PDB; minor code refactoring. The DSSR JSON output has now reached a stable, useable state.
- 2015-09-06 — DSSR v1.3.4-2015sep06 released: fixed a bug in parsing .cif files as in PDB entry 5aj0 (thanks to Eugene for reporting the issue).
- 2015-09-03 — DSSR v1.3.3-2015sep03 released: added output of reference frames of bases and base-pairs in JSON, exposing more of DSSR’s functionality to other third-party tools (e.g., for visualization).
- 2015-09-02 — DSSR v1.3.2-2015sep02 released: introduced a new set of “simple” base-pair (bp) parameters that are more intuitive for non-canonical bps. The simple parameters, including Shear, Stretch, Buckle and Propeller, are for structural description only, not suitable for model rebuilding. The non-planarity bp parameters, Buckle and Propeller in particular, have recently received attention in the RNA structure community. This simple set of bp parameter is provided to make DSSR more readily accessible to X-ray crystallographers or cryo-EM practitioners. The new parameters complement, but not replace, the original six rigid-body bp parameters for rigorous description and exact rebuilding of nucleic acid structures.
--moreoption is specified, the new parameters are available in the main output file, taking an extra line for each bp. For
--non-pair, the inter-base angle and minimum distance between base atoms are also listed. The new additions break backward compatibility of the main output file; use the
--naroption to stay with DSSR v1.2, as reported in the NAR article. Better yet, users are strongly encouraged to switch to the JSON output format for better connection with DSSR.
- 2015-08-29 — DSSR v1.3.1-2015aug29 released: revised tag names for the
--jsonoutput based on feedback from Dr. Wilma Olson; along the line, changed the file name ‘dssr-a2bases.pdb’ to ‘dssr-atom2bases.pdb’ to make its meaning more explicit for atom over base capping interactions.
- 2015-08-27 — DSSR v1.3.0-2015aug27 released: added option
--jsonto collect all DSSR-derived structural features in the standard JSON data exchange format. This single JSON file makes DSSR results easily parsable, allowing for its seamless integration with other RNA bioinformatics tools. Plus various other minor refinements.
- 2015-07-25 — DSSR v1.2.9-2015jul25 released: added a new section with details for Reproducing results published in the DSSR-NAR paper to the 3DNA Forum, and documented several additional auxiliary options in the User Manual.
- 2015-06-15 — DSSR v1.2.8-2015jun15 released: added a new section titled “Additional options” to the User Manual; refined the algorithm for hydration identification.
- 2015-06-09 — 3DNA v2.2-2015jun09 released: refined parser for input parameter files to the
rebuildprogram; DSSR v1.2.7-2015jun09 released: documented two related options:
--prefixto customize the prefix of DSSR auxiliary files, and
--cleanupto remove those files.
- 2015-05-03 — SNAP beta-r05-2015may03 released: added option
--get-hbondto output a list of H-bonds between protein and nucleic acid; numerous internal code refinements.
- 2015-04-10 — 3DNA v2.2-2015apr10 released: This is the first v2.2 release of 3DNA. The
-c1option is added to the ‘analyze’ program to calculate six local base-pair step parameters based on consecutive
C1'--C1'vectors. The numerical values of this new set of parameters are sensible even for dinucleotide steps involving non-Watson-Crick (such as Hoogsteen) base pairs. This novel feature should help clarify the long-standing issue of “weird” step parameters (e.g., twist/rise) involving non-WC pairs, which has become increasing frequent even in DNA structures. Also in this release, the Ruby script
x3dna_ensemble analyzeand the
rebuildprogram are refined, based on user feedback.
- 2015-03-28 — DSSR v1.2.6-2015mar28 released: revised the interpretation of DSSR to “Dissecting the Spatial Structure of RNA”; added a new option
--loop-isolated-pairto exclude isolated canonical pairs in delineating loops; updated the user manual (now 60 pages).
- 2015-03-19 — DSSR v1.2.5-2015mar19 released: revised the helix/stem detection algorithm for circular DNA/RNA structures.
- 2015-03-11 — 3DNA v2.1-2015mar11 released: refined the algorithm for identifying nucleotides; updated the
- 2015-03-03 — DSSR v1.2.4-2015mar03 released: refined the algorithm for assigning dot-bracket notation (dbn) in rare cases, plus miscellaneous minor improvements.
- 2015-02-18 — DSSR v1.2.3-2015feb18 released: improved the identification of multiplets.
- 2015-02-06 — DSSR v1.2.2-2015feb06 released: refined the algorithm for assigning helices, plus several code refactoring and enhancements.
- 2015-02-01 — DSSR v1.2.1-2015feb01 released: added the functionality for the characterization of H-type pseudoknots and refined the underlying algorithms for identifying H-bonds and base pairs.
- 2015-01-01 — DSSR v1.2.0-2015jan01 released: numerous code refinements and refactoring; added classification of base-stacking interactions (option
--non-pair); introduced the helix index that an isolated canonical pair is part of; included metal coordination bonds that phosphate OP1/OP2 atoms are involved in (option
--po4); replaced option
--idstr; made option
--nestedexplicit; added a new section on base stacks.
- 2014-12-22 — 3DNA v2.1-2014dec22 released: added checking for Z-RNA (as in 1t4x); refined the PDB parser; updated the
- 2014-11-04 — DSSR v1.1.10-2014nov04 released: refined the algorithm for identifying multiplets; expanded option
--non-pairto include all non-pairing interactions; various minor improvements.
- 2014-10-22 — DSSR v1.1.9-2014oct22 released: refined H-bond identification and significantly fine-tuned base pair classification; updated the user manual.
- 2014-10-09 — DSSR v1.1.8-2014oct09 released: fixed a bug in assigning G+A pairs to Saenger type X (10); further refined algorithms for finding H-bonds and base pairs.
- 2014-09-30 — SNAP beta-r04-2014sep30 released: removed the (undocumented)
--rnaoption so that RNA-protein complexes are handled the same way as DNA-protein complexes; relaxed default settings so SNAP now runs on pure nucleic acid or protein structures in addition to their complexes; added DSSP output for the protein component in file
- 2014-09-24 — DSSR v1.1.7-2014sep24 released: added auxiliary files (where available)
dssr-hairpins.pdb; further refined the algorithm for H-bond detection; significantly improved the User Manual — by switching to LaTeX, all the hyperlinks and cross references are active, and the excerpted output listings in the manual are auto-synced with the latest DSSR release via a Ruby script.
- 2014-09-16 — SNAP beta-r03-2014sep16 released: listed base-amino acid pseudo-pairs and output an associated PDB ensemble file (
snap-pseudoPairs.pdb); significant code speed-up.
- 2014-09-09 — DSSR v1.1.6-2014sep09 released: refined algorithms for detecting H-bonding and base-stacking interactions; removed the 4-line header in .bpseq output; checked for chain breaks in pseudoknot report; various code polishing.
- 2014-08-28 — DSSR v1.1.5-2014aug28 released: added the section of atom-base stacking interactions (as in the case of the phosphate OP2 atom of G57 capping over the uracil ring of PSU55 in tRNA 1ehz); significantly sped up the
--phosphateoptions; miscellaneous code refinements.
- 2014-08-09 — DSSR v1.1.4-2014aug09 released: added the option
--nestto remove pseudo-knots (if any), leaving only nested pairs; added a new section to list modified nucleotides; numerous minor refinements.
- 2014-06-18 — DSSR v1.1.3-2014jun18 released: refined the algorithm for deriving dot-bracket notation (.dbn) in RNA structures with higher-order pseudo knots (thanks to Jan Hajic); added secondary structure output in .bpseq format to parallel .ct and .dbn; miscellaneous code improvements.
- 2014-05-31 — SNAP beta-r02-2014may31 released: added detailed listing of H-bonding interactions between a component of nucleotide (base/phosphate/sugar) and an amino acid.
- 2014-05-23 — 3DNA v2.1-2014may23 released: refined the heuristic for auto-identification of nucleotides from atomic coordinates; updated
- 2014-05-05 — SNAP beta-r01-2014may05 released: initial release to kick the ball rolling. SNAP is a new 3DNA for the characterization of three-dimensional Structures of Nucleic Acid-Protein complexes. It identifies base-AA or BP-AA interactions based on a distance cutoff (default to 4.5 angstrom), calculates six parameters to uniquely quantify the spatial relationships, and sets the coordinates in the standard base or BP reference frame for easy visualization and for deriving knowledge-based potentials.
- 2014-04-19 — DSSR v1.1.2-2014apr19 released: added the option
--torsion360to output (virtual) torsional angle in the range of [0, 360] instead of the default range [-180, +180], following Cathy Lawson’s suggestion renamed
n/afor unclassified Saenger pairs, plus a few other refinements of the User Manual based on feedback from Pascal Auffinger; revised A-minor separator character from
A|G-C) based on communications with Bob Hanson.
- 2014-04-11 — DSSR v1.1.1-2014apr11 released: added the option
--get-hbondsto find and output all H-bonds in a structure; renamed file ‘dssr-torsions.dat’ to ‘dssr-torsions.txt’; update the User Manual (50 pages).
- 2014-04-09 — DSSR v1.1.0-2014apr09 released: denoted unnamed bps as
--for easy parsing (thanks to feedback from Dr. Robert Hanson); added helical radius info for helices/stems, and made the helical rise parameter explicit (thanks to Dr. Wilma Olson); changed
-parsin the output file for consistency; upgraded DSSR to v1.1.0-2014apr09 due to format changes.
- 2014-04-04 — DSSR v1.0.6-2014apr04 released: revised the algorithm for detecting kissing loops, plus other minor refinements; updated the User Manual accordingly.
- 2014-03-25 — 3DNA v2.1-2014mar25 released: refined identification of nucleotides from atomic coordinates; updated
baselist.datfile; plus a few minor revisions.
- 2014-03-24 — DSSR v1.0.5-2014mar24 released: removed the
--noteoption which has become redundant with notes in the main output file and the DSSR User Manual; shortened output from the
--helpoption by deleting the ‘Summary’ section; minor code refinements. Added the overlooked subsection “Orientation of helices/stems” and fixed a few typos and inconsistencies in the User Manual (48 pages).
- 2014-03-19 — DSSR v1.0.4-2014mar19 released: minor updates on notes in the main output file to synchronize with an significantly improved DSSR User Manual (46 pages) based on feedback from Dr. Wilma Olson.
- 2014-03-09 — DSSR v1.0.3-2014mar09 released: various improvements for consistency, and finally and most importantly, the DSSR User Manual (45 pages) is out!
- 2014-02-16 — DSSR v1.0.2-2014feb16 released: numerous minor refinements, mostly as a result of writing up the DSSR User Manual (coming soon!).
- 2014-01-31 — DSSR v1.0.1-2014jan31 released: refined the algorithm for detecting multiplets [thanks to Eugene]; fixed a bug for handling circular DNA/RNA structures [thanks to Pascal]; plus consistency improvements.
- 2014-01-25 — DSSR v1.0-2014jan25 released: the program is robust and mature enough to warrant a v1.0 release. While DSSR will be continuously refined, top priority will be on bug fixes. Wherever practical, future DSSR v1.x releases will remain backward compatible.
- 2014-01-18 — DSSR beta-r30-on-20140118 released: considerably improved annotation and consistency of the main DSSR output file with help from Dr. Wilma Olson, refined algorithms for detecting internal and junction loops, added output of secondary structures in the connect (.ct) format and the extended DBN notation to allow for multiple molecules or fragments, removed the
--break-symboloption. This will be the last beta release, and shortly we will move to DSSR v1.0! Please give it a try and let me know anything you’d like to change!
- 2014-01-06 — DSSR beta-r29-on-20140106 released: significantly improved the algorithms for detecting various loops (hairpin, bulge, internal or junction loops), covering many corner cases. List of nucleotides in loops and single-stranded fragments are now presented consistently. Plus many code refinements. DSSR is now mature and should be mostly stable, ready to quickly move over the ‘beta’ stage. This is a major revision with format changes, and all current DSSR users are encouraged to upgrade.
- 2013-12-25 — DSSR beta-r28-on-20131225 released: fixed a bug for missing
0-by-Ntype (right-side) bulge. Thanks to Eugene.
- 2013-12-03 — DSSR beta-r27-on-20131203 released: added the missing
[in detailed output of base-pair parameters for helices/stems. Thanks to Eugene.
- 2013-11-28 — DSSR beta-r26-on-20131128 released: code refinements and refactoring, plus minor bug fixes.
- 2013-11-19 — DSSR beta-r25-on-20131119 released: added option
--break-symbolto delineate chain breaks in dot-bracket notation; listed terminal single-stranded segments; plus code refinements/refactoring.
- 2013-10-30 — DSSR beta-r24-on-20131030 released: simplified the algorithm for identifying nucleotides based on coordinates, and added annotation for the Levitt pair as in tRNA.
- 2013-09-18 — DSSR beta-r23-on-20130918 released: bug fixes on U-turn identification and missing base pairs.
- 2013-09-10 — DSSR beta-r22-on-20130910 released: minor bug fixes and code refinements; release the DSSR web-interface.
- 2013-09-03 — DSSR beta-r21-on-20130903 released: fixed a rare bug (thanks to Pascal), and refined the mmCIF parsing code.
- 2013-08-30 — DSSR beta-r20-on-20130830 released: added option
--u-turnto detect UNR- or GNRA-type U-turns, plus numerous code refinements.
- 2013-08-19 — DSSR beta-r19-on-20130819 released: added option
--po4 (--phosphate)to list H-bonds involving phosphate groups; removed the segid info from nucleotide id-string by default; refined code internally and fixed minor bugs.
- 2013-08-01 — DSSR beta-r18-on-20130801 released: added support for the mmCIF format refined code for parsing the PDB format.
- 2013-07-23 — DSSR beta-r17-on-20130723 released: assigned backbone suite names (in file
"dssr-torsion.dat") following Richardson et al. RNA backbone: consensus all-angle conformers and modular string nomenclature, plus numerous code refinements and help-note revisions.
- 2013-07-10 (3DNA v2.1) — updated README files and scripts in
X3DNA/examples/to v2.1 (a long overdue!), plus various other minor revisions.
- 2013-07-09 — DSSR beta-r16-on-20130709 released: classified each dinucleotide step into A-, B- or Z-form conformation; simplified DSSR output by default. Users are advised to upgrade to this release.
- 2013-07-03 — DSSR beta-r15-on-20130703 released: added output of base morphology parameters for each identified helix/stem.
- 2013-06-26 — DSSR beta-r14-on-20130626 released: added auto-detection of ‘canonical’ kink-turns and reverse k-turns; numerous code refinements.
- 2013-06-18 — DSSR beta-r13-on-20130618 released: added segid to nucleotide id string, and refined the algorithm for finding A-minor motifs.
- 2013-06-10 — DSSR beta-r12-on-20130610 released: delineated the components of bulges, internal loops, and junctions, per user request.
- 2013-06-07 (3DNA v2.1) — fixed a bug in
rotate_mol/frame_mol(thanks to a bug report by Pascal Affinger); updated
baselist.datwith nucleic-acid-containing entries in the PDB (as of June 7, 2013).
- 2013-06-03 — DSSR beta-r11-on-20130603 released: refined the descriptive note with help of Dr. Wilma Olson; added the
--long-idstroption to explicitly delineate fields of a residue id string for easy machine parsing; added the
--puckeroption to output the sugar pucker following either Altona & Sundaralingam (1972) or Westhof & Sundaralingam (1983) — see the post Two slightly different definitions of sugar pucker.
- 2013-05-02 (3DNA v2.1) — updated
baselist.datwith nucleic-acid-containing entries in the PDB (as of May 1, 2013); revised
frame_molso that atom/residue names in the original PDB file are preserved.
- 2013-04-30 — DSSR beta-r10-on-20130430 released: added a brief descriptive note and a list of generated files to the main DSSR output; revised the command-line
--helpwith more detailed usage info; improved output format, and refined code. Now DSSR is not only self-contained, but also (at least should be) self-explanatory.
- 2013-04-21 — DSSR beta-r09-on-20130421 released: added a least-squares fitted helical axis for each identified helix/stem; classified the backbone into BI/BII conformations and the sugar into C2’/C3’-endo like (see file
dssr-torsions.dat); checked for non-pairing interactions (H-bonds or base stacking) with option
-non-pair; refined code and revised output format.
- 2013-03-26 (3DNA v2.1) — refined structure classification method to avoid false assignments of uncommon types (e.g., B-Z junction, W-form left-handed DNA) to structures with many non-canonical base pairs.
- 2013-03-23 — new release of DSSR-beta and 3DNA v2.1 update
- DSSR beta-r08-on-20130323 released: refined algorithm for detecting multiplets, revised the header section to output the numbers of DNA/RNA chains, nucleotides, waters, and metals. As of this release, it appears safe to say that DSSR-beta contains all the basic features and has been well tested. The program is ready serve as a handy tool for RNA structure analysis.
- 3DNA v2.1 has been updated with
atomlist.datto accommodate all DNA/RNA entries in the latest PDB, plus minor code refinements.
- 2013-03-22 — DSSR beta-r07-on-20130322 released: code refinements, minor bug fixes, and more extensive tests; added metal info in the output.
- 2013-03-19 — DSSR beta-r06-on-20130319 released: fixed the segmentation fault bug reported by MarcParisien for PDB entry 2a64; updated the DSSR help message.
- 2013-03-16 — DSSR beta-r05-on-20130316 released: detection of ribose zippers; revision of help message; code refactoring.
- 2013-03-14 — DSSR beta-r04-on-20130314 released, with the detection of kissing loops, and revised output format.
- 2013-03-09 — DSSR beta-r03-on-20130309 released. This version was tested against all RNA/DNA-containing entries in the PDB as of March 2013, with all identified bugs fixed and internal code refinements. DSSR should now be ready for real-world applications. The first 3DNA newsletter was sent via the Forum to its 800+ registered users, announcing the availability of this DSSR release.
- 2013-03-06 — DSSR beta-r02-on-20130306 released, mostly to fix bugs reported by the first DSSR user.
- 2013-03-03 — DSSR: Software for Defining the (Secondary) Structures of RNA released (v3.0beta r01-on-20130303). The program is the first member of what would become 3DNA v3.0, and it is currently under beta testing. Yet, DSSR should be robust and efficient enough for real-world applications. It contains neat features not available in other RNA structural analysis programs.
- 2013-02-22 — fixed a documentation bug in option
fiber -single: now either
-sworks (thanks to Leonardo); revised documentation of
find_pairand added an example for Curves+.
- 2013-01-28 — added RA, RA5, RA3 etc AMBER-related nucleotide names to file
baselist.dat; minor refinements of documentation.
- 2013-01-26 — revised the default value of
helix_breakfrom 7.5 Å to 7.8 Å so
2o8b/c/dwon’t be divided into two segments.
- 2013-01-10 — recompiled the 3DNA macosx-intel binaries on Mac OS X 10.6 (Snow Leopard) to avoid backward compatibility issue.
- 2013-01-08 — revised the algorithm for identifying nucleotides, and introduced the
-ntcoption for setting cutoff.
- 2012-12-29 — refined calculation of base overlap areas (to quantify stacking interactions).
- 2012-12-15 — added option
analyze -ringto output centers of base ring atoms (plus base normal vectors); updated
x3dna_ensemblerelated Ruby scripts with the corresponding functionality. This
-ringoption is added in response to a user request and it’s not set by default for backward compatibility.
- 2012-12-10 — updated
baselist.datto include AMBER specific nucleotides (e.g., DA5, DA3 etc); made checking of atom occupancy optional to process AMBER molecular dynamics trajectories where it is assigned
- 2012-12-09 — miscellaneous refinements:
x3dna_ensembleto parse the section “Origin (Ox, Oy, Oz) and mean normal vector (Nx, Ny, Nz) of each base-pair in the coordinate system of the given structure” from analyses of duplexes.
- added checking for atoms with zero occupancy — they are ignored from further analysis.
- revised command-line help message for
- 2012-11-26 — miscellaneous refinements and minor bug fixes:
- revised classification of chi (χ) torsion angle into syn (45° to 95°) and anti (165° to 315°) conformations.
- modified format for listing nucleotide sequential numbers so the
find_pair -c+option interfaces better with Curves+. Spaces seem to make a difference; now use
- updated command-line documentation for
fiberby adding the
- 2012-10-26 — significant functionality enhancements:
- 3DNA now checks for each base reference frame file (
Atomic*.pdb) independently: first in the current working directory, (if necessary) then the default system directory
X3DNA/config. This allows for greater flexibility in picking up customized base reference frames for analysis and rebuilding.
- Added support of 3-letter nucleotide name in base reference frame file (e.g.,
mutate_basescan now be easily applied for mutating cytosine to 5-methylcytosine.
- Added a new FAQ entry ‘How can I mutate cytosine to 5-methylcytosine’
- 3DNA now checks for each base reference frame file (
- 2012-10-16 — MODEL/ENDMDL delineated multiple-structure ensemble becomes default with the utility program
ex_str, so the
-nmroption is redundant; minor refinements of source code.
- 2012-10-06 — updated file ‘baselist.dat’ to include all canonical and modified nucleotides as of the October 6, 2012 release of PDB/NDB; added output of file ‘ref_frames.dat’ with
find_pair -soption; refined atom-name parsing to accommodate AMBER generated PDB files which has e.g.,
"OP1 "instead of the standard compliant form
- 2012-09-07 — added thread Datasets and scripts for reproducing Figure 5 of the 3DNA NAR03 paper on the 3DNA Forum.
- 2012-08-09 — implemented the option
-chain_markersfor the analysis of single-stranded DNA/RNA structures per Pascal Auffinger’s request; further code refinements.
- 2012-08-06 — added the command-line option
-chain_markersto specify chain continuation character following Pascal Auffinger’s suggestion; made P…P distances and helix radii from
analyzeoutput two decimals, parameters in files
bp_helical.parthree decimals; refined
alc2img -pdboption by changing ATOM to HETATM for atomic coordinate records.
- 2012-07-26 — refined
mutate_basesto take comma as well as space(s) to separate fields and updated the help file; added a corresponding command line option for each
misc_3dna.parsetting — e.g.,
find_pair -max_dv=2.0 355d.pdb stdout
to set maximum vertical separation for base pairs to 2.0 Å instead of the default 2.5 Å without modifying file
- 2012-07-19 — updated command-line help to v2.1; added option
frame_mol— see the example section for a use case.
- 2012-07-09 — added option
-original_bp_coordinate(can be abbreviated to
find_pairso that the identified base pairs (bp) are written in their original PDB coordinates instead of being reoriented in their bp reference frames.
- 2012-06-26 — added support for Mac OS X PPC.
- 2012-06-25 — minor refinements.
- 2012-06-22 — revised
x3dna_setupto handle the most common shells
tcsh/cshmore explicitly; made PDB chain identifier case sensitive by default, i.e., ‘A’ and ‘a’ are different chains.
- 2012-06-20 — further tidy-ups and refinements
- Refined the
x3dna_setupRuby script to take care of the
- Made the option
-pdbv3default to comply with PDB format v3.x. The Gromacs
pdb2gmxprogram is strict with PDB v3.x OP1/OP2 and C7 (thymine) atom naming, and DNA residue names DA/DC/DG/DT.
- Split the following two
analyze -torsiongenerated columns for easy parsing (thanks to Pascal Auffinger): (1) sugar-base torsion angle chi(anti/syn) from e.g. -105.9(anti) to -105.9 anti; (2) backbone BI/BII classification from e.g. 113.6(BII) to 113.6 BII.
- Added option
x3dna_ensemble reorientfor single-stranded nucleic acid structure.
--one (-n)option to
x3dna_ensemble analyzeto process only a single structure.
- Refined the
- 2012-06-06 — extended
x3dna_ensemble(for NMR ensembles or MD trajectories) to automatically process single-stranded DNA/RNA structures [option
--single (-s)] and the recently added/expanded list of torsion angles [option
--torsion (-t)]; further code refactoring.
- 2012-05-04 — added the
alc2imgto readily convert 3DNA-generated alchemy files to PDB format — along with the
-moloption, I’m hoping the Calladine-Drew style schematic representation of rectangular base-pair blocks would be more widely used in the community of DNA/RNA structures; tidied up code and documentation.
- 2012-05-02 — refined
blocviewso it now runs properly even if any third-party tool — Raster3D, PyMOL, MolScript, or ImageMagick — is not available.
- 2012-04-29 — renamed the Perl scripts (within directory
x3dna_setup.plto avoid confusion with the corresponding Ruby versions within
- 2012-04-25 — further tidy-ups and refinements
- Moved all Perl scripts from
perl_scripts/— while still available, their key functionality has now been consolidated, enhanced, and superseded by the Ruby scripts
x3dna_utils. Moreover, the recipes (under
$X3DNA/np_recipes/) reported in the 3DNA Nature Protocols (2008) paper have been updated to work with the new Ruby scripts.
x3dna_setupto output sensible settings for the X3DNA environment variable and PATH, even when SHELL is not set or unknown to the Ruby script.
analyzeto generate file
stacking.pdbetc. with single-stranded DNA/RNA structures.
- Moved all Perl scripts from
- 2012-04-21 — added the
-enumoption that enumerates all bases in a format easily adaptable to
mutate_bases; as a sample application, it facilitates methylation of cytosine bases in a structure.
- 2012-04-18 — fixed a minor bug with
analyze -torsionfor edge cases as in PNA; updated documentation for
analyzeto include the
-torsionoption, and to explicitly specify an input file name (including ‘stdin’).
- 2012-04-16 — new features and refinements
- added the new option
analyzeto readily calculate the various DNA/RNA backbone torsion angles (α, β, γ, δ, ε, ζ, and χ), pseudo-torsions (η/θ, η′/θ′ etc), and classify backbone BI/BII, base syn/anti-conformations; to extend the Zp parameter to single-stranded DNA/RNA structures. A sample run would be
analyze -torsion=6tna.txt 6tna.pdbfor the yeast phenylalanine transfer RNA (6tna), and the output file is 6tna.txt.
- extended 3DNA parser for
x3dna_ensembleto include helical axis vector and position, as well as helix radii.
- added detailed nucleotide information for each base or pair to file
6 A-T # A:...6_:[.DA]A - B:..19_:[.DT]T
- removed checking for mean twist angle when classifying dinucleotide steps so the B-steps in B-Z junction (2acj) are categorized.
- added support for converting Alchmey format to molfile v3000: either specified explicitly through command line, or implicitly when the number of atoms or bonds is over 999.
- added the new option
- 2012-03-28 — various minor corrections and refinements
- 2012-03-13 — The v2.1beta now includes a global
-pdbv3option so that
fiber/rebuildcan directly generate structures compliant with PDB format v3.x; added the
alc2imgto convert 3DNA-generated base rectangular blocks in Alchemy to the MDL molfile format, which is more widely accepted (e.g., in PyMOL).
- 2012-03-09 — The v2.1beta version was updated to make 3DNA-generated PDB files compatible with HADDock and PdbViewer.
- added option
-three_letter_ntsto allow for nucleotide names ADE/CYT/GUA/THY/URA in
- added option
-connectto include CONECT records in
- For ATOM records in 3DNA generated PDB structures, set occupancy to 1.00, tempFactor to 1.00 (not 0.00, which PdbViewer complains as unrealistic B-factor), and include element symbol
- added utility
x3dna_utils) to make
fiber/rebuild-generated PDB files comply with PDB format v3. Specifically, re-label O1P to OP1, O2P to OP2, and C5M to C7 for thymine. For DNA structures, also change nucleotide names from the one letter code A/C/G/T to two-letter DA/DC/DG/DT.
- added option
- 2012-03-05 — the two new sites x3dna.org and forum.x3dna.org formally replace the following three 3DNA-related websites previously hosted at Rutgers University.
http://rutchem.rutgers.edu/~xiangjun/3DNA— the v1.5 site which has received the most outside links, to which the
~olsonvariant is just a symbolic link.
http://3dna.rutgers.edu/— the v2.0 site
http://3dna.rutgers.edu:8080/forum— the forum site
Just a small bug report not worth going to the 3DNA forum.
SwS — a Solvation Web Service for Nulceic Acids where 3DNA plays a role.
nucleic is misspelled
Solvation Web Service is better with “web” (small w)
Thanks for that.
Hope that I will be able to show you more soon.
and looking forward to see the new help pages (now that you are working on them).
Also wanted to tell you that up to now, for my needs, 2.1 is working fine.
Spring is coming
— Pascal Auffinger · 2012-03-27 06:26 · #
Thanks for pointing out the nucleic typo — it’s been fixed. Also, I have changed Web to web so it now matches SwS.
It seems this comment should belong to Outside links where SwS and other resources are mentioned.
The DNA pdb file generated by X3DNA has only A T C G, but no terminal base, e.g. A3, A5, T3, T5, …
How to use X3DNA generate a pdb file with terminal bases?
The reason why I ask this question is because I am using X3DNA to generate initial DNA conformation for MD simulations by Gromacs.
In addition to the above question, is it possible to generate a pdb file that is fully compatible with Gromacs. Now there are some incompatible things. Such as Gromacs using DA, DT, DC, DG, rather than A, T, C, G.
— Dai Liang · 2016-01-21 01:42 · #
Hi Dai Liang,
Thanks for stopping by and making a comment.
First, it is better off to ask such questions on the 3DNA Forum where one can start a new thread with a clearly defined subject line. Here your comment is under the long “What’s new” section which is not directly related to the question asked.
Now, to briefly answer your questions:
- The DNA pdb file generated by X3DNA does not have specific designation of terminal nucleotides, such as A3, A5 etc. These are not standard terminology as far as I can tell, and they do not appear in RCSB PDB entries.
- With the
-pdbv3option of ‘rebuild’, i.e.
rebuild -pdbv3 -atomic, the 3DNA generated PDB file will have DA, DT etc for DNA structures.
- There are several packages for MD simulations, including AMBER, CHARMM, and Gromacs. I am not sure if they all adopt the same input format for PDB files. However, I believe even PDB files directly downloaded from RCSB must go through a preparation step (e.g., adding hydrogen atoms, charge neutralization etc) to be useable in AMBER.
So in your case, you need to do some extra work from 3DNA-gererated PDB files to feed into Gromacs.
Hope this helps.
— Xiangjun · 2016-01-21 09:30 · #
I would like to ask whether there is any tool available on X3DNA.org to analyze the DNA base pair type?
— Roshan · 2018-07-20 01:36 · #
Thanks for stopping by and leaving a comment. For the identification and classification of base-pair types (DNA or RNA), please check out DSSR from the 3DNA Forum.
— Xiangjun · 2018-07-20 05:29 · #