Feature Requests item #1876675, was opened at 2008-01-21 19:49
Message generated for change (Settings changed) made by aherraez
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Category: New IO Format
Group: None
>Status: Closed
Priority: 5
Private: No
Submitted By: Angel Herraez (aherraez)
Assigned to: Nobody/Anonymous (nobody)
Summary: GROMACS gro input

Initial Comment:
I would like to have Jmol read GROMACS output file format, .gro

Informal description:
(http://en.wikipedia.org/wiki/Chemical_file_format#GROMACS_format)
The GROMACS file format family was created for use with the molecular 
simulation software package GROMACS. It closely resembles the PDB format but 
was designed for storing output from molecular dynamics simulations, so it 
allows for additional numerical precision and optionally retains information 
about particle velocity as well as position at a given point in the simulation 
trajectory. It does not allow for the storage of connectivity information, 
which in GROMACS is obtained from separate molecule and system topology files. 
The typical file extension for a GROMACS file is .gro.

Official description:
http://www.gromacs.org/documentation/reference/online/gro.html

I am attaching some example files taken from the examplees in GROMACS 
installation (a peptide, a box of water molecules, a box of urea in water) and, 
for reference, the equivalent pdb files obtained using the Gromacs converter 
program, "editconf".


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Comment By: Bob Hanson (hansonr)
Date: 2009-07-08 19:15

Message:
also, force vectors included as vibrations.

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Comment By: Bob Hanson (hansonr)
Date: 2009-07-08 19:15

Message:
GROMACS reader added to Jmol 11.7.47. Coordinates assumed in nanometers;
read as PDB file, with secondary structure assigned automatically and
elements inferred from atom names. UREA and SOL included in "solvent" set.

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Comment By: Nicolas (nicove)
Date: 2008-10-15 20:38

Message:
I have uploaded an example of files produced by the Gromacs core used by
Folding At Home :
http://test04145.mutu.sivit.org/p2492.zip

Do you think something can be read by Jmol among all the files ?

Zip contents :
* current.xyz, current.xyz_tmp : folding at home xyz files (currently read
by Jmol)
* wudata_01.bed : contents ? binary format
* wudata_01.bxv : contents ? text format
* wudata_01.chk : contents ? binary format
* wudata_01.dat : contents ? binary format
* wudata_01.eng : contents ? text format
* wudata_01.log : log. text format.
http://www.gromacs.org/documentation/reference/online/log.html
* wudata_01.xtc : trajectory. binary format (xdr).
http://www.gromacs.org/documentation/reference/online/xtc.html
* wudata_01.xyz : contents ? binary format
* wudata_01CP.arc : contents ? binary format
* wuinfo_01.dat : contents ? binary format


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Comment By: Angel Herraez (aherraez)
Date: 2008-02-15 14:32

Message:
Logged In: YES 
user_id=1065324
Originator: YES

Sorry, I have no trustable files in this format and I don't work with it,
so cannot provide sensible suggestions. What I was using is a box full of
water molecules.
Nico should have proteins.

I tried some example gro files by converting them to pdb. The atom IDs
seem to be identical in both.

As far as I have understood, there seems to be no support for chain IDs in
gro format.


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Comment By: Nobody/Anonymous (nobody)
Date: 2008-02-15 13:55

Message:
Logged In: NO 

I'm waiting for response to my questions in order to move forward with
this. 

Bob Hanson


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Comment By: Bob Hanson (hansonr)
Date: 2008-02-02 06:11

Message:
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Originator: NO

Shouldn't be a problem. May I implement the trajectory as a vibration
vector?

Q: What is the following all about:

box vectors (free format, space separated reals), values: v1(x) v2(y)
v3(z) v1(y) v1(z) v2(x) v2(z) v3(x) v3(y), the last 6 values may be omitted
(they will be set to zero). Gromacs only supports boxes with
v1(y)=v1(z)=v2(z)=0.


Q: How should Jmol infer an atom type (chemical element) from the above
information? Please supply some examples with two-character element symbols
such as Fe, Li, or Cl. 

Q: Is there something that Jmol could use to identify this as a protein?
If so, then we could create helices and such.

Q: Please provide a protein example that involves multiple chains.

Q: Please provide a protein example that involves a trajectory.



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Comment By: Nicolas (nicove)
Date: 2008-01-21 21:25

Message:
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Originator: NO

I would also be interested in Jmol being able to read such files.

GROMACS is one of the molecular dynamic simulations program used by
fold...@home.
That would be a nice enhancement for http://www.jmol.org/fah , especially
if the simulation trajectory can be retrieved as a multiframe model.

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