[gmx-users] trjconv write frames to separate files

2008-11-12 Thread tatsiana kirys
Hi,

i'm trying to write each frame from the bebining time=0.0 to the end
time=6000 to a separate file, but it writes only the 1frame at time 0.0:

trjconv -f 1ktz_p1_em.gro -s 1ktz_p1_em.tpr -o 1ktz_0.pdb -b 0.0 -e 6000.0
-sep

Reading frames from gro file 'GROningen MAchine for Chemical Simulation',
1148 atoms.
Reading frame   0 time0.000
Precision of 1ktz_p1_em.gro is 0.001 (nm)
Last frame  0 time0.000

i guess i should provide index.ndx of frames.ndx.
i havn't found anithing about what to write in these files and in what
format.


Tania
___
gmx-users mailing listgmx-users@gromacs.org
http://www.gromacs.org/mailman/listinfo/gmx-users
Please search the archive at http://www.gromacs.org/search before posting!
Please don't post (un)subscribe requests to the list. Use the 
www interface or send it to [EMAIL PROTECTED]
Can't post? Read http://www.gromacs.org/mailing_lists/users.php

[gmx-users] g_rms

2008-11-10 Thread Tatsiana Kirys
Hi,

i use g_rms to calculate rms, 

as reference structure (-s) i use myprotein.pdb file
and trajectory (-f) is a trajectiry  after MD MDprotein.pdb.

The thing is that myprotein.pdb  and  MDprotein.pdb have the same atoms BUT 
their order within a residue is DIFFERENT.
example:
myprotein.pdb:
ATOM  1  N   ALA E   1  18.858 -22.883  26.306  1.00  0.00  
 
ATOM  2  CA  ALA E   1  19.106 -24.277  26.027  1.00  0.00  
 
ATOM  3  C   ALA E   1  20.206 -24.458  25.006  1.00  0.00  
 
ATOM  4  O   ALA E   1  20.156 -23.801  23.972  1.00  0.00  
 
ATOM  5  CB  ALA E   1  17.865 -24.819  25.301  1.00  0.00

MDprotein.pdb:
ATOM  1  N   ALA 1  18.861  24.179  26.290  1.00  0.00
ATOM  2  CA  ALA 1  18.978  22.741  26.011  1.00  0.00
ATOM  3  CB  ALA 1  17.670  22.190  25.440  1.00  0.00
ATOM  4  C   ALA 1  20.069  22.592  24.949  1.00  0.00
ATOM  5  O   ALA 1  20.120  23.450  24.070  1.00  0.00

whether g_rms work correct in this case?

g_rms -s myprotein.pdb -f MDprotein.pdb 
___
gmx-users mailing listgmx-users@gromacs.org
http://www.gromacs.org/mailman/listinfo/gmx-users
Please search the archive at http://www.gromacs.org/search before posting!
Please don't post (un)subscribe requests to the list. Use the
www interface or send it to [EMAIL PROTECTED]
Can't post? Read http://www.gromacs.org/mailing_lists/users.php


Re: Re: [gmx-users] rmsd on homologous protein structure

2008-11-07 Thread Tatsiana Kirys
tahnk you i'll try that

___
gmx-users mailing listgmx-users@gromacs.org
http://www.gromacs.org/mailman/listinfo/gmx-users
Please search the archive at http://www.gromacs.org/search before posting!
Please don't post (un)subscribe requests to the list. Use the
www interface or send it to [EMAIL PROTECTED]
Can't post? Read http://www.gromacs.org/mailing_lists/users.php


[gmx-users] g_rms

2008-11-07 Thread Tatsiana Kirys

Hi,

i got strange results using g_rms.
Does it by default uses mass weighting for superposition? 
I wrote my own script to calculate rmsd without mass weighting and it gives 
different results then using g_rms. 
If it uses mass weighting for superposition how not not use it? i tried select 
-mw no, but it doesn't work.


namy thanks
Tania
___
gmx-users mailing listgmx-users@gromacs.org
http://www.gromacs.org/mailman/listinfo/gmx-users
Please search the archive at http://www.gromacs.org/search before posting!
Please don't post (un)subscribe requests to the list. Use the
www interface or send it to [EMAIL PROTECTED]
Can't post? Read http://www.gromacs.org/mailing_lists/users.php


[gmx-users] rmsd on homologous protein structure

2008-11-06 Thread Tatsiana Kirys
Hi,

i want to calculate rmsd on homologous protein structures that have different 
residue numbers. 
As far as i understood g_rms gives only rmsd of the same structure in different 
configurations, but it doesn't fit homologous protein structures? 

In Option -f2 can i provide a trajectory of a homologous protein structure of 
it also have to be a reserence structure trajectory (which is provided in -s)?

many many thanks
Tatsiana 
___
gmx-users mailing listgmx-users@gromacs.org
http://www.gromacs.org/mailman/listinfo/gmx-users
Please search the archive at http://www.gromacs.org/search before posting!
Please don't post (un)subscribe requests to the list. Use the
www interface or send it to [EMAIL PROTECTED]
Can't post? Read http://www.gromacs.org/mailing_lists/users.php