[gmx-users] checking gen_seed

2011-03-22 Thread Kwee Hong
Hi all,

I've accidentally deleted my mdp and .tpr  file.. :(
Is there a way I could check the gen_seed of my simulation from the .tpr or the 
output of my simulation as I need the info to simulate the same system at 
another temerature?


Thanks.

Joyce

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Re: [gmx-users] checking gen_seed

2011-03-22 Thread Kwee Hong
Alright, thx Mark.




From: Mark Abraham mark.abra...@anu.edu.au
To: Discussion list for GROMACS users gmx-users@gromacs.org
Sent: Tuesday, March 22, 2011 15:44:51
Subject: Re: [gmx-users] checking gen_seed

On 22/03/2011 6:28 PM, Kwee Hong wrote: 
Hi all,


I've accidentally deleted my mdp and .tpr  file.. :(
Is there a way I could check the gen_seed of my simulation   from the 
.tpr or the output of my simulation as I need the   info to simulate 
the 
same system at another temerature?
I don't think gen_seed is saved in the .tpr, but you can see with gmxdump.

At a different temperature it generates different velocities anyway, so I 
don't think there is value in controlling this variable.

More importantly, if you're simulating long enough to approach convergence, 
the value of gen_seed doesn't matter because the simulation has converged. 
If you're not simulating that long, then it also doesn't matter, in that 
your results won't be worth much even if you used the same gen_seed at the 
same temperature...

Mark


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[gmx-users] only one model is displayed

2011-02-11 Thread Kwee Hong
Hi,

I've used g_confrms from gromacs-4.5.1 to compare two structures with the 
following command line -

   g_confrms -f1 1OMB.pdb -f2 md.gro -o fit.pdb

fit.pdb  is supposed to be the output file which would show the 2 structures 
superimposed on  each other. But when I visualised it with vmd. I can only see 
one  structure.

Any idea what's going on? I hereby attached part of the generated fit.pdb.

All suggestions are welcomed.

Regards,
Joyce


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[gmx-users] Re: only one model is displayed

2011-02-11 Thread Kwee Hong
sorry, forgot to attached the file...





From: Kwee Hong jestan1...@yahoo.com
To: gmx-users gmx-users@gromacs.org
Sent: Friday, February 11, 2011 23:38:55
Subject: only one model is displayed


Hi,

I've used g_confrms from gromacs-4.5.1 to compare two structures with the 
following command line -

   g_confrms -f1 1OMB.pdb -f2 md.gro -o fit.pdb

fit.pdb  is supposed to be the output file which would show the 2 structures 
superimposed on  each other. But when I visualised it with vmd. I can only see 
one  structure.

Any idea what's going on? I hereby attached part of the generated fit.pdb.

All suggestions are welcomed.

Regards,
Joyce



fit.pdb
Description: Binary data
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Re: [gmx-users] doubts on g_confrms output

2011-02-11 Thread Kwee Hong
Hi Tsjerk,

Thanks for the help. I got it.
But do you have any idea how to solve this in vmd?

Regards,
Joyce





From: Tsjerk Wassenaar tsje...@gmail.com
To: Discussion list for GROMACS users gmx-users@gromacs.org
Sent: Saturday, January 22, 2011 15:53:22
Subject: Re: [gmx-users] doubts on g_confrms output


Hi Joyce,
In pymol use 'set all_states'
Cheers,
Tsjerk
On Jan 22, 2011 8:30 AM, Kwee Hong jestan1...@yahoo.com wrote:


Hi,


I was trying to do some analysis following John's GROMACS tutorial for 
solvation study of spider toxin peptide.
I'm using GROMACS-4.5.3 and my command line for g_confrms is 


g_confrms -f1 1OMB.pdb -f2 md.gro -o fit_wet.pdb


The program calculated the RMSD sucessfully and fit_wet.pdb was generated. 
Yet, 
when i tried to visualise fit_wet.pdb using VMD, the structure is obviously in 
a 
mess. And when I tried it out  with pymol, I can only visualised one model. 
Model 2 did not appear. I wonder would it be the pdb format generated by 
g_confrms is not the standard pdb format and had caused VMD and final failed 
to 
read  them?


Herein, I attached part of the pdb file generated by  fit_wet.pdb. Any insight 
is welcomed.


Thanks,
Joyce


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Re: [gmx-users] doubts on g_confrms output

2011-02-11 Thread Kwee Hong
Hi Mark,

I tried but with this error:

Fatal error:
Number of atoms in pdb frame 0 is 331 instead of 491

Joyce





From: Mark Abraham mark.abra...@anu.edu.au
To: Discussion list for GROMACS users gmx-users@gromacs.org
Sent: Saturday, February 12, 2011 0:01:39
Subject: Re: [gmx-users] doubts on g_confrms output

On 12/02/2011 2:55 AM, Kwee Hong wrote: 
Hi Tsjerk,

Thanks for the help. I got it.
But do you have any idea how to solve this in vmd?

Use trjconv -sep on the .pdb file to split it.

Mark



Regards,
Joyce





From: Tsjerk Wassenaar tsje...@gmail.com
To: Discussion list for GROMACS users gmx-users@gromacs.org
Sent: Saturday, January 22, 2011 15:53:22
Subject: Re: [gmx-users] doubts on g_confrms output


Hi Joyce,
In pymol use 'set all_states'
Cheers,
Tsjerk
On Jan 22, 2011 8:30 AM, Kwee Hong   jestan1...@yahoo.com  
 
wrote:


Hi,


I was trying to do some analysis following John's 
GROMACS tutorial for solvation study of spider 
toxin peptide.
I'm using GROMACS-4.5.3 and my command line for 
g_confrms is 


g_confrms -f1 1OMB.pdb -f2 md.gro -o fit_wet.pdb


The program calculated the RMSD sucessfully and 
fit_wet.pdb was generated. Yet, when i tried to 
visualise fit_wet.pdb using VMD, the structure is 
obviously in a mess. And when I tried it out with 
pymol, I can only visualised one model. Model 2 
did 
not appear. I wonder would it be the pdb format 
generated by g_confrms is not the standard pdb 
format and had caused VMD and final failed to 
read 
them?


Herein, I attached part of the pdb file generated 
by 
fit_wet.pdb. Any insight is welcomed.


Thanks,
Joyce


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[gmx-users] invacuo simulation

2011-01-28 Thread Kwee Hong
Hi
In John's GROMACS tutorial for solvation study of spider toxin peptide,I keep 
on getting an error message at the production stage: 



Step 12111  Warning: Pressure scaling more than 1%.

Step 12121  Warning: Pressure scaling more than 1%.

Step 12131  Warning: Pressure scaling more than 1%.

---
Program mdrun, VERSION 4.5.1
Source code file: ns.c, line: 2544

Fatal error:
One of the box vectors has become shorter than twice the cut-off length or 
box_yy-|box_zy| or box_zz has become smaller than the cut-off.
For more information and tips for troubleshooting, please check the GROMACS
website at http://www.gromacs.org/Documentation/Errors

I've tried a few approaches after reading the mailing list yet I'm still 
getting 
the same error message.

The command lined I used in this simulation is as follow:
pdb2gmx -ignh -ff gtomos43a1 -f 1OMB.pdb -o fws.pdb -p fws.top -water spce
editconf -bt cubic -f fws.pdb -o fws.pdb -d 1.0
grompp -f em.mdp -c fws.pdb -p fws.top -o em.tpr -maxwarn 5
mdrun -v -deffnm em
grompp -f md.mdp -c em.gro -p fws.top -o md.tpr -maxwarn 3
mdrun -v -deffnm md

After getting the error above round step 2300, I increased the tau_p from 0.5 
to 
1.0.

Yet I got the same error message at step  5400 though the warning on pressure 
scaling  more than 1% was gone. 

Therefore, I inceased the -d option in editconf to 1.5.

But once again, I got the same error message at step 7300 (no warning on 
pressure scaling). 

So once again, I increased the -d option in editconf to 2.5.

And I still got the same error message at step 11300.

I'm now real lost in solving this.. I hereby attach my full.mdp file, hopefully 
to get some insight here.
Any suggestions are appreciated.

Thanks.

Regards,
Joyce



md.mdp
Description: Binary data
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Re: [gmx-users] invacuo simulation

2011-01-28 Thread Kwee Hong






From: Mark Abraham mark.abra...@anu.edu.au
To: Discussion list for GROMACS users gmx-users@gromacs.org
Sent: Friday, January 28, 2011 17:51:41
Subject: Re: [gmx-users] invacuo simulation

On 28/01/2011 8:45 PM, Kwee Hong wrote: 
Hi


In John's GROMACS tutorial for solvation study of spider   toxin 
peptide,I keep on getting an error message at the   production stage: 



Step 12111  Warning: Pressure scaling more than 1%.

Step 12121  Warning: Pressure scaling more than 1%.

Step 12131  Warning: Pressure scaling more than 1%.

---
Program mdrun, VERSION 4.5.1
Source code file: ns.c, line: 2544

Fatal error:
One of the box vectors has become shorter than twice the   cut-off 
length or box_yy-|box_zy| or box_zz has become smaller   than the 
cut-off.
For more information and tips for troubleshooting, please   check the 
GROMACS
website at http://www.gromacs.org/Documentation/Errors

I've tried a few approaches after reading the mailing list yet   I'm 
still getting the same error message.

The command lined I used in this simulation is as follow:
pdb2gmx -ignh -ff gtomos43a1 -f 1OMB.pdb -o fws.pdb -p fws.top   
-water 
spce

Typo there.

Sorry for the typo


editconf -bt cubic -f fws.pdb -o fws.pdb -d 1.0
grompp -f em.mdp -c fws.pdb -p fws.top -o em.tpr -maxwarn 5
mdrun -v -deffnm em
grompp -f md.mdp -c em.gro -p fws.top -o md.tpr -maxwarn 3
mdrun -v -deffnm md

Look at those warnings. Unless you know what they are and why ignoring them 
is OK, don't use -maxwarn.

There is actually no warning but note:  

The optimal PME mesh load for parallel simulations is below 0.5  and for highly 
parallel simulations between 0.25 and 0.33, for higher performance, increase 
the 
cut-off and the PME grid spacing

I think this is not significant since I'm running the simulation on single 
workstation.



After getting the error above round step 2300, I increased the   tau_p 
from 0.5 to 1.0.

Yet I got the same error message at step  5400 though the   warning on 
pressure scaling  more than 1% was gone. 

Therefore, I inceased the -d option in editconf to 1.5.

But once again, I got the same error message at step 7300 (no   
warning 
on pressure scaling). 

So once again, I increased the -d option in editconf to 2.5.

And I still got the same error message at step 11300.

I'm now real lost in solving this.. I hereby attach my   full.mdp 
file, 
hopefully to get some insight here.
Any suggestions are appreciated.

.mdp file looks OK.

Mark



Thanks.

Regards,
Joyce






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[gmx-users] doubts on running em in vacuo

2011-01-22 Thread Kwee Hong
Hi

In John's GROMACS tutorial for solvation study of spider toxin peptide, he 
has 
included a suggested em.mdp files to set up an in vacuo minimization.
But I had some noted while conducting the grompp before em.

Analysing residue names:
There are:35Protein residues
Analysing Protein...
Number of degrees of freedom in T-Coupling group rest is 990.00
Largest charge group radii for Van der Waals: 0.238, 0.238 nm
Largest charge group radii for Coulomb:   0.238, 0.238 nm

NOTE 2 [file em_steep.mdp]:
  The sum of the two largest charge group radii (0.476006) is larger than
  rlist (1.40) - rvdw (1.00)



NOTE 3 [file em_steep.mdp]:
  The sum of the two largest charge group radii (0.476006) is larger than
  rlist (1.40) - rcoulomb (1.00)


This run will generate roughly 0 Mb of data

There were 3 notes

Back Off! I just backed up em.tpr to ./#em.tpr.1#

gcq#243: Uh-oh  Right Again (Laurie Anderson)

I've read through some of the posts in the mailing list and realised that doing 
some adjustment on the cut-off would solve this. Yet I'm not sure how to 
justify 
the adjustment.

Option A: Increase my rlist to 1.5 leaving the rest cut-off at 1.0? And set my 
rcoulomb_switch and rvdw_swithch at 0.8?
Option B: Increase my rlist to 1.6 while leaving the rest cut-off at 1.2 and 
set 
my rcoulomb_switch and rvdw_swithch at 1.0?

I'm using GROMACS-4.5.3. And I attach mt em_steep.mdp file i this email.
Suggestions are all welcomed.

Thanks,
Joyce



em_steep.mdp
Description: Binary data
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[gmx-users] doubts on g_confrms output

2011-01-21 Thread Kwee Hong
Hi,


I was trying to do some analysis following John's GROMACS tutorial for 
solvation study of spider toxin peptide.
I'm using GROMACS-4.5.3 and my command line for g_confrms is 

g_confrms -f1 1OMB.pdb -f2 md.gro -o fit_wet.pdb

The program calculated the RMSD sucessfully and fit_wet.pdb was generated. Yet, 
when i tried to visualise fit_wet.pdb using VMD, the structure is obviously in 
a 
mess. And when I tried it out with pymol, I can only visualised one model. 
Model 
2 did not appear. I wonder would it be the pdb format generated by g_confrms is 
not the standard pdb format and had caused VMD and final failed to read  them?

Herein, I attached part of the pdb file generated by  fit_wet.pdb. Any insight 
is welcomed.

Thanks,
Joyce




fit_wet.pdb
Description: Binary data
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Re: [gmx-users] pdb2gmx: segmentation fault

2011-01-13 Thread Kwee Hong
Hi Tsjerk,

Ya, it happened with other ff, too.
My command line is pdb2gmx -ignh -f Sur.pdb
i've browsed through the pdb file and it looks ok...

joyce







From: Tsjerk Wassenaar tsje...@gmail.com
To: Discussion list for GROMACS users gmx-users@gromacs.org
Sent: Thursday, January 13, 2011 15:31:35
Subject: Re: [gmx-users] pdb2gmx: segmentation fault


Hi Joyce,
Can you post the command line? Does it also happen with other force fields? Is 
there something notable about the pdb file?
Cheers,
Tsjerk
On Jan 13, 2011 7:48 AM, Kwee Hong jestan1...@yahoo.com wrote:


Hi Mark,

I tried v 4.0.7 and 4.5.1. Both experiencing the same situation.
The file is actually saved as pdb file from autodock output using pymol.

Joyce





From: Mark Abraham mark.abra...@anu.edu.au
To: Discussion list for GROMACS users gmx-users@gromacs.org
Sent: Thursday, January 13, 2011 13:43:47
Subject: Re: [gmx-users] pdb2gmx: segmentation  fault

On 01/13/11, Kwee Hong jestan1...@yahoo.com wrote:   Hi,I was trying 
to generate topolo...

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[gmx-users] Re: pdb2gmx: segmentation fault

2011-01-13 Thread Kwee Hong
Hi all,

I've uploaded my pdb file 
at http://www.birg1.bioscience.com.my/joyce/protein_dock.pdb
Maybe someone can help me to look into it and see does it has any error.

Thanks,
Joyce




From: Kwee Hong jestan1...@yahoo.com
To: gmx-users gmx-users@gromacs.org
Sent: Thursday, January 13, 2011 12:21:55
Subject: pdb2gmx: segmentation fault


Hi,


 I was trying to generate topology file of my pdb using pdb2gmx.

Select the Force Field:
 0: GROMOS96 43a1 force  field 
 1: GROMOS96 43a2 force field (improved alkane dihedrals)
 2: GROMOS96 45a3 force field (Schuler JCC 2001 22 1205)
 3: GROMOS96 53a5 force field (JCC 2004 vol 25 pag 1656) 
 4: GROMOS96 53a6 force field (JCC 2004 vol 25 pag 1656) 
 5: OPLS-AA/L all-atom force field (2001 aminoacid dihedrals)
 6: [DEPRECATED]  Gromacs force field (see manual)
 7: [DEPRECATED] Gromacs force field with hydrogens for NMR
 8: Encad all-atom force field, using scaled-down vacuum charges
 9: Encad all-atom force field, using full solvent charges
4
Opening library file /usr/share/gromacs/top/ffG53a6.rtp
Opening library file  /usr/share/gromacs/top/aminoacids.dat
Opening library file /usr/share/gromacs/top/aminoacids.dat
WARNING: masses will be determined based on residue and atom names,
 this can deviate from the real mass of the atom type
Opening library file /usr/share/gromacs/top/atommass.dat
Entries in atommass.dat: 178
WARNING: vdwradii will be determined based on residue and atom names,
 this can deviate from the real mass of the atom type
Opening library file /usr/share/gromacs/top/vdwradii.dat
Entries in vdwradii.dat: 28
Opening library file /usr/share/gromacs/top/dgsolv.dat
Entries in dgsolv.dat: 7
Opening library file /usr/share/gromacs/top/electroneg.dat
Entries  in electroneg.dat: 71
Opening library file /usr/share/gromacs/top/elements.dat
Entries in elements.dat: 218
Reading complex_SurA.pdb...
Read 3163 atoms
Opening library file /usr/share/gromacs/top/xlateat.dat
26 out of 26 lines of xlateat.dat converted succesfully
Analyzing pdb file
There are 1 chains and 0 blocks of water and 409 residues with 3163 atoms

  chain  #res #atoms
  1 'B'   409   3163  

All occupancy fields zero. This is probably not an X-Ray structure
Opening library file /usr/share/gromacs/top/ffG53a6.atp
Atomtype 1
Reading residue database... (ffG53a6)
Opening library file /usr/share/gromacs/top/ffG53a6.rtp
Using default: not generating all possible dihedrals
Using default: excluding 3 bonded neighbors
Using default: generating 1,4 H--H interactions
Using default: removing impropers on same bond as a proper
Residue 108
Sorting it all out...
Opening library file /usr/share/gromacs/top/ffG53a6.hdb
Opening library file /usr/share/gromacs/top/ffG53a6-n.tdb
Opening library file /usr/share/gromacs/top/ffG53a6-c.tdb

Back Off! I just backed up topol_SurA.top to ./#topol_SurA.top.1#
Processing chain 1 'B' (3163 atoms, 409 residues)
There are 629 donors and 614 acceptors
Segmentation fault

Yet I encountered segmentation fault which I don't understand why this happen.
All suggestion are welcomed?

Thanks.

Joyce

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Re: [gmx-users] Re: pdb2gmx: segmentation fault

2011-01-13 Thread Kwee Hong
Sorry, this should be correct link to download the file.

http://www.birg1.bioscience.utm.my/joyce/protein_dock.pdb 

Joyce


From: Mark Abraham mark.abra...@anu.edu.au
To: Discussion list for GROMACS users gmx-users@gromacs.org
Sent: Friday, January 14, 2011 11:29:45
Subject: Re: [gmx-users] Re: pdb2gmx: segmentation fault



On 01/14/11, Kwee Hong  jestan1...@yahoo.com wrote:
Hi all,


I've uploaded my pdb file 
at http://www.birg1.bioscience.com.my/joyce/protein_dock.pdb
Maybe someone can help me to look into it and see does it has any error.

 That link does not work.

Mark

 

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Re: [gmx-users] Re: pdb2gmx: segmentation fault

2011-01-13 Thread Kwee Hong
Sorry. Sorry.
This would be the working one. I've tested it outside my uni domain.

http://www.birg1.fbb.utm.my/joyce/protein_dock.pdb 

joyce




From: Justin A. Lemkul jalem...@vt.edu
To: Discussion list for GROMACS users gmx-users@gromacs.org
Sent: Friday, January 14, 2011 11:57:01
Subject: Re: [gmx-users] Re: pdb2gmx: segmentation fault



Kwee Hong wrote:
 Sorry, this should be correct link to download the file.

 http://www.birg1.bioscience.utm.my/joyce/protein_dock.pdb 

This link also does not work.

-Justin

 http://www.birg1.bioscience.com.my/joyce/protein_dock.pdb


 Joyce
 
 
 *From:* Mark Abraham mark.abra...@anu.edu.au
 *To:* Discussion list for GROMACS users gmx-users@gromacs.org
 *Sent:* Friday, January 14, 2011 11:29:45
 *Subject:* Re: [gmx-users] Re: pdb2gmx: segmentation fault
 
 
 
 On 01/14/11, *Kwee Hong * jestan1...@yahoo.com wrote:

 Hi all,

 I've uploaded my pdb file 
 at http://www.birg1.bioscience.com.my/joyce/protein_dock.pdb
 Maybe someone can help me to look into it and see does it has any error.

 That link does not work.
 
 Mark


 

-- 


Justin A. Lemkul
Ph.D. Candidate
ICTAS Doctoral Scholar
MILES-IGERT Trainee
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080
http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin


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Re: [gmx-users] Re: pdb2gmx: segmentation fault

2011-01-13 Thread Kwee Hong
It works.
Thanks a lot




From: Justin A. Lemkul jalem...@vt.edu
To: Gromacs Users' List gmx-users@gromacs.org
Sent: Friday, January 14, 2011 12:18:45
Subject: Re: [gmx-users] Re: pdb2gmx: segmentation fault



Kwee Hong wrote:
 Sorry. Sorry.
 This would be the working one. I've tested it outside my uni domain.
 
 http://www.birg1.fbb.utm.my/joyce/protein_dock.pdb 

Remove the www and it works for me.

Your .pdb file has several problems:

1. Loads of blank space at the end.
2. All lines are misformatted, with all columns after the chain identifier 
shifted by one space.  In vi, use :1,$s/ B / B/g to fix it.  This alleviates 
the 
seg fault.
3. Asn106 has its N atom labeled as residue 105.

Fixing all of the above resulted in a usable topology with Gromacs 4.5.3.

-Justin

 http://www.birg1.bioscience.utm.my/joyce/protein_dock.pdb 
 joyce
 
 
 *From:* Justin A. Lemkul jalem...@vt.edu
 *To:* Discussion list for GROMACS users gmx-users@gromacs.org
 *Sent:* Friday, January 14, 2011 11:57:01
 *Subject:* Re: [gmx-users] Re: pdb2gmx: segmentation fault
 
 
 
 Kwee Hong wrote:
   Sorry, this should be correct link to download the file.
  
   http://www.birg1.bioscience.utm.my/joyce/protein_dock.pdb
 
 This link also does not work.
 
 -Justin
 
   http://www.birg1.bioscience.com.my/joyce/protein_dock.pdb
  
  
   Joyce
  
   
   *From:* Mark Abraham mark.abra...@anu.edu.au 
mailto:mark.abra...@anu.edu.au
   *To:* Discussion list for GROMACS users gmx-users@gromacs.org 
mailto:gmx-users@gromacs.org
   *Sent:* Friday, January 14, 2011 11:29:45
   *Subject:* Re: [gmx-users] Re: pdb2gmx: segmentation fault
  
  
  
   On 01/14/11, *Kwee Hong * jestan1...@yahoo.com 
mailto:jestan1...@yahoo.com wrote:
  
   Hi all,
  
   I've uploaded my pdb file
   at http://www.birg1.bioscience.com.my/joyce/protein_dock.pdb
   Maybe someone can help me to look into it and see does it has any error.
  
   That link does not work.
  
   Mark
  
  
  
 
 -- 
 
 Justin A. Lemkul
 Ph.D. Candidate
 ICTAS Doctoral Scholar
 MILES-IGERT Trainee
 Department of Biochemistry
 Virginia Tech
 Blacksburg, VA
 jalemkul[at]vt.edu | (540) 231-9080
 http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin
 
 
 -- gmx-users mailing listgmx-users@gromacs.org 
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-- 

Justin A. Lemkul
Ph.D. Candidate
ICTAS Doctoral Scholar
MILES-IGERT Trainee
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080
http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin


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Re: [gmx-users] Re: pdb2gmx: segmentation fault

2011-01-13 Thread Kwee Hong
But Justin got it...




From: Mark Abraham mark.abra...@anu.edu.au
To: Discussion list for GROMACS users gmx-users@gromacs.org
Sent: Friday, January 14, 2011 12:18:49
Subject: Re: [gmx-users] Re: pdb2gmx: segmentation fault



On 01/14/11, Kwee Hong  jestan1...@yahoo.com wrote:
Sorry. Sorry.
This would be the working one. I've tested it outside my uni domain.


http://www.birg1.fbb.utm.my/joyce/protein_dock.pdb 

 Still dead.

Mark



joyce




From: Justin A. Lemkul jalem...@vt.edu
To: Discussion list for GROMACS users gmx-users@gromacs.org
Sent: Friday, January 14, 2011 11:57:01
Subject: Re: [gmx-users] Re: pdb2gmx: segmentation fault



Kwee Hong wrote:
 Sorry, this should be correct link to download the file.

 http://www.birg1.bioscience.utm.my/joyce/protein_dock.pdb 

This link also does not work.

-Justin

 http://www.birg1.bioscience.com.my/joyce/protein_dock.pdb


 Joyce
 
 
 *From:* Mark Abraham mark.abra...@anu.edu.au
 *To:* Discussion list  for GROMACS users gmx-users@gromacs.org
 *Sent:* Friday, January 14, 2011 11:29:45
 *Subject:* Re: [gmx-users] Re: pdb2gmx: segmentation fault
 
 
 
 On 01/14/11, *Kwee Hong * jestan1...@yahoo.com wrote:

 Hi all,

 I've uploaded my pdb file 
 at http://www.birg1.bioscience.com.my/joyce/protein_dock.pdb
 Maybe someone can help me to look into it and see does it has any error.

 That link does not work.
 
 Mark


 

-- 


Justin A. Lemkul
Ph.D. Candidate
ICTAS  Doctoral Scholar
MILES-IGERT Trainee
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080
http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin


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[gmx-users] pdb2gmx: segmentation fault

2011-01-12 Thread Kwee Hong
Hi,


 I was trying to generate topology file of my pdb using pdb2gmx.

Select the Force Field:
 0: GROMOS96 43a1 force field 
 1: GROMOS96 43a2 force field (improved alkane dihedrals)
 2: GROMOS96 45a3 force field (Schuler JCC 2001 22 1205)
 3: GROMOS96 53a5 force field (JCC 2004 vol 25 pag 1656) 
 4: GROMOS96 53a6 force field (JCC 2004 vol 25 pag 1656) 
 5: OPLS-AA/L all-atom force field (2001 aminoacid dihedrals)
 6: [DEPRECATED] Gromacs force field (see manual)
 7: [DEPRECATED] Gromacs force field with hydrogens for NMR
 8: Encad all-atom force field, using scaled-down vacuum charges
 9: Encad all-atom force field, using full solvent charges
4
Opening library file /usr/share/gromacs/top/ffG53a6.rtp
Opening library file /usr/share/gromacs/top/aminoacids.dat
Opening library file /usr/share/gromacs/top/aminoacids.dat
WARNING: masses will be determined based on residue and atom names,
 this can deviate from the real mass of the atom type
Opening library file /usr/share/gromacs/top/atommass.dat
Entries in atommass.dat: 178
WARNING: vdwradii will be determined based on residue and atom names,
 this can deviate from the real mass of the atom type
Opening library file /usr/share/gromacs/top/vdwradii.dat
Entries in vdwradii.dat: 28
Opening library file /usr/share/gromacs/top/dgsolv.dat
Entries in dgsolv.dat: 7
Opening library file /usr/share/gromacs/top/electroneg.dat
Entries  in electroneg.dat: 71
Opening library file /usr/share/gromacs/top/elements.dat
Entries in elements.dat: 218
Reading complex_SurA.pdb...
Read 3163 atoms
Opening library file /usr/share/gromacs/top/xlateat.dat
26 out of 26 lines of xlateat.dat converted succesfully
Analyzing pdb file
There are 1 chains and 0 blocks of water and 409 residues with 3163 atoms

  chain  #res #atoms
  1 'B'   409   3163  

All occupancy fields zero. This is probably not an X-Ray structure
Opening library file /usr/share/gromacs/top/ffG53a6.atp
Atomtype 1
Reading residue database... (ffG53a6)
Opening library file /usr/share/gromacs/top/ffG53a6.rtp
Using default: not generating all possible dihedrals
Using default: excluding 3 bonded neighbors
Using default: generating 1,4 H--H interactions
Using default: removing impropers on same bond as a proper
Residue 108
Sorting it all out...
Opening library file /usr/share/gromacs/top/ffG53a6.hdb
Opening library file /usr/share/gromacs/top/ffG53a6-n.tdb
Opening library file /usr/share/gromacs/top/ffG53a6-c.tdb

Back Off! I just backed up topol_SurA.top to ./#topol_SurA.top.1#
Processing chain 1 'B' (3163 atoms, 409 residues)
There are 629 donors and 614 acceptors
Segmentation fault

Yet I encountered segmentation fault which I don't understand why this happen.
All suggestion are welcomed?

Thanks.

Joyce


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Re: [gmx-users] pdb2gmx: segmentation fault

2011-01-12 Thread Kwee Hong
Hi Mark,

I tried v 4.0.7 and 4.5.1. Both experiencing the same situation.
The file is actually saved as pdb file from autodock output using pymol.

Joyce





From: Mark Abraham mark.abra...@anu.edu.au
To: Discussion list for GROMACS users gmx-users@gromacs.org
Sent: Thursday, January 13, 2011 13:43:47
Subject: Re: [gmx-users] pdb2gmx: segmentation fault



On 01/13/11, Kwee Hong  jestan1...@yahoo.com wrote:
Hi,


 I was trying to generate topology file of my pdb using pdb2gmx.


Select the Force Field:
 0: GROMOS96 43a1 force  field 
 1: GROMOS96 43a2 force field (improved alkane dihedrals)
 2: GROMOS96 45a3 force field (Schuler JCC 2001 22 1205)
 3: GROMOS96 53a5 force field (JCC 2004 vol 25 pag 1656) 
 4: GROMOS96 53a6 force field (JCC 2004 vol 25 pag 1656) 
 5: OPLS-AA/L all-atom force field (2001 aminoacid dihedrals)
 6: [DEPRECATED]  Gromacs force field (see manual)
 7: [DEPRECATED] Gromacs force field with hydrogens for NMR
 8: Encad all-atom force field, using scaled-down vacuum charges
 9: Encad all-atom force field, using full solvent charges
4
Opening library file /usr/share/gromacs/top/ffG53a6.rtp
Opening library file  /usr/share/gromacs/top/aminoacids.dat
Opening library file /usr/share/gromacs/top/aminoacids.dat
WARNING: masses will be determined based on residue and atom names,
 this can deviate from the real mass of the atom type
Opening library file /usr/share/gromacs/top/atommass.dat
Entries in atommass.dat: 178
WARNING: vdwradii will be determined based on residue and atom names,
 this can deviate from the real mass of the atom type
Opening library file /usr/share/gromacs/top/vdwradii.dat
Entries in vdwradii.dat: 28
Opening library file /usr/share/gromacs/top/dgsolv.dat
Entries in dgsolv.dat: 7
Opening library file /usr/share/gromacs/top/electroneg.dat
Entries  in electroneg.dat: 71
Opening library file /usr/share/gromacs/top/elements.dat
Entries in elements.dat: 218
Reading complex_SurA.pdb...
Read 3163 atoms
Opening library file /usr/share/gromacs/top/xlateat.dat
26 out of 26 lines of xlateat.dat converted succesfully
Analyzing pdb file
There are 1 chains and 0 blocks of water and 409 residues with 3163 atoms


  chain  #res #atoms
  1 'B'   409   3163  


All occupancy fields zero. This is probably not an X-Ray structure
Opening library file /usr/share/gromacs/top/ffG53a6.atp
Atomtype 1
Reading residue database... (ffG53a6)
Opening library file /usr/share/gromacs/top/ffG53a6.rtp
Using default: not generating all possible dihedrals
Using default: excluding 3 bonded neighbors
Using default: generating 1,4 H--H interactions
Using default: removing impropers on same bond as a proper
Residue 108
Sorting it all out...
Opening library file /usr/share/gromacs/top/ffG53a6.hdb
Opening library file /usr/share/gromacs/top/ffG53a6-n.tdb
Opening library file /usr/share/gromacs/top/ffG53a6-c.tdb


Back Off! I just backed up topol_SurA.top to ./#topol_SurA.top.1#
Processing chain 1 'B' (3163 atoms, 409 residues)
There are 629 donors and 614 acceptors
Segmentation fault


Yet I encountered segmentation fault which I don't understand why this happen.
All suggestion are welcomed? 
Please remember to announce your GROMACS version when discussing problems, and 
to try the latest one.

Mark


 

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Re: [gmx-users] top2psf.pl is generating some bonds to atoms with index 0.

2010-10-20 Thread Kwee Hong
Alright.. 

I actually simulated my protein for 5ns. Then I loaded the trajectory file and 
.gro file in vmd. Then, I extracted one of the frame and write it into pdb 
format, When I open it with vmd, one of the atom from a residue is connected to 
another atom in another residue. Things like this happens as VMD uses a 
distance-based bond determination heuristic. Therefore, I would need a 
structure 
file which  specifies the bonds for my structure so that VMD doesn't have to 
guess.

So how can I generate the structure file I needed?

Thanks.

Regards,
Joyce






From: Justin A. Lemkul jalem...@vt.edu
To: Gromacs Users' List gmx-users@gromacs.org
Sent: Wednesday, October 20, 2010 2:25:26
Subject: Re: [gmx-users] top2psf.pl is generating some bonds to atoms with 
index 
0.



Kwee Hong wrote:
 I executed the script at the therminal by typing
 perl top2psf.pl -i topol.top -o zz.psf
 Here, I attached my input file.
 

Your topology does not correspond to a MARTINI coarse-grained topology.  As 
such, probably a bunch of the pattern matching is getting incorrect 
information.  You cannot use top2psf.pl with this type of topology.  It was 
created for a very specific purpose and requires that format, nothing else.

-Justin

 
 *From:* Justin A. Lemkul jalem...@vt.edu
 *To:* Discussion list for GROMACS users gmx-users@gromacs.org
 *Sent:* Wednesday, October 20, 2010 2:14:34
 *Subject:* Re: [gmx-users] top2psf.pl is generating some bonds to atoms with 
index 0.
 
 
 
 Kwee Hong wrote:
   Hi,
  
   I've got a top2psf.pl script from the web and used it to generate a psf 
file. Yet it generated  some bonds to atoms with index 0 which should not 
occur.  It causes VMD cannot load it and had a segmentation fault.
   vmd  Info) Using plugin psf for structure file /home/birg/Desktop/zz.psf
   ERROR) Error reading bond information.
   Segmentation fault
  
   I wonder am I getting the right top2psf.pl.  Or is there any place I can 
 get 
the latest stable version of that script?
  
 
 There is only one version.  Zeros are only printed if something goes wrong, 
i.e. you have provided the wrong input or something else has failed.
 
 Based solely on the information you've provided I cannot diagnose what has 
 gone 
wrong.
 
 -Justin
 
   Here, I attached the perl script I used.
  
   Thanks.
  
   Regards,
   Joyce
  
 
 -- 
 
 Justin A. Lemkul
 Ph.D. Candidate
 ICTAS Doctoral Scholar
 MILES-IGERT Trainee
 Department of Biochemistry
 Virginia Tech
 Blacksburg, VA
 jalemkul[at]vt.edu | (540) 231-9080
 http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin
 
 
 -- gmx-users mailing listgmx-users@gromacs.org 
mailto:gmx-users@gromacs.org
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 Please search the archive at 
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 or 
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mailto:gmx-users-requ...@gromacs.org.
 Can't post? Read http://www.gromacs.org/Support/Mailing_Lists
 

-- 

Justin A. Lemkul
Ph.D. Candidate
ICTAS Doctoral Scholar
MILES-IGERT Trainee
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080
http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin


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[gmx-users] top2psf.pl is generating some bonds to atoms with index 0.

2010-10-19 Thread Kwee Hong
Hi,

I've got a top2psf.pl script from the web and used it to generate a psf file. 
Yet it generated  some bonds to atoms with index 0 which should not occur.  It 
causes VMD cannot load it and had a segmentation fault.  


vmd  Info) Using plugin psf for structure file /home/birg/Desktop/zz.psf
ERROR) Error reading bond information.
Segmentation fault

I wonder am I getting the right top2psf.pl.  Or is there any place I can get 
the 
latest stable version of that script? 


Here, I attached the perl script I used.

Thanks.

Regards,
Joyce




top2psf.pl
Description: Binary data
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[gmx-users] problem while simulating metal ions

2010-07-06 Thread Kwee Hong


Hi.

I'm trying to subject a metalloprotein bound to cadmium to  a molecular 
dynamics. I've defined the cadmium ion in the atom type  parameter file 
(ffGa56a6.atp) and residue database (ffG53a6.rtp). And  the bond length and 
bond  
angle between the cadmium and sulphur of the metalloprotein had been  define in 
the force field file, too (ffG53a6abon.itp). As special bond  is expected to be 
formed between the sulphur of cysteine and the cadmium  ions, I've added the 
relevant information into specbond.dat.

But when I  run the pdb2gmx, there is no entries in the [ bonds ] and [ angles 
] 
for  those bond length and bond angle. And of course, as there is no entries  
in 
those parameter, there was no cadmium-thiolate bond observed when I  visualised 
the structure using pymol. So, does that mean  that I would need to  add them 
on 
manually? 


To proceed with my simulation, I added the  values in [ bonds ] and [ angles ] 
manually. And as I do not have the  relevant dihedral angle value from the 
literature, I've deleted those  entries in my topology file and continue to 
prepare and subject the  protein to energy minimization. During EM, the 
potential energy of the  system started to remain constant at step 124 and 
eventually steepest  descents converged to machine precision in 128 steps with 
the maximum  force is on atom 279 which would be one of the cadmium ions in the 
 
system. When I visualised the system, one water molecule was found to  attached 
with atom 279, so I deleted that water molecule and subject the  system to em 
again. Yet the same thing occur after running for 49  steps. What had gone 
wrong 
with my system? Is that cadmium molecule had  been running too far until it has 
gone out of the protein as water  molecule are not suppose to come into the 
protein. 


Any suggestion is welcomed.

Thanks in advance.

Regards,
Joyce


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[gmx-users] Problem on forming bonds

2010-06-24 Thread Kwee Hong
Hi.

I'm trying to subject a metalloprotein bound to cadmium to a molecular
dynamics. I've defined the cadmium ion in the atom type parameter file
(ffGa56a6.atp) and residue database (ffG53a6.rtp). And the bond length and
bond angle between the cadmium and sulphur of the metalloprotein had been
define in the force field file, too (ffG53a6abon.itp). As special bond is
expected to be formed between the sulphur of cysteine and the cadmium ions,
I've added the relevant information into specbond.dat.

But when I run the pdb2gmx, there is no entries in the [ bonds ] and [
angles ] for those bond length and bond angle. I've attached a sample of the
topology generated by pdb2gmx in the attachment. Please kindly refer to it.
And of course, as there is no entries in those parameter, there was no
cadmium-thiolate bond observed when I visualised the structure using pymol.
So, does that mean that I would need to add them on manually?

To proceed with my simulation, I added the values in [ bonds ] and [ angles
] manually. And as I do not have the relevant dihedral angle value from the
literature, I've deleted those entries in my topology file and continue to
prepare and subject the protein to energy minimization. During EM, the
potential energy of the system started to remain constant at step 124 and
eventually steepest descents converged to machine precision in 128 steps
with the maximum force is on atom 279 which would be one of the cadmium ions
in the system. When I visualised the system, one water molecule was found to
attached with atom 279, so I deleted that water molecule and subject the
system to em again. Yet the same thing occur after running for 49 steps.
What had gone wrong with my system? Is that cadmium molecule had been
running too far until it has gone out of the protein as water molecule are
not suppose to come into the protein.

Any suggestion is welcomed.

Thanks in advance.

Regards,
Joyce


topol_sample
Description: Binary data
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[gmx-users] Downloading DSSP onto iMAC

2008-11-27 Thread Kwee Hong
Hi.
I'm in the midst of downloading DSSP onto my iMAC. But I'm having some error
here:
rsync: failed to connect to rsync.cmbi.ru.nl: Connection refused (61)
rsync error: error in socket IO (code 10) at
/SourceCache/rsync/rsync-35.2/rsync/clientserver.c(105) [receiver=2.6.9]
I suppose it is caused by the syntax (rsync) I'm using as I'm trying to
download onto iMAC and not linux.
Can someone tell me the correct syntax to do so?

Thanks.

Regards,
Joyce
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[gmx-users] (no subject)

2008-11-17 Thread Kwee Hong
Hi. When I was trying to do the test run for my installed gromacs, I got
message below return to me even though i've source GMXRC (source
/usr/local/gromacs/bin/GMXRC). Can some one tell me why? Thanks.

bcsb09s-imac52:bin bcsb09$ ./gmxtest.pl all
102 out of 102 simple tests FAILED
sh: grompp.out: Permission denied
No topol.tpr file in bin. grompp failed
FAILED. Check files in bin
sh: grompp.out: Permission denied
No topol.tpr file in include. grompp failed
FAILED. Check files in include
sh: grompp.out: Permission denied
No topol.tpr file in lib. grompp failed
FAILED. Check files in lib
sh: grompp.out: Permission denied
No topol.tpr file in share. grompp failed
FAILED. Check files in share
4 out of 4 complex tests FAILED
sh: grompp.out: Permission denied
No topol.tpr file in OpenSourceLicenses. grompp failed
FAILED. Check files in OpenSourceLicenses
sh: grompp.out: Permission denied
No topol.tpr file in OpenSourceVersions. grompp failed
FAILED. Check files in OpenSourceVersions
sh: grompp.out: Permission denied
No topol.tpr file in bin. grompp failed
FAILED. Check files in bin
sh: grompp.out: Permission denied
No topol.tpr file in gromacs. grompp failed
FAILED. Check files in gromacs
sh: grompp.out: Permission denied
No topol.tpr file in i386-mingw32-3.4.5. grompp failed
FAILED. Check files in i386-mingw32-3.4.5
sh: grompp.out: Permission denied
No topol.tpr file in include. grompp failed
FAILED. Check files in include
sh: grompp.out: Permission denied
No topol.tpr file in info. grompp failed
FAILED. Check files in info
sh: grompp.out: Permission denied
No topol.tpr file in lib. grompp failed
FAILED. Check files in lib
sh: grompp.out: Permission denied
No topol.tpr file in share. grompp failed
FAILED. Check files in share
9 out of 9 kernel tests FAILED
Opening pdb2gmx.log for writing at ./gmxtest.pl line 300.

Regards..
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Re: [gmx-users] cannot generate .top file

2008-10-28 Thread Kwee Hong
Hi. Thanks for your enlightenment. Now, I'm able to run pdb2gmx with the
output files produced. I just added 'sudo' before ./pdb2gmx and it allows me
to write in the directory. But unfortunately, this step seem does not work
for ./gmxtest.pl. I'm having the same output even after i had added 'sudo'
in front of it.
Joyce

On Fri, Oct 24, 2008 at 8:52 PM, Mark Abraham [EMAIL PROTECTED]wrote:

 Kwee Hong wrote:

 Hi.
 I seem having some problem in running ./pdb2gmx. Here is the output file.
 Can you help me in giving me some idea to deal with this?

 bcsb09s-imac52:bin bcsb09$ pdb2gmx -f 1aml.pdb -p 1aml.top -o 1aml.gro


 snip

 ---
 Program pdb2gmx, VERSION 3.3.3
 Source code file: futil.c, line: 313

 File input/output error:
 1aml.top
 ---


 This means it can't write 1aml.top, which likely means you don't have write
 permission to the directory in which pdb2gmx resides. This is a Good Thing.
 You should do daily work in a suitable subdirectory of (say) your home
 directory, and adjust your environment variables to give you ready access to
 GROMACS stuff by using source /path/to/GMXRC using the  path in which you
 installed the GROMACS binaries. I guess this is your attempted working
 directory above.

  I seem to be having problem in running the test tun as well. Below is its
 output:
 bcsb09s-imac52:bin bcsb09$ ./gmxtest.pl
 Usage: ./gmxtest.pl [ -np N ] [-verbose ] [ -double ] [ simple | complex |
 kernel | pdb2gmx | all ]
   or: ./gmxtest.pl clean | refclean | dist


 Again this won't work in a directory in which you don't have write
 permissions. The above message tells you that an empty command line isn't
 acceptable to gmxtest.pl. *Technically* it ought to be acceptable per the
 usage line, since square brackets denote optional things and |-symbols
 denote a series of mutually-exclusive possibilities. I think the brackets
 should be missing around simple | complex | kernel | pdb2gmx | all.

 Mark
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Re: [gmx-users] cannot generate .top file

2008-10-28 Thread Kwee Hong
Oo.. I'm so sorry for I'm not aware of this. But I'm really new to linux
environment and don't really have a good mastering skill on the commandline
that it works with. As you said that I'm not given the permission to write
in that directory, sudo was the only thing that I can think of out from my
knowledge. I don't really know how to do my work at the subdirectory of my
hoe directory. And does the meaning of adjust your environment variables to
give you ready access to GROMACS stuff by using source /path/to/GMXRC
using the  path in which you installed the GROMACS binaries requires me to
make some changes in the source code or just by typing source
/path/to/GMXRC at the terminal would have open the access for me in the
directory? I'm sorry for my ignorance... I think I would better get some
books on linux environment and read on it first.

Joyce

On Wed, Oct 29, 2008 at 12:11 PM, Mark Abraham [EMAIL PROTECTED]wrote:

 Kwee Hong wrote:

 Hi. Thanks for your enlightenment. Now, I'm able to run pdb2gmx with the
 output files produced. I just added 'sudo' before ./pdb2gmx and it allows me
 to write in the directory. But unfortunately, this step seem does not work
 for ./gmxtest.pl. I'm having the same output even after i had added 'sudo'
 in front of it.


 If you do this kind of thing, your machine is a ticking time bomb. I gave
 you good advice last time. I'm not going to give you more :-)


 Mark
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[gmx-users] cannot generate .top file

2008-10-24 Thread Kwee Hong
Hi.
I seem having some problem in running ./pdb2gmx. Here is the output file.
Can you help me in giving me some idea to deal with this?

bcsb09s-imac52:bin bcsb09$ pdb2gmx -f 1aml.pdb -p 1aml.top -o 1aml.gro
 :-)  G  R  O  M  A  C  S  (-:

Getting the Right Output Means no Artefacts in Calculating Stuff

:-)  VERSION 3.3.3  (-:


  Written by David van der Spoel, Erik Lindahl, Berk Hess, and others.
   Copyright (c) 1991-2000, University of Groningen, The Netherlands.
 Copyright (c) 2001-2008, The GROMACS development team,
check out http://www.gromacs.org for more information.

 This program is free software; you can redistribute it and/or
  modify it under the terms of the GNU General Public License
 as published by the Free Software Foundation; either version 2
 of the License, or (at your option) any later version.

   :-)  pdb2gmx  (-:

Option Filename  Type Description

  -f   1aml.pdb  InputGeneric structure: gro g96 pdb tpr tpb tpa
   xml
  -o   1aml.gro  Output   Generic structure: gro g96 pdb xml
  -p   1aml.top  Output   Topology file
  -i  posre.itp  Output   Include file for topology
  -n  clean.ndx  Output, Opt. Index file
  -q  clean.pdb  Output, Opt. Generic structure: gro g96 pdb xml

Option   Type   Value   Description
--
-[no]h   bool   no  Print help info and quit
-niceint0   Set the nicelevel
-[no]merge   bool   no  Merge chains into one molecule definition
-ff  string select  Force field, interactive by default. Use -h for
information.
-water   enum   spc Water model to use: with GROMOS we recommend
SPC,
with OPLS, TIP4P: spc, spce, tip3p, tip4p, tip5p
or f3c
-[no]inter   bool   no  Set the next 6 options to interactive
-[no]ss  bool   no  Interactive SS bridge selection
-[no]ter bool   no  Interactive termini selection, iso charged
-[no]lys bool   no  Interactive Lysine selection, iso charged
-[no]arg bool   no  Interactive Arganine selection, iso charged
-[no]asp bool   no  Interactive Aspartic Acid selection, iso charged
-[no]glu bool   no  Interactive Glutamic Acid selection, iso charged
-[no]gln bool   no  Interactive Glutamine selection, iso neutral
-[no]his bool   no  Interactive Histidine selection, iso checking
H-bonds
-angle   real   135 Minimum hydrogen-donor-acceptor angle for a
H-bond (degrees)
-distreal   0.3 Maximum donor-acceptor distance for a H-bond
(nm)
-[no]una bool   no  Select aromatic rings with united CH atoms on
Phenylalanine, Tryptophane and Tyrosine
-[no]ignhbool   no  Ignore hydrogen atoms that are in the pdb file
-[no]missing bool   no  Continue when atoms are missing, dangerous
-[no]v   bool   no  Be slightly more verbose in messages
-posrefc real   1000Force constant for position restraints
-vsite   enum   noneConvert atoms to virtual sites: none, hydrogens
or aromatics
-[no]heavyh  bool   no  Make hydrogen atoms heavy
-[no]deuterate bool no  Change the mass of hydrogens to 2 amu

Opening library file /usr/local/gromacs/share/gromacs/top/FF.dat

Select the Force Field:
 0: GROMOS96 43a1 force field
 1: GROMOS96 43b1 vacuum force field
 2: GROMOS96 43a2 force field (improved alkane dihedrals)
 3: GROMOS96 45a3 force field (Schuler JCC 2001 22 1205)
 4: GROMOS96 53a5 force field (JCC 2004 vol 25 pag 1656)
 5: GROMOS96 53a6 force field (JCC 2004 vol 25 pag 1656)
 6: OPLS-AA/L all-atom force field (2001 aminoacid dihedrals)
 7: Encad all-atom force field, using scaled-down vacuum charges
 8: Encad all-atom force field, using full solvent charges
2
Opening library file /usr/local/gromacs/share/gromacs/top/ffG43a2.rtp
Opening library file /usr/local/gromacs/share/gromacs/top/aminoacids.dat
Reading 1aml.pdb...
Read 'AMYLOID A4', 598 atoms
Opening library file /usr/local/gromacs/share/gromacs/top/xlateat.dat
26 out of 26 lines of xlateat.dat converted succesfully
Analyzing pdb file
There are 1 chains and 0 blocks of water and 40 residues with 598 atoms

  chain  #res #atoms
  1 ' '40598

All occupancies are one
Opening library file /usr/local/gromacs/share/gromacs/top/ffG43a2.atp
Atomtype 50
Reading residue database... (ffG43a2)
Opening library file /usr/local/gromacs/share/gromacs/top/ffG43a2.rtp
Residue 96
Sorting it all out...
Opening library file /usr/local/gromacs/share/gromacs/top/ffG43a2.hdb
Opening library file 

[gmx-users] Installation on iMAC

2008-10-09 Thread Kwee Hong
Hi.
I'm very new to iMAC as I've just started to use it for about one month. I
would like to install GROMACS on it but i seem can't find any step-to-step
installation instruction. All those that I found was seem to be instruction
for linux. Can you give me some idea on how to get the installation
instruction?

Thank you very much.


Best regards,

Joyssstan
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