Re: [gmx-users] problem while running grompp command

2011-05-09 Thread Justin A. Lemkul



rashi parihar wrote:

Hi all.
I am doing dynamics studies of protein-ligand dynamics.When I am running 
grompp command error is coming atomtype SDMSO NOT FOUND . I checked in 
drg.itp file

[ atoms ]
; nr type resnr resid atom cgnr charge mass
1 OM 1 LIG OXT 1 -0.758 15.9994
2 C 1 LIG C 1 0.362 12.0110
3 OM 1 LIG O 1 -0.758 15.9994
4 CH1 1 LIG CA 1 0.154 13.0190
5 NL 1 LIG N 2 0.590 14.0067
6 H 1 LIG H3 2 0.001 1.0080
7 H 1 LIG H4 2 0.002 1.0080
8 H 1 LIG H1 2 0.002 1.0080
9 CH2 1 LIG CB 2 0.109 14.0270
10 CH2 1 LIG CG 2 0.109 14.0270
11 SDMSO 1 LIG SD 2 0.974 32.0600
now in 11th row SDMSO IS PRESENT.How can I solve this problem?plz help me!!!



The problem is that your topology file is calling SDMSO, which does not exist. 
 All Gromos force fields use SDmso - capitalization matters.  Check the .atp 
file for your chosen force field to be sure of the requirements of the force field.


It looks to me like this is a PRODRG output.  Please see the paper linked from 
http://www.gromacs.org/Downloads/Related_Software/PRODRG#Tips as to why you 
should likely not use this topology in its current state for anything.


-Justin


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Regards,

Rashi



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ICTAS Doctoral Scholar
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Department of Biochemistry
Virginia Tech
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[gmx-users] problem in running grompp

2009-06-10 Thread Samik Bhattacharya
hi, i am simulating a membrane protein inside dppc bilayer and in this regard i 
am following justin's tutorial. but i ma facing a problem in running 
grompp...whenever i run it is giving error 

Program grompp, VERSION 4.0.5
Source code file: grompp.c, line: 362

Fatal error:
number of coordinates in coordinate file (1A68_genbox.gro, 49128)
 does not match topology (1A68.top, 48628)

now how to solve this problem? i have first generated the lipid box  with the 
protein then solvated it. i really need little bit of help to proceed to the 
next step...
Thaking You...
Shamik





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Re: [gmx-users] problem in running grompp

2009-06-09 Thread Samik Bhattacharya


--- On Mon, 8/6/09, Justin A. Lemkul jalem...@vt.edu wrote:

From: Justin A. Lemkul jalem...@vt.edu
Subject: Re: [gmx-users] problem in running grompp
To: Discussion list for GROMACS users gmx-users@gromacs.org
Date: Monday, 8 June, 2009, 4:47 PM



Samik Bhattacharya wrote:
 hi
 i am simulating a membrane protein in POPC bilayer and for that i am 
 following justin's tutorial.it's a nice tutorial and is really helpful. but 
 i'm facing some problems in running the grompp command. after the solvation 
 when i am going to run grompp, it is generting an error as follows  
 ''Program grompp, VERSION 4.0.5
 Source code file: toppush.c, line: 843
 
 Fatal error:
 Atomtype CA not found''
 
 but  is not CA the main chain alpha carbon...why is not grompp taking CA 
 then? i can't make out where the problem lies? i little help on this shall be 
 very encouraging.

If you're seeing this error, then you've done something wrong when combining 
lipid.itp with the Gromos force field file.

-Justin

 Thank You
 Shamik
 
 
 
Thank you Justin for the answar. but now how to solve it? where should i make 
changes to correct that? pls let me know what to do... waiting for your 
answar
Thank you again..
 
 
 
 
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ICTAS Doctoral Scholar
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] problem in running grompp

2009-06-09 Thread Justin A. Lemkul



Samik Bhattacharya wrote:


Thank you Justin for the answar. but now how to solve it? where
should i make changes to correct that? pls let me know what to do...
waiting for your answar
Thank you again..


CA is not an alpha-carbon, it is a ffgmx atom type.  So, therefore, you have 
copies some ffgmx parameters into the ffG53a6nb_lipid.itp that the tutorial 
describes, probably from the ;; parameters for lipid-GROMOS interactions which 
the tutorial clearly tells you to delete.


-Justin


 
 
 

 
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ICTAS Doctoral Scholar
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080
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Ph.D. Candidate
ICTAS Doctoral Scholar
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] problem in running grompp

2009-06-08 Thread Samik Bhattacharya
hi
i am simulating a membrane protein in POPC bilayer and for that i am following 
justin's tutorial.it's a nice tutorial and is really helpful. but i'm facing 
some problems in running the grompp command. after the solvation when i am 
going to run grompp, it is generting an error as follows    
''Program grompp, VERSION 4.0.5
Source code file: toppush.c, line: 843

Fatal error:
Atomtype CA not found''

but  is not CA the main chain alpha carbon...why is not grompp taking CA then? 
i can't make out where the problem lies? i little help on this shall be very 
encouraging.
Thank You
Shamik




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Re: [gmx-users] problem in running grompp

2009-06-08 Thread Justin A. Lemkul



Samik Bhattacharya wrote:

hi
i am simulating a membrane protein in POPC bilayer and for that i am 
following justin's tutorial.it's a nice tutorial and is really helpful. 
but i'm facing some problems in running the grompp command. after the 
solvation when i am going to run grompp, it is generting an error as 
follows  
''Program grompp, VERSION 4.0.5

Source code file: toppush.c, line: 843

Fatal error:
Atomtype CA not found''

but  is not CA the main chain alpha carbon...why is not grompp taking CA 
then? i can't make out where the problem lies? i little help on this 
shall be very encouraging.


If you're seeing this error, then you've done something wrong when combining 
lipid.itp with the Gromos force field file.


-Justin


Thank You
Shamik



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Justin A. Lemkul
Ph.D. Candidate
ICTAS Doctoral Scholar
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] problem in running grompp

2009-03-05 Thread victor doss

Hello,

when I run grompp  I get the following error message always. Whoever has  a 
correct fix to get rid of this error message and get the actual result,  Please 
suggest.

Thanking you


Dr. Victor A. Doss


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