[gmx-users] About Zinc coordination

2010-02-19 Thread babu gokul
Dear all I would like to simulate the molecule which consist of a zn atom coordinated to four CYS residue.  I would like to know how to insert the parameters for zn coordination. As I am new to Gromacs I would like to have detailed description.I would like to use OPLS force field. Thanking you

[gmx-users] About Zinc coordination

2010-02-19 Thread babu gokul
Dear all I would like to simulate the molecule which consist of a zn atom coordinated to four CYS residue.  I would like to know how to insert the parameters for zn coordination. As I am new to Gromacs I would like to have detailed description.I would like to use OPLS force field. Thanking you E

[gmx-users] (no subject)

2010-02-19 Thread babu gokul
Dear all I would like to simulate the molecule which consist of a zn atom coordinated to four CYS residue.  I would like to know how to insert the parameters for zn coordination. As I am new to Gromacs I would like to have detailed description.I would like to use OPLS force field. Thanking you

RE: [gmx-users] About Zinc coordination

2010-02-19 Thread Kukol, Andreas
If you are new to Gromcs you must study all the documentation/tutorials/HowTo's first, in particular this one about parametrization of new molecules: http://www.gromacs.org/Documentation/How-tos/Parameterization Andreas --- From: gmx-users-boun...@gromacs.org

Re: [gmx-users] Assembling a good simulation starting point

2010-02-19 Thread Ran Friedman, Biochemisches Inst.
Hello John, How large was the force after EM? Large forces often results in systems that explode during the simulation. Also, did you minimise with or without solvent? You assessment seems correct - the initial structure wasn't minimised and the tools of the trade are trying different

[gmx-users] Re:Indexing specific atoms

2010-02-19 Thread parthiban
Hello, Can anyone tell, how to index two specific atoms, (one form protein and one from ligand) eg; 440th atom of protein 450th atom of small molecule or OED of small molecule. My second question is: how to calculate the distance b/w these two atoms. i tried g_dist by including the indexed

Re: [gmx-users] Re:Indexing specific atoms

2010-02-19 Thread shayamra
Hello Parthiban, Can you elaborate more on the 'wrong answer'? Perhaps the following link can shed some light on the 'wrong' answer: http://lists.gromacs.org/pipermail/gmx-users/2009-March/040276.html [Deals with g_dist and PBC] Regards, -Shay Quoting parthi...@ncbs.res.in: Hello, Can

Re: [gmx-users] Re:Indexing specific atoms

2010-02-19 Thread Erik Marklund
shaya...@post.tau.ac.il skrev: Hello Parthiban, Can you elaborate more on the 'wrong answer'? Perhaps the following link can shed some light on the 'wrong' answer: http://lists.gromacs.org/pipermail/gmx-users/2009-March/040276.html [Deals with g_dist and PBC] Regards, -Shay Quoting

Re: [gmx-users] (no subject)

2010-02-19 Thread Tsjerk Wassenaar
Hi E R Azhagiya singam, You first have to ask yourself whether you're up to it. This is considered an advanded topic. In particular for groups like these. To start with, do you know the protonation state of the Zn(Cys)4 group in your case? Cheers, Tsjerk On Fri, Feb 19, 2010 at 9:14 AM, babu

Re: [gmx-users] Help with Segmentation fault!!!

2010-02-19 Thread Maurício Menegatti Rigo
But what is the real problem about the use of -DFLEXIBLE? Will I get wrong calculations from MD if I define it? Or it is just a matter of time (DFLEXIBLE = take longer) ?? 2010/2/18 Tsjerk Wassenaar tsje...@gmail.com Hi Deisy, define = -DFLEXIBLE integrator

Re: [gmx-users] Help with Segmentation fault!!!

2010-02-19 Thread Mark Abraham
- Original Message - From: Maurício Menegatti Rigo mauriciomr1...@gmail.com Date: Friday, February 19, 2010 22:28 Subject: Re: [gmx-users] Help with Segmentation fault!!! To: Discussion list for GROMACS users gmx-users@gromacs.org But what is the real problem about the use of -DFLEXIBLE?

[gmx-users] Coefficients for user-defined tabulated potentials (topol.top + table.xvg)

2010-02-19 Thread David Waroquiers
Hello ! I would like to have some information about how to set the coefficients for tabulated potentials. I'm using coulombtype ewald and vdwtype user so I have to define tables for each pair of atoms (and/or one table all the rest of them) : table.xvg table_Si_O.xvg table_Si_Si.xvg

[gmx-users] Backbone and MainChain

2010-02-19 Thread Chih-Ying Lin
Hi From Gromacs Manual: - Backbone: all protein backbone atoms (C-alpha, N, C) - MainChain: backbone atoms, plus the carbonyl oxygens The following is part of .gro file. I listed the atom number, are those all correct ? C-alpha: 161,170,179 N:158,163, 172 C: ??? what does this C

[gmx-users] domain decomposition and load balancing

2010-02-19 Thread Amit Choubey
Hi Everyone, I am trying to run a simulation with the option pbc=xy turned on. I am using 64 processors for the simulation. The mdrun_mpi evokes the following error message before starting the md steps There is no domain decomposition for 64 nodes that is compatible with the given box and a

Re: [gmx-users] domain decomposition and load balancing

2010-02-19 Thread Mark Abraham
- Original Message - From: Amit Choubey kgp.a...@gmail.com Date: Saturday, February 20, 2010 8:51 Subject: [gmx-users] domain decomposition and load balancing To: Discussion list for GROMACS users gmx-users@gromacs.org Hi Everyone, I am trying to run a simulation with the option pbc=xy

Re: [gmx-users] domain decomposition and load balancing

2010-02-19 Thread Amit Choubey
Hi Mark, I am not using PME calculation. I was hoping mdrun will do the cell allocation itself. Thanks, Amit On Fri, Feb 19, 2010 at 2:27 PM, Mark Abraham mark.abra...@anu.edu.auwrote: - Original Message - From: Amit Choubey kgp.a...@gmail.com Date: Saturday, February 20, 2010

Re: [gmx-users] domain decomposition and load balancing

2010-02-19 Thread Amit Choubey
Hi Mark, I dont think i need to play with npme at all. Amit On Fri, Feb 19, 2010 at 2:41 PM, Amit Choubey kgp.a...@gmail.com wrote: Hi Mark, I am not using PME calculation. I was hoping mdrun will do the cell allocation itself. Thanks, Amit On Fri, Feb 19, 2010 at 2:27 PM, Mark

Re: [gmx-users] domain decomposition and load balancing

2010-02-19 Thread Mark Abraham
- Original Message - From: Amit Choubey kgp.a...@gmail.com Date: Saturday, February 20, 2010 10:25 Subject: Re: [gmx-users] domain decomposition and load balancing To: Discussion list for GROMACS users gmx-users@gromacs.org Hi Mark and Justin, I am using a box of size

Re: [gmx-users] domain decomposition and load balancing

2010-02-19 Thread Amit Choubey
the log file just lists all the parameters of the simulation, following is a part of it parameters of the run: integrator = md nsteps = 4000 init_step= 0 ns_type = Grid nstlist = 10 ndelta = 2 nstcomm

[gmx-users] Normal Mode analysis

2010-02-19 Thread Ajit Datta
Hello everyone, I am trying to do normal mode analysis for a protein using Gromacs. Can anyone point me out towards a sample mdp file that I could edit for this purpose? Thanks Ajit B. -- gmx-users mailing listgmx-users@gromacs.org