Re: [gmx-users] retrieve box size from .trr or .tpr

2013-11-30 Thread Tsjerk Wassenaar
Hi Saman, You can convert the tpr file to pdb/gro with editconf, and you can convert (a frame of) the .trr file to gro/pdb with trjconv. Hope it helps, Tsjerk On Sat, Nov 30, 2013 at 8:43 AM, Saman Shahriyari samanshahriy...@yahoo.com wrote: Dear users is there any way to retrieve box

[gmx-users] umbrella versus constraint in the pulling code

2013-11-30 Thread Dr. Vitaly Chaban
Could anyone please explain the difference between how umbrella and constaint options in the pulling code work. Based on the manual, I expect that the only difference is that umbrella used harmonic potential to bind pulled group to the reference group (point), while constraint uses shake algorithm

Re: [gmx-users] GMX_THREAD_MPI=ON does not exis

2013-11-30 Thread Chandan Choudhury
On Sat, Nov 30, 2013 at 1:22 AM, Mahboobeh Eslami mahboobeh.esl...@yahoo.com wrote: Thank you for your help What command do I use to use 8 cores mdrun -nt 8 -s *.tpr or mpirun -np 8 mdrun_mpi -s *.tpr Chandan Good luck -- Gromacs Users mailing list * Please search the archive at

[gmx-users] Umbrella Sampling tutorial

2013-11-30 Thread shahab shariati
Dear Justin My system contains lipid bilayer + drug + water molecules. I want to calculate Potential of mean force as a function of the distance between the centers of mass of drug and the lipid bilayer. Based on your suggestion I used pull_geometry = position for my case. After the

Re: [gmx-users] Umbrella Sampling tutorial

2013-11-30 Thread Justin Lemkul
On 11/30/13 9:22 AM, shahab shariati wrote: Dear Justin My system contains lipid bilayer + drug + water molecules. I want to calculate Potential of mean force as a function of the distance between the centers of mass of drug and the lipid bilayer. Based on your suggestion I used

Re: [gmx-users] double precision and minimisation error

2013-11-30 Thread Justin Lemkul
On 11/30/13 9:29 AM, jkrie...@mrc-lmb.cam.ac.uk wrote: As has been asked a number of times before, I have seen minimization halt at a low number of steps having converged to machine precision when double precision is not used - does that not mean that double precision is needed at least for

[gmx-users] Charge correction PME

2013-11-30 Thread Benrezkallah Djamila
Dear gmx_users, My question is about the coulomb LR contribution with PME, I can't access to david's original post treating this subject in the mailing list ( http://www.gromacs.org/pipermail/gmx-users/2002-May/001455.html) if it exists, because some links are disabled.If any one can send me the

Re: [gmx-users] Charge correction PME

2013-11-30 Thread Dr. Vitaly Chaban
I might be wrong here, but my expectation is that nowadays you should not do anything explicitly in this regard. The compensating charge is automatically applied. Dr. Vitaly V. Chaban On Sat, Nov 30, 2013 at 5:14 PM, Benrezkallah Djamila benrezkal...@gmail.com wrote: Dear gmx_users, My

Re: [gmx-users] Charge correction PME

2013-11-30 Thread Mark Abraham
... but not necessarily any good! See https://mailman-1.sys.kth.se/pipermail/gromacs.org_gmx-developers/2012-November/006398.html. I have seen Gerrit present some convincing results since then, but they do not seem to be in press, yet. Neutralizing explicitly seems like the right course just

Re: [gmx-users] Charge correction PME

2013-11-30 Thread David van der Spoel
On 2013-11-30 18:01, Mark Abraham wrote: ... but not necessarily any good! See https://mailman-1.sys.kth.se/pipermail/gromacs.org_gmx-developers/2012-November/006398.html. I have seen Gerrit present some convincing results since then, but they do not seem to be in press, yet. Neutralizing

Re: [gmx-users] Charge correction PME

2013-11-30 Thread lloyd riggs
Sorry to but in on the conversation. Im between computers so cant track it down easy, (on my hard drive) but I did find one older publication comparing gromacs solvent (ion/buffers) effects with plasmon resonance calculated affinities, the results of that single paper showed the closer the

[gmx-users] Updating GTX670 PCIE speed from 5GT/s to 8GT/s resulted in about 10% speedup of md_run.

2013-11-30 Thread Henk Neefs
By configuring 8 GT/s PCIE 3.0 for the Nvidia driver, I got a 10% speedup on Gromacs md_run. 45 ns/day - 50 ns/day (1AKI protein). This posting is just informational, my findings on how to do this, so others can possibly also exploit this if they desire so. There is no question that i'm asking

[gmx-users] simulated anealing

2013-11-30 Thread kiana moghaddam
 Dear GMX Users I want to run NVT equilibration and NPT equilibration (after NVT) for DNA-ligand interaction and want to increase temperature gradually i.e. from 0 to 300 K over a 100 ps, but i have some questions about this process: when I use simulated anealing in NVT as following

[gmx-users] simulated anealing

2013-11-30 Thread kiana moghaddam
Dear GMX Users I want to run NVT equilibration and NPT equilibration (after NVT) for DNA-ligand interaction and want to increase temperature gradually i.e. from 0 to 300 K over a 100 ps, but i have some questions about this process: when I use simulated anealing in NVT as following annealing_time