Re: [gmx-users] g_mindist doubt

2011-09-21 Thread Mark Abraham
On 22/09/2011 4:43 PM, Tsjerk Wassenaar wrote: Hi Aiswarya, What did you do, what did you get, what did you expect and what is your hunch regarding the difference between your result and your expectation? And have you checked out g_mindist -h? Mark Tsjerk On Thu, Sep 22, 2011 at 8:21 AM,

Re: [gmx-users] g_mindist doubt

2011-09-21 Thread Tsjerk Wassenaar
Hi Aiswarya, What did you do, what did you get, what did you expect and what is your hunch regarding the difference between your result and your expectation? Tsjerk On Thu, Sep 22, 2011 at 8:21 AM, aiswarya pawar wrote: > Hi users, > > The g_mindist gives the minimum distance between the atoms

[gmx-users] g_mindist doubt

2011-09-21 Thread aiswarya pawar
Hi users, The g_mindist gives the minimum distance between the atoms other than the actual distance. Thanks -- gmx-users mailing listgmx-users@gromacs.org http://lists.gromacs.org/mailman/listinfo/gmx-users Please search the archive at http://www.gromacs.org/Support/Mailing_Lists/Search bef

Re: [gmx-users] MD with membrane protein

2011-09-21 Thread lina
On Thu, Sep 22, 2011 at 11:34 AM, elisa carli wrote: > Dear All > > I'd like to perfom a MD simulation on a membrane protein using DLPC or DPPC > system > I've downloaded the API package from this link > http://www.gromacs.org/Downloads/User_contributions/Molecule_topologies > > DPPC.zip and DLPC.

[gmx-users] MD with membrane protein

2011-09-21 Thread elisa carli
Dear All I'd like to perfom a MD simulation on a membrane protein using DLPC or DPPC system I've downloaded the API package from this link http://www.gromacs.org/Downloads/User_contributions/Molecule_topologies DPPC.zip and DLPC.zip by schiu How can I use them? Where can I get a tutorial or comm

[gmx-users] Information baout DPCC by schiu

2011-09-21 Thread elisa carli
Dear All I'd like to perfom a MD simulation on a membrane protein using DLPC or DPPC system I've downloaded the API package from this link http://www.gromacs.org/Downloads/User_contributions/Molecule_topologies DPPC.zip and DLPC.zip by schiu How can I use them? Where can I get a tutorial or comm

Re: [gmx-users] error while install GMX4.5.5

2011-09-21 Thread Roland Schulz
On Wed, Sep 21, 2011 at 9:01 PM, Mark Abraham wrote: > On 21/09/2011 7:27 PM, zhongjin wrote: > > Dear GMX users: > While I am installing gmx4.5.5, an error occured after "make" command : > cc -O3 -fomit-frame-pointer -finline-functions -Wall -Wno-unused -msse2 > -funroll-all-loops -std=gnu99 -

Re: [gmx-users] Replex in REMD

2011-09-21 Thread Mark Abraham
On 20/09/2011 9:06 AM, César Ávila wrote: Dear all, I am running REMD simulations in gromacs. Taking advantage of vsites I have set the timestep to 5 fs. In the mdp file I have adjusted the energy and frames to be written every 1000 steps (5 ps). While running the simulations I have also selec

Re: [gmx-users] error while install GMX4.5.5

2011-09-21 Thread Mark Abraham
On 21/09/2011 7:27 PM, zhongjin wrote: Dear GMX users: While I am installing gmx4.5.5, an error occured after "make" command : cc -O3 -fomit-frame-pointer -finline-functions -Wall -Wno-unused -msse2 -funroll-all-loops -std=gnu99 -pthread -I./include -o .libs/grompp grompp.o -L/home/hzj1000/sof

Re: [gmx-users] problem in compiling GMX with MPI

2011-09-21 Thread Mark Abraham
On 21/09/2011 7:59 PM, Jinan Niu wrote: Hi, everyone: when I compiled GMX4.5.5, I encountered a problem and failed many times, SOS! Below is my config.log: More useful would be the information that you've been following the online installation guide, and what your configure line was. As it

Re: [gmx-users] particle decomp crashes while domain decomp does not

2011-09-21 Thread Mark Abraham
On 22/09/2011 8:45 AM, Florian Altvater wrote: Hi, I don't know if my question somehow got lost, or if I forgot to provide some necessary information. Anyway it would be of great help to me, if someone could tell me her/his opinion on the problem. I need to use particle decomposition as I want to

Re: [gmx-users] sd integrator

2011-09-21 Thread Mark Abraham
On 22/09/2011 9:57 AM, Sai Pooja wrote: But is the effect of varying ld_seed.. can that make different trajectories stochastic? Any single MD or SD trajectory is literally stochastic. Either can start from the same point with respectively different ld_seed or gen_seed and diverge. Mark O

Re: [gmx-users] sd integrator

2011-09-21 Thread Sai Pooja
But is the effect of varying ld_seed.. can that make different trajectories stochastic? On Wed, Sep 21, 2011 at 7:40 PM, Mark Abraham wrote: > On 22/09/2011 6:21 AM, Sai Pooja wrote: >> >> Hi, >> >> The sd integrator is described in the manual as follows: >> sd >> An accurate leap-frog stochast

Re: [gmx-users] sd integrator

2011-09-21 Thread Mark Abraham
On 22/09/2011 6:21 AM, Sai Pooja wrote: Hi, The sd integrator is described in the manual as follows: sd An accurate leap-frog stochastic dynamics integrator. Four Gaussian random number are required per integration step per degree of freedom. With constraints, coordinates needs to be constrained

Re: [gmx-users] particle decomp crashes while domain decomp does not

2011-09-21 Thread Florian Altvater
Hi, I don't know if my question somehow got lost, or if I forgot to provide some necessary information. Anyway it would be of great help to me, if someone could tell me her/his opinion on the problem. I need to use particle decomposition as I want to introduce distance restraints from 2-6nm, which

Re: [gmx-users] meaning of minus potential and buried surface area

2011-09-21 Thread Justin A. Lemkul
ahmet yıldırım wrote: Dear users, 1.) During the simulation the mean potential energy is minus (-) value. What does this mean? Why minus? Net attraction. 2.) let's say, Interface/Buried Surace Area (ISA) between protein and ligand was calculated and hydrophobic ISA obtained greater than

[gmx-users] sd integrator

2011-09-21 Thread Sai Pooja
Hi, The sd integrator is described in the manual as follows: sd An accurate leap-frog stochastic dynamics integrator. Four Gaussian random number are required per integration step per degree of freedom. With constraints, coordinates needs to be constrained twice per integration step. Depending on

[gmx-users] meaning of minus potential and buried surface area

2011-09-21 Thread ahmet yıldırım
Dear users, 1.) During the simulation the mean potential energy is minus (-) value. What does this mean? Why minus? 2.) let's say, Interface/Buried Surace Area (ISA) between protein and ligand was calculated and hydrophobic ISA obtained greater than hydrophilic ISA. What does this mean? No one is

[gmx-users] question about position restraint in martini coarse-grained

2011-09-21 Thread mohammad agha
Dear Gromacs Users, > > > >I want to simulate 150 surfactant molecules in the water by MARTINI >Coarse-Grained force field, and I have several questions please: >1- I defined 2 groups in index.ndx file named "surfactants" and "w_ion_ wf" that second group is consist of water, a

Re: [gmx-users] what difference between RMSF and RMDEV

2011-09-21 Thread Justin A. Lemkul
ahmet yıldırım wrote: Dear users, g_rmsf -s run.tpr -f run.xtc -od rmsdev.xvg -o rmsf.xvg -res With the option -od the root mean square deviation with respect to the reference structure is calculated. Then, RMSDEV is the RMSD per residue (the root mean square deviation with respect to the

[gmx-users] what difference between RMSF and RMDEV

2011-09-21 Thread ahmet yıldırım
Dear users, g_rmsf -s run.tpr -f run.xtc -od rmsdev.xvg -o rmsf.xvg -res With the option -od the root mean square deviation with respect to the reference structure is calculated. Then, RMSDEV is the RMSD per residue (the root mean square deviation with respect to the reference structure is calcul

[gmx-users] Re: GROMACS @ Facebook

2011-09-21 Thread Dr. Vitaly V. Chaban
Cool... :-) > Hi, > > for your entertainment and as a reach-out to younger scientists GROMACS > is now on Facebook. Please look us up at: > > http://www.facebook.com/pages/GROMACS/257453660934850 > > We're looking forward to your comments. > > Cheers, > -- > David van der Spoel, Ph.D., Professor o

Re: [gmx-users] Temperature for different groups

2011-09-21 Thread Mark Abraham
On 22/09/2011 1:22 AM, Marcelino Arciniega Castro wrote: Hi everybody, I have a small question. I read somewhere that for a better performance on coupling the Temperature of a system is better do it by dividing the system in groups, let say protein and solvent, and coupling them to the same ta

[gmx-users] Temperature for different groups

2011-09-21 Thread Marcelino Arciniega Castro
Hi everybody, I have a small question. I read somewhere that for a better performance on coupling the Temperature of a system is better do it by dividing the system in groups, let say protein and solvent, and coupling them to the same target temperature. Is it remaining true for other integrato

Re: [gmx-users] Error mesage

2011-09-21 Thread Justin A. Lemkul
Tanos Franca wrote: Dear gmx users, Does someone know how to deal with the error mesage bellow ? The DD geometry depends upon the configuration of the system, constraints applied, cutoffs, and any other special restraints (like distance restraints) that may be present. The error message su

[gmx-users] Error mesage

2011-09-21 Thread Tanos Franca
Dear gmx users, Does someone know how to deal with the error mesage bellow ? With my best regards, Tanos C. C. Franca. Program mdrun, VERSION 4.5.4 Source code file: domdec_con.c, line: 693 Fatal error: DD cell 2 1 0 could only obtain 273 of the 275 atoms that are connected via constraints from

[gmx-users] GROMACS @ Facebook

2011-09-21 Thread David van der Spoel
Hi, for your entertainment and as a reach-out to younger scientists GROMACS is now on Facebook. Please look us up at: http://www.facebook.com/pages/GROMACS/257453660934850 We're looking forward to your comments. Cheers, -- David van der Spoel, Ph.D., Professor of Biology Dept. of Cell & Mole

[gmx-users] question about martini coarse-grained

2011-09-21 Thread mohammad agha
Dear Gromacs Users, > > > >I want to simulate 150 surfactant molecules in the water by MARTINI >Coarse-Grained force field, and I have several questions please: >1- I defined 2 groups in index.ndx file named "surfactants" and "w_ion_ wf" that second group is consist of water, a

[gmx-users] question about martini coarse-grained

2011-09-21 Thread mohammad agha
Dear Gromacs Users, > > > >I want to simulate 150 surfactant molecules in the water by MARTINI >Coarse-Grained force field, and I have several questions please: >1- I defined 2 groups in index.ndx file named "surfactants" and "w_ion_ wf" that second group is consist of water, a

[gmx-users] New maintenance release: 4.5.5

2011-09-21 Thread Rossen Apostolov
Dear Gromacs community, A new maintenance release of Gromacs is available for download at ftp://ftp.gromacs.org/pub/gromacs/gromacs-4.5.5.tar.gz. Some notable updates in this release: * Improved pdb2gmx -chainsep option and reintroduced the -merge option. * Fixed mdrun file appending trunca

[gmx-users] (no subject)

2011-09-21 Thread mohammad agha
-- gmx-users mailing listgmx-users@gromacs.org http://lists.gromacs.org/mailman/listinfo/gmx-users Please search the archive at http://www.gromacs.org/Support/Mailing_Lists/Search before posting! Please don't post (un)subscribe requests to the list. Use the www interface or send it to gmx-u

Re: [gmx-users] Dimer simulation problem

2011-09-21 Thread Kavyashree M
Thanks. On Wed, Sep 21, 2011 at 5:07 PM, Justin A. Lemkul wrote: > > > Kavyashree M wrote: > >> Dear users, >> >> I was trying to simulate a protein dimer covalently bond with >> a disulphide bond (230+230 aa long). I used usual protocol >> as used for simulation of a monomeric protein, using gr

Re: [gmx-users] Dimer simulation problem

2011-09-21 Thread Justin A. Lemkul
Kavyashree M wrote: Dear users, I was trying to simulate a protein dimer covalently bond with a disulphide bond (230+230 aa long). I used usual protocol as used for simulation of a monomeric protein, using gromacs- 4.5.3, dodecahedron box, tip4p water model and protein to box distance of 1 (-d

Re: [gmx-users] problem with lipid membrane

2011-09-21 Thread Justin A. Lemkul
Parul tew wrote: Thanks for the reply Justin, > In theory, that should work. Please post the entirety of your .mdp file. Have you done any prior equilibration, or have you moved straight into annealing? I would suggest a restrained NVT before applying NPT or annealin

Re: [gmx-users] problem with pdb2gmx

2011-09-21 Thread Justin A. Lemkul
Saurav Saha wrote: Dear Everyone, I am Saurav B. Saha from India. I am newbie to gromacs. I am interested in using gromacs for ligand receptor interaction. But when i started my first step by using "pdb2gmx -f structure.pdb -water tip3p" i am getting fatal error (Fatal error:Atom CD not fou

[gmx-users] Identifying representative structures from a g_sham

2011-09-21 Thread Bailey A.
Hi, Thanks for this - very helpful and I think I've been able to identify the structures I'm interested in. Incidentally, I saw the earlier correspondence about plotting the axes using g_sham. I'm having similar difficulties - I can generate axes, based on the data range using -xmax and -xmin

[gmx-users] Dimer simulation problem

2011-09-21 Thread Kavyashree M
Dear users, I was trying to simulate a protein dimer covalently bond with a disulphide bond (230+230 aa long). I used usual protocol as used for simulation of a monomeric protein, using gromacs- 4.5.3, dodecahedron box, tip4p water model and protein to box distance of 1 (-d in editconf). In the mi

[gmx-users] problem with pdb2gmx

2011-09-21 Thread Saurav Saha
Dear Everyone, I am Saurav B. Saha from India. I am newbie to gromacs. I am interested in using gromacs for ligand receptor interaction. But when i started my first step by using "pdb2gmx -f structure.pdb -water tip3p" i am getting fatal error (Fatal error:Atom CD not found in residue seq.nr. 7

[gmx-users] problem in compiling GMX with MPI

2011-09-21 Thread Jinan Niu
Hi, everyone: when I compiled GMX4.5.5, I encountered a problem and failed many times, SOS! Below is my config.log: /usr/bin/uname -p = unknown /bin/uname -X = unknown /bin/arch = x86_64 /usr/bin/arch -k = unknown /usr/convex/getsysinfo = unknown /usr/bin/hostinfo =

[gmx-users] error while install GMX4.5.5

2011-09-21 Thread zhongjin
Dear GMX users: While I am installing gmx4.5.5, an error occured after "make" command : cc -O3 -fomit-frame-pointer -finline-functions -Wall -Wno-unused -msse2 -funroll-all-loops -std=gnu99 -pthread -I./include -o .libs/grompp grompp.o  -L/home/hzj1000/software/fftw/lib ./.libs/libgmxpreprocess.s