[gmx-users] problem with nvt equilibration

2012-02-06 Thread Anushree Tripathi
Inspite of having DPPC in index file,when I run the command ( i.e., grompp -f nvt.mdp -c em.gro -p topol.top -o nvt.tpr ),I am getting the error: Group DPPC not found in indexfile. Maybe you have non-default goups in your .mdp file, while not using the '-n' option of grompp. In that case use the

[gmx-users] Reg fatal error

2012-02-06 Thread RAMYA NAGA
Dear friends, iam doing protein-ligand dynamics..iam getting the error like this Group Protein_JZ4 not found in index file. Group names must match either [moleculetype] names or custom index group names,in which case you must supply an index file to the '-n' option of grompp. please help me in

Re: [gmx-users] problem with nvt equilibration

2012-02-06 Thread Mark Abraham
On 6/02/2012 8:28 PM, Anushree Tripathi wrote: Inspite of having DPPC in index file,when I run the command ( i.e., grompp -f nvt.mdp -c em.gro -p topol.top -o nvt.tpr ),I am getting the error: Group DPPC not found in indexfile. Maybe you have non-default goups in your .mdp file, while not

Re: [gmx-users] Reg fatal error

2012-02-06 Thread Mark Abraham
On 6/02/2012 8:31 PM, RAMYA NAGA wrote: Dear friends, iam doing protein-ligand dynamics..iam getting the error like this Group Protein_JZ4 not found in index file. Group names must match either [moleculetype] names or custom index group names,in which case you must supply an index file to the

[gmx-users] van der waals interaction

2012-02-06 Thread Sajad Ahrari
Dear users, Is there any way to find out About Van Der Waals interactions between two group of residues, by Gromacs? regards, sajad -- gmx-users mailing listgmx-users@gromacs.org http://lists.gromacs.org/mailman/listinfo/gmx-users Please search the archive at

Re: [gmx-users] problem with nvt equilibration

2012-02-06 Thread Anushree Tripathi
where should I use -n option in the command (i.e., grompp -f nvt.mdp -c em.gro -p topol.top -o nvt.tpr).Please tell me. On Mon, Feb 6, 2012 at 4:58 PM, Mark Abraham mark.abra...@anu.edu.auwrote: On 6/02/2012 8:28 PM, Anushree Tripathi wrote: Inspite of having DPPC in index file,when I run the

Re: [gmx-users] problem with nvt equilibration

2012-02-06 Thread Justin A. Lemkul
Anushree Tripathi wrote: where should I use -n option in the command (i.e., grompp -f nvt.mdp -c em.gro -p topol.top -o nvt.tpr).Please tell me. I would suggest you refer to grompp -h and/or go through some basic tutorial material so that you can get a feel for command line options and

Re: [gmx-users] Npt equilibration of the membrane-mimicking CCl4 layer

2012-02-06 Thread Justin A. Lemkul
James Starlight wrote: Justin, I've built my system in accordance to the first way from your Biphgastic system tutorial. I've defined system with slight biger ( on 1 nm in each dimension) dimensions that I needed and place maximym CCl4 molecules in that box by genbox -ci ccl4.gro -nmol

[gmx-users] amber-lipid

2012-02-06 Thread Алексей Раевский
Hi Is it possible to use amber forcefield with lipid parameters like it was done with gmx in KALP-15 in DPPC tutorial? I have to use amber forcefield as it is neccessary for parametrization of my ligand and its stecking interactions. Thank you very much -- Nemo me impune lacessit --

Re: [gmx-users] problem with nvt equilibration

2012-02-06 Thread Anushree Tripathi
Will you please send me the basic tutorial in which I can find how to use -n option in grompp -f nvt.mdp -c em.gro -p topol.top -o nvt.tpr command. On Mon, Feb 6, 2012 at 5:17 PM, Justin A. Lemkul jalem...@vt.edu wrote: Anushree Tripathi wrote: where should I use -n option in the command

Re: [gmx-users] problem with nvt equilibration

2012-02-06 Thread Mark Abraham
On 6/02/2012 11:09 PM, Anushree Tripathi wrote: Will you please send me the basic tutorial in which I can find how to use -n option in grompp -f nvt.mdp -c em.gro -p topol.top -o nvt.tpr command. All the tutorials provide examples of using the general syntax command -x value -y file.ext

Re: [gmx-users] amber-lipid

2012-02-06 Thread Justin A. Lemkul
Алексей Раевский wrote: Hi Is it possible to use amber forcefield with lipid parameters like it was done with gmx in KALP-15 in DPPC tutorial? I have to use amber forcefield as it is neccessary for parametrization of my ligand and its stecking interactions. If you can find suitable

Re: [gmx-users] Index file

2012-02-06 Thread Justin A. Lemkul
Steven Neumann wrote: Dear Gmx Users, I want to create index file of my protein residues - each group corresponds to different residue. Is there any option in make_ndx which will allow me to do it automatically instead of typing: r 180, r 181, ... r 550? splitres 1 That will split

[gmx-users] a question about membrane simulation

2012-02-06 Thread Albert
Dear: I am reading a membrane protein simulation paper by GROMACS which published on PLOS Computational Biology ( http://www.ploscompbiol.org/article/info%3Adoi%2F10.1371%2Fjournal.pcbi.1001053 ), titled 'Predicting Novel Binding Modes of Agonists to β Adrenergic Receptors Using All-Atom

Re: [gmx-users] amber-lipid

2012-02-06 Thread Steven Neumann
Thank you!!! On Mon, Feb 6, 2012 at 1:04 PM, Justin A. Lemkul jalem...@vt.edu wrote: Алексей Раевский wrote: Hi Is it possible to use amber forcefield with lipid parameters like it was done with gmx in KALP-15 in DPPC tutorial? I have to use amber forcefield as it is neccessary for

[gmx-users] amber-lipid

2012-02-06 Thread ABEL Stephane 175950
/20120206/e6fab5df/attachment.html -- -- gmx-users mailing list gmx-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! End of gmx-users Digest, Vol 94

Re: [gmx-users] van der waals interaction

2012-02-06 Thread Justin A. Lemkul
Sajad Ahrari wrote: Dear users, Is there any way to find out About Van Der Waals interactions between two group of residues, by Gromacs? You can decompose various nonbonded energy contributions by using suitable energygrps in the .mdp file. Beyond that, you'll have to be a lot more

Re: [gmx-users] umbrella-histogram-windows

2012-02-06 Thread Justin A. Lemkul
parto haghighi wrote: Dear gmx users I am working on an umbrella sampling system.(lipid bilayer+drug). I have used distance I have used lipid as a refrence group and drug as a pull group.in npt_umbrella mdp I have used constraint for refrence group and in md_umbrella I have removed the

[gmx-users] g_rdf and lipid bilayer hydration

2012-02-06 Thread Ioannis Beis
Dear Gromacs users, I have a question related to the use of g_rdf for the calculation of hydration of a lipid bilayer patch. I used g_rdf with -surf flag (I tried both mol and res) and two index groups: the oxygens of waters as first group and the atoms of the headgroups as second group. I

Re: [gmx-users] g_dist

2012-02-06 Thread Justin A. Lemkul
Steven Neumann wrote: Dear gmx Users, Can you please clarify me as I cannot find it anywhere what means the s0 legent in the dist.xvg as an outcome from g_dist? What is stated by |d| ? sx, sy, sz is the vector from two groups obviously. It is the distance. -Justin --

[gmx-users] a question about membrane simulation

2012-02-06 Thread Albert
Dear: I am reading a membrane protein simulation paper by GROMACS which published on PLOS Computational Biology ( http://www.ploscompbiol.org/article/info%3Adoi%2F10.1371%2Fjournal.pcbi.1001053 ), titled 'Predicting Novel Binding Modes of Agonists to β Adrenergic Receptors Using All-Atom

[gmx-users] Using groups in the mdp file

2012-02-06 Thread Ignacio Fernández Galván
Hi all, I have a system with a molecule called ACX plus water (molecules called SOL), but when I try to use ACX as a group name in the .mdp file, grompp says such a group does not exist: --- Program grompp, VERSION 4.5.5 Source code file:

Re: [gmx-users] Using groups in the mdp file

2012-02-06 Thread francesco oteri
Hi Ignacio, You can solve the problem creating an index file through make_ndx. In such a file you need a group called ACX. Then use the index.ndx in grompp. Francesco 2012/2/6, Ignacio Fernández Galván jel...@yahoo.com: Hi all, I have a system with a molecule called ACX plus water (molecules

Re: [gmx-users] How to setup a system of a protein attached to a small molecule?

2012-02-06 Thread Mark Abraham
On 7/02/2012 2:26 AM, Qinghua Liao wrote: Dear GMX users, We are trying to do a simulation of a protein attached to a small molecules, how should I do to setup the system? For the parameters of the small molecule, I got it from ATB sever, however I don't know how to bond the small molecule

Re: [gmx-users] Using groups in the mdp file

2012-02-06 Thread Justin A. Lemkul
francesco oteri wrote: Hi Ignacio, You can solve the problem creating an index file through make_ndx. In such a file you need a group called ACX. Then use the index.ndx in grompp. In principle, an index file is not necessary here, as ACX should be generated as a default group since it is

Re: [gmx-users] Using groups in the mdp file

2012-02-06 Thread Ignacio Fernández Galván
--- On Mon, 6/2/12, Justin A. Lemkul jalem...@vt.edu wrote: Perhaps the OP can provide the original grompp command and whether or not the -n flag was invoked.  An incorrect index file can also give this error, I believe, if it does not contain the desired group. I'm not using an index file.

Re: [gmx-users] a question about membrane simulation

2012-02-06 Thread Peter C. Lai
It also coincides with the 1.5A RMSD change of the active site in those time periods (see figure 2). As to the interpretation of this, maybe you should ask the paper's authors directly? (Since they do not provide any graphs of ligand conformation changes) And yes, I have seen chi changes like

Re: [gmx-users] Using groups in the mdp file

2012-02-06 Thread Justin A. Lemkul
Ignacio Fernández Galván wrote: --- On Mon, 6/2/12, Justin A. Lemkul jalem...@vt.edu wrote: Perhaps the OP can provide the original grompp command and whether or not the -n flag was invoked. An incorrect index file can also give this error, I believe, if it does not contain the desired

[gmx-users] Triple bond

2012-02-06 Thread Tanos Franca
Dear users, We ve been trying unsucessfully to perform some MD simulations with some compounds containing triple bonds using GROMACS. Does someone know how to properly construct the topologies to this kind of bond for GROMACS ? With my best regards, Tanos C. C. Franca. --

RE: [gmx-users] g_rdf and lipid bilayer hydration

2012-02-06 Thread Dallas Warren
Would suggest you check to ensure that your index group and selection is for the atoms you think it actually is, and visually inspect the system at a number of times within the trajectory to see how the atoms are arranged relative to each other (and measure some actual distances, easy to do

RE: [gmx-users] Triple bond

2012-02-06 Thread Dallas Warren
http://lists.gromacs.org/pipermail/gmx-users/2009-July/043186.html Plus there are several others http://www.gromacs.org/Support/Mailing_Lists/Search?q=triple+bond Catch ya, Dr. Dallas Warren Medicinal Chemistry and Drug Action Monash Institute of Pharmaceutical Sciences, Monash University