Re: [gmx-users] Fw: modifying the mutated DNA parameters

2011-12-24 Thread Mark Abraham
On 12/25/2011 6:04 PM, banafsheh mehrazma wrote: Dear Mark; Thank you for your instant reply. You are right, but in my case, there is a residue 8-OxoG (oxidized G). As you know, in all of the force fields in Gromacs package, G,C,A and T are known. In your opinion, what should I do in case of

Re: [gmx-users] Fw: modifying the mutated DNA parameters

2011-12-24 Thread banafsheh mehrazma
Dear Mark; Thank you for your instant reply. You are right, but in my case, there is a residue  8-OxoG  (oxidized G). As you know, in all of the force fields in Gromacs package, G,C,A and T are known. In your opinion, what should I do in case of 8-OxoG, to obtain parameters needed for this new r

Re: [gmx-users] Fw: calculation charges copmatible with GROMOS

2011-12-24 Thread Justin A. Lemkul
Su Nh wrote: Dear all I used PRODRG to build the topology file of a ligand (GROMOS force field). Now I want to calculate the partial charges with Gaussian, but I do not know which basis set and method I have to use to be compatible with GROMOS. Could you please help me? http://pubs.

[gmx-users] Fw: calculation charges copmatible with GROMOS

2011-12-24 Thread Su Nh
Dear all I used PRODRG to build the topology file of a ligand (GROMOS force field). Now I want to calculate the partial charges with Gaussian, but I do not know which basis set and method I have to use to be compatible with GROMOS. Could you please help me? Thanks-- gmx-users mailing li

[gmx-users] Regarding Benzene Simulation

2011-12-24 Thread Ravi Kumar Venkatraman
Dear All, When I try to run Benzene Simulation I am getting following error after the grompp for energy minimization. ERROR 1 [file benz.top, line 115]: No default Proper Dih. types ERROR 2 [file benz.top, line 116]: No default Proper Dih. types ERROR 3 [file benz.top, line 117

[gmx-users] Re: topology file

2011-12-24 Thread David van der Spoel
On 2011-12-24 13:08, Su Nh wrote: Dear Prof. van der Spoe Thank you for your responce. But I want to know if the charges in the topology files, which are built by ATB, are accurate and there is no need to re-calculate them or not? On the oder hand, what is the compatible parameters (basis set and

[gmx-users] how to obtain error bar for plotting?

2011-12-24 Thread leila karami
Dear Mark Thanks for your quick reply. For what parameters I can use g_analyze -av average.xvg -errbar stddev -f *.xvg? Can I use above tool for obtaining error bars for a *.xvg file resulting from g_dist? -- gmx-users mailing listgmx-users@gromacs.org http://lists.gromacs.org/mailman/list

Re: [gmx-users] how to obtain error bar for plotting?

2011-12-24 Thread Mark Abraham
On 12/24/2011 10:40 PM, leila karami wrote: Dear gromacs users I would like to calculate the standard deviation (as the error bar) for rmsd.xvg file. If rmsd.xvg was used in excel software, it gives a graph as rmsd vs time. I want to have a file containing rmsd vs time and error bar relati

Re: [gmx-users] Fw: modifying the mutated DNA parameters

2011-12-24 Thread Mark Abraham
On 12/24/2011 10:41 PM, banafsheh mehrazma wrote: --- On *Sat, 12/24/11, banafsheh mehrazma //* wrote: From: banafsheh mehrazma Subject: To: gmx-users@gromacs.org Date: Saturday, December 24, 2011, 3:39 AM To whom it may concern; I am willing to study a damaged DNA w

[gmx-users] how to obtain error bar for plotting?

2011-12-24 Thread leila karami
Dear gromacs users In the average file, there are 3 columns: first column is time, second is rmsd value. third column is 0. what is third column? best regards. -- gmx-users mailing listgmx-users@gromacs.org http://lists.gromacs.org/mailman/listinfo/gmx-users Please search the archive at

[gmx-users] Fw: modifying the mutated DNA parameters

2011-12-24 Thread banafsheh mehrazma
--- On Sat, 12/24/11, banafsheh mehrazma wrote: From: banafsheh mehrazma Subject: To: gmx-users@gromacs.org Date: Saturday, December 24, 2011, 3:39 AM To whom it may concern; I am willing to study a damaged DNA which has a 8-oxoG as the lesion (the Carbon 8 in guannine is oxidized.).

[gmx-users] how to obtain error bar for plotting?

2011-12-24 Thread leila karami
Dear gromacs users I would like to calculate the standard deviation (as the error bar) for rmsd.xvg file. If rmsd.xvg was used in excel software, it gives a graph as rmsd vs time. I want to have a file containing rmsd vs time and error bar relating to rmsd values such that after plotting by exce

[gmx-users] (no subject)

2011-12-24 Thread banafsheh mehrazma
To whom it may concern; I am willing to study a damaged DNA which has a 8-oxoG as the lesion (the Carbon 8 in guannine is oxidized.). I have the following questions; 1) Should I change the sigma and epsilon parameters in the force field that I want to work on? and how? 2) Should I change the bond

Re: [gmx-users] calculation charges copmatible with GROMOS

2011-12-24 Thread David van der Spoel
On 2011-12-24 12:20, Su Nh wrote: Dear all I used PRODRG to build the topology file of a ligand (GROMOS force field). Now I want to calculate the partial charges with Gaussian, but I do not know whichbasis set and method I have to use to be compatible with GROMOS. Could you please help me? Thanks

[gmx-users] calculation charges copmatible with GROMOS

2011-12-24 Thread Su Nh
Dear all   I used PRODRG to build the topology file of a ligand (GROMOS force field). Now I want to calculate the partial charges with Gaussian, but I do not know which basis set and method I have to use to be compatible with GROMOS. Could you please help me?   Thanks-- gmx-users mailing list

Re: [gmx-users] micelle clustering

2011-12-24 Thread mohammad agha
Thank you very much. Best Regards Sara From: Mark Abraham To: Discussion list for GROMACS users Sent: Saturday, December 24, 2011 1:48 PM Subject: Re: [gmx-users] micelle clustering On 12/24/2011 8:01 PM, mohammad agha wrote: Dear GROMACS users > > >I wa

Re: [gmx-users] Temperature de-coupling in Langevin Dynamics

2011-12-24 Thread Mark Abraham
On 12/24/2011 6:23 PM, Inon Sharony wrote: Good morning! I'm running GMX 4.5.4 using the sd integrator and I'm trying to couple only some of my T-couple groups to thermal reservoirs, i.e. I'd like to have at least one group for which tau_T=0. However, grompp gives me an error saying tau=0 is

Re: [gmx-users] micelle clustering

2011-12-24 Thread Mark Abraham
On 12/24/2011 8:01 PM, mohammad agha wrote: Dear GROMACS users I want to analysis of 2 micelles that are created in one simulation, when I view output of trajectory by vmd or ngmx: ngmx -f md.trr -s md.tpr has been created 2 micelles, then I try to micelle clustering by: 1. |trjconv -f md.xt

[gmx-users] micelle clustering

2011-12-24 Thread mohammad agha
Dear GROMACS users I want to analysis of 2 micelles that are created in one simulation, when I view output of trajectory by vmd or ngmx: ngmx -f md.trr -s md.tpr has been created 2 micelles, then I try to micelle clustering by: 1. trjconv -f md.xtc -o a_cluster.gro -e 0.001 -pbc cluster