[gmx-users] Docking validation

2014-03-09 Thread Mostafa Javaheri
Dear Justin I docked a ligand to a hetrodimer protein, I know the approximate position of the ligand but I don't know whether or not the docked ligand is relaxed in the binding site or is it taken the proper orientation? I run the ligand-protein complex for 5ns MD by using charmm force field and

[gmx-users] tip3p

2014-03-09 Thread Chetan Mahajan
Hi All I have tip3p water potential parameters from 3 different sources and they differ quite substantially. I tried finding answer on the web or manual, but no success. Following lists all the three sources and bond potential force constant (kb) value, in bracket as an example of how values

Re: [gmx-users] tip3p

2014-03-09 Thread Mark Abraham
On Sun, Mar 9, 2014 at 1:00 PM, Chetan Mahajan chetanv...@gmail.com wrote: Hi All I have tip3p water potential parameters from 3 different sources and they differ quite substantially. I tried finding answer on the web or manual, but no success. Following lists all the three sources and bond

Re: [gmx-users] CHARMM36 force field available for GROMACS

2014-03-09 Thread Justin Lemkul
On 3/9/14, 6:28 AM, jim wrote: I'm confused about the existence of H5'1 and H5'2 atom names in the RNA nucleotides (in merge.rtp). I thought all atom names followed the CHARMM 36 atom name convention. Particularly, why do atoms H2' and H2'' correspond to the latter, while H5'1 and H5'2 carry

Re: [gmx-users] tip3p

2014-03-09 Thread Chetan Mahajan
Hi Mark, Thanks for the reply. Now, 1983 article by Jorgensen gives parameters for rigid tip3p, whereas I am seeking that for flexible tip3p. Force constant is not mentioned in 1983 article by Jorgensen. The article that I cited in #1 point below gives these parameters for modified tip3p. I do

Re: [gmx-users] CHARMM36 force field available for GROMACS

2014-03-09 Thread Jim
Thanks for the clarification. *Bonds involving H5' and H5'' in RNA residues should indeed be changed to the H5'1 and H5'2 nomenclature.* Even though H5' and H5'' are connected to the same atom, what would be the problem to keep these H atom names H5' and H5'' instead of changing them to H5'1

Re: [gmx-users] CHARMM36 force field available for GROMACS

2014-03-09 Thread Jim
Thanks, but I'll have to ask you something again. :) On Sun, Mar 9, 2014 at 5:00 PM, Justin Lemkul jalem...@vt.edu wrote: On 3/9/14, 7:23 PM, Jim wrote: Thanks for the clarification. *Bonds involving H5' and H5'' in RNA residues should indeed be changed to the H5'1 and H5'2