[gmx-users] What is gbsa.itp in oplsaa of gmx4.5.5?

2012-09-02 Thread Wu Chaofu
Dear gmxers, I am puzzling about the gbsa.itp file as listed below. What does each item mean? Could you please explain it? ;atype sar st pi gbr hct opls_102 0.16 1 1.215 0.1625 0.79 ; N (RNH3+) Yours sincerely, Chaofu Wu -- gmx-users mailing list

[gmx-users] g_sas doubt -reg

2012-09-02 Thread venkatesh s
Dear Sir / Madam, I want run Solvent accessible surface area in gromacs,i aware about g_sas is there but for selecting group little bit confusing Reading frame 0 time0.000 Select a group for calculation of surface and a group for output: Group 0 (

[gmx-users] Re: Turning off electrostatics between groups using custom tables?

2012-09-02 Thread Smitty
> 1) That .mdp applies different tables to K-K, protein-protein and all > other interactions, which isn't what you've said you've done. > 3) Your life will be simpler if you use energygrp_table only for the > group-group interactions you want to change, and leave the default > interactions nor

Re: [gmx-users] g_sas doubt -reg

2012-09-02 Thread Justin Lemkul
On 9/2/12 2:10 PM, venkatesh s wrote: Dear Sir / Madam, I want run Solvent accessible surface area in gromacs,i aware about g_sas is there but for selecting group little bit confusing Reading frame 0 time0.000 Select a group for calculation of surface and

Re: [gmx-users] What is gbsa.itp in oplsaa of gmx4.5.5?

2012-09-02 Thread Justin Lemkul
On 9/2/12 5:14 AM, Wu Chaofu wrote: Dear gmxers, I am puzzling about the gbsa.itp file as listed below. What does each item mean? Could you please explain it? ;atype sar st pi gbr hct opls_102 0.16 1 1.215 0.1625 0.79 ; N (RNH3+) Manual sectio

Re: [gmx-users] au virtual site

2012-09-02 Thread Justin Lemkul
On 9/1/12 3:38 PM, fatemeh ramezani wrote: Dear gromacs users I want to simulate gold nanoparticle by golp force field that needs to determine virtual sites for Au atoms. I read gromacs manual section 5.2.2 and 4.7 but it is not clear that how can I do it and .also I read virtual site tuto

Re: [gmx-users] Hydrogen bond breaking process

2012-09-02 Thread Justin Lemkul
On 8/31/12 10:43 PM, Rajiv Gandhi wrote: Can you tell me "how to predict the Hydrogen bond breaking process (For example Fe-CO hydrogen bond broken in Myoglobin at 100 ps) through MD simulation? There is no hydrogen bonding in a Fe-CO interaction. That is a coordinate covalent bond. If yo

Re: [gmx-users] Hydrogen bond breaking process

2012-09-02 Thread Rajiv Gandhi
Could you tell me how can i perform for coordinate covalent bond breaking and forming between Fe-CO in myoglobin. I guess, it has been already done by some groups. If possible can you send me journals related to this. Thanks. On Mon, Sep 3, 2012 at 8:55 AM, Justin Lemkul wrote: > > > On 8/31/12

Re: [gmx-users] Hydrogen bond breaking process

2012-09-02 Thread Justin Lemkul
On 9/2/12 9:42 PM, Rajiv Gandhi wrote: Could you tell me how can i perform for coordinate covalent bond breaking and forming between Fe-CO in myoglobin. I guess, it has been already done by some groups. If possible can you send me journals related to this. You can't break and form bonds in cl

Re: [gmx-users] Hydrogen bond breaking process

2012-09-02 Thread Peter C. Lai
Well there is always ReaxFF. You'd still have to use QM/MM to parameterize the various states though. On 2012-09-02 09:48:25PM -0400, Justin Lemkul wrote: > > > On 9/2/12 9:42 PM, Rajiv Gandhi wrote: > > Could you tell me how can i perform for coordinate covalent bond breaking > > and forming b

Re: [gmx-users] Hydrogen bond breaking process

2012-09-02 Thread Rajiv Gandhi
Is there any publication regarding this Fe-CO covalent bond breaking ? Actually in experimental techniques, the bond between Fe-CO in myoglobin gets broken in100 ps time scale. Is't possible to do this process by QM/MM methods or ReaxFF? Please need an advice. I haven't have any prior knowledge on

[gmx-users] g_mindist - reg

2012-09-02 Thread Raj
hi all, I would like to measure the hydrophobic interaction of the ligand against the protein during the simulation . From the forum I learnt g_mindist will be the better tool. But when i used the command g_mindist -f traj.xtc -s topol.tpr -n index.ndx -on numcont.xvg -group and selected protein

[gmx-users] au virtual atom

2012-09-02 Thread fatemeh ramezani
  Thanks for your response, but I've read the manual. What I realized is that, for example, I should consider for every two, three or … atoms, a virtual atom. Here are some questions:  1 - Does not important consider which atoms together? or How much is the angle between atoms?  2 -Does I need t