Re: [gmx-users] Regarding pdb2gmx and mdrun

2017-07-18 Thread Justin Lemkul
On 7/18/17 8:15 AM, S M Bargeen Turzo wrote: Hey I have been trying to convert S100A8A9(has two chains) to .gro but after energy minimization I am not getting an integer for the total charge of the system. What is the magnitude of this non-integer charge? Did you do anything funny during

[gmx-users] Regarding pdb2gmx and mdrun

2017-07-18 Thread S M Bargeen Turzo
Hey I have been trying to convert S100A8A9(has two chains) to .gro but after energy minimization I am not getting an integer for the total charge of the system. Secondly when I try to do molecular dynamics simulation using these parameters: ; 0.5 ps NVT production with Langevin thermostat and

Re: [gmx-users] regarding pdb2gmx

2015-05-31 Thread soumadwip ghosh
Thank you very much for your help Justin. I really appreciate I would like to bother you for one last time ( as of now ;). So, if I am dealing with a non-trivial molecule like CNT or some polyelectrolyte and I mainly intend to demonstrate the non-bonding interactions with some nucleic acids (say

Re: [gmx-users] regarding pdb2gmx

2015-05-31 Thread Justin Lemkul
On 5/31/15 8:37 AM, soumadwip ghosh wrote: Thank you very much for your help Justin. I really appreciate I would like to bother you for one last time ( as of now ;). So, if I am dealing with a non-trivial molecule like CNT or some polyelectrolyte and I mainly intend to demonstrate the

[gmx-users] regarding pdb2gmx

2015-05-30 Thread soumadwip ghosh
Hi all, I have a general query about the basic functioning of pdb2gmx. I recently observed that when I take a PDB file for a DNA molecule and build its topology via pdb2gmx (in CHARMM27 ff) it automatically builds it without any hitches. If I look at the .itp file made for the DNA chain it

Re: [gmx-users] regarding pdb2gmx

2015-05-30 Thread Justin Lemkul
On 5/30/15 6:40 AM, soumadwip ghosh wrote: Hi all, I have a general query about the basic functioning of pdb2gmx. I recently observed that when I take a PDB file for a DNA molecule and build its topology via pdb2gmx (in CHARMM27 ff) it automatically builds it without any hitches. If I

Re: [gmx-users] regarding pdb2gmx

2015-05-30 Thread soumadwip ghosh
Thanks Justin for your insights. So when I am making the topology of DNA via ppdb2gmx using CHARMM, the parameters in the .itp files are not adequate and I should place them manually everytime I make a molecule topology with pdb2gmx? In some of my previous works actually the DNA molecule gave

Re: [gmx-users] regarding pdb2gmx

2015-05-30 Thread Justin Lemkul
On 5/30/15 10:24 AM, soumadwip ghosh wrote: Thanks Justin for your insights. So when I am making the topology of DNA via ppdb2gmx using CHARMM, the parameters in the .itp files are not adequate and I should place them manually everytime I make a molecule topology with pdb2gmx? In some of my