Re: [gmx-users] membrane with OPLS force field

2008-08-06 Thread Justin A. Lemkul
Volker Wirth wrote: Hi Justin, thanks a lot for your response! Of course my mail was a bit "provocative", as I know that combination methods are state of the art, used in many publications and leading to reasonable results. (time scale eight months). Combining different force fields (Berger/

Re: [gmx-users] membrane with OPLS force field

2008-08-06 Thread Volker Wirth
Hi Justin, thanks a lot for your response! Of course my mail was a bit "provocative", as I know that combination methods are state of the art, used in many publications and leading to reasonable results. >> (time scale eight months). Combining different force fields >> (Berger/GROMOS, Berger/OPLS

Re: [gmx-users] membrane with OPLS force field

2008-08-06 Thread Justin A. Lemkul
Volker Wirth wrote: standard acyl chain parameters fail when they get too long. I think there ref. for that is a Berendsen paper on hexadecane simulations, but I could be wrong there. In any event, 'protein' parameters do not appear to transfer directly to long acyl chains in a simple way and t

Re: [gmx-users] membrane with OPLS force field

2008-08-06 Thread Volker Wirth
> standard acyl chain parameters fail when they get too long. I think there > ref. for that is a Berendsen paper on hexadecane simulations, but I could be > wrong there. In any event, 'protein' parameters do not appear to > transfer directly to long acyl chains in a simple way and therefore your >

RE: [gmx-users] membrane with OPLS force field

2008-08-05 Thread Rebeca García Fandiño
Ok, thank you very much. However, with this combination I am not using all atoms for the lipds, if I am right and my intention was using all atoms both for the protein and the membrane. Thank you very much for your help. Best wishes, Rebeca García.> Date: Tue, 5 Aug 2008 09:44:17 -0400> From: [E

Re: [gmx-users] membrane with OPLS force field

2008-08-05 Thread Justin A. Lemkul
Rebeca García Fandiño wrote: Hello, I would like to simulate a membrane + protein system using the OPLS force field for both, the protein and the membrane. I have looked for a previous equilibrated membrane simulated using the OPLS force field, but I did not find it. Please, does anybody kno