Hi, Justin, Thank you very much for your help.
It seems that genbox will need really huge memory even with thousands of molecules. If we want to to further to tens or hundreds of thousands molecules, do we need some cluster to run genbox in parallel? Best Regards, Kai > > Message: 3 > Date: Tue, 29 May 2012 08:50:06 -0400 > From: "Justin A. Lemkul" <jalem...@vt.edu> > Subject: Re: [gmx-users] How to generate the initial coordinates file? > To: Discussion list for GROMACS users <gmx-users@gromacs.org> > Message-ID: <4fc4c5fe.9060...@vt.edu> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > > > On 5/29/12 8:46 AM, Bao Kai wrote: >> Hi, all, >> >> I am new to Gromacs and MD. I just went through a few tutorials on >> Gromacs quickly. I have a question now. >> >> I know the structure of molecule A and B, such as the atoms >> compositions and the relative position of the atoms and the charge. >> >> Now, I want to use 500 A and 100 B to do the simulation. I want to >> know how I can get the initial coordinate file or how I should start. >> >> It seems all the tutorials use either one big protein molecule the add >> some water or the coordinate files have been ready. >> >> Thank you very much. > > You will need to obtain coordinate files of both of your molecules using some > external software. Several suggestions are provided here, though there are > others, as well: > > http://www.gromacs.org/Documentation/File_Formats/Coordinate_File#Sources > > You will need to obtain or create topologies for each of these. > > To construct the system, use genbox in conjunction with the -ci -nmol flags, > as > suggested here: > > http://www.gromacs.org/Documentation/How-tos/Mixed_Solvents > > -Justin > > -- > ======================================== > > Justin A. Lemkul, Ph.D. > Research Scientist > Department of Biochemistry > Virginia Tech > Blacksburg, VA > jalemkul[at]vt.edu | (540) 231-9080 > http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin > > ======================================== > > -- gmx-users mailing list gmx-users@gromacs.org http://lists.gromacs.org/mailman/listinfo/gmx-users Please search the archive at http://www.gromacs.org/Support/Mailing_Lists/Search before posting! Please don't post (un)subscribe requests to the list. Use the www interface or send it to gmx-users-requ...@gromacs.org. Can't post? Read http://www.gromacs.org/Support/Mailing_Lists
