Hi,<br><br>I just checked with Gromacs 4.5.4 and VMD 1.9:<br><ol><li>Download charmm36.ff.tgz from Gromacs downloads and unpack to appropriate Gromacs installation folder {root}/share/gromacs/top or your working directory.</li>
<li>Open VMD, go to Extensions->Modeling->Membrane builder, choose POPC, force field c36 and membrane size. Generate the membrane.</li><li>Close VMD and issue command: pdb2gmx -f membrane.pdb -ff charmm36 -water tip3p (-o ... -i ... -p ... if you don't want default names).</li>
</ol>Now sky is the limit :) <br><br>Good luck,<br>Christopher<br><br><br><div class="gmail_quote">2011/5/29 albert <span dir="ltr"><<a href="mailto:leuven@yeah.net">leuven@yeah.net</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Dear all:<br><br> I would like to use charmm36 and POPC for membrane protein simulation. and I am wondering where can I download charmm36 pre-pribriumed POPC PDB and topol file for gromacs?<br><br>Thank you very much<br>
Best<br><br>--<br>
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