Chanchal wrote:
Hi All,
I am a novice in gromacs. I want to study sugar/membrane interaction and I want to use gromos96 45a3 ff. At first I am planning to simulate dopc bilayer + water. I downloaded the pdb file of dopc from the site http://www.bioinf.uni-sb.de/RB/ . Then I typed pdb2gmx_d -f dopc.pdb and choose gromos96 45a3 force field. But I got the error "Residue 'OLE' not found in residue topology database". How can I fix the error?

This happens because pdb2gmx is not magic.  See here:

http://oldwiki.gromacs.org/index.php/Errors#Residue_.27XXX.27_not_found_in_residue_topology_database

The website you reference provides suitable topologies for this type of simulation, making pdb2gmx unnecessary.

-Justin

Thanks
Chanchal


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--
========================================

Justin A. Lemkul
Ph.D. Candidate
ICTAS Doctoral Scholar
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080
http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin

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