Alternatively, you could define your monomers in the relevant ff???.rtp file so that pdb2gmx can build the polymer from residues. You can use PRODRG to give you an idea of what charges you should assign to the atoms. See section 5.5 of the manual for more information.

Luke

Message: 2
Date: Tue, 6 Mar 2007 01:53:07 -0500
From: "Karthikeyan Pasupathy" <[EMAIL PROTECTED]>
Subject: [gmx-users] .GRO and .TOP files editing
To: "Discussion list for GROMACS users" <gmx-users@gromacs.org>
Message-ID:
        <[EMAIL PROTECTED]>
Content-Type: text/plain; charset="iso-8859-1"

I have a polymer molecule (non-protein).
Therefore I could not use pdb2gmx and I tried to use PRODRG, but it could
process only small molecule.
I was suggested to run PRODRG with small molecule and manually stich the top
file.

Therefore I used a small molecule and obtained the .gro and .top files.
Now,
I have no clue how to stich this .top file.
Shouldn't I also make a .gro file on my own to proceed further ?


Is there any other alternative (other than PRODRG) to make these two files
or
Is there any software package/tool for file stitching?


Thanks,
Karthikeyan



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