abelius wrote:
Dear All,

I have AmberFF parameters for a TRP excited state and I was wondering if it was possible to create an alternative TRP residue for gromacs?
Things I've done so far:
* Download and install amber99 for gromacs
* Add a new residue [ ETRP ] with adapted charges to the amber99.rtp file
* Add ETRP to aminoacids.dat

My question is where do I go from here, how can I add distances (bond lengths) and angles?
you can add everything in your amber.rtp file and then rename the residue in your pdb to ETRP. That should be all.


Thank you very much,
Abel


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David.
________________________________________________________________________
David van der Spoel, PhD, Professor of Biology
Dept. of Cell and Molecular Biology, Uppsala University.
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