Re: [AMBER] MD simulation with non natural amino acid, parameterized using the RED server

From: David A Case <david.case.rutgers.edu>
Date: Wed, 17 Aug 2016 10:13:46 -0400

On Wed, Aug 17, 2016, Cecilia Lindgren wrote:
>
> Building proper torsion parameters.
> ** No torsion terms for CT-NT-P-OS
> ** No torsion terms for CT-NT-P-OS
> ** No torsion terms for OS-P-NT-CT
> ** No torsion terms for OS-P-NT-CT
>
> I am using ff99SB. There were some bonds, angles and dihedrals missing
> when parameterizing, but I have used the analogous parameters from the
> gaff force field, and received an frcmod file which I have uploaded, and
> amber is not complaining about any other of those parameters. (One of
> these that I have in the frcmod file is CT-NT-P-OS). I have attached the
> frcmod.known file that I have used.

Can you list the exact commands you gave to tleap? Have you carefully examined
the leap.log file to see there are any messages relating the
"loadAmberParams frcmod.known" command?

...dac


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Received on Wed Aug 17 2016 - 07:30:02 PDT
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