Re: [AMBER] MMPBSA tutorial:

From: David A Case <>
Date: Tue, 10 Mar 2015 07:51:45 -0400

On Tue, Mar 10, 2015, camm-kansai wrote:
> MMPBSA calculation using the modified for gave quite
> identical results to that of mmpbsa_pl, i.e., -87.82 kcal/mol, which seems
> to resolve my issue. However, by looking at the AMBER14 manual, it says that
> inp=1 is an old method for nonpolar optimization.

We should update the manual. It *is* true that inp=1 is older than inp=2, but
that doesn't mean it is less reliable. My sense is that inp=2 is sometimes OK
(as in the cases analyzed in the papers that describe how it was constructed),
but that for other cases it has unexpected weaknesses. As a default, inp=1
seems a better choice in the sense that it is more uniformly applicable.

One of the problems with almost all PBSA-based schemes is the need to specify
a non-polar contribution, and it is hard to get one that is really good.
MM-RISM is an attractive alternative, but has never been tested to nearly the
same extent as MM-PBSA.


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Received on Tue Mar 10 2015 - 05:00:04 PDT
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