AMBER Archive (2008)

Subject: Re: AMBER: using NAB to calculate entropy

From: David A. Case (
Date: Wed Feb 06 2008 - 14:21:28 CST

On Wed, Feb 06, 2008, Wang, Xuelin wrote:
> Is there any information about how to use NAB to calculate entropy of
> ligand-protein systems? My complex is too big for NMODE calculations.

NAB reports thermodynamics from normal mode calculations just like nmode does.
So, you just take snapshots, minimize and compute modes in the same way,
then average the results from the various snapshots. It should be pretty
simple to modify mm-pbsa or pyAmber to handle the averaging, or you can just
do it by hand.



================================================================== David A. Case | e-mail: Dept. of Molecular Biology, TPC15 | fax: +1-858-784-8896 The Scripps Research Institute | phone: +1-858-784-9768 10550 N. Torrey Pines Rd. | skype: dacase La Jolla CA 92037 USA | ================================================================== ----------------------------------------------------------------------- The AMBER Mail Reflector To post, send mail to To unsubscribe, send "unsubscribe amber" to