Re: AMBER: NMR refinement

From: David A. Case <>
Date: Thu, 24 Jan 2008 18:18:48 -0800

On Thu, Jan 24, 2008, Seth Lilavivat wrote:
> In the NMR refinement tutorial, it suggests setting ialtd=1 if your
> structure is distorted due to an opposition of restraints and force field.
> Is it ok to refine the structure using the ialtd=1 or is this meant as a way
> to help find bad restraints?

You can do refinements with ialtd=1, but you would want to look carefully at
any large NOE violations that are encountered, and figure out if you can live
with them or not. Sometimes a "soft" restraint like this will end up throwing
out important information.


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
Received on Sun Jan 27 2008 - 06:07:24 PST
Custom Search