Rigid vs flexible docking comparison?

[Jeff Taylor]

In article <4av6tg$11r0 at pulp.ucs.ualberta.ca>,
	max at mycroft.mmid.ualberta.ca (Max Cummings) writes:
>Hi,
>
>Is anyone aware of a comparison of rigid-body and
>flexible automated docking? Or a good review
>discussion of this?
>
>Thanks
>
>--
>Max Cummings_____max at clouseau.mmid.ualberta.ca


Max --
	I did a rigid vs. flexible study for the docking of two proteins from
the Adenovirus capsid.  The results were quite dramatic and though I haven't
yet published them, I will be glad to share them with you.
	Briefly, I used the Charmm molecular mechanics package to place the two
proteins and calculate an energy in a loop that explored the region of space
I was interested in.  I then repeated the study with a minimization instead
of the simple energy sum.
	The two methods gave results that differed by several angstroms.  I
believe the minimization method does give superior results, however the trade
off is, of course, time.  
	I would be happy to discuss this further and show you some graphs of
the results I mentioned.  If you (or anyone else) are interested reply via
E-mail.

Jeff Taylor

The Wistar Institute
University of Pennsylvania
Jeff at aries.wistar.upenn.edu