Re: [AMBER] Problem using solvatebox for large, linear peptide

From: Jason Swails <jason.swails.gmail.com>
Date: Fri, 1 Feb 2013 22:22:54 -0500

On Fri, Feb 1, 2013 at 6:32 PM, Joe Passman <joepassman.comcast.net> wrote:

> Thanks for the information. I am need of solvating the entire protein. I
> would like a big enough buffer region to prevent interactions among
> replicas. What do you suggest for an appropriated buffer size? The radius
> of gyration for my system is about 21 ang. I would like to be able to
> vizualize the information in vmd, so a fix before the move to mmCIF would
> be awesome .
>

Why not just visualize the prmtop and inpcrd file directly in VMD? Why do
you need to go through a PDB file? If you must have a PDB file, perhaps
try cpptraj, but there are no guarantees such a large system is supported
in PDB format from this source, either.

Maybe try the original 20A buffer and see what the box dimensions are --
they may be large enough to allow free rotation (and, like Dave suggested,
a truncated octahedron may be a much better choice for you).

Good luck,
Jason

-- 
Jason M. Swails
Quantum Theory Project,
University of Florida
Ph.D. Candidate
352-392-4032
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Received on Fri Feb 01 2013 - 19:30:03 PST
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