Hi Ralf

This is in relation to refining RNA/DNA structures. I'm basically trying to duplicate the restraints specified in http://cns.csb.yale.edu/cgi-bin/cns_solve_1.2/cns_view.cgi?&file=inputs/auxiliary/dna-rna_restraints.def

Basically, in RNA A-form helicies the sugar pucker is restrained around 3 angles, and the atoms of the bases must be planar. 

FR

---------------------------------------------
Francis Reyes M.Sc.
215 UCB
University of Colorado at Boulder

gpg --keyserver pgp.mit.edu --recv-keys 67BA8D5D

8AE2 F2F4 90F7 9640 28BC  686F 78FD 6669 67BA 8D5D



On Oct 9, 2007, at 10:27 AM, Ralf W. Grosse-Kunstleve wrote:

Hi Francis,
Currently we don't support what you are looking for; sorry.
geometry_restraints.edits would be the place to look, but
you'll find only bond and angle. I didn't get to the other
restraint types.
However, in theory you could work with .cif files, although
it may be a bit cumbersome. Could you explain in some detail
which atoms you want to restrain?
I'll put the geometry_restraints.edits.planarity support up
higher on my todo list.
Ralf
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