Sorry this is not a CCP4-related question:
While refining my structure, I can see density for a N-acetylglucosamine
group at an Asparagine residue
(which confirms experimental data). Using the topology and parameter
files for a NAG group, CNS
does not know yet that there is a bond between the NAG C1 atom and
the Asn ND2 atom. As a consequence,
CNS shifts the NAG residue away from the Asn.
What should I change in the topology / parameter files ?
Thanks,
Filip Van Petegem
-- =========================================================== Filip Van Petegem Laboratory for Protein Biochemistry and Protein Engineering Department of Biochemistry Physiology and Microbiology K.L. Ledeganckstraat 35 Tel: (32)-9-264-5127 BP 9000 GENT Fax: (32)-9-264-5338 BELGIUM E-mail: Filip.VanPetegem@.rug.ac.be ===========================================================