Dear Users,
I am currently refining a structure of a
bacterial oxido-reductase enzyme and Im trying
to fit extra density seen on a cysteine
residue. Would appreciate some recommendations
re. what this may be (here is a link to the map-
http://sdrv.ms/XTNTFs ). There is clearly one
extra atom here (seen in both chains very
clearly), but unsure what it could be
methylation? -SOH? The cysteine residue is not
in the active site and is solvent exposed. The protein sequence was confirmed.
Thanks for any help.
Kirk Hevener
ps: the map was contoured at 1.2sigma and the difference map at 3sigma
