id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	blockedby	blocking	notify_on_close	platform	project
3105	addh wrong hydrogen name on glycosylated Asn residues	Elaine Meng	Eric Pettersen	"When the asparagine is glycosylated, since there is only one hydrogen added to the sidechain N it gets named HD2, whereas the template hydrogen names are HD21 and HD22.  An example structure with hydrogens on glycosylated Asn is 1ah1 (has name HD21).  An example for testing addh with both glycosylated and unglycosylated asparagines is 5o4o.

There may be analogous situations but I can't think of any off the top of my head.  Serines and tyrosines may be O-glycosylated, but then addh won't add any hydrogens to that oxygen anyway.

Daniel Asarnow reports that the name HD2 causes problems in Phenix.
<http://www.rbvi.ucsf.edu/pipermail/chimerax-users/2020-April/001073.html>"	defect	closed	moderate		Structure Editing		fixed		tic20@… asarnow@…				all	ChimeraX