HMM Summary Page: TIGR01656

Functionhistidinol-phosphate phosphatase domain
Trusted Cutoff84.15
Domain Trusted Cutoff84.15
Noise Cutoff62.40
Domain Noise Cutoff62.40
Isology Typesubfamily_domain
HMM Length149
AuthorSelengut J
Entry DateAug 29 2002 4:35PM
Last ModifiedFeb 14 2011 3:27PM
CommentThis domain is found in authentic histidinol-phosphate phosphatases which are sometimes found as stand-alone entities and sometimes as fusions with imidazoleglycerol-phosphate dehydratase (TIGR01261). Additionally, a family of proteins including YaeD from E. coli (TIGR00213) and various other proteins are closely related but may not have the same substrate specificity. This domain is a member of the haloacid-dehalogenase (HAD) superfamily of aspartate-nucleophile hydrolases. This superfamily is distinguished by the presence of three motifs: an N-terminal motif containing the nucleophilic aspartate, a central motif containing an conserved serine or threonine, and a C-terminal motif containing a conserved lysine (or arginine) and conserved aspartates. More specifically, the domian modelled here is a member of subfamily III of the HAD-superfamily by virtue of lacking a "capping" domain in either of the two common positions, between motifs 1 and 2, or between motifs 2 and 3.
ReferencesCC DR HAMAP; MF_01022; 53 of 53