HMM Summary Page: TIGR01699

Functionxanthosine phosphorylase
Gene SymbolxapA
Trusted Cutoff370.90
Domain Trusted Cutoff370.90
Noise Cutoff294.40
Domain Noise Cutoff294.40
Isology Typeequivalog
EC Number2.4.2.1
HMM Length248
Gene Ontology TermGO:0004731: purine-nucleoside phosphorylase activity molecular_function
GO:0006139: nucleobase-containing compound metabolic process biological_process
AuthorSelengut J
Entry DateSep 24 2002 5:01PM
Last ModifiedFeb 14 2011 3:27PM
CommentThis model represents a small clade of purine nucleotide phosphorylases found in certain gamma proteobacteria. The gene is part of an operon for the degradation of xanthosine and is induced by xanthosine [1]. The enzyme is also capable of acting on inosine and guanosine (but not adenosine) in a manner similar to those other phosphorylases to which it is closely related (TIGR01698, TIGR01700).
ReferencesRN [1] RM PMID: 7559336 RT Identification and characterization of genes (xapA, xapB, and xapR) involved in xanthosine catabolism in Escherichia coli. RA Seeger C, Poulsen C, Dandanell G. RL J Bacteriol. 1995 Oct;177(19):5506-16.
Genome PropertyGenProp0780: xanthosine utilization system XapABR (HMM)