Reaction: S-methyl-5'-thioinosine + phosphate = hypoxanthine + S-methyl-5-thio-α-D-ribose 1-phosphate
Other name(s): MTIP; MTI phosphorylase; methylthioinosine phosphorylase
Systematic name: S-methyl-5'-thioinosine:phosphate S-methyl-5-thio-α-D-ribosyl-transferase
Comments: No activity with S-methyl-5'-thioadenosine. The catabolism of of 5'-methylthioadenosine in Pseudomonas aeruginosa involves deamination to S-methyl-5'-thioinosine (EC 18.104.22.168, S-methyl-5'-thioadenosine deaminase) and phosphorolysis to hypoxanthine .
Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, PDB, CAS registry number:
1. Guan, R., Ho, M.C., Almo, S.C. and Schramm, V.L. Methylthioinosine phosphorylase from Pseudomonas aeruginosa. Structure and annotation of a novel enzyme in quorum sensing. Biochemistry 50 (2011) 1247-1254. [PMID: 21197954]