Catalyzes the reversible phosphorylation of S-methyl-5'- thioadenosine (MTA) to adenine and 5-methylthioribose-1-phosphate. Involved in the breakdown of MTA, a major by-product of polyamine biosynthesis. Responsible for the first step in the methionine salvage pathway after MTA has been generated from S- adenosylmethionine. Has broad substrate specificity with 6- aminopurine nucleosides as preferred substrates. Homotrimer. Ubiquitously expressed. Inhibited by 5'-methylthiotubercin and 5'- chloroformycin. Belongs to the PNP/MTAP phosphorylase family. MTAP subfamily. Note: This description may include information from UniProtKB.
Protein type: Amino Acid Metabolism - cysteine and methionine; EC 220.127.116.11; Phosphorylase; Transferase