MTAP gene

methylthioadenosine phosphorylase

The information on this page was automatically extracted from online scientific databases.

From NCBI Gene:

This gene encodes an enzyme that plays a major role in polyamine metabolism and is important for the salvage of both adenine and methionine. The encoded enzyme is deficient in many cancers because this gene and the tumor suppressor p16 gene are co-deleted. Multiple alternatively spliced transcript variants have been described for this gene, but their full-length natures remain unknown. [provided by RefSeq, Jul 2008]

From UniProt:

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.

Covered on Genetics Home Reference:

From NCBI Gene:

  • Diaphyseal medullary stenosis-bone malignancy syndrome

From UniProt:

Diaphyseal medullary stenosis with malignant fibrous histiocytoma (DMSMFH): An autosomal dominant bone dysplasia characterized by pathologic fractures due to abnormal cortical growth and diaphyseal medullary stenosis. The fractures heal poorly, and there is progressive bowing of the lower extremities. Some patients show a limb-girdle myopathy, with muscle weakness and atrophy. Approximately 35% of affected individuals develop an aggressive form of bone sarcoma consistent with malignant fibrous histiocytoma or osteosarcoma. [MIM:112250]

Loss of MTAP activity may play a role in human cancer. MTAP loss has been reported in a number of cancers, including osteosarcoma, malignant melanoma and gastric cancer.

Cytogenetic Location: 9p21.3, which is the short (p) arm of chromosome 9 at position 21.3

Molecular Location: base pairs 21,802,636 to 21,867,081 on chromosome 9 (Homo sapiens Updated Annotation Release 109.20200522, GRCh38.p13) (NCBI)

Cytogenetic Location: 9p21.3, which is the short (p) arm of chromosome 9 at position 21.3
  • BDMF
  • c86fus
  • HEL-249
  • MSAP