Hmdb loader
Identification
HMDB Protein ID HMDBP12337
Secondary Accession Numbers None
Name 5'-methylthioadenosine/S-adenosylhomocysteine nucleosidase
Synonyms
  1. MTA/SAH nucleosidase
  2. MTAN
  3. 5'-deoxyadenosine nucleosidase
  4. 5'-methylthioadenosine nucleosidase
  5. S-adenosylhomocysteine nucleosidase
  6. DOA nucleosidase
  7. dAdo nucleosidase
  8. MTA nucleosidase
  9. AdoHcy nucleosidase
  10. SAH nucleosidase
  11. SRH nucleosidase
Gene Name MTNN
Protein Type Unknown
Biological Properties
General Function Not Available
Specific Function Catalyzes the irreversible cleavage of the glycosidic bond in both 5'-methylthioadenosine (MTA) and S-adenosylhomocysteine (SAH/AdoHcy) to adenine and the corresponding thioribose, 5'-methylthioribose and S-ribosylhomocysteine, respectively. Also cleaves 5'-deoxyadenosine, a toxic by-product of radical S-adenosylmethionine (SAM) enzymes, into 5-deoxyribose and adenine. Thus, is required for in vivo function of the radical SAM enzymes biotin synthase and lipoic acid synthase, that are inhibited by 5'-deoxyadenosine accumulation.
Pathways
  • Biosynthesis of amino acids
  • Cysteine and methionine metabolism
  • L-methionine biosynthesis via salvage pathway
Reactions Not Available
GO Classification
Biological Process
L-methionine salvage from methylthioadenosine
L-methionine salvage from S-adenosylmethionine
purine deoxyribonucleoside catabolic process
Molecular Function
adenosylhomocysteine nucleosidase activity
methylthioadenosine nucleosidase activity
Cellular Location Not Available
Gene Properties
Chromosome Location Not Available
Locus Not Available
SNPs Not Available
Gene Sequence Not Available
Protein Properties
Number of Residues 232
Molecular Weight 24373.725
Theoretical pI 5.39
Pfam Domain Function
Signals Not Available
Transmembrane Regions Not Available
Protein Sequence Not Available
GenBank ID Protein Not Available
UniProtKB/Swiss-Prot ID Q5PD46
UniProtKB/Swiss-Prot Entry Name MTNN_SALPA
PDB IDs Not Available
GenBank Gene ID Not Available
GeneCard ID Not Available
GenAtlas ID Not Available
HGNC ID Not Available
References
General References
  1. McClelland M, Sanderson KE, Clifton SW, Latreille P, Porwollik S, Sabo A, Meyer R, Bieri T, Ozersky P, McLellan M, Harkins CR, Wang C, Nguyen C, Berghoff A, Elliott G, Kohlberg S, Strong C, Du F, Carter J, Kremizki C, Layman D, Leonard S, Sun H, Fulton L, Nash W, Miner T, Minx P, Delehaunty K, Fronick C, Magrini V, Nhan M, Warren W, Florea L, Spieth J, Wilson RK: Comparison of genome degradation in Paratyphi A and Typhi, human-restricted serovars of Salmonella enterica that cause typhoid. Nat Genet. 2004 Dec;36(12):1268-74. doi: 10.1038/ng1470. Epub 2004 Nov 7. [PubMed:15531882 ]