Serine hydroxymethyltransferase, mitochondrial - P34897 (GLYM_HUMAN)


Protein Feature View of PDB entries mapped to a UniProtKB sequence  

  • Number of PDB entries for P34897: 4
Catalyzes the cleavage of serine to glycine accompanied with the production of 5,10-methylenetetrahydrofolate, an essential intermediate for purine biosynthesis (PubMed:24075985, PubMed:29364879, PubMed:25619277). Serine provides the major source of folate one-carbon in cells by catalyzing the transfer of one carbon from serine to tetrahydrofolate (PubMed:25619277). Contributes to the de novo mitochondrial thymidylate biosynthesis pathway via its role in glycine and tetrahydrofolate metabolism: thymidylate biosynthesis is required to prevent uracil accumulation in mtDNA (PubMed:21876188). Also required for mitochondrial translation by producing 5,10-methylenetetrahydrofolate; 5,10-methylenetetrahydrofolate providing methyl donors to produce the taurinomethyluridine base at the wobble position of some mitochondrial tRNAs (PubMed:29452640, PubMed:29364879). Associates with mitochondrial DNA (PubMed:18063578). In addition to its role in mitochondria, also plays a role in the deubiquitination of target proteins as component of the BRISC complex: required for IFNAR1 deubiquitination by the BRISC complex (PubMed:24075985). UniProt
Catalytic Activity
6R-5,10-methylene-5,6,7,8-tetrahydrofolate + glycine + H2O = 6S-5,6,7,8-tetrahydrofolate + L-serine UniProt
Pathway Maps
      ESCHER  BiGG
Subunit Structure
Homotetramer; in the presence of bound pyridoxal 5'-phosphate (PubMed:29180469, PubMed:25619277). Homodimer; in the absence of bound pyridoxal 5'-phosphate (PubMed:29180469, PubMed:25619277). Pyridoxal 5'-phosphate binding mediates an important conformation change that is required for tetramerization (PubMed:25619277). Interacts with ABRAXAS2; the interaction is direct. Identified in a complex with ABRAXAS2 and the other subunits of the BRISC complex, at least composed of the ABRAXAS2, BRCC3/BRCC36, BABAM2 and BABAM1/NBA1. Identified in a complex with ABRAXAS2 and IFNAR1 (PubMed:24075985). Interacts with KIRREL3 (PubMed:25902260). UniProt
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