FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term S-methylmethionine-homocysteine S-methyltransferase activity ID (Ontology) GO:0061627 (Gene Ontology)
Definition Catalysis of the reaction: S-methyl-L-methionine + L-homocysteine = 2 L-methionine + H+.
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Data ClassFieldDirect annotations
Genes (FBgn)GO_MOLECULAR_FUNCTION
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 Genes
 S-methylmethionine-homocysteine S-methyltransferase activity (all annotations which use CV term, excluding "NOT" statements)
     enables | S-methylmethionine-homocysteine S-methyltransferase activity
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  methyltransferase activity
   |__S-methyltransferase activity
       |__S-methylmethionine-homocysteine S-methyltransferase activity  2 rec.
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Is a S-methyltransferase activity
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Synonyms
  • "homocysteine methyltransferase activity" RELATED[ EC:2 ]
    "homocysteine transmethylase activity" RELATED[ EC:2 ]
    "methylmethionine:homocysteine methyltransferase activity" RELATED[ EC:2 ]
    "S-methylmethionine homocysteine transmethylase activity" RELATED[ EC:2 ]
Secondary IDs
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MetaCyc:MMUM-RXN
Reactome:R-HSA-5696838 "BHMT2 tetramer transfers CH3 group from SMM to LHCYS"
RHEA:26337