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The chemical reactions and pathways involving the nonmetallic element sulfur or compounds that contain sulfur, such as the amino acids methionine and cysteine or the tripeptide glutathione. The chemical reactions and pathways resulting in the formation of S-methyl-methionine (SMM) from methionine and S-adenosyl-methionine (Ado-Met), catalyzed by methionine S-methyltransferase (MMT). SMM can be reconverted to methionine by donating a methyl group to homocysteine, and concurrent operation of this reaction and that mediated by MMT sets up the SMM cycle. The chemical reactions and pathways involving S-methyl-methionine (SMM). SMM can be converted to methionine by donating a methyl group to homocysteine, and concurrent operation of this reaction and that mediated by MMT sets up the SMM cycle. A cyclic series of interconversions involving S-methyl-L-methionine, S-adenosyl-L-homocysteine, S-adenosyl-L-methionine, L-homocysteine, and L-methionine. Converts the methionine moiety of adenosylmethionine back to free methionine, and may serve regulate the cellular adenosylmethionine level. The chemical reactions and pathways by which individual cells transform chemical substances.

View Gene Ontology (GO) Term

GO TERM SUMMARY
Name: S-methylmethionine metabolic process
Acc: GO:0033477
Aspect: Biological Process
Desc: The chemical reactions and pathways involving S-methyl-methionine (SMM). SMM can be converted to methionine by donating a methyl group to homocysteine, and concurrent operation of this reaction and that mediated by MMT sets up the SMM cycle.
Synonyms:
  • S-methylmethionine metabolism
Proteins in PDR annotated with:
   This term: 0
   Term or descendants: 1 [Search]


[geneontology.org]
INTERACTIVE GO GRAPH

GO:0033477 - S-methylmethionine metabolic process (interactive image map)
YRC Informatics Platform - Version 3.0
Created and Maintained by: Michael Riffle