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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 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.

View Gene Ontology (GO) Term

GO TERM SUMMARY
Name: S-methylmethionine cycle
Acc: GO:0033528
Aspect: Biological Process
Desc: 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.
Proteins in PDR annotated with:
   This term: 1 [Search]
   Term or descendants: 1 [Search]


[geneontology.org]
INTERACTIVE GO GRAPH

GO:0033528 - S-methylmethionine cycle (interactive image map)
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