S-Adenosyl-L-homocysteine
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| MeSH | S-Adenosylhomocysteine |
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S-Adenosyl-L-homocysteine (SAH) is the biosynthetic precursor to homocysteine.[1] SAH is formed by the demethylation of S-adenosyl-L-methionine.[2][3] Adenosylhomocysteinase converts SAH into homocysteine and adenosine.
Biological role
DNA methyltransferases are inhibited by SAH.[4] Two S-adenosyl-L-homocysteine cofactor products can bind the active site of DNA methyltransferase 3B and prevent the DNA duplex from binding to the active site, which inhibits DNA methylation.[5]
References
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External links
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