In
enzymology
Enzymes () are proteins that act as biological catalysts by accelerating chemical reactions. The molecules upon which enzymes may act are called substrates, and the enzyme converts the substrates into different molecules known as products. A ...
, a thiol S-methyltransferase () is an
enzyme that
catalyzes
Catalysis () is the process of increasing the rate of a chemical reaction by adding a substance known as a catalyst (). Catalysts are not consumed in the reaction and remain unchanged after it. If the reaction is rapid and the catalyst recyc ...
the
chemical reaction
:S-adenosyl-L-methionine + a thiol
S-adenosyl-L-homocysteine + a thioether
Thus, the two
substrates of this enzyme are
S-adenosyl methionine and
thiol, whereas its two
products are
S-adenosylhomocysteine and
thioether.
This enzyme belongs to the family of
transferases, specifically those transferring one-carbon group methyltransferases. The
systematic name of this enzyme class is S-adenosyl-L-methionine:thiol S-methyltransferase. Other names in common use include S-methyltransferase, thiol methyltransferase, and TMT. This enzyme participates in
selenoamino acid metabolism.
References
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EC 2.1.1
Enzymes of unknown structure
{{2.1-enzyme-stub