Tags: Enzyme.
In enzymology a precorrin-3B C17-methyltransferase (EC 2.1.1.131) is an enzyme that catalyzes the chemical reactionS-adenosyl-L-methionine + precorrin-3B S-adenosyl-L-homocysteine + precorrin-4Thus the two substrates of this enzyme are S-adenosyl methionine and precorrin 3B whereas its two products are S-adenosylhomocysteine and precorrin 4.This enzyme belongs to the family of transferases specifically those transferring one-carbon group methyltransferases.