page_title: Precorrin-2 C20-methyltransferase
hierarchical_section_title: Precorrin-2 C20-methyltransferase
caption_attribution_description: English: structure of dihydrosirochlorin
context_page_description: In enzymology, a precorrin-2 C20-methyltransferase is an enzyme that catalyzes the chemical reaction
  S-adenosyl-L-methionine + precorrin-2 S-adenosyl-L-homocysteine + precorrin-3A
  The two substrates of this enzyme are S-adenosyl methionine and precorrin 2 and its two products are S-adenosylhomocysteine and precorrin 3A.
  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:precorrin-4 C20-methyltransferase and another names in common use is CobI. The enzyme is part of the biosynthetic pathway to cobalamin in aerobic bacteria.
context_section_description: In enzymology, a precorrin-2 C20-methyltransferase (EC 2.1.1.130) is an enzyme that catalyzes the chemical reaction
  S-adenosyl-L-methionine + precorrin-2  S-adenosyl-L-homocysteine + precorrin-3A
  The two substrates of this enzyme are S-adenosyl methionine and precorrin 2 and its two products are S-adenosylhomocysteine and precorrin 3A.
  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:precorrin-4 C20-methyltransferase and another names in common use is CobI. The enzyme is part of the biosynthetic pathway to cobalamin (vitamin B₁₂) in aerobic bacteria.
caption: precorrin-2 substrate of the enzyme
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