Prekorin-2 C20-metiltransferaza (EC 2.1.1.130, Precorrin-2 C20-methyltransferase) je enzim sa sistematskim imenom S-adenozil-L-metionin:prekorin-4 C20-metiltransferaza.[1][2][3] Ovaj enzim katalizuje sledeću hemijsku reakciju
- S-adenozil-L-metionin + prekorin-2 S-adenozil-L-homocistein + prekorin-3A
- ^ Roessner, C.A., Warren, M.J., Santander, P.J., Atshaves, B.P., Ozaki, S., Stolowich, N.J., Iida, K., Scott, A.I. (1992). „Expression of Salmonella typhimurium enzymes for cobinamide synthesis. Identification of the 11-methyl and 20-methyl transferases of corrin biosynthesis”. FEBS Lett. 301: 73—78. PMID 1451790.
- ^ Roessner, C.A., Spencer, J.B., Ozaki, S., Min, C., Atshaves, B.P., Nayar, P., Anousis, N., Stolowich, N.J., Holderman, M.T., Scott, A.I. (1995). „Overexpression in Escherichia coli of 12 vitamin B12 biosynthetic enzymes”. Protein Extr. Purif. 6: 155—163. PMID 7606163.
- ^ Debussche, L., Thibaut, D., Cameron, B., Crouzet, J. and Blanche, F. (1993). „Biosynthesis of the corrin macrocycle of coenzyme B12 in Pseudomonas denitrificans”. J. Bacteriol. 175: 7430—7440. PMID 8226690.