(methionine synthase) reductase
- 2 [methionine synthase]-methylcob(I)alamin + 2 S-adenosylhomocysteine + NADP+ 2 [methionine synthase]-cob(I)alamin + NADPH + H+ + 2 S-adenosyl-L-methionine
The 3 substrates of this enzyme are [[[methionine synthase]-methylcob(I)alamin]], S-adenosylhomocysteine, and NADP+, whereas its 4 products are [[[methionine synthase]-cob(I)alamin]], NADPH, H+, and S-adenosyl-L-methionine.
This enzyme belongs to the family of oxidoreductases, specifically those oxidizing metal ion with NAD+ or NADP+ as acceptor. The systematic name of this enzyme class is [methionine synthase]-methylcob(I)alamin,S-adenosylhomocysteine:NADP+ oxidoreductase. Other names in common use include methionine synthase cob(II)alamin reductase (methylating), methionine synthase reductase, [methionine synthase]-cobalamin methyltransferase (cob(II)alamin, and reducing). It employs one cofactor, flavoprotein.
- IUBMB entry for 126.96.36.199
- BRENDA references for 188.8.131.52 (Recommended.)
- PubMed references for 184.108.40.206
- PubMed Central references for 220.127.116.11
- Google Scholar references for 18.104.22.168
- Rommens JM, Scherer SW, Rosenblatt DS, Gravel RA (1998). "Cloning and mapping of a cDNA for methionine synthase reductase, a flavoprotein defective in patients with homocystinuria". Proc. Natl. Acad. Sci. U. S. A. 95: 3059–64. PMID 9501215.
- Olteanu H, Banerjee R (2001). "Human methionine synthase reductase, a soluble P-450 reductase-like dual flavoprotein, is sufficient for NADPH-dependent methionine synthase activation". J. Biol. Chem. 276: 35558–63. PMID 11466310.
- Olteanu H, Munson T, Banerjee R (2002). "Differences in the efficiency of reductive activation of methionine synthase and exogenous electron acceptors between the common polymorphic variants of human methionine synthase reductase". Biochemistry. 41: 13378–85. PMID 12416982.
- The CAS registry number for this enzyme class is 207004-87-3.