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  • Title: Occurrence of 5'-deoxyadenosylcobalamin and its physiological function as the coenzyme of methylmalonyl-CoA mutase in a marine eukaryotic microorganism, Schizochytrium limacinum SR21.
    Author: Miyamoto E, Tanioka Y, Yukino T, Hayashi M, Watanabe F, Nakano Y.
    Journal: J Nutr Sci Vitaminol (Tokyo); 2007 Dec; 53(6):471-5. PubMed ID: 18202533.
    Abstract:
    A marine eukaryotic microorganism, Schizochytrium limacinum SR21, had the ability to absorb and accumulate exogenous cobalamin, which was converted to the cobalamin coenzymes 5'-deoxyadenosylcobalamin (20.1%) and methylcobalamin (29.6%). A considerably high activity (about 38 mU/mg protein) of 5'-deoxyadenosylcobalamin-dependent methylmalonyl-CoA mutase (EC 5.4.99.2) involved in amino acid and odd-chain fatty acid metabolism was found in the cell homogenate of S. limacinum SR21. The enzyme was purified to homogeneity and characterized.
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