Riboflavin is a component of the Na+-pumping NADH-quinone oxidoreductase from Vibrio cholerae.

Barquera, Blanca; Zhou, Weidong; Morgan, Joel E; Gennis, Robert B · Proc Natl Acad Sci U S A · 2002

basic_science · Level V

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Abstract

Flavins are cofactors in many electron-transfer enzymes. Typically, two types of flavins perform this role: 5'-phosphoriboflavin (FMN) and flavin-adenine dinucleotide (FAD). Both of these are riboflavin derivatives, but riboflavin itself has never been reported to be an enzyme-bound component. We now report that tightly bound riboflavin is a component of the NADH-driven sodium pump from Vibrio cholerae.

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