Lux proteins

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the counterpart in marine bacteria of the luciferase system. They mediate bioluminescence, and are products of genes regulated by the lux operon. In Vibrio spp., LuxA (catalytic subunit) and LuxB constitute bacterial luciferase (EC 1.14.14.3); it catalyses a reaction between reduced FMN, RCHO, and O2 to form FMN, RCOOH, H2O, and . LuxC is an acyl-CoA reductase required to form the 'RCHO' above. LuxD is an acyl transferase component of the fatty acid reductase system required for aldehyde biosynthesis (EC 2.3.1.-). LuxE is an acyl-protein synthetase (EC 6.2.1.19) that activates tetradecanoic acid. LuxG is the flavin reductase. LuxI and LuxJ are part of the regulatory system; they are required for the synthesis of OHHL (N-(3-oxohexanoyl)-l-homoserine lactone), an autoinducer molecule that binds to LuxR. LuxR is the transcriptional activator.

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