In vivo and in vitro studies on the carotenoid cleavage oxygenases from Sphingopyxis alaskensis RB2256 and Plesiocystis pacifica SIR-1 revealed their substrate specificities and non-retinal-forming cleavage activities.

Abstract excerpt

Carotenoid cleavage oxygenases are nonheme iron enzymes that specifically cleave carbon-carbon double bonds of carotenoids. Their apocarotenoid cleavage products serve as important signaling molecules that are involved in various biological processes. A database search revealed the presence of putative carotenoid cleavage oxygenase genes in the genomes of Sphingopyxis alaskensis RB2256 and Plesiocystis pacifica...

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