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  • Title: Structural and functional analysis of a lycopene beta-monocyclase gene isolated from a unique marine bacterium that produces myxol.
    Author: Teramoto M, Takaichi S, Inomata Y, Ikenaga H, Misawa N.
    Journal: FEBS Lett; 2003 Jun 19; 545(2-3):120-6. PubMed ID: 12804761.
    Abstract:
    A gene coding for lycopene beta-monocyclase, which metabolizes lycopene (psi,psi-carotene) to gamma-carotene (beta,psi-carotene), was isolated for the first time from a unique marine bacterium strain P99-3 that produces myxol (a gamma-carotene derivative). This lycopene beta-monocyclase gene (designated crtYm) was included in the gene cluster which contained carotenoid biosynthetic gene (crtI, crtB, crtZ, crtY, and crtA) homologs. CrtYm, the CrtY homolog, metabolized lycopene to gamma-carotene, which was confirmed by deletion/expression analysis of the crtYm and by subsequent analysis of the metabolites from lycopene based on the retention times on high-performance liquid chromatography, UV-visible absorption spectra, and mass spectrometry.
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