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Synechoxanthin, an Aromatic C40 Xanthophyll that Is a Major Carotenoid in the Cyanobacterium Synechococcus sp. PCC 7002

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journal contribution
posted on 26.09.2008, 00:00 authored by Joel E. Graham, Juliette T. J. Lecomte, Donald A. Bryant
A major aromatic, dicarboxylate carotenoid (>15% of total) was isolated from the euryhaline cyanobacterium Synechococcus sp. PCC 7002. This compound, which was given the common name synechoxanthin (1), has been assigned the structure (all-E) χ,χ-caroten-18,18′-dioic acid by a combination of spectroscopic (UV−vis, FT-IR, 1H and 13C NMR, LC-MS) and chemical methods. This discovery conclusively establishes that some cyanobacteria are capable of synthesizing aromatic carotenoids.