Structure Revision of Microginins 674 and 690 from the Cultured Cyanobacterium Microcystis aeruginosa
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Updated: Jan 27, 2026

Spectrophotometric Determination of Phycobiliprotein Content in Cyanobacterium Synechocystis
Published on: September 11, 2018
Kevin Calabro1, Grégory Genta-Jouve2, Olivier P Thomas1,3
1Université Côte d'Azur , CNRS, OCA, IRD, Géoazur, 250 Rue Albert Einstein , 06560 Valbonne , France.
Abstract:
The structures of the commercially available microginins 674 and 690 isolated from a cultured strain of Microcystis aeruginosa and only recently characterized have been revisited. Using NMR and HRMS/MS data, an inversion of two amino acids, N-methylmethionine and tyrosine, in the structure of these metabolites is unambiguously demonstrated. These results highlight the importance of careful examination of spectroscopic data for the proposition of structures of natural products, especially when they are of commercial value.
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