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J Nat Prod. 1999 Jun;62(6):859-63.

Carotenoid glycoside esters from the thermophilic bacterium meiothermusruber

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  • 1School of Biochemistry and Molecular Genetics, Department of Food Science and Technology, Department of Biotechnology, University of New South Wales, Sydney 2052, Australia.


The thermophilic bacterium Meiothermus ruber produces a series of carotenoid glycoside esters. The major carotenoid has been identified as 1'-beta-glucopyranosyl-3,4,3',4'-tetradehydro-1', 2'-dihydro-beta,psi-caroten-2-one (1). It is acylated at the 6' '-position of the glucose unit by a series of C10-C17 fatty acids. The structure of 1 was established by spectral means, including complete assignment of the 1H and 13C NMR resonances by inverse 2D NMR spectroscopy. These carotenoids are thought to play roles in stabilizing membranes of this thermophilic organism.

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