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J Bacteriol. 1980 November; 144(2): 592-602

Capnocytophaga spp. contain sulfonolipids that are novel in procaryotes.

ABSTRACT

A group of unusual sulfonolipids was found in bacteria of the genus Capnocytophaga. One of these lipids, to which we have assigned the trivial name capnine, was isolated in 98% pure form and was identified, by infrared absorption spectrometry, high-resolution mass spectrometry, and other methods, as 2-amino-3-hydroxy-15-methylhexadecane-1-sulfonic acid. Another lipid appears to be an N-acylated version of capnine; after acid hydrolysis, its sulfur was recovered in a form chromatographically indistinguishable from that of capnine. The new lipids are related structurally to sphingosine and the ceramides, respectively, but differ markedly from those compounds in important respects, notably the presence of the sulfonate group. Some Capnocytophaga strains accumulated mostly capnine, whereas others accumulated mostly N-acylcapnine. All seven strains examined were found to contain the new lipids, in amounts ranging from 7 to 16 mumol/g of cells (wet weight). The lipids were found in isolated cell envelopes, where they were present in amounts ranging up to 400 mg/g of envelope protein; they are, accordingly, major cell components.

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