A novel heterocyst glycolipid detected in a pelagic N-2-fixing cyanobacterium of the genus Calothrix

作者：Bale Nicole J^*; Hopmans Ellen C; Dorhout Denise; Stal Lucas J; Grego Michele; van Bleijswijk Judith; Damste Jaap S Sinninghe; Schouten Stefan^*

来源：Organic Geochemistry, 2018, 123: 44-47.

DOI：10.1016/j.orggeochem.2018.06.009

• Heterocyst glycolipids
• Heterocystous cyanobacteria
• N-2-fixation
• Pelagic
• Calothrix
• 6-O-methyl-beta-D-glucopyranose

Previous studies have shown that heterocyst glycolipids (HGs) are unique markers for N-2-fixing heterocystous cyanobacteria. In this study, the HGs of a marine pelagic Calothrix sp. CCY1611 isolated from the tropical western North Atlantic were analyzed by ultra-high pressure liquid chromatography-high resolution mass spectrometry and it was shown that this organism contains an unusual C-28 triol HG with a methylated C-6 sugar (methyl-HG(28) triol) head group. Gas chromatography-mass spectrometry analysis of the sugar released from the novel HG by acid methanolysis revealed that the sugar is likely 6-O-methyl-beta-D-glucopyrano se. We propose that this methyl-HG(28) triol is a potential biomarker for pelagic members of the genus Calothrix.

• 出版日期2018-9