Unusual lipid composition of a Bacillus sp. Isolated from Lake Pomorie in Bulgaria |
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| Authors: | Nstor M Carballeira Aikomari Guzmn Jordan T Nechev Kantcho Lahtchev Albena Ivanova Kamen Stefanov |
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| Affiliation: | (1) Institute of Organic Chemistry with Center of Phytochemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria;(2) Institute of Microbiology, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria;(3) Institute of Plant Physiology, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria;(4) Department of Chemistry, University of Puerto Rico, P.O. Box 23346, 00931-3346 Puerto Rico, San Juan |
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| Abstract: | The lipid composition of a Bacillus sp., isolated from Lake Pomorie in Bulgaria, was unusual and consisted of 26 different fatty acids between C12 and C26, with anteiso C15−C17 saturated fatty acids predominating. The furan fatty acid, 10,13-epoxy-11-methyloctadeca-10,12-dienoic acid, was also identified,
a new finding for this genus. The hydrocarbons consisted of 30 different monounsaturated hydrocarbons, between C25 and C30, with the iso-iso, iso-anteiso, anteiso-anteiso, iso-normal, and anteiso-normal methyl branching for odd-numbered chains,
and the iso-iso, iso-anteiso, iso-normal, and anteiso-normal methyl branching for even-numbered chains. The double bond positions
in these hydrocarbons were determined by dimethyl disulfide derivatization followed by GC-MS, and the double-bond cis configuration was confirmed by infrared spectroscopy. Some previously unknown hydrocarbons in bacteria, such as (Z)-3,21-dimethyl-9-tricosene,
(Z)-3,21-dimethyl-10-tricosene, (Z)-2,24-dimethyl-11-pentacosene, and (Z)-2,25-dimethyl-13-hexacosene were identified. Sterols
were detected and were based on the sitosterol nucleus. |
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