| Absence of carotenes and presence of a tertiary methoxy group in a carotenoid from a thermophilic filamentous photosynthetic bacterium Roseiflexus castenholzii. | |
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MedLine Citation:
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PMID: 11773528 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We identified pigments in a thermophilic filamentous photosynthetic bacterium Roseiflexus castenholzii strain HL08. We detected neither bacteriochlorophyll (BChl) c nor carotenes in this bacterium cultured under the aerobic dark and the anaerobic light conditions, which may correspond to its lack of chlorosomes. In the cells cultured under the aerobic dark conditions, the carotenoids were derivatives of keto-gamma-carotene, and the major ones were methoxy-keto-myxocoxanthin and keto-myxocoxanthin glucoside fatty acid ester. Although the tertiary methoxy group at C-1' and the double bond at C-3',4' in the psi end group of carotenoid, such as spirilloxanthin, have only been found in purple bacteria, this was the first such report in other bacterial groups. The fatty acid moiety was composed of iso fatty acids, which were rare in the cellular lipids. In the cells cultured under the anaerobic light conditions, in addition to these keto-carotenoids, we also found non-oxidized carotenoids (derivatives of gamma-carotene). Concerning the esterifying alcohol of BChl a, we found a substantial amount of geranylgeraniol, although the major component was phytol. The existence of these pigments makes this bacterium unique among the known species in CHLOROFLEXACEAE. |
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Authors:
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S Takaichi; T Maoka; M Yamada; K Matsuura; Y Haikawa; S Hanada |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Plant & cell physiology Volume: 42 ISSN: 0032-0781 ISO Abbreviation: Plant Cell Physiol. Publication Date: 2001 Dec |
Date Detail:
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Created Date: 2002-01-04 Completed Date: 2002-04-05 Revised Date: 2004-11-17 |
Medline Journal Info:
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Nlm Unique ID: 9430925 Medline TA: Plant Cell Physiol Country: Japan |
Other Details:
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Languages: eng Pagination: 1355-62 Citation Subset: IM |
Affiliation:
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Biological Laboratory, Nippon Medical School, Kawasaki, 211-0063 Japan. takaichi@nms.ac.jp |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Aerobiosis Anaerobiosis Bacteriochlorophylls / analysis*, chemistry Carotenoids / chemistry*, isolation & purification, metabolism Chlorobi / chemistry*, physiology, radiation effects Darkness Fatty Acids / analysis Glucosides / analysis Light Magnetic Resonance Spectroscopy Temperature Xanthine / chemistry*, isolation & purification, metabolism Xanthines |
| Chemical | |
Reg. No./Substance:
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0/Bacteriochlorophylls; 0/Fatty Acids; 0/Glucosides; 0/Xanthines; 0/keto-myxocoxanthin glucoside ester; 0/methoxy-keto-myxocoxanthin; 36-88-4/Carotenoids; 69-89-6/Xanthine |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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