2008年11月
Cold adaptation of eicosapentaenoic acid-less mutant of Shewanella livingstonensis Ac10 involving uptake and remodeling of synthetic phospholipids containing various polyunsaturated fatty acids
EXTREMOPHILES
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- 巻
- 12
- 号
- 6
- 開始ページ
- 753
- 終了ページ
- 761
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1007/s00792-008-0182-6
- 出版者・発行元
- SPRINGER JAPAN KK
An Antarctic psychrotrophic bacterium, Shewanella livingstonensis Ac10, produces cis-5,8,11,14,17-eicosapentaenoic acid (EPA), a long-chain polyunsaturated fatty acid (LPUFA), as a component of membrane phospholipids at low temperatures. The EPA-less mutant generated by disruption of the EPA synthesis gene becomes cold-sensitive. We studied whether the cold sensitivity could be suppressed by supplementation of various LPUFAs. The EPA-less mutant was cultured at 6 degrees C in the presence of synthetic phosphatidylethanolamines (PEs) that contained oleic acid at the sn-1 position and various C20 fatty acids with different numbers of double bonds from zero to five or cis-4,7,10,13,16,19-docosahexaenoic acid (DHA) at the sn-2 position. Mass spectrometric analyses revealed that all these fatty acids became components of various PE and phosphatidylglycerol species together with shorter partner fatty acids, indicating that large-scale remodeling followed the incorporation of synthetic PEs. As the number of double bonds in the sn-2 acyl chain decreased, the growth rate decreased and the cells became filamentous. The growth was restored to the wild-type level only when the medium was supplemented with phospholipids containing EPA or DHA. We found that about a half of DHA was converted into EPA. The results suggest that intact EPA is best required for cold adaptation of this bacterium.
- リンク情報
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- DOI
- https://doi.org/10.1007/s00792-008-0182-6
- J-GLOBAL
- https://jglobal.jst.go.jp/detail?JGLOBAL_ID=200902211618049020
- PubMed
- https://www.ncbi.nlm.nih.gov/pubmed/18668196
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000260540600002&DestApp=WOS_CPL
- ID情報
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- DOI : 10.1007/s00792-008-0182-6
- ISSN : 1431-0651
- eISSN : 1433-4909
- J-Global ID : 200902211618049020
- PubMed ID : 18668196
- Web of Science ID : WOS:000260540600002