Document Detail


How Drosophila species acquire cold tolerance--qualitative changes of phospholipids.
MedLine Citation:
PMID:  9546680     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Phospholipids of many cold-tolerant organisms have been reported to contain more unsaturated fatty acids than cold-susceptible organisms, a phenomenon known to maintain membrane fluidity at low temperature. However, we have obtained results to the contrary through a comparison of the membrane phospholipids of six temperate and subtropical species belonging to the Drosophila melanogaster species group. With enhancement of cold tolerance, the percentages of monoenoic acids increased but the percentages of dienoic acids decreased, that is, the number of double bonds in the phospholipid decreased without a marked variation in the percentages of unsaturated fatty acids. Concomitantly, the percentage of fatty acids containing 16 carbon atoms increased, while that of fatty acids with 18 carbon atoms decreased. Since phosphatidylethanolamine is a dominant phospholipid in Drosophila, these changes probably contribute to keeping the homeoviscosity of the cellular membranes in a manner different to that in phosphatidylcholine-rich membranes, thereby increasing cold tolerance.
Authors:
T Ohtsu; M T Kimura; C Katagiri
Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  European journal of biochemistry / FEBS     Volume:  252     ISSN:  0014-2956     ISO Abbreviation:  Eur. J. Biochem.     Publication Date:  1998 Mar 
Date Detail:
Created Date:  1998-05-13     Completed Date:  1998-05-13     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0107600     Medline TA:  Eur J Biochem     Country:  GERMANY    
Other Details:
Languages:  eng     Pagination:  608-11     Citation Subset:  IM    
Affiliation:
Department of Biology, Faculty of Science, Hokkaido University, Sapporo, Japan.
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MeSH Terms
Descriptor/Qualifier:
Acclimatization*
Animals
Climate
Cold Temperature
Drosophila / physiology*
Fatty Acids, Unsaturated / analysis
Female
Hot Temperature
Japan
Male
Oviposition
Phospholipids / chemistry,  metabolism*
Species Specificity
Chemical
Reg. No./Substance:
0/Fatty Acids, Unsaturated; 0/Phospholipids

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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