Document Detail

Changes in fatty acid distribution and thermotropic properties of phospholipids following phosphatidylcholine depletion in a choline-requiring mutant of Neurospora crassa.
MedLine Citation:
PMID:  6219706     Owner:  NLM     Status:  MEDLINE    
Growth of a choline requiring auxotroph of Neurospora crassa on medium lacking exogenous choline produces large changes in the levels of phosphatidylethanolamine and phosphatidylcholine. Whole cell fatty acid distributions were found to vary widely between different phospholipid species of normally growing, choline-supplemented cultures with phosphatidylcholine showing the highest levels of unsaturation and anionic phospholipids and cardiolipin having the lowest. In these lipids, choline deprivation produced little change in fatty acid profiles of phosphatidylethanolamine, whereas changes in fatty acids of phosphatidylcholine and acidic phospholipids resulted in increased levels of unsaturation at both growth temperatures. Microsomal phospholipids also showed fatty acid variability with sharp decreases in phosphatidylcholine unsaturates and increases in acidic phospholipid unsaturated fatty acids at low growth temperatures. Fluorescence polarization of 1,6-diphenylhexatriene in vesicles formed from total cellular and microsomal lipids showed that choline deprivation produces changes in thermotropic properties in the lipids in deprived cultures at either growth temperature. The effective differences in fluorescence polarization between choline-deprived and supplemented cultures grown at a given temperature were found to be comparable to those produced by temperature were found to be comparable to those produced by temperature acclimation in normally growing cultures over a temperature range of 22 K.
C E Martin; A M Johnston
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Biochimica et biophysica acta     Volume:  730     ISSN:  0006-3002     ISO Abbreviation:  Biochim. Biophys. Acta     Publication Date:  1983 Apr 
Date Detail:
Created Date:  1983-05-27     Completed Date:  1983-05-27     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0217513     Medline TA:  Biochim Biophys Acta     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  10-6     Citation Subset:  IM    
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MeSH Terms
Fatty Acids / metabolism*
Membrane Fluidity
Neurospora crassa / genetics,  metabolism
Phosphatidylcholines / metabolism
Phospholipids / analysis*
Grant Support
Reg. No./Substance:
0/Fatty Acids; 0/Phosphatidylcholines; 0/Phospholipids; 62-49-7/Choline

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

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