Document Detail


Cytochrome c-lipid interactions studied by resonance Raman and 31P NMR spectroscopy. Correlation between the conformational changes of the protein and the lipid bilayer.
MedLine Citation:
PMID:  1654089     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The interaction of cytochrome c with negatively charged lipids has been studied by resonance Raman spectroscopy of the protein heme group and 31P NMR of the phospholipid headgroups. The gel-to-fluid-phase transition of dimyristoylphosphatidylglycerol induces shifts in the conformational and coordination equilibria of the bound cytochrome c, as recorded by the resonance Raman spectra in the fingerprint and marker band regions. Conformational and coordination shifts of the bound cytochrome are also induced on admixture of dioleoylglycerol or dioleoylphosphatidylcholine with dioleoylphosphatidylglycerol. In the case of dioleoylglycerol, significant changes take place even at levels as low as 5 mol %. Binding of cytochrome c induces or increases the content of near isotropically diffusing lipid registered by the 31P NMR spectra of the different lipids studied. Admixture of dioleoylglycerol also increases the bilayer curvature of dioleoylphosphatidylglycerol, inducing an inverted hexagonal phase at 50 mol % concentration; the tendency to spontaneous curvature in the lipid appears to relax the conformational change detected in the protein.
Authors:
T Heimburg; P Hildebrandt; D Marsh
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Biochemistry     Volume:  30     ISSN:  0006-2960     ISO Abbreviation:  Biochemistry     Publication Date:  1991 Sep 
Date Detail:
Created Date:  1991-10-24     Completed Date:  1991-10-24     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  0370623     Medline TA:  Biochemistry     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  9084-9     Citation Subset:  IM    
Affiliation:
Max-Planck-Institut für biophysikalische Chemie, Abteilung Spektroskopie, Göttingen, Federal Republic of Germany.
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MeSH Terms
Descriptor/Qualifier:
Cytochrome c Group / chemistry*
Diglycerides / chemistry
Lipid Bilayers / chemistry*
Magnetic Resonance Spectroscopy
Phospholipases A / chemistry
Protein Binding
Protein Conformation
Protein Kinase C / metabolism
Spectrum Analysis, Raman
Chemical
Reg. No./Substance:
0/Cytochrome c Group; 0/Diglycerides; 0/Lipid Bilayers; EC 2.7.11.13/Protein Kinase C; EC 3.1.1.-/Phospholipases A

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


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