Linked Life Data

3707939

Source:http://linkedlifedata.com/resource/pubmed/id/3707939

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
8
pubmed:dateCreated
1986-7-15
pubmed:abstractText
Band 3, isolated from human erythrocytes, has been reconstituted into bilayers of 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC) deuterated in the terminal methyl groups of the choline head group. By use of Triton X-100 for selective extraction and purification of band 3 and then cholate for subsequent solubilization with the lipid, a number of reconstituted complexes were produced by exhaustive detergent dialysis with protein:lipid weight ratios of between 0.32:1 and 1.25:1. Electron micrographs of negatively stained complexes showed that this method produced large vesicles of greater than 300-nm diameter. Deuterium nuclear magnetic resonance (NMR) spectra from the choline methyl deuterons in bilayer lipid above the liquid-crystal-gel phase transition temperature were shown to change systematically with increasing concentrations of band 3 in the bilayers. The measured quadrupole splittings, taken as the separation of the turning points in the recorded spectra, decreased from a value of 1.28 kHz for pure lipid to 0.98 kHz for bilayers with a protein:lipid ratio of 1.25:1 at 26 degrees C. At 35 degrees C, a more pronounced decrease in the quadrupole splittings was measured. The data from the complexes with protein:lipid ratios up to 0.7:1 (w/w) obey the mathematical treatment for a rapid two-site exchange between lipids at the protein-lipid interface and the bulk lipid phase. The temperature dependence of the measured quadrupole splitting with respect to the protein:lipid ratio indicates that the amount of lipid at the protein-lipid interface increases with increasing temperature.(ABSTRACT TRUNCATED AT 250 WORDS)
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0006-2960
pubmed:author
pubmed:issnType
Print
pubmed:day
22
pubmed:volume
25
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
2180-7
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1986
pubmed:articleTitle
Evidence from deuterium nuclear magnetic resonance for the temperature-dependent reversible self-association of erythrocyte band 3 in dimyristoylphosphatidylcholine bilayers.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't