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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
3
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pubmed:dateCreated |
1993-7-8
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pubmed:abstractText |
The cytoskeletal component vinculin has been demonstrated by hydrophobic photoradiolabelling, to insert into bilayers containing acidic phospholipids and trace amounts of a photoactivatable analogue of lecithin. It is shown in this study that the higher-molecular-mass variant metavinculin and alpha-actinin, also share this property. alpha-Actinin and vinculin were also shown to associate with phosphatidylserine liposomes by chromatography of protein/lipid mixtures on a Bio-Gel A-5m column. Furthermore, interesting differences in the behaviour of binary mixtures of these proteins, in the presence of phosphatidylserine liposomes, are shown. Thus, incubation of alpha-actinin with vinculin or metavinculin, prior to the addition of liposomes, strongly inhibited the photoradiolabelling of alpha-actinin under conditions in which the liposome surface was non-limiting, but enhanced the labelling of vinculin. In contrast, vinculin and metavinculin did not mutually influence their labelling. Using gel-filtration chromatography, it was shown that alpha-actinin still bound to the vinculin-liposome complex, under conditions similar to those used for hydrophobic photolabelling with a non-limiting lipid surface. In the presence of limiting amounts of liposomes, the alpha-actinin/vinculin ratio was markedly decreased in the liposome fractions. Our results suggest the formation of a ternary complex consisting of vinculin, alpha-actinin and phospholipids. In this complex, both proteins interact at the bilayer, resulting in an altered conformation of the two proteins and, as a consequence, in modified bilayer interactions.
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pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:chemical |
http://linkedlifedata.com/resource/pubmed/chemical/Actinin,
http://linkedlifedata.com/resource/pubmed/chemical/Lipid Bilayers,
http://linkedlifedata.com/resource/pubmed/chemical/Liposomes,
http://linkedlifedata.com/resource/pubmed/chemical/Muscle Proteins,
http://linkedlifedata.com/resource/pubmed/chemical/Phospholipids,
http://linkedlifedata.com/resource/pubmed/chemical/Vinculin
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pubmed:status |
MEDLINE
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pubmed:month |
May
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pubmed:issn |
0014-2956
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:day |
1
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pubmed:volume |
213
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
1009-15
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pubmed:dateRevised |
2007-7-23
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pubmed:meshHeading |
pubmed-meshheading:8504798-Actinin,
pubmed-meshheading:8504798-Animals,
pubmed-meshheading:8504798-Chromatography, Gel,
pubmed-meshheading:8504798-Lipid Bilayers,
pubmed-meshheading:8504798-Liposomes,
pubmed-meshheading:8504798-Muscle Proteins,
pubmed-meshheading:8504798-Phospholipids,
pubmed-meshheading:8504798-Swine,
pubmed-meshheading:8504798-Vinculin
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pubmed:year |
1993
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pubmed:articleTitle |
Evidence for a ternary interaction between alpha-actinin, (meta)vinculin and acidic-phospholipid bilayers.
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pubmed:affiliation |
Department of Pathology, University of Bern, Switzerland.
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pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
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