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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
6
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pubmed:dateCreated |
1987-10-15
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pubmed:abstractText |
The aim of this study was to identify constituents of the intermediate C5b-7 complex of human complement that mediate binding of C8 and formation of C5b-8. Analysis of interactions between purified C8 and C5, C6, or C7 indicate that C5 and C8 associate to form a dimer in solution. This interaction is specific and involves a single C5 binding site located on the beta-subunit of C8. Simultaneous interaction of C8 with C5 and C9 in solution suggests that during assembly of the cytolytic C5b-9 complex on membranes, C8 binds to C5b-7 through association of beta with C5b, after which C9 associates through interaction with the previously identified C9-specific site on the alpha-subunit. Other evidence of interaction with C5b was provided by the fact that C8 can bind purified C5b6. Also, in situ cross-linking experiments showed that within C5b-8, the beta-subunit is in close proximity to C5b. These results indicate that C8 binding to C5b-7 is mediated by a specific C5b recognition site on beta, thus explaining the requirement for this subunit in C5b-8 formation. They also reveal that C5b contains a specific site for interaction with beta.
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pubmed:grant | |
pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
AIM
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pubmed:chemical |
http://linkedlifedata.com/resource/pubmed/chemical/Complement C5,
http://linkedlifedata.com/resource/pubmed/chemical/Complement C5b,
http://linkedlifedata.com/resource/pubmed/chemical/Complement C8,
http://linkedlifedata.com/resource/pubmed/chemical/Complement Membrane Attack Complex,
http://linkedlifedata.com/resource/pubmed/chemical/Complement System Proteins,
http://linkedlifedata.com/resource/pubmed/chemical/Cross-Linking Reagents,
http://linkedlifedata.com/resource/pubmed/chemical/Macromolecular Substances
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pubmed:status |
MEDLINE
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pubmed:month |
Sep
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pubmed:issn |
0022-1767
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:day |
15
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pubmed:volume |
139
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
1960-4
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pubmed:dateRevised |
2007-11-14
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pubmed:meshHeading |
pubmed-meshheading:3624872-Binding Sites,
pubmed-meshheading:3624872-Complement Activation,
pubmed-meshheading:3624872-Complement C5,
pubmed-meshheading:3624872-Complement C5b,
pubmed-meshheading:3624872-Complement C8,
pubmed-meshheading:3624872-Complement Membrane Attack Complex,
pubmed-meshheading:3624872-Complement System Proteins,
pubmed-meshheading:3624872-Cross-Linking Reagents,
pubmed-meshheading:3624872-Humans,
pubmed-meshheading:3624872-Macromolecular Substances,
pubmed-meshheading:3624872-Protein Binding
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pubmed:year |
1987
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pubmed:articleTitle |
Evidence that C5b recognizes and mediates C8 incorporation into the cytolytic complex of complement.
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pubmed:publicationType |
Journal Article,
Research Support, U.S. Gov't, P.H.S.,
Research Support, Non-U.S. Gov't
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