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THE MEMBRANE ATTACK MECHANISM OF COMPLEMENT : REVERSIBLE INTERACTIONS AMONG THE FIVE NATIVE COMPONENTS IN FREE SOLUTION

Reversible interactions in free solution were demonstrated to occur (a) between C5 and C8, (b) between C5, 6, 7 and C8, and (c) between C8 and C9. No interaction was observed between C8 and C6 or C7 and between C9 and C5, 6, 7. Interactions between C8 and C9 were enhanced at lowered ionic strength (...

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Autores principales: Kolb, William P., Haxby, James A., Arroyave, Carlos M., Müller-Eberhard, Hans J.
Formato: Texto
Lenguaje:English
Publicado: The Rockefeller University Press 1973
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2139403/
https://www.ncbi.nlm.nih.gov/pubmed/4737061
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author Kolb, William P.
Haxby, James A.
Arroyave, Carlos M.
Müller-Eberhard, Hans J.
author_facet Kolb, William P.
Haxby, James A.
Arroyave, Carlos M.
Müller-Eberhard, Hans J.
author_sort Kolb, William P.
collection PubMed
description Reversible interactions in free solution were demonstrated to occur (a) between C5 and C8, (b) between C5, 6, 7 and C8, and (c) between C8 and C9. No interaction was observed between C8 and C6 or C7 and between C9 and C5, 6, 7. Interactions between C8 and C9 were enhanced at lowered ionic strength (0.05) and a molar excess of C8 over C9. Complex formation was independent of pH over the range of 6.5–8.5. Under optimal conditions the C8, 9 complex had a sedimentation coefficient of 10.2–10.6S, while native C8 and C9 sedimented at 8.5 and 4.8S, respectively. Specificity and reversibility of these interactions were established. In spite of the limited number of interactions observed, all five of the native proteins of the membrane attack mechanism interacted to form an association product that sedimented at 10.8–11.2S. Demonstration of this product in free solution supports the concept that C5-9 on acquisition of cytolytic activity assemble into a stable multimolecular complex.
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spelling pubmed-21394032008-04-17 THE MEMBRANE ATTACK MECHANISM OF COMPLEMENT : REVERSIBLE INTERACTIONS AMONG THE FIVE NATIVE COMPONENTS IN FREE SOLUTION Kolb, William P. Haxby, James A. Arroyave, Carlos M. Müller-Eberhard, Hans J. J Exp Med Article Reversible interactions in free solution were demonstrated to occur (a) between C5 and C8, (b) between C5, 6, 7 and C8, and (c) between C8 and C9. No interaction was observed between C8 and C6 or C7 and between C9 and C5, 6, 7. Interactions between C8 and C9 were enhanced at lowered ionic strength (0.05) and a molar excess of C8 over C9. Complex formation was independent of pH over the range of 6.5–8.5. Under optimal conditions the C8, 9 complex had a sedimentation coefficient of 10.2–10.6S, while native C8 and C9 sedimented at 8.5 and 4.8S, respectively. Specificity and reversibility of these interactions were established. In spite of the limited number of interactions observed, all five of the native proteins of the membrane attack mechanism interacted to form an association product that sedimented at 10.8–11.2S. Demonstration of this product in free solution supports the concept that C5-9 on acquisition of cytolytic activity assemble into a stable multimolecular complex. The Rockefeller University Press 1973-08-01 /pmc/articles/PMC2139403/ /pubmed/4737061 Text en Copyright © 1973 by The Rockefeller University Press This article is distributed under the terms of an Attribution–Noncommercial–Share Alike–No Mirror Sites license for the first six months after the publication date (see http://www.rupress.org/terms). After six months it is available under a Creative Commons License (Attribution–Noncommercial–Share Alike 4.0 Unported license, as described at http://creativecommons.org/licenses/by-nc-sa/4.0/).
spellingShingle Article
Kolb, William P.
Haxby, James A.
Arroyave, Carlos M.
Müller-Eberhard, Hans J.
THE MEMBRANE ATTACK MECHANISM OF COMPLEMENT : REVERSIBLE INTERACTIONS AMONG THE FIVE NATIVE COMPONENTS IN FREE SOLUTION
title THE MEMBRANE ATTACK MECHANISM OF COMPLEMENT : REVERSIBLE INTERACTIONS AMONG THE FIVE NATIVE COMPONENTS IN FREE SOLUTION
title_full THE MEMBRANE ATTACK MECHANISM OF COMPLEMENT : REVERSIBLE INTERACTIONS AMONG THE FIVE NATIVE COMPONENTS IN FREE SOLUTION
title_fullStr THE MEMBRANE ATTACK MECHANISM OF COMPLEMENT : REVERSIBLE INTERACTIONS AMONG THE FIVE NATIVE COMPONENTS IN FREE SOLUTION
title_full_unstemmed THE MEMBRANE ATTACK MECHANISM OF COMPLEMENT : REVERSIBLE INTERACTIONS AMONG THE FIVE NATIVE COMPONENTS IN FREE SOLUTION
title_short THE MEMBRANE ATTACK MECHANISM OF COMPLEMENT : REVERSIBLE INTERACTIONS AMONG THE FIVE NATIVE COMPONENTS IN FREE SOLUTION
title_sort membrane attack mechanism of complement : reversible interactions among the five native components in free solution
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2139403/
https://www.ncbi.nlm.nih.gov/pubmed/4737061
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