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Integrin Ξ²-2
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Integrin Ξ²-2 (synonym CD18) ist ein OberflΓ€chenprotein aus der Gruppe der Integrine. Integrine sind Proteine, die Kontakte zwischen Zellen sowie Kontakte einer Zelle zum Gewebeanteil zwischen den Zellen herstellen.

Contents

β€’ Weblinks

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Eigenschaften

CD18 bindet an Integrin Ξ±-D, Integrin Ξ±-L, Integrin Ξ±-M oder Integrin Ξ±-X und bildet somit verschiedene Heterodimere. Es wird von Leukozyten gebildet. Als Heterodimer mit Integrin Ξ±-L (synonym CD11a) wird es als LFA-1 bezeichnet und bindet an ICAM 1 bis 4. Gebunden an ICAM3 leitet Ξ±-L/Ξ²-2 die Phagozytose von apoptotischen Neutrophilen durch Makrophagen ein.cite-ref-1[1] Als Heterodimer mit Integrin Ξ±-M (synonym CD11b, zusammen Macrophage-1 antigen genannt) oder Integrin Ξ±-X (synonym CD11c) entstehen Rezeptoren fΓΌr iC3b des Komplementsystems und fΓΌr Fibrinogen. Bei Ξ±-M/Ξ²-2 erfolgt eine Bindung an die Peptide P1 und P2 der Ξ³-Kette des Fibrinogens. Ξ±-M/Ξ²-2 ist weiterhin ein Rezeptor fΓΌr Faktor X. Bei Ξ±-X/Ξ²-2 erfolgt eine Bindung an die Sequenz GPR in der Ξ±-Kette des Fibrinogens. Ξ±-X/Ξ²-2 ist ein Rezeptor fΓΌr ICAM 3 und VCAM1. CD18 ist an der ZytotoxizitΓ€t von NK-Zellen beteiligt.cite-ref-2[2] Es ist an der ZelladhΓ€sion und Leukodiapedese von Leukozytencite-ref-3[3] beteiligt.cite-ref-4[4]cite-ref-5[5] CD18 ist glykosyliert und phosphoryliert.

Integrin Ξ²-2 bindet unter anderem an FHL2,cite-ref-pmid10906324-6-0[6] GNB2L1,cite-ref-pmid9442085-7-0[7] ICAM-1cite-ref-pmid10352278-8-0[8]cite-ref-pmid11279101-9-0[9]cite-ref-pmid7642561-10-0[10] und PSCD1.cite-ref-pmid9765275-11-0[11]cite-ref-pmid10835351-12-0[12]

Weblinks

β€’ MeSH Integrin Ξ²-2

Einzelnachweise

cite-note-11. ↑ E. KristΓ³f, G. Zahuczky, K. Katona, Z. DorΓ³,.. Nagy, L. FΓ©s&uu: Novel role of ICAM3 and LFA-1 in the clearance of apoptotic neutrophils by human macrophages. In: Apoptosis. Band 18, Nummer 10, Oktober 2013, S. 1235–1251, doi:10.1007/s10495-013-0873-z, PMID 23775590.
cite-note-22. ↑ D. F. Barber, M. Faure, E. O. Long: LFA-1 contributes an early signal for NK cell cytotoxicity. In: Journal of Immunology. Band 173, Nummer 6, September 2004, S. 3653–3659, PMID 15356110.
cite-note-33. ↑ Vgl. M. C. Yoder und andere: Pulmonary microcirculatory kinetics of neutrophils deficient in leukocyte-adhesion promoting glykoproteins. In: J Appl Physiol. Band 69, 1990, S. 207–213.
cite-note-44. ↑ G. Ostermann, K. S. Weber, A. Zernecke, A. SchrΓΆder, C. Weber: JAM-1 is a ligand of the beta(2) integrin LFA-1 involved in transendothelial migration of leukocytes. In: Nature Immunology. Band 3, Nummer 2, Februar 2002, S. 151–158, doi:10.1038/ni755, PMID 11812992.
cite-note-55. ↑ J. Xu, X. P. Gao, R. Ramchandran, Y. Y. Zhao, S. M. Vogel, A. B. Malik: Nonmuscle myosin light-chain kinase mediates neutrophil transmigration in sepsis-induced lung inflammation by activating beta2 integrins. In: Nature Immunology. Band 9, Nummer 8, August 2008, S. 880–886, doi:10.1038/ni.1628, PMID 18587400, PMC 2553242 (freier Volltext).
cite-note-pmid10906324-66. ↑ Wixler V, Geerts D, Laplantine E, Westhoff D, Smyth N, Aumailley M, Sonnenberg A, Paulsson M: The LIM-only protein DRAL/FHL2 binds to the cytoplasmic domain of several alpha and beta integrin chains and is recruited to adhesion complexes. In: The Journal of Biological Chemistry. 275. Jahrgang, Nr. 43, Oktober 2000, S. 33669–78, doi:10.1074/jbc.M002519200, PMID 10906324.
cite-note-pmid9442085-77. ↑ Liliental J, Chang DD: Rack1, a receptor for activated protein kinase C, interacts with integrin beta subunit. In: The Journal of Biological Chemistry. 273. Jahrgang, Nr. 4, Januar 1998, S. 2379–83, doi:10.1074/jbc.273.4.2379, PMID 9442085.
cite-note-pmid10352278-88. ↑ Kotovuori A, Pessa-Morikawa T, Kotovuori P, Nortamo P, Gahmberg CG: ICAM-2 and a peptide from its binding domain are efficient activators of leukocyte adhesion and integrin affinity. In: Journal of Immunology. 162. Jahrgang, Nr. 11, Juni 1999, S. 6613–20, PMID 10352278.
cite-note-pmid11279101-99. ↑ Lu C, Takagi J, Springer TA: Association of the membrane proximal regions of the alpha and beta subunit cytoplasmic domains constrains an integrin in the inactive state. In: The Journal of Biological Chemistry. 276. Jahrgang, Nr. 18, Mai 2001, S. 14642–8, doi:10.1074/jbc.M100600200, PMID 11279101.
cite-note-pmid7642561-1010. ↑ Huang C, Springer TA: A binding interface on the I domain of lymphocyte function-associated antigen-1 (LFA-1) required for specific interaction with intercellular adhesion molecule 1 (ICAM-1). In: The Journal of Biological Chemistry. 270. Jahrgang, Nr. 32, August 1995, S. 19008–16, doi:10.1074/jbc.270.32.19008, PMID 7642561.
cite-note-pmid9765275-1111. ↑ Rietzler M, Bittner M, Kolanus W, Schuster A, Holzmann B: The human WD repeat protein WAIT-1 specifically interacts with the cytoplasmic tails of beta7-integrins. In: The Journal of Biological Chemistry. 273. Jahrgang, Nr. 42, Oktober 1998, S. 27459–66, doi:10.1074/jbc.273.42.27459, PMID 9765275.
cite-note-pmid10835351-1212. ↑ Geiger C, Nagel W, Boehm T, van Kooyk Y, Figdor CG, Kremmer E, Hogg N, Zeitlmann L, Dierks H, Weber KS, Kolanus W: Cytohesin-1 regulates beta-2 integrin-mediated adhesion through both ARF-GEF function and interaction with LFA-1. In: The EMBO Journal. 19. Jahrgang, Nr. 11, Juni 2000, S. 2525–36, doi:10.1093/emboj/19.11.2525, PMID 10835351, PMC 212768 (freier Volltext).