CD59 únese ás células hóspede por unha áncora de glicofosfatidilinositol (GPI). Os microdominios que conteñen colesterol axudan á actividade de CD59 ao estimularen un "punto de evaxinación" na membrana lipídica durante a ensamblaxe do complexo de ataque á membrana (MAC) para impedir a formación de poros e inhibir a lise.[3] Cando a activación do sistema do complemento orixina o depósito de C5b678 nas células hóspede, o CD59 pode impedir que C9 se polimerice e forme o complexo de ataque á membrana do complemento.[4] Pode tamén enviar sinais á célula para realizar medidas activas como a endocitose do complexo CD59-C9.[2] A endocitose deste complexo leva á destrución da formación da canle iónica que este complexo proporciona ao MAC. Estas canles iónicas utilízanse para a transferencia de diferentes ións para manter a correcta concentración de minerais a un lado e outro da membrana, e sen este debido mantemento, poden producirse síntomas graves e doenzas como a dexeneración neuronal e a enfermidade de Alzheimer.[5]
Os virus como o VIH, o citomegalovirus humano e o da vaccinia incorporan o CD59 da célula hóspede na súa propia envoltura viral para impediren a súa destrución polo complemento.[8] Ademais, o investigouse o CD59 como diana para a inmunoterapia cando se tratan certos cancros, como o cancro de mama. Atopouse que unha vez que se neutralizou o CD59, prodúcese unha regulación á alza de Fas e da caspase-3, creando un aumento da apoptose e a supresión do crecemento tumoral en células MCF-7 (unha liña celular de cancro de mama).[9]
↑ 2,02,1Maio M, Brasoveanu LI, Coral S, Sigalotti L, Lamaj E, Gasparollo A, Visintin A, Altomonte M, Fonsatti E (agosto de 1998). "Structure, distribution, and functional role of protectin (CD59) in complement-susceptibility and in immunotherapy of human malignancies (Review)". International Journal of Oncology13 (2): 305–318. PMID9664126. doi:10.3892/ijo.13.2.305.
↑Huang Y, Qiao F, Abagyan R, Hazard S, Tomlinson S (setembro de 2006). "Defining the CD59-C9 binding interaction". The Journal of Biological Chemistry281 (37): 27398–27404. PMID16844690. doi:10.1074/jbc.M603690200.
↑Nevo Y, Ben-Zeev B, Tabib A, Straussberg R, Anikster Y, Shorer Z, Fattal-Valevski A, Ta-Shma A, Aharoni S, Rabie M, Zenvirt S, Goldshmidt H, Fellig Y, Shaag A, Mevorach D, Elpeleg O (xaneiro de 2013). "CD59 deficiency is associated with chronic hemolysis and childhood relapsing immune-mediated polyneuropathy". Blood121 (1): 129–135. PMID23149847. doi:10.1182/blood-2012-07-441857.
↑Bohana-Kashtan O, Ziporen L, Donin N, Kraus S, Fishelson Z (xullo de 2004). "Cell signals transduced by complement". Molecular Immunology41 (6–7): 583–597. PMID15219997. doi:10.1016/j.molimm.2004.04.007.
↑Li B, Chu X, Gao M, Xu Y (2011). "The effects of CD59 gene as a target gene on breast cancer cells". Cellular Immunology272 (1): 61–70. PMID22000275. doi:10.1016/j.cellimm.2011.09.006.
Holmes CH, Simpson KL, Okada H, Okada N, Wainwright SD, Purcell DF, Houlihan JM (xuño de 1992). "Complement regulatory proteins at the feto-maternal interface during human placental development: distribution of CD59 by comparison with membrane cofactor protein (CD46) and decay accelerating factor (CD55)". European Journal of Immunology22 (6): 1579–1585. PMID1376264. doi:10.1002/eji.1830220635.
Hahn WC, Menu E, Bothwell AL, Sims PJ, Bierer BE (xuño de 1992). "Overlapping but nonidentical binding sites on CD2 for CD58 and a second ligand CD59". Science256 (5065): 1805–1807. Bibcode:1992Sci...256.1805H. PMID1377404. doi:10.1126/science.1377404.
Ninomiya H, Sims PJ (xullo de 1992). "The human complement regulatory protein CD59 binds to the alpha-chain of C8 and to the "b"domain of C9". The Journal of Biological Chemistry267 (19): 13675–13680. PMID1377690. doi:10.1016/S0021-9258(18)42266-1.
Motoyama N, Okada N, Yamashina M, Okada H (outubro de 1992). "Paroxysmal nocturnal hemoglobinuria due to hereditary nucleotide deletion in the HRF20 (CD59) gene". European Journal of Immunology22 (10): 2669–2673. PMID1382994. doi:10.1002/eji.1830221029.
Tone M, Walsh LA, Waldmann H (outubro de 1992). "Gene structure of human CD59 and demonstration that discrete mRNAs are generated by alternative polyadenylation". Journal of Molecular Biology227 (3): 971–976. PMID1383553. doi:10.1016/0022-2836(92)90239-G.
Philbrick WM, Palfree RG, Maher SE, Bridgett MM, Sirlin S, Bothwell AL (January 1990). "The CD59 antigen is a structural homologue of murine Ly-6 antigens but lacks interferon inducibility". European Journal of Immunology20 (1): 87–92. PMID1689664. doi:10.1002/eji.1830200113.
Sawada R, Ohashi K, Anaguchi H, Okazaki H, Hattori M, Minato N, Naruto M (abril de 1990). "Isolation and expression of the full-length cDNA encoding CD59 antigen of human lymphocytes". DNA and Cell Biology9 (3): 213–220. PMID1692709. doi:10.1089/dna.1990.9.213.
Yamashina M, Ueda E, Kinoshita T, Takami T, Ojima A, Ono H, Tanaka H, Kondo N, Orii T, Okada N (outubro de 1990). "Inherited complete deficiency of 20-kilodalton homologous restriction factor (CD59) as a cause of paroxysmal nocturnal hemoglobinuria". The New England Journal of Medicine323 (17): 1184–1189. PMID1699124. doi:10.1056/NEJM199010253231707.
Sugita Y, Tobe T, Oda E, Tomita M, Yasukawa K, Yamaji N, Takemoto T, Furuichi K, Takayama M, Yano S (October 1989). "Molecular cloning and characterization of MACIF, an inhibitor of membrane channel formation of complement". Journal of Biochemistry106 (4): 555–557. PMID2606909. doi:10.1093/oxfordjournals.jbchem.a122893.
Bora NS, Gobleman CL, Atkinson JP, Pepose JS, Kaplan HJ (decembro de 1993). "Differential expression of the complement regulatory proteins in the human eye". Investigative Ophthalmology & Visual Science34 (13): 3579–3584. PMID7505007.
Kieffer B, Driscoll PC, Campbell ID, Willis AC, van der Merwe PA, Davis SJ (abril de 1994). "Three-dimensional solution structure of the extracellular region of the complement regulatory protein CD59, a new cell-surface protein domain related to snake venom neurotoxins". Biochemistry33 (15): 4471–4482. PMID7512825. doi:10.1021/bi00181a006.
Kennedy SP, Rollins SA, Burton WV, Sims PJ, Bothwell AL, Squinto SP, Zavoico GB (maio de 1994). "Protection of porcine aortic endothelial cells from complement-mediated cell lysis and activation by recombinant human CD59". Transplantation57 (10): 1494–1501. PMID7515200. doi:10.1097/00007890-199405000-00017.