Differences in cell-bound C8 sites on chicken erythrocytes measured by their reactivity with guinea pig and human C9. 1980

M D Boyle, and A P Gee, and M Okada, and T Borsos

Methods for preparing chicken erythrocytes (CE) with C7 bound to their surface were devised by using either the classical pathway (CEA1-7) or an activated 56hu reagent (CE567) derived from inulin-treated human serum. These intermediates were used to study the lysis of CE by functionally purified C8 and C9 isolated from guinea pig and human serum. The results indicated that GPC9 was less efficient in lysing CEA1-8 or CE5678 than HuC9. This finding was observed irrespective of the species of C8 used. Experiments designed to analyze this difference indicated that there were two functionally distinct forms of C5b-8 that were randomly distributed among the cells but differed in their ability to generate a C lesion depending on the species of C9 used to complete the reaction. The implications of these results on the mechanism of generation of C lesions are briefly discussed.

UI MeSH Term Description Entries
D007700 Kinetics The rate dynamics in chemical or physical systems.
D011817 Rabbits A burrowing plant-eating mammal with hind limbs that are longer than its fore limbs. It belongs to the family Leporidae of the order Lagomorpha, and in contrast to hares, possesses 22 instead of 24 pairs of chromosomes. Belgian Hare,New Zealand Rabbit,New Zealand Rabbits,New Zealand White Rabbit,Rabbit,Rabbit, Domestic,Chinchilla Rabbits,NZW Rabbits,New Zealand White Rabbits,Oryctolagus cuniculus,Chinchilla Rabbit,Domestic Rabbit,Domestic Rabbits,Hare, Belgian,NZW Rabbit,Rabbit, Chinchilla,Rabbit, NZW,Rabbit, New Zealand,Rabbits, Chinchilla,Rabbits, Domestic,Rabbits, NZW,Rabbits, New Zealand,Zealand Rabbit, New,Zealand Rabbits, New,cuniculus, Oryctolagus
D011951 Receptors, Complement Molecules on the surface of some B-lymphocytes and macrophages, that recognize and combine with the C3b, C3d, C1q, and C4b components of complement. Complement Receptors,Complement Receptor,Complement Receptor Type 1,Receptor, Complement
D002645 Chickens Common name for the species Gallus gallus, the domestic fowl, in the family Phasianidae, order GALLIFORMES. It is descended from the red jungle fowl of SOUTHEAST ASIA. Gallus gallus,Gallus domesticus,Gallus gallus domesticus,Chicken
D003185 Complement C8 A 150-kDa serum glycoprotein composed of three subunits with each encoded by a different gene (C8A; C8B; and C8G). This heterotrimer contains a disulfide-linked C8alpha-C8gamma heterodimer and a noncovalently associated C8beta chain. C8 is the next component to bind the C5-7 complex forming C5b-8 that binds COMPLEMENT C9 and acts as a catalyst in the polymerization of C9. C8 Complement,Complement 8,Complement Component 8,Complement Component C8 alpha,Complement Component C8 alpha Chain,Complement Component C8 beta,Complement Component C8 beta Chain,Complement Component C8 gamma,Complement Component C8 gamma Chain,C8, Complement,Complement, C8,Component 8, Complement
D003186 Complement C9 A 63-kDa serum glycoprotein encoded by gene C9. Monomeric C9 (mC9) binds the C5b-8 complex to form C5b-9 which catalyzes the polymerization of C9 forming C5b-p9 (MEMBRANE ATTACK COMPLEX) and transmembrane channels leading to lysis of the target cell. Patients with C9 deficiency suffer from recurrent bacterial infections. C9 Complement,Complement 9,Complement Component 9,C9, Complement,Complement, C9,Component 9, Complement
D004912 Erythrocytes Red blood cells. Mature erythrocytes are non-nucleated, biconcave disks containing HEMOGLOBIN whose function is to transport OXYGEN. Blood Cells, Red,Blood Corpuscles, Red,Red Blood Cells,Red Blood Corpuscles,Blood Cell, Red,Blood Corpuscle, Red,Erythrocyte,Red Blood Cell,Red Blood Corpuscle
D006168 Guinea Pigs A common name used for the genus Cavia. The most common species is Cavia porcellus which is the domesticated guinea pig used for pets and biomedical research. Cavia,Cavia porcellus,Guinea Pig,Pig, Guinea,Pigs, Guinea
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia

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