
Overview:
CaM Kinase II (also known as CAMK2 and calcium/calmodulin-dependent protein kinase type II alpha chain) is a prominent kinase in the central nervous system that may function in the long-term potentiation of neurotransmitter release. CaM Kinase II autophosphorylates itself at Thr-286 which allows the kinase to switch from a calmodulin-dependent to a calmodulin-independent state. CaM Kinase II is composed of four different chains: alpha, beta, gamma, and delta. The different isoforms assemble into homo- or heteromultimeric holoenzymes composed of 8 to 12 subunits. This kinase is expressed in brain tissue. Alternative splicing occurs for this gene product.
References:
1. Lin,C.R., et al.: Molecular cloning of a brain-specific calcium/calmodulin-dependent protein kinase. Proc. Natl. Acad. Sci. U.S.A. 1987: 84 (16); 5962-5966. 2. Bulleit,R.F., et al.: Conserved and variable regions in the subunits of brain type II Ca2+/calmodulin-dependent protein kinase. Neuron 1. 1988: (1); 63-72.Hanley,R.M., et al.: Functional analysis of a complementary DNA for the 50-kilodalton subunit of calmodulin kinase II. Science.1987: 237 (4812); 293-297.
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二、补体(complement,C)是存在于正常人和动物血清与组织液中的一组经活化后具有酶活性的蛋白质。早在19世纪末Bordet即证实,新鲜血液中含有一种不耐热的成分,可辅助和补充特异性抗体,介导免疫溶菌、溶血作用,故称为补体。补体是由30余种可溶性蛋白、膜结合性蛋白和补体受体组成的多分子系统,故称为补体系统(complementsystem)。根据补体系统各成分的生物学功能,可将其分为补体固有成分、补体调控成分和补体受体(CR)。

