Comparative functional evolution of human and mouse CR1 and CR2.

Comparative functional evolution of human and mouse CR1 and CR2.
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DOI:
10.4049/jimmunol.181.5.2953
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发表时间:
2008-09-01
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Weis JH
Weis JH
中科院分区:
其他
文献类型:
--
作者:
Jacobson AC;Weis JH

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补体级联反应受一系列抑制补体转化酶活性的蛋白质调控。这些调节蛋白大多具有C3b和/或C4b结合位点,大致可分为两组,一组控制细胞表面不适当的补体转化酶活性,另一组控制血清中免疫复合物上的转化酶活性。在这篇综述中,我们着重对人和小鼠的CR1和CR2蛋白进行结构和功能比较。在小鼠中,单个基因编码这些蛋白,而人类则需要两个基因。对缺乏CR1/CR2蛋白的小鼠的分析表明,在淋巴组织免疫复合物中,这些蛋白对于调节补体转化酶活性是必需的,而这种调节是其他膜结合或血清调节蛋白无法有效控制的。
The complement cascade is regulated by a series of proteins that inhibit complement convertase activity. These regulatory proteins, most of which possess binding sites for C3b and/or C4b, can be roughly divided into two groups, one that controls inappropriate complement convertase activity on the surface of cells, and another that controls convertase activity on immune complexes in serum. In this review we focus upon the structural and functional comparisons of the CR1 and CR2 proteins of man and mouse. A single gene encodes these proteins in the mouse while the human requires two. The analysis of mice lacking the CR1/CR2 proteins demonstrates the requirement of these proteins for the regulation of complement convertase activity within lymphatic tissue immune complexes that is not efficiently controlled by other membrane bound or serum regulatory proteins.
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