Regulating antigen-receptor gene assembly

被引:119
作者
Schlissel, MS [1 ]
机构
[1] Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA
基金
美国国家卫生研究院;
关键词
D O I
10.1038/nri1225
中图分类号
R392 [医学免疫学]; Q939.91 [免疫学];
学科分类号
100102 ;
摘要
The genes encoding antigen receptors are unique because of their high diversity and their assembly in developing lymphocytes from gene segments through a series of site-specific DNA recombination reactions known as V(D)J rearrangement. This review focuses on our understanding of how recombination of immunoglobulin and T-cell receptor gene segments is tightly regulated despite being catalysed by a common lymphoid recombinase, which recognizes a widely distributed conserved recombination signal sequence. Probable mechanisms involve precise expression of the lymphoid-restricted recombination-activating genes RAG1 and RAG2, and developmentally regulated epigenetic alterations in template accessibility, which are targeted by transcriptional regulatory elements and involve chromatin-modifying enzymes.
引用
收藏
页码:890 / 899
页数:10
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