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首页> 外文期刊>Molecular and Cellular Biology >The BCL11A Transcription Factor Directly Activates RAG Gene Expression and V(D)J Recombination
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The BCL11A Transcription Factor Directly Activates RAG Gene Expression and V(D)J Recombination

机译:BCL11A转录因子直接激活RAG基因表达和V(D)J重组。

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Recombination-activating gene 1 protein (RAG1) and RAG2 are critical enzymes for initiating variable-diversity-joining (VDJ) segment recombination, an essential process for antigen receptor expression and lymphocyte development. The transcription factor BCL11A is required for B cell development, but its molecular function(s) in B cell fate specification and commitment is unknown. We show here that the major B cell isoform, BCL11A-XL, binds the RAG1 promoter and Erag enhancer to activate RAG1 and RAG2 transcription in pre-B cells. We employed BCL11A overexpression with recombination substrates in a cultured pre-B cell line as well as Cre recombinase-mediated Bcl11alox/lox deletion in explanted murine pre-B cells to demonstrate direct consequences of BCL11A/RAG modulation on V(D)J recombination. We conclude that BCL11A is a critical component of a transcriptional network that regulates B cell fate by controlling V(D)J recombination.
机译:重组激活基因1蛋白(RAG1)和RAG2是用于启动可变多样性连接(VDJ)段重组的关键酶,这是抗原受体表达和淋巴细胞发育的重要过程。转录因子BCL11A是B细胞发育所必需的,但其分子功能在B细胞命运规范和承诺中尚不清楚。我们在这里显示主要的B细胞同种型BCL11A-XL结合 RAG1 启动子和 Erag 增强子来激活RAG1和 RAG2 转录。 -B细胞。我们将BCL11A过表达与重组底物一起用于已培养的pre-B细胞系中,并利用Cre重组酶介导的 Bcl11a lox / lox 缺失进行了移植鼠前B细胞来证明BCL11A / RAG调制对V(D)J重组的直接后果。我们得出结论,BCL11A是转录网络的关键组成部分,该转录网络通过控制V(D)J重组来调节B细胞的命运。

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