Generation and repair of AID-initiated DNA lesions in B lymphocytes.
Generation and repair of AID-initiated DNA lesions in B lymphocytes.
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DOI:
10.1007/s11684-014-0324-4
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发表时间:
2014-06
影响因子:
8.1
通讯作者:
Wang, Jing H.
中科院分区:
文献类型:
--
作者:
Chen, Zhangguo;Wang, Jing H.
关键词:
Activation-induced deaminase (AID) initiates the secondary antibody diversification process in B lymphocytes. In mammalian B cells, this process includes somatic hypermutation (SHM) and class switch recombination (CSR), both of which require AID. AID induces U:G mismatch lesions in DNA that are subsequently converted into point mutations or DNA double stranded breaks during SHM/CSR. In a physiological context, AID targets immunoglobulin (Ig) loci to mediate SHM/CSR. However, recent studies reveal genome-wide access of AID to numerous non-Ig loci. Thus, AID poses a threat to the genome of B cells if AID-initiated DNA lesions cannot be properly repaired. In this review, we focus on the molecular mechanisms that regulate the specificity of AID targeting and the repair pathways responsible for processing AID-initiated DNA lesions.
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