AIDing antibody diversity by error-prone mismatch repair.
AIDing antibody diversity by error-prone mismatch repair.
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DOI:
10.1016/j.smim.2012.05.005
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发表时间:
2012-08
影响因子:
7.8
通讯作者:
Roa S
中科院分区:
文献类型:
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作者:
Chahwan R;Edelmann W;Scharff MD;Roa S
The creation of a highly diverse antibody repertoire requires the synergistic activity of a DNA mutator, known as activation-induced deaminase (AID), coupled with an error-prone repair process that recognizes the DNA mismatch catalyzed by AID. Instead of facilitating the canonical error-free response, which generally occurs throughout the genome, DNA mismatch repair (MMR) participates in an error-prone repair mode that promotes A:T mutagenesis and double-strand breaks at the immunoglobulin (Ig) genes. As such, MMR is capable of compounding the mutation frequency of AID activity as well as broadening the spectrum of base mutations; thereby increasing the efficiency of antibody maturation. We here review the current understanding of this MMR-mediated process and describe how the MMR signaling cascade downstream of AID diverges in a locus dependent manner and even within the Ig locus itself to differentially promote somatic hypermutation (SHM) and class switch recombination (CSR) in B cells.
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