A/T mutagenesis in hypermutated immunoglobulin genes strongly depends on PCNAK164 modification.

A/T mutagenesis in hypermutated immunoglobulin genes strongly depends on PCNAK164 modification.
复制标题

DOI:
10.1084/jem.20070902
复制
发表时间:
2007-08-06
影响因子:
15.3
通讯作者:
Jacobs, Heinz
Jacobs, Heinz
中科院分区:
医学1区
文献类型:
--
作者:
Langerak, Petra;Nygren, Anders O. H.;Krijger, Peter H. L.;van den Berk, Paul C. M.;Jacobs, Heinz

文献摘要

参考文献

被引文献

相似文献

B细胞利用跨损伤DNA合成(TLS)在由激活诱导的胞苷脱氨酶导致的基因损伤周围引入体细胞突变。增殖细胞核抗原(PCNA)赖氨酸164位点的单泛素化(PCNAK164)刺激TLS。为了确定PCNAK164修饰在体细胞高频突变中的作用,构建了PCNAK164R基因敲入小鼠。PCNAK164R/K164R突变体以低于孟德尔频率出生。尽管PCNAK164R/K164R B细胞正常增殖和类别转换,但高频突变的免疫球蛋白(Ig)基因的突变谱发生了显著改变。模板A/T处突变的大幅减少与G/C处的代偿性增加相关,这是一种与聚合酶η(Polη)和错配修复缺陷型B细胞相似的表型。错配识别、单泛素化的PCNA和Polη可能在Ig基因复制过程中协同在模板A/T处建立突变。
B cells use translesion DNA synthesis (TLS) to introduce somatic mutations around genetic lesions caused by activation-induced cytidine deaminase. Monoubiquitination at lysine164 of proliferating cell nuclear antigen (PCNAK164) stimulates TLS. To determine the role of PCNAK164 modifications in somatic hypermutation, PCNAK164R knock-in mice were generated. PCNAK164R/K164R mutants are born at a sub-Mendelian frequency. Although PCNAK164R/K164R B cells proliferate and class switch normally, the mutation spectrum of hypermutated immunoglobulin (Ig) genes alters dramatically. A strong reduction of mutations at template A/T is associated with a compensatory increase at G/C, which is a phenotype similar to polymerase η (Polη) and mismatch repair–deficient B cells. Mismatch recognition, monoubiquitinated PCNA, and Polη likely cooperate in establishing mutations at template A/T during replication of Ig genes.
DOI: 10.1016/j.molcel.2006.05.038
发表时间: 2006-07-21
期刊: MOLECULAR CELL
影响因子: 16
作者:
Guo, Caixia;Sonoda, Eiichiro;Friedberg, Errol C.
通讯作者: Friedberg, Errol C.
DOI: 10.1084/jem.20050292
发表时间: 2005-04-18
期刊: The Journal of experimental medicine
影响因子: --
作者:
Delbos F;De Smet A;Faili A;Aoufouchi S;Weill JC;Reynaud CA
通讯作者: Reynaud CA
DOI: 10.1084/jem.187.11.1735
发表时间: 1998-06-01
期刊: The Journal of experimental medicine
影响因子: --
作者:
Jacobs H;Fukita Y;van der Horst GT;de Boer J;Weeda G;Essers J;de Wind N;Engelward BP;Samson L;Verbeek S;de Murcia JM;de Murcia G;te Riele H;Rajewsky K
通讯作者: Rajewsky K
DOI: 10.1073/pnas.0505949102
发表时间: 2005-12-20
影响因子: 11.1
作者:
Garg, P;Burgers, PM
通讯作者: Burgers, PM
DOI: 10.1101/gad.1043203
发表时间: 2003-01-01
影响因子: 10.5
作者:
Kai, M;Wang, TSF
通讯作者: Wang, TSF