A plant-specific module for homologous recombination repair.
A plant-specific module for homologous recombination repair.
复制标题
用于同源重组修复的植物特异性模块
DOI:
10.1073/pnas.2202970119
复制
发表时间:
2022-04-19
影响因子:
11.1
通讯作者:
中科院分区:
文献类型:
--
作者:
DNA damage causes genome instability and numerous diseases including cancers. Homologous recombination repair (HR) is an error-free pathway to repair DNA double-strand breaks, the most serious forms of DNA damage. However, the HR mechanisms in plants are still poorly understood. The transcription factor SOG1 is a master regulator of plant DNA damage responses. In this study, we find that a plant-specific ubiquitin E3 ligase DDRM1 ubiquitinates and stabilizes SOG1 to promote HR. Therefore, DDRM1- SOG1 is a plant-specific module for HR. DDRM1 is an evolutionarily ancient protein, which is identified in mosses, the first land plants, indicating that DNA damage response is an important mechanism for plant evolution from aquatic to land. Homologous recombination repair (HR) is an error-free DNA damage repair pathway to maintain genome stability and a basis of gene targeting using genome-editing tools. However, the mechanisms of HR in plants are still poorly understood. Through genetic screens for DNA damage response mutants (DDRM) in Arabidopsis, we find that a plant-specific ubiquitin E3 ligase DDRM1 is required for HR. DDRM1 contains an N-terminal BRCT (BRCA1 C-terminal) domain and a C-terminal RING (really interesting new gene) domain and is highly conserved in plants including mosses. The ddrm1 mutant is defective in HR and thus is hypersensitive to DNA-damaging reagents. Biochemical studies reveal that DDRM1 interacts with and ubiquitinates the transcription factor SOG1, a plant-specific master regulator of DNA damage responses. Interestingly, DDRM1-mediated ubiquitination promotes the stability of SOG1. Consistently, genetic data support that SOG1 functions downstream of DDRM1. Our study reveals that DDRM1-SOG1 is a plant-specific module for HR and highlights the importance of ubiquitination in HR.
登录
查看更多内容
影响因子:
64.8
作者:
Keskin H;Shen Y;Huang F;Patel M;Yang T;Ashley K;Mazin AV;Storici F
通讯作者:
Storici F
影响因子:
64.8
作者:
Ma, Xiyu;Claus, Lucas A. N.;Shan, Libo
通讯作者:
Shan, Libo
影响因子:
7.2
作者:
Marechal, Alexandre;Zou, Lee
通讯作者:
Zou, Lee
影响因子:
7.2
作者:
Clough, SJ;Bent, AF
通讯作者:
Bent, AF
影响因子:
10.7
作者:
Kumar, Sudhir;Stecher, Glen;Tamura, Koichiro
通讯作者:
Tamura, Koichiro