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Photoexcited cryptochromes interact with ADA2b and SMC5 to promote the repair of DNA double-strand breaks in Arabidopsis

Nat Plants. 2023-08; 
Tongtong Guo, Minqing Liu, Li Chen, Yao Liu, Ling Li, Yupeng Li, Xiaoli Cao, Zhilei Mao, Wenxiu Wang, Hong-Quan Yang
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Proteins, Expression, Isolation and Analysis … The results show that more YFP–ADA2b was co-immunoprecipitated with SMC5–Flag in the … Prey proteins were detected with anti-His antibody (1:1,000; GenScript, A00186), and bait … Get A Quote

摘要

Cryptochromes (CRYs) act as blue-light photoreceptors that regulate development and circadian rhythms in plants and animals and as navigating magnetoreceptors in migratory birds. DNA double-strand breaks (DSBs) are the most serious type of DNA damage and threaten genome stability in all organisms. Although CRYs have been shown to respond to DNA damage, whether and how they participate in DSB repair is not well understood. Here we report that Arabidopsis CRYs promote the repair of DSBs through direct interactions with ADA2b and SMC5 in a blue-light-dependent manner to enhance their interaction. Mutations in CRYs and in ADA2b lead to similar enhanced DNA damage accumulation. In response to DNA damage, CRYs are lo... More

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