hCAS / CSE 1L regulates RAD 51 distribution and focus formation for homologous recombinational repair

Homologous recombinational repair ( HR ) is one of the major repair systems for DNA double‐strand breaks. RAD 51 is a key molecule in HR , and the RAD 51 concentration in the cell nucleus increases after DNA damage induction. However, the mechanism that regulates the intracellular distribution of RA...

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Veröffentlicht in:Genes to cells : devoted to molecular & cellular mechanisms 2015-09, Vol.20 (9), p.681-694
Hauptverfasser: Okimoto, Satoshi, Sun, Jiying, Fukuto, Atsuhiko, Horikoshi, Yasunori, Matsuda, Shun, Matsuda, Tomonari, Ikura, Masae, Ikura, Tsuyoshi, Machida, Shinichi, Kurumizaka, Hitoshi, Miyamoto, Yoichi, Oka, Masahiro, Yoneda, Yoshihiro, Kiuchi, Yoshiaki, Tashiro, Satoshi
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container_end_page 694
container_issue 9
container_start_page 681
container_title Genes to cells : devoted to molecular & cellular mechanisms
container_volume 20
creator Okimoto, Satoshi
Sun, Jiying
Fukuto, Atsuhiko
Horikoshi, Yasunori
Matsuda, Shun
Matsuda, Tomonari
Ikura, Masae
Ikura, Tsuyoshi
Machida, Shinichi
Kurumizaka, Hitoshi
Miyamoto, Yoichi
Oka, Masahiro
Yoneda, Yoshihiro
Kiuchi, Yoshiaki
Tashiro, Satoshi
description Homologous recombinational repair ( HR ) is one of the major repair systems for DNA double‐strand breaks. RAD 51 is a key molecule in HR , and the RAD 51 concentration in the cell nucleus increases after DNA damage induction. However, the mechanism that regulates the intracellular distribution of RAD 51 is still unclear. Here, we show that hCAS / CSE 1L associates with RAD 51 in human cells. We found that hCAS / CSE 1L negatively regulates the nuclear protein level of RAD 51 under normal conditions. hCAS / CSE 1L is also required to repress the DNA damage‐induced focus formation of RAD 51. Moreover, we show that hCAS / CSE 1L plays roles in the regulation of the HR activity and in chromosome stability. These findings suggest that hCAS / CSE 1L is responsible for controlling the HR activity by directly interacting with RAD 51.
doi_str_mv 10.1111/gtc.12262
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title hCAS / CSE 1L regulates RAD 51 distribution and focus formation for homologous recombinational repair
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