Regulation of DNA damage response by trimeric G-proteins.
Regulation of DNA damage response by trimeric G-proteins.
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调节三聚体G蛋白的DNA损伤反应。
DOI:
10.1016/j.isci.2023.105973
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发表时间:
2023-02-17
期刊:
影响因子:
5.8
通讯作者:
Ghosh, Pradipta
中科院分区:
文献类型:
--
作者:
Abd El-Hafeez, Amer Ali;Sun, Nina;Chakraborty, Anirban;Ear, Jason;Roy, Suchismita;Chamarthi, Pranavi;Rajapakse, Navin;Das, Soumita;Luker, Kathryn E.;Hazra, Tapas K.;Luker, Gary D.;Ghosh, Pradipta
Upon sensing DNA double-strand breaks (DSBs), eukaryotic cells either die or repair DSBs via one of the two competing pathways, i.e., non-homologous end-joining (NHEJ) or homologous recombination (HR). We show that cell fate after DSBs hinges on GIV/Girdin, a guanine nucleotide-exchange modulator of heterotrimeric Giα•βγ protein. GIV suppresses HR by binding and sequestering BRCA1, a key coordinator of multiple steps within the HR pathway, away from DSBs; it does so using a C-terminal motif that binds BRCA1’s BRCT-modules via both phospho-dependent and -independent mechanisms. Using another non-overlapping C-terminal motif GIV binds and activates Gi and enhances the “free” Gβγ→PI-3-kinase→Akt pathway, which promotes survival and is known to suppress HR, favor NHEJ. Absence of GIV, or loss of either of its C-terminal motifs enhanced cell death upon genotoxic stress. Because GIV selectively binds other BRCT-containing proteins suggests that G-proteins may fine-tune sensing, repair, and survival after diverse types of DNA damage. Non-receptor G protein modulator, GIV/Girdin binds BRCA1 Binding occurs in both canonical and non-canonical modes GIV sequesters BRCA1 away from dsDNA breaks, suppresses HR Activation of Gi by GIV enhances Akt, suppresses HR, favors NHEJ Biological sciences; Cell biology; Molecular biology.
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影响因子:
19
作者:
Ceccaldi R;Rondinelli B;D'Andrea AD
通讯作者:
D'Andrea AD
DOI:
10.1016/j.jbc.2021.100493
发表时间:
2021-01
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Ear J;Abd El-Hafeez AA;Roy S;Ngo T;Rajapakse N;Choi J;Khandelwal S;Ghassemian M;McCaffrey L;Kufareva I;Sahoo D;Ghosh P
通讯作者:
Ghosh P
影响因子:
--
作者:
Brandsma I;Gent DC
通讯作者:
Gent DC
影响因子:
4.8
作者:
Anai, M;Shojima, N;Asano, T
通讯作者:
Asano, T
影响因子:
4.8
作者:
Ayala-Torres, S;Chen, YM;Van Houten, B
通讯作者:
Van Houten, B