Crosstalk between CST and RPA regulates RAD51 activity during replication stress.
Crosstalk between CST and RPA regulates RAD51 activity during replication stress.
复制标题
DOI:
10.1038/s41467-021-26624-x
复制
发表时间:
2021-11-05
影响因子:
16.6
通讯作者:
Chi P
中科院分区:
文献类型:
--
作者:
Lei KH;Yang HL;Chang HY;Yeh HY;Nguyen DD;Lee TY;Lyu X;Chastain M;Chai W;Li HW;Chi P
Replication stress causes replication fork stalling, resulting in an accumulation of single-stranded DNA (ssDNA). Replication protein A (RPA) and CTC1-STN1-TEN1 (CST) complex bind ssDNA and are found at stalled forks, where they regulate RAD51 recruitment and foci formation in vivo. Here, we investigate crosstalk between RPA, CST, and RAD51. We show that CST and RPA localize in close proximity in cells. Although CST stably binds to ssDNA with a high affinity at low ionic strength, the interaction becomes more dynamic and enables facilitated dissociation at high ionic strength. CST can coexist with RPA on the same ssDNA and target RAD51 to RPA-coated ssDNA. Notably, whereas RPA-coated ssDNA inhibits RAD51 activity, RAD51 can assemble a functional filament and exhibit strand-exchange activity on CST-coated ssDNA at high ionic strength. Our findings provide mechanistic insights into how CST targets and tethers RAD51 to RPA-coated ssDNA in response to replication stress. During replication stress, the RPA protein complex coats single-stranded DNA to preclude RAD51 loading. Here, the authors show how RPA and CST crosstalk to regulate RAD51 activity.
登录
查看更多内容
影响因子:
14.9
作者:
Bhattacharjee A;Wang Y;Diao J;Price CM
通讯作者:
Price CM
影响因子:
3.8
作者:
Chi, P;Van Komen, S;Sung, P
通讯作者:
Sung, P
影响因子:
64.5
作者:
Barlow JH;Faryabi RB;Callén E;Wong N;Malhowski A;Chen HT;Gutierrez-Cruz G;Sun HW;McKinnon P;Wright G;Casellas R;Robbiani DF;Staudt L;Fernandez-Capetillo O;Nussenzweig A
通讯作者:
Nussenzweig A
影响因子:
8.8
作者:
Bétous R;Couch FB;Mason AC;Eichman BF;Manosas M;Cortez D
通讯作者:
Cortez D
影响因子:
16.8
作者:
Bhat KP;Cortez D
通讯作者:
Cortez D