A cancer-associated BRCA2 mutation reveals masked nuclear export signals controlling localization.
A cancer-associated BRCA2 mutation reveals masked nuclear export signals controlling localization.
复制标题
DOI:
10.1038/nsmb.2666
复制
发表时间:
2013-10
影响因子:
16.8
通讯作者:
Venkitaraman, Ashok R.
中科院分区:
文献类型:
--
作者:
Jeyasekharan, Anand D.;Liu, Yang;Hattori, Hiroyoshi;Pisupati, Venkat;Jonsdottir, Asta Bjork;Rajendra, Eeson;Lee, Miyoung;Sundaramoorthy, Elayanambi;Schlachter, Simon;Kaminski, Clemens F.;Rosenfeld, Yaara;Sato, Ko;Savill, Jane;Ayoub, Nabieh;Venkitaraman, Ashok R.
Germline mis-sense mutations affecting a single BRCA2 allele predispose humans to cancer. Here, we identify a protein-targeting mechanism disrupted by the cancer-associated mutation, BRCA2D2723H that controls the nuclear localization of BRCA2 and its cargo, the recombination enzyme RAD51. A nuclear export signal (NES) in BRCA2 is masked by its interaction with a partner protein, DSS1, such that point mutations impairing BRCA2-DSS1 binding render BRCA2 cytoplasmic. In turn, cytoplasmic mis-localization of mutant BRCA2 inhibits the nuclear retention of RAD51, by exposing a similar NES in RAD51 usually obscured by the BRCA2-RAD51 interaction. Thus, a series of NES-masking interactions localizes BRCA2 and RAD51 in the nucleus. Interestingly, BRCA2D2723H decreases RAD51 nuclear retention even when wildtype BRCA2 is present. Our findings suggest a mechanism for regulation of the nucleo-cytoplasmic distribution of BRCA2 and RAD51, and for its impairment by a heterozygous disease-associated mutation.
登录
查看更多内容
影响因子:
3.7
作者:
King, Tari A.;Li, Weiwei;Boyd, Jeff
通讯作者:
Boyd, Jeff
影响因子:
9.8
作者:
Goldgar, DE;Easton, DF;Couch, FJ
通讯作者:
Couch, FJ
影响因子:
16
作者:
Davies, AA;Masson, JY;West, SC
通讯作者:
West, SC
影响因子:
56.9
作者:
Frey, Steffen;Richter, Ralf P.;Goerlich, Dirk
通讯作者:
Goerlich, Dirk
影响因子:
16
作者:
Ciccia A;Elledge SJ
通讯作者:
Elledge SJ