Functional differences among BRCA1 missense mutations in the control of centrosome duplication.

Functional differences among BRCA1 missense mutations in the control of centrosome duplication.
复制标题

DOI:
10.1038/onc.2011.271
复制
发表时间:
2012-02-09
期刊:
影响因子:
8
通讯作者:
Parvin, J. D.
Parvin, J. D.
中科院分区:
医学1区
文献类型:
--
作者:
Kais, Z.;Chiba, N.;Ishioka, C.;Parvin, J. D.

文献摘要

参考文献

被引文献

相似文献

我们分析了BRCA1环区14个不同的错义突变对该蛋白在组织培养细胞中心体数量控制中的作用。而在14个BRCA1变异蛋白中有2个在中心体重复分析中为中性,锌配位残基(C24R、C27A、C39Y、H41F、C44F和C47G)的错义突变以及BRCA1变体M18T和I42V的编码突变导致了导致中心体扩增的BRCA1蛋白。BRCA1变异蛋白I21V、I31M、L52F和D67Y对中心体复制起中介作用。此外,其中一个变异体L52F导致了一种特殊的表型,中心体被放大,但中心粒保持配对。相比之下,其他导致中心体扩增的BRCA1变异体有多余的中心体与未配对的中心粒聚集在一起。这一令人惊讶的表型表明,BRCA1蛋白在控制中心体复制方面调节两个功能:调节中心体数量和调节中心粒配对。L52F是不同寻常的,因为它在这些工艺中只有一个有缺陷。本研究分析了BRCA1错义突变在控制中心体复制中的作用,中心体复制是维持乳腺上皮细胞遗传稳定性的关键步骤,并表明BRCA1在控制中心粒配对中具有新的功能。
We analyzed the effects of 14 different missense mutations in the RING domain of BRCA1 on the function of the protein in the control of centrosome number in tissue culture cells. Whereas 2 of the 14 BRCA1 variant proteins were neutral in the centrosome duplication assay, missense mutations of zinc-coordinating residues (C24R, C27A, C39Y, H41F, C44F and C47G) and mutations encoding BRCA1 variants M18T and I42V resulted in BRCA1 proteins that caused centrosome amplification. BRCA1 variant proteins I21V, I31M, L52F and D67Y had an intermediate effect on centrosome duplication. In addition, one of the variants, L52F, caused a peculiar phenotype with amplified centrosomes but the centrioles remained paired. By comparison, other BRCA1 variants that caused centrosome amplification had clustering of supernumerary centrosomes with unpaired centrioles. This surprising phenotype suggests that the BRCA1 protein regulates two functions in the control of centrosome duplication: regulation of centrosome number and regulation of centriole pairing. The L52F is unusual as it is defective in only one of these processes. This study analyzes the function of BRCA1 missense mutations in the control of centrosome duplication, a critical step in the maintenance of genetic stability of mammary epithelial cells, and indicates a new function of BRCA1 in the control of centriole pairing.
DOI: 10.1086/521032
发表时间: 2007-11-01
影响因子: 9.8
作者:
Easton, Douglas F.;Deffenbaugh, Amie M.;Goldgar, David E.
通讯作者: Goldgar, David E.
DOI: 10.1073/pnas.93.24.13595
发表时间: 1996-11-26
影响因子: 11.1
作者:
Monteiro, ANA;August, A;Hanafusa, H
通讯作者: Hanafusa, H
DOI: 10.1038/sj.onc.1201861
发表时间: 1998-03-05
期刊: ONCOGENE
影响因子: 8
作者:
Jensen, DE;Proctor, M;Rauscher, FJ
通讯作者: Rauscher, FJ
DOI: 10.1158/0008-5472.can-09-2850
发表时间: 2010-02-01
期刊: Cancer research
影响因子: 11.2
作者:
Ransburgh DJ;Chiba N;Ishioka C;Toland AE;Parvin JD
通讯作者: Parvin JD
DOI: 10.1038/ng1296-430
发表时间: 1996-12-01
期刊: NATURE GENETICS
影响因子: 30.8
作者:
Wu, LJC;Wang, ZW;Baer, R
通讯作者: Baer, R