KBTBD13 interacts with Cullin 3 to form a functional ubiquitin ligase.

KBTBD13 interacts with Cullin 3 to form a functional ubiquitin ligase.
复制标题

DOI:
10.1016/j.bbrc.2012.04.074
复制
发表时间:
2012-05-18
影响因子:
3.1
通讯作者:
Maynard E
Maynard E
中科院分区:
生物学4区
文献类型:
--
作者:
Sambuughin N;Swietnicki W;Techtmann S;Matrosova V;Wallace T;Goldfarb L;Maynard E

文献摘要

参考文献

被引文献

相似文献

BTB和Kelch结构域13蛋白(KBTBD13)常染色体显性突变与一种新型线状线状肌病(NEM)相关。NEM是一种基因异质性的肌肉疾病。引起表型不同的NEM变异的突变先前已在肌肉细丝成分中被确定。KBTBD13是一种肌肉特异性蛋白,由N端BTB结构域和C端Kelch-repeat结构域组成。这种新发现的蛋白质在肌肉中的功能尚不清楚。在这项研究中,我们发现KBTBD13与Cullin 3 (Cul3)相互作用,BTB结构域介导这种相互作用。通过泛素化实验,我们确定KBTBD13参与了一个基于Cul3的环泛素连接酶(Cul3- rl)的形成,该环泛素连接酶能够结合泛素。瞬时表达的KBTBD13共聚焦显微镜显示其与泛素共定位。综上所述,我们的研究结果表明,KBTBD13是Cul3-RL的一个假定的底物接头,其功能是肌肉特异性泛素连接酶,从而暗示了KBTBD13相关NEM发病机制中的泛素蛋白酶体途径。
Autosomal dominant mutations in BTB and Kelch domain containing 13 protein (KBTBD13) are associated with a new type of Nemaline Myopathy (NEM). NEM is a genetically heterogeneous group of muscle disorders. Mutations causing phenotypically distinct NEM variants have previously been identified in components of muscle thin filament. KBTBD13 is a muscle specific protein composed of an N terminal BTB domain and a C terminal Kelch-repeat domain. The function of this newly identified protein in muscle remained unknown. In this study, we show that KBTBD13 interacts with Cullin 3 (Cul3) and the BTB domain mediates this interaction. Using ubiquitination assays, we determined that KBTBD13 participates in the formation of a Cul3 based RING ubiquitin ligase (Cul3-RL) capable of ubiquitin conjugation. Confocal microscopy of transiently expressed KBTBD13 revealed its co-localization with ubiquitin. Taken together, our results demonstrate that KBTBD13 is a putative substrate adaptor for Cul3-RL that functions as a muscle specific ubiquitin ligase, and thereby implicate the ubiquitin proteasome pathway in the pathogenesis of KBTBD13-associated NEM.
DOI: 10.1126/science.284.5414.657
发表时间: 1999-04-23
期刊: SCIENCE
影响因子: 56.9
作者:
Kamura, T;Koepp, DM;Conway, JW
通讯作者: Conway, JW
DOI: 10.1016/s0006-3495(00)76713-0
发表时间: 2000-03-01
影响因子: 3.4
作者:
Schuck, P
通讯作者: Schuck, P
DOI: 10.1073/pnas.96.16.9124
发表时间: 1999-08-03
影响因子: 11.1
作者:
Galan, JM;Peter, M
通讯作者: Peter, M
DOI: 10.1002/mus.21788
发表时间: 2010-12-01
期刊: MUSCLE & NERVE
影响因子: 3.4
作者:
Olive, Montse;Goldfarb, Lev G.;Sambuughin, Nyamkhishig
通讯作者: Sambuughin, Nyamkhishig
DOI: 10.1186/gb-2005-6-10-r82
发表时间: 2005
期刊: GENOME BIOLOGY
影响因子: 12.3
作者:
Stogios, Peter J;Downs, Gregory S;Jauhal, Jimmy J S;Nandra, Sukhjeen K;Prive, Gilbert G
通讯作者: Prive, Gilbert G