Dystrophin contains multiple independent membrane-binding domains.
Dystrophin contains multiple independent membrane-binding domains.
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肌养蛋白含有多个独立的膜结合域。
DOI:
10.1093/hmg/ddw210
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发表时间:
2016
影响因子:
3.5
通讯作者:
Lai,Yi
中科院分区:
文献类型:
--
作者:
Zhao,Junling;Kodippili,Kasun;Yue,Yongping;Hakim,ChadyH;Wasala,Lakmini;Pan,Xiufang;Zhang,Keqing;Yang,NoraN;Duan,Dongsheng;Lai,Yi
Dystrophin is a large sub-sarcolemmal protein. Its absence leads to Duchenne muscular dystrophy (DMD). Binding to the sarcolemma is essential for dystrophin to protect muscle from contraction-induced injury. It has long been thought that membrane binding of dystrophin depends on its cysteine-rich (CR) domain. Here, we providein vivoevidence suggesting that dystrophin contains three additional membrane-binding domains including spectrin-like repeats (R)1-3, R10-12 and C-terminus (CT). To systematically study dystrophin membrane binding, we split full-length dystrophin into ten fragments and examined subcellular localizations of each fragment by adeno-associated virus-mediated gene transfer. In skeletal muscle, R1-3, CR domain and CT were exclusively localized at the sarcolemma. R10-12 showed both cytosolic and sarcolemmal localization. Importantly, the CR-independent membrane binding was conserved in murine and canine muscles. A critical function of the CR-mediated membrane interaction is the assembly of the dystrophin-associated glycoprotein complex (DGC). While R1-3 and R10-12 did not restore the DGC, surprisingly, CT alone was sufficient to establish the DGC at the sarcolemma. Additional studies suggest that R1-3 and CT also bind to the sarcolemma in the heart, though relatively weak. Taken together, our study provides the first conclusivein vivoevidence that dystrophin contains multiple independent membrane-binding domains. These structurally and functionally distinctive membrane-binding domains provide a molecular framework for dystrophin to function as a shock absorber and signaling hub. Our results not only shed critical light on dystrophin biology and DMD pathogenesis, but also provide a foundation for rationally engineering minimized dystrophins for DMD gene therapy.
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DOI:
10.1172/jci115640
发表时间:
1992
期刊:
The Journal of clinical investigation
影响因子:
--
作者:
D. Récan;Philippe Chafey;F. Leturcq;J. Hugnot;Nathalie Vincent;Fernando;Tom;Huguette;Collin;Dominique;Simon;Paul Czernichow;B. LouiseV.;Nicholson;Michel Fardeau;Jean;Jamel Chelly
通讯作者:
Jamel Chelly
影响因子:
3.5
作者:
D. Rapaport;D. Greenberg;M. Tal;D. Yaffe;U. Nudel
通讯作者:
U. Nudel
影响因子:
3
作者:
M. Maconochie;A. H. Simpkins;E. Damien;G. Coulton;A. Greenfield;S. Brown
通讯作者:
S. Brown
影响因子:
4.8
作者:
B. Yang;D. Jung;J. Rafael;J. Chamberlain;K. Campbell
通讯作者:
K. Campbell
DOI:
10.1074/jbc.270.10.4975
发表时间:
1995
期刊:
The Journal of Biological Chemistry
影响因子:
--
作者:
Bin Yang;D. Jung;J. Rafael;J. Chamberlain;K. Campbell
通讯作者:
K. Campbell