@article{168146, keywords = {Animals, Protein Structure, Tertiary, Molecular Sequence Data, Amino Acid Sequence, Cell Membrane, Protein Structure, Secondary, Cryoelectron Microscopy, Rabbits, Protein Multimerization, Protein Subunits, Muscle, Skeletal, Calcium Channels, L-Type}, author = {Jianping Wu and Zhen Yan and Zhangqiang Li and Chuangye Yan and Shan Lu and Mengqiu Dong and Nieng Yan}, title = {Structure of the voltage-gated calcium channel Cav1.1 complex}, abstract = {
The voltage-gated calcium channel Ca(v)1.1 is engaged in the excitation-contraction coupling of skeletal muscles. The Ca(v)1.1 complex consists of the pore-forming subunit α1 and auxiliary subunits α2δ, β, and γ. We report the structure of the rabbit Ca(v)1.1 complex determined by single-particle cryo-electron microscopy. The four homologous repeats of the α1 subunit are arranged clockwise in the extracellular view. The γ subunit, whose structure resembles claudins, interacts with the voltage-sensing domain of repeat IV (VSD(IV)), whereas the cytosolic β subunit is located adjacent to VSD(II) of α1. The α2 subunit interacts with the extracellular loops of repeats I to III through its VWA and Cache1 domains. The structure reveals the architecture of a prototypical eukaryotic Ca(v) channel and provides a framework for understanding the function and disease mechanisms of Ca(v) and Na(v) channels.
}, year = {2015}, journal = {Science}, volume = {350}, pages = {aad2395}, month = {12/2015}, issn = {1095-9203}, doi = {10.1126/science.aad2395}, language = {eng}, }