Funding Organization(s): National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI), National Institutes of Health/Office of the Director
Voltage-gated ion channels (VGICs) are associated with hundreds of human diseases. To date, 3D structural models of human VGICs have not been reported. We developed a 3D structural integrity metric to rank the accuracy of all VGIC structures deposited in the PDB ...
Voltage-gated ion channels (VGICs) are associated with hundreds of human diseases. To date, 3D structural models of human VGICs have not been reported. We developed a 3D structural integrity metric to rank the accuracy of all VGIC structures deposited in the PDB. The metric revealed inaccuracies in structural models built from recent single-particle, non-crystalline cryo-electron microscopy maps and enabled the building of highly accurate homology models of human Ca v channel α 1 subunits at atomic resolution. Human Ca v Mendelian mutations mostly located to segments involved in the mechanism of voltage sensing and gating within the 3D structure, with multiple mutations targeting equivalent 3D structural locations despite eliciting distinct clinical phenotypes. The models also revealed that the architecture of the ion selectivity filter is highly conserved from bacteria to humans and between sodium and calcium VGICs.
Related Citations:
Structure of the voltage-gated calcium channel Ca(v)1.1. Wu, J., Yan, Z., Li, Z., Qian, X., Lu, S., Dong, M., Zhou, Q., Yan, N. (2016) Nature 537: 191
Structure of the voltage-gated calcium channel Cav1.1 complex. Wu, J., Yan, Z., Li, Z., Yan, C., Lu, S., Dong, M., Yan, N. (2015) Science 350: aad2395
Organizational Affiliation:
Department of Biochemistry and Molecular Pharmacology, NYU Langone Health, New York, NY 10016, USA. Electronic address: timothy.cardozo@nyumc.org.
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