+Search query
-Structure paper
Title | An Improved Method for Modeling Voltage-Gated Ion Channels at Atomic Accuracy Applied to Human Ca Channels. |
---|---|
Journal, issue, pages | Cell Rep, Vol. 23, Issue 5, Page 1399-1408, Year 2018 |
Publish date | May 1, 2018 |
Authors | Wilnelly Martinez-Ortiz / Timothy J Cardozo / |
PubMed Abstract | 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 ...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 channel α subunits at atomic resolution. Human Ca 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. |
External links | Cell Rep / PubMed:29719253 / PubMed Central |
Methods | EM (single particle) |
Resolution | 3.6 Å |
Structure data | PDB-6byo: |
Source |
|
Keywords | MEMBRANE PROTEIN / Voltage-Gated Calcium Channels |