The voltage-gated calcium channel Cav1.1 is engaged in the excitation-contraction coupling of skeletal muscles. The Cav1.1 complex consists of the pore-formingsubunitα1 and auxiliarysubunitsα2δ...
The mainsubunitsof CaV, the αa1subunits, are associated with auxiliarysubunitsthat modulate expression and/or functional properties of the channel. In skeletal muscle,CaV1is composed of fivesubunits: α1S (or CaV1.1), β1, α2δ, and γ (Hagiwara and Naka, 1964).
Such details provide a deeper understanding and appreciation for Subunits Designated Cav1.
In excitable cells these channels are composed of the ion-forming pore α1 and auxiliarysubunits(β and α2δ) needed for proper trafficking and activation of the channel. Previously, we disclosed the role of Ca v1.2 α1 in mouse and human TH 2 but not T H1 cell functions and showed that knocking downCav1α1 prevents experimental asthma.
Furthermore, visual representations like the one above help us fully grasp the concept of Subunits Designated Cav1.
Voltage-gated Cav1.2 calcium channels play a crucial role in Ca2+ signaling. The pore-forming α1Csubunitis regulated by accessory Cavβsubunits, cytoplasmic proteins of various size encoded by four different genes (Cavβ1- β4) and expressed in a ...
CaV1.2 channelopathies: from arrhythmias to autism, bipolar disorder, and immunodeficiency. Pflugers Arch. 2010;460 (2):353-9. PubMed CAS Google Scholar Minor Jr DL, Findeisen F. Progress in the structural understanding of voltage-gated calcium channel (CaV) function and modulation. Channels (Austin). 2010;4 (6):459-74. Google Scholar
The β-cell is equipped with at least six voltage-gated Ca2+ (CaV) channel α1-subunitsdesignatedCaV1.2, CaV1.3, CaV2.1, CaV2.2, CaV2.3, and CaV3.1. These principalsubunits, together with certain auxiliarysubunits, assemble into different types of CaV channels conducting L-, P/Q-, N-, R-, and T-type Ca2+ currents, respectively. The β-cell shares customary mechanisms of CaV channel ...
