The auxiliary subunit Cavβ regulates calcium channel density in the plasma membrane, but the mechanism by which this occurs has been poorly defined. Altier et al. find that Cavβ prevents ubiquitination of the Cav1.2 channels by the RFP2 ubiquitin ligase and subsequent targeting of the channels for proteasomal degradation.
- Christophe Altier
- Agustin Garcia-Caballero
- Gerald W Zamponi
