Weiss, NorbertDe Waard, MichelZamponi, Gerald W.2018-05-292018-05-292012-03-12Weiss, N., Zamponi, G. W., & De Waard, M. (2012). How do T-type calcium channels control low-threshold exocytosis? Communicative and Integrative Biology, 5(4), 377–380. https://doi.org/10.4161/cib.1999http://hdl.handle.net/1880/106701https://doi.org/10.11575/PRISM/43793Low-voltage-activated T-type calcium channels act as a major pathway for calcium entry near the resting membrane potential in a wide range of neuronal cell types. Several reports have uncovered an unrecognized feature of T-type channels in the control of vesicular neurotransmitter and hormone release, a process so far thought to be mediated exclusively by high-voltage-activated calcium channels. However, the underlying molecular mechanisms linking T-type calcium channels to vesicular exocytosis have remained enigmatic. In a recent study, we have reported that Ca(v)3.2 T-type channel forms a signaling complex with the neuronal Q-SNARE syntaxin-1A and SNAP-25. This interaction that relies on specific Ca(v)3.2 molecular determinants, not only modulates T-type channel activity, but was also found essential to support low-threshold exocytosis upon Ca(v)3.2 channel expression in MPC 9/3L-AH chromaffin cells. Overall, we have indentified an unrecognized regulation pathway of T-type calcium channels by SNARE proteins, and proposed the first molecular mechanism by which T-type channels could mediate low-threshold exocytosis.enjournal articlehttp://dx.doi.org/10.4161/cib.19997