Structural Analyses of the Transient Receptor Potential Channels TRPV3 and TRPV6
January 2019
in “
Columbia Academic Commons (Columbia University)
”
TLDR TRPV3 and TRPV6 channels change structure to regulate calcium and heat responses.
The study focused on the structural analysis of TRPV3 and TRPV6, two members of the vanilloid subfamily of transient receptor potential (TRP) channels. TRPV6, involved in intestinal calcium absorption, was analyzed using cryo-electron microscopy to reveal its open and closed states, showing that its transition involves the formation of π-helices that widen the pore. TRPV6 is regulated by calmodulin (CaM), which binds to the channel and blocks it to prevent calcium overload. TRPV3, a heat-activated channel expressed in keratinocytes, was studied in both closed and open states, revealing structural changes that suggest a model for its regulation by 2-APB. These findings provided insights into the regulatory and gating mechanisms of these channels, contributing to the understanding of their physiological roles.
