6dvz
From Proteopedia
Cryo-EM structure of mouse TRPV3-Y564A in complex with 2-Aminoethoxydiphenyl borate (2-APB)
Structural highlights
Function[TRPV3_MOUSE] Putative receptor-activated non-selective calcium permeant cation channel. It is activated by innocuous (warm) temperatures and shows an increased response at noxious temperatures greater than 39 degrees Celsius. Activation exhibits an outward rectification. May associate with TRPV1 and may modulate its activity. Is a negative regulator of hair growth and cycling: TRPV3-coupled signaling suppresses keratinocyte proliferation in hair follicles and induces apoptosis and premature hair follicle regression (catagen) (By similarity). Publication Abstract from PubMedTransient receptor potential vanilloid subfamily member 3 (TRPV3) channel plays a crucial role in skin physiology and pathophysiology. Mutations in TRPV3 are associated with various skin diseases, including Olmsted syndrome, atopic dermatitis, and rosacea. Here we present the cryo-electron microscopy structures of full-length mouse TRPV3 in the closed apo and agonist-bound open states. The agonist binds three allosteric sites distal to the pore. Channel opening is accompanied by conformational changes in both the outer pore and the intracellular gate. The gate is formed by the pore-lining S6 helices that undergo local alpha-to-pi helical transitions, elongate, rotate, and splay apart in the open state. In the closed state, the shorter S6 segments are entirely alpha-helical, expose their nonpolar surfaces to the pore, and hydrophobically seal the ion permeation pathway. These findings further illuminate TRP channel activation and can aid in the design of drugs for the treatment of inflammatory skin conditions, itch, and pain. Structure and gating mechanism of the transient receptor potential channel TRPV3.,Singh AK, McGoldrick LL, Sobolevsky AI Nat Struct Mol Biol. 2018 Sep;25(9):805-813. doi: 10.1038/s41594-018-0108-7. Epub, 2018 Aug 20. PMID:30127359[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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