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基本情報
登録情報 | データベース: PDB / ID: 9bku | |||||||||
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タイトル | Cryo-EM structure of TRPV3 K169A in nanodiscs incubated with NASPM | |||||||||
![]() | Transient receptor potential cation channel subfamily V member 3 | |||||||||
![]() | MEMBRANE PROTEIN / tetramer / transient receptor | |||||||||
機能・相同性 | ![]() negative regulation of hair cycle / osmosensory signaling pathway / TRP channels / response to temperature stimulus / sodium channel activity / positive regulation of calcium ion import / calcium ion import across plasma membrane / actin filament organization / calcium ion transmembrane transport / calcium channel activity ...negative regulation of hair cycle / osmosensory signaling pathway / TRP channels / response to temperature stimulus / sodium channel activity / positive regulation of calcium ion import / calcium ion import across plasma membrane / actin filament organization / calcium ion transmembrane transport / calcium channel activity / lysosome / receptor complex / cilium / metal ion binding / identical protein binding / plasma membrane / cytoplasm 類似検索 - 分子機能 | |||||||||
生物種 | ![]() | |||||||||
手法 | 電子顕微鏡法 / 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 3.39 Å | |||||||||
![]() | Zhang, J. / Yuan, P. / Maksaev, G. | |||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Molecular basis of TRPV3 channel blockade by intracellular polyamines. 著者: Jingying Zhang / Peng Yuan / Colin G Nichols / Grigory Maksaev / ![]() 要旨: ThermoTRPV1-4 channels are involved in the regulation of multiple physiological processes, including thermo- and pain perception, thermoregulation, itch, and nociception and therefore tight control ...ThermoTRPV1-4 channels are involved in the regulation of multiple physiological processes, including thermo- and pain perception, thermoregulation, itch, and nociception and therefore tight control of their activity is a critical requirement for correct perception of noxious stimuli and pain. We previously reported a voltage-dependent inhibition of TRPV1-4 channels by intracellular polyamines that could be explained by high affinity spermine binding in, and passage through, the permeation path. Here, using electrophysiology and cryo-electron microscopy, we elucidate molecular details of TRPV3 blockade by endogenous spermine and its analog NASPM. We identify a high-affinity polyamine interaction site at the intracellular side of the pore, formed by residues E679 and E682, with no significant contribution of residues at the channel selectivity filter. A cryo-EM structure of TRPV3 in the presence of NASPM reveals conformational changes coupled to polyamine blockade. Paradoxically, although the TRPV3 'gating switch' is in the 'activated' configuration, the pore is closed at both gates. A modified blocking model, in which spermine interacts with the cytoplasmic entrance to the channel, from which spermine may permeate, or cause closure of the channel, provides a unifying explanation for electrophysiological and structural data and furnishes the essential background for further exploitation of this regulatory process. | |||||||||
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非結晶学的対称性 (NCS) | NCSドメイン:
NCSドメイン領域: Ens-ID: ens_1
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