Voltage gated calcium channel / N-type / complex / MEMBRANE PROTEIN
機能・相同性
機能・相同性情報
regulation of membrane repolarization during action potential / Presynaptic depolarization and calcium channel opening / Phase 2 - plateau phase / calcium ion transmembrane transport via high voltage-gated calcium channel / positive regulation of muscle contraction / high voltage-gated calcium channel activity / membrane depolarization during bundle of His cell action potential / L-type voltage-gated calcium channel complex / host cell presynaptic membrane / NCAM1 interactions ...regulation of membrane repolarization during action potential / Presynaptic depolarization and calcium channel opening / Phase 2 - plateau phase / calcium ion transmembrane transport via high voltage-gated calcium channel / positive regulation of muscle contraction / high voltage-gated calcium channel activity / membrane depolarization during bundle of His cell action potential / L-type voltage-gated calcium channel complex / host cell presynaptic membrane / NCAM1 interactions / cardiac muscle cell action potential involved in contraction / regulation of ventricular cardiac muscle cell membrane repolarization / calcium ion transport into cytosol / regulation of calcium ion transmembrane transport via high voltage-gated calcium channel / voltage-gated calcium channel complex / Mechanical load activates signaling by PIEZO1 and integrins in osteocytes / ion channel inhibitor activity / Phase 0 - rapid depolarisation / neuronal dense core vesicle / regulation of heart rate by cardiac conduction / response to amyloid-beta / calcium ion import across plasma membrane / regulation of calcium ion transport / voltage-gated calcium channel activity / presynaptic active zone membrane / calcium channel regulator activity / T-tubule / sarcoplasmic reticulum / GABA-ergic synapse / modulation of chemical synaptic transmission / calcium ion transmembrane transport / cellular response to amyloid-beta / calcium ion transport / amyloid-beta binding / toxin activity / chemical synaptic transmission / neuronal cell body / synapse / calcium ion binding / extracellular exosome / extracellular region / ATP binding / metal ion binding / plasma membrane 類似検索 - 分子機能
Voltage-dependent calcium channel, N-type, alpha-1 subunit / Conotoxin, omega-type, conserved site / Omega-conotoxin family signature. / Voltage-dependent calcium channel, L-type, beta-1 subunit / Conotoxin / Conotoxin / Voltage-dependent calcium channel, L-type, beta subunit / Voltage-dependent L-type calcium channel subunit beta-1-4, N-terminal A domain / Voltage gated calcium channel subunit beta domain 4Aa N terminal / VWA N-terminal ...Voltage-dependent calcium channel, N-type, alpha-1 subunit / Conotoxin, omega-type, conserved site / Omega-conotoxin family signature. / Voltage-dependent calcium channel, L-type, beta-1 subunit / Conotoxin / Conotoxin / Voltage-dependent calcium channel, L-type, beta subunit / Voltage-dependent L-type calcium channel subunit beta-1-4, N-terminal A domain / Voltage gated calcium channel subunit beta domain 4Aa N terminal / VWA N-terminal / Voltage-dependent calcium channel, alpha-2/delta subunit, conserved region / VWA N-terminal / Neuronal voltage-dependent calcium channel alpha 2acd / : / Voltage-dependent calcium channel, alpha-1 subunit, IQ domain / Voltage gated calcium channel IQ domain / Voltage gated calcium channel IQ domain / Voltage-dependent calcium channel, alpha-1 subunit / Voltage-dependent L-type calcium channel, IQ-associated domain / Voltage-dependent L-type calcium channel, IQ-associated / : / Guanylate kinase/L-type calcium channel beta subunit / Guanylate kinase / Guanylate kinase homologues. / von Willebrand factor type A domain / von Willebrand factor (vWF) type A domain / VWFA domain profile. / Voltage-dependent channel domain superfamily / von Willebrand factor, type A / von Willebrand factor A-like domain superfamily / SH3-like domain superfamily / Src homology 3 (SH3) domain profile. / SH3 domain / EF-hand calcium-binding domain profile. / EF-hand domain / Ion transport domain / Ion transport protein / P-loop containing nucleoside triphosphate hydrolase 類似検索 - ドメイン・相同性
ジャーナル: Cell Rep / 年: 2021 タイトル: Closed-state inactivation and pore-blocker modulation mechanisms of human Ca2.2. 著者: Yanli Dong / Yiwei Gao / Shuai Xu / Yuhang Wang / Zhuoya Yu / Yue Li / Bin Li / Tian Yuan / Bei Yang / Xuejun Cai Zhang / Daohua Jiang / Zhuo Huang / Yan Zhao / 要旨: N-type voltage-gated calcium (Ca) channels mediate Ca influx at presynaptic terminals in response to action potentials and play vital roles in synaptogenesis, release of neurotransmitters, and ...N-type voltage-gated calcium (Ca) channels mediate Ca influx at presynaptic terminals in response to action potentials and play vital roles in synaptogenesis, release of neurotransmitters, and nociceptive transmission. Here, we elucidate a cryo-electron microscopy (cryo-EM) structure of the human Ca2.2 complex in apo, ziconotide-bound, and two Ca2.2-specific pore blockers-bound states. The second voltage-sensing domain (VSD) is captured in a resting-state conformation, trapped by a phosphatidylinositol 4,5-bisphosphate (PIP) molecule, which is distinct from the other three VSDs of Ca2.2, as well as activated VSDs observed in previous structures of Ca channels. This structure reveals the molecular basis for the unique inactivation process of Ca2.2 channels, in which the intracellular gate formed by S6 helices is closed and a W-helix from the domain II-III linker stabilizes closed-state inactivation. The structures of this inactivated, drug-bound complex lay a solid foundation for developing new state-dependent blockers for treatment of chronic pain.