Voltage-gated calcium channel / CaV2.3 / 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 / calcium ion transmembrane transport via high voltage-gated calcium channel / Phase 2 - plateau phase / high voltage-gated calcium channel activity / membrane depolarization during bundle of His cell action potential / L-type voltage-gated calcium channel complex / positive regulation of muscle contraction / regulation of ventricular cardiac muscle cell membrane repolarization / NCAM1 interactions ...regulation of membrane repolarization during action potential / Presynaptic depolarization and calcium channel opening / calcium ion transmembrane transport via high voltage-gated calcium channel / Phase 2 - plateau phase / high voltage-gated calcium channel activity / membrane depolarization during bundle of His cell action potential / L-type voltage-gated calcium channel complex / positive regulation of muscle contraction / regulation of ventricular cardiac muscle cell membrane repolarization / NCAM1 interactions / cardiac muscle cell action potential involved in contraction / calcium ion transport into cytosol / voltage-gated monoatomic cation channel activity / 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 / Phase 0 - rapid depolarisation / regulation of heart rate by cardiac conduction / regulation of calcium ion transport / calcium ion import across plasma membrane / neuronal dense core vesicle / voltage-gated calcium channel activity / presynaptic active zone membrane / T-tubule / sarcoplasmic reticulum / calcium channel regulator activity / Regulation of insulin secretion / calcium ion transmembrane transport / GABA-ergic synapse / cellular response to amyloid-beta / calcium ion transport / chemical synaptic transmission / neuronal cell body / synapse / calcium ion binding / extracellular exosome / metal ion binding / plasma membrane 類似検索 - 分子機能
Voltage-dependent calcium channel, R-type, alpha-1 subunit / Voltage-dependent calcium channel, L-type, beta-1 subunit / 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, R-type, alpha-1 subunit / Voltage-dependent calcium channel, L-type, beta-1 subunit / 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 / VWFA domain profile. / von Willebrand factor (vWF) type A domain / 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: Biochem Biophys Res Commun / 年: 2024 タイトル: Structural insights into the allosteric effects of the antiepileptic drug topiramate on the Ca2.3 channel. 著者: Yiwei Gao / Qinru Bai / Xuejun Cai Zhang / Yan Zhao / 要旨: The R-type voltage-gated calcium channel Ca2.3 is predominantly located in the presynapse and is implicated in distinct types of epileptic seizures. It has consequently emerged as a molecular target ...The R-type voltage-gated calcium channel Ca2.3 is predominantly located in the presynapse and is implicated in distinct types of epileptic seizures. It has consequently emerged as a molecular target in seizure treatment. Here, we determined the cryo-EM structure of the Ca2.3-α2δ1-β1 complex in the topiramate-bound state at a 3.0 Å resolution. We provide a snapshot of the binding site of topiramate, a widely prescribed antiepileptic drug, on a voltage-gated ion channel. The binding site is located at an intracellular juxtamembrane hydrophilic cavity. Further structural analysis revealed that topiramate may allosterically facilitate channel inactivation. These findings provide fundamental insights into the mechanism underlying the inhibitory effect of topiramate on Ca and Na channels, elucidating a previously unseen modulator binding site and thus pointing toward a route for the development of new drugs.