(Voltage-dependent L-type calcium channel subunit ...) x 2
(Voltage-dependent calcium channel ...電位依存性カルシウムチャネル) x 2
キーワード
MEMBRANE PROTEIN (膜タンパク質) / Membrane protein complex modulated by FDA approved drug. (生体膜)
機能・相同性
機能・相同性情報
positive regulation of muscle contraction / high voltage-gated calcium channel activity / L-type voltage-gated calcium channel complex / regulation of calcium ion transmembrane transport via high voltage-gated calcium channel / cellular response to caffeine / calcium ion import across plasma membrane / calcium channel regulator activity / voltage-gated calcium channel activity / release of sequestered calcium ion into cytosol / regulation of ryanodine-sensitive calcium-release channel activity ...positive regulation of muscle contraction / high voltage-gated calcium channel activity / L-type voltage-gated calcium channel complex / regulation of calcium ion transmembrane transport via high voltage-gated calcium channel / cellular response to caffeine / calcium ion import across plasma membrane / calcium channel regulator activity / voltage-gated calcium channel activity / release of sequestered calcium ion into cytosol / regulation of ryanodine-sensitive calcium-release channel activity / 横行小管 / muscle contraction / calcium ion transmembrane transport / 筋鞘 / transmembrane transporter binding / calmodulin binding / metal ion binding / 細胞膜 類似検索 - 分子機能
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R01GM130762
中国
引用
ジャーナル: Cell / 年: 2019 タイトル: Molecular Basis for Ligand Modulation of a Mammalian Voltage-Gated Ca Channel. 著者: Yanyu Zhao / Gaoxingyu Huang / Jianping Wu / Qiurong Wu / Shuai Gao / Zhen Yan / Jianlin Lei / Nieng Yan / 要旨: The L-type voltage-gated Ca (Ca) channels are modulated by various compounds exemplified by 1,4-dihydropyridines (DHP), benzothiazepines (BTZ), and phenylalkylamines (PAA), many of which have been ...The L-type voltage-gated Ca (Ca) channels are modulated by various compounds exemplified by 1,4-dihydropyridines (DHP), benzothiazepines (BTZ), and phenylalkylamines (PAA), many of which have been used for characterizing channel properties and for treatment of hypertension and other disorders. Here, we report the cryoelectron microscopy (cryo-EM) structures of Ca1.1 in complex with archetypal antagonistic drugs, nifedipine, diltiazem, and verapamil, at resolutions of 2.9 Å, 3.0 Å, and 2.7 Å, respectively, and with a DHP agonist Bay K 8644 at 2.8 Å. Diltiazem and verapamil traverse the central cavity of the pore domain, directly blocking ion permeation. Although nifedipine and Bay K 8644 occupy the same fenestration site at the interface of repeats III and IV, the coordination details support previous functional observations that Bay K 8644 is less favored in the inactivated state. These structures elucidate the modes of action of different Ca ligands and establish a framework for structure-guided drug discovery.
As for the unusual connection between Y619-S621 of Chain F, the original amino acid for S620 is ...As for the unusual connection between Y619-S621 of Chain F, the original amino acid for S620 is Y620 and the density for this large side chain is missing from reconstruction. Authors suspect this to be a result of alternative splicing. The density in this beta strand, Y619 and S621, is very clear and allows accurate side chain assignment for this area and surrounding areas.