- PDB-6u9v: Cryo electron microscopy structure of the ATP-gated rat P2X7 ion ... -
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基本情報
登録情報
データベース: PDB / ID: 6u9v
タイトル
Cryo electron microscopy structure of the ATP-gated rat P2X7 ion channel in the apo, closed state
要素
P2X purinoceptor 7
キーワード
MEMBRANE PROTEIN / Ion Channel Apoptosis
機能・相同性
機能・相同性情報
The NLRP3 inflammasome / regulation of presynaptic dense core granule exocytosis / Platelet homeostasis / positive regulation of lymphocyte apoptotic process / positive regulation of bleb assembly / NAD transport / phagolysosome assembly / Elevation of cytosolic Ca2+ levels / phospholipid transfer to membrane / positive regulation of cytoskeleton organization ...The NLRP3 inflammasome / regulation of presynaptic dense core granule exocytosis / Platelet homeostasis / positive regulation of lymphocyte apoptotic process / positive regulation of bleb assembly / NAD transport / phagolysosome assembly / Elevation of cytosolic Ca2+ levels / phospholipid transfer to membrane / positive regulation of cytoskeleton organization / positive regulation of monoatomic ion transmembrane transport / lymphocyte apoptotic process / purinergic nucleotide receptor signaling pathway / gamma-aminobutyric acid secretion / pore complex assembly / extracellularly ATP-gated monoatomic cation channel activity / purinergic nucleotide receptor activity / positive regulation of interleukin-1 alpha production / plasma membrane organization / positive regulation of gamma-aminobutyric acid secretion / bleb / plasma membrane phospholipid scrambling / collagen metabolic process / negative regulation of cell volume / ATP export / positive regulation of prostaglandin secretion / T cell apoptotic process / bleb assembly / response to fluid shear stress / vesicle budding from membrane / mitochondrial depolarization / ceramide biosynthetic process / positive regulation of T cell apoptotic process / programmed cell death / prostaglandin secretion / positive regulation of ossification / cellular response to dsRNA / cell volume homeostasis / glutamate secretion / positive regulation of glutamate secretion / negative regulation of bone resorption / positive regulation of macrophage cytokine production / skeletal system morphogenesis / phospholipid translocation / response to zinc ion / response to ATP / positive regulation of mitochondrial depolarization / sodium channel activity / positive regulation of NLRP3 inflammasome complex assembly / protein homotrimerization / T cell homeostasis / positive regulation of calcium ion transport into cytosol / membrane protein ectodomain proteolysis / synaptic vesicle exocytosis / protein secretion / monoatomic cation transport / membrane depolarization / response to electrical stimulus / potassium channel activity / response to mechanical stimulus / positive regulation of bone mineralization / T cell proliferation / neuronal action potential / regulation of sodium ion transport / negative regulation of MAPK cascade / extrinsic apoptotic signaling pathway / release of sequestered calcium ion into cytosol / sensory perception of pain / homeostasis of number of cells within a tissue / reactive oxygen species metabolic process / positive regulation of glycolytic process / protein serine/threonine kinase activator activity / positive regulation of interleukin-1 beta production / positive regulation of protein secretion / mitochondrion organization / response to bacterium / neuromuscular junction / lipopolysaccharide binding / apoptotic signaling pathway / establishment of localization in cell / protein catabolic process / response to calcium ion / T cell mediated cytotoxicity / calcium ion transmembrane transport / protein processing / positive regulation of T cell mediated cytotoxicity / positive regulation of interleukin-6 production / terminal bouton / cell morphogenesis / calcium ion transport / cell-cell junction / nuclear envelope / MAPK cascade / signaling receptor activity / channel activity / scaffold protein binding / response to lipopolysaccharide / gene expression / cell surface receptor signaling pathway / postsynapse 類似検索 - 分子機能
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)
K99HL138129
米国
引用
ジャーナル: Cell / 年: 2019 タイトル: Full-Length P2X Structures Reveal How Palmitoylation Prevents Channel Desensitization. 著者: Alanna E McCarthy / Craig Yoshioka / Steven E Mansoor / 要旨: P2X receptors are trimeric, non-selective cation channels activated by extracellular ATP. The P2X receptor subtype is a pharmacological target because of involvement in apoptotic, inflammatory, and ...P2X receptors are trimeric, non-selective cation channels activated by extracellular ATP. The P2X receptor subtype is a pharmacological target because of involvement in apoptotic, inflammatory, and tumor progression pathways. It is the most structurally and functionally distinct P2X subtype, containing a unique cytoplasmic domain critical for the receptor to initiate apoptosis and not undergo desensitization. However, lack of structural information about the cytoplasmic domain has hindered understanding of the molecular mechanisms underlying these processes. We report cryoelectron microscopy structures of full-length rat P2X receptor in apo and ATP-bound states. These structures reveal how one cytoplasmic element, the C-cys anchor, prevents desensitization by anchoring the pore-lining helix to the membrane with palmitoyl groups. They show a second cytoplasmic element with a unique fold, the cytoplasmic ballast, which unexpectedly contains a zinc ion complex and a guanosine nucleotide binding site. Our structures provide first insights into the architecture and function of a P2X receptor cytoplasmic domain.