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Yorodumi- PDB-7s5x: Human KATP channel in open conformation, focused on Kir and one S... -
+Open data
-Basic information
Entry | Database: PDB / ID: 7s5x | ||||||
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Title | Human KATP channel in open conformation, focused on Kir and one SUR, position 1 | ||||||
Components |
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Keywords | MEMBRANE PROTEIN / ion channel / KATP / ATP-sensitive potassium channel | ||||||
Function / homology | Function and homology information negative regulation of neuroblast migration / positive regulation of uterine smooth muscle relaxation / ATP sensitive Potassium channels / Defective ABCC8 can cause hypo- and hyper-glycemias / positive regulation of tight junction disassembly / potassium ion-transporting ATPase complex / negative regulation of blood-brain barrier permeability / response to resveratrol / ventricular cardiac muscle tissue development / ATP-activated inward rectifier potassium channel activity ...negative regulation of neuroblast migration / positive regulation of uterine smooth muscle relaxation / ATP sensitive Potassium channels / Defective ABCC8 can cause hypo- and hyper-glycemias / positive regulation of tight junction disassembly / potassium ion-transporting ATPase complex / negative regulation of blood-brain barrier permeability / response to resveratrol / ventricular cardiac muscle tissue development / ATP-activated inward rectifier potassium channel activity / glutamate secretion, neurotransmission / cell body fiber / inward rectifying potassium channel / negative regulation of low-density lipoprotein particle clearance / sulfonylurea receptor activity / CAMKK-AMPK signaling cascade / positive regulation of potassium ion transport / ATPase-coupled monoatomic cation transmembrane transporter activity / response to pH / inorganic cation transmembrane transport / neuromuscular process / action potential / negative regulation of glial cell proliferation / ankyrin binding / cellular response to organic substance / response to ATP / response to zinc ion / response to testosterone / potassium ion import across plasma membrane / intracellular glucose homeostasis / positive regulation of insulin secretion involved in cellular response to glucose stimulus / potassium channel activity / ATPase-coupled transmembrane transporter activity / axolemma / intercalated disc / negative regulation of insulin secretion / ABC-type transporter activity / potassium ion transmembrane transport / T-tubule / heat shock protein binding / negative regulation of angiogenesis / acrosomal vesicle / Regulation of insulin secretion / female pregnancy / response to ischemia / determination of adult lifespan / ADP binding / cellular response to glucose stimulus / positive regulation of protein localization to plasma membrane / sarcolemma / response to insulin / visual learning / potassium ion transport / transmembrane transport / memory / synaptic vesicle membrane / cellular response to nicotine / positive regulation of tumor necrosis factor production / response to estradiol / presynaptic membrane / nuclear envelope / cellular response to tumor necrosis factor / transmembrane transporter binding / response to lipopolysaccharide / response to hypoxia / endosome / response to xenobiotic stimulus / neuronal cell body / glutamatergic synapse / apoptotic process / ATP hydrolysis activity / ATP binding / membrane / plasma membrane Similarity search - Function | ||||||
Biological species | Homo sapiens (human) | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.7 Å | ||||||
Authors | Zhao, C. / MacKinnon, R. | ||||||
Funding support | United States, 1items
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Citation | Journal: Proc Natl Acad Sci U S A / Year: 2021 Title: Molecular structure of an open human K channel. Authors: Chen Zhao / Roderick MacKinnon / Abstract: K channels are metabolic sensors that translate intracellular ATP/ADP balance into membrane excitability. The molecular composition of K includes an inward-rectifier potassium channel (Kir) and an ...K channels are metabolic sensors that translate intracellular ATP/ADP balance into membrane excitability. The molecular composition of K includes an inward-rectifier potassium channel (Kir) and an ABC transporter-like sulfonylurea receptor (SUR). Although structures of K have been determined in many conformations, in all cases, the pore in Kir is closed. Here, we describe human pancreatic K (hK) structures with an open pore at 3.1- to 4.0-Å resolution using single-particle cryo-electron microscopy (cryo-EM). Pore opening is associated with coordinated structural changes within the ATP-binding site and the channel gate in Kir. Conformational changes in SUR are also observed, resulting in an area reduction of contact surfaces between SUR and Kir. We also observe that pancreatic hK exhibits the unique (among inward-rectifier channels) property of PIP-independent opening, which appears to be correlated with a docked cytoplasmic domain in the absence of PIP. | ||||||
History |
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-Structure visualization
Movie |
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Structure viewer | Molecule: MolmilJmol/JSmol |
-Downloads & links
-Download
PDBx/mmCIF format | 7s5x.cif.gz | 472.2 KB | Display | PDBx/mmCIF format |
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PDB format | pdb7s5x.ent.gz | 391.7 KB | Display | PDB format |
PDBx/mmJSON format | 7s5x.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/s5/7s5x ftp://data.pdbj.org/pub/pdb/validation_reports/s5/7s5x | HTTPS FTP |
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-Related structure data
Related structure data | 24842MC 7s5tC 7s5vC 7s5yC 7s5zC 7s60C 7s61C C: citing same article (ref.) M: map data used to model this data |
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Similar structure data |
-Links
-Assembly
Deposited unit |
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-Components
#1: Protein | Mass: 43622.746 Da / Num. of mol.: 4 / Mutation: C166S, G334D Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human) / References: UniProt: B2RC52 #2: Protein | | Mass: 177237.266 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: ABCC8, HRINS, SUR, SUR1 / Production host: Homo sapiens (human) / References: UniProt: Q09428 #3: Chemical | ChemComp-ADP / | #4: Chemical | #5: Chemical | ChemComp-ATP / | Has ligand of interest | Y | |
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-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
-Sample preparation
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Buffer solution | pH: 8.5 | ||||||||||||||||||||||||
Specimen | Conc.: 6.83 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | ||||||||||||||||||||||||
Specimen support | Grid type: Quantifoil R1.2/1.3 | ||||||||||||||||||||||||
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 289 K |
-Electron microscopy imaging
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
Electron lens | Mode: BRIGHT FIELDBright-field microscopy / C2 aperture diameter: 100 µm |
Image recording | Electron dose: 57 e/Å2 / Detector mode: SUPER-RESOLUTION / Film or detector model: GATAN K2 SUMMIT (4k x 4k) |
-Processing
Software | Name: PHENIX / Version: 1.17.1_3660: / Classification: refinement | ||||||||||||||||||||||||
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
3D reconstruction | Resolution: 3.7 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 23783 / Symmetry type: POINT | ||||||||||||||||||||||||
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