5YW8 image
Deposition Date 2017-11-29
Release Date 2018-05-02
Last Version Date 2024-10-23
Entry Detail
PDB ID:
5YW8
Title:
Structure of pancreatic ATP-sensitive potassium channel bound with ATPgammaS (all particles at 4.4A)
Biological Source:
Source Organism:
Host Organism:
Method Details:
Experimental Method:
Resolution:
4.40 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:ATP-sensitive inward rectifier potassium channel 11
Gene (Uniprot):Kcnj11
Chain IDs:A, C, E, G
Chain Length:390
Number of Molecules:4
Biological Source:Mus musculus
Polymer Type:polypeptide(L)
Molecule:ATP-binding cassette sub-family C member 8 isoform X2
Gene (Uniprot):Abcc8
Chain IDs:B, D, F, H
Chain Length:1582
Number of Molecules:4
Biological Source:Mesocricetus auratus
Ligand Molecules
Primary Citation
Ligand binding and conformational changes of SUR1 subunit in pancreatic ATP-sensitive potassium channels.
Protein Cell 9 553 567 (2018)
PMID: 29594720 DOI: 10.1007/s13238-018-0530-y

Abstact

ATP-sensitive potassium channels (KATP) are energy sensors on the plasma membrane. By sensing the intracellular ADP/ATP ratio of β-cells, pancreatic KATP channels control insulin release and regulate metabolism at the whole body level. They are implicated in many metabolic disorders and diseases and are therefore important drug targets. Here, we present three structures of pancreatic KATP channels solved by cryo-electron microscopy (cryo-EM), at resolutions ranging from 4.1 to 4.5 Å. These structures depict the binding site of the antidiabetic drug glibenclamide, indicate how Kir6.2 (inward-rectifying potassium channel 6.2) N-terminus participates in the coupling between the peripheral SUR1 (sulfonylurea receptor 1) subunit and the central Kir6.2 channel, reveal the binding mode of activating nucleotides, and suggest the mechanism of how Mg-ADP binding on nucleotide binding domains (NBDs) drives a conformational change of the SUR1 subunit.

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Primary Citation of related structures