Structure of pancreatic ATP-sensitive potassium channel bound with glibenclamide and ATPgammaS (focused refinement on SUR1 ABC transporter module at 4.4A)

Experimental Data Snapshot

  • Resolution: 4.40 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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Ligand binding and conformational changes of SUR1 subunit in pancreatic ATP-sensitive potassium channels.

Wu, J.X.Ding, D.Wang, M.Kang, Y.Zeng, X.Chen, L.

(2018) Protein Cell 9: 553-567

  • DOI: https://doi.org/10.1007/s13238-018-0530-y
  • Primary Citation of Related Structures:  
    5YKE, 5YKF, 5YKG, 5YW7, 5YW8, 5YW9, 5YWA, 5YWB, 5YWC, 5YWD

  • PubMed Abstract: 

    ATP-sensitive potassium channels (K ATP ) are energy sensors on the plasma membrane. By sensing the intracellular ADP/ATP ratio of β-cells, pancreatic K ATP 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 K ATP 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.

  • Organizational Affiliation

    State Key Laboratory of Membrane Biology, Institute of Molecular Medicine, Peking University, Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Beijing, 100871, China.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ATP-binding cassette sub-family C member 8 isoform X2A [auth B]1,582Mesocricetus auratusMutation(s): 0 
Gene Names: Abcc8
Membrane Entity: Yes 
Find proteins for A0A1U7R319 (Mesocricetus auratus)
Explore A0A1U7R319 
Go to UniProtKB:  A0A1U7R319
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A1U7R319
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on AGS

Download Ideal Coordinates CCD File 
C10 H16 N5 O12 P3 S
Query on GBM

Download Ideal Coordinates CCD File 
C23 H28 Cl N3 O5 S
Binding Affinity Annotations 
IDSourceBinding Affinity
GBM BindingDB:  5YW7 IC50: 4.3 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Resolution: 4.40 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Ministry of Science and Technology of ChinaChina2016YFA0502004
National Natural Science Foundation of ChinaChina31622021
National Natural Science Foundation of ChinaChina31521062
China Postdoctoral Science FoundationChina2016M600856
China Postdoctoral Science FoundationChina2017T100014

Revision History  (Full details and data files)

  • Version 1.0: 2018-05-02
    Type: Initial release
  • Version 1.1: 2018-06-13
    Changes: Data collection, Database references
  • Version 1.2: 2024-03-27
    Changes: Data collection, Database references, Structure summary