5WUA

Structure of a Pancreatic ATP-sensitive Potassium Channel


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 5.6 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structure of a Pancreatic ATP-Sensitive Potassium Channel

Li, N.Wu, J.X.Ding, D.Cheng, J.Gao, N.Chen, L.

(2017) Cell 168: 101-110.e10

  • DOI: 10.1016/j.cell.2016.12.028

  • PubMed Abstract: 
  • ATP-sensitive potassium channels (K <sub>ATP </sub>) couple intracellular ATP levels with membrane excitability. These channels play crucial roles in many essential physiological processes and have been implicated extensively in a spectrum of metabol ...

    ATP-sensitive potassium channels (K ATP ) couple intracellular ATP levels with membrane excitability. These channels play crucial roles in many essential physiological processes and have been implicated extensively in a spectrum of metabolic diseases and disorders. To gain insight into the mechanism of K ATP , we elucidated the structure of a hetero-octameric pancreatic K ATP channel in complex with a non-competitive inhibitor glibenclamide by single-particle cryoelectron microscopy to 5.6-Å resolution. The structure shows that four SUR1 regulatory subunits locate peripherally and dock onto the central Kir6.2 channel tetramer through the SUR1 TMD0-L0 fragment. Glibenclamide-bound SUR1 uses TMD0-L0 fragment to stabilize Kir6.2 channel in a closed conformation. In another structural population, a putative co-purified phosphatidylinositol 4,5-bisphosphate (PIP 2 ) molecule uncouples Kir6.2 from glibenclamide-bound SUR1. These structural observations suggest a molecular mechanism for K ATP regulation by anti-diabetic sulfonylurea drugs, intracellular adenosine nucleotide concentrations, and PIP 2 lipid.


    Organizational Affiliation

    State Key Laboratory of Membrane Biology, Institute of Molecular Medicine, Peking-Tsinghua Center for Life Sciences, Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Peking University, Beijing 100871, China.,Ministry of Education Key Laboratory of Protein Sciences, Beijing Advanced Innovation Center for Structural Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China. Electronic address: ninggao@mail.tsinghua.edu.cn.,State Key Laboratory of Membrane Biology, Institute of Molecular Medicine, Peking-Tsinghua Center for Life Sciences, Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Peking University, Beijing 100871, China; School of Life Sciences, Peking University, Beijing 100871, China.,Ministry of Education Key Laboratory of Protein Sciences, Beijing Advanced Innovation Center for Structural Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China.,State Key Laboratory of Membrane Biology, Institute of Molecular Medicine, Peking-Tsinghua Center for Life Sciences, Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Peking University, Beijing 100871, China. Electronic address: chenlei2016@pku.edu.cn.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ATP-sensitive inward rectifier potassium channel 11,superfolder GFP
A, B, C, D
681Mus musculusMutation(s): 0 
Gene Names: Kcnj11
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Channels: Potassium, Sodium, & Proton Ion-Selective
Protein: 
SUR1/Kir6.2 pancreatic ATP-sensitive K+ channel
Find proteins for Q61743 (Mus musculus)
Go to UniProtKB:  Q61743
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
SUR1
E, F, G, H
1582N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 5.6 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Ministry of Science and Technology of ChinaChina2016YFA0502004,2016YFA0500700,2013CB910404
National Natural Science Foundation of ChinaChina31622021, 31521062,31422016, 31470722, 31630087

Revision History 

  • Version 1.0: 2017-01-25
    Type: Initial release