5WUA

Structure of a Pancreatic ATP-sensitive Potassium Channel


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 5.60 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


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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
  • Primary Citation of Related Structures:  
    5WUA

  • PubMed Abstract: 
  • 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 ...

    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. Electronic address: chenlei2016@pku.edu.cn.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ATP-sensitive inward rectifier potassium channel 11,superfolder GFPA, B, C, D681Mus musculussynthetic construct
This entity is chimeric
Mutation(s): 0 
Gene Names: Kcnj11
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for Q61743 (Mus musculus)
Explore Q61743 
Go to UniProtKB:  Q61743
IMPC:  MGI:107501
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
SUR1E, F, G, H1582Mesocricetus auratusMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for A0A1S4NYG1 (Mesocricetus auratus)
Explore A0A1S4NYG1 
Go to UniProtKB:  A0A1S4NYG1
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 5.60 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report




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  (Full details and data files)

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