6C3P

Cryo-EM structure of human KATP bound to ATP and ADP in propeller form

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

Molecular structure of human KATP in complex with ATP and ADP.

Lee, K.P.K., Chen, J., MacKinnon, R.

(2017) Elife 6: --

  • DOI: 10.7554/eLife.32481
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    • In many excitable cells KATP channels respond to intracellular adenosine nucleotides: ATP inhibits while ADP activates. We present two structures of the human pancreatic KATP channel, containing the ABC transporter SUR1 and the inward-rectifier K+ ch ...

    In many excitable cells KATP channels respond to intracellular adenosine nucleotides: ATP inhibits while ADP activates. We present two structures of the human pancreatic KATP channel, containing the ABC transporter SUR1 and the inward-rectifier K+ channel Kir6.2, in the presence of Mg2+ and nucleotides. These structures, referred to as quatrefoil and propeller forms, were determined by single-particle cryo-EM at 3.9 Å and 5.6 Å, respectively. In both forms ATP occupies the inhibitory site in Kir6.2. The nucleotide-binding domains of SUR1 are dimerized with Mg2+-ATP in the degenerate site and Mg2+-ADP in the consensus site. A lasso extension forms an interface between SUR1 and Kir6.2 adjacent to the ATP site in the propeller form, and is disrupted in the quatrefoil form. These structures support the role of SUR1 as an ADP sensor and highlight the lasso extension as a key regulatory element in ADP's ability to override ATP inhibition.

    Organizational Affiliation: 

    Laboratory of Molecular Neurobiology and Biophysics, The Rockefeller University, New York, United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ATP-sensitive inward rectifier potassium channel 11
A, D, B, C
406Homo sapiensMutation(s): 0 
Gene Names: KCNJ11
Find proteins for Q14654 (Homo sapiens)
Go to Gene View: KCNJ11
Go to UniProtKB:  Q14654
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
ATP-binding cassette sub-family C member 8
E, H, G, F
1581Homo sapiensMutation(s): 0 
Gene Names: ABCC8 (HRINS, SUR, SUR1)
Find proteins for Q09428 (Homo sapiens)
Go to Gene View: ABCC8
Go to UniProtKB:  Q09428
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ATP
Query on ATP
Download SDF File 
Download CCD File 
A, C, D, E, F, G, H
ADENOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O13 P3
ZKHQWZAMYRWXGA-KQYNXXCUSA-N
 Ligand Interaction
ADP
Query on ADP
Download SDF File 
Download CCD File 
E, F, G, H
ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
 Ligand Interaction
MG
Query on MG
Download SDF File 
Download CCD File 
E, F, G, H
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
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


View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-01-24
    Type: Initial release