7W4O

The structure of KATP H175K mutant in pre-open state


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.96 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

Structural insights into the mechanism of pancreatic K ATP channel regulation by nucleotides.

Wang, M.Wu, J.X.Ding, D.Chen, L.

(2022) Nat Commun 13: 2770-2770

  • DOI: 10.1038/s41467-022-30430-4
  • Primary Citation of Related Structures:  
    7W4O, 7W4P

  • PubMed Abstract: 
  • ATP-sensitive potassium channels (K ATP ) are metabolic sensors that convert the intracellular ATP/ADP ratio to the excitability of cells. They are involved in many physiological processes and implicated in several human diseases. Here we present the cryo-EM structures of the pancreatic K ATP channel in both the closed state and the pre-open state, resolved in the same sample ...

    ATP-sensitive potassium channels (K ATP ) are metabolic sensors that convert the intracellular ATP/ADP ratio to the excitability of cells. They are involved in many physiological processes and implicated in several human diseases. Here we present the cryo-EM structures of the pancreatic K ATP channel in both the closed state and the pre-open state, resolved in the same sample. We observe the binding of nucleotides at the inhibitory sites of the Kir6.2 channel in the closed but not in the pre-open state. Structural comparisons reveal the mechanism for ATP inhibition and Mg-ADP activation, two fundamental properties of K ATP channels. Moreover, the structures also uncover the activation mechanism of diazoxide-type K ATP openers.


    Organizational Affiliation

    National Biomedical Imaging Center, Peking University, 100871, Beijing, China. chenlei2016@pku.edu.cn.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ATP-sensitive inward rectifier potassium channel 11A, C, E, G390Mus musculusMutation(s): 1 
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
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ61743
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
ATP-binding cassette sub-family C member 8 isoform X2B, D, F, H1,582Mesocricetus auratusMutation(s): 0 
Gene Names: Abcc8
Membrane Entity: Yes 
UniProt
Find proteins for A0A1U7R319 (Mesocricetus auratus)
Explore A0A1U7R319 
Go to UniProtKB:  A0A1U7R319
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A1U7R319
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ATP
Query on ATP

Download Ideal Coordinates CCD File 
BA [auth H],
M [auth B],
R [auth D],
W [auth F]
ADENOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O13 P3
ZKHQWZAMYRWXGA-KQYNXXCUSA-N
 Ligand Interaction
ADP
Query on ADP

Download Ideal Coordinates CCD File 
I [auth B],
N [auth D],
S [auth F],
X [auth H]
ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
 Ligand Interaction
E2H (Subject of Investigation/LOI)
Query on E2H

Download Ideal Coordinates CCD File 
AA [auth H],
L [auth B],
Q [auth D],
V [auth F]
6-chloranyl-~{N}-(1-methylcyclopropyl)-1,1-bis(oxidanylidene)-4~{H}-thieno[3,2-e][1,2,4]thiadiazin-3-amine
C9 H10 Cl N3 O2 S2
KYSFUHHFTIGRJN-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

Download Ideal Coordinates CCD File 
J [auth B],
K [auth B],
O [auth D],
P [auth D],
T [auth F],
J [auth B],
K [auth B],
O [auth D],
P [auth D],
T [auth F],
U [auth F],
Y [auth H],
Z [auth H]
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.96 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Natural Science Foundation of China (NSFC)China91957201

Revision History  (Full details and data files)

  • Version 1.0: 2022-06-01
    Type: Initial release