6M86

Crystal Structure of Inward Rectifier Kir2.2 Force Open Mutant

• PDB DOI: https://doi.org/10.2210/pdb6M86/pdb

• Classification: METAL TRANSPORT
• Organism(s): Gallus gallus
• Expression System: Komagataella pastoris
• Mutation(s): Yes 
• Membrane Protein: Yes  PDBTMMemProtMDmpstruc


• Deposited: 2018-08-21 Released: 2019-09-04 
• Deposition Author(s): Lee, S.-J., Ren, F., Yuan, P., Nichols, C.G.
• Funding Organization(s): National Institutes of Health/National Human Genome Research Institute (NIH/NHGRI), American Heart Association

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.60 Å
• R-Value Free: 0.287 
• R-Value Work: 0.234 
• R-Value Observed: 0.236 

Starting Model: experimental

Literature

Potassium conduction through an eukarytoic inwardly rectifying potassium channel

Lee, S.-J., Nichols, C.G.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C4  (Explore in 3D)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly Evidence: gel filtration

Macromolecule Content

• Total Structure Weight: 39.67 kDa 
• Atom Count: 2,583 
• Modelled Residue Count: 322 
• Deposited Residue Count: 343 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ATP-sensitive inward rectifier potassium channel 12	A	343	Gallus gallus	Mutation(s): 2  Gene Names: KCNJ12 Membrane Entity: Yes
UniProt
Find proteins for F1NHE9 (Gallus gallus) Explore F1NHE9  Go to UniProtKB:  F1NHE9

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
K	B [auth A], C [auth A], D [auth A], E [auth A], F [auth A]	POTASSIUM ION K NPYPAHLBTDXSSS-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.60 Å
• R-Value Free: 0.287 
• R-Value Work: 0.234 
• R-Value Observed: 0.236 
• Space Group: I 4

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 82.852	α = 90
b = 82.852	β = 90
c = 189.109	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
SCALEPACK	data scaling
MOLREP	phasing
Coot	model building
PDB_EXTRACT	data extraction

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2019-09-04 
Deposition Author(s): Lee, S.-J., Ren, F., Yuan, P., Nichols, C.G.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Human Genome Research Institute (NIH/NHGRI)	United States	HL54171
American Heart Association	United States	15POST22390016

Revision History  

• Version 1.0: 2019-09-04
  Type: Initial release
  
• Version 1.1: 2019-12-18
  Changes: Author supporting evidence
• Version 1.2: 2023-10-11
  Changes: Data collection, Database references, Derived calculations, Refinement description
• Version 1.3: 2024-10-30
  Changes: Structure summary