3F5W

KcsA Potassium channel in the open-inactivated state with 32 A opening at T112

• PDB DOI: https://doi.org/10.2210/pdb3F5W/pdb

• Classification: membrane protein/metal transport
• Organism(s): Mus musculus, Streptomyces lividans
• Expression System: Escherichia coli
• Mutation(s): Yes 
• Membrane Protein: Yes  OPMPDBTMMemProtMDmpstruc


• Deposited: 2008-11-04 Released: 2010-05-19 
• Deposition Author(s): Cuello, L.G., Jogini, V., Cortes, D.M., Perozo, E.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.30 Å
• R-Value Free: 0.265 
• R-Value Work: 0.259 

Literature

KcsA Potassium channel in the open-inactivated state with 32 A opening at T112

Cuello, L.G., Jogini, V., Cortes, D.M., Perozo, E.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C4  (Explore in 3D)
Global Stoichiometry: Hetero 12-mer - A4B4C4 

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

Macromolecule Content

• Total Structure Weight: 57.85 kDa 
• Atom Count: 3,924 
• Modelled Residue Count: 519 
• Deposited Residue Count: 535 
• Unique protein chains: 3

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Antibody heavy chain	A	219	Mus musculus	Mutation(s): 0

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Antibody light chain	B	212	Mus musculus	Mutation(s): 0

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Voltage-gated potassium channel	C	104	Streptomyces lividans	Mutation(s): 7  Membrane Entity: Yes
UniProt
Find proteins for P0A334 (Streptomyces lividans) Explore P0A334  Go to UniProtKB:  P0A334

Small Molecules

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

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.30 Å
• R-Value Free: 0.265 
• R-Value Work: 0.259 
• Space Group: I 4

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 155.86	α = 90
b = 155.86	β = 90
c = 73.115	γ = 90

Software Package:

Software Name	Purpose
ADSC	data collection
CNS	refinement
HKL-2000	data reduction
HKL-2000	data scaling
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2010-05-19 
Deposition Author(s): Cuello, L.G., Jogini, V., Cortes, D.M., Perozo, E.

Revision History  

• Version 1.0: 2010-05-19
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2018-08-29
  Changes: Advisory, Data collection, Source and taxonomy, Structure summary
• Version 1.3: 2021-10-20
  Changes: Database references, Derived calculations
• Version 1.4: 2023-12-27
  Changes: Data collection
• Version 1.5: 2024-11-13
  Changes: Structure summary