2BKP

STRUCTURE ANALYSIS OF UNKNOWN FUNCTION PROTEIN

• PDB DOI: https://doi.org/10.2210/pdb2BKP/pdb

• Classification: HYPOTHETICAL PROTEIN
• Organism(s): Pyrococcus horikoshii OT3
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2005-02-18 Released: 2006-06-28 
• Deposition Author(s): Inagaki, E., Tahirov, T.H.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.290 
• R-Value Work: 0.225 
• R-Value Observed: 0.225 

Starting Model: experimental

Literature

Crystal Analysis of Putative Potassium Channel Related Protein from Pyrococcus Horikoshii

Inagaki, E., Tahirov, T.H.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

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

Macromolecule Content

• Total Structure Weight: 23.09 kDa 
• Atom Count: 1,677 
• Modelled Residue Count: 194 
• Deposited Residue Count: 205 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
HYPOTHETICAL PROTEIN PH0236	A	205	Pyrococcus horikoshii OT3	Mutation(s): 0
UniProt
Find proteins for O57975 (Pyrococcus horikoshii (strain ATCC 700860 / DSM 12428 / JCM 9974 / NBRC 100139 / OT-3)) Explore O57975  Go to UniProtKB:  O57975

Small Molecules

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

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.290 
• R-Value Work: 0.225 
• R-Value Observed: 0.225 
• Space Group: P 4₂ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 71.052	α = 90
b = 71.052	β = 90
c = 98.18	γ = 90

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Released Date: 2006-06-28 
Deposition Author(s): Inagaki, E., Tahirov, T.H.

Revision History  

• Version 1.0: 2006-06-28
  Type: Initial release
  
• Version 1.1: 2011-05-08
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2023-12-13
  Changes: Data collection, Database references, Derived calculations, Other, Refinement description