2EK3

Structural study of Project ID PH0725 from Pyrococcus horikoshii OT3 (L3M)

• PDB DOI: https://doi.org/10.2210/pdb2EK3/pdb

• Classification: TRANSFERASE
• Organism(s): Pyrococcus horikoshii OT3
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2007-03-22 Released: 2007-09-25 
• Deposition Author(s): Asada, Y., Shimada, H., Taketa, M., Matsuura, Y., Kunishima, N., RIKEN Structural Genomics/Proteomics Initiative (RSGI)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free: 0.247 
• R-Value Work: 0.190 
• R-Value Observed: 0.193 

Literature

Structural study of Project ID PH0725 from Pyrococcus horikoshii OT3 (L3M)

Asada, Y., Shimada, H., Taketa, M., Matsuura, Y., Kunishima, N.

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.

Macromolecule Content

• Total Structure Weight: 59.67 kDa 
• Atom Count: 4,420 
• Modelled Residue Count: 528 
• Deposited Residue Count: 530 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
diphthine synthase	A, B	265	Pyrococcus horikoshii OT3	Mutation(s): 1  EC: 2.1.1.98
UniProt
Find proteins for O58456 (Pyrococcus horikoshii (strain ATCC 700860 / DSM 12428 / JCM 9974 / NBRC 100139 / OT-3)) Explore O58456  Go to UniProtKB:  O58456

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SAH	D [auth A]	S-ADENOSYL-L-HOMOCYSTEINE C14 H20 N6 O5 S ZJUKTBDSGOFHSH-WFMPWKQPSA-N
NA	C [auth A]	SODIUM ION Na FKNQFGJONOIPTF-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free: 0.247 
• R-Value Work: 0.190 
• R-Value Observed: 0.193 
• Space Group: P 4₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 104.714	α = 90
b = 104.714	β = 90
c = 138.892	γ = 90

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Released Date: 2007-09-25 
Deposition Author(s): Asada, Y., Shimada, H., Taketa, M., Matsuura, Y., Kunishima, N., RIKEN Structural Genomics/Proteomics Initiative (RSGI)

Revision History  

• Version 1.0: 2007-09-25
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Source and taxonomy, Version format compliance
• Version 1.2: 2021-11-10
  Changes: Database references, Derived calculations
• Version 1.3: 2024-05-29
  Changes: Data collection