2HXG

Crystal Structure of Mn2+ bound ECAI

• PDB DOI: https://doi.org/10.2210/pdb2HXG/pdb

• Classification: ISOMERASE
• Organism(s): Escherichia coli
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2006-08-03 Released: 2006-08-15 
• Deposition Author(s): Manjasetty, B.A., Burley, S.K., New York SGX Research Center for Structural Genomics (NYSGXRC)

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free: 0.288 
• R-Value Work: 0.229 
• R-Value Observed: 0.232 

Starting Model: experimental

Literature

Crystal Structure of Mn2+-bound Escherichia coli L-arabinose Isomerase (ECAI) and Implications in Protein Catalytic Mechanism and Thermo-Stability.

Zhu, W., Chance, M.R., Manjasetty, B.A.

(2007) J Young Investig 17

Biological Assembly 1  

Global Symmetry: Dihedral - D3  (Explore in 3D)
Global Stoichiometry: Homo 6-mer - A6 

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

Macromolecule Content

• Total Structure Weight: 168.49 kDa 
• Atom Count: 11,565 
• Modelled Residue Count: 1,494 
• Deposited Residue Count: 1,500 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
L-arabinose isomerase	A, B, C	500	Escherichia coli	Mutation(s): 0  Gene Names: araA EC: 5.3.1.4
UniProt
Find proteins for P08202 (Escherichia coli (strain K12)) Explore P08202  Go to UniProtKB:  P08202

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
MN	D [auth A], E [auth B], F [auth C]	MANGANESE (II) ION Mn WAEMQWOKJMHJLA-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free: 0.288 
• R-Value Work: 0.229 
• R-Value Observed: 0.232 
• Space Group: P 3₂ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 116.87	α = 90
b = 116.87	β = 90
c = 215.076	γ = 120

Software Package:

Software Name	Purpose
REFMAC	refinement
MAR345	data collection
HKL-2000	data reduction
HKL-2000	data scaling
MOLREP	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2006-08-15 
Deposition Author(s): Manjasetty, B.A., Burley, S.K., New York SGX Research Center for Structural Genomics (NYSGXRC)

Revision History  

• Version 1.0: 2006-08-15
  Type: Initial release
  
• Version 1.1: 2007-09-25
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Derived calculations, Version format compliance
• Version 1.3: 2014-03-12
  Changes: Database references
• Version 1.4: 2017-10-18
  Changes: Refinement description
• Version 1.5: 2021-02-03
  Changes: Derived calculations, Structure summary
• Version 1.6: 2023-08-30
  Changes: Data collection, Database references, Refinement description