1MMM

DISTINCT METAL ENVIRONMENT IN IRON-SUBSTITUTED MANGANESE SUPEROXIDE DISMUTASE PROVIDES A STRUCTURAL BASIS OF METAL SPECIFICITY

• PDB DOI: https://doi.org/10.2210/pdb1MMM/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Escherichia coli
• Mutation(s): No 


• Deposited: 1998-08-26 Released: 1998-09-02 
• Deposition Author(s): Edwards, R.A., Whittaker, M.M., Whittaker, J.W., Jameson, G.B., Baker, E.N.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.231 
• R-Value Work: 0.192 
• R-Value Observed: 0.192 

Literature

Distinct Metal Environment in Fe-Substituted Manganese Superoxide Dismutase Provides a Structural Basis of Metal Specificity

Edwards, R.A., Whittaker, M.M., Whittaker, J.W., Jameson, G.B., Baker, E.N.

(1998) J Am Chem Soc 120: 9684-9685

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: 46.16 kDa 
• Atom Count: 3,545 
• Modelled Residue Count: 410 
• Deposited Residue Count: 410 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PROTEIN (IRON-SUBSTITUTED MANGANESE SUPEROXIDE DISMUTASE)	A, B	205	Escherichia coli	Mutation(s): 0  EC: 1.15.1.1
UniProt
Find proteins for P00448 (Escherichia coli (strain K12)) Explore P00448  Go to UniProtKB:  P00448

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
FE	D [auth A], G [auth B]	FE (III) ION Fe VTLYFUHAOXGGBS-UHFFFAOYSA-N
OH	C [auth A], E [auth B], F [auth B]	HYDROXIDE ION H O XLYOFNOQVPJJNP-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.231 
• R-Value Work: 0.192 
• R-Value Observed: 0.192 
• Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 46.19	α = 90
b = 89.04	β = 90
c = 206.671	γ = 90

Software Package:

Software Name	Purpose
AMoRE	phasing
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 1998-09-02 
Deposition Author(s): Edwards, R.A., Whittaker, M.M., Whittaker, J.W., Jameson, G.B., Baker, E.N.

Revision History  

• Version 1.0: 1998-09-02
  Type: Initial release
  
• Version 1.1: 2007-10-16
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2024-02-14
  Changes: Data collection, Database references, Derived calculations, Refinement description