Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Biological Assembly 2  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 188.14 kDa 
• Atom Count: 13712 
• Modelled Residue Count: 1724 
• Deposited Residue Count: 1730 
• Unique protein chains: 1

1L5J

CRYSTAL STRUCTURE OF E. COLI ACONITASE B.

• DOI: 10.2210/pdb1L5J/pdb

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


• Deposited: 2002-03-07 Released: 2002-06-12 
• Deposition Author(s): Williams, C.H., Stillman, T.J., Barynin, V.V., Sedelnikova, S.E., Tang, Y., Green, J., Guest, J.R., Artymiuk, P.J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free: 0.203 
• R-Value Work: 0.151 
• R-Value Observed: 0.154 

Literature

E. coli aconitase B structure reveals a HEAT-like domain with implications for protein-protein recognition.

Williams, C.H., Stillman, T.J., Barynin, V.V., Sedelnikova, S.E., Tang, Y., Green, J., Guest, J.R., Artymiuk, P.J.

(2002) Nat Struct Biol 9: 447-452

• PubMed: 11992126 
• DOI: 10.1038/nsb801
• Primary Citation of Related Structures:  
  1L5J


• PubMed Abstract: 
  

The major bifunctional aconitase of Escherichia coli (AcnB) serves as either an enzymic catalyst or a mRNA-binding post-transcriptional regulator, depending on the status of its iron sulfur cluster. AcnB represents a large, distinct group of Gram-negative bacterial aconitases that have an altered domain organization relative to mitochondrial aconitase and other aconitases. Here the 2.4 A structure of E. coli AcnB reveals a high degree of conservation at the active site despite its domain reorganization. It also reveals that the additional domain, characteristic of the AcnB subfamily, is a HEAT-like domain, implying a role in protein protein recognition. This domain packs against the remainder of the protein to form a tunnel leading to the aconitase active site, potentially for substrate channeling.

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Organizational Affiliation: 

Krebs Institute for Biomolecular Research, Department of Molecular Biology and Biotechnology, University of Sheffield, Firth Court, Western Bank, Sheffield S10 2TN, UK.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Aconitate hydratase 2	A, B	865	Escherichia coli	Mutation(s): 0  EC: 4.2.1.3 (PDB Primary Data), 4.2.1.99 (UniProt)
UniProt
Find proteins for P36683 (Escherichia coli (strain K12)) Explore P36683  Go to UniProtKB:  P36683

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
F3S	D [auth A], F [auth B]	FE3-S4 CLUSTER Fe3 S4 FCXHZBQOKRZXKS-MZMDZPPWAW
TRA	C [auth A], E [auth B]	ACONITATE ION C6 H3 O6 GTZCVFVGUGFEME-HNQUOIGGSA-K

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free: 0.203 
• R-Value Work: 0.151 
• R-Value Observed: 0.154 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 138.97	α = 90
b = 169.63	β = 90
c = 113.38	γ = 90

Software Package:

Software Name	Purpose
MLPHARE	phasing
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2002-03-07 
• Released Date: 2002-06-12 
Deposition Author(s): Williams, C.H., Stillman, T.J., Barynin, V.V., Sedelnikova, S.E., Tang, Y., Green, J., Guest, J.R., Artymiuk, P.J.

Revision History  

• Version 1.0: 2002-06-12
  Type: Initial release
  
• Version 1.1: 2008-04-28
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance