1L5J

CRYSTAL STRUCTURE OF E. COLI ACONITASE B.


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 

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This is version 1.3 of the entry. See complete history


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

  • DOI: https://doi.org/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.


  • 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
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Aconitate hydratase 2
A, B
865Escherichia coliMutation(s): 0 
EC: 4.2.1.3
UniProt
Find proteins for P36683 (Escherichia coli (strain K12))
Explore P36683 
Go to UniProtKB:  P36683
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP36683
Sequence Annotations
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  • Reference Sequence
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 = 138.97α = 90
b = 169.63β = 90
c = 113.38γ = 90
Software Package:
Software NamePurpose
MLPHAREphasing
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • 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
  • Version 1.3: 2024-02-14
    Changes: Data collection, Database references, Derived calculations