1DJ8

CRYSTAL STRUCTURE OF E. COLI PERIPLASMIC PROTEIN HDEA

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.209 
  • R-Value Observed: 0.209 

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This is version 1.3 of the entry. See complete history. 


Literature

HDEA, a periplasmic protein that supports acid resistance in pathogenic enteric bacteria.

Gajiwala, K.S., Burley, S.K.

(2000) J Mol Biol 295: 605-612

  • DOI: https://doi.org/10.1006/jmbi.1999.3347
  • Primary Citation of Related Structures:  
    1DJ8

  • PubMed Abstract: 

    The X-ray crystal structure of the Escherichia coli stress response protein HDEA has been determined at 2.0 A resolution. The single domain alpha-helical protein is found in the periplasmic space, where it supports an acid resistance phenotype essential for infectivity of enteric bacterial pathogens, such as Shigella and E. coli. Functional studies demonstrate that HDEA is activated by a dimer-to-monomer transition at acidic pH, leading to suppression of aggregation by acid-denatured proteins. We suggest that HDEA may support chaperone-like functions during the extremely acidic conditions.

    • Organizational Affiliation: 

    Laboratorie of Molecular Biophysics, Howard Hughes Medical Institute, New York, 10021, USA.


Macromolecules
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(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
PROTEIN HNS-DEPENDENT EXPRESSION A
A, B, C, D, E
A, B, C, D, E, F
89Escherichia coliMutation(s): 0 
UniProt
Find proteins for P0AES9 (Escherichia coli (strain K12))
Explore P0AES9 
Go to UniProtKB:  P0AES9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0AES9
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.209 
  • R-Value Observed: 0.209 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 47α = 90
b = 73.6β = 96.8
c = 74.3γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
CNSrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1999-12-10
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2021-02-03
    Changes: Database references, Structure summary