1ONS

Crystal structure of Escherichia coli heat shock protein YedU


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.204 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The crystal structure of Escherichia coli heat shock protein YedU reveals three potential catalytic active sites

Zhao, Y.Liu, D.Kaluarachchi, W.D.Bellamy, H.D.White, M.A.Fox, R.O.

(2003) Protein Sci. 12: 2303-2311

  • DOI: 10.1110/ps.03121403

  • PubMed Abstract: 
  • The mRNA of Escherichia coli yedU gene is induced 31-fold upon heat shock. The 31-kD YedU protein, also calls Hsp31, is highly conserved in several human pathogens and has chaperone activity. We solved the crystal structure of YedU at 2.2 A resolutio ...

    The mRNA of Escherichia coli yedU gene is induced 31-fold upon heat shock. The 31-kD YedU protein, also calls Hsp31, is highly conserved in several human pathogens and has chaperone activity. We solved the crystal structure of YedU at 2.2 A resolution. YedU monomer has an alpha/beta/alpha sandwich domain and a small alpha/beta domain. YedU is a dimer in solution, and its crystal structure indicates that a significant amount of surface area is buried upon dimerization. There is an extended hydrophobic patch that crosses the dimer interface on the surface of the protein. This hydrophobic patch is likely the substrate-binding site responsible for the chaperone activity. The structure also reveals a potential protease-like catalytic triad composed of Cys184, His185, and Asp213, although no enzymatic activity could be identified. YedU coordinates a metal ion using His85, His122, and Glu90. This 2-His-1-carboxylate motif is present in carboxypeptidase A (a zinc enzyme), and a number of dioxygenases and hydroxylases that utilize iron as a cofactor, suggesting another potential function for YedU.


    Organizational Affiliation

    Department of Physiology and Biophysics, and The Graduate Program in Cellular Physiology and Molecular Biophysics, The University of Texas Medical Branch at Galveston, Galveston, Texas 77555, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Chaperone protein hchA
A
282Escherichia coli (strain K12)Gene Names: hchA (yedU, yzzC)
EC: 3.4.11.-, 4.2.1.130
Find proteins for P31658 (Escherichia coli (strain K12))
Go to UniProtKB:  P31658
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.204 
  • Space Group: P 61 2 2
Unit Cell:
Length (Å)Angle (°)
a = 52.980α = 90.00
b = 52.980β = 90.00
c = 347.400γ = 120.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
XFITdata reduction
CNSrefinement
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2003-02-28 
  • Released Date: 2004-01-20 
  • Deposition Author(s): Zhao, Y., Fox, R.O.

Revision History 

  • Version 1.0: 2004-01-20
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance