1EJF

CRYSTAL STRUCTURE OF THE HUMAN CO-CHAPERONE P23


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.49 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.236 
  • R-Value Observed: 0.238 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Crystal structure and activity of human p23, a heat shock protein 90 co-chaperone.

Weaver, A.J.Sullivan, W.P.Felts, S.J.Owen, B.A.Toft, D.O.

(2000) J Biol Chem 275: 23045-23052

  • DOI: 10.1074/jbc.M003410200
  • Primary Citation of Related Structures:  
    1EJF

  • PubMed Abstract: 
  • p23 is a co-chaperone for the heat shock protein, hsp90. This protein binds hsp90 and participates in the folding of a number of cell regulatory proteins, but its activities are still unclear. We have solved a crystal structure of human p23 lacking 3 ...

    p23 is a co-chaperone for the heat shock protein, hsp90. This protein binds hsp90 and participates in the folding of a number of cell regulatory proteins, but its activities are still unclear. We have solved a crystal structure of human p23 lacking 35 residues at the COOH terminus. The structure reveals a disulfide-linked dimer with each subunit containing eight beta-strands in a compact antiparallel beta-sandwich fold. In solution, however, p23 is primarily monomeric and the dimer appears to be a minor component. Conserved residues are clustered on one face of the monomer and define a putative surface region and binding pocket for interaction(s) with hsp90 or protein substrates. p23 contains a COOH-terminal tail that is apparently less structured and is unresolved in the crystal structure. This tail is not needed for the binding of p23 to hsp90 or to complexes with the progesterone receptor. However, the tail is necessary for optimum active chaperoning of the progesterone receptor, as well as the passive chaperoning activity of p23 in assays measuring inhibition of heat-induced protein aggregation.


    Organizational Affiliation

    hkl Research, Inc., Ithaca, New York 14853, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PROGESTERONE RECEPTOR P23AB125Homo sapiensMutation(s): 0 
Gene Names: PTGES3P23TEBP
EC: 5.3.99.3
Find proteins for Q15185 (Homo sapiens)
Explore Q15185 
Go to UniProtKB:  Q15185
NIH Common Fund Data Resources
PHAROS  Q15185
Protein Feature View
Expand
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.49 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.236 
  • R-Value Observed: 0.238 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 61.802α = 90
b = 61.802β = 90
c = 162.888γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
MLPHAREphasing
CNSrefinement
CCP4data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-06-19
    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: 2019-12-18
    Changes: Data collection, Derived calculations