2Y4T

Crystal structure of the human co-chaperone P58(IPK)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.291 
  • R-Value Work: 0.243 
  • R-Value Observed: 0.246 

wwPDB Validation 3D Report Full Report



Literature

The Crystal Structure of the Human Co-Chaperone P58Ipk

Svard, M.Biterova, E.I.Bourhis, J.-M.Guy, J.E.

(2011) PLoS One 6: 22337

  • DOI: 10.1371/journal.pone.0022337
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • P58(IPK) is one of the endoplasmic reticulum- (ER-) localised DnaJ (ERdj) proteins which interact with the chaperone BiP, the mammalian ER ortholog of Hsp70, and are thought to contribute to the specificity and regulation of its diverse functions. P5 ...

    P58(IPK) is one of the endoplasmic reticulum- (ER-) localised DnaJ (ERdj) proteins which interact with the chaperone BiP, the mammalian ER ortholog of Hsp70, and are thought to contribute to the specificity and regulation of its diverse functions. P58(IPK), expression of which is upregulated in response to ER stress, has been suggested to act as a co-chaperone, binding un- or misfolded proteins and delivering them to BiP. In order to give further insights into the functions of P58(IPK), and the regulation of BiP by ERdj proteins, we have determined the crystal structure of human P58(IPK) to 3.0 Å resolution using a combination of molecular replacement and single wavelength anomalous diffraction. The structure shows the human P58(IPK) monomer to have a very elongated overall shape. In addition to the conserved J domain, P58(IPK) contains nine N-terminal tetratricopeptide repeat motifs, divided into three subdomains of three motifs each. The J domain is attached to the C-terminal end via a flexible linker, and the structure shows the conserved Hsp70-binding histidine-proline-aspartate (HPD) motif to be situated on the very edge of the elongated protein, 100 Å from the putative binding site for unfolded protein substrates. The residues that comprise the surface surrounding the HPD motif are highly conserved in P58(IPK) from other organisms but more varied between the human ERdj proteins, supporting the view that their regulation of different BiP functions is facilitated by differences in BiP-binding.


    Organizational Affiliation

    Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DNAJ HOMOLOG SUBFAMILY C MEMBER 3
A, B, C
450Homo sapiensMutation(s): 0 
Gene Names: DNAJC3P58IPKPRKRI
Find proteins for Q13217 (Homo sapiens)
Go to UniProtKB:  Q13217
NIH Common Fund Data Resources
PHAROS  Q13217
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.291 
  • R-Value Work: 0.243 
  • R-Value Observed: 0.246 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 212.25α = 90
b = 212.25β = 90
c = 283.46γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-08-10
    Type: Initial release