4XKK

Crystal structure of N-terminal domain of Hsp90 from Dictyostelium discoideum


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.218 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Heat shock protein 90 regulates development in Dictyostelium discoideum

Sawarkar, R.Roy, N.Rao, S.Raman, S.Venketesh, S.Suguna, K.Tatu, U.

(2008) J. Mol. Biol. 383: 24-35

  • DOI: 10.1016/j.jmb.2008.08.006

  • PubMed Abstract: 
  • Cytosolic heat shock protein 90 (Hsp90) has been implicated in diverse biological processes such as protein folding, cell cycle control, signal transduction, development, and morphological evolution. Model systems available for studying Hsp90 functio ...

    Cytosolic heat shock protein 90 (Hsp90) has been implicated in diverse biological processes such as protein folding, cell cycle control, signal transduction, development, and morphological evolution. Model systems available for studying Hsp90 function either allow ease of manipulation for biochemical studies or facilitate a phenomenological study of its role in influencing phenotype. In this work, we have explored the use of the cellular slime mold Dictyostelium discoideum to examine cellular functions of Hsp90 in relation to its multicellular development. In addition to cloning, purification, biochemical characterization, and examination of its crystal structure, our studies, using a pharmacological inhibitor of Hsp90, demonstrate a role for the cytoplasmic isoform (HspD) in D. discoideum development. Inhibition of HspD function using geldanamycin (GA) resulted in delayed aggregation and arrest of D. discoideum development at the 'mound' stage. Crystal structure of the amino-terminal domain of HspD showed a binding pocket similar to that described for yeast Hsp90. Fluorescence spectroscopy, as well as GA-coupled beads affinity pulldown, confirmed a specific interaction between HspD and GA. The results presented here provide an important insight into the function of HspD in D. discoideum development and emphasize the potential of the cellular slime mold to serve as an effective model for studying the many roles of Hsp90 at cellular and organismal levels.


    Organizational Affiliation

    Molecular Reproduction, Development, and Genetics, Indian Institute of Science, Bangalore 560 012, India.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Heat shock cognate 90 kDa protein
A
259Dictyostelium discoideumMutation(s): 0 
Gene Names: hspD (hsc90, hsp90)
Find proteins for P54651 (Dictyostelium discoideum)
Go to UniProtKB:  P54651
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.218 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 41.240α = 90.00
b = 44.860β = 107.53
c = 60.249γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2015-01-12 
  • Released Date: 2015-01-28 
  • Deposition Author(s): Raman, S., Suguna, K.

Revision History 

  • Version 1.0: 2015-01-28
    Type: Initial release