2JKI

Complex of Hsp90 N-terminal and Sgt1 CS domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.201 

Starting Models: experimental
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Ligand Structure Quality Assessment 


This is version 1.4 of the entry. See complete history


Literature

Structural and Functional Coupling of Hsp90- and Sgt1-Centred Multi-Protein Complexes.

Zhang, M.Boter, M.Li, K.Kadota, Y.Panaretou, B.Prodromou, C.Shirasu, K.Pearl, L.H.

(2008) EMBO J 27: 2789

  • DOI: https://doi.org/10.1038/emboj.2008.190
  • Primary Citation of Related Structures:  
    2JKI

  • PubMed Abstract: 

    Sgt1 is an adaptor protein implicated in a variety of processes, including formation of the kinetochore complex in yeast, and regulation of innate immunity systems in plants and animals. Sgt1 has been found to associate with SCF E3 ubiquitin ligases, the CBF3 kinetochore complex, plant R proteins and related animal Nod-like receptors, and with the Hsp90 molecular chaperone. We have determined the crystal structure of the core Hsp90-Sgt1 complex, revealing a distinct site of interaction on the Hsp90 N-terminal domain. Using the structure, we developed mutations in Sgt1 interfacial residues, which specifically abrogate interaction with Hsp90, and disrupt Sgt1-dependent functions in vivo, in plants and yeast. We show that Sgt1 bridges the Hsp90 molecular chaperone system to the substrate-specific arm of SCF ubiquitin ligase complexes, suggesting a role in SCF assembly and regulation, and providing multiple complementary routes for ubiquitination of Hsp90 client proteins.


  • Organizational Affiliation

    Section of Structural Biology, The Institute of Cancer Research, Chester Beatty Laboratories, London, UK.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
CYTOSOLIC HEAT SHOCK PROTEIN 90
A, B, C
223Hordeum vulgareMutation(s): 0 
UniProt
Find proteins for Q7XJ80 (Hordeum vulgare)
Explore Q7XJ80 
Go to UniProtKB:  Q7XJ80
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ7XJ80
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
SGT1-LIKE PROTEIND [auth S],
E [auth T],
F [auth U]
90Arabidopsis thalianaMutation(s): 0 
UniProt
Find proteins for Q9SUR9 (Arabidopsis thaliana)
Explore Q9SUR9 
Go to UniProtKB:  Q9SUR9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9SUR9
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.201 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 100.268α = 90
b = 129.654β = 90
c = 135.998γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-10-07
    Type: Initial release
  • Version 1.1: 2011-05-07
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2019-04-03
    Changes: Data collection, Experimental preparation, Other
  • Version 1.4: 2023-12-13
    Changes: Data collection, Database references, Other, Refinement description