2C2L

Crystal structure of the CHIP U-box E3 ubiquitin ligase

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.247 
  • R-Value Observed: 0.247 

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This is version 1.3 of the entry. See complete history. 


Literature

Chaperoned Ubiquitylation-Crystal Structures of the Chip U Box E3 Ubiquitin Ligase and a Chip-Ubc13-Uev1A Complex

Zhang, M., Windheim, M., Roe, S.M., Peggie, M., Cohen, P., Prodromou, C., Pearl, L.H.

(2005) Mol Cell 20: 525

  • DOI: 10.1016/j.molcel.2005.09.023
  • Primary Citation of Related Structures:  
    2C2V, 2C2L

  • PubMed Abstract: 

    • CHIP is a dimeric U box E3 ubiquitin ligase that binds Hsp90 and/or Hsp70 via its TPR-domain, facilitating ubiquitylation of chaperone bound client proteins. We have determined the crystal structure of CHIP bound to an Hsp90 C-terminal decapeptide. The structure explains how CHIP associates with either chaperone type and reveals an unusual asymmetric homodimer in which the protomers adopt radically different conformations ...

    CHIP is a dimeric U box E3 ubiquitin ligase that binds Hsp90 and/or Hsp70 via its TPR-domain, facilitating ubiquitylation of chaperone bound client proteins. We have determined the crystal structure of CHIP bound to an Hsp90 C-terminal decapeptide. The structure explains how CHIP associates with either chaperone type and reveals an unusual asymmetric homodimer in which the protomers adopt radically different conformations. Additionally, we identified CHIP as a functional partner of Ubc13-Uev1a in formation of Lys63-linked polyubiquitin chains, extending CHIP's roles into ubiquitin regulation as well as targeted destruction. The structure of Ubc13-Uev1a bound to the CHIP U box domain defines the basis for selective cooperation of CHIP with specific ubiquitin-conjugating enzymes. Remarkably, the asymmetric arrangement of the TPR domains in the CHIP dimer occludes one Ubc binding site, so that CHIP operates with half-of-sites activity, providing an elegant means for coupling a dimeric chaperone to a single ubiquitylation system.

    Organizational Affiliation: 

    Section of Structural Biology, Institute of Cancer Research, Chester Beatty Laboratories, 237 Fulham Road, London SW3 6JB, United Kingdom.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CARBOXY TERMINUS OF HSP70-INTERACTING PROTEIN A, B, C, D281Mus musculusMutation(s): 0 
Gene Names: Stub1, Chip
EC: 2.3.2.27
Find proteins for Q9WUD1 (Mus musculus)
Explore Q9WUD1 
Go to UniProtKB:  Q9WUD1
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
HSP90 E, F, G, H9Homo sapiensMutation(s): 0 
Gene Names: HSP90AA1, HSP90A, HSPC1, HSPCA
Find proteins for P07900 (Homo sapiens)
Explore P07900 
Go to UniProtKB:  P07900
NIH Common Fund Data Resources
PHAROS:  P07900
GTEx:  ENSG00000080824
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.247 
  • R-Value Observed: 0.247 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 76.042α = 90
b = 204.406β = 90.75
c = 144.709γ = 90
Software Package:
Software NamePurpose
CNSrefinement
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-11-23
    Type: Initial release
  • Version 1.1: 2016-12-21
    Changes: Database references, Derived calculations, Non-polymer description, Other, Refinement description, Source and taxonomy, Structure summary, Version format compliance
  • Version 1.2: 2019-03-06
    Changes: Data collection, Experimental preparation, Other
  • Version 1.3: 2019-05-15
    Changes: Data collection, Experimental preparation