2C2L

Crystal structure of the CHIP U-box E3 ubiquitin ligase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.3 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.247 

wwPDB Validation 3D Report Full Report


This is version 1.1 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

  • 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. T ...

    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

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CARBOXY TERMINUS OF HSP70-INTERACTING PROTEIN
A, B, C, D
281Mus musculusGene Names: Stub1 (Chip)
EC: 6.3.2.-
Find proteins for Q9WUD1 (Mus musculus)
Go to UniProtKB:  Q9WUD1
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
HSP90
E, F, G, H
9Homo sapiensGene Names: HSP90AA1 (HSP90A, HSPC1, HSPCA)
Find proteins for P07900 (Homo sapiens)
Go to Gene View: HSP90AA1
Go to UniProtKB:  P07900
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B, C, D
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
NI
Query on NI

Download SDF File 
Download CCD File 
B
NICKEL (II) ION
Ni
VEQPNABPJHWNSG-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.3 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.247 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 76.042α = 90.00
b = 204.406β = 90.75
c = 144.709γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
MOSFLMdata reduction
PHASERphasing
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-11-23
    Type: Initial release
  • Version 1.1: 2016-12-21
    Type: Database references, Derived calculations, Non-polymer description, Other, Refinement description, Source and taxonomy, Structure summary, Version format compliance