6NSV

Crystal structure of the human CHIP TPR domain in complex with a 5mer acetylated optimized peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.30 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.214 
  • R-Value Observed: 0.215 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Specificity for latent C termini links the E3 ubiquitin ligase CHIP to caspases.

Ravalin, M.Theofilas, P.Basu, K.Opoku-Nsiah, K.A.Assimon, V.A.Medina-Cleghorn, D.Chen, Y.F.Bohn, M.F.Arkin, M.Grinberg, L.T.Craik, C.S.Gestwicki, J.E.

(2019) Nat Chem Biol 15: 786-794

  • DOI: https://doi.org/10.1038/s41589-019-0322-6
  • Primary Citation of Related Structures:  
    6EFK, 6NSV

  • PubMed Abstract: 

    Protein-protein interactions between E3 ubiquitin ligases and protein termini help shape the proteome. These interactions are sensitive to proteolysis, which alters the ensemble of cellular N and C termini. Here we describe a mechanism wherein caspase activity reveals latent C termini that are then recognized by the E3 ubiquitin ligase CHIP. Using expanded knowledge of CHIP's binding specificity, we predicted hundreds of putative interactions arising from caspase activity. Subsequent validation experiments confirmed that CHIP binds the latent C termini at tau D421 and caspase-6 D179 . CHIP binding to tau D421 , but not tau FL , promoted its ubiquitination, while binding to caspase-6 D179 mediated ubiquitin-independent inhibition. Given that caspase activity generates tau D421 in Alzheimer's disease (AD), these results suggested a concise model for CHIP regulation of tau homeostasis. Indeed, we find that loss of CHIP expression in AD coincides with the accumulation of tau D421 and caspase-6 D179 . These results illustrate an unanticipated link between caspases and protein homeostasis.


  • Organizational Affiliation

    Department of Pharmaceutical Chemistry, University of California at San Francisco, San Francisco, CA, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
E3 ubiquitin-protein ligase CHIP
A, B
130Homo sapiensMutation(s): 0 
Gene Names: STUB1CHIPPP1131
EC: 2.3.2.27
UniProt & NIH Common Fund Data Resources
Find proteins for Q9UNE7 (Homo sapiens)
Explore Q9UNE7 
Go to UniProtKB:  Q9UNE7
PHAROS:  Q9UNE7
GTEx:  ENSG00000103266 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9UNE7
Sequence Annotations
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  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
ACE-LEU-TRP-TRP-PRO-ASP
C, D
6synthetic constructMutation(s): 0 
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.30 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.214 
  • R-Value Observed: 0.215 
  • Space Group: P 2 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 46.219α = 90
b = 71.92β = 90
c = 77.79γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
MOSFLMdata reduction
Aimlessdata scaling
BALBESphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2019-07-31
    Type: Initial release
  • Version 1.1: 2023-10-11
    Changes: Data collection, Database references, Derived calculations, Refinement description