Tah1 complexed by MEEVD

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 500 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


Structure of minimal tetratricopeptide repeat domain protein Tah1 reveals mechanism of its interaction with Pih1 and Hsp90.

Jimenez, B.Ugwu, F.Zhao, R.Orti, L.Makhnevych, T.Pineda-Lucena, A.Houry, W.A.

(2012) J Biol Chem 287: 5698-5709

  • DOI: https://doi.org/10.1074/jbc.M111.287458
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Tah1 and Pih1 are novel Hsp90 interactors. Tah1 acts as a cofactor of Hsp90 to stabilize Pih1. In yeast, Hsp90, Tah1, and Pih1 were found to form a complex that is required for ribosomal RNA processing through their effect on box C/D small nucleolar ribonucleoprotein assembly. Tah1 is a minimal tetratricopeptide repeat protein of 111 amino acid residues that binds to the C terminus of the Hsp90 molecular chaperone, whereas Pih1 consists of 344 residues of unknown fold. The NMR structure of Tah1 has been solved, and this structure shows the presence of two tetratricopeptide repeat motifs followed by a C helix and an unstructured region. The binding of Tah1 to Hsp90 is mediated by the EEVD C-terminal residues of Hsp90, which bind to a positively charged channel formed by Tah1. Five highly conserved residues, which form a two-carboxylate clamp that tightly interacts with the ultimate Asp-0 residue of the bound peptide, are also present in Tah1. Tah1 was found to bind to the C terminus of Pih1 through the C helix and the unstructured region. The C terminus of Pih1 destabilizes the protein in vitro and in vivo, whereas the binding of Tah1 to Pih1 allows for the formation of a stable complex. Based on our data, a model for an Hsp90-Tah1-Pih1 ternary complex is proposed.

  • Organizational Affiliation

    Structural Biochemistry Laboratory, Medicinal Chemistry Department, Centro de Investigación Príncipe Felipe, E-46012 Valencia, Spain.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
TPR repeat-containing protein associated with Hsp90111Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: TAH1TAH1 YCR060W YCR60WYCR060WYCR60W
Find proteins for P25638 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P25638 
Go to UniProtKB:  P25638
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP25638
Sequence Annotations
  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
C-terminus Hsp90 chaperone peptide MEEVD5synthetic constructMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P08238 (Homo sapiens)
Explore P08238 
Go to UniProtKB:  P08238
GTEx:  ENSG00000096384 
Entity Groups  
UniProt GroupP08238
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 500 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-12-28
    Type: Initial release
  • Version 1.1: 2012-05-09
    Changes: Database references
  • Version 1.2: 2020-02-05
    Changes: Data collection, Other