2L6J

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 1.1 of the entry. See complete history

Literature

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: 10.1074/jbc.M111.287458

  • 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 ...

    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.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TPR repeat-containing protein associated with Hsp90
A
111Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: TAH1
Find proteins for P25638 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P25638
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
C-terminus Hsp90 chaperone peptide MEEVD
B
5Homo sapiensMutation(s): 0 
Gene Names: HSP90AB1 (HSP90B, HSPC2, HSPCB)
Find proteins for P08238 (Homo sapiens)
Go to Gene View: HSP90AB1
Go to UniProtKB:  P08238
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 500 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 
  • Olderado: 2L6J Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-12-28
    Type: Initial release
  • Version 1.1: 2012-05-09
    Type: Database references