2MNJ

NMR solution structure of the yeast Pih1 and Tah1 C-terminal domains complex


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • 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/Function Analysis of Protein-Protein Interactions Developed by the Yeast Pih1 Platform Protein and Its Partners in Box C/D snoRNP Assembly.

Quinternet, M.Rothe, B.Barbier, M.Bobo, C.Saliou, J.M.Jacquemin, C.Back, R.Chagot, M.E.Cianferani, S.Meyer, P.Branlant, C.Charpentier, B.Manival, X.

(2015) J.Mol.Biol. 427: 2816-2839

  • DOI: 10.1016/j.jmb.2015.07.012

  • PubMed Abstract: 
  • In eukaryotes, nucleotide post-transcriptional modifications in RNAs play an essential role in cell proliferation by contributing to pre-ribosomal RNA processing, ribosome assembly and activity. Box C/D small nucleolar ribonucleoparticles catalyze si ...

    In eukaryotes, nucleotide post-transcriptional modifications in RNAs play an essential role in cell proliferation by contributing to pre-ribosomal RNA processing, ribosome assembly and activity. Box C/D small nucleolar ribonucleoparticles catalyze site-specific 2'-O-methylation of riboses, one of the most prevalent RNA modifications. They contain one guide RNA and four core proteins and their in vivo assembly requires numerous factors including (HUMAN/Yeast) BCD1/Bcd1p, NUFIP1/Rsa1p, ZNHIT3/Hit1p, the R2TP complex composed of protein PIH1D1/Pih1p and RPAP3/Tah1p that bridges the R2TP complex to the HSP90/Hsp82 chaperone and two AAA+ ATPases. We show that Tah1p can stabilize Pih1p in the absence of Hsp82 activity during the stationary phase of growth and consequently that the Tah1p:Pih1p interaction is sufficient for Pih1p stability. This prompted us to establish the solution structure of the Tah1p:Pih1p complex by NMR. The C-terminal tail S93-S111 of Tah1p snakes along Pih1p264-344 folded in a CS domain to form two intermolecular β-sheets and one covering loop. However, a thorough inspection of the NMR and crystal structures revealed structural differences that may be of functional importance. In addition, our NMR and isothermal titration calorimetry data revealed the formation of direct contacts between Pih1p257-344 and the Hsp82MC domain in the presence of Tah1p. By co-expression in Escherichia coli, we demonstrate that Pih1p has two other direct partners, the Rsa1p assembly factor and the Nop58p core protein, and in vivo and in vitro experiments mapped the required binding domains. Our data suggest that these two interactions are mutually exclusive. The implication of this finding for box C/D small nucleolar ribonucleoparticle assembly is discussed.


    Organizational Affiliation

    FR 3209 CNRS-Université de Lorraine, Bioingénierie Moléculaire, Cellulaire et Thérapeutique, Biopôle, Campus Biologie-Santé, CS 50184, 54505 Vandœuvre-lès-Nancy Cedex, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TPR repeat-containing protein associated with Hsp90
A
23Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: TAH1
Find proteins for P25638 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P25638
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Protein interacting with Hsp90 1
B
88Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: PIH1 (NOP17)
Find proteins for P38768 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P38768
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-08-05
    Type: Initial release
  • Version 1.1: 2015-09-02
    Type: Database references