NMR structure of the C-terminal domain of the human RPAP3 protein

Experimental Data Snapshot

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

wwPDB Validation   3D Report Full Report

This is version 1.3 of the entry. See complete history


The RPAP3-Cterminal domain identifies R2TP-like quaternary chaperones.

Maurizy, C.Quinternet, M.Abel, Y.Verheggen, C.Santo, P.E.Bourguet, M.C F Paiva, A.Bragantini, B.Chagot, M.E.Robert, M.C.Abeza, C.Fabre, P.Fort, P.Vandermoere, F.M F Sousa, P.Rain, J.C.Charpentier, B.Cianferani, S.Bandeiras, T.M.Pradet-Balade, B.Manival, X.Bertrand, E.

(2018) Nat Commun 9: 2093-2093

  • DOI: https://doi.org/10.1038/s41467-018-04431-1
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    R2TP is an HSP90 co-chaperone that assembles important macro-molecular machineries. It is composed of an RPAP3-PIH1D1 heterodimer, which binds the two essential AAA+ATPases RUVBL1/RUVBL2. Here, we resolve the structure of the conserved C-terminal domain of RPAP3, and we show that it directly binds RUVBL1/RUVBL2 hexamers. The human genome encodes two other proteins bearing RPAP3-C-terminal-like domains and three containing PIH-like domains. Systematic interaction analyses show that one RPAP3-like protein, SPAG1, binds PIH1D2 and RUVBL1/2 to form an R2TP-like complex termed R2SP. This co-chaperone is enriched in testis and among 68 of the potential clients identified, some are expressed in testis and others are ubiquitous. One substrate is liprin-α2, which organizes large signaling complexes. Remarkably, R2SP is required for liprin-α2 expression and for the assembly of liprin-α2 complexes, indicating that R2SP functions in quaternary protein folding. Effects are stronger at 32 °C, suggesting that R2SP could help compensating the lower temperate of testis.

  • Organizational Affiliation

    IGMM, CNRS, Université de Montpellier, Montpellier, 34293, France.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
RNA polymerase II-associated protein 3135Homo sapiensMutation(s): 0 
Gene Names: RPAP3
UniProt & NIH Common Fund Data Resources
Find proteins for Q9H6T3 (Homo sapiens)
Explore Q9H6T3 
Go to UniProtKB:  Q9H6T3
GTEx:  ENSG00000005175 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9H6T3
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

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

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
French National Research AgencyFrance--

Revision History  (Full details and data files)

  • Version 1.0: 2018-04-18
    Type: Initial release
  • Version 1.1: 2018-06-13
    Changes: Data collection, Database references
  • Version 1.2: 2019-05-08
    Changes: Data collection
  • Version 1.3: 2024-01-17
    Changes: Data collection, Database references