Article (Scientific journals)
Deep Structural Analysis of RPAP3 and PIH1D1, Two Components of the HSP90 Co-chaperone R2TP Complex.
Henri, Julien; Chagot, Marie-Eve; Bourguet, Maxime et al.
2018In Structure (London, England : 1993), 26 (9), p. 1196-1209.e8
Peer reviewed
 

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Keywords :
Apoptosis Regulatory Proteins/chemistry/metabolism; Binding Sites; Carrier Proteins/chemistry/metabolism; Cell Line; HSP72 Heat-Shock Proteins/metabolism; HSP90 Heat-Shock Proteins/metabolism; Humans; Models, Molecular; Protein Binding; Protein Conformation; Protein Domains; Protein Isoforms/chemistry/metabolism; Protein Multimerization; ATPase; HSP70; HSP90; NMR; PIH1D1; R2TP; RPAP3; RUVBL; X-ray; chaperones; machinery assembly
Abstract :
[en] RPAP3 and PIH1D1 are part of the HSP90 co-chaperone R2TP complex involved in the assembly process of many molecular machines. In this study, we performed a deep structural investigation of the HSP binding abilities of the two TPR domains of RPAP3. We combined 3D NMR, non-denaturing MS, and ITC techniques with Y2H, IP-LUMIER, FRET, and ATPase activity assays and explain the fundamental role played by the second TPR domain of RPAP3 in the specific recruitment of HSP90. We also established the 3D structure of an RPAP3:PIH1D1 sub-complex demonstrating the need for a 34-residue insertion, specific of RPAP3 isoform 1, for the tight binding of PIH1D1. We also confirm the existence of a complex lacking PIH1D1 in human cells (R2T), which shows differential binding to certain clients. These results highlight similarities and differences between the yeast and human R2TP complexes, and document the diversification of this family of co-chaperone complexes in human.
Disciplines :
Biochemistry, biophysics & molecular biology
Author, co-author :
Henri, Julien ;  Université de Liège - ULiège > HEC Liège : UER > UER Finance et Droit : Gestion financière
Chagot, Marie-Eve
Bourguet, Maxime
Abel, Yoann
Terral, Guillaume
Maurizy, Chloé  ;  Université de Liège - ULiège > GIGA Stem Cells - Medical Chemistry
Aigueperse, Christelle
Georgescauld, Florian
Vandermoere, Franck
Saint-Fort, Rénette
Behm-Ansmant, Isabelle
Charpentier, Bruno
Pradet-Balade, Bérengère
Verheggen, Céline
Bertrand, Edouard
Meyer, Philippe
Cianférani, Sarah
Manival, Xavier
Quinternet, Marc
More authors (9 more) Less
Language :
English
Title :
Deep Structural Analysis of RPAP3 and PIH1D1, Two Components of the HSP90 Co-chaperone R2TP Complex.
Publication date :
2018
Journal title :
Structure (London, England : 1993)
ISSN :
0969-2126
eISSN :
1878-4186
Volume :
26
Issue :
9
Pages :
1196-1209.e8
Peer reviewed :
Peer reviewed
Commentary :
Copyright © 2018 Elsevier Ltd. All rights reserved.
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since 10 June 2021

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