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Updated: Jun 7, 2026

In Situ Monitoring of Transiently Formed Molecular Chaperone Assemblies in Bacteria, Yeast, and Human Cells
Published on: September 2, 2019
Insights into the function and structure of the R2TP (RUVBL1-RUVBL2-RPAP3-PIH1D1)chaperone complex.
Maryama Mohamed1, Ruikai Wu2, Walid A Houry3
1Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada.
The R2TP chaperone complex, involving RUVBL1 and RUVBL2, aids in assembling vital cellular machinery. This review details its role in diverse processes like gene regulation and cell growth.
Area of Science:
- Cell Biology
- Molecular Biology
- Biochemistry
Background:
- The R2TP chaperone complex, composed of RUVBL1, RUVBL2, RPAP3, and PIH1D1, collaborates with HSP90 and HSP70.
- It plays a crucial role in assembling macromolecular complexes essential for cell growth and proliferation.
- Adaptors confer substrate specificity, but the exact assembly mechanism is unclear.
Purpose of the Study:
- To review current knowledge on the R2TP complex's function.
- To summarize its involvement in various cellular processes and complexes.
- To examine recent structural studies of R2TP.
Main Methods:
- Literature review of existing research on the R2TP complex.
- Analysis of studies on R2TP's role in protein complex assembly and stabilization.
- Examination of structural data related to R2TP and its interacting partners.
Main Results:
- R2TP is involved in the assembly and activity of numerous complexes, including snoRNPs, snRNPs, PIKKs, and the MRN complex.
- It contributes to ciliogenesis, circadian rhythm regulation, and transcriptional condensate formation.
- Recent structural studies offer insights into R2TP-mediated assembly.
Conclusions:
- The R2TP complex is a key regulator of diverse cellular functions through its role in macromolecular assembly.
- Further structural and mechanistic studies are needed to fully elucidate R2TP's functions.
- Understanding R2TP is critical for comprehending cell growth, proliferation, and related diseases.
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