The structure of the R2T complex reveals a different architecture from the related HSP90 cochaperone R2TP

dc.contributor.affiliationInstituto Universitario Mixto de Biología Molecular y Celular de Plantas
dc.contributor.authorPalacios-Abella, Albertoes_ES
dc.contributor.authorLópez-Perrote, Andréses_ES
dc.contributor.authorBoskovic, Jasminkaes_ES
dc.contributor.authorFonseca, Sandraes_ES
dc.contributor.authorUrbez Lagunas, Cristina
dc.contributor.authorRubio, Vicentees_ES
dc.contributor.authorLlorca, Oscares_ES
dc.contributor.authorALABADÍ DIEGO, DAVID
dc.contributor.funderMinisterio de Educaciónes_ES
dc.contributor.funderInstituto de Salud Carlos IIIes_ES
dc.contributor.funderAgencia Estatal de Investigaciónes_ES
dc.contributor.funderEuropean Regional Development Fundes_ES
dc.date.accessioned2026-05-06T09:33:06Z
dc.date.available2026-05-06T09:33:06Z
dc.date.issued2025-04-03es_ES
dc.description.abstract[EN] The R2TP complex is a specialized HSP90 cochaperone essential for the maturation of macromolecular complexes such as RNAPII and TORC1. R2TP is formed by a hetero-hexameric ring of AAA-ATPases RuvBL1 and RuvBL2, which interact with RPAP3 and PIH1D1. Several R2TP-like complexes have been described, but these are less well characterized. Here, we identified, characterized and determined the cryo-electron microscopy (cryo-EM) structure of R2T from Arabidopsis thaliana, which lacks PIH1D1 and is probably the only form of the complex in seed plants. In contrast to R2TP, R2T is organized as two rings of AtRuvBL1-AtRuvBL2a interacting back-to-back, with one AtRPAP3 anchored per ring. AtRPAP3 has no effect on the ATPase activity of AtRuvBL1-AtRuvBL2a and binds with a different stoichiometry than in human R2TP. We show that the interaction of AtRPAP3 with AtRuvBL2a and AtHSP90 occurs via a conserved mechanism. However, the distinct architectures of R2T and R2TP suggest differences in their functions and mechanisms.es_ES
dc.description.accrualMethodSes_ES
dc.description.bibliographicCitationPalacios-Abella, A.; López-Perrote, A.; Boskovic, J.; Fonseca, S.; Urbez Lagunas, Cristina; Rubio, V.; Llorca, O.... (2025). The structure of the R2T complex reveals a different architecture from the related HSP90 cochaperone R2TP. Structure. 33(4):740-752. https://doi.org/10.1016/j.str.2025.01.023es_ES
dc.description.issue4es_ES
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dc.description.sponsorshipThe authors thank Prof. Toru Fujiwara (The University of Tokyo, Tokyo, Japan) for providing seeds of tpr5-2 and pAtRPAP3:AtRPAP3-GFP tpr5-2 Arabidopsis lines, and Johanne Le Coq and Carmen Garc & imath;a-Mart & imath;n for help in EM sample preparation and imaging. This research was funded by grants PID2019109925GB-I00 and PID2022-141447NB-I00 to D.A. and by grants PID2020114429RB-I00 and PID2023-146110NB-I00 to O.L. funded by the Spanish MCIN/AEI/10.13039/501100011033 and by the European Union Regional Development Fund (ERDF) "A way of making Europe". A.P.-A. was supported by a Ministerio de Educacion predoctoral contract (FPU17/05186). O.L. laboratory also had the support from the National Institute of Health Carlos III to CNIO. Cryo-EM data used in this work for the structure of R2T was obtained at the Diamond Light Source cryo-EM facility at the UK's National Electron Bio-imaging Center (eBIC) under BAG Proposal No BI26876 "Stop cancer-structural studies of macromolecular complexes involved in cancer by cryo-EM".es_ES
dc.description.upvformatpfin752es_ES
dc.description.upvformatpinicio740es_ES
dc.description.volume33es_ES
dc.identifier.doi10.1016/j.str.2025.01.023es_ES
dc.identifier.issn0969-2126es_ES
dc.identifier.pmid40015274es_ES
dc.identifier.urihttps://riunet.upv.es/handle/10251/234939
dc.languageIngléses_ES
dc.publisherElsevieres_ES
dc.relation.ispartofStructurees_ES
dc.relation.pasarelaS\581256es_ES
dc.relation.projectIDinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-109925GB-I00/ES/PAPEL DE LAS PREFOLDIN-LIKE EN SEÑALIZACION AMBIENTAL Y HOMEOSTASIS DE PROTEINAS EN ARABIDOPSIS/es_ES
dc.relation.projectIDinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-114429RB-I00/ES/BASES ESTRUCTURALES Y MOLECULARES DEL ENSAMBLAJE Y ACTIVACION DEL COMPLEJO MTORC1 POR EL SISTEMA CHAPERONA R2TP-HSP90 /es_ES
dc.relation.projectIDinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2022-141447NB-I00/ES/REGULACION POST-TRANSCRIPCIONAL DE LA RESPUESTA DE LA PLANTA A ALTAS TEMPERATURAS POR EL COMPLEJO R2TP%2FPREFOLDIN-LIKE/es_ES
dc.relation.projectIDinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2023-146110NB-I00/ES/BASES ESTRUCTURALES Y MECANISMOS EN EL ENSAMBLAJE Y ACTIVACION DE LAS QUINASAS DE LA FAMILIA PIKK/es_ES
dc.relation.projectIDinfo:eu-repo/grantAgreement/ME//FPU17%2F05186/es_ES
dc.relation.publisherversionhttps://doi.org/10.1016/j.str.2025.01.023es_ES
dc.rightsReconocimiento - No comercial - Sin obra derivada (by-nc-nd)es_ES
dc.rights.accessRightsAbiertoes_ES
dc.subjectR2TP complexes_ES
dc.subjectHSP90 cochaperonees_ES
dc.subjectArabidopsis thalianaes_ES
dc.subjectCryo-electron microscopyes_ES
dc.subjectAAA-ATPaseses_ES
dc.subjectProtein interactionses_ES
dc.titleThe structure of the R2T complex reveals a different architecture from the related HSP90 cochaperone R2TPes_ES
dc.typeArtículoes_ES
dc.type.versioninfo:eu-repo/semantics/publishedVersiones_ES
dspace.entity.typePublication
person.identifier247069
person.identifier266783
person.identifier.orcid0000-0001-9345-7322
person.identifier.orcid0000-0001-8492-6713
relation.isAuthorOfPublicationcff61cd3-5b61-4e1d-82a4-02ae85bed1d5
relation.isAuthorOfPublication1f621e29-53a4-48b8-9078-820c290fae99
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upv.uuidcc650ada-9a11-4816-91a1-a72df881b0b6es_ES

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