Identification of ubiquitin-proteasome system components affecting the degradation of the transcription factor Pap1
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- dc.contributor.author Marte, Luis, 1990-
- dc.contributor.author Boronat i Llop, Susanna, 1965-
- dc.contributor.author García Santamarina, Sarela, 1978-
- dc.contributor.author Ayté del Olmo, José
- dc.contributor.author Kitamura, Kenji
- dc.contributor.author Hidalgo Hernando, Elena
- dc.date.accessioned 2019-10-07T10:51:02Z
- dc.date.available 2019-10-07T10:51:02Z
- dc.date.issued 2020
- dc.description.abstract Signaling cascades respond to specific inputs, but also require active interventions to be maintained in their basal/inactive levels in the absence of the activating signal(s). In a screen to search for protein quality control components required for wild-type tolerance to oxidative stress in fission yeast, we have isolated eight gene deletions conferring resistance not only to H2O2 but also to caffeine. We show that dual resistance acquisition is totally or partially dependent on the transcription factor Pap1. Some gene products, such as the ribosomal-ubiquitin fusion protein Ubi1, the E2 conjugating enzyme Ubc2 or the E3 ligase Ubr1, participate in basal ubiquitin labeling of Pap1, and others, such as Rpt4, are non-essential constituents of the proteasome. We demonstrate here that basal nucleo-cytoplasmic shuttling of Pap1, occurring even in the absence of stress, is sufficient for the interaction of the transcription factor with nuclear Ubr1, and we identify a 30 amino acids peptide in Pap1 as the degron for this important E3 ligase. The isolated gene deletions increase only moderately the concentration of the transcription factor, but it is sufficient to enhance basal tolerance to stress, probably by disturbing the inactive stage of this signaling cascade.
- dc.description.sponsorship This work is supported by the Ministerio de Economía y Competitividad (Spain), PLAN E and FEDER (BFU2015-68350-P and PGC2018-093920 to E.H) and by Unidad de Excelencia María de Maeztu (MDM-2014-0370). The Oxidative Stress and Cell Cycle group is also supported by Generalitat de Catalunya (Spain) (2017-SGR-539). E. H. is recipient of an ICREA Academia Award (Generalitat de Catalunya, Spain).
- dc.format.mimetype application/pdf
- dc.identifier.citation Marte L, Boronat S, García-Santamarina S, Ayté J, Kitamura K, Hidalgo E. Identification of ubiquitin-proteasome system components affecting the degradation of the transcription factor Pap1. Redox Biol. 2020;28:101305. DOI: 10.1016/j.redox.2019.101305
- dc.identifier.doi http://dx.doi.org/10.1016/j.redox.2019.101305
- dc.identifier.issn 2213-2317
- dc.identifier.uri http://hdl.handle.net/10230/42400
- dc.language.iso eng
- dc.publisher Elsevier
- dc.relation.ispartof Redox Biology. 2020;28:101305
- dc.relation.projectID info:eu-repo/grantAgreement/ES/1PE/BFU2015-68350-P
- dc.relation.projectID info:eu-repo/grantAgreement/ES/2PE/PGC2018-093920
- dc.rights © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/BY-NC-ND/4.0/).
- dc.rights.accessRights info:eu-repo/semantics/openAccess
- dc.rights.uri http://creativecommons.org/licenses/BY-NC-ND/4.0/
- dc.subject.keyword E3 ubiquitin ligase
- dc.subject.keyword H(2)O(2) tolerance
- dc.subject.keyword Multidrug resistance
- dc.subject.keyword Pap1
- dc.subject.keyword Proteasome
- dc.subject.keyword Ubr1
- dc.title Identification of ubiquitin-proteasome system components affecting the degradation of the transcription factor Pap1
- dc.type info:eu-repo/semantics/article
- dc.type.version info:eu-repo/semantics/publishedVersion