Yeast Rpn4 Links the Proteasome and DNA Repair Via Regulation

Overview

Journal Int J Mol Sci

Publisher MDPI

Specialties Biochemistry
Chemistry
Molecular Biology

Date 2020 Nov 4

PMID 33143019

Citations 4

Authors

Daria S Spasskaya

Nonna I Nadolinskaia

Vera V Tutyaeva

Yuriy P Lysov

Vadim L Karpov

Dmitry S Karpov

Affiliations

Soon will be listed here.

Abstract

Environmental and intracellular factors often damage DNA, but multiple DNA repair pathways maintain genome integrity. In yeast, the 26S proteasome and its transcriptional regulator and substrate Rpn4 are involved in DNA damage resistance. Paradoxically, while proteasome dysfunction may induce hyper-resistance to DNA-damaging agents, Rpn4 malfunction sensitizes yeasts to these agents. Previously, we proposed that proteasome inhibition causes Rpn4 stabilization followed by the upregulation of Rpn4-dependent DNA repair genes and pathways. Here, we aimed to elucidate the key Rpn4 targets responsible for DNA damage hyper-resistance in proteasome mutants. We impaired the Rpn4-mediated regulation of candidate genes using the CRISPR/Cas9 system and tested the sensitivity of mutant strains to 4-NQO, MMS and zeocin. We found that the separate or simultaneous deregulation of 19S or 20S proteasome subcomplexes induced , , and in an Rpn4-dependent manner. Deregulation of , and sensitized yeast to DNA damage. Genetic, epigenetic or dihydrocoumarin-mediated repression restored the sensitivity of the proteasome mutants to DNA damage. Our results suggest that the Rpn4-mediated overexpression of DNA repair genes, especially , defines the DNA damage hyper-resistant phenotype of proteasome mutants. The developed yeast model is useful for characterizing drugs that reverse the DNA damage hyper-resistance phenotypes of cancers.

Citing Articles

Synergistic Effect of a Combination of Proteasome and Ribonucleotide Reductase Inhibitors in a Biochemical Model of the Yeast and a Glioblastoma Cell Line.

Kulagin K, Starodubova E, Osipova P, Lipatova A, Cherdantsev I, Poddubko S Int J Mol Sci. 2024; 25(7).

PMID: 38612788 PMC: 11011839. DOI: 10.3390/ijms25073977.

Yeast Ribonucleotide Reductase Is a Direct Target of the Proteasome and Provides Hyper Resistance to the Carcinogen 4-NQO.

Spasskaya D, Kulagin K, Grineva E, Osipova P, Poddubko S, Bubis J J Fungi (Basel). 2023; 9(3).

PMID: 36983519 PMC: 10057556. DOI: 10.3390/jof9030351.

Tissue-specific DamID protocol using nanopore sequencing.

Gomez-Saldivar G, Glauser D, Meister P J Biol Methods. 2021; 8(3):e152.

PMID: 34514013 PMC: 8411031. DOI: 10.14440/jbm.2021.362.

DNA damage and regulation of protein homeostasis.

Paull T DNA Repair (Amst). 2021; 105:103155.

PMID: 34116476 PMC: 8364502. DOI: 10.1016/j.dnarep.2021.103155.

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