Role of the Polymerase ϵ sub-unit DPB2 in DNA replication, cell cycle regulation and DNA damage response in Arabidopsis
Faithful DNA replication maintains genome stability in dividing cells and from one generation to the next. This is particularly important in plants because the whole plant body and reproductive cells originate from meristematic cells that retain their proliferative capacity throughout the life cycle of the organism. DNA replication involves large sets of proteins whose activity is strictly regulated, and is tightly linked to the DNA damage response to detect and respond to replication errors or defects. Central to this interconnection is the replicative polymerase DNA Polymerase ϵ (Pol ϵ) which participates in DNA replication per se, as well as replication stress response in animals and in yeast. Surprisingly, its function has to date been little explored in plants, and notably its relationship with DNA Damage Response (DDR) has not been investigated. Here, we have studied the role of the largest regulatory sub-unit of Arabidopsis DNA Pol ϵ DPB2, using an over-expression strategy. We demonstrate that excess accumulation of the protein impairs DNA replication and causes endogenous DNA stress. Furthermore, we show that Pol ϵ dysfunction has contrasting outcomes in vegetative and reproductive cells and leads to the activation of distinct DDR pathways in the two cell types. © 2016 The Author(s) 2016. Published by Oxford University Press on behalf of Nucleic Acids Research.
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2016
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dig-inia-es-10261-2905362023-02-17T12:26:42Z Role of the Polymerase ϵ sub-unit DPB2 in DNA replication, cell cycle regulation and DNA damage response in Arabidopsis Pedroza-Garcia, J. A. Domenichini, S. Mazubert, C. Bourge, M. White, C. Hudik, E. Bounon, R. Tariq, Z. Delannoy, E. del Olmo, I. Piñeiro Galvin, Manuel Ángel Jarillo Quiroga, José Antonio Bergounioux, C. Benhamed, M. Raynaud, C. Faithful DNA replication maintains genome stability in dividing cells and from one generation to the next. This is particularly important in plants because the whole plant body and reproductive cells originate from meristematic cells that retain their proliferative capacity throughout the life cycle of the organism. DNA replication involves large sets of proteins whose activity is strictly regulated, and is tightly linked to the DNA damage response to detect and respond to replication errors or defects. Central to this interconnection is the replicative polymerase DNA Polymerase ϵ (Pol ϵ) which participates in DNA replication per se, as well as replication stress response in animals and in yeast. Surprisingly, its function has to date been little explored in plants, and notably its relationship with DNA Damage Response (DDR) has not been investigated. Here, we have studied the role of the largest regulatory sub-unit of Arabidopsis DNA Pol ϵ DPB2, using an over-expression strategy. We demonstrate that excess accumulation of the protein impairs DNA replication and causes endogenous DNA stress. Furthermore, we show that Pol ϵ dysfunction has contrasting outcomes in vegetative and reproductive cells and leads to the activation of distinct DDR pathways in the two cell types. © 2016 The Author(s) 2016. Published by Oxford University Press on behalf of Nucleic Acids Research. 2023-02-17T12:26:42Z 2023-02-17T12:26:42Z 2016 artículo Nucleic Acids Research 44 (15): 7251-7266 (2016) 0305-1048 http://hdl.handle.net/20.500.12792/3361 http://hdl.handle.net/10261/290536 10.1093/nar/gkw449 1362-4962 en open Oxford University Press |
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Faithful DNA replication maintains genome stability in dividing cells and from one generation to the next. This is particularly important in plants because the whole plant body and reproductive cells originate from meristematic cells that retain their proliferative capacity throughout the life cycle of the organism. DNA replication involves large sets of proteins whose activity is strictly regulated, and is tightly linked to the DNA damage response to detect and respond to replication errors or defects. Central to this interconnection is the replicative polymerase DNA Polymerase ϵ (Pol ϵ) which participates in DNA replication per se, as well as replication stress response in animals and in yeast. Surprisingly, its function has to date been little explored in plants, and notably its relationship with DNA Damage Response (DDR) has not been investigated. Here, we have studied the role of the largest regulatory sub-unit of Arabidopsis DNA Pol ϵ DPB2, using an over-expression strategy. We demonstrate that excess accumulation of the protein impairs DNA replication and causes endogenous DNA stress. Furthermore, we show that Pol ϵ dysfunction has contrasting outcomes in vegetative and reproductive cells and leads to the activation of distinct DDR pathways in the two cell types. © 2016 The Author(s) 2016. Published by Oxford University Press on behalf of Nucleic Acids Research. |
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author |
Pedroza-Garcia, J. A. Domenichini, S. Mazubert, C. Bourge, M. White, C. Hudik, E. Bounon, R. Tariq, Z. Delannoy, E. del Olmo, I. Piñeiro Galvin, Manuel Ángel Jarillo Quiroga, José Antonio Bergounioux, C. Benhamed, M. Raynaud, C. |
spellingShingle |
Pedroza-Garcia, J. A. Domenichini, S. Mazubert, C. Bourge, M. White, C. Hudik, E. Bounon, R. Tariq, Z. Delannoy, E. del Olmo, I. Piñeiro Galvin, Manuel Ángel Jarillo Quiroga, José Antonio Bergounioux, C. Benhamed, M. Raynaud, C. Role of the Polymerase ϵ sub-unit DPB2 in DNA replication, cell cycle regulation and DNA damage response in Arabidopsis |
author_facet |
Pedroza-Garcia, J. A. Domenichini, S. Mazubert, C. Bourge, M. White, C. Hudik, E. Bounon, R. Tariq, Z. Delannoy, E. del Olmo, I. Piñeiro Galvin, Manuel Ángel Jarillo Quiroga, José Antonio Bergounioux, C. Benhamed, M. Raynaud, C. |
author_sort |
Pedroza-Garcia, J. A. |
title |
Role of the Polymerase ϵ sub-unit DPB2 in DNA replication, cell cycle regulation and DNA damage response in Arabidopsis |
title_short |
Role of the Polymerase ϵ sub-unit DPB2 in DNA replication, cell cycle regulation and DNA damage response in Arabidopsis |
title_full |
Role of the Polymerase ϵ sub-unit DPB2 in DNA replication, cell cycle regulation and DNA damage response in Arabidopsis |
title_fullStr |
Role of the Polymerase ϵ sub-unit DPB2 in DNA replication, cell cycle regulation and DNA damage response in Arabidopsis |
title_full_unstemmed |
Role of the Polymerase ϵ sub-unit DPB2 in DNA replication, cell cycle regulation and DNA damage response in Arabidopsis |
title_sort |
role of the polymerase ϵ sub-unit dpb2 in dna replication, cell cycle regulation and dna damage response in arabidopsis |
publisher |
Oxford University Press |
publishDate |
2016 |
url |
http://hdl.handle.net/20.500.12792/3361 http://hdl.handle.net/10261/290536 |
work_keys_str_mv |
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