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Castro PH, Couto D, Santos MÂ, Freitas S, Lourenço T, Dias E, Huguet S, Marques da Silva J, Tavares RM, Bejarano ER, Azevedo H. SUMO E3 ligase SIZ1 connects sumoylation and reactive oxygen species homeostasis processes in Arabidopsis. Plant Physiol 2022; 189:934-954. [PMID: 35238389 PMCID: PMC9157161 DOI: 10.1093/plphys/kiac085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Accepted: 01/26/2022] [Indexed: 06/14/2023]
Abstract
The ubiquitin-like modifying peptide SMALL UBIQUITIN-LIKE MODIFIER (SUMO) has become a known modulator of the plant response to multiple environmental stimuli. A common feature of many of these external stresses is the production of reactive oxygen species (ROS). Taking into account that SUMO conjugates rapidly accumulate in response to an external oxidative stimulus, it is likely that ROS and sumoylation converge at the molecular and regulatory levels. In this study, we explored the SUMO-ROS relationship, using as a model the Arabidopsis (Arabidopsis thaliana) null mutant of the major SUMO-conjugation enhancer, the E3 ligase SAP AND MIZ 1 (SIZ1). We showed that SIZ1 is involved in SUMO conjugate increase when primed with both exogenous and endogenous ROS. In siz1, seedlings were sensitive to oxidative stress imposition, and mutants accumulated different ROS throughout development. We demonstrated that the deregulation in hydrogen peroxide and superoxide homeostasis, but not of singlet O2 (1O2), was partially due to SA accumulation in siz1. Furthermore, transcriptomic analysis highlighted a transcriptional signature that implicated siz1 with 1O2 homeostasis. Subsequently, we observed that siz1 displayed chloroplast morphological defects and altered energy dissipation activity and established a link between the chlorophyll precursor protochlorophyllide and deregulation of PROTOCHLOROPHYLLIDE OXIDOREDUCTASE A (PORA), which is known to drive overproduction of 1O2. Ultimately, network analysis uncovered known and additional associations between transcriptional control of PORA and SIZ1-dependent sumoylation. Our study connects sumoylation, and specifically SIZ1, to the control of chloroplast functions and places sumoylation as a molecular mechanism involved in ROS homeostatic and signaling events.
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Affiliation(s)
- Pedro Humberto Castro
- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, Campus de Vairão, Universidade do Porto, Vairão 4485-661, Portugal
- BIOPOLIS Program in Genomics, Biodiversity and Land Planning, CIBIO, Vairão 4485-661, Portugal
- Biosystems & Integrative Sciences Institute (BioISI), Plant Functional Biology Center, University of Minho, Braga 4710-057, Portugal
| | - Daniel Couto
- Biosystems & Integrative Sciences Institute (BioISI), Plant Functional Biology Center, University of Minho, Braga 4710-057, Portugal
| | - Miguel Ângelo Santos
- Biosystems & Integrative Sciences Institute (BioISI), Plant Functional Biology Center, University of Minho, Braga 4710-057, Portugal
| | - Sara Freitas
- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, Campus de Vairão, Universidade do Porto, Vairão 4485-661, Portugal
- BIOPOLIS Program in Genomics, Biodiversity and Land Planning, CIBIO, Vairão 4485-661, Portugal
- Biosystems & Integrative Sciences Institute (BioISI), Plant Functional Biology Center, University of Minho, Braga 4710-057, Portugal
| | - Tiago Lourenço
- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, Campus de Vairão, Universidade do Porto, Vairão 4485-661, Portugal
- BIOPOLIS Program in Genomics, Biodiversity and Land Planning, CIBIO, Vairão 4485-661, Portugal
- Biosystems & Integrative Sciences Institute (BioISI), Plant Functional Biology Center, University of Minho, Braga 4710-057, Portugal
| | - Eva Dias
- Biosystems & Integrative Sciences Institute (BioISI), Plant Functional Biology Center, University of Minho, Braga 4710-057, Portugal
| | - Stéphanie Huguet
- Université Paris-Saclay, CNRS, INRAE, Univ Evry, Institute of Plant Sciences Paris-Saclay (IPS2), Orsay 91405, France
- Université de Paris, CNRS, INRAE, Institute of Plant Sciences Paris-Saclay (IPS2), Orsay 91405, France
| | - Jorge Marques da Silva
- Biosystems and Integrative Sciences Institute (BioISI) and Departamento de Biologia Vegetal, Faculdade de Ciências, Universidade de Lisboa, Lisboa 1749-016, Portugal
| | - Rui Manuel Tavares
- Biosystems & Integrative Sciences Institute (BioISI), Plant Functional Biology Center, University of Minho, Braga 4710-057, Portugal
| | - Eduardo Rodríguez Bejarano
- Instituto de Hortofruticultura Subtropical y Mediterránea “La Mayora”, Universidad de Málaga-Consejo Superior de Investigaciones Científicas (IHSM-UMA-CSIC), Department of Biología Celular, Genética y Fisiología, Universidad de Málaga, Málaga 29071, Spain
| | - Herlander Azevedo
- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, Campus de Vairão, Universidade do Porto, Vairão 4485-661, Portugal
- BIOPOLIS Program in Genomics, Biodiversity and Land Planning, CIBIO, Vairão 4485-661, Portugal
- Departamento de Biologia, Faculdade de Ciências, Universidade do Porto, Porto 4099-002, Portugal
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