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Koletti A, Skliros D, Kalloniati C, Marka S, Zografaki ME, Infante C, Mantecón L, Flemetakis E. Global omics study of Tetraselmis chuii reveals time-related metabolic adaptations upon oxidative stress. Appl Microbiol Biotechnol 2024; 108:138. [PMID: 38229403 DOI: 10.1007/s00253-023-12936-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 11/26/2023] [Accepted: 12/01/2023] [Indexed: 01/18/2024]
Abstract
Microalgae species encounter oxidative stress in their natural environments, prompting the development of species-specific adaptation mechanisms. Understanding these mechanisms can offer valuable insights for biotechnological applications in microalgal metabolic manipulation. In this study, we investigated the response of Tetraselmis chuii, an industrially important microalga, to H2O2-induced oxidative stress. Exposure to 0.5-mM H2O2 resulted in reduced cell viability, and higher concentrations led to a drastic decline. After 1 h of exposure to H2O2, photosynthetic capacity (Qy) was negatively impacted, and this reduction intensified after 6 h of continuous stress. Global multi-omics analysis revealed that T. chuii rapidly responded to H2O2-induced oxidative stress within the first hour, causing significant changes in both transcriptomic and metabolomic profiles. Among the cellular functions negatively affected were carbon and energy flow, with photosynthesis-related PSBQ having a 2.4-fold downregulation, pyruvate kinase decreased by 1.5-fold, and urea content reduced by threefold. Prolonged exposure to H2O2 incurred a high energy cost, leading to unsuccessful attempts to enhance carbon metabolism, as depicted, for example, by the upregulation of photosystems-related PETC and PETJ by more than twofold. These findings indicate that T. chuii quickly responds to oxidative stress, but extended exposure can have detrimental effects on its cellular functions. KEY POINTS: • 0.5-mM H2O2-induced oxidative stress strongly affects T. chuii • Distinct short- and long-term adaptation mechanisms are induced • Major metabolic adaptations occur within the first hour of exposure.
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Affiliation(s)
- Aikaterini Koletti
- Department of Biotechnology, School of Applied Biology and Biotechnology, Agricultural University of Athens, 11855, Athens, Greece
| | - Dimitrios Skliros
- Department of Biotechnology, School of Applied Biology and Biotechnology, Agricultural University of Athens, 11855, Athens, Greece
| | - Chrysanthi Kalloniati
- Department of Marine Sciences, University of the Aegean, University Hill 81100, Mytilene, Greece
| | - Sofia Marka
- Department of Biotechnology, School of Applied Biology and Biotechnology, Agricultural University of Athens, 11855, Athens, Greece
| | - Maria-Eleftheria Zografaki
- Department of Biotechnology, School of Applied Biology and Biotechnology, Agricultural University of Athens, 11855, Athens, Greece
| | - Carlos Infante
- Fitoplancton Marino, S.L., Dársena Comercial S/N (Muelle Pesquero), 11500, El Puerto de Santa María (Cádiz), Spain
| | - Lalia Mantecón
- Fitoplancton Marino, S.L., Dársena Comercial S/N (Muelle Pesquero), 11500, El Puerto de Santa María (Cádiz), Spain
| | - Emmanouil Flemetakis
- Department of Biotechnology, School of Applied Biology and Biotechnology, Agricultural University of Athens, 11855, Athens, Greece.
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Park K, Kwak IS. Growth retardation and suppression of ubiquitin-dependent catabolic processes in the brackish water clam Corbicula japonica in response to salinity changes and bioaccumulation of toxic heavy metals. Environ Pollut 2023; 337:122554. [PMID: 37717895 DOI: 10.1016/j.envpol.2023.122554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 09/07/2023] [Accepted: 09/12/2023] [Indexed: 09/19/2023]
Abstract
The brackish water clam (Corbicula japonica) is constantly exposed to stressful salinity gradients and high levels of heavy metals in the freshwater-saltwater interface of estuary environments, which are introduced from upstream regions and land. To identify the key molecular pathways involved in the response to salinity changes and heavy metal bioaccumulation, we obtained the transcriptomes of C. japonica inhabiting different salinities and heavy metal distributions in Gwangyang Bay (Korea) using RNA sequencing. Among a total of 404,486 assembled unigenes, 5534 differentially expressed genes were identified in C. japonica inhabiting different conditions, 1549 of which were significantly upregulated and 1355 were significantly downregulated. Correlation analyses revealed distinct gene expression patterns between the low and high conditions of salinity and heavy metal bioaccumulation. Functional annotation revealed significant downregulation of genes involved in "ubiquitin-dependent protein catabolic process," "tricarboxylic acid cycle," and "intracellular protein transport" in C. japonica from the high condition compared to the low condition. Transcription and translation pathways were significantly enriched in the high condition. Additionally, upon comparison of the low and high conditions by qRT-PCR and proteasome enzyme activity analyses, our findings demonstrated that environmental stress could suppress the ubiquitin-proteasome complex (UPC). Additionally, transcriptomic changes under high salinity stress conditions may be related to an increase in cellular protection by defense enzymes, which leads to more energy being required and a disruption of energy homeostasis. Ultimately, this could cause growth retardation in the clam C. japonica. In summary, this study provides the first evidence of UPC suppression induced by a combination of high salinity and heavy metal bioaccumulation stress in C. japonica, which could compromise the survival and growth of estuarine bivalves.
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Affiliation(s)
- Kiyun Park
- Fisheries Science Institute, Chonnam National University, Yeosu, 59626, South Korea
| | - Ihn-Sil Kwak
- Fisheries Science Institute, Chonnam National University, Yeosu, 59626, South Korea; Department of Ocean Integrated Science, Chonnam National University, Yeosu 59626, South Korea.
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Zhang B, Tang Y, Yu F, Peng Z, Yao S, Deng X, Long H, Wang X, Huang K. Translatomics and physiological analyses of the detoxification mechanism of green alga Chlamydomonas reinhardtii to cadmium toxicity. J Hazard Mater 2023; 448:130990. [PMID: 36860060 DOI: 10.1016/j.jhazmat.2023.130990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 02/02/2023] [Accepted: 02/09/2023] [Indexed: 06/18/2023]
Abstract
Cadmium (Cd) is one of the most toxic pollutants found in aquatic ecosystems. Although gene expression in algae exposed to Cd has been studied at the transcriptional level, little is known about Cd impacts at the translational level. Ribosome profiling is a novel translatomics method that can directly monitor RNA translation in vivo. Here, we analyzed the translatome of the green alga Chlamydomonas reinhardtii following treatment with Cd to identify the cellular and physiological responses to Cd stress. Interestingly, we found that the cell morphology and cell wall structure were altered, and starch and high-electron-density particles accumulated in the cytoplasm. Several ATP-binding cassette transporters that responded to Cd exposure were identified. Redox homeostasis was adjusted to adapt to Cd toxicity, and GDP-L-galactose phosphorylase (VTC2), glutathione peroxidase (GPX5), and ascorbate were found to play important roles in maintaining reactive oxygen species homeostasis. Moreover, we found that the key enzyme of flavonoid metabolism, i.e., hydroxyisoflavone reductase (IFR1), is also involved in the detoxification of Cd. Thus, in this study, translatome and physiological analyses provided a complete picture of the molecular mechanisms of green algae cell responses to Cd.
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Affiliation(s)
- Baolong Zhang
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei, China
| | - Yuxin Tang
- School of Urban Construction, Wuhan University of Science and Technology, Wuhan 430065, Hubei, China
| | - Fei Yu
- School of Urban Construction, Wuhan University of Science and Technology, Wuhan 430065, Hubei, China
| | - Zhao Peng
- School of Life Sciences and Hubei Key Laboratory of Genetic Regulation and Integrative Biology, Central China Normal University, Wuhan 430079, Hubei, China
| | - Sheng Yao
- School of Life Sciences and Hubei Key Laboratory of Genetic Regulation and Integrative Biology, Central China Normal University, Wuhan 430079, Hubei, China
| | - Xuan Deng
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei, China
| | - Huan Long
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei, China
| | - Xun Wang
- School of Urban Construction, Wuhan University of Science and Technology, Wuhan 430065, Hubei, China
| | - Kaiyao Huang
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei, China.
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Dervisi I, Valassakis C, Koletti A, Kouvelis VN, Flemetakis E, Ouzounis CA, Roussis A. Evolutionary Aspects of Selenium Binding Protein (SBP). J Mol Evol 2023:10.1007/s00239-023-10105-4. [PMID: 37039856 DOI: 10.1007/s00239-023-10105-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Accepted: 03/21/2023] [Indexed: 04/12/2023]
Abstract
Selenium-binding proteins represent a ubiquitous protein family and recently SBP1 was described as a new stress response regulator in plants. SBP1 has been characterized as a methanethiol oxidase, however its exact role remains unclear. Moreover, in mammals, it is involved in the regulation of anti-carcinogenic growth and progression as well as reduction/oxidation modulation and detoxification. In this work, we delineate the functional potential of certain motifs of SBP in the context of evolutionary relationships. The phylogenetic profiling approach revealed the absence of SBP in the fungi phylum as well as in most non eukaryotic organisms. The phylogenetic tree also indicates the differentiation and evolution of characteristic SBP motifs. Main evolutionary events concern the CSSC motif for which Acidobacteria, Fungi and Archaea carry modifications. Moreover, the CC motif is harbored by some bacteria and remains conserved in Plants, while modified to CxxC in Animals. Thus, the characteristic sequence motifs of SBPs mainly appeared in Archaea and Bacteria and retained in Animals and Plants. Our results demonstrate the emergence of SBP from bacteria and most likely as a methanethiol oxidase.
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Affiliation(s)
- Irene Dervisi
- Section of Botany, Department of Biology, National & Kapodistrian University of Athens, 15784, Athens, Greece
| | - Chrysanthi Valassakis
- Section of Botany, Department of Biology, National & Kapodistrian University of Athens, 15784, Athens, Greece
| | - Aikaterini Koletti
- Department of Biotechnology, School of Applied Biology and Biotechnology, Agricultural University of Athens, 11855, Athens, Greece
| | - Vassilis N Kouvelis
- Section of Genetics and Biotechnology, Department of Biology, National & Kapodistrian University of Athens, 15784, Athens, Greece
| | - Emmanouil Flemetakis
- Department of Biotechnology, School of Applied Biology and Biotechnology, Agricultural University of Athens, 11855, Athens, Greece
| | - Christos A Ouzounis
- Biological Computation & Process Laboratory, Centre for Research & Technology Hellas, Chemical Process & Energy Resources Institute, 54124, Thessaloníki, Greece
- Biological Computation & Computational Biology Group, AIIA Lab, School of Informatics, Aristotle University of Thessalonica, 57001, Thessaloníki, Greece
| | - Andreas Roussis
- Section of Botany, Department of Biology, National & Kapodistrian University of Athens, 15784, Athens, Greece.
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Dervisi I, Petropoulos O, Agalou A, Podia V, Papandreou N, Iconomidou VA, Haralampidis K, Roussis A. The SAH7 Homologue of the Allergen Ole e 1 Interacts with the Putative Stress Sensor SBP1 (Selenium-Binding Protein 1) in Arabidopsis thaliana. Int J Mol Sci 2023; 24:3580. [PMID: 36834990 PMCID: PMC9962204 DOI: 10.3390/ijms24043580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 02/02/2023] [Accepted: 02/06/2023] [Indexed: 02/12/2023] Open
Abstract
In this study, we focused on a member of the Ole e 1 domain-containing family, AtSAH7, in Arabidopsis thaliana. Our lab reports for the first time on this protein, AtSAH7, that was found to interact with Selenium-binding protein 1 (AtSBP1). We studied by GUS assisted promoter deletion analysis the expression pattern of AtSAH7 and determined that the sequence 1420 bp upstream of the transcription start can act as a minimal promoter inducing expression in vasculature tissues. Moreover, mRNA levels of AtSAH7 were acutely increased under selenite treatment in response to oxidative stress. We confirmed the aforementioned interaction in vivo, in silico and in planta. Following a bimolecular fluorescent complementation approach, we determined that the subcellular localization of the AtSAH7 and the AtSAH7/AtSBP1 interaction occur in the ER. Our results indicate the participation of AtSAH7 in a biochemical network regulated by selenite, possibly associated with responses to ROS production.
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Affiliation(s)
- Irene Dervisi
- Department of Botany, Faculty of Biology, National and Kapodistrian University of Athens, 15784 Athens, Greece
| | - Orfeas Petropoulos
- Department of Botany, Faculty of Biology, National and Kapodistrian University of Athens, 15784 Athens, Greece
| | - Adamantia Agalou
- Laboratory of Toxicological Control of Pesticides, Scientific Directorate of Pesticides’ Control & Phytopharmacy, Benaki Phytopathological Institute (BPI), 8 Stefanou Delta Street, Kifissia, 14561 Athens, Greece
| | - Varvara Podia
- Department of Botany, Faculty of Biology, National and Kapodistrian University of Athens, 15784 Athens, Greece
| | - Nikolaos Papandreou
- Department of Cell Biology and Biophysics, Faculty of Biology, National and Kapodistrian University of Athens, 15784 Athens, Greece
| | - Vassiliki A. Iconomidou
- Department of Cell Biology and Biophysics, Faculty of Biology, National and Kapodistrian University of Athens, 15784 Athens, Greece
| | - Kosmas Haralampidis
- Department of Botany, Faculty of Biology, National and Kapodistrian University of Athens, 15784 Athens, Greece
| | - Andreas Roussis
- Department of Botany, Faculty of Biology, National and Kapodistrian University of Athens, 15784 Athens, Greece
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