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Philipp TM, Gernoth L, Will A, Schwarz M, Ohse VA, Kipp AP, Steinbrenner H, Klotz LO. Selenium-binding protein 1 (SELENBP1) is a copper-dependent thiol oxidase. Redox Biol 2023; 65:102807. [PMID: 37437449 PMCID: PMC10362175 DOI: 10.1016/j.redox.2023.102807] [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: 05/04/2023] [Revised: 06/17/2023] [Accepted: 07/02/2023] [Indexed: 07/14/2023] Open
Abstract
Selenium-binding protein 1 (SELENBP1) was reported to act as a methanethiol oxidase (MTO) in humans, catalyzing the conversion of methanethiol to hydrogen peroxide, hydrogen sulfide and formaldehyde. Here, we identify copper ions as essential to this novel MTO activity. Site-directed mutagenesis of putative copper-binding sites in human SELENBP1 produced as recombinant protein in E. coli resulted in loss of its enzymatic function. On the other hand, the eponymous binding of selenium (as selenite) was no requirement for MTO activity and only moderately increased SELENBP1-catalyzed oxidation of methanethiol. Furthermore, SEMO-1, the SELENBP1 ortholog recently identified in the nematode C. elegans, also requires copper ions, and MTO activity was enhanced or abrogated, respectively, if worms were grown in the presence of cupric chloride or of a Cu chelator. In addition to methanethiol, we identified novel substrates of SELENBP1 from the group of volatile sulfur compounds, ranging from ethanethiol to 1-pentanethiol as well as 2-propene-1-thiol. Gut microbiome-derived methanethiol as well as food-derived volatile sulfur compounds (VSCs) account for malodors that may contribute to extraoral halitosis in humans, if not metabolized properly. As SELENBP1 is particularly abundant in tissues exposed to VSCs, such as colon, liver, and lung, it appears to contribute to copper-dependent VSC degradation.
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Affiliation(s)
- Thilo Magnus Philipp
- Institute of Nutritional Sciences, Nutrigenomics Section, Friedrich Schiller University Jena, Jena, Germany
| | - Leon Gernoth
- Institute of Nutritional Sciences, Nutrigenomics Section, Friedrich Schiller University Jena, Jena, Germany
| | - Andreas Will
- Institute of Nutritional Sciences, Nutrigenomics Section, Friedrich Schiller University Jena, Jena, Germany
| | - Maria Schwarz
- Institute of Nutritional Sciences, Department of Nutritional Physiology, Friedrich Schiller University Jena, Jena, Germany
| | - Verena Alexia Ohse
- Institute of Nutritional Sciences, Nutrigenomics Section, Friedrich Schiller University Jena, Jena, Germany
| | - Anna Patricia Kipp
- Institute of Nutritional Sciences, Department of Nutritional Physiology, Friedrich Schiller University Jena, Jena, Germany
| | - Holger Steinbrenner
- Institute of Nutritional Sciences, Nutrigenomics Section, Friedrich Schiller University Jena, Jena, Germany
| | - Lars-Oliver Klotz
- Institute of Nutritional Sciences, Nutrigenomics Section, Friedrich Schiller University Jena, Jena, Germany.
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Withdrawal Notice. Cancer Med 2022; 12:19353. [PMID: 36372952 DOI: 10.1002/cam4.5306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Indexed: 11/16/2022] Open
Abstract
Withdrawal Notice: Zhu, Y, Pu, Q, Zhang, Q, et al. Selenium-binding protein 1 inhibits malignant progression and induces apoptosis via distinct mechanisms in non-small-cell lung cancer. Cancer Med. 2022; 00: 1-22. doi: 10.1002/cam4.5306. The above article, published online on 13th November 2022 in Wiley Online Library (https://onlinelibrary.wiley.com/doi/10.1002/cam4.5306), has been withdrawn by agreement between the journal Editor in Chief, Dr Stephen Tait, the Authors, and John Wiley & Sons, Ltd. The withdrawal has been agreed due to an editorial office error that led to the publication of the article without peer review. The revised article, which has undergone peer review may be read here: https://onlinelibrary.wiley.com/doi/10.1002/cam4.6309.
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Zhu Y, Pu Q, Zhang Q, Liu Y, Ma Y, Yuan Y, Liu L, Zhu W. Selenium-binding protein 1 inhibits malignant progression and induces apoptosis via distinct mechanisms in non-small cell lung cancer. Cancer Med 2023; 12:17149-17170. [PMID: 37606338 PMCID: PMC10501285 DOI: 10.1002/cam4.6309] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 05/30/2023] [Accepted: 06/23/2023] [Indexed: 08/23/2023] Open
Abstract
BACKGROUND Selenium is an essential trace element in the human body. In epidemiological and clinical studies, Se supplementation significantly reduced the incidence of lung cancer in individuals with low baseline Se levels. The significant action of selenium is based on the selenium-containing protein as a mediator. Of note, the previous studies reported that the expression of selenium-binding protein 1 (SELENBP1) was obviously decreased in many human cancer tissues including non-small cell lung cancer (NSCLC). However, its roles in the origin and development of NSCLC are still unclear. METHODS The expression of SELENBP1 was measured by qRT-PCR, Western blotting and IHC in our collected clinical NSCLC tissues and cell lines. Next, the CCK-8, colony formation, wound-haeling, Millicell, Transwell, FCM assay, and in vivo xenograft model were performed to explore the function of SELENBP1 in NSCLC. The molecular mechanisms of SELENBP1 were investigated by Western blotting or IF assay. RESULTS We further identified that the expression of SELENBP1 was significantly decreased in NSCLC tissues in TCGA database and 45 out of 59 collected clinical NSCLC tissues compared with adjacent nontumor tissues, as well as in four NSCLC cell lines compared with normal lung cells. Particularly, we unexpectedly discovered that SELENBP1 was obviously expressed in alveolar type 2 (AT-II) cells for the first time. Then, a series of in vitro experiments uncovered that overexpression of SELENBP1 inhibited the proliferation, migration, and invasion of NSCLC cells, and induced cell apoptosis. Moreover, overexpression of SELENBP1 also inhibited growth and induced apoptosis of NSCLC cells in vivo. Mechanistically, we demonstrated that overexpression of SELENBP1 inhibited the malignant characteristics of NSCLC cells in part via inactivating the PI3K/AKT/mTOR signal pathway. Meanwhile, we found that overexpression of SELENBP1 inducing the apoptosis of NSCLC cells was associated with the activation of caspase-3 signaling pathway under nonhigh level of oxidative stress, but overexpression of SELENBP1 facilitating the cell apoptosis might be related to its combining with GPX1 and colocalizing in the nucleus under high level of oxidative stress. CONCLUSIONS Our findings highlighted that SELENBP1 was an important tumor suppressor during the origin and development of NSCLC. It may help to discover novel biomarkers or drug therapy targets for NSCLC.
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Affiliation(s)
- Ying Zhu
- State Key Laboratory of Biotherapy and Cancer CenterWest China Hospital, Sichuan UniversityChengduSichuanChina
| | - Qiang Pu
- Department of Thoracic SurgeryInstitute of Thoracic Oncology, West China Hospital, Sichuan UniversityChengduSichuanChina
| | - Qiongyin Zhang
- State Key Laboratory of Biotherapy and Cancer CenterWest China Hospital, Sichuan UniversityChengduSichuanChina
| | - Yang Liu
- State Key Laboratory of Biotherapy and Cancer CenterWest China Hospital, Sichuan UniversityChengduSichuanChina
| | - Yongfang Ma
- State Key Laboratory of Biotherapy and Cancer CenterWest China Hospital, Sichuan UniversityChengduSichuanChina
| | - Yue Yuan
- State Key Laboratory of Biotherapy and Cancer CenterWest China Hospital, Sichuan UniversityChengduSichuanChina
| | - Lunxu Liu
- Department of Thoracic SurgeryInstitute of Thoracic Oncology, West China Hospital, Sichuan UniversityChengduSichuanChina
| | - Wen Zhu
- State Key Laboratory of Biotherapy and Cancer CenterWest China Hospital, Sichuan UniversityChengduSichuanChina
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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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Luo F, Zhu D, Sun H, Zou R, Duan W, Liu J, Yan Y. Wheat Selenium-binding protein TaSBP-A enhances cadmium tolerance by decreasing free Cd 2+ and alleviating the oxidative damage and photosynthesis impairment. Front Plant Sci 2023; 14:1103241. [PMID: 36824198 PMCID: PMC9941557 DOI: 10.3389/fpls.2023.1103241] [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] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Accepted: 01/20/2023] [Indexed: 06/18/2023]
Abstract
Cadmium, one of the toxic heavy metals, robustly impact crop growth and development and food safety. In this study, the mechanisms of wheat (Triticum aestivum L.) selenium-binding protein-A (TaSBP-A) involved in response to Cd stress was fully investigated by overexpression in Arabidopsis and wheat. As a cytoplasm protein, TaSBP-A showed a high expression in plant roots and its expression levels were highly induced by Cd treatment. The overexpression of TaSBP-A enhanced Cd-toleration in yeast, Arabidopsis and wheat. Meanwhile, transgenic Arabidopsis under Cd stress showed a lower H2O2 and malondialdehyde content and a higher photochemical efficiency in the leaf and a reduction of free Cd2+ in the root. Transgenic wheat seedlings of TaSBP exhibited an increment of Cd content in the root, and a reduction Cd content in the leaf under Cd2+ stress. Cd2+ binding assay combined with a thermodynamics survey and secondary structure analysis indicated that the unique CXXC motif in TaSBP was a major Cd-binding site participating in the Cd detoxification. These results suggested that TaSBP-A can enhance the sequestration of free Cd2+ in root and inhibit the Cd transfer from root to leaf, ultimately conferring plant Cd-tolerance via alleviating the oxidative stress and photosynthesis impairment triggered by Cd stress.
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Affiliation(s)
| | | | | | | | | | | | - Yueming Yan
- Beijing Key Laboratory of Plant Gene Resources and Biotechnology for Carbon Reduction and Environmental Improvement, College of Life Science, Capital Normal University, Beijing, China
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Zhang Y, He Q. The role of SELENBP1 and its epigenetic regulation in carcinogenic progression. Front Genet 2022; 13:1027726. [PMID: 36386843 PMCID: PMC9663989 DOI: 10.3389/fgene.2022.1027726] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Accepted: 10/10/2022] [Indexed: 01/24/2023] Open
Abstract
The initiation and progression of cancer is modulated through diverse genetic and epigenetic modifications. The epigenetic machinery regulates gene expression through intertwined DNA methylation, histone modifications, and miRNAs without affecting their genome sequences. SELENBP1 belongs to selenium-binding proteins and functions as a tumor suppressor. Its expression is significantly downregulated and correlates with carcinogenic progression and poor survival in various cancers. The role of SELENBP1 in carcinogenesis has not been fully elucidated, and its epigenetic regulation remains poorly understood. In this review, we summarize recent findings on the function and regulatory mechanisms of SELENBP1 during carcinogenic progression, with an emphasis on epigenetic mechanisms. We also discuss the potential cancer treatment targeting epigenetic modification of SELENBP1, either alone or in combination with selenium-containing compounds or dietary selenium.
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Dervisi I, Haralampidis K, Roussis A. Investigation of the interaction of a papain-like cysteine protease (RD19c) with selenium-binding protein 1 (SBP1) in Arabidopsis thaliana. Plant Sci 2022; 315:111157. [PMID: 35067295 DOI: 10.1016/j.plantsci.2021.111157] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [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: 08/11/2021] [Revised: 12/10/2021] [Accepted: 12/13/2021] [Indexed: 06/14/2023]
Abstract
AtRD19c is a member of the papain-like cysteine proteases known for its participation in anther development after its maturation by βVPE (vacuolar processing enzyme). This papain-like cysteine protease was identified as an interacting protein of AtSBP1 (selenium binding protein 1) in a yeast two-hybrid screening. To confirm this interaction, we studied AtRD19c with respect to its expression and ability to interact with AtSBP1. The highest gene expression levels of AtRD19c were observed in the roots of 10-day-old seedlings, whereas minimum levels appeared in the hypocotyls of 10-day-old seedlings and flowers. AtRD19c expression was upregulated by selenium, and analysis of its promoter activity showed colocalization of a reporter gene (GUS) with AtSBP1. Additionally, the AtRD19c expression pattern was upregulated in the presence of selenite, indicating its participation in the Se response network. Confocal fluorescence microscopy revealed that AtRD19c localizes in the root tip, lateral roots, and leaf trichomes. Finally, we confirmed the physical interaction between AtRD19c and AtSBP1 and showed the importance of the first 175 aa of the AtSBP1 polypeptide in this interaction. Importantly, the AtRD19c-AtSBP1 interaction was also demonstrated in planta by employing bimolecular fluorescent complementation (BiFC) in a protoplast system.
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Affiliation(s)
- Irene Dervisi
- Department of Botany, Faculty of Biology, National & Kapodistrian University of Athens, 15784, Athens, Greece.
| | - Kosmas Haralampidis
- Department of Botany, Faculty of Biology, National & Kapodistrian University of Athens, 15784, Athens, Greece.
| | - Andreas Roussis
- Department of Botany, Faculty of Biology, National & Kapodistrian University of Athens, 15784, Athens, Greece.
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Ma X, Zhang B, Miao R, Deng X, Duan Y, Cheng Y, Zhang W, Shi M, Huang K, Xia XQ. Transcriptomic and Physiological Responses to Oxidative Stress in a Chlamydomonas reinhardtii Glutathione Peroxidase Mutant. Genes (Basel) 2020; 11:genes11040463. [PMID: 32344528 PMCID: PMC7230881 DOI: 10.3390/genes11040463] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 04/16/2020] [Accepted: 04/21/2020] [Indexed: 11/17/2022] Open
Abstract
Aerobic photosynthetic organisms such as algae produce reactive oxygen species (ROS) as by-products of metabolism. ROS damage biomolecules such as proteins and lipids in cells, but also act as signaling molecules. The mechanisms that maintain the metabolic balance in aerobic photosynthetic organisms and how the cells specifically respond to different levels of ROS are unclear. Glutathione peroxidase (GPX) enzymes detoxify hydrogen peroxide or organic hydroperoxides, and thus are important components of the antioxidant system. In this study, we employed a Chlamydomonas reinhardtii glutathione peroxidase knockout (gpx5) mutant to identify the genetic response to singlet oxygen (1O2) generated by the photosensitizer rose bengal (RB). To this end, we compared the transcriptomes of the parental strain CC4348 and the gpx5 mutant sampled before, and 1 h after, the addition of RB. Functional annotation of differentially expressed genes showed that genes encoding proteins related to ROS detoxification, stress-response-related molecular chaperones, and ubiquitin–proteasome pathway genes were upregulated in CC4338. When GPX5 was mutated, higher oxidative stress specifically induced the TCA cycle and enhanced mitochondrial electron transport. Transcription of selenoproteins and flagellar-associated proteins was depressed in CC4348 and the gpx5 mutant. In addition, we found iron homeostasis played an important role in maintaining redox homeostasis, and we uncovered the relationship between 1O2 stress and iron assimilation, as well as selenoproteins. Based on the observed expression profiles in response to different levels of oxidative stress, we propose a model for dose-dependent responses to different ROS levels in Chlamydomonas.
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Affiliation(s)
- Xiaocui Ma
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei, China; (X.M.); (B.Z.); (R.M.); (X.D.); (Y.D.); (Y.C.); (W.Z.); (M.S.)
- University of Chinese Academy of Sciences, Beijing 100039, China
| | - Baolong Zhang
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei, China; (X.M.); (B.Z.); (R.M.); (X.D.); (Y.D.); (Y.C.); (W.Z.); (M.S.)
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei, China
- University of Chinese Academy of Sciences, Beijing 100039, China
| | - Rongli Miao
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei, China; (X.M.); (B.Z.); (R.M.); (X.D.); (Y.D.); (Y.C.); (W.Z.); (M.S.)
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei, China
- University of Chinese Academy of Sciences, Beijing 100039, China
| | - Xuan Deng
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei, China; (X.M.); (B.Z.); (R.M.); (X.D.); (Y.D.); (Y.C.); (W.Z.); (M.S.)
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei, China
| | - You Duan
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei, China; (X.M.); (B.Z.); (R.M.); (X.D.); (Y.D.); (Y.C.); (W.Z.); (M.S.)
- University of Chinese Academy of Sciences, Beijing 100039, China
| | - Yingyin Cheng
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei, China; (X.M.); (B.Z.); (R.M.); (X.D.); (Y.D.); (Y.C.); (W.Z.); (M.S.)
| | - Wanting Zhang
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei, China; (X.M.); (B.Z.); (R.M.); (X.D.); (Y.D.); (Y.C.); (W.Z.); (M.S.)
| | - Mijuan Shi
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei, China; (X.M.); (B.Z.); (R.M.); (X.D.); (Y.D.); (Y.C.); (W.Z.); (M.S.)
| | - Kaiyao Huang
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei, China; (X.M.); (B.Z.); (R.M.); (X.D.); (Y.D.); (Y.C.); (W.Z.); (M.S.)
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei, China
- Correspondence: (K.H.); (X.-Q.X.)
| | - Xiao-Qin Xia
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei, China; (X.M.); (B.Z.); (R.M.); (X.D.); (Y.D.); (Y.C.); (W.Z.); (M.S.)
- University of Chinese Academy of Sciences, Beijing 100039, China
- Correspondence: (K.H.); (X.-Q.X.)
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9
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Dervisi I, Valassakis C, Agalou A, Papandreou N, Podia V, Haralampidis K, Iconomidou VA, Kouvelis VN, Spaink HP, Roussis A. Investigation of the interaction of DAD1-LIKE LIPASE 3 (DALL3) with Selenium Binding Protein 1 (SBP1) in Arabidopsis thaliana. Plant Sci 2020; 291:110357. [PMID: 31928671 DOI: 10.1016/j.plantsci.2019.110357] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [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: 06/26/2019] [Revised: 11/18/2019] [Accepted: 11/21/2019] [Indexed: 06/10/2023]
Abstract
Phospholipase PLA1-Iγ2 or otherwise DAD1-LIKE LIPASE 3 (DALL3) is a member of class I phospholipases and has a role in JA biosynthesis. AtDALL3 was previously identified in a yeast two-hybrid screening as an interacting protein of the Arabidopsis Selenium Binding Protein 1 (SBP1). In this work, we have studied AtDALL3 as an interacting partner of the Arabidopsis Selenium Binding Protein 1 (SBP1). Phylogenetic analysis showed that DALL3 appears in the PLA1-Igamma1, 2 group, paired with PLA1-Igammma1. The highest level of expression of AtDALL3 was observed in 10-day-old roots and in flowers, while constitutive levels were maintained in seedlings, cotyledons, shoots and leaves. In response to abiotic stress, DALL3 was shown to participate in the network of genes regulated by cadmium, selenite and selenate compounds. DALL3 promoter driven GUS assays revealed that the expression patterns defined were overlapping with the patterns reported for AtSBP1 gene, indicating that DALL3 and SBP1 transcripts co-localize. Furthermore, quantitative GUS assays showed that these compounds elicited changes in activity in specific cells files, indicating the differential response of DALL3 promoter. GFP::DALL3 studies by confocal microscopy demonstrated the localization of DALL3 in the plastids of the root apex, the plastids of the central root and the apex of emerging lateral root primordia. Additionally, we confirmed by yeast two hybrid assays the physical interaction of DALL3 with SBP1 and defined a minimal SBP1 fragment that DALL3 binds to. Finally, by employing bimolecular fluorescent complementation we demonstrated the in planta interaction of the two proteins.
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Affiliation(s)
- Irene Dervisi
- Department of Botany, Faculty of Biology, National & Kapodistrian University of Athens, 15784, Athens, Greece
| | - Chrysanthi Valassakis
- Department of Botany, Faculty of Biology, National & Kapodistrian University of Athens, 15784, Athens, Greece
| | - Adamantia Agalou
- Institute of Biology, Leiden University, Leiden, the Netherlands
| | - Nikolaos Papandreou
- Department of Cell Biology and Biophysics, Faculty of Biology, National & Kapodistrian University, 15784, Athens, Greece
| | - Varvara Podia
- Department of Botany, Faculty of Biology, National & Kapodistrian University of Athens, 15784, Athens, Greece
| | - Kosmas Haralampidis
- Department of Botany, Faculty of Biology, National & Kapodistrian University of Athens, 15784, Athens, Greece
| | - Vassiliki A Iconomidou
- Department of Cell Biology and Biophysics, Faculty of Biology, National & Kapodistrian University, 15784, Athens, Greece
| | - Vassili N Kouvelis
- Department of Genetics and Biotechnology, Faculty of Biology, National & Kapodistrian University of Athens, 15784, Athens, Greece
| | - Herman P Spaink
- Institute of Biology, Leiden University, Leiden, the Netherlands
| | - Andreas Roussis
- Department of Botany, Faculty of Biology, National & Kapodistrian University of Athens, 15784, Athens, Greece.
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Valassakis C, Dervisi I, Agalou A, Papandreou N, Kapetsis G, Podia V, Haralampidis K, Iconomidou VA, Spaink HP, Roussis A. Novel interactions of Selenium Binding Protein family with the PICOT containing proteins AtGRXS14 and AtGRXS16 in Arabidopsis thaliana. Plant Sci 2019; 281:102-112. [PMID: 30824043 DOI: 10.1016/j.plantsci.2019.01.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [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: 10/04/2018] [Revised: 01/21/2019] [Accepted: 01/22/2019] [Indexed: 06/09/2023]
Abstract
During abiotic stress the primary symptom of phytotoxicity can be ROS production which is strictly regulated by ROS scavenging pathways involving enzymatic and non-enzymatic antioxidants. Furthermore, ROS are well-described secondary messengers of cellular processes, while during the course of evolution, plants have accomplished high degree of control over ROS and used them as signalling molecules. Glutaredoxins (GRXs) are small and ubiquitous glutathione (GSH) -or thioredoxin reductase (TR)-dependent oxidoreductases belonging to the thioredoxin (TRX) superfamily which are conserved in most eukaryotes and prokaryotes. In Arabidopsis thaliana GRXs are subdivided into four classes playing a central role in oxidative stress responses and physiological functions. In this work, we describe a novel interaction of AtGRXS14 with the Selenium Binding Protein 1 (AtSBP1), a protein proposed to be integrated in a regulatory network that senses alterations in cellular redox state and acts towards its restoration. We further show that SBP protein family interacts with AtGRXS16 that also contains a PICOT domain, like AtGRXS14.
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Affiliation(s)
- Chrysanthi Valassakis
- Department of Botany, Faculty of Biology, National & Kapodistrian University of Athens, 15784, Athens, Greece
| | - Irene Dervisi
- Department of Botany, Faculty of Biology, National & Kapodistrian University of Athens, 15784, Athens, Greece
| | - Adamantia Agalou
- Institute of Biology, Leiden University, Leiden, the Netherlands
| | - Nikolaos Papandreou
- Department of Cell Biology and Biophysics, Faculty of Biology, National & Kapodistrian University, 15784, Athens, Greece
| | - Georgios Kapetsis
- Department of Botany, Faculty of Biology, National & Kapodistrian University of Athens, 15784, Athens, Greece
| | - Varvara Podia
- Department of Botany, Faculty of Biology, National & Kapodistrian University of Athens, 15784, Athens, Greece
| | - Kosmas Haralampidis
- Department of Botany, Faculty of Biology, National & Kapodistrian University of Athens, 15784, Athens, Greece
| | - Vassiliki A Iconomidou
- Department of Cell Biology and Biophysics, Faculty of Biology, National & Kapodistrian University, 15784, Athens, Greece
| | - Herman P Spaink
- Institute of Biology, Leiden University, Leiden, the Netherlands
| | - Andreas Roussis
- Department of Botany, Faculty of Biology, National & Kapodistrian University of Athens, 15784, Athens, Greece.
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Elhodaky M, Diamond AM. Selenium-Binding Protein 1 in Human Health and Disease. Int J Mol Sci 2018; 19:E3437. [PMID: 30400135 DOI: 10.3390/ijms19113437] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 10/05/2018] [Accepted: 10/31/2018] [Indexed: 12/19/2022] Open
Abstract
Selenium-binding protein 1 (SBP1) is a highly conserved protein that covalently binds selenium. SBP1 may play important roles in several fundamental physiological functions, including protein degradation, intra-Golgi transport, cell differentiation, cellular motility, redox modulation, and the metabolism of sulfur-containing molecules. SBP1 expression is often reduced in many cancer types compared to the corresponding normal tissues and low levels of SBP1 are frequently associated with poor clinical outcome. In this review, the transcriptional regulation of SBP1, the different physiological roles reported for SBP1, as well as the implications of SBP1 function in cancer and other diseases are presented.
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Phani V, Somvanshi VS, Rao U. Silencing of a Meloidogyne incognita selenium-binding protein alters the cuticular adhesion of Pasteuria penetrans endospores. Gene 2018; 677:289-298. [PMID: 30125659 DOI: 10.1016/j.gene.2018.08.058] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Revised: 07/30/2018] [Accepted: 08/16/2018] [Indexed: 11/30/2022]
Abstract
Pasteuria penetrans is an endospore forming hyperparasitic bacterium of the plant-pathogenic root-knot nematode, Meloidogyne incognita. For successful parasitization, the first step is adherence of bacterial endospores onto the cuticle surface of nematode juveniles. The knowledge of molecular intricacies involved during this adherence is sparse. Here, we identified a M. incognita selenium-binding protein (Mi-SeBP-1) differentially expressed during the initial interaction of M. incognita and P. penetrans, and show that it is involved in modulating parasitic adhesion of bacterial endospores onto nematode cuticle. Selenium-binding proteins (SeBPs) are selenium associated proteins important for growth regulation, tumor prevention and modulation of oxidation/reduction in cells. Although reported to be present in several nematodes, the function of SeBPs is not known in Phylum Nematoda. In situ hybridization assay localized the Mi-SeBP-1 mRNA to the hypodermal cells. RNAi-mediated silencing of Mi-SeBP-1 significantly increased the adherence of P. penetrans endospores to the nematode juvenile cuticle. Silencing of Mi-SeBP-1 did not change the nematode's ability to parasitize plants and reproduction potential within the host. These results suggest that M. incognita Mi-SeBP-1 might be involved in altering the attachment of microbial pathogens on the nematode cuticle, but is not involved in nematode-host plant interaction. This is the first report for a function of SeBP in Phylum Nematoda.
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Affiliation(s)
- Victor Phani
- Division of Nematology, ICAR-Indian Agricultural Research Institute, New Delhi, India
| | | | - Uma Rao
- Division of Nematology, ICAR-Indian Agricultural Research Institute, New Delhi, India.
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Valassakis C, Livanos P, Minopetrou M, Haralampidis K, Roussis A. Promoter analysis and functional implications of the selenium binding protein (SBP) gene family in Arabidopsis thaliana. J Plant Physiol 2018; 224-225:19-29. [PMID: 29574326 DOI: 10.1016/j.jplph.2018.03.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [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: 09/24/2017] [Revised: 03/09/2018] [Accepted: 03/12/2018] [Indexed: 05/23/2023]
Abstract
Selenium Βinding Protein (SBP, originally termed SBP56) was identified in mouse liver as a cytosolic protein that could bind radioactive selenium. SBPs are highly conserved proteins present in a wide array of species across all kingdoms and are likely to be involved in selenium metabolism. In Arabidopsis, the selenium binding protein (SBP) gene family comprises three genes (AtSBP1, AtSBP2 and AtSBP3). AtSBP1 and AtSBP2 are clustered in a head-to-tail arrangement on chromosome IV, while AtSBP3 is located on chromosome III. In this work, we studied the promoter activity of the Arabidopsis SBP genes, determined their tissue specificity and showed that they are differentially regulated by sodium selenite and sodium selenate. All three SBP genes are upregulated in response to externally applied selenium compounds and the antioxidant NAC selectively downregulates SBP2. Although the effect on SBP2 levels was the most prominent, in all cases, the concurrent exposure of plants to selenite and the antioxidant supressed the expression of the SBP genes. We provide evidence that (at least) SBP1 expression is tightly linked to detoxification processes related to oxidative stress, since it is downregulated in the presence of NAC in selenium-treated plants. Furthermore, our results suggest that SBP genes may participate in the mechanisms that sense redox imbalance.
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Affiliation(s)
- Chrysanthi Valassakis
- National and Kapodistrian University of Athens, Faculty of Biology, Department of Botany, 15784 Athens, Greece
| | - Pantelis Livanos
- National and Kapodistrian University of Athens, Faculty of Biology, Department of Botany, 15784 Athens, Greece
| | - Martha Minopetrou
- National and Kapodistrian University of Athens, Faculty of Biology, Department of Botany, 15784 Athens, Greece
| | - Kosmas Haralampidis
- National and Kapodistrian University of Athens, Faculty of Biology, Department of Botany, 15784 Athens, Greece
| | - Andreas Roussis
- National and Kapodistrian University of Athens, Faculty of Biology, Department of Botany, 15784 Athens, Greece.
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14
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Eyice Ö, Myronova N, Pol A, Carrión O, Todd JD, Smith TJ, Gurman SJ, Cuthbertson A, Mazard S, Mennink-Kersten MA, Bugg TD, Andersson KK, Johnston AW, Op den Camp HJ, Schäfer H. Bacterial SBP56 identified as a Cu-dependent methanethiol oxidase widely distributed in the biosphere. ISME J 2017; 12:145-160. [PMID: 29064480 PMCID: PMC5739008 DOI: 10.1038/ismej.2017.148] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/28/2017] [Revised: 06/07/2017] [Accepted: 07/27/2017] [Indexed: 12/05/2022]
Abstract
Oxidation of methanethiol (MT) is a significant step in the sulfur cycle. MT is an intermediate of metabolism of globally significant organosulfur compounds including dimethylsulfoniopropionate (DMSP) and dimethylsulfide (DMS), which have key roles in marine carbon and sulfur cycling. In aerobic bacteria, MT is degraded by a MT oxidase (MTO). The enzymatic and genetic basis of MT oxidation have remained poorly characterized. Here, we identify for the first time the MTO enzyme and its encoding gene (mtoX) in the DMS-degrading bacterium Hyphomicrobium sp. VS. We show that MTO is a homotetrameric metalloenzyme that requires Cu for enzyme activity. MTO is predicted to be a soluble periplasmic enzyme and a member of a distinct clade of the Selenium-binding protein (SBP56) family for which no function has been reported. Genes orthologous to mtoX exist in many bacteria able to degrade DMS, other one-carbon compounds or DMSP, notably in the marine model organism Ruegeria pomeroyi DSS-3, a member of the Rhodobacteraceae family that is abundant in marine environments. Marker exchange mutagenesis of mtoX disrupted the ability of R. pomeroyi to metabolize MT confirming its function in this DMSP-degrading bacterium. In R. pomeroyi, transcription of mtoX was enhanced by DMSP, methylmercaptopropionate and MT. Rates of MT degradation increased after pre-incubation of the wild-type strain with MT. The detection of mtoX orthologs in diverse bacteria, environmental samples and its abundance in a range of metagenomic data sets point to this enzyme being widely distributed in the environment and having a key role in global sulfur cycling.
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Affiliation(s)
- Özge Eyice
- School of Life Sciences, University of Warwick, Coventry, UK.,School of Biological and Chemical Sciences, Queen Mary University of London, London, UK
| | | | - Arjan Pol
- Department of Microbiology, Institute for Water and Wetland Research, Faculty of Science, Radboud University, Nijmegen, The Netherlands
| | - Ornella Carrión
- School of Biological Sciences, University of East Anglia, Norwich, UK
| | - Jonathan D Todd
- School of Biological Sciences, University of East Anglia, Norwich, UK
| | - Tom J Smith
- Department of Biosciences and Chemistry, Sheffield Hallam University, Sheffield, UK
| | - Stephen J Gurman
- Department of Physics and Astronomy, University of Leicester, Leicester, UK
| | | | - Sophie Mazard
- School of Life Sciences, University of Warwick, Coventry, UK
| | - Monique Ash Mennink-Kersten
- Department of Microbiology, Institute for Water and Wetland Research, Faculty of Science, Radboud University, Nijmegen, The Netherlands
| | - Timothy Dh Bugg
- Department of Chemistry, University of Warwick, Coventry, UK
| | | | | | - Huub Jm Op den Camp
- Department of Microbiology, Institute for Water and Wetland Research, Faculty of Science, Radboud University, Nijmegen, The Netherlands
| | - Hendrik Schäfer
- School of Life Sciences, University of Warwick, Coventry, UK
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Jeong JY, Zhou JR, Gao C, Feldman L, Sytkowski AJ. Human selenium binding protein-1 (hSP56) is a negative regulator of HIF-1α and suppresses the malignant characteristics of prostate cancer cells. BMB Rep 2015; 47:411-6. [PMID: 24874852 PMCID: PMC4163856 DOI: 10.5483/bmbrep.2014.47.7.104] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Indexed: 12/22/2022] Open
Abstract
In the present study, we demonstrate that ectopic expression of 56-kDa human selenium binding protein-1 (hSP56) in PC-3 cells that do not normally express hSP56 results in a marked inhibition of cell growth in vitro and in vivo. Down-regulation of hSP56 in LNCaP cells that normally express hSP56 results in enhanced anchorage-independent growth. PC-3 cells expressing hSP56 exhibit a significant reduction of hypoxia inducible protein (HIF)-1α protein levels under hypoxic conditions without altering HIF-1α mRNA (HIF1A) levels. Taken together, our findings strongly suggest that hSP56 plays a critical role in prostate cells by mechanisms including negative regulation of HIF-1α, thus identifying hSP56 as a candidate anti-oncogene product. [BMB Reports 2014; 47(7): 411-416]
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Affiliation(s)
- Jee-Yeong Jeong
- Laboratory for Cell and Molecular Biology, Division of Hematology and Oncology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA; Department of Biochemistry and Cancer Research Institute, Kosin University College of Medicine, Busan 602-703, Korea
| | - Jin-Rong Zhou
- Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
| | - Chong Gao
- Laboratory for Cell and Molecular Biology, Division of Hematology and Oncology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
| | - Laurie Feldman
- Laboratory for Cell and Molecular Biology, Division of Hematology and Oncology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
| | - Arthur J Sytkowski
- Laboratory for Cell and Molecular Biology, Division of Hematology and Oncology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215; Oncology Therapeutic Area, Quintiles Translational, Arlington, MA 02476,USA
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16
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Schild F, Kieffer-Jaquinod S, Palencia A, Cobessi D, Sarret G, Zubieta C, Jourdain A, Dumas R, Forge V, Testemale D, Bourguignon J, Hugouvieux V. Biochemical and biophysical characterization of the selenium-binding and reducing site in Arabidopsis thaliana homologue to mammals selenium-binding protein 1. J Biol Chem 2014; 289:31765-31776. [PMID: 25274629 PMCID: PMC4231655 DOI: 10.1074/jbc.m114.571208] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [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: 04/16/2014] [Revised: 09/17/2014] [Indexed: 12/19/2022] Open
Abstract
The function of selenium-binding protein 1 (SBP1), present in almost all organisms, has not yet been established. In mammals, SBP1 is known to bind the essential element selenium but the binding site has not been identified. In addition, the SBP family has numerous potential metal-binding sites that may play a role in detoxification pathways in plants. In Arabidopsis thaliana, AtSBP1 over-expression increases tolerance to two toxic compounds for plants, selenium and cadmium, often found as soil pollutants. For a better understanding of AtSBP1 function in detoxification mechanisms, we investigated the chelating properties of the protein toward different ligands with a focus on selenium using biochemical and biophysical techniques. Thermal shift assays together with inductively coupled plasma mass spectrometry revealed that AtSBP1 binds selenium after incubation with selenite (SeO3(2-)) with a ligand to protein molar ratio of 1:1. Isothermal titration calorimetry confirmed the 1:1 stoichiometry and revealed an unexpectedly large value of binding enthalpy suggesting a covalent bond between selenium and AtSBP1. Titration of reduced Cys residues and comparative mass spectrometry on AtSBP1 and the purified selenium-AtSBP1 complex identified Cys(21) and Cys(22) as being responsible for the binding of one selenium. These results were validated by site-directed mutagenesis. Selenium K-edge x-ray absorption near edge spectroscopy performed on the selenium-AtSBP1 complex demonstrated that AtSBP1 reduced SeO3(2-) to form a R-S-Se(II)-S-R-type complex. The capacity of AtSBP1 to bind different metals and selenium is discussed with respect to the potential function of AtSBP1 in detoxification mechanisms and selenium metabolism.
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Affiliation(s)
- Florie Schild
- Institut de Recherches en Technologies et Sciences pour le Vivant, Laboratoire de Physiologie Cellulaire et Végétale, CEA, Université Grenoble Alpes, CNRS UMR5168, INRA USC1359
| | - Sylvie Kieffer-Jaquinod
- Institut de Recherches en Technologies et Sciences pour le Vivant, Laboratoire de Biologie à Grande Echelle, Université Grenoble Alpes, CEA, INSERM, 17 rue des Martyrs, F-38000 Grenoble, France
| | - Andrés Palencia
- European Molecular Biology Laboratory Outstation, 71 avenue des Martyrs, F-38042 Grenoble, France and Unit for Virus Host-Cell Interactions, Université Grenoble Alpes-EMBL-CNRS, 71 avenue des Martyrs, 38042 France
| | - David Cobessi
- Université Grenoble Alpes, CEA, CNRS, Direction des Sciences du Vivant, Institut de Biologie Structurale, 6 rue Jules Horowitz, F-38044 Grenoble, France
| | - Géraldine Sarret
- Université Grenoble Alpes, CNRS & IRD, ISTerre, BP 53, F-38041 Grenoble, France
| | - Chloé Zubieta
- Institut de Recherches en Technologies et Sciences pour le Vivant, Laboratoire de Physiologie Cellulaire et Végétale, CEA, Université Grenoble Alpes, CNRS UMR5168, INRA USC1359
| | - Agnès Jourdain
- Institut de Recherches en Technologies et Sciences pour le Vivant, Laboratoire de Physiologie Cellulaire et Végétale, CEA, Université Grenoble Alpes, CNRS UMR5168, INRA USC1359
| | - Renaud Dumas
- Institut de Recherches en Technologies et Sciences pour le Vivant, Laboratoire de Physiologie Cellulaire et Végétale, CEA, Université Grenoble Alpes, CNRS UMR5168, INRA USC1359
| | - Vincent Forge
- Laboratoire de Chimie et Biologie des Métaux, Université Grenoble Alpes, CEA, CNRS, Institut de Recherches en Technologies et Sciences pour le Vivant, 17 rue des Martyrs, F-38000 Grenoble, France, and
| | - Denis Testemale
- Université Grenoble Alpes, CNRS, Institut NEEL, 25 rue des Martyrs, F-38042 Grenoble, France
| | - Jacques Bourguignon
- Institut de Recherches en Technologies et Sciences pour le Vivant, Laboratoire de Physiologie Cellulaire et Végétale, CEA, Université Grenoble Alpes, CNRS UMR5168, INRA USC1359
| | - Véronique Hugouvieux
- Institut de Recherches en Technologies et Sciences pour le Vivant, Laboratoire de Physiologie Cellulaire et Végétale, CEA, Université Grenoble Alpes, CNRS UMR5168, INRA USC1359,.
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17
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Jeandet P, Clément C, Courot E, Cordelier S. Modulation of phytoalexin biosynthesis in engineered plants for disease resistance. Int J Mol Sci 2013; 14:14136-70. [PMID: 23880860 PMCID: PMC3742236 DOI: 10.3390/ijms140714136] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Revised: 06/19/2013] [Accepted: 06/25/2013] [Indexed: 01/16/2023] Open
Abstract
Phytoalexins are antimicrobial substances of low molecular weight produced by plants in response to infection or stress, which form part of their active defense mechanisms. Starting in the 1950's, research on phytoalexins has begun with biochemistry and bio-organic chemistry, resulting in the determination of their structure, their biological activity as well as mechanisms of their synthesis and their catabolism by microorganisms. Elucidation of the biosynthesis of numerous phytoalexins has permitted the use of molecular biology tools for the exploration of the genes encoding enzymes of their synthesis pathways and their regulators. Genetic manipulation of phytoalexins has been investigated to increase the disease resistance of plants. The first example of a disease resistance resulting from foreign phytoalexin expression in a novel plant has concerned a phytoalexin from grapevine which was transferred to tobacco. Transformations were then operated to investigate the potential of other phytoalexin biosynthetic genes to confer resistance to pathogens. Unexpectedly, engineering phytoalexins for disease resistance in plants seem to have been limited to exploiting only a few phytoalexin biosynthetic genes, especially those encoding stilbenes and some isoflavonoids. Research has rather focused on indirect approaches which allow modulation of the accumulation of phytoalexin employing transcriptional regulators or components of upstream regulatory pathways. Genetic approaches using gain- or less-of functions in phytoalexin engineering together with modulation of phytoalexin accumulation through molecular engineering of plant hormones and defense-related marker and elicitor genes have been reviewed.
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Affiliation(s)
- Philippe Jeandet
- Laboratory of Stress, Defenses and Plant Reproduction, Research Unit “Vines and Wines of Champagne”, UPRES EA 4707, Faculty of Sciences, University of Reims, P.O. Box 1039, Reims 51687, France; E-Mails: (C.C.); (E.C.); (S.C.)
| | - Christophe Clément
- Laboratory of Stress, Defenses and Plant Reproduction, Research Unit “Vines and Wines of Champagne”, UPRES EA 4707, Faculty of Sciences, University of Reims, P.O. Box 1039, Reims 51687, France; E-Mails: (C.C.); (E.C.); (S.C.)
| | - Eric Courot
- Laboratory of Stress, Defenses and Plant Reproduction, Research Unit “Vines and Wines of Champagne”, UPRES EA 4707, Faculty of Sciences, University of Reims, P.O. Box 1039, Reims 51687, France; E-Mails: (C.C.); (E.C.); (S.C.)
| | - Sylvain Cordelier
- Laboratory of Stress, Defenses and Plant Reproduction, Research Unit “Vines and Wines of Champagne”, UPRES EA 4707, Faculty of Sciences, University of Reims, P.O. Box 1039, Reims 51687, France; E-Mails: (C.C.); (E.C.); (S.C.)
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18
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DI STASIO MICHELE, VOLPE MARIAGRAZIA, COLONNA GIOVANNI, NAZZARO MELISSA, POLIMENO MIRIAM, SCALA STEFANIA, CASTELLO GIUSEPPE, COSTANTINI SUSAN. A possible predictive marker of progression for hepatocellular carcinoma. Oncol Lett 2011; 2:1247-1251. [PMID: 22848296 PMCID: PMC3406508 DOI: 10.3892/ol.2011.378] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2011] [Accepted: 07/18/2011] [Indexed: 01/01/2023] Open
Abstract
The correlation between decreased levels of selenium and increased DNA damage and oxidative stress shows the significance of this trace element. A number of studies have provided evidence for lower serum, plasma and tissue levels of selenium in patients with various diseases and types of cancer. In this study, liver selenium concentrations were measured in tissue samples of patients with hepatocellular carcinoma (HCC) by atomic absorption spectrometry. The results showed that the selenium concentrations decreased when the malignant grade increased. Furthermore, a significant correlation was found between selenium levels and human selenium binding protein-1 (SELENBP1) down-regulation in the liver. Therefore, we suggest that the evaluation of selenium and SELENBP1 concentrations can be used for improving the prognosis of HCC.
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Affiliation(s)
| | | | - GIOVANNI COLONNA
- Department of Biochemistry and Biophysics and Interdepartmental Research Center for Computational and Biotechnological Sciences (CRISCEB), Second University of Naples, Naples
| | | | | | - STEFANIA SCALA
- ‘G. Pascale Foundation’ National Cancer Institute, Naples
| | - GIUSEPPE CASTELLO
- ‘G. Pascale Foundation’ National Cancer Institute, Cancer Research Center, Mercogliano, Avellino, Italy
| | - SUSAN COSTANTINI
- ‘G. Pascale Foundation’ National Cancer Institute, Cancer Research Center, Mercogliano, Avellino, Italy
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19
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Hugouvieux V, Dutilleul C, Jourdain A, Reynaud F, Lopez V, Bourguignon J. Arabidopsis putative selenium-binding protein1 expression is tightly linked to cellular sulfur demand and can reduce sensitivity to stresses requiring glutathione for tolerance. Plant Physiol 2009; 151:768-81. [PMID: 19710230 PMCID: PMC2754620 DOI: 10.1104/pp.109.144808] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2009] [Accepted: 08/24/2009] [Indexed: 05/22/2023]
Abstract
Selenium-Binding Protein1 (SBP1) gene expression was studied in Arabidopsis (Arabidopsis thaliana) seedlings challenged with several stresses, including cadmium (Cd), selenium {selenate [Se(VI)] and selenite [Se(IV)]}, copper (Cu), zinc (Zn), and hydrogen peroxide (H(2)O(2)) using transgenic lines expressing the luciferase (LUC) reporter gene under the control of the SBP1 promoter. In roots and shoots of SBP1LUC lines, LUC activity increased in response to Cd, Se(VI), Cu, and H(2)O(2) but not in response to Se(IV) or Zn. The pattern of expression of SBP1 was similar to that of PRH43, which encodes the 5'-Adenylylphosphosulfate Reductase2, a marker for the induction of the sulfur assimilation pathway, suggesting that an enhanced sulfur demand triggers SBP1 up-regulation. Correlated to these results, SBP1 promoter showed enhanced activity in response to sulfur starvation. The sulfur starvation induction of SBP1 was abolished by feeding the plants with glutathione (GSH) and was enhanced when seedlings were treated simultaneously with buthionine sulfoxide, which inhibits GSH synthesis, indicating that GSH level participates in the regulation of SBP1 expression. Changes in total GSH level were observed in seedlings challenged with Cd, Se(VI), and H(2)O(2). Accordingly, cad2-1 seedlings, affected in GSH synthesis, were more sensitive than wild-type plants to these three stresses. Moreover, wild-type and cad2-1 seedlings overexpressing SBP1 showed a significant enhanced tolerance to Se(VI) and H(2)O(2) in addition to the previously described resistance to Cd, highlighting that SBP1 expression decreases sensitivity to stress requiring GSH for tolerance. These results are discussed with regard to the potential regulation and function of SBP1 in plants.
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Affiliation(s)
- Véronique Hugouvieux
- Laboratoire de Physiologie Cellulaire Végétale, UMR 5168, Commissariat à l'Energie Atomique/CNRS/Université Joseph-Fourier/INRA, Institut de Recherches en Technologies et Sciences pour le Vivant, Commissariat à l'Energie Atomique-Grenoble, 38054 Grenoble cedex 9, France.
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20
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Oehrle NW, Sarma AD, Waters JK, Emerich DW. Proteomic analysis of soybean nodule cytosol. Phytochemistry 2008; 69:2426-38. [PMID: 18757068 DOI: 10.1016/j.phytochem.2008.07.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2008] [Revised: 06/24/2008] [Accepted: 07/18/2008] [Indexed: 05/13/2023]
Abstract
An isolation procedure for soybean (Glycine max L. cv Williams 82) nodule cytosol proteins was developed which greatly improved protein resolution by two-dimensional polyacrylamide gel electrophoresis. The most abundant proteins were selected and analyzed by mass spectrometry. The identified proteins were categorized by function (% of total proteins analyzed): carbon metabolism (28%), nitrogen metabolism (12%), reactive oxygen metabolism (12%) and vesicular trafficking (11%). The first three categories were expected based on the known physiological functions of the symbiotic nitrogen fixation process. The number of proteins involved in vesicular trafficking suggests a very active exchange of macromolecules and membrane components. Among the 69 identified proteins were the enzymes of the three carbon portion of glycolysis, which were further characterized to support their roles in the sucrose synthase pathway to provide malate for the bacteroids. Proteomic analysis provides a functional tool by which to understand and further investigate nodule function.
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Affiliation(s)
- Nathan W Oehrle
- United States Department of Agriculture, Curtis Hall, University of Missouri, Columbia, MO 65211, United States
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21
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Lieckfeldt E, Simon-Rosin U, Kose F, Zoeller D, Schliep M, Fisahn J. Gene expression profiling of single epidermal, basal and trichome cells of Arabidopsis thaliana. J Plant Physiol 2008; 165:1530-44. [PMID: 18006186 DOI: 10.1016/j.jplph.2007.06.017] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2007] [Revised: 06/06/2007] [Accepted: 06/10/2007] [Indexed: 05/24/2023]
Abstract
Samples of single epidermal, basal and trichome cells were collected by glass microcapillaries from 7-week-old Arabidopsis thaliana leaves. Transcript amplification of these single-cell samples was performed by RT PCR. For gene expression profiling, we hybridized the amplified transcriptome of each individual cell type to nylon membranes spotted with 16,000 Arabidopsis expressed sequence tags (ESTs). Initial analysis of the array filter data enabled us to functionally categorize transcripts that were present in each individual cell type. In order to confirm the filter array data, we used RT PCR. Results of this RT PCR approach confirmed the presence of 12 selected candidate genes in agreement with array filter hybridization data. Further, transcripts involved in detoxification and sulfur metabolism could be identified in epidermal cell extracts. Together, the results of our study provide the localization of approximately 1000 expressed genes to either pavement, basal or trichome cells. To cluster transcripts with similar expression levels, we developed a novel mathematical algorithm. Based on the mean and standard deviation, ratios of expression levels of a transcript were defined for pairs of the three cell types. This numerical analysis enabled subdivision into 67 categories of genes differentially expressed in epidermal, basal and trichome cells. Transcripts in each category displayed similar ratios of expression levels in the three cell types. Examples of these clusters are presented and discussed in Appendix A.
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Affiliation(s)
- Elke Lieckfeldt
- Max Planck Institute of Molecular Plant Physiology, Potsdam, Germany
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22
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Dutilleul C, Jourdain A, Bourguignon J, Hugouvieux V. The Arabidopsis putative selenium-binding protein family: expression study and characterization of SBP1 as a potential new player in cadmium detoxification processes. Plant Physiol 2008; 147:239-51. [PMID: 18354042 PMCID: PMC2330310 DOI: 10.1104/pp.107.114033] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2007] [Accepted: 03/11/2008] [Indexed: 05/20/2023]
Abstract
In Arabidopsis (Arabidopsis thaliana), the putative selenium-binding protein (SBP) gene family is composed of three members (SBP1-SBP3). Reverse transcription-polymerase chain reaction analyses showed that SBP1 expression was ubiquitous. SBP2 was expressed at a lower level in flowers and roots, whereas SBP3 transcripts were only detected in young seedling tissues. In cadmium (Cd)-treated seedlings, SBP1 level of expression was rapidly increased in roots. In shoots, SBP1 transcripts accumulated later and for higher Cd doses. SBP2 and SBP3 expression showed delayed or no responsiveness to Cd. In addition, luciferase (LUC) activity recorded on Arabidopsis lines expressing the LUC gene under the control of the SBP1 promoter further showed dynamic regulation of SBP1 expression during development and in response to Cd stress. Western-blot analysis using polyclonal antibodies raised against SBP1 showed that SBP1 protein accumulated in Cd-exposed tissues in correlation with SBP1 transcript amount. The sbp1 null mutant displayed no visible phenotype under normal and stress conditions that was explained by the up-regulation of SBP2 expression. SBP1 overexpression enhanced Cd accumulation in roots and reduced sensitivity to Cd in wild type and, more significantly, in Cd-hypersensitive cad mutants that lack phytochelatins. Similarly, in Saccharomyces cerevisiae, SBP1 expression led to increased Cd tolerance of the Cd-hypersensitive ycf1 mutant. In vitro experiments showed that SBP1 has the ability to bind Cd. These data highlight the importance of maintaining the adequate SBP protein level under healthy and stress conditions and suggest that, during Cd stress, SBP1 accumulation efficiently helps to detoxify Cd potentially through direct binding.
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Affiliation(s)
- Christelle Dutilleul
- Laboratoire de Physiologie Cellulaire Végétale, UMR 5168, Commissariat à l'Energie Atomique/CNRS/Université Joseph-Fourier/INRA, 38054 Grenoble cedex 9, France
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Li L, He H, Zhang J, Wang X, Bai S, Stolc V, Tongprasit W, Young ND, Yu O, Deng XW. Transcriptional analysis of highly syntenic regions between Medicago truncatula and Glycine max using tiling microarrays. Genome Biol 2008; 9:R57. [PMID: 18348734 PMCID: PMC2397509 DOI: 10.1186/gb-2008-9-3-r57] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2007] [Revised: 01/30/2008] [Accepted: 03/19/2008] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND Legumes are the third largest family of flowering plants and are unique among crop species in their ability to fix atmospheric nitrogen. As a result of recent genome sequencing efforts, legumes are now one of a few plant families with extensive genomic and transcriptomic data available in multiple species. The unprecedented complexity and impending completeness of these data create opportunities for new approaches to discovery. RESULTS We report here a transcriptional analysis in six different organ types of syntenic regions totaling approximately 1 Mb between the legume plants barrel medic (Medicago truncatula) and soybean (Glycine max) using oligonucleotide tiling microarrays. This analysis detected transcription of over 80% of the predicted genes in both species. We also identified 499 and 660 transcriptionally active regions from barrel medic and soybean, respectively, over half of which locate outside of the predicted exons. We used the tiling array data to detect differential gene expression in the six examined organ types and found several genes that are preferentially expressed in the nodule. Further investigation revealed that some collinear genes exhibit different expression patterns between the two species. CONCLUSION These results demonstrate the utility of genome tiling microarrays in generating transcriptomic data to complement computational annotation of the newly available legume genome sequences. The tiling microarray data was further used to quantify gene expression levels in multiple organ types of two related legume species. Further development of this method should provide a new approach to comparative genomics aimed at elucidating genome organization and transcriptional regulation.
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Affiliation(s)
- Lei Li
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT 06520, USA
- Current address: Department of Biology, University of Virginia, Charlottesville, VA 22904, USA
| | - Hang He
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT 06520, USA
- National Institute of Biological Sciences, Beijing 102206, China
- Peking-Yale Joint Research Center of Plant Molecular Genetics and Agrobiotechnology, Peking University, Beijing 100871, China
| | - Juan Zhang
- Donald Danforth Plant Science Center, St Louis, MO 63132, USA
| | - Xiangfeng Wang
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT 06520, USA
- National Institute of Biological Sciences, Beijing 102206, China
- Peking-Yale Joint Research Center of Plant Molecular Genetics and Agrobiotechnology, Peking University, Beijing 100871, China
| | - Sulan Bai
- College of Life Sciences, Capital Normal University, Beijing 100037, China
| | - Viktor Stolc
- Genome Research Facility, NASA Ames Research Center, Moffett Field, CA 94035, USA
| | - Waraporn Tongprasit
- Genome Research Facility, NASA Ames Research Center, Moffett Field, CA 94035, USA
| | - Nevin D Young
- Department of Plant Pathology, University of Minnesota, St Paul, MN 55108, USA
| | - Oliver Yu
- Donald Danforth Plant Science Center, St Louis, MO 63132, USA
| | - Xing-Wang Deng
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT 06520, USA
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Abstract
In response to overfeeding, geese develop fatty liver. To understand the fattening mechanism, mRNA differential display reverse transcription PCR was used to study the gene expression differences between French Landes grey geese and Xupu white geese in conditions of overfeeding and normal feeding. One gene was found to be up-regulated in the fatty liver in both breeds, and it has a 1797 bp cDNA with 83% identity to chicken SELENBP1. The sequence analysis revealed that its open reading frame of 1413 bp encodes a protein of 471 amino acids, which contains a putative conserved domain of 56 kDa selenium binding protein with high homology to its homologues of chicken (95%), rat (86%), mouse (84%), human (86%), monkey (86%), dog (86%), and cattle (86%). The function of this protein has been briefly reviewed based on published information. In tissue expression analysis, the expression of geese SELENBP1 mRNA was found to be higher in liver or kidney than in other tested tissues. The results showed that overfeeding could increase the mRNA expression level of geese SELENBP1.
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Affiliation(s)
- Ayong Zhao
- Department of Animal Nutrition and Science, School of Animal Science, Huazhong Agricultural University, Wuhan 430070, China.
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Alkhalfioui F, Renard M, Vensel WH, Wong J, Tanaka CK, Hurkman WJ, Buchanan BB, Montrichard F. Thioredoxin-linked proteins are reduced during germination of Medicago truncatula seeds. Plant Physiol 2007; 144:1559-79. [PMID: 17513483 PMCID: PMC1914137 DOI: 10.1104/pp.107.098103] [Citation(s) in RCA: 108] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Germination of cereals is accompanied by extensive change in the redox state of seed proteins. Proteins present in oxidized form in dry seeds are converted to the reduced state following imbibition. Thioredoxin (Trx) appears to play a role in this transition in cereals. It is not known, however, whether Trx-linked redox changes are restricted to cereals or whether they take place more broadly in germinating seeds. To gain information on this point, we have investigated a model legume, Medicago truncatula. Two complementary gel-based proteomic approaches were followed to identify Trx targets in seeds: Proteins were (1) labeled with a thiol-specific probe, monobromobimane (mBBr), following in vitro reduction by an NADP/Trx system, or (2) isolated on a mutant Trx affinity column. Altogether, 111 Trx-linked proteins were identified with few differences between axes and cotyledons. Fifty nine were new, 34 found previously in cereal or peanut seeds, and 18 in other plants or photosynthetic organisms. In parallel, the redox state of proteins assessed in germinating seeds using mBBr revealed that a substantial number of proteins that are oxidized or partly reduced in dry seeds became more reduced upon germination. The patterns were similar for proteins reduced in vivo during germination or in vitro by Trx. In contrast, glutathione and glutaredoxin were less effective as reductants in vitro. Overall, more than half of the potential targets identified with the mBBr labeling procedure were reduced during germination. The results provide evidence that Trx functions in the germination of seeds of dicotyledons as well as monocotyledons.
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Affiliation(s)
- Fatima Alkhalfioui
- Physiologie Moléculaire des Semences, Unité Mixte de Recherche 1191, Université d'Angers, Institut National d'Horticulture, Institut National de la Recherche Agronomique, Anjou Recherche Semences, Angers Cedex 01, France
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Daniels KM, Webb KE, McGilliard ML, Meyer MJ, Van Amburgh ME, Akers RM. Effects of Body Weight and Nutrition on Mammary Protein Expression Profiles in Holstein Heifers. J Dairy Sci 2006; 89:4276-88. [PMID: 17033015 DOI: 10.3168/jds.s0022-0302(06)72474-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
A proteomics approach was used to characterize biochemical and cellular mechanisms governing effects of peripubertal feeding on heifer mammary development. Mammary parenchymal tissue from 24 Holstein heifers randomly assigned to treatments arranged in a 2 x 2 factorial design was used to generate 2-dimensional protein maps of mammary tissue extracts. Heifers were reared on 1 of 2 dietary treatments, restricted (650 g/ d of daily gain) or elevated (950 g/d of daily gain) and killed at 1 of 2 body weights (BW, 200 or 350 kg). Cytosolic mammary gland extracts were prepared from frozen mammary parenchyma. Proteome maps of extracts were constructed using PDQuest software. Densities of 820 protein spots were analyzed using the MIXED procedure of SAS. Protein spots were characterized by changes in profiles of expression in response to increased BW, dietary treatment, or both. Dietary treatment influenced the expression of 131 protein spots, whereas heifer BW influenced the expression of 108 spots. The 22 most highly influenced (statistically) spots were excised and submitted for mass spectrometric analyses. Returned protein names and accession numbers were used in National Center for Biotechnology Information database searches to obtain information on the identified proteins. For example, one of the proteins that differed by dietary treatment, transferrin, a binding protein of insulin-like growth factor binding protein-3, was identified via these methods. Possible roles of this and other proteins in mammary development are described. We concluded that a proteomic approach is an effective tool for identifying the proteins involved in bovine mammary development.
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Affiliation(s)
- K M Daniels
- Department of Dairy Science, Virginia Polytechnic Institute and State University, Blacksburg 24061, USA
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27
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Agalou A, Spaink HP, Roussis A. Novel interaction of selenium-binding protein with glyceraldehyde-3-phosphate dehydrogenase and fructose-bisphosphate aldolase of Arabidopsis thaliana. Funct Plant Biol 2006; 33:847-856. [PMID: 32689295 DOI: 10.1071/fp05312] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2005] [Accepted: 05/16/2006] [Indexed: 06/11/2023]
Abstract
The metabolic role and regulation of selenium, particularly in plants, is poorly understood. One of the proteins probably involved in the metabolic regulation of this element is the selenium-binding protein (SBP) with homologues present across prokaryotic and eukaryotic species. The high degree of conservation of SBP in different organisms suggests that this protein may play a role in fundamental biological processes. In order to gain insight into the biochemical function of SBP in plants we used the yeast two-hybrid system to identify proteins that potentially interact with an Arabidopsis thaliana (L.) Heynh. homologue. Among the putative binding partners of SBP, a NADP-dependent glyceraldehyde-3-phosphate dehydrogenase (GAPDH) and a fructose-bisphosphate aldolase (FBA) were found as reliable positive candidates. The interaction of these proteins with SBP was confirmed by in vitro binding assays. Previous findings in Escherichia coli, demonstrated the direct binding of selenium to both GAPDH and aldolase. Therefore our results reveal the interaction, at least in pairs, of three proteins that are possibly linked to selenium and suggest the existence of a protein network consisting of at least SBP, GAPDH and FBA, triggered by or regulating selenium metabolism in plant cells.
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Affiliation(s)
- Adamantia Agalou
- Institute of Biology, Clusius Laboratory, Leiden University, Wassenaarseweg 64, 2333AL Leiden, The Netherlands
| | - Herman P Spaink
- Institute of Biology, Clusius Laboratory, Leiden University, Wassenaarseweg 64, 2333AL Leiden, The Netherlands
| | - Andreas Roussis
- Center for Human and Clinical Genetics, Leiden University Medical Center, Wassenaarseweg 72, 2333AL Leiden, The Netherlands. Current address: Agricultural University of Athens, Department of Agricultural Biotechnology, Iera odos 75, 118 55 Athens, Greece
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Agalou A, Roussis A, Spaink HP. The Arabidopsis selenium-binding protein confers tolerance to toxic levels of selenium. Funct Plant Biol 2005; 32:881-890. [PMID: 32689184 DOI: 10.1071/fp05090] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2005] [Accepted: 06/02/2005] [Indexed: 05/21/2023]
Abstract
In the Arabidopsis genome there are three highly conserved homologues of the mammalian 56-kD selenium-binding protein (SBP). To study the function of SBP in this model plant, we used a transgenic approach by constitutively overexpressing and down-regulating the endogenous Atsbp1 gene. In the latter case, we employed both a conventional antisense method and gene silencing by intron-containing hairpin RNAs. Atsbp1-overexpressing and silenced plants were phenotypically normal, under standard growth conditions, when compared with wild type plants. Transgenic plants exhibited different growth responses to exogenously supplied selenite, which correlated with the expression levels of Atsbp1. Plants with increased Atsbp1 transcript levels showed enhanced tolerance to selenite, while plants with reduced levels were more sensitive. Our results indicate that, although Atsbp1 does not play a detectable role in the regulation of developmental processes under normal growth conditions, it appears to be involved in processes controlling tolerance of Arabidopsis to selenium toxicity.
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Affiliation(s)
- Adamantia Agalou
- Institute of Biology, Leiden University, Clusius Laboratory, Wassenaarseweg 64, 2333 AL, Leiden, The Netherlands
| | - Andreas Roussis
- Institute of Biology, Leiden University, Clusius Laboratory, Wassenaarseweg 64, 2333 AL, Leiden, The Netherlands
| | - Herman P Spaink
- Institute of Biology, Leiden University, Clusius Laboratory, Wassenaarseweg 64, 2333 AL, Leiden, The Netherlands
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Vensel WH, Tanaka CK, Cai N, Wong JH, Buchanan BB, Hurkman WJ. Developmental changes in the metabolic protein profiles of wheat endosperm. Proteomics 2005; 5:1594-611. [PMID: 15800972 DOI: 10.1002/pmic.200401034] [Citation(s) in RCA: 154] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A combined two-dimensional gel electrophoresis-mass spectrometry approach was utilized to identify over 250 proteins of wheat (Triticum aestivum L., cv. Butte 86) starchy endosperm that participate in 13 biochemical processes: ATP interconversion reactions, carbohydrate metabolism, cell division, cytoskeleton, lipid metabolism, nitrogen metabolism, protein synthesis/assembly, protein turnover, signal transduction, protein storage, stress/defense, transcription/translation, and transport. Endosperm protein populations were compared at early (10 days post-anthesis, dpa) and late (36 dpa) stages of grain development. Analysis of protein number and spot volume revealed that carbohydrate metabolism, transcription/translation, and protein synthesis/assembly were the principal endosperm functions at 10 dpa followed by nitrogen metabolism, protein turnover, cytoskeleton, cell division, signal transduction, and lipid metabolism. Carbohydrate metabolism and protein synthesis/assembly were also major functions at 36 dpa, but stress/defense and storage were predominant. The results provide insight into biochemical events taking place during wheat grain development and highlight the value of proteomics in characterizing complex biochemical processes. Further, the proteome maps will facilitate future studies addressing the effects of genetic and environmental factors on the development and quality of wheat grain.
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Affiliation(s)
- William H Vensel
- U.S. Department of Agriculture, Agricultural Research Service, Western Regional Research Center, Albany, CA, USA
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Sawada K, Hasegawa M, Tokuda L, Kameyama J, Kodama O, Kohchi T, Yoshida K, Shinmyo A. Enhanced resistance to blast fungus and bacterial blight in transgenic rice constitutively expressing OsSBP, a rice homologue of mammalian selenium-binding proteins. Biosci Biotechnol Biochem 2005; 68:873-80. [PMID: 15118317 DOI: 10.1271/bbb.68.873] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The rice Oryza sativa selenium-binding protein homologue (OsSBP) gene encodes a homologue of mammalian selenium-binding proteins, and it has been isolated as one of the genes induced by treating a plant with a cerebroside elicitor from rice blast fungus. The possible role of OsSBP in plant defense was evaluated by using a transgenic approach. Plants overexpressing OsSBP showed enhanced resistance to a virulent strain of rice blast fungus as well as to rice bacterial blight. The expression of defense-related genes and the accumulation of phytoalexin after infection by rice blast fungus were accelerated in the OsSBP overexpressors. A higher level of H(2)O(2) accumulation and reduced activity of such scavenging enzymes as ascorbate peroxidase and catalase were seen when the OsSBP-overexpressing plants were treated with the protein phosphatase 1 inhibitor, calyculin A. These results suggest that the upregulation of OsSBP expression conferred enhanced tolerance to different pathogens, possibly by increasing plant sensitivity to endogenous defense responses. Additionally, the OsSBP protein might have a role in modulating the defense mechanism to biotic stress in rice.
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Abstract
Cell protrusive motility underlies cell fundamental biological processes such as cell growth, locomotion, and migration. Here I showed that selenium-binding protein (SBP) was exclusively located at the leading edges of rapidly growing protrusions in newly plated T98G glioma cells, and at the growing tips of the neurites in SH-SY5Y neuroblastoma cells. Double staining by anti-SBP antibody and deoxyribonuclease (DNase I) that labels monomeric G-actin or phalloidin that labels filamentous F-actin showed that the SBP-positive area was overstained by DNase I but, surprisingly, was not stained by phalloidin. When the cells were incubated with chemicals which block actin polymerization or activity of phosphatidylinositol 3-kinase, recruitment of SBP and G-actin at the cell margin was still observed, showing that their recruitment precedes actin polymerization. Taken together, I suggest that SBP may be involved in the initial sequential events in rapid cell outgrowth, such as determining direction of cell outgrowth and recruitment of actin monomer.
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Affiliation(s)
- Katsuyuki Miyaguchi
- Department of Neurology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, 565-0871, Osaka, Japan,
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Flemetakis E, Dimou M, Cotzur D, Aivalakis G, Efrose RC, Kenoutis C, Udvardi M, Katinakis P. A Lotus japonicus beta-type carbonic anhydrase gene expression pattern suggests distinct physiological roles during nodule development. Biochim Biophys Acta 2003; 1628:186-94. [PMID: 12932831 DOI: 10.1016/s0167-4781(03)00142-8] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A full-length cDNA clone, designated Ljca1, coding for a beta-type carbonic anhydrase (CA; EC: 4.2.1.1) was isolated from a Lotus japonicus nodule cDNA library. Semi-quantitative RT-PCR analysis revealed that Ljca1 codes for a nodule-specific CA, transcripts of which accumulate at maximum levels in young nodules at 14 days post-infection (d.p.i.). In situ hybridization and immunolocalization revealed that Ljca1 transcripts and LjCA1 polypeptides were present at high levels in all cell types of young nodules. In contrast, in mature nodules both transcripts and polypeptides were confined in a few cell layers of the nodules inner cortex. However, the central infected tissue of both young and mature nodules exhibited high CA activity, indicating the presence of additional CA isoforms of plant and/or microbial origin. This was supported by the finding that a putative Mesorhizobium loti CA gene was transiently expressed during nodule development. In addition, the temporal and spatial accumulation of phosphoenolpyruvate carboxylase (PEPC; EC: 4.1.1.31) was determined by semi-quantitative RT-PCR and immunolocalization. The results suggest that LjCA1 might fulfill different physiological needs during L. japonicus nodule development.
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Affiliation(s)
- Emmanouil Flemetakis
- Department of Agricultural Biotechnology, Agricultural University of Athens, Iera Odos 75, 118 55 Athens, Greece
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