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Wu K, Yang W, Yan Z, Wang H, Zheng Z, Jiang A, Wang X, Tang Z. Accurate quantification, naked eyes detection and bioimaging of nitrite using a colorimetric and near-infrared fluorescent probe in food samples and Escherichia coli. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 282:121692. [PMID: 35921752 DOI: 10.1016/j.saa.2022.121692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2022] [Revised: 07/16/2022] [Accepted: 07/26/2022] [Indexed: 06/15/2023]
Abstract
Nitrite (NO2-) is an inorganic contaminant that exists widely in the environment including water and food products, excessive amounts of NO2- would threaten humans and aquatic life. Developing a rapid and convenient sensing method for NO2- remains a great challenge. Herein, a colorimetric and near-infrared fluorescent probe (TBM) was synthesized and applied for sensitively and selectively detecting NO2- in water, food samples and Escherichia coli (E. coli). With the addition of NO2-, the probe TBM solution has a distinct visual color changed from red to colorless and fluorescence intensity at 620 nm quickly decreased. The probe TBM could detect NO2- quantitatively with a detection limit of 85 nM based on a 3σ/slope. Under optimum conditions, TBM has been successfully used to detect NO2- in real-world environmental and dietary samples, with positive results. Besides, paper strips loaded with TBM have been used to visually determine NO2- levels. Most importantly, TBM has also been proven to be able to discriminate from different concentrations of NO2- in E. coli by fluorescence imaging. In summary, the probe TBM was successfully developed for the accurate quantification, naked eyes detection and bioimaging of NO2- in water, food samples and E. coli, which provides a useful tool to better guarantee the quality and safety of daily life and food industry.
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Affiliation(s)
- Ke Wu
- Innovation Research Institute of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan 250355, PR China
| | - Wenjie Yang
- Innovation Research Institute of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan 250355, PR China
| | - Zhi Yan
- College of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan 250355, PR China
| | - Haichao Wang
- College of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan 250355, PR China
| | - Zhijuan Zheng
- Experimental Center, Shandong University of Traditional Chinese Medicine, Jinan 250355, PR China; Key Laboratory of Traditional Chinese Medicine Classical Theory, Ministry of Education, Shandong University of Traditional Chinese Medicine, Jinan 250355, PR China; Shandong Provincial Key Laboratory of Traditional Chinese Medicine for Basic Research, Shandong University of Traditional Chinese Medicine, Jinan 250355, PR China
| | - Anqi Jiang
- College of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan 250355, PR China
| | - Xiaoming Wang
- Experimental Center, Shandong University of Traditional Chinese Medicine, Jinan 250355, PR China; Key Laboratory of Traditional Chinese Medicine Classical Theory, Ministry of Education, Shandong University of Traditional Chinese Medicine, Jinan 250355, PR China; Shandong Provincial Key Laboratory of Traditional Chinese Medicine for Basic Research, Shandong University of Traditional Chinese Medicine, Jinan 250355, PR China.
| | - Zhixin Tang
- Experimental Center, Shandong University of Traditional Chinese Medicine, Jinan 250355, PR China; Key Laboratory of Traditional Chinese Medicine Classical Theory, Ministry of Education, Shandong University of Traditional Chinese Medicine, Jinan 250355, PR China; Shandong Provincial Key Laboratory of Traditional Chinese Medicine for Basic Research, Shandong University of Traditional Chinese Medicine, Jinan 250355, PR China.
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Ullah A, Hussain A, Shaban M, Khan AH, Alariqi M, Gul S, Jun Z, Lin S, Li J, Jin S, Munis MFH. Osmotin: A plant defense tool against biotic and abiotic stresses. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2018; 123:149-159. [PMID: 29245030 DOI: 10.1016/j.plaphy.2017.12.012] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Revised: 12/05/2017] [Accepted: 12/06/2017] [Indexed: 05/18/2023]
Abstract
Plants are prone to a number of pathogens and abiotic stresses that cause various disorders. However, plants possess a defense mechanism to cope with these stresses. The osmotin protein belongs to the PR-5 family of Pathogenesis-related (PR) proteins, which are produced in response to diseases caused by various biotic and abiotic stresses. Osmotin uses a signal transduction pathway to inhibit the activity of defensive cell wall barriers and increases its own cytotoxic efficiency. However, in response to cytotoxic effects, this pathway stimulates a mitogen-activated protein kinase (MAPK) cascade that triggers changes in the cell wall and enables osmotin's entrance into the plasma membrane. This mechanism involves cell wall binding and membrane perturbation, although the complete mechanism of osmotin activity has not been fully elucidated. Osmotin possesses an acidic cleft that is responsible for communication with its receptor in the plasma membrane of fungi. Osmotin is also involved in the initiation of apoptosis and programmed cell death, whereas its overexpression causes the accumulation of proline in transgenic plants. A higher concentration of osmotin can cause the lysis of hyphae tips. This review highlights the role of osmotin protein in the plant defense mechanism and its mode of action against numerous pathogens in wild and transgenic plants.
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Affiliation(s)
- Abid Ullah
- College of Plant Science and Technology, National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, Hubei 430070, PR China
| | - Amjad Hussain
- College of Plant Science and Technology, National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, Hubei 430070, PR China
| | - Muhammad Shaban
- College of Plant Science and Technology, National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, Hubei 430070, PR China
| | - Aamir Hamid Khan
- College of Plant Science and Technology, National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, Hubei 430070, PR China
| | - Muna Alariqi
- College of Plant Science and Technology, National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, Hubei 430070, PR China
| | - Summia Gul
- Department of Biology, Institute of Microbiology, Heinrich Heine University Düsseldorf, Germany
| | - Zhang Jun
- College of Plant Science and Technology, National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, Hubei 430070, PR China
| | - Sun Lin
- College of Plant Science and Technology, National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, Hubei 430070, PR China
| | - Jianying Li
- College of Plant Science and Technology, National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, Hubei 430070, PR China
| | - Shuangxia Jin
- College of Plant Science and Technology, National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, Hubei 430070, PR China.
| | - Muhammad Farooq Hussain Munis
- Department of Plant Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan; University of California, Department of Plant Pathology, 354 Hutchison Hall, One Shields Ave, Davis, CA 95616-8680, USA.
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González M, Brito N, González C. The Botrytis cinerea elicitor protein BcIEB1 interacts with the tobacco PR5-family protein osmotin and protects the fungus against its antifungal activity. THE NEW PHYTOLOGIST 2017; 215:397-410. [PMID: 28480965 DOI: 10.1111/nph.14588] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Accepted: 03/27/2017] [Indexed: 05/02/2023]
Abstract
The broad-range phytopathogenic fungus Botrytis cinerea secretes hundreds of proteins during infection of its plant hosts. One of these proteins, BcIEB1, is abundantly secreted and is able to elicit plant defenses, probably as a pathogen-associated molecular pattern, although its native function in B. cinerea biology remains unknown. Pull-down experiments designed to isolate the molecular target of BcIEB1 in tobacco resulted in the identification of osmotin, a pathogenesis-related protein of family 5 that shows antifungal activity. The expression of osmotin in Escherichia coli allowed the verification of the BcIEB1-osmotin interaction with pure proteins by pull-down and far Western blot experiments, as well as the confirmation of the activity of osmotin against B. cinerea. Interestingly, B. cinerea Δbcieb1 mutants are more susceptible than the wild-type to osmotin, and the external addition of pure BcIEB1 protects the Δbcieb1 mutants, as well as Saccharomyces cerevisiae, from the antifungal action of osmotin, thus pointing at PR5 inhibition as the primary native function of BcIEB1. The question of whether osmotin is also involved in the activation of plant defenses by BcIEB1 is also addressed, and the data suggest that osmotin does not participate in the elicitation process.
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Affiliation(s)
- Mario González
- Departamento de Bioquímica, Microbiología, Biología Celular y Genética, Universidad de La Laguna, 38206, La Laguna (Tenerife), Spain
| | - Nélida Brito
- Departamento de Bioquímica, Microbiología, Biología Celular y Genética, Universidad de La Laguna, 38206, La Laguna (Tenerife), Spain
| | - Celedonio González
- Departamento de Bioquímica, Microbiología, Biología Celular y Genética, Universidad de La Laguna, 38206, La Laguna (Tenerife), Spain
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Viktorova J, Rehorova K, Musilova L, Suman J, Lovecka P, Macek T. New findings in potential applications of tobacco osmotin. Protein Expr Purif 2017; 129:84-93. [PMID: 27654923 DOI: 10.1016/j.pep.2016.09.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Revised: 09/14/2016] [Accepted: 09/18/2016] [Indexed: 02/06/2023]
Abstract
The osmotin protein is involved in both monocot and dicot plant responses to biotic and abiotic stress. To determine the biological activity of osmotin, the gene was amplified from tobacco genomic DNA, fused with the hexahistidine tag motif and successfully expressed in Escherichia coli, after which the recombinant osmotin was purified and renatured. Various activities were then tested, including hemolytic activity, toxicity against human embryonic kidney cells, and the antifungal activity of the recombinant osmotin. We found that osmotin had no adverse effects on human kidney cells up to a concentration of 500 μg.ml-1. However, the purified osmotin also had significant antimicrobial activity, specifically against fungal pathogens causing candidiasis and otitis, and against the common food pathogens. Using the osmotin-Agrobacterium construct, the osmotin gene was inserted into tobacco plants in order to facilitate the isolation of recombinant protein. Using qPCR, the presence and copy number of the transgene was detected in the tobacco plant DNA. The transgene was also quantified using mRNA, and results indicated a strong expression profile, however the native protein has been never isolated. Once the transgene presence was confirmed, the transgenic tobacco plants were grown in high saline concentrations and monitored for seed germination and chlorophyll content as indicators of overall plant health. Results indicated that the transgenic tobacco plants had a higher tolerance for osmotic stress. These results indicate that the osmotin gene has the potential to increase crop tolerance to stresses such as fungal attack and unfavorable osmotic conditions.
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Affiliation(s)
- Jitka Viktorova
- Department of Biochemistry and Microbiology, University of Chemistry and Technology, Prague, Technicka 5, 166 28, Prague 6, Czech Republic
| | - Katerina Rehorova
- Department of Biochemistry and Microbiology, University of Chemistry and Technology, Prague, Technicka 5, 166 28, Prague 6, Czech Republic
| | - Lucie Musilova
- Department of Biochemistry and Microbiology, University of Chemistry and Technology, Prague, Technicka 5, 166 28, Prague 6, Czech Republic
| | - Jachym Suman
- Department of Biochemistry and Microbiology, University of Chemistry and Technology, Prague, Technicka 5, 166 28, Prague 6, Czech Republic
| | - Petra Lovecka
- Department of Biochemistry and Microbiology, University of Chemistry and Technology, Prague, Technicka 5, 166 28, Prague 6, Czech Republic
| | - Tomas Macek
- Department of Biochemistry and Microbiology, University of Chemistry and Technology, Prague, Technicka 5, 166 28, Prague 6, Czech Republic.
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Cloning, characterization, and bacterial over-expression of an osmotin-like protein gene from Solanum nigrum L. with antifungal activity against three necrotrophic fungi. Mol Biotechnol 2015; 57:371-81. [PMID: 25572937 DOI: 10.1007/s12033-014-9831-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
A new osmotin-like protein gene from Solanum nigrum L. var indica (SindOLP) was cloned and overexpressed in Escherichia coli. The full-length intron-less gene is 744 bp, encoding a mature protein of 247 amino acids with a molecular mass of 26 kDa. The protein has an N-terminal cleavable signal sequence of 21 amino acids. There is the Thaumatin family signature pattern, with one each of amidation, N-myristoylation, casein kinase II phosphorylation, tyrosine kinase phosphorylation, and protein kinase C phosphorylation sites. Hydropathy plot showed that it has six transmembrane helices. It has antifungal activity and can permeabilize fungal hyphae and spores. SindOLP is most active at pH 8, 25 °C and its antifungal activity is retained after 75 °C for 30 min. SindOLP inhibits fungal spore germination. The protein however lacks glucanase activity. The potential for SindOLP in developing fungus-resistant, transgenic crops is discussed.
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Anil Kumar S, Hima Kumari P, Shravan Kumar G, Mohanalatha C, Kavi Kishor PB. Osmotin: a plant sentinel and a possible agonist of mammalian adiponectin. FRONTIERS IN PLANT SCIENCE 2015; 6:163. [PMID: 25852715 PMCID: PMC4360817 DOI: 10.3389/fpls.2015.00163] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Accepted: 03/01/2015] [Indexed: 05/18/2023]
Abstract
Osmotin is a stress responsive antifungal protein belonging to the pathogenesis-related (PR)-5 family that confers tolerance to both biotic and abiotic stresses in plants. Protective efforts of osmotin in plants range from high temperature to cold and salt to drought. It lyses the plasma membrane of the pathogens. It is widely distributed in fruits and vegetables. It is a differentially expressed and developmentally regulated protein that protects the cells from osmotic stress and invading pathogens as well, by structural or metabolic alterations. During stress conditions, osmotin helps in the accumulation of the osmolyte proline, which quenches reactive oxygen species and free radicals. Osmotin expression results in the accumulation of storage reserves and increases the shelf-life of fruits. It binds to a seven-transmembrane-domain receptor-like protein and induces programmed cell death in Saccharomyces cerevisiae through RAS2/cAMP signaling pathway. Adiponectin, produced in adipose tissues of mammals, is an insulin-sensitizing hormone. Strangely, osmotin acts like the mammalian hormone adiponectin in various in vitro and in vivo models. Adiponectin and osmotin, the two receptor binding proteins do not share sequence similarity at the amino acid level, but interestingly they have a similar structural and functional properties. In experimental mice, adiponectin inhibits endothelial cell proliferation and migration, primary tumor growth, and reduces atherosclerosis. This retrospective work examines the vital role of osmotin in plant defense and as a potential targeted therapeutic drug for humans.
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Affiliation(s)
- S. Anil Kumar
- Department of Genetics, Osmania University, HyderabadIndia
| | - P. Hima Kumari
- Department of Genetics, Osmania University, HyderabadIndia
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Sun D, Zhang H, Wu G, Zhu Q, Lv S, Guo D, Wu R, Bao J. Metal-binding activity of the soluble recombinant pig metallothionein 1A expressed in Escherichia coli. Biol Trace Elem Res 2012; 150:418-23. [PMID: 22760644 DOI: 10.1007/s12011-012-9470-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2012] [Accepted: 06/21/2012] [Indexed: 10/28/2022]
Abstract
Full-length cDNA for the pig metallothionein 1A (pMT1A) gene was synthesized based on the pig MT1A gene sequence in Genbank and cloned into the pMD18-T vector. After sequence analysis and structure prediction, the pMT1A gene was cloned into vector pET-32a (+) containing a His-tag. The recombinant pMT1A (rpMT1A) was expressed in a soluble form using Escherichia coli Rosetta™ (DE3) plysS cells. Western blotting showed that the purified rpMT1A protein bound an anti-His-tag monoclonal antibody. Further investigation revealed that the rpMT1A protein showed high metal-binding activity with the divalent metal ions copper (Cu²⁺), zinc (Zn²⁺), and cadmium (Cd²⁺).
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Affiliation(s)
- Dongbo Sun
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing High-tech Industrial Development Zone, Daqing, 163319, People's Republic of China.
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Sun D, Shi H, Chen J, Guo D, Liu Q, He X, Bao J, Wang Y, Qiu H, Feng L. Virus-binding activity of the truncated C subunit of porcine aminopeptidase N expressed in Escherichia coli. Biotechnol Lett 2011; 34:533-9. [PMID: 22083718 PMCID: PMC7087752 DOI: 10.1007/s10529-011-0795-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2011] [Accepted: 11/03/2011] [Indexed: 11/24/2022]
Abstract
Seven overlapping truncated forms of the C subunit of porcine aminopeptidase N (pAPN-C) were expressed in Escherichia coli. By western blotting and ELISA test, all recombinant proteins were recognized by the antibody against native porcine aminopeptidase N. Recombinant proteins, rpAPN-C2 (aa 623–722) and rpAPN-C3 (aa 673–772), had the highest binding activity with swine transmissible gastroenteritis virus among the truncated pAPN-C recombinant proteins. The overlapping region (aa 673–722) between rpAPN-C2 and rpAPN-C3 is indicated to play a key role in viral binding.
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Affiliation(s)
- Dongbo Sun
- Division of Swine Infectious Diseases, National Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute of the Chinese Academy of Agricultural Sciences, Nangang District, Harbin 150001, People's Republic of China.
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