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Imran M, Barboza AL, Asad S, Khalid ZM, Mukhtar Z. Expression patterns of cp4- epsps gene in diverse transgenic Saccharum officinarum L. genotypes. PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS : AN INTERNATIONAL JOURNAL OF FUNCTIONAL PLANT BIOLOGY 2019; 25:779-786. [PMID: 31168239 PMCID: PMC6522613 DOI: 10.1007/s12298-019-00650-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 01/25/2019] [Accepted: 02/13/2019] [Indexed: 06/09/2023]
Abstract
Glyphosate, a functional analogue of phosphoenolpyruvate (PEP), blocks the shikimate pathway by inhibiting the enzyme 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS; EC 2.5.1.19) through interference with the conversion of (shikimate-3-phosphate) S3P and PEP to 5-enolpyruvylshikimate-3-phosphate (EPSP) and subsequently leads to plant death. This metabolic pathway possesses great potential to be used for development of herbicide resistant transgenic crops and here in this study, we wanted to check the expression potential of CP4-EPSPS gene in various sugarcane genotypes. A synthetic version of CP4-EPSPS gene synthesized commercially, cloned in pGreen0029 vector, was transformed into regenerable embryogenic calli of three different sugarcane cultivars HSF-240, S2003US-778 and S2003US-114 using biolistic gene transfer approach for comparative transcriptional studies. Transgenic lines screened by PCR analysis were subjected to Southern hybridization for checking transgene integration patterns. All the tested lines were found to contain multiple (3-6) insert copies. Putative transgenic plants produced the CP4-EPSPS protein which was detected using immunoblot analysis. The CP4-EPSPS transcript expression detected by qRT-PCR was found to vary from genotype to genotype and is being reported first time. In vitro glyphosate assay showed that transformed plants were conferring herbicide tolerance. It is concluded that different cultivars of sugarcane give variable expression of the same transgene and reasons for this phenomenon needs to be investigated.
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Affiliation(s)
- Muhammad Imran
- Agricultural Biotechnology Division, National Institute for Biotechnology and Genetic Engineering, P.O. Box 577, Jhang Road, Faisalabad, Pakistan
- Pakistan Institute of Engineering and Applied Sciences, Nilore, Islamabad, Pakistan
| | - Andre Luiz Barboza
- Laboratory of Genomics and Molecular Biology, Department of Biological Sciences, Escola Superior Agricultura Luiz De Quiroz, University of Sao Paulo, Piracicaba, SP Brazil
| | - Shaheen Asad
- Agricultural Biotechnology Division, National Institute for Biotechnology and Genetic Engineering, P.O. Box 577, Jhang Road, Faisalabad, Pakistan
- Pakistan Institute of Engineering and Applied Sciences, Nilore, Islamabad, Pakistan
| | - Zafar M. Khalid
- Department of Bioinformatics and Biotechnology, International Islamic University, Islamabad, Pakistan
| | - Zahid Mukhtar
- Agricultural Biotechnology Division, National Institute for Biotechnology and Genetic Engineering, P.O. Box 577, Jhang Road, Faisalabad, Pakistan
- Pakistan Institute of Engineering and Applied Sciences, Nilore, Islamabad, Pakistan
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Yu X, Zhang X, Wang Z, Jiang H, Lv Z, Shen J, Xia G, Wen K. Universal simultaneous multiplex ELISA of small molecules in milk based on dual luciferases. Anal Chim Acta 2017; 1001:125-133. [PMID: 29291795 DOI: 10.1016/j.aca.2017.11.038] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2017] [Revised: 10/31/2017] [Accepted: 11/17/2017] [Indexed: 11/29/2022]
Abstract
The enzyme-linked immunosorbent assay (ELISA) has become the most important and widely used rapid detection technology for food safety because of its simple operation, fast speed and high sensitivity. Multiplex synchronous detection is the goal of ELISA that is always pursuing for. However, the reported multiplex ELISAs have not truly realized synchronous detection because of the complex signal generation and collection procedures. Here, we developed a dual-luciferases competitive direct bioluminescent immunoassay (DBL-cdELISA) with only one substrate addition step followed immediately by simultaneous signal acquisition. It is the first report of simultaneous multiplex analysis of small molecules based on microtiter plates and enzymes without any additional steps. The IC50 values for norfloxacin (NOR) and sulfamethazine (SMZ) were 0.051 ng mL-1 and 0.211 ng mL-1, respectively. The results demonstrated that the application of different luciferases and substrates simplified the signal generation and collection procedures and enabled simultaneous detection of small molecules with a simple procedure, high throughput and fast speed, that will be of great significance for the development of multiple assays.
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Affiliation(s)
- Xuezhi Yu
- College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, Beijing Laboratory for Food Quality and Safety, No.2 Yuanmingyuan West Road, Haidian District, Beijing 100193, People's Republic of China
| | - Xiya Zhang
- College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, Beijing Laboratory for Food Quality and Safety, No.2 Yuanmingyuan West Road, Haidian District, Beijing 100193, People's Republic of China
| | - Zhanhui Wang
- College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, Beijing Laboratory for Food Quality and Safety, No.2 Yuanmingyuan West Road, Haidian District, Beijing 100193, People's Republic of China
| | - Haiyang Jiang
- College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, Beijing Laboratory for Food Quality and Safety, No.2 Yuanmingyuan West Road, Haidian District, Beijing 100193, People's Republic of China
| | - Ziquan Lv
- Department of Genetic Toxicology, Shenzhen Center for Disease Control and Prevention, No.8, Longyuan Road, Longzhu Road, Nanshan District, Shenzhen 518020, People's Republic of China
| | - Jianzhong Shen
- College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, Beijing Laboratory for Food Quality and Safety, No.2 Yuanmingyuan West Road, Haidian District, Beijing 100193, People's Republic of China
| | - Guoliang Xia
- State Key Laboratory for Agro-Biotechnology, College of Biological Science, China Agricultural University, No.2 Yuanmingyuan West Road, Haidian District, Beijing 100193, People's Republic of China
| | - Kai Wen
- College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, Beijing Laboratory for Food Quality and Safety, No.2 Yuanmingyuan West Road, Haidian District, Beijing 100193, People's Republic of China.
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Zhou J, Wang D, Xi Y, Zhu X, Yang Y, Lv M, Luo C, Chen J, Ye X, Fang L, Xiao S. Assessing activity of Hepatitis A virus 3C protease using a cyclized luciferase-based biosensor. Biochem Biophys Res Commun 2017; 488:621-627. [PMID: 28501618 PMCID: PMC7092888 DOI: 10.1016/j.bbrc.2017.05.063] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Accepted: 05/10/2017] [Indexed: 01/02/2023]
Abstract
Hepatitis A is an acute infection caused by Hepatitis A virus (HAV), which is widely distributed throughout the world. The HAV 3C cysteine protease (3Cpro), an important nonstructural protein, is responsible for most cleavage within the viral polyprotein and is critical for the processes of viral replication. Our group has previously demonstrated that HAV 3Cpro cleaves human NF-κB essential modulator (NEMO), a kinase required in interferon signaling. Based on this finding, we generated four luciferase-based biosensors containing the NEMO sequence (PVLKAQ↓ADIYKA) that is cleaved by HAV 3Cpro and/or the Nostoc punctiforme DnaE intein, to monitor the activity of HAV 3Cpro in human embryonic kidney cells (HEK-293T). Western blotting showed that HAV 3Cpro recognized and cleaved the NEMO cleavage sequence incorporated in the four biosensors, whereas only one cyclized luciferase-based biosensor (233-DnaE-HAV, 233DH) showed a measurable and reliable increase in firefly luciferase activity, with very low background, in the presence of HAV 3Cpro. With this biosensor (233DH), we monitored HAV 3Cpro activity in HEK-293T cells, and tested it against a catalytically deficient mutant HAV 3Cpro and other virus-encoded proteases. The results showed that the activity of this luciferase biosensor is specifically dependent on HAV 3Cpro. Collectively, our data demonstrate that the luciferase biosensor developed here might provide a rapid, sensitive, and efficient evaluation of HAV 3Cpro activity, and should extend our better understanding of the biological relevance of HAV 3Cpro.
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Affiliation(s)
- Junwei Zhou
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
| | - Dang Wang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China.
| | - Yongqiang Xi
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Xinyu Zhu
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Yuting Yang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Mengting Lv
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Chuanzhen Luo
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
| | - Jiyao Chen
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Xu Ye
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Liurong Fang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
| | - Shaobo Xiao
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
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Moyle RL, Carvalhais LC, Pretorius LS, Nowak E, Subramaniam G, Dalton-Morgan J, Schenk PM. An Optimized Transient Dual Luciferase Assay for Quantifying MicroRNA Directed Repression of Targeted Sequences. FRONTIERS IN PLANT SCIENCE 2017; 8:1631. [PMID: 28979287 PMCID: PMC5611435 DOI: 10.3389/fpls.2017.01631] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Accepted: 09/05/2017] [Indexed: 05/04/2023]
Abstract
Studies investigating the action of small RNAs on computationally predicted target genes require some form of experimental validation. Classical molecular methods of validating microRNA action on target genes are laborious, while approaches that tag predicted target sequences to qualitative reporter genes encounter technical limitations. The aim of this study was to address the challenge of experimentally validating large numbers of computationally predicted microRNA-target transcript interactions using an optimized, quantitative, cost-effective, and scalable approach. The presented method combines transient expression via agroinfiltration of Nicotiana benthamiana leaves with a quantitative dual luciferase reporter system, where firefly luciferase is used to report the microRNA-target sequence interaction and Renilla luciferase is used as an internal standard to normalize expression between replicates. We report the appropriate concentration of N. benthamiana leaf extracts and dilution factor to apply in order to avoid inhibition of firefly LUC activity. Furthermore, the optimal ratio of microRNA precursor expression construct to reporter construct and duration of the incubation period post-agroinfiltration were determined. The optimized dual luciferase assay provides an efficient, repeatable and scalable method to validate and quantify microRNA action on predicted target sequences. The optimized assay was used to validate five predicted targets of rice microRNA miR529b, with as few as six technical replicates. The assay can be extended to assess other small RNA-target sequence interactions, including assessing the functionality of an artificial miRNA or an RNAi construct on a targeted sequence.
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Patel J, Kowalczuk M. Expression of concern: Synthetic versions of firefly luciferase and Renilla luciferase reporter genes that resist transgene silencing in sugarcane. BMC PLANT BIOLOGY 2015; 15:293. [PMID: 26715544 PMCID: PMC4696134 DOI: 10.1186/s12870-015-0671-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Accepted: 12/01/2015] [Indexed: 06/05/2023]
Affiliation(s)
- Jigisha Patel
- The authors of this Expression of Concern are members of The Research Integrity Group at BioMed Central. BioMed Central, 236 Gray's Inn Road, London, WC1X 8HB, UK
| | - Maria Kowalczuk
- The authors of this Expression of Concern are members of The Research Integrity Group at BioMed Central. BioMed Central, 236 Gray's Inn Road, London, WC1X 8HB, UK.
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