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Rajabi N, Safarnejad MR, Rakhshandehroo F, Shamsbakhsh M, Rabbani H. Developing of specific monoclonal recombinant antibody fused to alkaline phosphatase (AP) for one-step detection of fig mosaic virus. 3 Biotech 2022; 12:88. [PMID: 35299990 PMCID: PMC8901858 DOI: 10.1007/s13205-022-03154-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Accepted: 02/18/2022] [Indexed: 11/01/2022] Open
Abstract
Present study was performed to develop a fusion recombinant monoclonal antibody for one-step and accurate detection of FMV with a specific single-chain variable fragment (scFv) fused to alkaline phosphatase (AP) named as scFv(FMV-NP)-AP. The gene encoding-specific scFv recombinant antibody binding to nucleocapsid protein of Fig Mosaic Virus (FMV-NP) was fused to upstream of AP gene and integrated in pET26b bacterial expression vector. As vector contain pelB signal peptide, the expressed protein is secreted into periplasmic compartment. Recombinant fusion protein was produced in transformed E. coli following induction by IPTG. Extraction and purification of fusion protein was performed under denatured condition. The results of SDS-PAGE and western blot analysis indicated high integrity and purity with a single band protein with expected size of 72 kDa. The total yield of purified scFv(FMV-NP)-AP fusion protein estimated around 0.5-1 mg/l cultured medium. Subsequent colorimetric analysis confirmed presence of alkaline phosphatase activity in prepared scFv-AP fusion protein. Specificity of generated recombinant fusion antibody against cognate antigen and the native virus presented in infected plant extracts was assessed by ELISA, western blot and dot blot assays. Results revealed that scFv(FMV-NP)-AP is able to detect the presence of FMV in infected fig plants. The novel approach, implementing specific recombinant fusion antibody developed in this research, leads to one-step detection of FMV in plants by avoiding the use of chemical enzyme-labeled secondary antibodies.
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Yao J, Wang Z, Guo L, Xu X, Liu L, Xu L, Song S, Xu C, Kuang H. Advances in immunoassays for organophosphorus and pyrethroid pesticides. Trends Analyt Chem 2020. [DOI: 10.1016/j.trac.2020.116022] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Simonovic M, Ostojic S, Micic D, Bisercic-Savic M, Mix T, Glumac M, Pejin B. A novel and effective natural product-based immunodetection tool for TNT-like compounds. Nat Prod Res 2020; 36:857-861. [PMID: 32787566 DOI: 10.1080/14786419.2020.1806269] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
This study aimed to develop a fast and reliable protocol for Trinitrophenol-Tris(hydroxymethyl)aminomethane (TNP-Tris) detection applying a β-lactamase-fusion protein of choice, the natural product-based immunoreagent tool of competitive sensitivity developed herein for the first time. Since the fusion protein 11B3-scFv-β-lactamase is constructed from a scFv-antibody (11B3) linked to an enzyme (β-lactamase), the step related to the use of secondary antibody in the enzyme-linked immunosorbent assay (ELISA) is completely omitted. Indeed, this fusion protein itself serves both as binding mean of the antigen model and detecting agent, due to the presence of the naturally occurring enzyme. In such a way, it actually affords the one-step TNP-Tris detection reaching a promising LOD value of 45 ± 2 fmol or 157 ± 6 pg/mL. Taken all together, the current protocol does represent much cheaper and significantly less-time consuming alternative compared both to the recombinant antibodies and recombinant phages, previously designed means in our labs for the same purpose.
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Affiliation(s)
- Mladen Simonovic
- Institute of General and Physical Chemistry, IOFH, Belgrade, Serbia
| | - Sanja Ostojic
- Institute of General and Physical Chemistry, IOFH, Belgrade, Serbia
| | - Darko Micic
- Institute of General and Physical Chemistry, IOFH, Belgrade, Serbia
| | | | - Thorsten Mix
- Institute of Biochemistry and Molecular Biology, University of Hamburg, Hamburg, Germany
| | - Miodrag Glumac
- School of Food Science and Biotechnology - SFSB, Food Oral Processing Laboratory, Zhejiang Gongshang University, Hangzhou, People's Republic of China
| | - Boris Pejin
- Institute for Multidisciplinary Research - IMSI, Department of Life Sciences, University of Belgrade, Belgrade, Serbia
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A Fast and Sensitive Luciferase-based Assay for Antibody Engineering and Design of Chimeric Antigen Receptors. Sci Rep 2020; 10:2318. [PMID: 32047180 PMCID: PMC7012821 DOI: 10.1038/s41598-020-59099-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Accepted: 01/15/2020] [Indexed: 12/27/2022] Open
Abstract
Success of immunotherapeutic approaches using genetically engineered antibodies and T cells modified with chimeric antigen receptors (CARs) depends, among other things, on the selection of antigen binding domains with desirable expression and binding characteristics. We developed a luciferase-based assay, termed Malibu-Glo Assay, which streamlines the process of optimization of an antigen binding domain with desirable properties and allows the sensitive detection of tumor antigens. The assay involves a recombinant immunoconjugate, termed Malibu-Glo reagent, comprising an immunoglobulin or a non-immunoglobulin based antigen binding domain genetically linked to a marine luciferase. Malibu-Glo reagent can be conveniently produced in mammalian cells as a secreted protein that retains the functional activity of both the antigen binding domain and the luciferase. Moreover, crude supernatant containing the secreted Malibu-Glo reagent can directly be used for detection of cell surface antigens obviating the laborious steps of protein purification and labeling. We further demonstrate the utility of Malibu-Glo assay for the selection of optimal single chain fragment variables (scFvs) with desired affinity characteristics for incorporation into CARs. In summary, Malibu-Glo assay is a fast, simple, sensitive, specific and economical assay for antigen detection with multiple applications in the fields of antibody engineering, antibody humanization and CAR-T cell therapy.
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Zhang YQ, Xu ZL, Wang F, Cai J, Dong JX, Zhang JR, Si R, Wang CL, Wang Y, Shen YD, Sun Y, Wang H. Isolation of Bactrian Camel Single Domain Antibody for Parathion and Development of One-Step dc-FEIA Method Using VHH-Alkaline Phosphatase Fusion Protein. Anal Chem 2018; 90:12886-12892. [PMID: 30256086 DOI: 10.1021/acs.analchem.8b03509] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A heavy chain variable fragment of heavy chain only antibodies derived from camelids termed VHH shows beneficial characteristics for immunoassay in terms of high sensitivity, outstanding stability and ease in expression. In the present study, we isolated six VHHs from phage display library against parathion, which is a widely used organophosphorus pesticide with high toxicity and persistence. One of six selected VHHs named VHH9, showed highest specificity and superior thermo-stability. A VHH9-alkaline phosphatase (AP) fusion was constructed and used to establish a one-step direct competitive fluorescence enzyme immunoassay (dc-FEIA) with a half maximal inhibitory concentration (IC50) of 1.6 ng/mL and a limit of detection of 0.2 ng/mL which was 4-fold or 3-fold higher sensitivity than direct competitive enzyme-linked immunoassay (dc-ELISA) and indirect competitive enzyme-linked immunoassay (ic-ELISA) for parathion. Furthermore, our assay indicated a 50% reduction on operation time compared with the ic-ELISA method. The presented immunoassay was validated with spiked Chinese cabbage, cucumber, and lettuce samples, and confirmed by UPLC-MS/MS. The results indicated that the VHH-AP-based dc-FEIA is a reproducible detection assay for parathion residues in vegetable samples.
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Affiliation(s)
- Yu-Qi Zhang
- Guangdong Provincial Key Laboratory of Food Quality and Safety, National-Local Joint Engineering Research Center for Processing and Safety Control of Livestock and Poultry Products, College of Food Science , South China Agricultural University , Guangzhou 510642 , P. R. China
| | - Zhen-Lin Xu
- Guangdong Provincial Key Laboratory of Food Quality and Safety, National-Local Joint Engineering Research Center for Processing and Safety Control of Livestock and Poultry Products, College of Food Science , South China Agricultural University , Guangzhou 510642 , P. R. China
| | - Feng Wang
- Guangdong Provincial Key Laboratory of Food Quality and Safety, National-Local Joint Engineering Research Center for Processing and Safety Control of Livestock and Poultry Products, College of Food Science , South China Agricultural University , Guangzhou 510642 , P. R. China
| | - Jun Cai
- Guangdong Provincial Key Laboratory of Food Quality and Safety, National-Local Joint Engineering Research Center for Processing and Safety Control of Livestock and Poultry Products, College of Food Science , South China Agricultural University , Guangzhou 510642 , P. R. China
| | - Jie-Xian Dong
- Department of Entomology and Nematology and UCD Comprehensive Cancer Center , University of California , Davis , California 95616 , United States
- Neurobiology, Physiology & Behavior , University of California , Davis , California 95616 , United States
| | - Jin-Ru Zhang
- Guangdong Provincial Key Laboratory of Food Quality and Safety, National-Local Joint Engineering Research Center for Processing and Safety Control of Livestock and Poultry Products, College of Food Science , South China Agricultural University , Guangzhou 510642 , P. R. China
| | - Rui Si
- Guangdong Provincial Key Laboratory of Food Quality and Safety, National-Local Joint Engineering Research Center for Processing and Safety Control of Livestock and Poultry Products, College of Food Science , South China Agricultural University , Guangzhou 510642 , P. R. China
| | - Cheng-Long Wang
- Guangzhou Institute of Food Inspection , Guangzhou 510080 , P. R. China
| | - Yu Wang
- Guangzhou Institute of Food Inspection , Guangzhou 510080 , P. R. China
| | - Yu-Dong Shen
- Guangdong Provincial Key Laboratory of Food Quality and Safety, National-Local Joint Engineering Research Center for Processing and Safety Control of Livestock and Poultry Products, College of Food Science , South China Agricultural University , Guangzhou 510642 , P. R. China
| | - Yuanming Sun
- Guangdong Provincial Key Laboratory of Food Quality and Safety, National-Local Joint Engineering Research Center for Processing and Safety Control of Livestock and Poultry Products, College of Food Science , South China Agricultural University , Guangzhou 510642 , P. R. China
| | - Hong Wang
- Guangdong Provincial Key Laboratory of Food Quality and Safety, National-Local Joint Engineering Research Center for Processing and Safety Control of Livestock and Poultry Products, College of Food Science , South China Agricultural University , Guangzhou 510642 , P. R. China
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Huo J, Li Z, Wan D, Li D, Qi M, Barnych B, Vasylieva N, Zhang J, Hammock BD. Development of a Highly Sensitive Direct Competitive Fluorescence Enzyme Immunoassay Based on a Nanobody-Alkaline Phosphatase Fusion Protein for Detection of 3-Phenoxybenzoic Acid in Urine. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:11284-11290. [PMID: 30293433 PMCID: PMC6442738 DOI: 10.1021/acs.jafc.8b04521] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
3-Phenoxybenzoic acid (3-PBA) is a human urinary metabolite of many pyrethroid insecticides and can be used as a biomarker to monitor human exposure to these pesticides. A rapid and sensitive direct competitive fluorescence enzyme immunoassay (dc-FEIA) for detecting 3-PBA on the basis of a nanobody (Nb)-alkaline phosphatase (AP) fusion protein was developed. The anti-3-PBA Nb-AP fusion protein was expressed and purified. The 50% inhibitory concentration (IC50) and linear range of dc-FEIA were 0.082 and 0.015-0.447 ng/mL, respectively, with a detection limit of 0.011 ng/mL. The IC50 of dc-FEIA was improved by nearly ten times compared with those of one-step and three-step direct competitive enzyme-linked immunosorbent assay (dc-ELISA). Spiked urine samples were detected by both dc-FEIA and liquid chromatography-mass spectrometry (LC-MS), and the results showed good consistency between the two analysis methods, indicating the reliability of dc-FEIA based on the Nb-AP fusion protein for detecting 3-PBA in urine.
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Affiliation(s)
- Jingqian Huo
- College of Plant Protection, Agricultural University of Hebei, Baoding 071001, P. R. China
- Department of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616
| | - Zhenfeng Li
- Department of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616
| | - Debin Wan
- Department of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616
| | - Dongyang Li
- Department of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616
| | - Meng Qi
- College of Plant Protection, Agricultural University of Hebei, Baoding 071001, P. R. China
| | - Bogdan Barnych
- Department of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616
| | - Natalia Vasylieva
- Department of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616
| | - Jinlin Zhang
- College of Plant Protection, Agricultural University of Hebei, Baoding 071001, P. R. China
- Corresponding author (Tel: +86-0312-7528575; Fax: +86-0312-7528575; )
| | - Bruce D. Hammock
- Department of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616
- Corresponding author (Tel: +86-0312-7528575; Fax: +86-0312-7528575; )
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Erdag B, Balcioglu KB, Bahadir AO, Hinc D, Ibrahimoglu O, Bahar A, Basalp A, Yucel F. Cloning of anti-HBsAg single-chain variable fragments from hybridoma cells for one-step ELISA. BIOTECHNOL BIOTEC EQ 2017. [DOI: 10.1080/13102818.2017.1348256] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Affiliation(s)
- Berrin Erdag
- TUBITAK Marmara Research Center, Genetic Engineering and Biotechnology Institute, Gebze, Kocaeli, Turkey
| | - Koray Bertan Balcioglu
- TUBITAK Marmara Research Center, Genetic Engineering and Biotechnology Institute, Gebze, Kocaeli, Turkey
| | - Aylin Ozdemir Bahadir
- TUBITAK Marmara Research Center, Genetic Engineering and Biotechnology Institute, Gebze, Kocaeli, Turkey
| | - Duygu Hinc
- TUBITAK Marmara Research Center, Genetic Engineering and Biotechnology Institute, Gebze, Kocaeli, Turkey
| | - Ozlem Ibrahimoglu
- TUBITAK Marmara Research Center, Genetic Engineering and Biotechnology Institute, Gebze, Kocaeli, Turkey
| | - Aydin Bahar
- TUBITAK Marmara Research Center, Genetic Engineering and Biotechnology Institute, Gebze, Kocaeli, Turkey
| | - Aynur Basalp
- Sağlık Yüksekokulu, Mehmet Akif Ersoy Üniversitesi, Department of Health Managment, İstiklal Yerleşkesi, Burdur, Turkey
| | - Fatima Yucel
- TUBITAK Marmara Research Center, Genetic Engineering and Biotechnology Institute, Gebze, Kocaeli, Turkey
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8
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Bao RM, Yang HM, Yu CM, Zhang WF, Tang JB. An efficient protocol to enhance the extracellular production of recombinant protein from Escherichia coli by the synergistic effects of sucrose, glycine, and Triton X-100. Protein Expr Purif 2016; 126:9-15. [DOI: 10.1016/j.pep.2016.05.007] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2016] [Revised: 05/11/2016] [Accepted: 05/13/2016] [Indexed: 11/17/2022]
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9
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Grigorenko VG, Andreeva IP, Rubtsova MY, Egorov AM. Recombinant horseradish peroxidase: Production and analytical applications. BIOCHEMISTRY (MOSCOW) 2015; 80:408-16. [DOI: 10.1134/s0006297915040033] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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10
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Development of an efficient signal amplification strategy for label-free enzyme immunoassay using two site-specific biotinylated recombinant proteins. Anal Chim Acta 2015; 859:66-71. [DOI: 10.1016/j.aca.2014.12.020] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2014] [Revised: 12/04/2014] [Accepted: 12/09/2014] [Indexed: 01/12/2023]
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11
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Comparative characterization of recombinant ZZ protein-alkaline phosphatase and its application in enzyme immunoassays. Appl Microbiol Biotechnol 2012; 97:153-8. [PMID: 22851015 DOI: 10.1007/s00253-012-4303-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2012] [Revised: 07/11/2012] [Accepted: 07/12/2012] [Indexed: 12/21/2022]
Abstract
A functional fusion protein, which consists of an antibody and an enzyme that can be used in enzyme immunoassays, has been constructed. However, a quantitative comparison of the characteristics of fusion proteins and chemical conjugates of the parents, which are functionally produced in a uniform microbial system, has not been adequately achieved. In this study, a fusion protein between the ZZ protein and Escherichia coli alkaline phosphatase (AP) and the parental ZZ protein and AP for chemical conjugate was functionally produced in the same bacterial system. A detailed examination of the ZZ-AP fusion protein and the effect of the ZZ-AP chemical conjugate on IgG affinity and enzymatic activity were performed. Compared with the parents, the equilibrium dissociation constant of ZZ-AP conjugate decreased by 32 % and catalytic activity decreased by 24 %, whereas the ZZ-AP fusion retained full parental activities and exhibited an approximately tenfold higher sensitivity than that of ZZ-AP conjugate in enzyme-linked immunosorbent assay. Thus, ZZ-AP fusion is a promising immunoreagent for IgG detection and a potential biolinker between antibodies and reporter enzymes (i.e., IgG-ZZ-AP fusion complex) in immunoassays.
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12
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Xu ZL, Dong JX, Wang H, Li ZF, Beier RC, Jiang YM, Lei HT, Shen YD, Yang JY, Sun YM. Production and characterization of a single-chain variable fragment linked alkaline phosphatase fusion protein for detection of O,O-diethyl organophosphorus pesticides in a one-step enzyme-linked immunosorbent assay. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:5076-83. [PMID: 22533788 DOI: 10.1021/jf300570q] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
A single-chain variable fragment (scFv) linked alkaline phosphatase (AP) fusion protein for detection of O,O-diethyl organophosphorus pesticides (O,O-diethyl OPs) was produced and characterized. The scFv gene was prepared by cloning V(L) and V(H) genes from hybridoma cells secreting monoclonal antibody with broad specificity for O,O-diethyl OPs. The amplified V(L) and V(H) regions were assembled using a linker (Gly(4)Ser)(3) by means of splicing overlap extension polymerase chain reaction to obtain the scFv gene, which was cloned into the expression vector pLIP6/GN containing an AP gene to produce the scFv-AP fusion protein in Escherichia coli strain BL21. The protein was purified by antigen-conjugated immunoaffinity chromatography and characterized by sodium dodecyl sulfate-polyacrylamide gel electrophoresis, Western blotting, and competitive direct enzyme-linked immunosorbent assay (cdELISA). The fusion protein is bifunctional, retaining both antigen binding specificity and AP enzymatic activity. Analysis of spiked and blind river water and Chinese cabbage samples demonstrated that the fusion protein based cdELISA(FP) exhibited good sensitivity and reproducibility.
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Affiliation(s)
- Zhen-Lin Xu
- Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University , Guangzhou 510642, China
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Safarnejad MR, Jouzani GS, Tabatabaie M, Twyman RM, Schillberg S. Antibody-mediated resistance against plant pathogens. Biotechnol Adv 2011; 29:961-71. [DOI: 10.1016/j.biotechadv.2011.08.011] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2011] [Revised: 08/12/2011] [Accepted: 08/12/2011] [Indexed: 02/06/2023]
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14
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Hu H, Yang H, Li D, Wang K, Ruan J, Zhang X, Chen J, Bao C, Ji J, Shi D, Cui D. The potential of magnetic nanocluster and dual-functional protein-based strategy for noninvasive detection of HBV surface antibodies. Analyst 2011; 136:679-83. [DOI: 10.1039/c0an00517g] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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Liu X, Wang H, Liang Y, Yang J, Zhang H, Lei H, Shen Y, Sun Y. Production and Characterization of a Single-Chain Fv Antibody–Alkaline Phosphatase Fusion Protein Specific for Clenbuterol. Mol Biotechnol 2010; 45:56-64. [DOI: 10.1007/s12033-010-9240-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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16
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Lee KW, Hur BU, Song SY, Choi HJ, Shin SH, Cha SH. Methods for rapid identification of a functional single-chain variable fragment using alkaline phosphatase fusion. BMB Rep 2009; 42:731-6. [PMID: 19944014 DOI: 10.5483/bmbrep.2009.42.11.731] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The generation of functional recombinant antibodies from hybridomas is necessary for antibody engineering. However, this is not easily accomplished due to high levels of aberrant heavy and light chain mRNAs, which require a highly selective technology that has proven complicated and difficult to operate. Herein, we attempt to use an alkaline phosphate (AP)-fused form of single-chain variable fragment (scFv) for the simple identification of a hybridoma-derived, functional recombinant antibody. As a representative example, we cloned the scFv gene from a hybridoma-producing mouse IgG against branched-chain keto acid dehydrogenase complex-E2 (BCKD-E2) into an expression vector containing an in-frame phoA gene. Functional recombinant antibodies were easily identified by conventional enzyme-linked immunosorbent assay (ELISA) by employing scFv-AP fusion protein, which also readily serves as a valuable immuno-detective reagent.
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Affiliation(s)
- Kyung-Woo Lee
- Division of Molecular & Medical Biotechnology, College of Bioscience and Biotechnology, Kangwon National University, Chuncheon, Korea
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de Marco A. Strategies for successful recombinant expression of disulfide bond-dependent proteins in Escherichia coli. Microb Cell Fact 2009; 8:26. [PMID: 19442264 PMCID: PMC2689190 DOI: 10.1186/1475-2859-8-26] [Citation(s) in RCA: 253] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2009] [Accepted: 05/14/2009] [Indexed: 12/22/2022] Open
Abstract
Bacteria are simple and cost effective hosts for producing recombinant proteins. However, their physiological features may limit their use for obtaining in native form proteins of some specific structural classes, such as for instance polypeptides that undergo extensive post-translational modifications. To some extent, also the production of proteins that depending on disulfide bridges for their stability has been considered difficult in E. coli. Both eukaryotic and prokaryotic organisms keep their cytoplasm reduced and, consequently, disulfide bond formation is impaired in this subcellular compartment. Disulfide bridges can stabilize protein structure and are often present in high abundance in secreted proteins. In eukaryotic cells such bonds are formed in the oxidizing environment of endoplasmic reticulum during the export process. Bacteria do not possess a similar specialized subcellular compartment, but they have both export systems and enzymatic activities aimed at the formation and at the quality control of disulfide bonds in the oxidizing periplasm. This article reviews the available strategies for exploiting the physiological mechanisms of bactera to produce properly folded disulfide-bonded proteins.
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Affiliation(s)
- Ario de Marco
- Cogentech, IFOM-IEO Campus for Oncogenomic, via Adamello, 16 - 20139, Milano, Italy.
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18
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Antibody Phage Display. SPRINGER PROTOCOLS HANDBOOKS 2008. [PMCID: PMC7123299 DOI: 10.1007/978-1-60327-375-6_34] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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19
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Mousli M, Turki I, Kharmachi H, Saadi M, Dellagi K. Recombinant single-chain Fv antibody fragment–alkaline phosphatase conjugate: A novel in vitro tool to estimate rabies viral glycoprotein antigen in vaccine manufacture. J Virol Methods 2007; 146:246-56. [PMID: 17845821 DOI: 10.1016/j.jviromet.2007.07.015] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2007] [Revised: 07/02/2007] [Accepted: 07/09/2007] [Indexed: 10/22/2022]
Abstract
The purpose of this study was to design a novel in vitro tool by using recombinant protein technology to qualify the whole reagent preparation procedure, to be used to quantify rabies viral antigen preparation in a simple and rapid format for potency control of rabies vaccines. 50AD1 is a neutralizing monoclonal antibody directed against the rabies virus glycoprotein that binds to native conformational antigenic site III. In the present study, the DNA fragments encoding the variable domains of 50AD1 were inserted into a prokaryotic expression vector so as to produce a single-chain Fv antibody fragment (scFv) genetically fused to the bacterial alkaline phosphatase (AP). The recombinant fusion protein preserved both the AP enzymatic activity and the antigen-binding activity against the rabies virus glycoprotein nearly identical to the parental antibody, and was used successfully in different assays including ELISA, dot-blot and cell culture tests. The present study shows that the genetic fusion protein provides a new tool for one-step rabies virus immunodetection, which can be produced in homogeneous bifunctional reagent, easily, quickly and reproducibly. In addition, this recombinant immunoconjugate is a promising alternative reagent for applications involving immunodetection, it presents a similar sensitivity and specificity to that obtained with classical reagents.
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Affiliation(s)
- Mohamed Mousli
- Laboratoire d'Immunopathologie, Vaccinologie et Génétique Moléculaire, Institut Pasteur de Tunis, 13 Place Pasteur BP74, 1002 Tunis-Belvédère, Tunisia.
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Lim DV, Simpson JM, Kearns EA, Kramer MF. Current and developing technologies for monitoring agents of bioterrorism and biowarfare. Clin Microbiol Rev 2005; 18:583-607. [PMID: 16223949 PMCID: PMC1265906 DOI: 10.1128/cmr.18.4.583-607.2005] [Citation(s) in RCA: 218] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Recent events have made public health officials acutely aware of the importance of rapidly and accurately detecting acts of bioterrorism. Because bioterrorism is difficult to predict or prevent, reliable platforms to rapidly detect and identify biothreat agents are important to minimize the spread of these agents and to protect the public health. These platforms must not only be sensitive and specific, but must also be able to accurately detect a variety of pathogens, including modified or previously uncharacterized agents, directly from complex sample matrices. Various commercial tests utilizing biochemical, immunological, nucleic acid, and bioluminescence procedures are currently available to identify biological threat agents. Newer tests have also been developed to identify such agents using aptamers, biochips, evanescent wave biosensors, cantilevers, living cells, and other innovative technologies. This review describes these current and developing technologies and considers challenges to rapid, accurate detection of biothreat agents. Although there is no ideal platform, many of these technologies have proved invaluable for the detection and identification of biothreat agents.
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Affiliation(s)
- Daniel V Lim
- Department of Biology, Center for Biological Defense, University of South Florida, Tampa, FL 33620-5200, USA.
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Alcalá P, Ferrer-Miralles N, Villaverde A. Engineering of Escherichia coli beta-galactosidase for solvent display of a functional scFv antibody fragment. FEBS Lett 2003; 533:115-8. [PMID: 12505169 DOI: 10.1016/s0014-5793(02)03775-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Protein engineering allows the generation of hybrid polypeptides with functional domains from different origins and therefore exhibiting new biological properties. We have explored several permissive sites in Escherichia coli beta-galactosidase to generate functional hybrid enzymes displaying a mouse scFv antibody fragment. When this segment was placed at the amino-terminus of the enzyme, the whole fusion protein was stable, maintained its specific activity and interacted specifically with the target antigen, a main antigenic determinant of foot-and-mouth disease virus. In addition, the antigen-targeted enzyme was enzymatically active when bound to the antigen and therefore useful as a reagent in single-step immunoassays. These results prove the flexibility of E. coli beta-galactosidase as a carrier for large-sized functional domains with binding properties and prompt the further exploration of the biotechnological applicability of the scFv enzyme targeting principle for diagnosis or other biomedical applications involving antigen tagging.
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Affiliation(s)
- Pilar Alcalá
- Institut de Biotecnologia i de Biomedicina and Departament de Genètica i de Microbiologia, Universitat Autònoma de Barcelona, Bellaterra, 08193, Barcelona, Spain
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