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Marivate A, Njengele-Tetyana Z, Fish MQ, Mosebi S. Recombinant expression, purification, and characterization of full-length human BST-2 from Escherichia coli. Protein Expr Purif 2021; 188:105969. [PMID: 34500069 DOI: 10.1016/j.pep.2021.105969] [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: 05/21/2021] [Revised: 08/20/2021] [Accepted: 09/05/2021] [Indexed: 11/25/2022]
Abstract
HIV-1 virus release from infected cells is blocked by human BST-2, but HIV-1 Vpu efficiently antagonises BST-2 due to direct transmembrane domain interactions that occur between each protein. Targeting the interaction between these two proteins is seen as viable for HIV-1 antiviral intervention. This study describes the successful over-expression and purification of a recombinant full-length human BST-2 from inclusion bodies using affinity and anion exchange chromatography. Two milligrams of purified full-length BST-2 were produced per litre of BL21 (DE3) T7 Express® pLysY E. coli culture. Far-UV circular dichroism validated the renaturing of the recombinant protein and retention of its secondary structure. Furthermore, through ELISA, a known human BST-2 binding partner, HIV-1 Vpu, was shown to bind to the renatured and purified protein, further validating its folding. To our knowledge this is the first report of the purification of a wild-type, full-length human BST-2 from Escherichia coli.
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Affiliation(s)
- Amukelani Marivate
- Biomedical Group, Advanced Materials Division, Mintek, Randburg, 2125, South Africa.
| | | | - Muhammad Qasim Fish
- Biomedical Group, Advanced Materials Division, Mintek, Randburg, 2125, South Africa
| | - Salerwe Mosebi
- Department of Life and Consumer Sciences, College of Agriculture and Environmental Sciences, University of South Africa, Private Bag X6, Florida, 1710, South Africa
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2
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Construction, expression and purification of a novel CadF-based multiepitope antigen and its immunogenic polyclonal antibody specific to Campylobacter jejuni and Campylobacter coli. Protein Expr Purif 2021; 180:105818. [PMID: 33418060 DOI: 10.1016/j.pep.2021.105818] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 11/25/2020] [Accepted: 12/30/2020] [Indexed: 11/24/2022]
Abstract
Campylobacteriosis is a disease in humans caused by the infection from Campylobacter spp. Human cases are mainly due to Campylobacter jejuni, although C. coli can cause gastroenteritis in humans as well. The bacteria are commensal in chicken tract and can be contaminated into chicken products during processing. Obviously, detecting reagents such as a specific antibody is essential for the development of immune-based detection methods for C. jejuni or C. coli. In this study, in silico techniques were used to design a chimeric recombinant antigen, named multiepitope antigen (MEA), for the production of specific polyclonal antibody. To design MEA polypeptide based on C. jejuni fibronectin-binding protein or CadF, four conserved and unique antigenic peptides were identified and fused together directly. The C. jejuni CadF-based MEA polypeptide fused with two single six-histidine tags at both C- and N-terminal ends was expressed under Escherichia coli expression system. The recombinant MEA was successfully produced and purified by Ni-NTA resin with a high satisfactory yield. Indirect ELISA results showed that anti-MEA polyclonal antibody derived from rabbit serum had a titer of 16,000, indicating high antigenicity of MEA polypeptide. Dot blot results also confirmed that the produced anti-MEA antibody could specifically recognize both C. jejuni and C. coli whole cells as expected while there was no cross-reactivity to non-Campylobacter spp. tested in this study.
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3
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Langarizadeh MA, Abiri A, Ghasemshirazi S, Foroutan N, Khodadadi A, Faghih-Mirzaei E. Phlorotannins as HIV Vpu inhibitors, an in silico virtual screening study of marine natural products. Biotechnol Appl Biochem 2020; 68:918-926. [PMID: 32860447 DOI: 10.1002/bab.2014] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Accepted: 08/26/2020] [Indexed: 12/22/2022]
Abstract
The importance of new effective treatment methodologies for human immunodeficiency virus (HIV) is undeniable for the medical society. Viral protein U (Vpu), one of the disparaged accessory proteins of HIV, is responsible for the dissemination of viral particles, and HIV mutants lacking Vpu protein have remarkably reduced pathogenicity. Here, we explored the marine natural products to find the leading structures which can potentially inhibit the activity of Vpu in silico. To fulfill this goal, we set up a virtual screening based on molecular docking to evaluate the binding capacity of different marine products to Vpu. For validation, we used molecular dynamics simulation and monitored the root mean square deviation value and binding interactions. The results were intriguing when we realized that the hit compounds (phlorotannins) had previously been identified as reverse transcriptase and HIV protease inhibitors. This research inaugurates a new road to combat HIV by multifaceted mode of action of these marine natural products without putting the normal cells in jeopardy (with their safe toxicological profile).
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Affiliation(s)
- Mohammad Amin Langarizadeh
- Student Research Committee, Kerman University of Medical Sciences, Kerman, Iran.,Department of Medicinal Chemistry, Faculty of Pharmacy, Kerman University of Medical Sciences, Kerman, Iran
| | - Ardavan Abiri
- Student Research Committee, Kerman University of Medical Sciences, Kerman, Iran.,Department of Medicinal Chemistry, Faculty of Pharmacy, Kerman University of Medical Sciences, Kerman, Iran
| | - Saeid Ghasemshirazi
- Department of Computer Engineering, Shahid Bahonar University of Kerman, Kerman, Iran
| | - Nazanin Foroutan
- Pharmaceutics Research Center, Faculty of Pharmacy, Kerman University of Medical Sciences, Kerman, Iran
| | - Arash Khodadadi
- Department of Medicinal Chemistry, Faculty of Pharmacy, Kerman University of Medical Sciences, Kerman, Iran
| | - Ehsan Faghih-Mirzaei
- Department of Medicinal Chemistry, Faculty of Pharmacy, Kerman University of Medical Sciences, Kerman, Iran
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4
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Rashamuse TJ, Njengele Z, Coyanis EM, Sayed Y, Mosebi S, Bode ML. Design, synthesis and biological evaluation of novel 2-(5-aryl-1H-imidazol-1-yl) derivatives as potential inhibitors of the HIV-1 Vpu and host BST-2 protein interaction. Eur J Med Chem 2020; 190:112111. [PMID: 32058240 DOI: 10.1016/j.ejmech.2020.112111] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 01/17/2020] [Accepted: 01/31/2020] [Indexed: 02/07/2023]
Abstract
Novel ethyl 2-(5-aryl-1H-imidazol-1-yl)-acetates 17 and propionates 18, together with their acetic acid 19 and acetohydrazide 20 derivatives, were designed and synthesized using TosMIC chemistry. Biological evaluation of these newly synthesized scaffolds in the HIV-1 Vpu- Host BST-2 ELISA assay identified seven hits (17a, 17b, 17c, 17g, 18a, 20f and 20g) with greater than 50% inhibitory activity. These hits were validated in the HIV-1 Vpu- Host BST-2 AlphaScreen™ and six of the seven compounds were found to have comparable percentage inhibitory activities to those of the ELISA assay. Compounds 17b and 20g, with consistent percentage inhibitory activities across the two assays, had IC50 values of 11.6 ± 1.1 μM and 17.6 ± 0.9 μM in a dose response AlphaScreen™ assay. In a cell-based HIV-1 antiviral assay, compound 17b exhibited an EC50 = 6.3 ± 0.7 μM at non-toxic concentrations (CC50 = 184.5 ± 0.8 μM), whereas compound 20g displayed antiviral activity roughly equivalent to its toxicity (CC50 = 159.5 ± 0.9 μM). This data suggests that compound 17b, active in both cell-based and biochemical assays, provides a good starting point for the design of possible lead compounds for prevention of HIV-1 Vpu and host BST-2 protein binding in new anti-HIV therapeutics.
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Affiliation(s)
- Thompho J Rashamuse
- Centre for Metal-based Drug Discovery, Advanced Materials Division, Mintek, 200 Malibongwe Drive, Randburg, 2125, South Africa; Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Private Bag 3, PO WITS, 2050, South Africa
| | - Zikhona Njengele
- Centre for Metal-based Drug Discovery, Advanced Materials Division, Mintek, 200 Malibongwe Drive, Randburg, 2125, South Africa; Protein Structure-Function Research Unit, School of Molecular and Cell Biology, University of the Witwatersrand, Johannesburg, 2050, South Africa
| | - E Mabel Coyanis
- Centre for Metal-based Drug Discovery, Advanced Materials Division, Mintek, 200 Malibongwe Drive, Randburg, 2125, South Africa
| | - Yasien Sayed
- Protein Structure-Function Research Unit, School of Molecular and Cell Biology, University of the Witwatersrand, Johannesburg, 2050, South Africa
| | - Salerwe Mosebi
- Department of Life and Consumer Sciences, College of Agriculture and Environmental Sciences, University of South Africa, Private Bag X6, Florida, 1710, South Africa.
| | - Moira L Bode
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Private Bag 3, PO WITS, 2050, South Africa.
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Pawar AD, Verma D, Sankeshi V, Raman R, Sharma Y. Strategizing for the purification of a multiple Big domain-containing protein in native conformation is worth it! Protein Expr Purif 2017; 145:25-31. [PMID: 29287899 DOI: 10.1016/j.pep.2017.12.008] [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: 08/21/2017] [Revised: 12/15/2017] [Accepted: 12/21/2017] [Indexed: 11/30/2022]
Abstract
The reliability and accuracy of conformational or functional studies of any novel multidomain protein rely on the quality of protein. The bottleneck in structural studies with the complete Big_2 domain containing proteins like LigA, LigB or MpIBP is usually their large molecular size owing to their multidomain (>10-12 domains) architectures. Interestingly, a soil bacterium Paenarthrobacter aurescens TC1, harbours a gene that encodes a protein comprising of four predicted Big_2 domains. We report here the expression and purification of this novel, multiple Big_2 domains containing protein, Arig of P. aurescens TC1. During overexpression, recombinant Arig formed inclusion bodies and hence was purified by on-column refolding. The refolded Arig revealed a β-sheet conformation and a well-resolved near-UV CD spectra but did not exhibit a well-dispersed 2D [1H-15N]-HSQC NMR spectrum, as expected for a well-folded β-sheet native conformation. We, therefore, further optimized Arig overexpression in the soluble fraction by including osmolytes. CD spectroscopic and 2D [1H-15N]-HSQC analyses consolidate that Arig purified alternatively has a well-folded native conformation. While we describe different strategies for purification of Arig, we also present the spectral properties of this novel all-β-sheet protein.
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Affiliation(s)
- Asmita D Pawar
- CSIR-Centre for Cellular and Molecular Biology (CCMB), Uppal Road, Hyderabad 500 007, India.
| | - Deepshikha Verma
- Department of Chemical Sciences, Tata Institute of Fundamental Research, 1, Homi Bhabha Road, Colaba, Mumbai, 400005, India
| | - Venu Sankeshi
- CSIR-Centre for Cellular and Molecular Biology (CCMB), Uppal Road, Hyderabad 500 007, India
| | - Rajeev Raman
- CSIR-Centre for Cellular and Molecular Biology (CCMB), Uppal Road, Hyderabad 500 007, India
| | - Yogendra Sharma
- CSIR-Centre for Cellular and Molecular Biology (CCMB), Uppal Road, Hyderabad 500 007, India; Academy of Scientific and Innovative Research (AcSIR), New Delhi, India
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Zhang Y, Liang Y, Qiu D, Yuan J, Yang X. Comparison of cerato-platanin family protein BcSpl1 produced in Pichia pastoris and Escherichia coli. Protein Expr Purif 2017; 136:20-26. [PMID: 28606662 DOI: 10.1016/j.pep.2017.06.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Revised: 05/20/2017] [Accepted: 06/08/2017] [Indexed: 12/31/2022]
Abstract
The Botrytis cinerea BcSpl1 protein is a member of the cerato-platanin family, and consists of 137 amino acids and two disulfide bridges. This protein induces the onset of necrosis in infiltrated plant hosts. Recombinant BcSpl1 proteins produced in Pichia pastoris (pBcSpl1) and Escherichia coli (eBcSpl1) were initially compared regarding their abilities to induce necrosis and systemic acquired resistance (SAR). The pBcSpl1 and eBcSpl1 treatments led to the development of necrotic lesions on tomato leaves, and provided tomato plants with SAR to B. cinerea. The lesion area of leaves infiltrated with the BcSpl1 proteins decreased by 22.7% (pBcSpl1) and 21.8% (eBcSpl1). Additionally, eBcSpl1 up-regulated the expression levels of some defense-related genes, including PR-1a, prosystemin, PI I, and PI II, as well as SIPK and TPK1b, which encode two protein kinases. Furthermore, eBcSpl1 exhibited chitin-binding properties. Our data revealed that the E. coli expression system produces higher BcSpl1 yields than the P. pastoris system. This high-yield expression of BcSpl1 may be relevant for future large-scale applications of this elicitor to improve crop production.
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Affiliation(s)
- Yi Zhang
- The State Key Laboratory for Biology of Plant Disease and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, No. 12 Zhong-guan-cun South Street, Beijing 100081, China
| | - Yingbo Liang
- The State Key Laboratory for Biology of Plant Disease and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, No. 12 Zhong-guan-cun South Street, Beijing 100081, China
| | - Dewen Qiu
- The State Key Laboratory for Biology of Plant Disease and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, No. 12 Zhong-guan-cun South Street, Beijing 100081, China
| | - Jingjing Yuan
- The State Key Laboratory for Biology of Plant Disease and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, No. 12 Zhong-guan-cun South Street, Beijing 100081, China
| | - Xiufen Yang
- The State Key Laboratory for Biology of Plant Disease and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, No. 12 Zhong-guan-cun South Street, Beijing 100081, China.
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