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Generoso WC, Brinek M, Dietz H, Oreb M, Boles E. Secretion of 2,3-dihydroxyisovalerate as a limiting factor for isobutanol production in Saccharomyces cerevisiae. FEMS Yeast Res 2017; 17:3821180. [DOI: 10.1093/femsyr/fox029] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2017] [Accepted: 05/11/2017] [Indexed: 01/23/2023] Open
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Generoso WC, Gottardi M, Oreb M, Boles E. Simplified CRISPR-Cas genome editing for Saccharomyces cerevisiae. J Microbiol Methods 2016; 127:203-205. [DOI: 10.1016/j.mimet.2016.06.020] [Citation(s) in RCA: 101] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Revised: 06/14/2016] [Accepted: 06/16/2016] [Indexed: 11/25/2022]
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Urbaczek AC, Ximenes VF, Afonso A, Generoso WC, Nogueira CT, Tansini A, Cappelini LTD, Malagó Júnior W, da Silva FH, da Fonseca LM, da Costa PI. Recombinant hepatitis C virus-envelope protein 2 interactions with low-density lipoprotein/CD81 receptors. Mem Inst Oswaldo Cruz 2015; 110:534-42. [PMID: 26018451 PMCID: PMC4501418 DOI: 10.1590/0074-02760140441] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 11/23/2014] [Accepted: 03/20/2015] [Indexed: 02/08/2023] Open
Abstract
Hepatitis C virus (HCV) envelope protein 2 (E2) is involved in viral binding to host cells. The aim of this work was to produce recombinant E2B and E2Y HCV proteins in Escherichia coli and Pichia pastoris, respectively, and to study their interactions with low-density lipoprotein receptor (LDLr) and CD81 in human umbilical vein endothelial cells (HUVEC) and the ECV304 bladder carcinoma cell line. To investigate the effects of human LDL and differences in protein structure (glycosylated or not) on binding efficiency, the recombinant proteins were either associated or not associated with lipoproteins before being assayed. The immunoreactivity of the recombinant proteins was analysed using pooled serum samples that were either positive or negative for hepatitis C. The cells were immunophenotyped by LDLr and CD81 using flow cytometry. Binding and binding inhibition assays were performed in the presence of LDL, foetal bovine serum (FCS) and specific antibodies. The results revealed that binding was reduced in the absence of FCS, but that the addition of human LDL rescued and increased binding capacity. In HUVEC cells, the use of antibodies to block LDLr led to a significant reduction in the binding of E2B and E2Y. CD81 antibodies did not affect E2B and E2Y binding. In ECV304 cells, blocking LDLr and CD81 produced similar effects, but they were not as marked as those that were observed in HUVEC cells. In conclusion, recombinant HCV E2 is dependent on LDL for its ability to bind to LDLr in HUVEC and ECV304 cells. These findings are relevant because E2 acts to anchor HCV to host cells; therefore, high blood levels of LDL could enhance viral infectivity in chronic hepatitis C patients.
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Affiliation(s)
- Ana Carolina Urbaczek
- Departamento de Análises Clínicas, Faculdade de Ciências Farmacêuticas de Araraquara, Universidade Estadual Paulista, Bauru, SP, Brasil
| | - Valdecir Farias Ximenes
- Departamento de Química, Faculdade de Ciências, Universidade Estadual Paulista, Bauru, SP, Brasil
| | - Ana Afonso
- Unidade de Parasitologia Médica e Microbiologia,, Instituto de Higiene e Medicina Tropical, Universidade Nova de Lisboa, Lisboa, Portugal
| | - Wesley Cardoso Generoso
- Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos, SP, Brasil
| | - Camila Tita Nogueira
- Departamento de Análises Clínicas, Faculdade de Ciências Farmacêuticas de Araraquara, Universidade Estadual Paulista, Bauru, SP, Brasil
| | - Aline Tansini
- Departamento de Análises Clínicas, Faculdade de Ciências Farmacêuticas de Araraquara, Universidade Estadual Paulista, Bauru, SP, Brasil
| | - Luciana Teresa Dias Cappelini
- Departamento de Química e Física Molecular, Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos, SP, Brasil
| | - Wilson Malagó Júnior
- Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos, SP, Brasil
| | | | - Luiz Marcos da Fonseca
- Departamento de Análises Clínicas, Faculdade de Ciências Farmacêuticas de Araraquara, Universidade Estadual Paulista, Bauru, SP, Brasil
| | - Paulo Inácio da Costa
- Departamento de Análises Clínicas, Faculdade de Ciências Farmacêuticas de Araraquara, Universidade Estadual Paulista, Bauru, SP, Brasil
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Urbaczek AC, Ribeiro LCDA, Ximenes VF, Afonso A, Nogueira CT, Generoso WC, Alberice JV, Rudnicki M, Ferrer R, da Fonseca LM, da Costa PI. Inflammatory response of endothelial cells to hepatitis C virus recombinant envelope glycoprotein 2 protein exposure. Mem Inst Oswaldo Cruz 2014; 109:748-56. [PMID: 25317702 PMCID: PMC4238766 DOI: 10.1590/0074-0276140090] [Citation(s) in RCA: 10] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Accepted: 07/29/2014] [Indexed: 12/12/2022] Open
Abstract
The hepatitis C virus (HCV) encodes approximately 10 different structural and non-structural proteins, including the envelope glycoprotein 2 (E2). HCV proteins, especially the envelope proteins, bind to cell receptors and can damage tissues. Endothelial inflammation is the most important determinant of fibrosis progression and, consequently, cirrhosis. The aim of this study was to evaluate and compare the inflammatory response of endothelial cells to two recombinant forms of the HCV E2 protein produced in different expression systems (Escherichia coli and Pichia pastoris). We observed the induction of cell death and the production of nitric oxide, hydrogen peroxide, interleukin-8 and vascular endothelial growth factor A in human umbilical vein endothelial cells (HUVECs) stimulated by the two recombinant E2 proteins. The E2-induced apoptosis of HUVECs was confirmed using the molecular marker PARP. The apoptosis rescue observed when the antioxidant N-acetylcysteine was used suggests that reactive oxygen species are involved in E2-induced apoptosis. We propose that these proteins are involved in the chronic inflammation caused by HCV.
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Affiliation(s)
- Ana Carolina Urbaczek
- Laboratório de Imunologia Clínica, Departamento de Análises Clínicas,
Escola de Ciências Farmacêuticas, Bauru, SP, Brasil
| | | | - Valdecir Farias Ximenes
- Departamento de Química, Faculdade de Ciências, Universidade Estadual
Paulista Julio de Mesquita Filho, Bauru, SP, Brasil
| | - Ana Afonso
- Departamento de Parasitologia Médica, Unidade de Parasitologia Médica e
Microbiologia, Instituto de Higiene e Medicina Tropcal, Universidade Nova de Lisboa,
Lisboa, Portugal
- Departamento de Morfologia e Patologia, Universidade Federal de São
Carlos, São Carlos, SP, Brasil
- Grupo de Bioanalítica, Microfabricações e Separações, Departamento de
Química e Física Molecular, Instituto de Química de São Carlos, Universidade de São
Paulo, São Carlos, SP, Brasil
| | - Camila Tita Nogueira
- Laboratório de Imunologia Clínica, Departamento de Análises Clínicas,
Escola de Ciências Farmacêuticas, Bauru, SP, Brasil
| | - Wesley Cardoso Generoso
- Departamento de Genética e Evolução, Universidade Federal de São
Carlos, São Carlos, SP, Brasil
| | - Juliana Vieira Alberice
- Grupo de Bioanalítica, Microfabricações e Separações, Departamento de
Química e Física Molecular, Instituto de Química de São Carlos, Universidade de São
Paulo, São Carlos, SP, Brasil
| | - Martina Rudnicki
- Escola de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo,
SP, Brasil
| | - Renila Ferrer
- Escola de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo,
SP, Brasil
| | - Luiz Marcos da Fonseca
- Laboratório de Imunologia Clínica, Departamento de Análises Clínicas,
Escola de Ciências Farmacêuticas, Bauru, SP, Brasil
| | - Paulo Inácio da Costa
- Laboratório de Imunologia Clínica, Departamento de Análises Clínicas,
Escola de Ciências Farmacêuticas, Bauru, SP, Brasil
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Generoso WC, Malagó W, Pereira N, Henrique-Silva F. Recombinant expression and characterization of an endoglucanase III (cel12a) from Trichoderma harzianum (Hypocreaceae) in the yeast Pichia pastoris. Genet Mol Res 2012; 11:1544-57. [PMID: 22653604 DOI: 10.4238/2012.may.21.11] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Filamentous fungi from the genus Trichoderma have been widely investigated due to their considerable production of important biotechnological enzymes. Previous studies have demonstrated that the T. harzianum strain IOC-3844 has a high degree of cellulolytic activity. After excluding the native signal peptide, the open reading frame of the T. harzianum endoglucanase III enzyme was cloned in the expression vector pPICZαA, enabling protein secretion to the culture medium. The recombinant plasmid was used to transform Pichia pastoris. Recombinant expression in the selected clone yielded 300 mg pure enzyme per liter of induced medium. The recombinant enzyme proved to be active in a qualitative analysis using Congo red. A quantitative assay, using dinitrosalicylic acid, revealed a high degree of activity at pH 5.5 and around 48°C. This information contributes to our understanding of the cellulolytic repertory of T. harzianum and the determination of a set of enzymes that can be incorporated into mixes for second-generation ethanol production.
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Affiliation(s)
- W C Generoso
- Laboratório de Biologia Molecular, Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos, SP, Brasil
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Vizoná Liberato M, Cardoso Generoso W, Malagó W, Henrique-Silva F, Polikarpov I. Crystallization and preliminary X-ray diffraction analysis of endoglucanase III from Trichoderma harzianum. Acta Crystallogr Sect F Struct Biol Cryst Commun 2012; 68:306-9. [PMID: 22442229 PMCID: PMC3310537 DOI: 10.1107/s1744309112000838] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [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: 09/20/2011] [Accepted: 01/09/2012] [Indexed: 11/06/2023]
Abstract
Endoglucanases are enzymes that hydrolyze cellulose and are important components of the cellulolytic complex. In contrast to other members of the complex, they cleave internal β-1,4-glycosidic bonds in the cellulose polymer, allowing cellulose to be used as an energy source. Since biomass is an important renewable source of energy, the structural and functional characterization of these enzymes is of interest. In this study, endoglucanase III from Trichoderma harzianum was produced in Pichia pastoris and purified. Crystals belonging to the orthorhombic space group P2(1)2(1)2(1), with unit-cell parameters a = 47.54, b = 55.57, c = 157.3 Å, were obtained by the sitting-drop vapour-diffusion method and an X-ray diffraction data set was collected to 2.07 Å resolution.
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Affiliation(s)
- Marcelo Vizoná Liberato
- Instituto de Física de São Carlos, Universidade de São Paulo, Avenida Trabalhador Sãocarlense 400, 13566-590 São Carlos-SP, Brazil
| | - Wesley Cardoso Generoso
- Departamento de Genética e Evolução, Universidade Federal de São Carlos, Rodovia Washington Luís, km. 235, 13565-905 São Carlos-SP, Brazil
| | - Wilson Malagó
- Departamento de Genética e Evolução, Universidade Federal de São Carlos, Rodovia Washington Luís, km. 235, 13565-905 São Carlos-SP, Brazil
| | - Flávio Henrique-Silva
- Departamento de Genética e Evolução, Universidade Federal de São Carlos, Rodovia Washington Luís, km. 235, 13565-905 São Carlos-SP, Brazil
| | - Igor Polikarpov
- Instituto de Física de São Carlos, Universidade de São Paulo, Avenida Trabalhador Sãocarlense 400, 13566-590 São Carlos-SP, Brazil
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