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Master's Dissertation
DOI
https://doi.org/10.11606/D.9.2013.tde-25032014-105024
Document
Author
Full name
Adriana Del Monaco de Maria
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2013
Supervisor
Committee
Hirata, Mario Hiroyuki (President)
Carvalho, Cristiane Rodrigues Guzzo
Cunha, Rodrigo Luiz Oliveira Rodrigues
Title in Portuguese
Subclonagem, expressão e purificação da enzima hialuronidase-1, variante 8, humana
Keywords in Portuguese
Biologia molecular
Hialuronidase
Plamídeo sintético
Sub-clonagem
Abstract in Portuguese
O Ácido Hialurônico, HA, é um dos principais componentes da matriz extracelular dos vertebrados. É um glicosaminoglicano hidrolisado pelas enzimas da família da Hialuronidase, envolvidas na regulação de importantes processos biológicos, como a permeabilidade vascular e a angiogênese. Conforme o interesse pelo desenvolvimento de uma rota de síntese para esta enzima, objetivamos a obtenção de um plasmídeo, contendo a sequência que codifica a variante 8 do gene Hyal-1. Para isto, planejou-se a inserção de dois sítios de restrição para a sub-clonagem, sítio dirigida, BamH-1 na região 5' e Not-1 na 3' na sequência do códon da Hyal-1. O inserto foi sub-clonado no plasmídeo, pET28-a, e transfectado para expressão em Escherichia coli Bl-21. A expressão foi induzida por IPTG no melhor tempo, de 4 horas, e a confirmação da expressão protéica foi realizada por Western blotting. Observou-se uma proteína de 45 kDa, confirmando a presença da Hyal-1. Realizou-se a expressão em 4 litros de cultura para obtenção de uma quantia suficiente para purificação em coluna de níquel-agarose. O rendimento neste experimento foi de 25µg por litro. A rota sintética sugerida neste estudo mostrou-se eficiente para obtenção da proteína Hyal-1 recombinante, justificando futuros investimentos na otimização deste processo
Title in English
Subcloning, expression and purification of human hialuronidase-1, variant 8
Keywords in English
Hyaluronidase
Molecular biology
Sintetic plasmid
Subcloning
Abstract in English
Hyaluronic Acid, HA is a major component of the extracellular matrix of vertebrates. It is a glycosaminoglycan hydrolyzed by enzymes of the hyaluronidase family, involved in the regulation of important biological processes such as angiogenesis and vascular permeability. As interest in the development of a synthesis route for this enzyme, we aim to obtain a plasmid containing the coding sequence of the gene variant 8 Hyal-1. To obtain the plasmid insert was planned and two restriction sites for sub-cloning site directed at the 5' Bam H-1 and 3' Not-1 in codon sequence of Hyal-1. The insert was sub-cloned into plasmid pET28-a, and transfected for expression in Escherichia coli Bl-21. The expression was induced by IPTG in the best time of 4 hours and confirmation of protein expression was performed by Western blotting. There was a 45 kDa protein, thus confirming the presence of Hyal-1. Purification was performed on nickel-agarose column to obtain a larger amount of the protein, approximately 25µg/L. The route suggested in this study was efficient attainment of Hyal-1 recombinant protein.
 
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Publishing Date
2014-04-01
 
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