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Doctoral Thesis
DOI
https://doi.org/10.11606/T.87.2016.tde-04012016-073001
Document
Author
Full name
Mariana Rangel Pereira
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2015
Supervisor
Committee
Lemos, Eliana Gertrudes Macedo (President)
Araujo, Welington Luiz de
Desidério, Janete Apparecida
Gomes, Eleni
Silva, Luiziana Ferreira da
Title in Portuguese
Caracterização funcional e estrutural de enzimas lipolíticas de um consórcio microbiano degradador de óleo diesel.
Keywords in Portuguese
Consórcio microbiano
Esterase
Lipase
Metagenoma
Abstract in Portuguese
O comércio mundial de enzimas industriais estava estimado em 2.3 bilhões de dólares entre detergentes (U$ 789 milhões), aplicações alimentícias (U$ 634 milhões), agricultura (U$ 237 milhões), entre outros. Neste contexto, as enzimas lipolíticas estão atraindo enorme atenção devido ao seu potencial biotecnológico, visto que estas podem catalisar múltiplas reações (hidrólise, acidólise, interesterificação e glicerólise). Enzimas lipolíticas de origem microbiana são economicamente atrativas por serem biodegradáveis, atuarem normalmente em condições brandas, e serem quimio-seletivas propiciando à indústria farmacêutica a obtenção de drogas com efeito colateral reduzido. Neste projeto, quatro genes potenciais codificadores de esterases/lipases, advindos de uma biblioteca metagenômica de um consórcio microbiano degradador de óleo diesel, foram clonados em vetores de expressão e expressos em Escherichia coli BL21 (DE3), e as proteínas correspondentes foram submetidas a ensaios funcionais e estruturais.
Title in English
Functional and structural characterization of lipolytic enzymes from a microbe consortium specialized for diesel oil degradation.
Keywords in English
Esterase
Lipase
Metagenome
Microbe consortium
Abstract in English
The global trade of industrial enzymes is estimated at 2.3 billion U.S. dollars, divided mainly between detergents (US$ 789 million), food applications (US$ 634 million), and agriculture (US$ 237 million). Within this trade, lipolytic enzymes have attracted enormous attention because of their biotechnological potential as catalysts of multiple reaction types (including hydrolysis, acidolysis, interesterification and glycerolysis). Lipolytic enzymes of microbial origin are economically attractive because they are easily biodegradable, usually act in mild conditions, and are chemo-selective, providing the pharmaceutical industry a method for obtaining drugs with reduced side effects. In this project, four individual genes encoding putative esterases/lipases identified in a metagenomic library obtained from a microbe consortium isolated from diesel oil-contaminated soil were cloned into expression vectors and expressed in Escherichia coli BL21 (DE3), and their corresponding recombinant proteins were used for functional and structural studies.
 
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Publishing Date
2016-01-04
 
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