Recombinant xylanase production by Escherichia coli using a non-induced expression system with different nutrient sources

Autor(es)

Mendonca, Elenira H. M. ^[1] ; Avanci, Nilton Cesar ^[1] ; Romano, Luis Henrique ^[1] ; Branco, Daniel Lopes ^[1] ; de Padua, Alessandra Xavier ^[1] ; Ward, Richard John ^[2] ; Neto, Alvaro de Baptista ^[3] ; Lourenzoni, Marcos Roberto ^{[1, 4]}

Afiliação do(s) autor(es)

^[1] Verdartis Desenvolvimento Biotecnol Ltda, Av Dra Naldir Ribeirao Preto, 1805, Jardim Dr Paulo, BR-14056680 Ribeirao Preto, SP - Brazil

^[2] Univ Sao Paulo, Fac Filosofia Ciencias & Letras Ribeirao Preto, Dept Quim, Ave Bandeirantes 3-900, BR-14040900 Ribeirao Preto, SP - Brazil

^[3] Univ Estadual Paulista, Fac Ciencias Farmaceut, Dept Bioprocessos & Biotecnol, Rodovia Araraquara Jau, Km 01, Campos Ville, BR-14800903 Araraquara, SP - Brazil

^[4] Fundacao Oswaldo Cruz, FIOCRUZ, Rua Sao Jose S-N, BR-61760000 Eusebio, CE - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Brazilian Journal of Chemical Engineering; v. 37, n. 1, p. 29-39, MAR 2020.
• Citações Web of Science: 0

Resumo

The application of enzymes for sustainable and low-environmental impact industrial processes requires high-level enzyme production at low-cost. A promising strategy is the use of a high efficiency heterologous protein expression system using E. coli and the pT7BsXA vector encoding the GH11 xylanase from Bacillus subtilis with promoter, replication origin and signal peptide sequences from B. subtilis (Ruller et al. 2006). This expression system produces high amounts of enzyme that are secreted to the culture broth. The present study aimed to maximize the xylanase production by this system through evaluation of culture medium composition. Different culture media previously described in the literature together with compositions derived from agro-industrial residues were evaluated. A culture medium derived from agro-industrial residues using sugarcane molasses as carbon source showed a 9-fold increase in enzyme production (195,000 U/L) in relation to LB medium and the lowest production cost, which was 8.5-fold lower than LB medium using sugarcane molasses as carbon source and brewer's yeast as vitamin source in shaker experiments. In a bioreactor experiment the best production medium promoted an 8.5-fold higher production at a 10.8-fold lower cost as compared to shaker LB cultivation. (AU)

• Processo FAPESP: 08/53426-7 - Bioprocesso de produção de enzimas para biorrefinaria de biomassa: branqueamento de celulose
• Beneficiário: Álvaro de Baptista Neto
• Linha de fomento: Auxílio à Pesquisa - Pesquisa Inovativa em Pequenas Empresas - PIPE
• Processo FAPESP: 10/50328-4 - Desenvolvimento de enzimas para biobranqueamento de celulose: serviço de personalização de enzimas através de um processo robusto e inovador de engenharia molecular
• Beneficiário: Nínive Aguiar Colonello Frattini
• Linha de fomento: Auxílio à Pesquisa - Pesquisa Inovativa em Pequenas Empresas - PIPE