Amino Acid Supplementation Improves the Production of Extracellular Peptidases by Aspergillus Section Flavi and their Ionic Immobilization

Autor(es)

Nathalia Gonsales da Rosa-Garzon ^[1] ; Ana Claudia Rodrigues de Siqueira ^[2] ; Viviane Naomi Hirano ^[3] ; André Rodrigues ^[4] ; Benevides Costa Pessela ^[5] ; Hamilton Cabral ^[6]

Afiliação do(s) autor(es)

^[1] University of São Paulo. School of Pharmaceutical Sciences of Ribeirão Preto - Brasil

^[2] University of São Paulo. School of Pharmaceutical Sciences of Ribeirão Preto - Brasil

^[3] University of São Paulo. School of Pharmaceutical Sciences of Ribeirão Preto - Brasil

^[4] São Paulo State University. Department of Biochemistry and Microbiology - Brasil

^[5] Universidad Autónoma de Madrid. Instituto de investigación en Ciencias de la Alimentación. Consejo Superior de Investigaciones Científicas - Espanha

^[6] University of São Paulo. School of Pharmaceutical Sciences of Ribeirão Preto - Brasil

• Tipo de documento: Artigo Científico
• Fonte: Brazilian Archives of Biology and Technology; v. 63, 2020-05-08.

Resumo

Abstract Bioprocess studies have been highlighted due to the importance of physiological processes and industrial applications of enzymes. The potential of peptidase production from Aspergillus section Flavi using different amino acids as a supplemental nitrogen source was investigated. A production profile revealed that amino acids had positive effects on peptidase production when compared to the control without amino acids. Optimal production (100 U/mL) was obtained with Arginine amino acid in 96 h of fermentation. Extracellular peptidase from Aspergillus section Flavi was identified in submerged bioprocesses by in situ activity. Biochemical studies revealed that the maximum activities of the enzyme extract were obtained at pH 6.5 and a temperature of 55°C. The inhibition by EDTA and PMSF suggests the presence of more than one peptidase while the Ni2+ and Cu2+ had a negative influence on the enzyme activity. When the crude extract was reversibly immobilized on ionic supports, DEAE-Agarose and MANAE-Agarose the derivative showed different profiles of thermal and pH stabilities. Hence, this study revealed the basic properties and biochemical characteristics that allowed the production improvement of this class of enzyme. Moreover, with known properties stabilization and immobilization process is required to further explore its biotechnological capacities. (AU)

• Processo FAPESP: 11/06986-0 - Determinação da especificidade de peptidases isoladas de fungos usando peptídeos FRET como substratos
• Beneficiário: Hamilton Cabral
• Modalidade de apoio: Auxílio à Pesquisa - Regular