Carbon sources effect on pectinase production from Aspergillus japonicus 586

The effect of different carbon sources on the pectinesterases, endo- and exo-polygalacturonase activities from Aspergillus japonicus 586 was evaluated in liquid media (Manachini solutions) supplemented with different substrate concentrations. The culture medium was inoculated with 5.10(6) spores/ml...

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Published inBrazilian journal of microbiology Vol. 31; no. 4; pp. 286 - 290
Main Authors Teixeira, Maria F. S.(Universidade de Amazonas Laboratório de Microbiologia), Lima Filho, José L.(Universidade Federal de Pernambuco Laboratório de Bioquímica), Durán, Nelson(Universidade Estadual de Campinas Instituto de Química Laboratório de Química Biológica)
Format Journal Article
LanguageEnglish
Published São Paulo Sociedade Brasileira de Microbiologia 01.10.2000
Springer Nature B.V
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Summary:The effect of different carbon sources on the pectinesterases, endo- and exo-polygalacturonase activities from Aspergillus japonicus 586 was evaluated in liquid media (Manachini solutions) supplemented with different substrate concentrations. The culture medium was inoculated with 5.10(6) spores/ml and mantained under agitation (140 rpm), at 30°C, during 122 h. The enzyme evaluation was carried out 24 h after filtration. The crude extract from A. japonicus 586 indicated that the best enzymatic activities were afforded in the presence of 0.5% pectin (pectinesterease), 0.2% pectin and 0.2% glycerol (endopolygalacturonase), and 0.5% pectin associated to 0.5% glucose (exopolygalacturonase). Carbon sources concentration, isolated or associated, significantly affects the pectinesterase, and endo- and exopolygalacturonase activities. Pectin, glucose and saccharose, when added to the culture medium in high concentrations, exhibited a repression effect on all the analyzed enzymes. Foi avaliado o efeito de diferentes fontes de carbono na atividade de pectinesterease, endo - e exo-polygalacturonase de Aspergillus japonicus 586, em meio líquido (soluções de Manachini) suplementado com diferentes concentrações de substratos. O meio de cultura foi inoculado com 5 x 10(6) esporos/ml e mantido sob agitação (140 rpm), a 30°C, durante 120 h. A avaliação das enzimas foi realizada a cada 24 h após filtração. O extrato cru de A. japonicus 586 mostrou que as melhores atividades enzimáticas foram obtidas na presença de 0,5% pectina (pectinestarease), 0,2% pectina e 0,2% glicerol (endopoligalacturonase) e 0,5% pectina associada a 0,5% glicose (exopoligalacturonase). Diferentes concentrações de fontes de carbono, isoladas ou associadas afetaram significativamente as atividades de polinesterase, endo- e exopoligalacturonase. Quando adicionado pectina, glicose e sacarose em altas concentrações, ao meio de cultura, observou-se um efeito de repressão de todas as enzimas analisadas.
Bibliography:10.1590/S1517-83822000000400009
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822000000400009
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ISSN:1517-8382
1678-4405
1678-4405
1517-8382
DOI:10.1590/S1517-83822000000400009