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Mutagenesis of Aspergillus oryzae IPT-301 to improve the production of β-fructofuranosidase BJM
Maresma,Beatriz Guilarte; Castillo,Boris Gutarra; Fernández,Rubén Cuervo; Silva,Elda Sabino da; Maiorano,Alfredo Eduardo; Rodrigues,Maria Filomena de Andrade.
Aspergillus oryzae IPT-301, previously reported as a β-fructofuranosidase producing microorganism, was successfully mutated using UV irradiation at 253.7 nm followed by the screening of survivors resistant to certain stress conditions. Strains were first subjected to the β-fructofuranosidase activity assay using a portion from the colony grown in Petri dish as the enzyme source. Seven mutants with fructofuranosidase activity values relative to the parent culture between 140 -190% were selected from survivors grown at temperature of 40ºC or 0.018% (w/v) sodium dodecyl sulfate concentration. They were cultivated on a rotary shaker to characterize mycelium and extracellular fructosyltransferase activities. Three mutants named IPT-745, IPT-746 and IPT-748...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aspergillus oryzae; Mutagenesis; Β-fructofuranosidase; Fructosyltransferase; Fructooligosaccharides; UV irradiation.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000100027
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