Abstract
The aim of this research was the partial characterization of polygalacturonase (PG) extracts produced by a newly isolated Penicillium brasilianum and Aspergillus niger in submerged fermentation. The partial characterization of the crude enzymatic extracts showed optimum activity at pH 5.5 and 37 °C for both extracts. The results of temperature stability showed that PG from both microorganisms were more stable at 55 °C. However, the enzyme obtained by P. brasilianum presents a half-life time (t 1/2 = 693.10 h), about one order of magnitude higher than those observed in for A. niger at 55 °C. In terms of pH stability, the PG produced by P. brasilianum presented higher stability at pH 4.0 and 5.0, while the PG from A. niger showed higher stability at pH 5.0.
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The authors acknowledge the financial support of CNPQ, FAPERGS and CAPES.
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Zeni, J., Pili, J., Cence, K. et al. Characterization of novel thermostable polygalacturonases from Penicillium brasilianum and Aspergillus niger . Bioprocess Biosyst Eng 38, 2497–2502 (2015). https://doi.org/10.1007/s00449-015-1468-6
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DOI: https://doi.org/10.1007/s00449-015-1468-6