Production and purification of a fungal chitosanase and chitooligomers from Penicillium janthinellum D4 and discovery of the enzyme activators

Anh Dzung Nguyen, Chun Ching Huang, Tzu Wen Liang, Van Bon Nguyen, Po Shen Pan, San Lang Wang

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)

Abstract

Chitosanases have received much attention because of their wide range of applications. Although most fungal chitosanases use sugar as their major carbon source, in the present work, a chitosanase was induced from a squid pen powder (SPP)-containing Penicillium janthinellum D4 medium and purified by ammonium sulphate precipitation and combined column chromatography. The purified D4 chitosanase exhibited optimum activity at pH 7-9, 60 °C and was stable at pH 7-11, 25-50°C. The D4 chitosanase that was used for chitooligomers preparation was studied. The enzyme products revealed various chitooligomers with different degrees of polymerisation (DP) from 3 to 9, as determined by a MALDI-TOF mass spectrometer, confirming the endo-type nature of the D4 chitosanase. D4 chitosanase activity was significantly inhibited by Cu2+, Mn2+, and EDTA. However, Fe2+ activated or inhibited D4 chitosanases at different concentrations. The D4 chitosanase was also activated by some small synthetic boron-containing molecules with boronate ester side chains.

Original languageEnglish
Pages (from-to)331-337
Number of pages7
JournalCarbohydrate Polymers
Volume108
Issue number1
DOIs
Publication statusPublished - 2014 Aug 8

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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