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An acetyl esterase of Trichoderma reesei and its role in the hydrolysis of acetyl xylans

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Summary

An acetyl esterase was purified from Trichoderma reesei by cation and anion exchange chromatography. The enzyme had a molecular weight of 45 000 as determined by SDS-electrophoresis, or 67 000 as determined by gel filtration. In chromatofocusing the enzyme was shown to consist of two isoenzymes with isoelectric points of 6.8 and 6.0. The enzyme showed activity towards naphthyl acetate, triacetin and glucose-and xylose acetates. However, it liberated acetic acid from acetylated xylo-oligomers only to a small extent. The liberation of acetic acid from the oligomeric substrate was enhanced by addition of endoxylanase and β-xylosidase.

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Authors and Affiliations

  1. Biotechnical Laboratory, VTT, Tietotie 2, SF-02150, Espoo, Finland

    Kaisa Poutanen & Maija Sundberg

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  1. Kaisa Poutanen
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  2. Maija Sundberg
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Poutanen, K., Sundberg, M. An acetyl esterase of Trichoderma reesei and its role in the hydrolysis of acetyl xylans. Appl Microbiol Biotechnol 28, 419–424 (1988). https://doi.org/10.1007/BF00268207

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  • DOI: https://doi.org/10.1007/BF00268207

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