Comparison of catalytic properties of acetyl xylan esterases from three carbohydrate esterase families

Maija Tenkanen, Jaime Eyzaguirre, Riitta Isoniemi, Craig B. Faulds, Peter Biely

    Research output: Chapter in Book/Report/Conference proceedingChapter or book articleProfessional

    Abstract

    Most natural hemicelluloses are acetylated. Some xylans carryalso esterified phenolic acid side groups. Carbohydrate-actingesterases (CE) have been recently classified according tostructural similarities into several CE families. However, thisclassification does not necessarily predict the substrate specificity of these enzymes. In this work eight different hemicellulose-acting esterases from three different esterase families were studied. The substrate specificities and the modes of action of esterases from different families varied significantly. Some esterases acted on a wide range of substrates, i.e. on acetyl and on feruloyl groups in xylan and on acetyl groups in glucomannan, while others were strictly specific for one substrate. The CE family 1 and 5 esterases deacetylated first at the position 3 and 2, respectively, whereas the CE family 4 esterase performed a fast double deacetylation at both positions in methyl per-O-acetyl-β-D-xylopyranoside.
    Original languageEnglish
    Title of host publicationApplications of Enzymes to Lignocellulosics
    EditorsShawn D. Mansfield, John N. Saddler
    Place of PublicationWashington, DC
    PublisherAmerican Chemical Society ACS
    Chapter13
    Pages211-229
    ISBN (Electronic)9780841219601
    ISBN (Print)0-8412-3831-6
    DOIs
    Publication statusPublished - 2003
    MoE publication typeNot Eligible

    Publication series

    SeriesACS Symposium Series
    Volume855

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