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  • Title: A glucuronoyl esterase from Acremonium alcalophilum cleaves native lignin-carbohydrate ester bonds.
    Author: Arnling Bååth J, Giummarella N, Klaubauf S, Lawoko M, Olsson L.
    Journal: FEBS Lett; 2016 Aug; 590(16):2611-8. PubMed ID: 27397104.
    Abstract:
    The Glucuronoyl esterases (GE) have been proposed to target lignin-carbohydrate (LC) ester bonds between lignin moieties and glucuronic acid side groups of xylan, but to date, no direct observations of enzymatic cleavage on native LC ester bonds have been demonstrated. In the present investigation, LCC fractions from spruce and birch were treated with a recombinantly produced GE originating from Acremonium alcalophilum (AaGE1). A combination of size exclusion chromatography and (31) P NMR analyses of phosphitylated LCC samples, before and after AaGE1 treatment provided the first evidence for cleavage of the LC ester linkages existing in wood.
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