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Title: Antioxidant activity of xylooligosaccharides produced from glucuronoxylan by Xyn10A and Xyn30D and eucalyptus autohydrolysates
Author: Valls Vidal, Cristina
Pastor Blasco, Francisco I. Javier
Vidal, Teresa
Roncero, M. Blanca
Díaz Lucea, Pilar
Martínez Martínez, Josefina
Valenzuela Mayorga, Susana Valeria
Keywords: Antioxidants
Issue Date: 7-Apr-2018
Publisher: Elsevier B.V.
Abstract: Antioxidant activity of xylooligosaccharides (XOS) released from beechwood and birchwood glucuronoxylans by two different xylanases, one from family GH10 (Xyn10A) and another from family GH30 (Xyn30D) was ex-amined. The ABTS (2, 2′-Azino-bis(3-ethylbenzothiazoline-6-sulfonic acid)) method was used, since it resulted more accurate for the antioxidant activity determination of XOS. Thin layer chromatography and MALDI-TOF MS analysis showed that Xyn10A produced a mixture of neutral and acidic XOS whereas the XOS produced by Xyn30D were all acidic, containing a methylglucuronic acid (MeGlcA) ramification. These acidic XOS, MeGlcA substituted, showed a strongly higher antioxidant activity than the XOS produced by Xyn10A (80% vs. 10%respectively, at 200 μgmL−1). Moreover, the antioxidant activity increased with the degree of polymerization of XOS, and depended on the xylan substrate used. The antioxidant capacity of eucalyptus autohydrolysates after xylanase treatment was also analysed, showing a decrease of their antioxidant activity simultaneous with the decrease in XOS length.
Note: Versió postprint del document publicat a:
It is part of: Carbohydrate Polymers, 2018, vol. 194, p. 43-50
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ISSN: 0144-8617
Appears in Collections:Articles publicats en revistes (Genètica, Microbiologia i Estadística)

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