A β-mannan utilisation locus in Bacteroides ovatus involves a GH36 α-galactosidase active on galactomannans
Författare
Summary, in English
The Bacova_02091 gene in the β-mannan utilisation locus of Bacteroides ovatus encodes a family GH36 α-galactosidase (BoGal36A), transcriptionally upregulated during growth on galactomannan. Characterisation of recombinant BoGal36A reveals unique properties compared to other GH36 α-galactosidases, which preferentially hydrolyse terminal α-galactose in raffinose family oligosaccharides. BoGal36A prefers hydrolysing internal galactose substitutions from intact and depolymerized galactomannan. BoGal36A efficiently releases (>90%) galactose from guar and locust bean galactomannans, resulting in precipitation of the polysaccharides. As compared to other GH36 structures, the BoGal36A 3D model displays a loop deletion, resulting in a wider active site cleft which likely can accommodate a galactose-substituted polymannose backbone. This article is protected by copyright. All rights reserved.
Avdelning/ar
Publiceringsår
2016-06-11
Språk
Engelska
Sidor
2106-2118
Publikation/Tidskrift/Serie
FEBS Letters
Volym
590
Issue
14
Dokumenttyp
Artikel i tidskrift
Förlag
Wiley-Blackwell
Ämne
- Structural Biology
- Biochemistry and Molecular Biology
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 1873-3468