Two Novel α-l-Arabinofuranosidases from Bifidobacterium longum subsp. longum Belonging to Glycoside Hydrolase Family 43 Cooperatively Degrade Arabinan.

ABSTRACT: Arabinose-containing poly- or oligosaccharides are suitable carbohydrate sources for Bifidobacterium longum subsp. longum However, their degradation pathways are poorly understood. In this study, we cloned and characterized the previously uncharacterized glycoside hydrolase family 43 (GH43) enzymes B. longum subsp. longum ArafC (BlArafC; encoded by BLLJ_1852) and B. longum subsp. longum ArafB (BlArafB; encoded by BLLJ_1853) from B. longum subsp. longum JCM 1217. Both enzymes exhibited α-l-arabinofuranosidase activity toward p-nitrophenyl-α-l-arabinofuranoside but no activity toward p-nitrophenyl-β-d-xylopyranoside. The specificities of the two enzymes for l-arabinofuranosyl linkages were different. BlArafC catalyzed the

SUBMITTER: Komeno M 

PROVIDER: S-EPMC6414367 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature