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- W3204376229 abstract "PcAxy43B is a modular protein comprising a catalytic domain of glycoside hydrolase family 43 (GH43), a family 6 carbohydrate-binding module (CBM6), and a family 36 carbohydrate-binding module (CBM36) and found to be a novel multifunctional xylanolytic enzyme from Paenibacillus curdlanolyticus B-6. This enzyme exhibited α-l-arabinofuranosidase, endoxylanase, and β-d-xylosidase activities. The α-l-arabinofuranosidase activity of PcAxy43B revealed a new property of GH43, via the release of both long-chain cereal arabinoxylan and short-chain arabinoxylooligosaccharide (AXOS), as well as release from both the C(O)2 and C(O)3 positions of AXOS, which is different from what has been seen for other arabinofuranosidases. PcAxy43B liberated a series of xylooligosaccharides (XOSs) from birchwood xylan and xylohexaose, indicating that PcAxy43B exhibited endoxylanase activity. PcAxy43B produced xylose from xylobiose and reacted with p-nitrophenyl-β-d-xylopyranoside as a result of β-xylosidase activity. PcAxy43B effectively released arabinose together with XOSs and xylose from the highly arabinosyl-substituted rye arabinoxylan. Moreover, PcAxy43B showed significant synergistic action with the trifunctional endoxylanase/β-xylosidase/α-l-arabinofuranosidase PcAxy43A and the endoxylanase Xyn10C from strain B-6, in which almost all products produced from rye arabinoxylan by these combined enzymes were arabinose and xylose. In addition, the presence of CBM36 was found to be necessary for the endoxylanase property of PcAxy43B. PcAxy43B is capable of hydrolyzing untreated cereal biomass, corn hull, and rice straw into XOSs and xylose. Hence, PcAxy43B, a significant accessory multifunctional xylanolytic enzyme, is a potential candidate for application in the saccharification of cereal biomass. IMPORTANCE Enzymatic saccharification of cereal biomass is a strategy for the production of fermented sugars from low-price raw materials. In the present study, PcAxy43B from P. curdlanolyticus B-6 was found to be a novel multifunctional α-l-arabinofuranosidase/endoxylanase/β-d-xylosidase enzyme of glycoside hydrolase family 43. It is effective in releasing arabinose, xylose, and XOSs from the highly arabinosyl-substituted rye arabinoxylan, which is usually resistant to hydrolysis by xylanolytic enzymes. Moreover, almost all products produced from rye arabinoxylan by the combination of PcAxy43B with the trifunctional xylanolytic enzyme PcAxy43A and the endoxylanase Xyn10C from strain B-6 were arabinose and xylose, which can be used to produce several value-added products. In addition, PcAxy43B is capable of hydrolyzing untreated cereal biomass into XOSs and xylose. Thus, PcAxy43B is an important multifunctional xylanolytic enzyme with high potential in biotechnology." @default.
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- W3204376229 date "2021-11-24" @default.
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- W3204376229 title "A Novel Multifunctional Arabinofuranosidase/Endoxylanase/β-Xylosidase GH43 Enzyme from Paenibacillus curdlanolyticus B-6 and Its Synergistic Action To Produce Arabinose and Xylose from Cereal Arabinoxylan" @default.
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- W3204376229 doi "https://doi.org/10.1128/aem.01730-21" @default.
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