TY - JOUR

T1 - BadGluc, a Β-glucosidase from Bjerkandera adusta with anthocyanase properties

AU - Behrens, Christoph J.

AU - Krahe, Nina K.

AU - Linke, Diana

AU - Berger, Ralf G.

N1 - Funding information: We want to thank Henkel KGaA for the financial support of this work.

PY - 2018/6/12

Y1 - 2018/6/12

N2 - A glycosidase of the basidiomycete Bjerkandera adusta (BadGluc) was found in screenings to possess a strong decolorizing ability towards malvidin-3-galactoside, an anthocyanin abundant in various berry fruits. The BadGluc was purified from the culture supernatant via FPLC, and the corresponding gene was identified which showed low similarity to other characterized glucosidases. Scanning the primary sequence with PROSITE no active site motif was detected. Eventually, a specific 18 aa consensus pattern was identified manually. The active site motif possessed an undescribed sequence which was only found in a few hypothetical proteins. The corresponding gene was cloned and expressed in Pichia pastoris GS115 yielding activities up to 100 U/L using 4-nitrophenyl-β-d-glucopyranoside (pNPG) as substrate. The enzyme possessed a good temperature (70% after 1 h at 50°C) and pH stability (70% between pH 2 and 7.5), and preferably catalysed the hydrolysis of delphinidin-3-glucoside and cyanidin-3-glucoside, regardless of the position of the terminal Hexa-His tag. This novel glucosidase worked in aqueous solution as well as on pre-stained fabrics making it the first known candidate anthocyanase for applications in the detergent and food industries.

AB - A glycosidase of the basidiomycete Bjerkandera adusta (BadGluc) was found in screenings to possess a strong decolorizing ability towards malvidin-3-galactoside, an anthocyanin abundant in various berry fruits. The BadGluc was purified from the culture supernatant via FPLC, and the corresponding gene was identified which showed low similarity to other characterized glucosidases. Scanning the primary sequence with PROSITE no active site motif was detected. Eventually, a specific 18 aa consensus pattern was identified manually. The active site motif possessed an undescribed sequence which was only found in a few hypothetical proteins. The corresponding gene was cloned and expressed in Pichia pastoris GS115 yielding activities up to 100 U/L using 4-nitrophenyl-β-d-glucopyranoside (pNPG) as substrate. The enzyme possessed a good temperature (70% after 1 h at 50°C) and pH stability (70% between pH 2 and 7.5), and preferably catalysed the hydrolysis of delphinidin-3-glucoside and cyanidin-3-glucoside, regardless of the position of the terminal Hexa-His tag. This novel glucosidase worked in aqueous solution as well as on pre-stained fabrics making it the first known candidate anthocyanase for applications in the detergent and food industries.

KW - Anthocyanases

KW - Bleaching

KW - Glucosidases

KW - Heterologous expression

KW - Industrial enzymes

UR - http://www.scopus.com/inward/record.url?scp=85048375235&partnerID=8YFLogxK

U2 - 10.1007/s00449-018-1966-4

DO - 10.1007/s00449-018-1966-4

M3 - Article

C2 - 29948211

AN - SCOPUS:85048375235

VL - 41

SP - 1391

EP - 1401

JO - Bioprocess and Biosystems Engineering

JF - Bioprocess and Biosystems Engineering

SN - 1615-7591

IS - 9

ER -