Characterization of a β-1,4-mannanase from a newly isolated strain of Pholiota adiposa and its application for biomass pretreatment.

Abstract:

:A highly efficient β-1,4-mannanase-secreting strain, Pholiota adiposa SKU0714, was isolated and identified on the basis of its morphological features and sequence analysis of internal transcribed spacer rDNA. P. adiposa β-1,4-mannanase was purified to homogeneity from P. adiposa culture supernatants by one-step chromatography on a Sephacryl gel filtration column. P. adiposa β-1,4-mannanase showed the highest activity toward locust bean gum (V max = 1,990 U/mg protein, K m = 0.12 mg/mL) ever reported. Its internal amino acid sequence showed homology with hydrolases from the glycoside hydrolase family 5 (GH5), indicating that the enzyme is a member of the GH5 family. The saccharification of commercial mannanase and P. adiposa β-1,4-mannanase-pretreated rice straw by Celluclast 1.5L (Novozymes) was compared. In comparison with the commercial Novo Mannaway(®) (113 mg/g-substrate), P. adiposa β-1,4-mannanase-pretreated rice straw released more reducing sugars (141 mg/g-substrate). These properties make P. adiposa β-1,4-mannanase a good candidate as a new commercial β-1,4-mannanase to improve biomass pretreatment.

journal_name

Bioprocess Biosyst Eng

authors

Ramachandran P,Zhao Z,Singh R,Dhiman SS,Choi JH,Kim D,Haw JR,Lee JK

doi

10.1007/s00449-014-1156-y

subject

Has Abstract

pub_date

2014-09-01 00:00:00

pages

1817-24

issue

9

eissn

1615-7591

issn

1615-7605

journal_volume

37

pub_type

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