A myxobacterial LPMO10 has oxidizing cellulose activity for promoting biomass enzymatic saccharification of agricultural crop straws.

Abstract:

:Myxobacteria are soil microorganisms with the ability to break down biological macromolecules due to the secretion of a large number of extracellular enzymes, but there has been no research report on myxobacterial lytic polysaccharide monooxygenases (LPMOs). In this study, two LPMO10s, ViLPMO10A and ViLPMO10B, from myxobacterium Vitiosangium sp. GDMCC 1.1324 were characterized. Of which, ViLPMO10B is a C1-oxidizing cellulose-active LPMO. Moreover, ViLPMO10B could decrease the degree of polymerization of crop straws cellulose and synergize with commercial cellulase to promote the saccharification. When the weight ratio of commercial cellulase to ViLPMO10B was 9:1, the conversion efficiency of corn stalk, sugarcane bagasse, and rice straw into reducing sugar was improved by 17%, 16%, and 22%, respectively, compared with commercial cellulase without ViLPMO10B. These results indicate that ViLPMO10B has the potential to be a component of a high-efficient cellulase cocktail and has application value in the saccharification of agricultural residual biomasses.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Zhou X,Xu Z,He J,Li Y,Pan C,Wang C,Deng MR,Zhu H

doi

10.1016/j.biortech.2020.124217

subject

Has Abstract

pub_date

2020-12-01 00:00:00

pages

124217

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(20)31491-7

journal_volume

318

pub_type

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