Single-molecule study of oxidative enzymatic deconstruction of cellulose.
Single-molecule study of oxidative enzymatic deconstruction of cellulose.
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DOI:
10.1038/s41467-017-01028-y
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发表时间:
2017-10-12
影响因子:
16.6
通讯作者:
Nidetzky B
中科院分区:
文献类型:
--
作者:
Eibinger M;Sattelkow J;Ganner T;Plank H;Nidetzky B
LPMO (lytic polysaccharide monooxygenase) represents a unique paradigm of cellulosic biomass degradation by an oxidative mechanism. Understanding the role of LPMO in deconstructing crystalline cellulose is fundamental to the enzyme’s biological function and will help to specify the use of LPMO in biorefinery applications. Here we show with real-time atomic force microscopy that C1 and C4 oxidizing types of LPMO from Neurospora crassa (NcLPMO9F, NcLPMO9C) bind to nanocrystalline cellulose with high preference for the very same substrate surfaces that are also used by a processive cellulase (Trichoderma reesei CBH I) to move along during hydrolytic cellulose degradation. The bound LPMOs, however, are immobile during their adsorbed residence time ( ~ 1.0 min for NcLPMO9F) on cellulose. Treatment with LPMO resulted in fibrillation of crystalline cellulose and strongly ( ≥ 2-fold) enhanced the cellulase adsorption. It also increased enzyme turnover on the cellulose surface, thus boosting the hydrolytic conversion. Understanding the role of enzymes in biomass depolymerization is essential for the development of more efficient biorefineries. Here, the authors show by atomic force microscopy the real-time mechanism of cellulose deconstruction by lytic polysaccharide monooxygenases.
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影响因子:
6.3
作者:
Horn SJ;Vaaje-Kolstad G;Westereng B;Eijsink VG
通讯作者:
Eijsink VG
影响因子:
11.2
作者:
Lu, Ping;Hsieh, You-Lo
通讯作者:
Hsieh, You-Lo
影响因子:
9.5
作者:
Ganner, Thomas;Rosker, Stephanie;Plank, Harald
通讯作者:
Plank, Harald
影响因子:
56.9
作者:
Igarashi, Kiyohiko;Uchihashi, Takayuki;Samejima, Masahiro
通讯作者:
Samejima, Masahiro
影响因子:
6.3
作者:
Müller G;Várnai A;Johansen KS;Eijsink VG;Horn SJ
通讯作者:
Horn SJ