A
Anikó Várnai
Researcher at Norwegian University of Life Sciences
Publications - 56
Citations - 3418
Anikó Várnai is an academic researcher from Norwegian University of Life Sciences. The author has contributed to research in topics: Cellulose & Cellulase. The author has an hindex of 29, co-authored 47 publications receiving 2571 citations. Previous affiliations of Anikó Várnai include University of Helsinki & Budapest University of Technology and Economics.
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Journal ArticleDOI
Discovery of LPMO activity on hemicelluloses shows the importance of oxidative processes in plant cell wall degradation
Jane Wittrup Agger,Trine Isaksen,Anikó Várnai,Silvia Vidal-Melgosa,William G.T. Willats,Roland Ludwig,Svein Jarle Horn,Vincent G. H. Eijsink,Bjørge Westereng,Bjørge Westereng +9 more
TL;DR: It is demonstrated for the first time that an LPMO from Neurospora crassa, NcLPMO9C, indeed degrades various hemicelluloses, in particular xyloglucan, and this finding dramatically widens the scope of LPMOs and oxidative processes in plant cell wall degradation and biorefining.
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Restriction of the enzymatic hydrolysis of steam-pretreated spruce by lignin and hemicellulose
TL;DR: The results reveal that factors limiting the hydrolysability are mainly due to the lignin, and to a minor extent by the lack of accessory enzymes, making it questionable to use Avicel as a model cellulose substrate for hydrolysis experiments.
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Harnessing the potential of LPMO-containing cellulase cocktails poses new demands on processing conditions
Gerdt Müller,Anikó Várnai,Katja Salomon Johansen,Katja Salomon Johansen,Vincent G. H. Eijsink,Svein Jarle Horn +5 more
TL;DR: A direct correlation between saccharification yield and LPMO activity of commercial enzyme cocktails is demonstrated, which shows that the L PMO contribution to overall efficiency may be large if process conditions are adapted to the key determinants of LPMOs activity, namely the presence of electron donors and molecular oxygen.
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Oxidoreductases and Reactive Oxygen Species in Conversion of Lignocellulosic Biomass.
TL;DR: Different lignocellulolytic redox systems, enzymatic or not, that depend on fluxes of reactive oxygen species (ROS) are presented and it is suggested that fine-tuning of H2O2 levels and proximity between sites of H1O2 production and consumption are important for fungal biomass conversion.
Journal ArticleDOI
Structural and Functional Characterization of a Lytic Polysaccharide Monooxygenase with Broad Substrate Specificity
Anna S. Borisova,Trine Isaksen,Maria Dimarogona,Abhishek A. Kognole,Geir Mathiesen,Anikó Várnai,Åsmund K. Røhr,Christina M. Payne,Christina M. Payne,Morten Sørlie,Mats Sandgren,Vincent G. H. Eijsink +11 more
TL;DR: The novel structure of NcLPMO9C enabled a comparative study, revealing that the oxidative regioselectivity of L PMO9s (C1, C4, or both) correlates with distinct structural features of the copper coordination sphere.