Reaction: [(1→4)-β-D-glucosyl]n+m + reduced acceptor + O2 = [(1→4)-β-D-glucosyl]m-1-(1→4)-D-glucono-1,5-lactone + [(1→4)-β-D-glucosyl]n + acceptor + H2O
Other name(s): lytic polysaccharide monooxygenase (ambiguous); LPMO (ambiguous); LPMO9A
Systematic name: cellulose, hydrogen-donor:oxygen oxidoreductase (D-glucosyl C1-hydroxylating)
Comments: This copper-containing enzyme, found in fungi and bacteria, cleaves cellulose in an oxidative manner. The cellulose fragments that are formed contain a D-glucono-1,5-lactone residue at the reducing end, which hydrolyses quickly and spontaneously to the aldonic acid. The electrons are provided in vivo by the cytochrome b domain of EC 1.1.99.18, cellobiose dehydrogenase (acceptor) [1]. Ascorbate can serve as the electron donor in vitro.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, CAS registry number:
References:
1. Phillips, C.M., Beeson, W.T., Cate, J.H. and Marletta, M.A. Cellobiose dehydrogenase and a copper-dependent polysaccharide monooxygenase potentiate cellulose degradation by Neurospora crassa. ACS Chem. Biol. 6 (2011) 1399-1406. [PMID: 22004347]
2. Beeson, W.T., Phillips, C.M., Cate, J.H. and Marletta, M.A. Oxidative cleavage of cellulose by fungal copper-dependent polysaccharide monooxygenases. J. Am. Chem. Soc. 134 (2012) 890-892. [PMID: 22188218]
3. Li, X., Beeson, W.T., 4th, Phillips, C.M., Marletta, M.A. and Cate, J.H. Structural basis for substrate targeting and catalysis by fungal polysaccharide monooxygenases. Structure 20 (2012) 1051-1061. [PMID: 22578542]
4. Bey, M., Zhou, S., Poidevin, L., Henrissat, B., Coutinho, P.M., Berrin, J.G. and Sigoillot, J.C. Cello-oligosaccharide oxidation reveals differences between two lytic polysaccharide monooxygenases (family GH61) from Podospora anserina. Appl. Environ. Microbiol. 79 (2013) 488-496. [PMID: 23124232]
5. Frommhagen, M., Sforza, S., Westphal, A.H., Visser, J., Hinz, S.W., Koetsier, M.J., van Berkel, W.J., Gruppen, H. and Kabel, M.A. Discovery of the combined oxidative cleavage of plant xylan and cellulose by a new fungal polysaccharide monooxygenase. Biotechnol. Biofuels 8 (2015) 101. [PMID: 26185526]
6. Patel, I., Kracher, D., Ma, S., Garajova, S., Haon, M., Faulds, C.B., Berrin, J.G., Ludwig, R. and Record, E. Salt-responsive lytic polysaccharide monooxygenases from the mangrove fungus Pestalotiopsis sp. NCi6. Biotechnol Biofuels 9 (2016) 108. [PMID: 27213015]
7. Courtade, G., Wimmer, R., Rohr, A.K., Preims, M., Felice, A.K., Dimarogona, M., Vaaje-Kolstad, G., Sorlie, M., Sandgren, M., Ludwig, R., Eijsink, V.G. and Aachmann, F.L. Interactions of a fungal lytic polysaccharide monooxygenase with β-glucan substrates and cellobiose dehydrogenase. Proc. Natl. Acad. Sci. USA 113 (2016) 5922-5927. [PMID: 27152023]