Download MendeleyStructural and Functional Characterization of a Small Chitin-Active Lytic Polysaccharide Monooxygenase Domain of a Multi-Modular Chitinase from Jonesia Denitrificans.
Mekasha, S., Forsberg, Z., Dalhus, B., Bacik, J., Choudhary, S., Schmidt-Dannert, C., Vaaje-Kolstad, G., Eijsink, V.G.H.(2016) FEBS Lett 590: 34
- PubMed: 26763108
- DOI: https://doi.org/10.1002/1873-3468.12025
- Primary Citation of Related Structures:
5AA7 - PubMed Abstract:
Lytic polysaccharide monooxygenases (LPMOs) boost enzymatic depolymerization of recalcitrant polysaccharides, such as chitin and cellulose. We have studied a chitin-active LPMO domain (JdLPMO10A) that is considerably smaller (15.5 kDa) than all structurally characterized LPMOs so far and that is part of a modular protein containing a GH18 chitinase. The 1.55 Å resolution structure revealed deletions of interacting loops that protrude from the core β-sandwich scaffold in larger LPMO10s. Despite these deletions, the enzyme is active on alpha- and beta-chitin, and the chitin-binding surface previously described for larger LPMOs is fully conserved. JdLPMO10A may represent a minimal scaffold needed to catalyse the powerful LPMO reaction.
Organizational Affiliation:
Department of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, Ås, Norway.
