Loading
PDBj
MenuPDBj@FacebookPDBj@X(formerly Twitter)PDBj@BlueSkyPDBj@YouTubewwPDB FoundationwwPDB
RCSB PDBPDBeBMRBAdv. SearchSearch help

4OY7

Structure of cellulose active LPMO CelS2 (ScLPMO10C) in complex with Copper.

Summary for 4OY7
Entry DOI10.2210/pdb4oy7/pdb
Related4OY6 4OY8
DescriptorPutative secreted cellulose binding protein, COPPER (II) ION, CALCIUM ION, ... (4 entities in total)
Functional Keywordslpmo, aa10, cbm33, pmo, gh61, cellulose degradation, copper monooxygenase, oxidoreductase
Biological sourceStreptomyces coelicolor
Total number of polymer chains8
Total formula weight168643.54
Authors
Forsberg, Z.,Mackenzie, A.K.,Sorlie, M.,Rohr, A.K.,Helland, R.,Arvai, A.S.,Vaaje-Kolstad, G.,Eijsink, V.G.H. (deposition date: 2014-02-11, release date: 2014-05-28, Last modification date: 2024-10-16)
Primary citationForsberg, Z.,Mackenzie, A.K.,Srlie, M.,Rhr, A.K.,Helland, R.,Arvai, A.S.,Vaaje-Kolstad, G.,Eijsink, V.G.
Structural and functional characterization of a conserved pair of bacterial cellulose-oxidizing lytic polysaccharide monooxygenases.
Proc.Natl.Acad.Sci.USA, 111:8446-8451, 2014
Cited by
PubMed Abstract: For decades, the enzymatic conversion of cellulose was thought to rely on the synergistic action of hydrolytic enzymes, but recent work has shown that lytic polysaccharide monooxygenases (LPMOs) are important contributors to this process. We describe the structural and functional characterization of two functionally coupled cellulose-active LPMOs belonging to auxiliary activity family 10 (AA10) that commonly occur in cellulolytic bacteria. One of these LPMOs cleaves glycosidic bonds by oxidation of the C1 carbon, whereas the other can oxidize both C1 and C4. We thus demonstrate that C4 oxidation is not confined to fungal AA9-type LPMOs. X-ray crystallographic structures were obtained for the enzyme pair from Streptomyces coelicolor, solved at 1.3 Å (ScLPMO10B) and 1.5 Å (CelS2 or ScLPMO10C) resolution. Structural comparisons revealed differences in active site architecture that could relate to the ability to oxidize C4 (and that also seem to apply to AA9-type LPMOs). Despite variation in active site architecture, the two enzymes exhibited similar affinities for Cu(2+) (12-31 nM), redox potentials (242 and 251 mV), and electron paramagnetic resonance spectra, with only the latter clearly different from those of chitin-active AA10-type LPMOs. We conclude that substrate specificity depends not on copper site architecture, but rather on variation in substrate binding and orientation. During cellulose degradation, the members of this LPMO pair act in synergy, indicating different functional roles and providing a rationale for the abundance of these enzymes in biomass-degrading organisms.
PubMed: 24912171
DOI: 10.1073/pnas.1402771111
PDB entries with the same primary citation
Experimental method
X-RAY DIFFRACTION (1.5 Å)
Structure validation

227561

PDB entries from 2024-11-20

PDB statisticsPDBj update infoContact PDBjnumon