skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Oxygen Activation at the Active Site of a Fungal Lytic Polysaccharide Monooxygenase

Abstract

Lytic polysaccharide monooxygenases have attracted vast attention owing to their abilities to disrupt glycosidic bonds via oxidation instead of hydrolysis and to enhance enzymatic digestion of recalcitrant substrates including chitin and cellulose. Here, we determined the high-resolution X-ray crystal structures of an enzyme from Neurospora crassa in the resting state and of a copper(II) dioxo intermediate complex formed in the absence of substrate. X-ray crystal structures also revealed “pre-bound” molecular oxygen adjacent to the active site. An examination of protonation states enabled by neutron crystallography and density functional theory calculations identified a role for a conserved histidine in promoting oxygen activation. Our results provide a new structural description of oxygen activation by substrate free lytic polysaccharide monooxygenases and provide insights that can be extended to reactivity in the enzyme–substrate complex.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Dept. of Molecular and Structural Biochemistry
  2. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Biochemisty, Cellular and Molecular Biology; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Knoxville and Computatinal Biology Inst., Computer Science, Mathematics Division
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER); National Science Foundation (NSF); National Institutes of Health (NIH)
OSTI Identifier:
1407721
Grant/Contract Number:  
AC05-00OR22725; MRI 09229719; IGERT 1069091; GM105978
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Angewandte Chemie
Additional Journal Information:
Journal Volume: 129; Journal Issue: 3; Journal ID: ISSN 0044-8249
Publisher:
German Chemical Society
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; copper; oxidoreductases; oxygen activation; polysaccharide monooxygenases; protein structures

Citation Formats

O'Dell, William B., Agarwal, Pratul K., and Meilleur, Flora. Oxygen Activation at the Active Site of a Fungal Lytic Polysaccharide Monooxygenase. United States: N. p., 2016. Web. doi:10.1002/ange.201610502.
O'Dell, William B., Agarwal, Pratul K., & Meilleur, Flora. Oxygen Activation at the Active Site of a Fungal Lytic Polysaccharide Monooxygenase. United States. https://doi.org/10.1002/ange.201610502
O'Dell, William B., Agarwal, Pratul K., and Meilleur, Flora. 2016. "Oxygen Activation at the Active Site of a Fungal Lytic Polysaccharide Monooxygenase". United States. https://doi.org/10.1002/ange.201610502. https://www.osti.gov/servlets/purl/1407721.
@article{osti_1407721,
title = {Oxygen Activation at the Active Site of a Fungal Lytic Polysaccharide Monooxygenase},
author = {O'Dell, William B. and Agarwal, Pratul K. and Meilleur, Flora},
abstractNote = {Lytic polysaccharide monooxygenases have attracted vast attention owing to their abilities to disrupt glycosidic bonds via oxidation instead of hydrolysis and to enhance enzymatic digestion of recalcitrant substrates including chitin and cellulose. Here, we determined the high-resolution X-ray crystal structures of an enzyme from Neurospora crassa in the resting state and of a copper(II) dioxo intermediate complex formed in the absence of substrate. X-ray crystal structures also revealed “pre-bound” molecular oxygen adjacent to the active site. An examination of protonation states enabled by neutron crystallography and density functional theory calculations identified a role for a conserved histidine in promoting oxygen activation. Our results provide a new structural description of oxygen activation by substrate free lytic polysaccharide monooxygenases and provide insights that can be extended to reactivity in the enzyme–substrate complex.},
doi = {10.1002/ange.201610502},
url = {https://www.osti.gov/biblio/1407721}, journal = {Angewandte Chemie},
issn = {0044-8249},
number = 3,
volume = 129,
place = {United States},
year = {Thu Dec 22 00:00:00 EST 2016},
month = {Thu Dec 22 00:00:00 EST 2016}
}

Works referenced in this record:

Spectroscopic and computational insight into the activation of O2 by the mononuclear Cu center in polysaccharide monooxygenases
journal, June 2014


Production of four Neurospora crassa lytic polysaccharide monooxygenases in Pichia pastoris monitored by a fluorimetric assay
journal, January 2012


Structural Basis for Substrate Targeting and Catalysis by Fungal Polysaccharide Monooxygenases
journal, June 2012


Structure of Jahn–Teller distorted solvated copper(ii) ions in solution, and in solids with apparently regular octahedral coordination geometry
journal, January 2002


Quantum mechanical calculations suggest that lytic polysaccharide monooxygenases use a copper-oxyl, oxygen-rebound mechanism
journal, December 2013


The IMAGINE instrument: first neutron protein structure and new capabilities for neutron macromolecular crystallography
journal, September 2013


Cellobiose Dehydrogenase and a Copper-Dependent Polysaccharide Monooxygenase Potentiate Cellulose Degradation by Neurospora crassa
journal, December 2011


The molecular basis of polysaccharide cleavage by lytic polysaccharide monooxygenases
journal, February 2016


Cellulose Surface Degradation by a Lytic Polysaccharide Monooxygenase and Its Effect on Cellulase Hydrolytic Efficiency
journal, October 2014


Catalase improves saccharification of lignocellulose by reducing lytic polysaccharide monooxygenase-associated enzyme inactivation
journal, November 2015


Structural and Electronic Snapshots during the Transition from a Cu(II) to Cu(I) Metal Center of a Lytic Polysaccharide Monooxygenase by X-ray Photoreduction
journal, May 2014


A high-resolution XAS study of aqueous Cu(II) in liquid and frozen solutions: Pyramidal, polymorphic, and non-centrosymmetric
journal, February 2015


The carbohydrate-active enzymes database (CAZy) in 2013
journal, November 2013


Joint X-ray and neutron refinement with phenix.refine
journal, October 2010


An Oxidative Enzyme Boosting the Enzymatic Conversion of Recalcitrant Polysaccharides
journal, October 2010


Neutron protein crystallography: A complementary tool for locating hydrogens in proteins
journal, July 2016


Probing Oxygen Activation Sites in Two Flavoprotein Oxidases Using Chloride as an Oxygen Surrogate
journal, June 2011


Oxidative Cleavage of Cellulose by Fungal Copper-Dependent Polysaccharide Monooxygenases
journal, December 2011


Cellulose Degradation by Polysaccharide Monooxygenases
journal, June 2015


Expansion of the enzymatic repertoire of the CAZy database to integrate auxiliary redox enzymes
journal, January 2013


Works referencing / citing this record:

Detection and Characterization of a Novel Copper‐Dependent Intermediate in a Lytic Polysaccharide Monooxygenase
journal, November 2019


Molecular mechanism of lytic polysaccharide monooxygenases
journal, January 2018


Is density functional theory accurate for lytic polysaccharide monooxygenase enzymes?
journal, January 2020


Iron oxides with a reverse spinel structure: impact of active sites on molecule adsorption
journal, January 2019


Molecular mechanism of the chitinolytic peroxygenase reaction
journal, January 2020


Molecular mechanism of the chitinolytic monocopper peroxygenase reaction
journal, February 2019


Polysaccharide oxidation by lytic polysaccharide monooxygenase is enhanced by engineered cellobiose dehydrogenase
journal, October 2019


Neutron Crystallography for the Study of Hydrogen Bonds in Macromolecules
journal, April 2017


Targeting the reactive intermediate in polysaccharide monooxygenases
journal, July 2017


Neutron Crystallography for the Study of Hydrogen Bonds in Macromolecules
journal, April 2017