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Title: Structural studies of Neurospora crassa LPMO9D and redox partner CDHIIA using neutron crystallography and small-angle scattering

Journal Article · · Carbohydrate Research
 [1]; ORCiD logo [1];  [2];  [1]
  1. North Carolina State Univ., Raleigh, NC (United States). Dept. of Molecular and Structural Biochemistry; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Neutron Sciences Directorate
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Neutron Sciences Directorate

Sensitivity to hydrogen/deuterium and lack of observable radiation damage makes cold neutrons an ideal probe the structural studies of proteins with highly photosensitive groups such as the copper center of lytic polysaccharide monooxygenases (LPMOs) and flavin adenine dinucleotide (FAD) and heme redox cofactors of cellobiose dehydrogenases (CDHs). In this paper, neutron crystallography and small-angle neutron scattering are used to investigate Neurospora crassa LPMO9D (NcLPMO9D) and CDHIIA (NcCDHIIA), respectively. The presence of LPMO greatly enhances the efficiency of commercial glycoside hydrolase cocktails in the depolymerization of cellulose. LPMOs can receive electrons from CDHs to activate molecular dioxygen for the oxidation of cellulose resulting in chain cleavage and disruption of local crystallinity. Using neutron protein crystallography, the hydrogen/deuterium atoms of NcLPMO9D could be located throughout the structure. At the copper active site, the protonation states of the side chains of His1, His84, His157 and Tyr168, and the orientation of water molecules could be determined. Small-angle neutron scattering measurements provided low resolution models of NcCDHIIA with both the dehydrogenase and cytochrome domains in oxidized states that exhibited elongated conformations. Finally, this work demonstrates the suitability of neutron diffraction and scattering for characterizing enzymes critical to oxidative cellulose deconstruction.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); North Carolina State University, Raleigh, NC (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER); USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); USDA National Inst. of Food and Agriculture (NIFA)
Grant/Contract Number:
AC05-00OR22725; MRI 09229719; IGERT1069091; 1010523
OSTI ID:
1424447
Alternate ID(s):
OSTI ID: 1576621
Journal Information:
Carbohydrate Research, Vol. 448; ISSN 0008-6215
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 12 works
Citation information provided by
Web of Science

References (33)

Novel enzymes for the degradation of cellulose journal January 2012
Expansion of the enzymatic repertoire of the CAZy database to integrate auxiliary redox enzymes journal January 2013
Oxygen Activation at the Active Site of a Fungal Lytic Polysaccharide Monooxygenase journal December 2016
Cellulose Degradation by Polysaccharide Monooxygenases journal June 2015
Cellobiose Dehydrogenase: A Versatile Catalyst for Electrochemical Applications journal July 2010
Structural basis for cellobiose dehydrogenase action during oxidative cellulose degradation journal July 2015
Photoreduction of the active site of the metalloprotein putidaredoxin by synchrotron radiation journal August 2007
Towards accurate structural characterization of metal centres in protein crystals: the structures of Ni and Cu T 6 bovine insulin derivatives journal December 2013
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
Lytic polysaccharide monooxygenases: a crystallographer's view on a new class of biomass-degrading enzymes journal October 2016
Limiting radiation damage for high-brilliance biological solution scattering: practical experience at the EMBL P12 beamline PETRAIII journal February 2015
Radiation damage to a protein solution, detected by synchrotron X-ray small-angle scattering: dose-related considerations and suppression by cryoprotectants journal October 2004
Domain Motion in Cytochrome P450 Reductase: CONFORMATIONAL EQUILIBRIA REVEALED BY NMR AND SMALL-ANGLE X-RAY SCATTERING journal October 2009
Redox-Linked Domain Movements in the Catalytic Cycle of Cytochrome P450 Reductase journal September 2013
Neutron protein crystallography: A complementary tool for locating hydrogens in proteins journal July 2016
Crystallization of a fungal lytic polysaccharide monooxygenase expressed from glycoengineered Pichia pastoris for X-ray and neutron diffraction journal January 2017
On the catalytic mechanisms of lytic polysaccharide monooxygenases journal April 2016
The Copper Active Site of CBM33 Polysaccharide Oxygenases journal April 2013
Recent insights into copper-containing lytic polysaccharide mono-oxygenases journal October 2013
The molecular basis of polysaccharide cleavage by lytic polysaccharide monooxygenases journal February 2016
Insights into the oxidative degradation of cellulose by a copper metalloenzyme that exploits biomass components journal August 2011
FoXS, FoXSDock and MultiFoXS: Single-state and multi-state structural modeling of proteins and their complexes based on SAXS profiles journal May 2016
Accurate SAXS Profile Computation and its Assessment by Contrast Variation Experiments journal August 2013
SASSIE: A program to study intrinsically disordered biological molecules and macromolecular ensembles using experimental scattering restraints journal February 2012
Enhancement of enzymatic activity and catalytic current of cellobiose dehydrogenase by calcium ions journal April 2012
Small-angle scattering and 3D structure interpretation journal October 2016
PHENIX: a comprehensive Python-based system for macromolecular structure solution journal January 2010
Characterization of the Two Neurospora crassa Cellobiose Dehydrogenases and Their Connection to Oxidative Cellulose Degradation journal June 2012
The extended Q -range small-angle neutron scattering diffractometer at the SNS journal July 2010
Mantid—Data analysis and visualization package for neutron scattering and μ SR experiments
  • Arnold, O.; Bilheux, J. C.; Borreguero, J. M.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 764 https://doi.org/10.1016/j.nima.2014.07.029
journal November 2014
Determination of the regularization parameter in indirect-transform methods using perceptual criteria journal August 1992
PRIMUS: a Windows PC-based system for small-angle scattering data analysis journal September 2003
Glycan reader: Automated sugar identification and simulation preparation for carbohydrates and glycoproteins journal August 2011

Cited By (4)

Neutron scattering in the biological sciences: progress and prospects journal December 2018
Direct Electron Transfer of Enzymes Facilitated by Cytochromes journal December 2018
Distinct Substrate Specificities and Electron-Donating Systems of Fungal Lytic Polysaccharide Monooxygenases journal May 2018
Direct Electron Transfer of Enzymes Facilitated by Cytochromes journal January 2019