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Identification of Surface-Exposed Protein Radicals and A Substrate Oxidation Site in A-Class Dye-Decolorizing Peroxidase from Thermomonospora curvata

Journal Article · · ACS Catalysis
 [1];  [1];  [2];  [3];  [2];  [1];  [3];  [2];  [1]
  1. Kansas State Univ., Manhattan, KS (United States). Dept. of Chemistry
  2. Kansas State Univ., Manhattan, KS (United States). Dept. of Biochemistry and Molecular Biophysics
  3. Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)

Dye-decolorizing peroxidases (DyPs) are a family of heme peroxidases in which a catalytic distal aspartate is involved in H2O2 activation to catalyze oxidations under acidic conditions. They have received much attention due to their potential applications in lignin compound degradation and biofuel production from biomass. However, the mode of oxidation in bacterial DyPs remains unknown. We have recently reported that the bacterial TcDyP from Thermomonospora curvata is among the most active DyPs and shows activity toward phenolic lignin model compounds. On the basis of the X-ray crystal structure solved at 1.75 Å, sigmoidal steady-state kinetics with Reactive Blue 19 (RB19), and formation of compound II like product in the absence of reducing substrates observed with stopped-flow spectroscopy and electron paramagnetic resonance (EPR), we hypothesized that the TcDyP catalyzes oxidation of large-size substrates via multiple surface-exposed protein radicals. Among 7 tryptophans and 3 tyrosines in TcDyP consisting of 376 residues for the matured protein, W263, W376, and Y332 were identified as surface-exposed protein radicals. Only the W263 was also characterized as one of the surface-exposed oxidation sites. SDS-PAGE and size-exclusion chromatography demonstrated that W376 represents an off-pathway destination for electron transfer, resulting in the cross-linking of proteins in the absence of substrates. Mutation of W376 improved compound I stability and overall catalytic efficiency toward RB19. While Y332 is highly conserved across all four classes of DyPs, its catalytic function in A-class TcDyP is minimal, possibly due to its extremely small solvent-accessible areas. Identification of surface-exposed protein radicals and substrate oxidation sites is important for understanding the DyP mechanism and modulating its catalytic functions for improved activity on phenolic lignin.

Research Organization:
Advanced Photon Source (APS), Argonne National Laboratory (ANL), Argonne, IL (US)
Sponsoring Organization:
USDOE
OSTI ID:
1335976
Journal Information:
ACS Catalysis, Journal Name: ACS Catalysis Journal Issue: 12 Vol. 6; ISSN 2155-5435
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
ENGLISH

References (50)

Lignin Degradation in the Production of Bioethanol - A Review journal April 2016
Redox control of enzymatic functions: The electronics of life's circuitry: Redox Control of Enzymatic Functions journal March 2014
DyP-type peroxidases comprise a novel heme peroxidase family journal December 2008
A robust and extracellular heme-containing peroxidase from Thermobifida fusca as prototype of a bacterial peroxidase superfamily journal December 2009
DyP-type peroxidases: a promising and versatile class of enzymes journal November 2013
Degradation pathway of an anthraquinone dye catalyzed by a unique peroxidase DyP from Thanatephorus cucumeris Dec 1 journal November 2008
Measurement of protein using bicinchoninic acid journal October 1985
Simultaneous determination of hemes a, b, and c from pyridine hemochrome spectra journal February 1987
Interactions of heme proteins with hydrogen peroxide: Protein crosslinking and covalent binding of benzo[a]pyrene and 17β-estradiol journal March 1983
Kinetics of Oxygen Binding to Human Hemoglobin journal May 1974
The myoglobin protein radical. Coupling of Tyr-103 to Tyr-151 in the H2O2-mediated cross-linking of sperm whale myoglobin. journal November 1988
Chemical reactivity of the active site of myoglobin book January 2000
Thirty years of heme peroxidase structural biology journal August 2010
Radical formation on a conserved tyrosine residue is crucial for DyP activity journal September 2013
The toolbox of Auricularia auricula-judae dye-decolorizing peroxidase – Identification of three new potential substrate-interaction sites journal May 2015
The multihued palette of dye-decolorizing peroxidases journal May 2015
Basidiomycete DyPs: Genomic diversity, structural–functional aspects, reaction mechanism and environmental significance journal May 2015
A structural and functional perspective of DyP-type peroxidase family journal May 2015
Various pretreatments of lignocellulosics journal January 2016
Enzymatic conversion of lignin into renewable chemicals journal December 2015
Electron hopping through proteins journal November 2012
Versatile Peroxidase Oxidation of High Redox Potential Aromatic Compounds: Site-directed Mutagenesis, Spectroscopic and Crystallographic Investigation of Three Long-range Electron Transfer Pathways journal November 2005
Horseradish peroxidase: a modern view of a classic enzyme journal February 2004
A Dye-Decolorizing Peroxidase from Vibrio cholerae journal October 2015
Redox-Active Sites in Auricularia auricula-judae Dye-Decolorizing Peroxidase and Several Directed Variants: A Multifrequency EPR Study journal April 2015
Identification of a Porphyrin .pi. Cation Radical in Ascorbate Peroxidase Compound I journal April 1995
Comprehensive explanation of the anomalous EPR spectra of wild-type and mutant cytochrome c peroxidase compound ES journal April 1993
EPR and ENDOR detection of compound I from Micrococcus lysodeikticus catalase journal November 1993
Comparative Electron Paramagnetic Resonance Study of Radical Intermediates in Turnip Peroxidase Isozymes journal June 2001
The Role of Redox-Active Amino Acids on Compound I Stability, Substrate Oxidation, and Protein Cross-Linking in Yeast Cytochrome c Peroxidase journal December 2001
Identification of DypB from Rhodococcus jostii RHA1 as a Lignin Peroxidase journal June 2011
Two Substrate Interaction Sites in Lignin Peroxidase Revealed by Site-Directed Mutagenesis journal October 1998
Redesign of Cytochrome c Peroxidase into a Manganese Peroxidase:  Role of Tryptophans in Peroxidase Activity journal August 1999
Identification and Characterization of a Multifunctional Dye Peroxidase from a Lignin-Reactive Bacterium journal September 2012
Heme Enzyme Structure and Function journal January 2014
Compound ES of Cytochrome c Peroxidase Contains a Trp .pi.-Cation Radical: Characterization by Continuous Wave and Pulsed Q-Band External Nuclear Double Resonance Spectroscopy journal September 1995
Protein-Based Radicals in the Catalase-Peroxidase of Synechocystis PCC6803:  A Multifrequency EPR Investigation of Wild-Type and Variants on the Environment of the Heme Active Site journal October 2003
A dye-decolorizing peroxidase from Bacillus subtilis exhibiting substrate-dependent optimum temperature for dyes and β-ether lignin dimer journal February 2015
Catalytic surface radical in dye-decolorizing peroxidase: a computational, spectroscopic and site-directed mutagenesis study journal February 2015
A kilowatt pulsed 94 GHz electron paramagnetic resonance spectrometer with high concentration sensitivity, high instantaneous bandwidth, and low dead time journal October 2009
Hole hopping through tyrosine/tryptophan chains protects proteins from oxidative damage journal July 2015
First Crystal Structure of a Fungal High-redox Potential Dye-decolorizing Peroxidase: SUBSTRATE INTERACTION SITES AND LONG-RANGE ELECTRON TRANSFER journal December 2012
Characterization of Dye-decolorizing Peroxidase (DyP) from Thermomonospora curvata Reveals Unique Catalytic Properties of A-type DyPs journal July 2015
DyP, a Unique Dye-decolorizing Peroxidase, Represents a Novel Heme Peroxidase Family journal October 2007
PeroxiBase: a database with new tools for peroxidase family classification journal January 2009
PHENIX: a comprehensive Python-based system for macromolecular structure solution journal January 2010
Features and development of Coot journal March 2010
Lignin-degrading enzymes journal February 2015
The Paleozoic Origin of Enzymatic Lignin Decomposition Reconstructed from 31 Fungal Genomes journal June 2012
Purification and Characterization of a Novel Peroxidase from Geotrichum candidum Dec 1 Involved in Decolorization of Dyes journal March 1999

Cited By (5)

Characterization of a New DyP-Peroxidase from the Alkaliphilic Cellulomonad, Cellulomonas bogoriensis journal March 2019
Rational design of heme enzymes for biodegradation of pollutants toward a green future journal June 2019
An Aromatic Dyad Motif in Dye Decolourising Peroxidases Has Implications for Free Radical Formation and Catalysis journal February 2019
Roles of distal aspartate and arginine of B-class dye-decolorizing peroxidase in heterolytic hydrogen peroxide cleavage journal August 2018
Hydrogen bond activation strategy for cyclic carbonates synthesis from epoxides and CO 2 : current state-of-the art of catalyst development and reaction analysis journal November 2018

Figures / Tables (9)


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