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Crystal Structure of Os79 (Os04g0206600) from Oryza sativa: A UDP-glucosyltransferase Involved in the Detoxification of Deoxynivalenol

Journal Article · · Biochemistry
 [1];  [2];  [1];  [3];  [3];  [4];  [5];  [1]
  1. Univ. of Wisconsin, Madison, WI (United States)
  2. Univ. of Wisconsin, Madison, WI (United States); Univ. of Michigan, Ann Arbor, MI (United States)
  3. National Center for Agricultural Utilization Research, Peoria, IL (United States)
  4. Univ. of Natural Resources and Life Sciences, Vienna (BOKU), Tulln (Austria)
  5. Univ. of Natural Resources and Life Sciences, Tulln (Austria)

Fusarium head blight is a plant disease with significant agricultural and health impact which affects cereal crops such as wheat, barley, and maize and is characterized by reduced grain yield and the accumulation of trichothecene mycotoxins such as deoxynivalenol (DON). Studies have identified trichothecene production as a virulence factor in Fusarium graminearum and have linked DON resistance to the ability to form DON-3-O-glucoside in wheat. Here, the structures of a deoxynivalenol:UDP-glucosyltransferase (Os79) from Oryza sativa are reported in complex with UDP in an open conformation, in complex with UDP in a closed conformation, and in complex with UDP-2-fluoro-2-deoxy-d-glucose and trichothecene at 1.8, 2.3, and 2.2 Å resolution, respectively. The active site of Os79 lies in a groove between the N-terminal acceptor and the C-terminal donor-binding domains. Structural alignments reveal that Os79 likely utilizes a catalytic mechanism similar to those of other plant UGTs, with His 27 activating the trichothecene O3 hydroxyl for nucleophilic attack at C1' of the UDP-glucose donor. Kinetic analysis of mutant Os79 revealed that Thr 291 plays a critical role in catalysis as a catalytic acid or to position the UDP moiety during the nucleophilic attack. Steady-state kinetic analysis demonstrated that Os79 conjugates multiple trichothecene substrates such as DON, nivalenol, isotrichodermol, and HT-2 toxin, but not T-2 toxin. Furthermore, these data establish a foundation for understanding substrate specificity and activity in this enzyme and can be used to guide future efforts to increase DON resistance in cereal crops.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Energy Research (ER); USDA
Grant/Contract Number:
W-31109-ENG-38
OSTI ID:
1332566
Journal Information:
Biochemistry, Journal Name: Biochemistry Journal Issue: 44 Vol. 55; ISSN 0006-2960
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
ENGLISH

References (52)

Structural basis for acceptor-substrate recognition of UDP-glucose: anthocyanidin 3- O -glucosyltransferase from Clitoria ternatea : Crystal Structures of UGT78K6 in Complex with Flavonoids journal January 2015
Atomic Structures of the Human Immunophilin FKBP-12 Complexes with FK506 and Rapamycin journal January 1993
The Trichothecenes and Their Biosynthesis book January 2007
Deoxynivalenol: mechanisms of action, human exposure, and toxicological relevance journal August 2010
Molecular cloning and characterization of an up-regulated UDP-glucosyltransferase gene induced by DON from Triticum aestivum L. cv. Wangshuibai journal July 2009
Enzymatic synthesis of UDP-(3-deoxy-3-fluoro)-d-galactose and UDP-(2-deoxy-2-fluoro)-d-galactose and substrate activity with UDP-galactopyranose mutase journal October 2000
On the origin of family 1 plant glycosyltransferases journal February 2003
Density modification for macromolecular phase improvement journal October 1999
A chemoenzymatic synthesis of UDP-(2-deoxy-2-fluoro)galactose and evaluation of its interaction with galactosyltransferase journal March 1997
Global molecular surveillance reveals novel Fusarium head blight species and trichothecene toxin diversity journal November 2007
RF cloning: A restriction-free method for inserting target genes into plasmids journal April 2006
Crystal Structure of Medicago truncatula UGT85H2 – Insights into the Structural Basis of a Multifunctional (Iso)flavonoid Glycosyltransferase journal July 2007
Crystal Structures of Glycosyltransferase UGT78G1 Reveal the Molecular Basis for Glycosylation and Deglycosylation of (Iso)flavonoids journal October 2009
A combined approach to improving large-scale production of tobacco etch virus protease journal September 2007
Construction and use of new cloning vectors for the rapid isolation of recombinant proteins from Escherichia coli journal May 2008
Workshop on trichothecenes with a focus on DON: summary report journal October 2004
Polymorphism of trichothecene biosynthesis genes in deoxynivalenol-and nivalenol-producing Fusarium graminearum isolates journal February 2003
Structure-activity studies of trichothecenes: cytotoxicity of analogs and reaction products derived from T-2 toxin and neosolaniol journal March 1989
Structure of a flavonoid glucosyltransferase reveals the basis for plant natural product modification journal February 2006
Biosynthesis of 2-cis-farnesol journal January 1973
Crystal structure of the MurG:UDP-GlcNAc complex reveals common structural principles of a superfamily of glycosyltransferases journal January 2003
Infection patterns in barley and wheat spikes inoculated with wild-type and trichodiene synthase gene disrupted Fusarium graminearum journal November 2005
Characterization and engineering of the bifunctional N- and O-glucosyltransferase involved in xenobiotic metabolism in plants journal December 2007
Mechanism of Inhibition of Eukaryotic Protein Synthesis by Trichothecene Fungal Toxins journal January 1974
Detoxification of the Fusarium Mycotoxin Deoxynivalenol by a UDP-glucosyltransferase from Arabidopsis thaliana journal September 2003
Biogeography of Fusarium graminearum species complex and chemotypes: a review journal November 2014
Protein sequence alignments: a strategy for the hierarchical analysis of residue conservation journal January 1993
Jalview Version 2--a multiple sequence alignment editor and analysis workbench journal January 2009
Transgenic Wheat Expressing a Barley UDP-Glucosyltransferase Detoxifies Deoxynivalenol and Provides High Levels of Resistance to Fusarium graminearum journal November 2015
Functional Characterization of Two Clusters of Brachypodium distachyon UDP-Glycosyltransferases Encoding Putative Deoxynivalenol Detoxification Genes journal July 2013
The Ability to Detoxify the Mycotoxin Deoxynivalenol Colocalizes With a Major Quantitative Trait Locus for Fusarium Head Blight Resistance in Wheat journal December 2005
Transcriptome Analysis of the Barley–Deoxynivalenol Interaction: Evidence for a Role of Glutathione in Deoxynivalenol Detoxification journal July 2010
Validation of a Candidate Deoxynivalenol-Inactivating UDP-Glucosyltransferase from Barley by Heterologous Expression in Yeast journal July 2010
Reduced Virulence of Gibberella zeae Caused by Disruption of a TrichotheceneToxin Biosynthetic Gene journal January 1995
A Brachypodium UDP-Glycosyltransferase Confers Root Tolerance to Deoxynivalenol and Resistance to Fusarium Infection journal July 2016
Crystal Structures of a Multifunctional Triterpene/Flavonoid Glycosyltransferase from Medicago truncatula journal October 2005
Phaser crystallographic software journal July 2007
Substructure solution with SHELXD journal September 2002
Coot model-building tools for molecular graphics journal November 2004
HKL -3000: the integration of data reduction and structure solution – from diffraction images to an initial model in minutes journal July 2006
The Buccaneer software for automated model building. 1. Tracing protein chains journal August 2006
PHENIX: a comprehensive Python-based system for macromolecular structure solution journal January 2010
Refinement of Macromolecular Structures by the Maximum-Likelihood Method journal May 1997
Crystal structure of UDP-glucose:anthocyanidin 3- O -glucosyltransferase from Clitoria ternatea journal September 2013
Genomics-based selection and functional characterization of triterpene glycosyltransferases from the model legume Medicago truncatula: Biosynthesis of saponins journal February 2005
A genome-wide phylogenetic reconstruction of family 1 UDP-glycosyltransferases revealed the expansion of the family during the adaptation of plants to life on land: Phylogeny reconstruction of plant family 1 UGTs journal December 2011
Heterologous Expression of Arabidopsis UDP-Glucosyltransferases in Saccharomyces cerevisiae for Production of Zearalenone-4- O -Glucoside journal June 2006
Fusarium Tri4 encodes a multifunctional oxygenase required for trichothecene biosynthesis journal July 2006
Glycosyltransferases: Structures, Functions, and Mechanisms journal June 2008
Multiple secondary plant product UDP-glucose glucosyltransferase genes expressed in cassava (Manihot esculenta Crantz) cotyledons journal January 1994
Trichothecenes: From Simple to Complex Mycotoxins journal July 2011
Biochemical Characterization of a Recombinant UDP-glucosyltransferase from Rice and Enzymatic Production of Deoxynivalenol-3-O-β-D-glucoside journal July 2015

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Enzymes for Detoxification of Various Mycotoxins: Origins and Mechanisms of Catalytic Action journal June 2019
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Fusarium mycotoxins: a trans-disciplinary overview journal February 2018
Intestinal hydrolysis and microbial biotransformation of diacetoxyscirpenol-α-glucoside, HT-2-β-glucoside and N -(1-deoxy- d -fructos-1-yl) fumonisin B 1 by human gut microbiota in vitro journal December 2019
A novel glycosyltransferase catalyses the transfer of glucose to glucosylated anthocyanins in purple sweet potato journal August 2018
Crystal structures of rhamnosyltransferase UGT 89C1 from Arabidopsis thaliana reveal the molecular basis of sugar donor specificity for UDP ‐β‐ l ‐rhamnose and rhamnosylation mechanism journal April 2019
UDP-Glucosyltransferases from Rice, Brachypodium, and Barley: Substrate Specificities and Synthesis of Type A and B Trichothecene-3-O-β-d-glucosides journal March 2018