1
|
Liu B, Wang W, Qiu J, Huang X, Qiu S, Bao Y, Xu S, Ruan L, Ran T, He J. Crystal structures of herbicide-detoxifying esterase reveal a lid loop affecting substrate binding and activity. Nat Commun 2023; 14:4343. [PMID: 37468532 DOI: 10.1038/s41467-023-40103-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Accepted: 07/11/2023] [Indexed: 07/21/2023] Open
Abstract
SulE, an esterase, which detoxifies a variety of sulfonylurea herbicides through de-esterification, provides an attractive approach to remove environmental sulfonylurea herbicides and develop herbicide-tolerant crops. Here, we determined the crystal structures of SulE and an activity improved mutant P44R. Structural analysis revealed that SulE is a dimer with spacious binding pocket accommodating the large sulfonylureas substrate. Particularly, SulE contains a protruding β hairpin with a lid loop covering the active site of the other subunit of the dimer. The lid loop participates in substrate recognition and binding. P44R mutation altered the lid loop flexibility, resulting in the sulfonylurea heterocyclic ring repositioning to a relative stable conformation thus leading to dramatically increased activity. Our work provides important insights into the molecular mechanism of SulE, and establish a solid foundation for further improving the enzyme activity to various sulfonylurea herbicides through rational design.
Collapse
Affiliation(s)
- Bin Liu
- Key Laboratory of Agricultural Environmental Microbiology of Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
- College of Life Sciences, Jiangxi Normal University, Nanchang, 330022, China
| | - Weiwu Wang
- Key Laboratory of Agricultural Environmental Microbiology of Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Jiguo Qiu
- Key Laboratory of Agricultural Environmental Microbiology of Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Xing Huang
- Key Laboratory of Agricultural Environmental Microbiology of Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Shenshen Qiu
- Key Laboratory of Agricultural Environmental Microbiology of Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yixuan Bao
- Key Laboratory of Agricultural Environmental Microbiology of Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Siqiong Xu
- Key Laboratory of Agricultural Environmental Microbiology of Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Luyao Ruan
- Key Laboratory of Agricultural Environmental Microbiology of Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Tingting Ran
- Key Laboratory of Agricultural Environmental Microbiology of Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China.
| | - Jian He
- Key Laboratory of Agricultural Environmental Microbiology of Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China.
| |
Collapse
|
2
|
Aguiar ASN, Costa RF, Borges LL, Dias LD, Camargo AJ, Napolitano HB. Molecular basis of two pyrimidine-sulfonylurea herbicides: from supramolecular arrangement to acetolactate synthase inhibition. J Mol Model 2023; 29:241. [PMID: 37436478 DOI: 10.1007/s00894-023-05629-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Accepted: 06/21/2023] [Indexed: 07/13/2023]
Abstract
CONTEXT The design and synthesis of safe and highly active sulfonylurea herbicides is still a challenge. Therefore, following some principles of structure-activity relationship (SAR) of sulfonylurea herbicides, this work focuses on evaluating two sulfonylurea derivatives bearing electron-withdrawing substituents, namely, -(CO)OCH3 and -NO2 on the aryl group, on herbicidal activity. To understand the effects caused by the substituent groups, the molecular and electronic structures of the sulfonylureas were evaluated by density functional theory. Likewise, the crystalline supramolecular arrangements of both compounds were analyzed by Hirshfeld surface, QTAIM, and NBO, with the aim of verifying changes in intermolecular interactions caused by substituent groups. Finally, through a toxicophoric analysis, we were able to predict the interacting groups in their biological target, acetolactate synthase, and verify the interactions with the binding site. METHODS All theoretical calculations were conducted using the highly parameterized empirical exchange-correlation functional M06-2X accompanied by the diffuse and polarized basis set 6-311++G(d,p). The atomic coordinates were obtained directly from the crystalline structures, and from the energies of the frontier molecular orbitals (HOMO and LUMO), chemical descriptors were obtained that indicated the influence of the functional groups in the sulfonylureas on the reactivity of the molecules. The intermolecular interactions in the crystals were analyzed using the Hirshfeld, QTAIM, and NBO surfaces. Toxicophoric modeling was performed by the PharmaGist webserver and molecular docking calculations were performed by the GOLD 2022.1.0 software package so that the ligand was fitted to the binding site in a 10 Å sphere. For this, genetic algorithm parameters were used using the ChemPLP scoring function for docking and ASP for redocking.
Collapse
Affiliation(s)
- Antônio S N Aguiar
- Grupo de Química Teórica e Estrutural de Anápolis, Universidade Estadual de Goiás, Anápolis, GO, Brazil.
| | - Rogério F Costa
- Grupo de Química Teórica e Estrutural de Anápolis, Universidade Estadual de Goiás, Anápolis, GO, Brazil
| | - Leonardo L Borges
- Grupo de Química Teórica e Estrutural de Anápolis, Universidade Estadual de Goiás, Anápolis, GO, Brazil
- Escola de Ciências Médicas e da Vida, Pontifícia Universidade Católica de Goiás, Goiânia, GO, Brazil
| | - Lucas D Dias
- Grupo de Química Teórica e Estrutural de Anápolis, Universidade Estadual de Goiás, Anápolis, GO, Brazil
- Laboratório de Novos Materiais, Universidade Evangélica de Goiás, Anápolis, GO, 75083-515, Brazil
| | - Ademir J Camargo
- Grupo de Química Teórica e Estrutural de Anápolis, Universidade Estadual de Goiás, Anápolis, GO, Brazil
| | - Hamilton B Napolitano
- Grupo de Química Teórica e Estrutural de Anápolis, Universidade Estadual de Goiás, Anápolis, GO, Brazil.
- Laboratório de Novos Materiais, Universidade Evangélica de Goiás, Anápolis, GO, 75083-515, Brazil.
| |
Collapse
|
3
|
Cheng Y, Lonhienne T, Garcia MD, Williams CM, Schenk G, Guddat LW. Crystal Structure of the Commercial Herbicide, Amidosulfuron, in Complex with Arabidopsis thaliana Acetohydroxyacid Synthase. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:5117-5126. [PMID: 36943718 DOI: 10.1021/acs.jafc.2c08528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Amidosulfuron (AS) is from the commercial sulfonylurea herbicide family. It is highly effective against dicot broad-leaf weeds. This herbicide targets acetohydroxyacid synthase (AHAS), the first enzyme in the branched chain amino acid biosynthesis pathway. Here, we have determined the crystal structure of AS in complex with wildtype Arabidopsis thaliana AHAS (AtAHAS) and with the resistance mutant, S653T. In both structures, the cofactor, ThDP, is modified to a peracetate adduct, consistent with time-dependent accumulative inhibition. Compared to other AHAS-inhibiting herbicides of the sulfonylurea family, AS lacks a second aromatic ring. The replacement is an aryl sulfonyl group with a reduced number of interactions with the enzyme and relatively low affinity (Ki = 4.2 μM vs low nM when two heteroaromatic rings are present). This study shows that effective herbicides can have a relatively high Ki for plant AHAS but can still be a potent herbicide provided accumulative inhibition also occurs.
Collapse
Affiliation(s)
- Yan Cheng
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane 4072, Australia
| | - Thierry Lonhienne
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane 4072, Australia
| | - Mario D Garcia
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane 4072, Australia
| | - Craig M Williams
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane 4072, Australia
| | - Gerard Schenk
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane 4072, Australia
| | - Luke W Guddat
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane 4072, Australia
| |
Collapse
|
4
|
Zhou S, Zhao LT, Meng FF, Hua XW, Li YH, Liu B, Chen J, Chen AL, Li ZM. Synthesis, herbicidal activity and soil degradation of novel 5-substituted sulfonylureas as AHAS inhibitors. PEST MANAGEMENT SCIENCE 2022; 78:5313-5324. [PMID: 36054636 DOI: 10.1002/ps.7153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 08/03/2022] [Accepted: 08/27/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND Chlorsulfuron, metsulfuron-methyl and ethametsulfuron can damage sensitive crops in rotation pattern as a result of their long persistence in soil. To explore novel sulfonylurea (SU) herbicides with favorable soil degradation rates, four series of SUs were synthesized through a structure-based drug design (SBDD) strategy. RESULTS The target compounds, especially Ia, Id and Ie, exhibited prospective herbicidal activity against dicotyledon oil seed rape (Brassica campestris), amaranth (Amaranthus retroflexus), monocotyledon barnyard grass (Echinochloa crusgalli) and crab grass (Digitaria sanguinalis) at a concentration of 15 a.i. g ha-1 . Additionally, Ia, Id and Ig displayed excellent inhibitory effects against AtAHAS, with Kapp i values of 59.1, 34.5 and 71.8 μm, respectively, which were much lower than that of chlorsulfuron at 149.4 μm. The π-π stack and H-bonds between the Ia conformation and AtAHAS in the molecular docking results confirmed the series of compounds to be conventional AHAS inhibitors. In alkaline soil (pH = 8.46), compounds Ia-Ig revealed various degrees of acceleration in the degradation rate compared with chlorsulfuron. Besides, compound Ia showed considerable wheat and corn safety under postemergence at the concentration of 30, 60 and even 120 a.i. g ha-1 . CONCLUSION Overall, based on the synthetic procedure, herbicidal activity, soil degradation and crop safety, the Ia sulfonylureas series were chosen to be investigated as prospective AHAS inhibitors. The 5-dimethylamino group on SUs accelerated the degradation rate at different levels in alkaline soils which seems to be controllable in conventional cropping systems in their further application. © 2022 Society of Chemical Industry.
Collapse
Affiliation(s)
- Sha Zhou
- Collaborative Innovation Center of Green Pesticide, National Joint Engineering Laboratory of Biopesticide Preparation, Zhejiang A&F University State Key Laboratory of Subtropical Silviculture, College of Forestry and Biotechnology, Zhejiang A & F University, Hangzhou, China
- State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), College of Chemistry, Nankai University, Tianjin, China
| | - Lv-Ting Zhao
- Collaborative Innovation Center of Green Pesticide, National Joint Engineering Laboratory of Biopesticide Preparation, Zhejiang A&F University State Key Laboratory of Subtropical Silviculture, College of Forestry and Biotechnology, Zhejiang A & F University, Hangzhou, China
| | - Fan-Fei Meng
- State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), College of Chemistry, Nankai University, Tianjin, China
| | - Xue-Wen Hua
- College of Agriculture, Liaocheng University, Liaocheng, China
| | - Yong-Hong Li
- State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), College of Chemistry, Nankai University, Tianjin, China
| | - Bin Liu
- State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), College of Chemistry, Nankai University, Tianjin, China
| | - Jie Chen
- Collaborative Innovation Center of Green Pesticide, National Joint Engineering Laboratory of Biopesticide Preparation, Zhejiang A&F University State Key Laboratory of Subtropical Silviculture, College of Forestry and Biotechnology, Zhejiang A & F University, Hangzhou, China
| | - An-Liang Chen
- Collaborative Innovation Center of Green Pesticide, National Joint Engineering Laboratory of Biopesticide Preparation, Zhejiang A&F University State Key Laboratory of Subtropical Silviculture, College of Forestry and Biotechnology, Zhejiang A & F University, Hangzhou, China
| | - Zheng-Ming Li
- State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), College of Chemistry, Nankai University, Tianjin, China
| |
Collapse
|
5
|
Navarro-León E, Borda E, Marín C, Sierras N, Blasco B, Ruiz JM. Application of an Enzymatic Hydrolysed L-α-Amino Acid Based Biostimulant to Improve Sunflower Tolerance to Imazamox. PLANTS (BASEL, SWITZERLAND) 2022; 11:2761. [PMID: 36297785 PMCID: PMC9611503 DOI: 10.3390/plants11202761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 10/17/2022] [Accepted: 10/17/2022] [Indexed: 06/16/2023]
Abstract
Herbicides, commonly used in agriculture to control weeds, often cause negative effects on crops. Safeners are applied to reduce the damage to crops without affecting the effectiveness of herbicides against weeds. Plant biostimulants have the potential to increase tolerance to a series of abiotic stresses, but very limited information exists about their effects on herbicide-stressed plants. This study aims to verify whether the application of a potential safener such as Terra-Sorb®, an L-α-amino acid-based biostimulant, reduces the phytotoxicity of an Imazamox-based herbicide and to elucidate which tolerance mechanisms are induced. Sunflower plants were treated with Pulsar® 40 (4% Imazamox) both alone and in combination with Terra-Sorb®. Plants treated with the herbicide in combination with Terra-Sorb® showed higher growth, increased acetolactate synthase (ALS) activity, and amino acid concentration with respect to the plants treated with Imazamox alone. Moreover, the biostimulant protected photosynthetic activity and reduced oxidative stress. This protective effect could be due to the glutathione S-transferase (GST) induction and antioxidant systems dependent on glutathione (GSH). However, no effect of the biostimulant application was observed regarding phenolic compound phenylalanine ammonium-lyase (PAL) activity. Therefore, this study opens the perspective of using Terra-Sorb® in protecting sunflower plants against an imazamox-based herbicide effect.
Collapse
Affiliation(s)
- Eloy Navarro-León
- Department of Plant Physiology, Faculty of Sciences, University of Granada, 18071 Granada, Spain
| | - Elisabet Borda
- R & D Plant Health, Bioiberica S.A.U., 08389 Barcelona, Spain
| | - Cándido Marín
- R & D Plant Health, Bioiberica S.A.U., 08389 Barcelona, Spain
| | - Nuria Sierras
- R & D Plant Health, Bioiberica S.A.U., 08389 Barcelona, Spain
| | - Begoña Blasco
- Department of Plant Physiology, Faculty of Sciences, University of Granada, 18071 Granada, Spain
| | - Juan M. Ruiz
- Department of Plant Physiology, Faculty of Sciences, University of Granada, 18071 Granada, Spain
| |
Collapse
|
6
|
Galili S, Hershenhorn J, Edelman M, Sobolev V, Smirnov E, Amir-Segev O, Bellalou A, Dor E. Novel Mutation in the Acetohydroxyacid Synthase (AHAS), Gene Confers Imidazolinone Resistance in Chickpea Cicer arietinum L. Plants. PLANTS 2021; 10:plants10122791. [PMID: 34961262 PMCID: PMC8704328 DOI: 10.3390/plants10122791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 12/07/2021] [Accepted: 12/10/2021] [Indexed: 11/17/2022]
Abstract
Chickpea (Cicer arietinum L.) is an important crop in crop-rotation management in Israel. Imidazolinone herbicides have a wide spectrum of weed control, but chickpea plants are sensitive to acetohydroxyacid synthase (AHAS; also known as acetolactate synthase [ALS]) inhibitors. Using the chemical mutagen ethyl methanesulfonate (EMS), we developed a chickpea line (M2033) that is resistant to imidazolinone herbicides. A point mutation was detected in one of the two genes encoding the AHAS catalytic subunit of M2033. The transition of threonine to isoleucine at position 192 (203 according to Arabidopsis) conferred resistance of M2033 to imidazolinones, but not to other groups of AHAS inhibitors. The role of this substitution in the resistance of line M2033 was proven by genetic transformation of tobacco plants. This resistance showed a single-gene semidominant inheritance pattern. Conclusion: A novel mutation, T192I (T203I according to Arabidopsis), providing resistance to IMI herbicides but not to other groups of AHAS inhibitors, is described in the AHAS1 protein of EMS-mutagenized chickpea line M2033.
Collapse
Affiliation(s)
- Shmuel Galili
- Institute of Plant Sciences, The Volcani Center, Agricultural Research Organization, P.O. Box 15159, HaMaccabim Road 68, Rishon LeZion 7528809, Israel; (O.A.-S.); (A.B.)
- Correspondence: (S.G.); (E.D.)
| | - Joseph Hershenhorn
- Newe Ya’ar Research Center, Agricultural Research Organization, P.O. Box 1021, Ramat Yishay 3009503, Israel; (J.H.); (E.S.)
| | - Marvin Edelman
- Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot 76100, Israel; (M.E.); (V.S.)
| | - Vladimir Sobolev
- Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot 76100, Israel; (M.E.); (V.S.)
| | - Evgeny Smirnov
- Newe Ya’ar Research Center, Agricultural Research Organization, P.O. Box 1021, Ramat Yishay 3009503, Israel; (J.H.); (E.S.)
| | - Orit Amir-Segev
- Institute of Plant Sciences, The Volcani Center, Agricultural Research Organization, P.O. Box 15159, HaMaccabim Road 68, Rishon LeZion 7528809, Israel; (O.A.-S.); (A.B.)
| | - Aharon Bellalou
- Institute of Plant Sciences, The Volcani Center, Agricultural Research Organization, P.O. Box 15159, HaMaccabim Road 68, Rishon LeZion 7528809, Israel; (O.A.-S.); (A.B.)
| | - Evgenia Dor
- Newe Ya’ar Research Center, Agricultural Research Organization, P.O. Box 1021, Ramat Yishay 3009503, Israel; (J.H.); (E.S.)
- Correspondence: (S.G.); (E.D.)
| |
Collapse
|
7
|
Li JH, Li RH, Wang Y, Li SX, Wu YP, Zhang J, Zhu YG, Xie BJ. Synthesis, herbicidal activity, enzyme activity, and molecular docking of novel aniline thiourea. PHOSPHORUS SULFUR 2021. [DOI: 10.1080/10426507.2021.1901702] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Jia hui Li
- College of Plant Protection, Jilin Agricultural University, Changchun, PR China
| | - Ran hong Li
- College of Plant Protection, Jilin Agricultural University, Changchun, PR China
| | - Yan Wang
- College of Plant Protection, Jilin Agricultural University, Changchun, PR China
| | - Sui xin Li
- College of Plant Protection, Jilin Agricultural University, Changchun, PR China
| | - Yun peng Wu
- College of Plant Protection, Jilin Agricultural University, Changchun, PR China
| | - Jing Zhang
- College of Plant Protection, Jilin Agricultural University, Changchun, PR China
| | - Yong gang Zhu
- College of Plant Protection, Jilin Agricultural University, Changchun, PR China
| | - Bei jie Xie
- College of Plant Protection, Jilin Agricultural University, Changchun, PR China
| |
Collapse
|
8
|
Xie L, Zang X, Cheng W, Zhang Z, Zhou J, Chen M, Tang Y. Harzianic Acid from Trichoderma afroharzianum Is a Natural Product Inhibitor of Acetohydroxyacid Synthase. J Am Chem Soc 2021; 143:10.1021/jacs.1c03988. [PMID: 34132537 PMCID: PMC8674378 DOI: 10.1021/jacs.1c03988] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Acetohydroxyacid synthase (AHAS) is the first enzyme in the branched-chain amino acid biosynthetic pathway and is a validated target for herbicide and fungicide development. Here we report harzianic acid (HA, 1) produced by the biocontrol fungus Trichoderma afroharzianum t-22 (Tht22) as a natural product inhibitor of AHAS. The biosynthetic pathway of HA was elucidated with heterologous reconstitution. Guided by a putative self-resistance enzyme in the genome, HA was biochemically demonstrated to be a selective inhibitor of fungal AHAS, including those from phytopathogenic fungi. In addition, HA can inhibit a common resistant variant of AHAS in which the active site proline is mutated. Structural analysis of AHAS complexed with HA revealed the molecular basis of competitive inhibition, which differs from all known commercial AHAS inhibitors. The alternative binding mode also rationalizes the selectivity of HA, as well as effectiveness toward resistant mutants. A proposed role of HA biosynthesis by Tht22 in the rhizosphere is discussed based on the data.
Collapse
Affiliation(s)
- Linan Xie
- Department of Chemical and Biomolecular Engineering, University of California Los Angeles, Los Angeles, California 90095, United States
- Biotechnology Research Institute, The Chinese Academy of Agricultural Sciences, 12 Zhongguancun South Street, Beijing 100081, P.R. China
| | - Xin Zang
- State Key Laboratory of Bio-organic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Shanghai 200032, China
| | - Wei Cheng
- Department of Chemical and Biomolecular Engineering, University of California Los Angeles, Los Angeles, California 90095, United States
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing 100191, China
| | - Zhuan Zhang
- Texas Therapeutics Institute, the Brown Foundation Institute of Molecular Medicine, The University of Texas Health Science Center at Houston, Houston, Texas 77054, United States
| | - Jiahai Zhou
- State Key Laboratory of Bio-organic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Shanghai 200032, China
- CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Mengbin Chen
- Department of Chemical and Biomolecular Engineering, University of California Los Angeles, Los Angeles, California 90095, United States
| | - Yi Tang
- Department of Chemical and Biomolecular Engineering, University of California Los Angeles, Los Angeles, California 90095, United States
- Chemistry and Biochemistry, University of California Los Angeles, Los Angeles, California 90095, United States
| |
Collapse
|
9
|
Alvarado O, García-Meseguer R, Ruiz-Pernía JJ, Tuñon I, Delgado EJ. Mechanistic study of the biosynthesis of R-phenylacetylcarbinol by acetohydroxyacid synthase enzyme using hybrid quantum mechanics/molecular mechanics simulations. Arch Biochem Biophys 2021; 707:108849. [PMID: 33832752 DOI: 10.1016/j.abb.2021.108849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The biosynthesis of R-phenylacetylcarbinol (R-PAC) by the acetohydroxy acid synthase, (AHAS) is addressed by molecular dynamics simulations (MD), hybrid quantum mechanics/molecular mechanics (QM/MM), and QM/MM free energy calculations. The results show the reaction starts with the nucleophilic attack of the C2α atom of the HEThDP intermediate on the Cβ atom of the carbonyl group of benzaldehyde substrate via the formation of a transition state (TS1) with the HEThDP intermediate under 4'-aminopyrimidium (APH+) form. The calculated activation free energy for this step is 17.4 kcal mol-1 at 27 °C. From this point, the reaction continues with the abstraction of Hβ atom of the HEThDP intermediate by the Oβ atom of benzaldehyde to form the intermediate I. The reaction is completed with the cleavage of the bond C2α-C2 to form the product R-PAC and to regenerate the ylide intermediate under the APH+ form, allowing in this way to reinitiate to the catalytic cycle once more. The calculated activation barrier for this last step is 15.9 kcal mol-1 at 27 °C.
Collapse
Affiliation(s)
- Omar Alvarado
- Departamento de Físico-Química, Facultad de Ciencias Químicas, Universidad de Concepción, Concepción, Chile; Departamento de Química, Facultad de Ciencias, Universidad del Bío-Bío, Avenida Collao 1202, Concepción, Chile
| | - Rafael García-Meseguer
- School of Mathematics, University of Bristol, Bristol, UK; Department of Physical Chemistry, Universitat de Valencia, 46100, Burjassot, Spain
| | | | - Iñaki Tuñon
- Department of Physical Chemistry, Universitat de Valencia, 46100, Burjassot, Spain
| | - Eduardo J Delgado
- Departamento de Físico-Química, Facultad de Ciencias Químicas, Universidad de Concepción, Concepción, Chile.
| |
Collapse
|
10
|
Alvarado O, García-Meseguer R, Ruiz-Pernía JJ, Tuñon I, Delgado EJ. Mechanistic study of the biosynthesis of R-phenylcarbinol by acetohydroxyacid synthase enzyme using hybrid quantum mechanics/molecular mechanics simulations. Arch Biochem Biophys 2021; 701:108807. [PMID: 33587902 DOI: 10.1016/j.abb.2021.108807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 02/06/2021] [Accepted: 02/08/2021] [Indexed: 11/26/2022]
Abstract
The biosynthesis of R-phenylacetylcarbinol (R-PAC) by the acetohydroxy acid synthase, (AHAS) is addressed by molecular dynamics simulations (MD), hybrid quantum mechanics/molecular mechanics (QM/MM), and QM/MM free energy calculations. The results show the reaction starts with the nucleophilic attack of the C2α atom of the HEThDP intermediate on the Cβ atom of the carbonyl group of benzaldehyde substrate via the formation of a transition state (TS1) with the HEThDP intermediate under 4'-aminopyrimidium (APH+) form. The calculated activation free energy for this step is 17.4kcal mol-1 at 27 °C. From this point, the reaction continues with the abstraction of Hβ atom of the HEThDP intermediate by the Oβ atom of benzaldehyde to form the intermediate I. The reaction is completed with the cleavage of the bond C2α-C2 to form the product R-PAC and to regenerate the ylide intermediate under the APH+ form, allowing in this way to reinitiate to the catalytic cycle once more. The calculated activation barrier for this last step is 15.9kcal mol-1 at 27 °C.
Collapse
Affiliation(s)
- Omar Alvarado
- Departamento de Físico-Química, Facultad de Ciencias Químicas, Universidad de Concepción, Concepción, Chile; Departamento de Química, Facultad de Ciencias, Universidad del Bío-Bío, Avenida Collao 1202, Concepción, Chile
| | - Rafael García-Meseguer
- School of Mathematics, University of Bristol, Bristol, United Kingdom; Department of Physical Chemistry, Universitat de Valencia, 46100, Burjassot, Spain
| | | | - Iñaki Tuñon
- Department of Physical Chemistry, Universitat de Valencia, 46100, Burjassot, Spain
| | - Eduardo J Delgado
- Departamento de Físico-Química, Facultad de Ciencias Químicas, Universidad de Concepción, Concepción, Chile.
| |
Collapse
|
11
|
Li JH, Wang Y, Wu YP, Li RH, Liang S, Zhang J, Zhu YG, Xie BJ. Synthesis, herbicidal activity study and molecular docking of novel pyrimidine thiourea. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2021; 172:104766. [PMID: 33518053 DOI: 10.1016/j.pestbp.2020.104766] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 12/16/2020] [Accepted: 12/19/2020] [Indexed: 06/12/2023]
Abstract
According to the pharmacophore binding strategy and principle of bioelectronic isobaric, used the sulfonylurea bridge as the parent structure, a series of novel thiourea compounds containing aromatic-substituted pyrimidines were designed and synthesized. The preliminary herbicidal activity tests showed that some compounds had good herbicidal activity against Digitaria adscendens, Amaranthus retroflexus, especially for compound 4d and 4f. The results showed that compound 4d had an inhibition rate of 81.5% on the root growth of Brassica napus L. at the concentration of 100 mg L-1, and compound 4f had an inhibition rate of 81% on the root growth of Digitaria adscendens at the concentration of 100 mg L-1. Compounds 4d and 4f had higher comparative activity on Echinochloa crus-galli than the commercial herbicide bensulfuron-methyl. The preliminary structure-activity relationship (SAR) was also summarized. We also tested the in vivo AHAS enzyme activity inhibition experiment of 14 compounds at 100 mg L-1, and the results showed that they all have inhibitory activity on the enzyme, with the highest inhibition rate reaching 44.4% (compound 4d). Based on the results of molecular docking to yeast acetohydroxyacid synthase (AHAS), the possible herbicidal activity mechanism of these compounds was evaluated.
Collapse
Affiliation(s)
- Jia-Hui Li
- College of Plant Protection, Jilin Agricultural University, Changchun, PR China
| | - Yan Wang
- College of Plant Protection, Jilin Agricultural University, Changchun, PR China.
| | - Yun-Peng Wu
- College of Plant Protection, Jilin Agricultural University, Changchun, PR China
| | - Ran-Hong Li
- College of Plant Protection, Jilin Agricultural University, Changchun, PR China
| | - Shuang Liang
- College of Plant Protection, Jilin Agricultural University, Changchun, PR China
| | - Jing Zhang
- College of Plant Protection, Jilin Agricultural University, Changchun, PR China
| | - Yong-Gang Zhu
- College of Plant Protection, Jilin Agricultural University, Changchun, PR China
| | - Bei-Jie Xie
- College of Plant Protection, Jilin Agricultural University, Changchun, PR China
| |
Collapse
|
12
|
Chen W, Li Y, Zhou Y, Ma Y, Li Z. Design, synthesis and SAR study of novel sulfonylurea derivatives containing arylpyrimidine moieties as potential anti-phytopathogenic fungal agents. CHINESE CHEM LETT 2019. [DOI: 10.1016/j.cclet.2019.04.072] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
|
13
|
Guerra RF, Melo GFD, Faria RR, de Sousa Neto LR, Franca EDF. Molecular modelling to understand AFM tip functionalisation and imazaquin-AHAS interactions in order to design a new nanobiosensor. MOLECULAR SIMULATION 2019. [DOI: 10.1080/08927022.2019.1634266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Renan Faria Guerra
- Laboratory of Crystallography and Computational Chemistry, Chemistry Institute, Federal University of Uberlândia – UFU, Santa Mônica, Brazil
| | | | - Roberto Ribeiro Faria
- Laboratory of Crystallography and Computational Chemistry, Chemistry Institute, Federal University of Uberlândia – UFU, Santa Mônica, Brazil
| | - Lourival Rodrigues de Sousa Neto
- Laboratory of Crystallography and Computational Chemistry, Chemistry Institute, Federal University of Uberlândia – UFU, Santa Mônica, Brazil
| | - Eduardo de Faria Franca
- Laboratory of Crystallography and Computational Chemistry, Chemistry Institute, Federal University of Uberlândia – UFU, Santa Mônica, Brazil
| |
Collapse
|
14
|
Wang B, Xu X, Gong S, Wang Q, Hu H, Xu D. Synthesis and Herbicidal Activity of O‐(2,6‐Bis(4,6‐dimethoxypyrimidin‐2‐yloxy) benzoyl)oxime 3‐Trifluoromethylacetophenone. ChemistrySelect 2019. [DOI: 10.1002/slct.201902806] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Bin Wang
- School of pharmaceutical and Life SciencesChangzhou University Changzhou 213164 P.R. China
| | - Xiangjian Xu
- School of pharmaceutical and Life SciencesChangzhou University Changzhou 213164 P.R. China
| | - Shunze Gong
- School of pharmaceutical and Life SciencesChangzhou University Changzhou 213164 P.R. China
| | - Qin Wang
- School of pharmaceutical and Life SciencesChangzhou University Changzhou 213164 P.R. China
| | - Hang Hu
- School of pharmaceutical and Life SciencesChangzhou University Changzhou 213164 P.R. China
| | - Defeng Xu
- School of pharmaceutical and Life SciencesChangzhou University Changzhou 213164 P.R. China
- National & Local Joint Engineering Research Center for High-efficiency Refining and High-quality Utilization of BiomassChangzhou University Changzhou 213164 P. R. China
| |
Collapse
|
15
|
Thiour-Mauprivez C, Martin-Laurent F, Calvayrac C, Barthelmebs L. Effects of herbicide on non-target microorganisms: Towards a new class of biomarkers? THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 684:314-325. [PMID: 31153078 DOI: 10.1016/j.scitotenv.2019.05.230] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 05/02/2019] [Accepted: 05/16/2019] [Indexed: 05/19/2023]
Abstract
Conventional agriculture still relies on the general use of agrochemicals (herbicides, fungicides and insecticides) to control various pests (weeds, fungal pathogens and insects), to ensure the yield of crop and to feed a constantly growing population. The generalized use of pesticides in agriculture leads to the contamination of soil and other connected environmental resources. The persistence of pesticide residues in soil is identified as a major threat for in-soil living organisms that are supporting an important number of ecosystem services. Although authorities released pesticides on the market only after their careful and thorough evaluation, the risk assessment for in-soil living organisms is unsatisfactory, particularly for microorganisms for which pesticide toxicity is solely considered by one global test measuring N mineralization. Recently, European Food Safety Authority (EFSA) underlined the lack of standardized methods to assess pesticide ecotoxicological effects on soil microorganisms. Within this context, there is an obvious need to develop innovative microbial markers sensitive to pesticide exposure. Biomarkers that reveal direct effects of pesticides on microorganisms are often viewed as the panacea. Such biomarkers can only be developed for pesticides having a mode of action inhibiting a specific enzyme not only found in the targeted organisms but also in microorganisms which are considered as "non-target organisms" by current regulations. This review explores possible ways of innovation to develop such biomarkers for herbicides. We scanned the herbicide classification by considering the mode of action, the targeted enzyme and the ecotoxicological effects of each class of active substance in order to identify those that can be tracked using sensitive microbial markers.
Collapse
Affiliation(s)
- Clémence Thiour-Mauprivez
- Univ. Perpignan Via Domitia, Biocapteurs-Analyses-Environnement, 66860 Perpignan, France; Laboratoire de Biodiversité et Biotechnologies Microbiennes, USR 3579 Sorbonne Universités (UPMC) Paris 6 et CNRS Observatoire Océanologique, 66650 Banyuls-sur-Mer, France; AgroSup Dijon, INRA, Univ. Bourgogne, Univ. Bourgogne Franche-Comté, F-21065 Dijon, France
| | - Fabrice Martin-Laurent
- AgroSup Dijon, INRA, Univ. Bourgogne, Univ. Bourgogne Franche-Comté, F-21065 Dijon, France
| | - Christophe Calvayrac
- Univ. Perpignan Via Domitia, Biocapteurs-Analyses-Environnement, 66860 Perpignan, France; Laboratoire de Biodiversité et Biotechnologies Microbiennes, USR 3579 Sorbonne Universités (UPMC) Paris 6 et CNRS Observatoire Océanologique, 66650 Banyuls-sur-Mer, France
| | - Lise Barthelmebs
- Univ. Perpignan Via Domitia, Biocapteurs-Analyses-Environnement, 66860 Perpignan, France; Laboratoire de Biodiversité et Biotechnologies Microbiennes, USR 3579 Sorbonne Universités (UPMC) Paris 6 et CNRS Observatoire Océanologique, 66650 Banyuls-sur-Mer, France.
| |
Collapse
|
16
|
Alvarado O, García-Meseguer R, Javier Ruiz-Pernía J, Tuñon I, Delgado EJ. A molecular dynamics study on the role of the protonation state in the biosynthesis of R-PAC by AHAS. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2018.12.039] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
17
|
Luo XW, Zhang DY, Zhu TH, Zhou XG, Peng J, Zhang SB, Liu Y. Adaptation mechanism and tolerance of Rhodopseudomonas palustris PSB-S under pyrazosulfuron-ethyl stress. BMC Microbiol 2018; 18:207. [PMID: 30526497 PMCID: PMC6286529 DOI: 10.1186/s12866-018-1361-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2018] [Accepted: 11/29/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Pyrazosulfuron-ethyl is a long lasting herbicide in the agro-ecosystem and its residue is toxic to crops and other non-target organisms. A better understanding of molecular basis in pyrazosulfuron-ethyl tolerant organisms will shed light on the adaptive mechanisms to this herbicide. RESULTS Pyrazosulfuron-ethyl inhibited biomass production in Rhodopseudomonas palustris PSB-S, altered cell morphology, suppressed flagella formation, and reduced pigment biosynthesis through significant suppression of carotenoids biosynthesis. A total of 1127 protein spots were detected in the two-dimensional gel electrophoresis. Among them, 72 spots representing 56 different proteins were found to be differently expressed using MALDI-TOF/TOF-MS, including 26 up- and 30 down-regulated proteins in the pyrazosulfuron-ethyl-treated PSB-S cells. The up-regulated proteins were involved predominantly in oxidative stress or energy generation pathways, while most of the down-regulated proteins were involved in the biomass biosynthesis pathway. The protein expression profiles suggested that the elongation factor G, cell division protein FtsZ, and proteins associated with the ABC transporters were crucial for R. palustris PSB-S tolerance against pyrazosulfuron-ethyl. CONCLUSION Up-regulated proteins, including elongation factor G, cell division FtsZ, ATP synthase, and superoxide dismutase, and down-regulated proteins, including ALS III and ABC transporters, as well as some unknown proteins might play roles in R. palustris PSB-S adaptation to pyrazosulfuron-ethyl induced stresses. Functional validations of these candidate proteins should help to develope transgenic crops resistant to pyrazosulfuron-ethyl.
Collapse
Affiliation(s)
- Xiang-Wen Luo
- Key laboratory of pest management of horticultural crop of Hunan province, Hunan Plant Protection Institute, Hunan Academy of Agricultural Science, No 726 Second Yuanda Road, Furong District, Changsha, 410125, Hunan province, People's Republic of China.,Plant Protection College, Hunan Agricultural University, Changsha, 410128, China
| | - De-Yang Zhang
- Key laboratory of pest management of horticultural crop of Hunan province, Hunan Plant Protection Institute, Hunan Academy of Agricultural Science, No 726 Second Yuanda Road, Furong District, Changsha, 410125, Hunan province, People's Republic of China.,Plant Protection College, Hunan Agricultural University, Changsha, 410128, China
| | - Teng-Hui Zhu
- Plant Protection College, Hunan Agricultural University, Changsha, 410128, China
| | - Xu-Guo Zhou
- Department of Entomology, University of Kentucky, Lexington, KY, 40546, USA
| | - Jing Peng
- Key laboratory of pest management of horticultural crop of Hunan province, Hunan Plant Protection Institute, Hunan Academy of Agricultural Science, No 726 Second Yuanda Road, Furong District, Changsha, 410125, Hunan province, People's Republic of China.,Plant Protection College, Hunan Agricultural University, Changsha, 410128, China
| | - Song-Bai Zhang
- Key laboratory of pest management of horticultural crop of Hunan province, Hunan Plant Protection Institute, Hunan Academy of Agricultural Science, No 726 Second Yuanda Road, Furong District, Changsha, 410125, Hunan province, People's Republic of China.
| | - Yong Liu
- Key laboratory of pest management of horticultural crop of Hunan province, Hunan Plant Protection Institute, Hunan Academy of Agricultural Science, No 726 Second Yuanda Road, Furong District, Changsha, 410125, Hunan province, People's Republic of China. .,Plant Protection College, Hunan Agricultural University, Changsha, 410128, China.
| |
Collapse
|
18
|
Xie Y, Wen X, Zhao D, Niu C, Zhao Y, Qi H, Xi Z. Interactions between the ACT Domains and Catalytic Subunits of Acetohydroxyacid Synthases (AHASs) from Different Species. Chembiochem 2018; 19:2387-2394. [DOI: 10.1002/cbic.201800367] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 09/16/2018] [Indexed: 01/05/2023]
Affiliation(s)
- Yonghui Xie
- State Key Laboratory of Elemento-Organic Chemistry; Department of Chemical Biology; National Pesticide Engineering Research Center (Tianjin); Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); College of Chemistry; Nankai University; Tianjin 300071 P.R. China
| | - Xin Wen
- State Key Laboratory of Elemento-Organic Chemistry; Department of Chemical Biology; National Pesticide Engineering Research Center (Tianjin); Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); College of Chemistry; Nankai University; Tianjin 300071 P.R. China
| | - Dongmei Zhao
- State Key Laboratory of Elemento-Organic Chemistry; Department of Chemical Biology; National Pesticide Engineering Research Center (Tianjin); Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); College of Chemistry; Nankai University; Tianjin 300071 P.R. China
| | - Congwei Niu
- State Key Laboratory of Elemento-Organic Chemistry; Department of Chemical Biology; National Pesticide Engineering Research Center (Tianjin); Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); College of Chemistry; Nankai University; Tianjin 300071 P.R. China
| | - Yuefang Zhao
- State Key Laboratory of Elemento-Organic Chemistry; Department of Chemical Biology; National Pesticide Engineering Research Center (Tianjin); Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); College of Chemistry; Nankai University; Tianjin 300071 P.R. China
| | - Haoman Qi
- State Key Laboratory of Elemento-Organic Chemistry; Department of Chemical Biology; National Pesticide Engineering Research Center (Tianjin); Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); College of Chemistry; Nankai University; Tianjin 300071 P.R. China
| | - Zhen Xi
- State Key Laboratory of Elemento-Organic Chemistry; Department of Chemical Biology; National Pesticide Engineering Research Center (Tianjin); Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); College of Chemistry; Nankai University; Tianjin 300071 P.R. China
| |
Collapse
|
19
|
Commercial AHAS-inhibiting herbicides are promising drug leads for the treatment of human fungal pathogenic infections. Proc Natl Acad Sci U S A 2018; 115:E9649-E9658. [PMID: 30249642 DOI: 10.1073/pnas.1809422115] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The increased prevalence of drug-resistant human pathogenic fungal diseases poses a major threat to global human health. Thus, new drugs are urgently required to combat these infections. Here, we demonstrate that acetohydroxyacid synthase (AHAS), the first enzyme in the branched-chain amino acid biosynthesis pathway, is a promising new target for antifungal drug discovery. First, we show that several AHAS inhibitors developed as commercial herbicides are powerful accumulative inhibitors of Candida albicans AHAS (K i values as low as 800 pM) and have determined high-resolution crystal structures of this enzyme in complex with several of these herbicides. In addition, we have demonstrated that chlorimuron ethyl (CE), a member of the sulfonylurea herbicide family, has potent antifungal activity against five different Candida species and Cryptococcus neoformans (with minimum inhibitory concentration, 50% values as low as 7 nM). Furthermore, in these assays, we have shown CE and itraconazole (a P450 inhibitor) can act synergistically to further improve potency. Finally, we show in Candida albicans-infected mice that CE is highly effective in clearing pathogenic fungal burden in the lungs, liver, and spleen, thus reducing overall mortality rates. Therefore, in view of their low toxicity to human cells, AHAS inhibitors represent a new class of antifungal drug candidates.
Collapse
|
20
|
Lv J, Huang Q, Sun Y, Qu G, Guo Y, Zhang X, Zhao H, Hu S. Male Sterility of an AHAS-Mutant Induced by Tribenuron-Methyl Solution Correlated With the Decrease of AHAS Activity in Brassica napus L. FRONTIERS IN PLANT SCIENCE 2018; 9:1014. [PMID: 30061911 PMCID: PMC6055054 DOI: 10.3389/fpls.2018.01014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 06/21/2018] [Indexed: 05/31/2023]
Abstract
Tribenuron-methyl (TBM), an acetohydroxyacid synthase (AHAS)-inhibiting herbicide, can be used as an efficient chemical hybridization agent to induce male sterility for practical utilization of heterosis in rapeseed (Brassica napus L.). Utilization of rapeseed mutants harboring herbicide-resistant AHAS alleles as the male parent can simplify the hybrid seed production protocol. Here we characterized a novel TBM-resistant mutant K5 derived from an elite rapeseed variety, Zhongshuang No. 9 (ZS9), by ethyl methyl sulfonate mutagenesis. Comparative analysis of three BnAHAS genes (BnAHAS1, BnAHAS2, and BnAHAS3) between the mutant K5 and ZS9 identified a C-to-T transition at 544 from the translation start site in BnAHAS1 in K5 (This resistant allele is referred to as BnAHAS1544T ), which resulted in a substitution of proline with serine at 182 in BnAHAS1. Both ZS9 and K5 plants could be induced complete male sterility under TBM treatment (with 0.10 and 20 mg⋅L-1 of TBM, respectively). The relationship between TBM-induced male sterility (Y) and the relative AHAS activity of inflorescences (X) could be described as a modified logistic function, Y = 100-A/(1+Be(-KX)) for the both genotypes, although the obtained constants A, B, and K were different in the functions of ZS9 and K5. Transgenic Arabidopsis plants expressing BnAHAS1544T exhibited a higher TBM resistance of male reproductive organ than wild type, which confirmed that the Pro-182-Ser substitution in BnAHAS1 was responsible for higher TBM-resistance of male reproductive organs. Taken together, our findings provide a novel valuable rapeseed mutant for hybrid breeding by chemical hybridization agents and support the hypothesis that AHAS should be the target of the AHAS-inhibiting herbicide TBM when it is used as chemical hybridization agent in rapeseed.
Collapse
Affiliation(s)
- Jinyang Lv
- State Key Laboratory of Crop Stress Biology in Arid Areas, Yangling, China
- College of Life Sciences, Northwest A&F University, Yangling, China
| | - Qianxin Huang
- State Key Laboratory of Crop Stress Biology in Arid Areas, Yangling, China
- College of Agronomy, Northwest A&F University, Yangling, China
| | - Yanyan Sun
- State Key Laboratory of Crop Stress Biology in Arid Areas, Yangling, China
- College of Agronomy, Northwest A&F University, Yangling, China
| | - Gaoping Qu
- State Key Laboratory of Crop Stress Biology in Arid Areas, Yangling, China
- College of Agronomy, Northwest A&F University, Yangling, China
| | - Yuan Guo
- State Key Laboratory of Crop Stress Biology in Arid Areas, Yangling, China
- College of Agronomy, Northwest A&F University, Yangling, China
| | - Xiaojuan Zhang
- State Key Laboratory of Crop Stress Biology in Arid Areas, Yangling, China
- College of Life Sciences, Northwest A&F University, Yangling, China
| | - Huixian Zhao
- State Key Laboratory of Crop Stress Biology in Arid Areas, Yangling, China
- College of Life Sciences, Northwest A&F University, Yangling, China
| | - Shengwu Hu
- State Key Laboratory of Crop Stress Biology in Arid Areas, Yangling, China
- College of Agronomy, Northwest A&F University, Yangling, China
| |
Collapse
|
21
|
Zhou S, Hua X, Wei W, Chen M, Gu Y, Zhou S, Song H, Li Z. Research on controllable alkaline soil degradation of 5-substituted chlorsulfuron. CHINESE CHEM LETT 2018. [DOI: 10.1016/j.cclet.2017.09.046] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
22
|
Wagner JM, Williams EV, Alper HS. Developing a piggyBac Transposon System and Compatible Selection Markers for Insertional Mutagenesis and Genome Engineering in Yarrowia lipolytica. Biotechnol J 2018; 13:e1800022. [PMID: 29493878 DOI: 10.1002/biot.201800022] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2018] [Revised: 02/17/2018] [Indexed: 12/30/2022]
Abstract
Yarrowia lipolytica is a non-conventional yeast of interest to the biotechnology industry. However, the physiology, metabolism, and genetic regulation of Y. lipolytica diverge significantly from more well-studied and characterized yeasts such as Saccharomyces cerevisiae. To develop additional genetic tools for this industrially relevant host, the piggyBac transposon system to enable efficient generation of genome-wide insertional mutagenesis libraries and introduction of scarless, footprint-free genomic modifications in Y. lipolytica. Specifically, we demonstrate piggyBac transposition in Y. lipolytica, and then use the approach to screen transposon insertion libraries for rapid isolation of mutations that confer altered canavanine resistance, pigment formation, and neutral lipid accumulation. We also develop a variety of piggyBac compatible selection markers for footprint-free genome engineering, including a novel dominant marker cassette (Escherichia coli guaB) for effective Y. lipolytica selection using mycophenolic acid. We utilize these marker cassettes to construct a piggyBac vector set that allows for auxotrophic selection (uracil or tryptophan biosynthesis) or dominant selection (hygromycin, nourseothricin, chlorimuron ethyl, or mycophenolic acid resistance) and subsequent marker excision. These new genetic tools and techniques will help to facilitate and accelerate the engineering of Y. lipolytica strains for efficient and sustainable production of a wide variety of small molecules and proteins.
Collapse
Affiliation(s)
- James M Wagner
- McKetta Department of Chemical Engineering, The University of Texas at Austin, 200 E Dean Keeton St. Stop C0400, Austin, TX 78712, USA
| | - Eden V Williams
- McKetta Department of Chemical Engineering, The University of Texas at Austin, 200 E Dean Keeton St. Stop C0400, Austin, TX 78712, USA
| | - Hal S Alper
- McKetta Department of Chemical Engineering, The University of Texas at Austin, 200 E Dean Keeton St. Stop C0400, Austin, TX 78712, USA
- Institute for Cellular and Molecular Biology, The University of Texas at Austin, 2500 Speedway Avenue, Austin, TX 78712, USA
| |
Collapse
|
23
|
Structural insights into the mechanism of inhibition of AHAS by herbicides. Proc Natl Acad Sci U S A 2018; 115:E1945-E1954. [PMID: 29440497 DOI: 10.1073/pnas.1714392115] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Acetohydroxyacid synthase (AHAS), the first enzyme in the branched amino acid biosynthesis pathway, is present only in plants and microorganisms, and it is the target of >50 commercial herbicides. Penoxsulam (PS), which is a highly effective broad-spectrum AHAS-inhibiting herbicide, is used extensively to control weed growth in rice crops. However, the molecular basis for its inhibition of AHAS is poorly understood. This is despite the availability of structural data for all other classes of AHAS-inhibiting herbicides. Here, crystallographic data for Saccharomyces cerevisiae AHAS (2.3 Å) and Arabidopsis thaliana AHAS (2.5 Å) in complex with PS reveal the extraordinary molecular mechanisms that underpin its inhibitory activity. The structures show that inhibition of AHAS by PS triggers expulsion of two molecules of oxygen bound in the active site, releasing them as substrates for an oxygenase side reaction of the enzyme. The structures also show that PS either stabilizes the thiamin diphosphate (ThDP)-peracetate adduct, a product of this oxygenase reaction, or traps within the active site an intact molecule of peracetate in the presence of a degraded form of ThDP: thiamine aminoethenethiol diphosphate. Kinetic analysis shows that PS inhibits AHAS by a combination of events involving FAD oxidation and chemical alteration of ThDP. With the emergence of increasing levels of resistance toward front-line herbicides and the need to optimize the use of arable land, these data suggest strategies for next generation herbicide design.
Collapse
|
24
|
Qu RY, Yang JF, Devendar P, Kang WM, Liu YC, Chen Q, Niu CW, Xi Z, Yang GF. Discovery of New 2-[(4,6-Dimethoxy-1,3,5-triazin-2-yl)oxy]-6-(substituted phenoxy)benzoic Acids as Flexible Inhibitors of Arabidopsis thaliana Acetohydroxyacid Synthase and Its P197L Mutant. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:11170-11178. [PMID: 29186952 DOI: 10.1021/acs.jafc.7b05198] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In the search for new antiresistance acetohydroxyacid synthase (AHAS, EC 2.2.1.6) inhibitors to combat weed resistance associated with AHAS mutations, a series of 2-[(4,6-dimethoxy-1,3,5-triazin-2-yl)oxy]-6-(substituted phenoxy)benzoic acids 11-38 were designed and synthesized via the strategy of conformational flexibility analysis. Compounds 21, 22, 26, 33, 36, and 38 with high potency against both wild-type AtAHAS and its P197L mutant were identified as promising candidates with low resistance factors (RF, defined as the ratio between the ki values toward P197L mutant and wild-type AHAS) ranging from 0.73 to 6.32. Especially, compound 22 (RF = 0.73) was further identified as the most potent antiresistance AHAS inhibitor because of its significantly reduced resistance level compared with that of tribenuron-methyl (RF = 2650) and bispyribac (RF = 4.57). Furthermore, compounds 26, 33, 36, and 38 also displayed promising herbicidal activities against sensitive and resistant (P197L) Descurainia sophia at the dosage of 75-150 g of active ingredient (ai)/ha. Notably, compounds 33 and 38 still maintained over 60% herbicidal activity toward the resistant weed even at much lower dosages (37.5 g ai/ha). Therefore, the designed scaffold has the great potential to discover new candidate compounds for the control of weed resistance associated with AHAS mutation.
Collapse
Affiliation(s)
- Ren-Yu Qu
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University (CCNU) , Wuhan 430079, PR China
| | - Jing-Fang Yang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University (CCNU) , Wuhan 430079, PR China
| | - Ponnam Devendar
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University (CCNU) , Wuhan 430079, PR China
| | - Wei-Ming Kang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University (CCNU) , Wuhan 430079, PR China
| | - Yu-Chao Liu
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University (CCNU) , Wuhan 430079, PR China
| | - Qiong Chen
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University (CCNU) , Wuhan 430079, PR China
| | - Cong-Wei Niu
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University (NKU) , Tianjin 300071, PR China
| | - Zhen Xi
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University (NKU) , Tianjin 300071, PR China
- Collaborative Innovation Center of Chemical Science and Engineering , Tianjin 30071, PR China
| | - Guang-Fu Yang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University (CCNU) , Wuhan 430079, PR China
- Collaborative Innovation Center of Chemical Science and Engineering , Tianjin 30071, PR China
| |
Collapse
|
25
|
Amorim Franco TM, Blanchard JS. Bacterial Branched-Chain Amino Acid Biosynthesis: Structures, Mechanisms, and Drugability. Biochemistry 2017; 56:5849-5865. [PMID: 28977745 DOI: 10.1021/acs.biochem.7b00849] [Citation(s) in RCA: 94] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The eight enzymes responsible for the biosynthesis of the three branched-chain amino acids (l-isoleucine, l-leucine, and l-valine) were identified decades ago using classical genetic approaches based on amino acid auxotrophy. This review will highlight the recent progress in the determination of the three-dimensional structures of these enzymes, their chemical mechanisms, and insights into their suitability as targets for the development of antibacterial agents. Given the enormous rise in bacterial drug resistance to every major class of antibacterial compound, there is a clear and present need for the identification of new antibacterial compounds with nonoverlapping targets to currently used antibacterials that target cell wall, protein, mRNA, and DNA synthesis.
Collapse
Affiliation(s)
- Tathyana M Amorim Franco
- Department of Biochemistry, Albert Einstein College of Medicine , 1300 Morris Park Avenue, Bronx, New York 10805, United States
| | - John S Blanchard
- Department of Biochemistry, Albert Einstein College of Medicine , 1300 Morris Park Avenue, Bronx, New York 10805, United States
| |
Collapse
|
26
|
Zhou S, Hua XW, Wei W, Gu YC, Liu XQ, Chen JH, Chen MG, Xie YT, Zhou S, Meng XD, Zhang Y, Li YH, Wang BL, Song HB, Li ZM. Research on Controllable Degradation of Novel Sulfonylurea Herbicides in Acidic and Alkaline Soils. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:7661-7668. [PMID: 28813155 DOI: 10.1021/acs.jafc.7b03029] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The degradation issue of sulfonylurea (SU) has become one of the biggest challenges that hamper the development and application of this class of herbicides, especially in the alkaline soils of northern China. On the basis of the previous discovery that some substituents on the fifth position of the benzene ring in Chlorsulfuron could hasten its degradation rate, apparently in acidic soil, this work on Metsulfuron-methyl showed more convincing results. Two novel compounds (I-1 and I-2) were designed and synthesized, and they still retained potent herbicidal activity in tests against both dicotyledons and monocotyledons. The half-lives of degradation (DT50) assay revealed that I-1 showed an accelerated degradation rate in acidic soil (pH 5.59). Moreover, we delighted to find that the degradation rate of I-1 was 9-10-fold faster than that of Metsulfuron-methyl and Chlorsulfuron when in alkaline soil (pH 8.46), which has more practical value. This research suggests that a modified structure that has potent herbicidal activity as well as accelerated degradation rate could be realized and this approach may provide a way to improve the residue problem of SUs in farmlands with alkaline soil.
Collapse
Affiliation(s)
- Shaa Zhou
- State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), College of Chemistry, Nankai University , Tianjin 300071, China
| | - Xue-Wen Hua
- College of Agriculture, Liaocheng University , Liaocheng 252000, China
| | - Wei Wei
- State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), College of Chemistry, Nankai University , Tianjin 300071, China
| | - Yu-Cheng Gu
- Jealott's Hill International Research Centre, Syngenta , Bracknell, Berkshire, RG42 6EY, U.K
| | - Xiao-Qing Liu
- State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), College of Chemistry, Nankai University , Tianjin 300071, China
| | - Jing-Huo Chen
- State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), College of Chemistry, Nankai University , Tianjin 300071, China
| | - Ming-Gui Chen
- State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), College of Chemistry, Nankai University , Tianjin 300071, China
| | - Yong-Tao Xie
- State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), College of Chemistry, Nankai University , Tianjin 300071, China
| | - Sha Zhou
- State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), College of Chemistry, Nankai University , Tianjin 300071, China
| | - Xiang-De Meng
- State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), College of Chemistry, Nankai University , Tianjin 300071, China
| | - Yan Zhang
- State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), College of Chemistry, Nankai University , Tianjin 300071, China
| | - Yong-Hong Li
- State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), College of Chemistry, Nankai University , Tianjin 300071, China
| | - Bao-Lei Wang
- State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), College of Chemistry, Nankai University , Tianjin 300071, China
| | - Hai-Bin Song
- State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), College of Chemistry, Nankai University , Tianjin 300071, China
| | - Zheng-Ming Li
- State Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), College of Chemistry, Nankai University , Tianjin 300071, China
| |
Collapse
|
27
|
Song D, Wu G, Vrinten P, Qiu X. Development of imidazolinone herbicide tolerant borage (Borago officinalis L.). PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2017; 262:74-80. [PMID: 28716422 DOI: 10.1016/j.plantsci.2017.05.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2016] [Revised: 05/19/2017] [Accepted: 05/25/2017] [Indexed: 06/07/2023]
Abstract
Borage (Borago officinalis) is an annual herb that produces a high level of gamma-linolenic acid (GLA) in its seed oil. Due to the recognized health benefits of GLA, borage is now commercially cultivated worldwide. However, an herbicide-tolerant variety for effective weed management has not yet been developed. Here we report the generation and characterization of ethyl methanesulfonate (EMS) induced borage mutant lines tolerant to the herbicide imidazolinone. An EMS-mutagenized borage population was generated by using a series of concentrations of EMS to treat mature borage seeds. Screening of the M2 and M3 borage plants using an herbicide treatment resulted in the identification of two imidazolinone-tolerant lines. Sequence analysis of two acetohydroxyacid synthase (AHAS) genes, AHAS1 and AHAS2, from the mutant (tolerant) and wild type (susceptible) borage plants showed that single nucleotide substitutions which resulted in amino acid changes occurred in AHAS1 and AHAS2, respectively in the two tolerant lines. A KASP marker was then developed to differentiate the homozygous susceptible, homozygous tolerant and heterozygous borage plants. An in vitro assay showed that homozygous tolerant borage carrying the AHAS1 mutation retained significantly higher AHAS activity than susceptible borage across different imazamox concentrations. A herbicide dose response test indicated that the line with the AHAS1 mutation could tolerate four times the normally used field concentration of "Solo" herbicide.
Collapse
Affiliation(s)
- Dongyan Song
- Department of Food & Bioproduct Sciences, University of Saskatchewan, Saskatoon, SK, Canada
| | - Guohai Wu
- Bioriginal Food & Science Corporation, Saskatoon, SK, Canada
| | | | - Xiao Qiu
- Department of Food & Bioproduct Sciences, University of Saskatchewan, Saskatoon, SK, Canada.
| |
Collapse
|
28
|
Wei W, Zhou S, Cheng D, Li Y, Liu J, Xie Y, Li Y, Li Z. Design, synthesis and herbicidal activity study of aryl 2,6-disubstituted sulfonylureas as potent acetohydroxyacid synthase inhibitors. Bioorg Med Chem Lett 2017; 27:3365-3369. [DOI: 10.1016/j.bmcl.2017.06.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2017] [Revised: 05/14/2017] [Accepted: 06/02/2017] [Indexed: 10/19/2022]
|
29
|
Garcia MD, Wang JG, Lonhienne T, Guddat LW. Crystal structure of plant acetohydroxyacid synthase, the target for several commercial herbicides. FEBS J 2017; 284:2037-2051. [PMID: 28485824 DOI: 10.1111/febs.14102] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Revised: 03/21/2017] [Accepted: 05/04/2017] [Indexed: 11/26/2022]
Abstract
Acetohydroxyacid synthase (AHAS, EC 2.2.1.6) is the first enzyme in the branched-chain amino acid biosynthesis pathway. Five of the most widely used commercial herbicides (i.e. sulfonylureas, imidazolinones, triazolopyrimidines, pyrimidinyl-benzoates and sulfonylamino-cabonyl-triazolinones) target this enzyme. Here we have determined the first crystal structure of a plant AHAS in the absence of any inhibitor (2.9 Å resolution) and it shows that the herbicide-binding site adopts a folded state even in the absence of an inhibitor. This is unexpected because the equivalent regions for herbicide binding in uninhibited Saccharomyces cerevisiae AHAS crystal structures are either disordered, or adopt a different fold when the herbicide is not present. In addition, the structure provides an explanation as to why some herbicides are more potent inhibitors of Arabidopsis thaliana AHAS compared to AHASs from other species (e.g. S. cerevisiae). The elucidation of the native structure of plant AHAS provides a new platform for future rational structure-based herbicide design efforts. DATABASE The coordinates and structure factors for uninhibited AtAHAS have been deposited in the Protein Data Bank (www.pdb.org) with the PDB ID code 5K6Q.
Collapse
Affiliation(s)
- Mario Daniel Garcia
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Australia
| | - Jian-Guo Wang
- State-Key Laboratory and Institute of Elemento-Organic Chemistry, National Pesticide Engineering Research Center and College of Chemistry, Nankai University, Tianjin, China
| | - Thierry Lonhienne
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Australia
| | - Luke William Guddat
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Australia
| |
Collapse
|
30
|
Marlatt VL, Martyniuk CJ. Biological responses to phenylurea herbicides in fish and amphibians: New directions for characterizing mechanisms of toxicity. Comp Biochem Physiol C Toxicol Pharmacol 2017; 194:9-21. [PMID: 28109972 DOI: 10.1016/j.cbpc.2017.01.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Revised: 01/11/2017] [Accepted: 01/13/2017] [Indexed: 12/19/2022]
Abstract
Urea-based herbicides are applied in agriculture to control broadleaf and grassy weeds, acting to either inhibit photosynthesis at photosystem II (phenylureas) or to inhibit acetolactate synthase acetohydroxyacid synthase (sulfonylureas). While there are different chemical formulas for urea-based herbicides, the phenylureas are a widely used class in North America and have been detected in aquatic environments due to agricultural run-off. Here, we summarize the current state of the literature, synthesizing data on phenylureas and their biological effects in two non-target animals, fish and amphibians, with a primary focus on diuron and linuron. In fish, although the acutely lethal effects of diuron in early life stages appear to be >1mg/L, recent studies measuring sub-lethal behavioural and developmental endpoints suggest that diuron causes adverse effects at lower concentrations (i.e. <0.1mg/L). Considerably less toxicity data exist for amphibians, and this is a knowledge gap in the literature. In terms of sub-lethal effects and mode of action (MOA), linuron is well documented to have anti-androgenic effects in vertebrates, including fish. However, there are other MOAs that are not adequately assessed in toxicology studies. In order to identify additional potential MOAs, we conducted in silico analyses for linuron and diuron that were based upon transcriptome studies and chemical structure-function relationships (i.e. ToxCast™, Prediction of Activity Spectra of Substances). Based upon these analyses, we suggest that steroid biosynthesis, cholesterol metabolism and pregnane X receptor activation are common targets, and offer some new endpoints for future investigations of phenylurea herbicides in non-target animals.
Collapse
Affiliation(s)
- Vicki L Marlatt
- Department of Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia, Canada.
| | - Christopher J Martyniuk
- Department of Physiological Sciences and Center for Environmental and Human Toxicology, UF Genetics Institute, College of Veterinary Medicine, University of Florida, Gainesville, FL 326111, USA; Canadian Rivers Institute, Canada
| |
Collapse
|
31
|
Comprehensive understanding of acetohydroxyacid synthase inhibition by different herbicide families. Proc Natl Acad Sci U S A 2017; 114:E1091-E1100. [PMID: 28137884 PMCID: PMC5321015 DOI: 10.1073/pnas.1616142114] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Five commercial herbicide families inhibit acetohydroxyacid synthase (AHAS, E.C. 2.2.1.6), which is the first enzyme in the branched-chain amino acid biosynthesis pathway. The popularity of these herbicides is due to their low application rates, high crop vs. weed selectivity, and low toxicity in animals. Here, we have determined the crystal structures of Arabidopsis thaliana AHAS in complex with two members of the pyrimidinyl-benzoate (PYB) and two members of the sulfonylamino-carbonyl-triazolinone (SCT) herbicide families, revealing the structural basis for their inhibitory activity. Bispyribac, a member of the PYBs, possesses three aromatic rings and these adopt a twisted "S"-shaped conformation when bound to A. thaliana AHAS (AtAHAS) with the pyrimidinyl group inserted deepest into the herbicide binding site. The SCTs bind such that the triazolinone ring is inserted deepest into the herbicide binding site. Both compound classes fill the channel that leads to the active site, thus preventing substrate binding. The crystal structures and mass spectrometry also show that when these herbicides bind, thiamine diphosphate (ThDP) is modified. When the PYBs bind, the thiazolium ring is cleaved, but when the SCTs bind, ThDP is modified to thiamine 2-thiazolone diphosphate. Kinetic studies show that these compounds not only trigger reversible accumulative inhibition of AHAS, but also can induce inhibition linked with ThDP degradation. Here, we describe the features that contribute to the extraordinarily powerful herbicidal activity exhibited by four classes of AHAS inhibitors.
Collapse
|
32
|
Liu Y, Li Y, Wang X. Acetohydroxyacid synthases: evolution, structure, and function. Appl Microbiol Biotechnol 2016; 100:8633-49. [DOI: 10.1007/s00253-016-7809-9] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Revised: 07/28/2016] [Accepted: 08/12/2016] [Indexed: 10/21/2022]
|
33
|
Wei W, Cheng D, Liu J, Li Y, Ma Y, Li Y, Yu S, Zhang X, Li Z. Design, synthesis and SAR study of novel sulfonylureas containing an alkenyl moiety. Org Biomol Chem 2016; 14:8356-66. [PMID: 27533925 DOI: 10.1039/c6ob01555g] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of sulfonylurea compounds was designed and synthesized via introducing an alkenyl moiety into the aryl-5 position and most title compounds exhibited enhanced antifungal activities and limited herbicidal activities compared with chlorsulfuron. Then, a CoMSIA calculation for antifungal activities was carried out to establish a 3D-QSAR model in which a cross-validated q(2) of 0.585 and a correlation coefficient r(2) of 0.989 were obtained. The derived model revealed that hydrophobic and electrostatic fields were the two most important factors for antifungal activity. Structure optimization was performed according to the CoMSIA model and compound 9z was found to be as potent as chlorothalonil in vitro against C. cornigerum, the pathogen of the wheat sharp eyespot disease. In order to study the fungicidal mechanism, 9z was successfully docked into yeast AHAS using a flexible molecular docking method and the resulting binding pattern was similar to that of chlorimuron-ethyl, indicating that the antifungal activity of compounds 9 was probably due to the inhibition of fungal AHAS.
Collapse
Affiliation(s)
- Wei Wei
- State Key Laboratory of Elemento-Organic Chemistry, Institute of Elemento-Organic, Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, (Tianjin), Nankai University, Tianjin 300071, China.
| | | | | | | | | | | | | | | | | |
Collapse
|
34
|
Liu YC, Qu RY, Chen Q, Yang JF, Cong-Wei N, Zhen X, Yang GF. Triazolopyrimidines as a New Herbicidal Lead for Combating Weed Resistance Associated with Acetohydroxyacid Synthase Mutation. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2016; 64:4845-4857. [PMID: 27265721 DOI: 10.1021/acs.jafc.6b00720] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Acetohydroxyacid synthase (AHAS; also known as acetolactate synthase; EC 2.2.1.6, formerly EC 4.1.3.18) is the first common enzyme in the biosynthetic pathway leading to the branched-chain amino acids in plants and a wide range of microorganisms. Weed resistance to AHAS-inhibiting herbicides, increasing at an exponential rate, is becoming a global problem and leading to an urgent demand of developing novel compounds against both resistant and wild AHAS. In the present work, a series of novel 2-aroxyl-1,2,4-triazolopyrimidine derivatives (a total of 55) were designed and synthesized with the aim to discover an antiresistant lead compound. Fortunately, the screening results indicated that many of the newly synthesized compounds showed a better, even excellent, inhibition effect against both the wild-type Arabidopsis thaliana AHAS and P197L mutants. Among them, compounds 5-3 to 5-17, compounds 5-19 to 5-26, compounds 5-28 to 5-45, and compound 5-48 have the lower values of resistance factor (RF) and display a potential power to overcome resistance associated with the P197L mutation in the enzyme levels. Further greenhouse in vivo assay showed that compounds 5-15 and 5-20 displayed "moderate" to "good" herbicidal activity against both the wild type-and the resistant (P197L mutation) Descurainia sophia, even at a rate as low as 0.9375 (g of ai/ha). The above results indicated that these two compounds could be used as new leads for the future development of antiresistance herbicides.
Collapse
Affiliation(s)
- Yu-Chao Liu
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University , Wuhan 430079, PR China
| | - Ren-Yu Qu
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University , Wuhan 430079, PR China
| | - Qiong Chen
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University , Wuhan 430079, PR China
| | - Jing-Fang Yang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University , Wuhan 430079, PR China
| | - Niu Cong-Wei
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University , Tianjin 300071, PR China
| | - Xi Zhen
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University , Tianjin 300071, PR China
- Collaborative Innovation Center of Chemical Science and Engineering , Tianjing 30071, PR China
| | - Guang-Fu Yang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University , Wuhan 430079, PR China
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University , Tianjin 300071, PR China
- Collaborative Innovation Center of Chemical Science and Engineering , Tianjing 30071, PR China
| |
Collapse
|
35
|
Lonhienne T, Nouwens A, Williams CM, Fraser JA, Lee Y, West NP, Guddat LW. Commercial Herbicides Can Trigger the Oxidative Inactivation of Acetohydroxyacid Synthase. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201511985] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Thierry Lonhienne
- School of Chemistry and Molecular Biosciences The University of Queensland Brisbane 4072 QLD Australia
| | - Amanda Nouwens
- School of Chemistry and Molecular Biosciences The University of Queensland Brisbane 4072 QLD Australia
| | - Craig M. Williams
- School of Chemistry and Molecular Biosciences The University of Queensland Brisbane 4072 QLD Australia
| | - James A. Fraser
- School of Chemistry and Molecular Biosciences The University of Queensland Brisbane 4072 QLD Australia
| | - Yu‐Ting Lee
- School of Chemistry and Molecular Biosciences The University of Queensland Brisbane 4072 QLD Australia
| | - Nicholas P. West
- School of Chemistry and Molecular Biosciences The University of Queensland Brisbane 4072 QLD Australia
| | - Luke W. Guddat
- School of Chemistry and Molecular Biosciences The University of Queensland Brisbane 4072 QLD Australia
| |
Collapse
|
36
|
Lonhienne T, Nouwens A, Williams CM, Fraser JA, Lee Y, West NP, Guddat LW. Commercial Herbicides Can Trigger the Oxidative Inactivation of Acetohydroxyacid Synthase. Angew Chem Int Ed Engl 2016; 55:4247-51. [DOI: 10.1002/anie.201511985] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Revised: 01/22/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Thierry Lonhienne
- School of Chemistry and Molecular Biosciences The University of Queensland Brisbane 4072 QLD Australia
| | - Amanda Nouwens
- School of Chemistry and Molecular Biosciences The University of Queensland Brisbane 4072 QLD Australia
| | - Craig M. Williams
- School of Chemistry and Molecular Biosciences The University of Queensland Brisbane 4072 QLD Australia
| | - James A. Fraser
- School of Chemistry and Molecular Biosciences The University of Queensland Brisbane 4072 QLD Australia
| | - Yu‐Ting Lee
- School of Chemistry and Molecular Biosciences The University of Queensland Brisbane 4072 QLD Australia
| | - Nicholas P. West
- School of Chemistry and Molecular Biosciences The University of Queensland Brisbane 4072 QLD Australia
| | - Luke W. Guddat
- School of Chemistry and Molecular Biosciences The University of Queensland Brisbane 4072 QLD Australia
| |
Collapse
|
37
|
Lv Y, Kandale A, Wun SJ, McGeary RP, Williams SJ, Kobe B, Sieber V, Schembri MA, Schenk G, Guddat LW. Crystal structure of
Mycobacterium tuberculosis
ketol‐acid reductoisomerase at 1.0 Å resolution – a potential target for anti‐tuberculosis drug discovery. FEBS J 2016; 283:1184-96. [DOI: 10.1111/febs.13672] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2015] [Revised: 01/18/2016] [Accepted: 01/27/2016] [Indexed: 10/22/2022]
Affiliation(s)
- You Lv
- School of Chemistry and Molecular Biosciences and Australian Infectious Disease Research Centre University of Queensland Brisbane Australia
| | - Ajit Kandale
- School of Chemistry and Molecular Biosciences and Australian Infectious Disease Research Centre University of Queensland Brisbane Australia
| | - Shun Jie Wun
- School of Chemistry and Molecular Biosciences and Australian Infectious Disease Research Centre University of Queensland Brisbane Australia
| | - Ross P. McGeary
- School of Chemistry and Molecular Biosciences and Australian Infectious Disease Research Centre University of Queensland Brisbane Australia
| | - Simon J. Williams
- School of Chemistry and Molecular Biosciences and Australian Infectious Disease Research Centre University of Queensland Brisbane Australia
| | - Bostjan Kobe
- School of Chemistry and Molecular Biosciences and Australian Infectious Disease Research Centre University of Queensland Brisbane Australia
- Institute for Molecular Bioscience University of Queensland Brisbane Australia
| | - Volker Sieber
- Straubing Center of Science Technische Universität München Straubing Germany
| | - Mark A. Schembri
- School of Chemistry and Molecular Biosciences and Australian Infectious Disease Research Centre University of Queensland Brisbane Australia
| | - Gerhard Schenk
- School of Chemistry and Molecular Biosciences and Australian Infectious Disease Research Centre University of Queensland Brisbane Australia
| | - Luke W. Guddat
- School of Chemistry and Molecular Biosciences and Australian Infectious Disease Research Centre University of Queensland Brisbane Australia
| |
Collapse
|
38
|
Lu HP, Edwards M, Wang QZ, Zhao HJ, Fu HW, Huang JZ, Gatehouse A, Shu QY. Expression of cytochrome P450 CYP81A6 in rice: tissue specificity, protein subcellular localization, and response to herbicide application. J Zhejiang Univ Sci B 2015; 16:113-22. [PMID: 25644466 DOI: 10.1631/jzus.b1400168] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The cytochrome P450 gene CYP81A6 confers tolerance to bentazon and metsulfuron-methyl, two selective herbicides widely used for weed control in rice and wheat fields. Knockout mutants of CYP81A6 are highly susceptible to both herbicides. The present study aimed to characterize the CYP81A6 expression in rice. Quantitative real-time polymerase chain reaction (PCR) analyses demonstrated that foliar treatment of bentazon (500 mg/L) greatly induced expression of CYP81A6 in both wild-type (Jiazhe B) and its knockout mutant (Jiazhe mB): a 10-fold increase at 9 h before returning to basal levels at 24 h in Jiazhe B, while in the mutant the expression level rose to >20-fold at 12 h and maintained at such high level up to 24 h post exposure. In contrast, metsulfuron-methyl (500 mg/L) treatment did not affect the expression of CYP81A6 in Jiazhe B within 80 h; thereafter the expression peaked at 120 h and returned gradually to basal levels by Day 6. We suggest that a metabolite of metsulfuron-methyl, 1H-2,3-benzothiazin-4-(3H)-one-2,2-dioxide, is likely to be responsible for inducing CYP81A6 expression, rather than the metsulfuron-methyl itself. Use of a promoter-GUS reporter construct (CYP81A6Pro::GUS) demonstrated that CYP81A6 was constitutively expressed throughout the plant, with the highest expression in the upper surfaces of leaves. Subcellular localization studies in rice protoplasts showed that CYP81A6 was localized in the endoplasmic reticulum. These observations advance our understanding of CYP81A6 expression in rice, particularly its response to the two herbicides.
Collapse
Affiliation(s)
- Hai-ping Lu
- State Key Laboratory of Rice Biology, Institute of Crop Sciences, Zhejiang University, Hangzhou 310029, China; Newcastle Institute for Research on Environment, School of Biology, University of Newcastle, Newcastle upon Tyne, NE1 7RU, UK; Jiaxing Academy of Agricultural Sciences, Jiaxing 314016, China
| | | | | | | | | | | | | | | |
Collapse
|
39
|
Chen S, McElroy JS, Flessner ML, Dane F. Utilizing next-generation sequencing to study homeologous polymorphisms and herbicide-resistance-endowing mutations in Poa annua acetolactate synthase genes. PEST MANAGEMENT SCIENCE 2015; 71:1141-8. [PMID: 25180862 DOI: 10.1002/ps.3897] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Revised: 08/25/2014] [Accepted: 08/27/2014] [Indexed: 05/25/2023]
Abstract
BACKGROUND Detection of single nucleotide polymorphisms (SNPs) related to herbicide resistance in non-model polyploid weed species is fraught with difficulty owing to the gene duplication and lack of reference sequences. Our research seeks to overcome these obstacles by Illumina HiSeq read mapping, SNP calling and allele frequency determinations. Our focus is on the acetolactate synthase (ALS) gene, the target site of ALS-inhibiting herbicides, in Poa annua, an allotetraploid weed species originating from two diploid parents, P. supina and P. infirma. RESULTS ALS contigs with complete coding regions of P. supina, P. infirma and P. annua were assembled and compared with ALS genes from other plant species. The ALS infirma-homeolog of P. annua showed higher levels of nucleotide sequence variability than the supina-homeolog. Comparisons of read mappings of P. annua and a simulated P. supina × P. infirma hybrid showed high resemblance. Two homeolog-specific primer pairs were designed and used to amplify a 1860 bp region covering all resistance-conferring codons in the ALS gene. Four P. annua populations, GN, RB, GW and LG, showed high resistance to two ALS inhibitors, bispyribac-sodium and foramsulfuron, and two populations, HD and RS, showed lower resistance in the rate-response trial. Mutations conferring Trp-574-Leu substitution were observed in the infirma-homeolog of GN and RB and in the supina-homeolog of GW and LG, but no resistance-conferring mutation was observed in the two populations of lower resistance, HD and RS. CONCLUSION In this study we have demonstrated the use of NGS data to study homeologous polymorphisms, parentage and herbicide resistance in an allotetraploid weed species, P. annua. Complete coding sequences of the ALS gene were assembled for P. infirma, P. supina, infirma-homeolog and supina-homeolog in P. annua. A pipeline consisting of read mapping, SNP calling and allele frequency calculation was developed to study the parentage of P. annua, which provided a new perspective on this topic besides the views of morphology, karyotype and phylogeny. Our two homeolog-specific primer pairs can be utilized in future research to separate the homeologs of the ALS gene in P. annua and cover all the codons that have been reported to confer herbicide resistance.
Collapse
Affiliation(s)
- Shu Chen
- Department of Crop, Soil and Environmental Science, Auburn University, Auburn, AL, USA
| | - J Scott McElroy
- Department of Crop, Soil and Environmental Science, Auburn University, Auburn, AL, USA
| | - Michael L Flessner
- Department of Crop, Soil and Environmental Science, Auburn University, Auburn, AL, USA
| | - Fenny Dane
- Department of Horticulture, Auburn University, Auburn, AL, USA
| |
Collapse
|
40
|
Synthesis and evaluation of novel N-(4′-arylpyrimidin-2′-yl) sulfonylurea derivatives as potential antifungal agents. Chem Res Chin Univ 2015. [DOI: 10.1007/s40242-015-4362-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
41
|
Herbicides: History, Classification and Genetic Manipulation of Plants for Herbicide Resistance. SUSTAINABLE AGRICULTURE REVIEWS 2015. [DOI: 10.1007/978-3-319-09132-7_3] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
42
|
Liu W, Yuan G, Du L, Guo W, Li L, Bi Y, Wang J. A novel Pro197Glu substitution in acetolactate synthase (ALS) confers broad-spectrum resistance across ALS inhibitors. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2015; 117:31-8. [PMID: 25619909 DOI: 10.1016/j.pestbp.2014.10.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2014] [Revised: 10/04/2014] [Accepted: 10/04/2014] [Indexed: 05/13/2023]
Abstract
Water chickweed (Myosoton aquaticum L.), a competitive broadleaf weed, is widespread in wheat fields in China. Tribenuron and pyroxsulam failed to control water chickweed in the same field in Qiaotian Village in 2011 and 2012, respectively. An initial tribenuron resistance confirmation test identified a resistant population (AH02). ALS gene sequencing revealed a previously unreported substitution of Glu for Pro at amino acid position 197 in resistant individuals. A purified subpopulation (WRR04) that was individually homozygous for the Pro197Glu substitution was generated and characterized in terms of its response to different classes of ALS inhibitors. A whole-plant experiment showed that the WRR04 population exhibited broad-spectrum resistance to tribenuron (SU, 318-fold), pyrithiobac sodium (PTB, > 197-fold), pyroxsulam (TP, 81-fold), florasulam (TP, > 36-fold) and imazethapyr (IMI, 11-fold). An in vitro ALS assay confirmed that the ALS from WRR04 showed high resistance to all the tested ALS inhibitors. These results established that the Pro197Glu substitution endows broad-spectrum resistance across ALS inhibitors in water chickweed. In addition, molecular markers were developed to rapidly identify the Pro197Glu mutation.
Collapse
Affiliation(s)
- Weitang Liu
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an 271018, Shandong, China
| | - Guohui Yuan
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an 271018, Shandong, China
| | - Long Du
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an 271018, Shandong, China
| | - Wenlei Guo
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an 271018, Shandong, China
| | - Lingxu Li
- College of Chemistry and Pharmacy Science, Qingdao Agricultural University, Qingdao 266109, Shandong, China
| | - Yaling Bi
- College of Plant Science, Anhui Science and Technology University, Fengyang 233100, Anhui, China
| | - Jinxin Wang
- Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an 271018, Shandong, China.
| |
Collapse
|
43
|
Yu Q, Powles SB. Resistance to AHAS inhibitor herbicides: current understanding. PEST MANAGEMENT SCIENCE 2014; 70:1340-50. [PMID: 24338926 DOI: 10.1002/ps.3710] [Citation(s) in RCA: 186] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2013] [Revised: 12/08/2013] [Accepted: 12/14/2013] [Indexed: 05/04/2023]
Abstract
Acetohydroxyacid synthase (AHAS) inhibitor herbicides currently comprise the largest site-of-action group (with 54 active ingredients across five chemical groups) and have been widely used in world agriculture since they were first introduced in 1982. Resistance evolution in weeds to AHAS inhibitors has been rapid and identified in populations of many weed species. Often, evolved resistance is associated with point mutations in the target AHAS gene; however non-target-site enhanced herbicide metabolism occurs as well. Many AHAS gene resistance mutations can occur and be rapidly enriched owing to a high initial resistance gene frequency, simple and dominant genetic inheritance and lack of major fitness cost of the resistance alleles. Major advances in the elucidation of the crystal structure of the AHAS (Arabidopsis thaliana) catalytic subunit in complex with various AHAS inhibitor herbicides have greatly improved current understanding of the detailed molecular interactions between AHAS, cofactors and herbicides. Compared with target-site resistance, non-target-site resistance to AHAS inhibitor herbicides is less studied and hence less understood. In a few well-studied cases, non-target-site resistance is due to enhanced rates of herbicide metabolism (metabolic resistance), mimicking that occurring in tolerant crop species and often involving cytochrome P450 monooxygenases. However, the specific herbicide-metabolising, resistance-endowing genes are yet to be identified in resistant weed species. The current state of mechanistic understanding of AHAS inhibitor herbicide resistance is reviewed, and outstanding research issues are outlined.
Collapse
Affiliation(s)
- Qin Yu
- Australian Herbicide Resistance Initiative, School of Plant Biology, University of Western Australia, Crawley, WA, Australia
| | | |
Collapse
|
44
|
Jin J, Qi X, Yao D, Mao B, Li J, Zhang Q, Chen C. Rational Design and Screening Study of Novel Lead Compound Based on Acetohydroxyacid Synthase Structure. Chem Biol Drug Des 2014; 84:316-24. [DOI: 10.1111/cbdd.12320] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2014] [Revised: 03/03/2014] [Accepted: 03/03/2014] [Indexed: 11/27/2022]
Affiliation(s)
- Jingnan Jin
- College of Science Huazhong Agricultural University Wuhan 430070 China
| | - Xiaojuan Qi
- College of Science Huazhong Agricultural University Wuhan 430070 China
| | - Dandan Yao
- College of Science Huazhong Agricultural University Wuhan 430070 China
| | - Bangqiang Mao
- College of Science Huazhong Agricultural University Wuhan 430070 China
| | - Jianhong Li
- Department of Plant Protection Huazhong Agricultural University Wuhan 430070 China
| | - Qingye Zhang
- College of Science Huazhong Agricultural University Wuhan 430070 China
| | - Changshui Chen
- College of Science Huazhong Agricultural University Wuhan 430070 China
| |
Collapse
|
45
|
Jaña GA, Delgado EJ, Medina FE. How Important Is the Synclinal Conformation of Sulfonylureas To Explain the Inhibition of AHAS: A Theoretical Study. J Chem Inf Model 2014; 54:926-32. [DOI: 10.1021/ci400721y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gonzalo A. Jaña
- Departamento
de CienciasQuímicas, Facultad de Ciencias
Exactas, Sede Concepción, Universidad Andres Bello, Concepción, Chile
| | - Eduardo J. Delgado
- Computational
Biological Chemistry Group, Faculty of Chemical
Sciencies, Universidad de Concepción, Concepción, Chile
| | - Fabiola E. Medina
- Departamento
de CienciasQuímicas, Facultad de Ciencias
Exactas, Sede Concepción, Universidad Andres Bello, Concepción, Chile
| |
Collapse
|
46
|
Sánchez L, Jaña GA, Delgado EJ. A QM/MM study on the reaction pathway leading to 2-Aceto-2-hydroxybutyrate in the catalytic cycle of AHAS. J Comput Chem 2014; 35:488-94. [DOI: 10.1002/jcc.23523] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2013] [Revised: 11/30/2013] [Accepted: 12/15/2013] [Indexed: 11/05/2022]
Affiliation(s)
- Leslie Sánchez
- Computational Biological Chemistry Group, Faculty of Chemical Sciences; Universidad de Concepción; Concepción
| | - Gonzalo A. Jaña
- Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Sede Concepción; Universidad Andrés Bello; Concepcion
| | - Eduardo J. Delgado
- Computational Biological Chemistry Group, Faculty of Chemical Sciences; Universidad de Concepción; Concepción
| |
Collapse
|
47
|
Sada Y, Ikeda H, Yamato S, Kizawa S. Characterization of sulfonylurea-resistant Schoenoplectus juncoides having a target-site Asp(376)Glu mutation in the acetolactate synthase. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2013; 107:106-11. [PMID: 25149243 DOI: 10.1016/j.pestbp.2013.05.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2013] [Revised: 05/23/2013] [Accepted: 05/23/2013] [Indexed: 05/27/2023]
Abstract
Schoenoplectus juncoides, a noxious weed for paddy rice, is known to become resistant to sulfonylurea (SU) herbicides by a target-site mutation in either of the two acetolactate synthase (ALS) genes (ALS1 and ALS2). SU-resistant S. juncoides plants having an Asp376Glu mutation in ALS2 were found from a paddy rice field in Japan, but their resistance profile has not been quantitatively investigated. In this study, dose-response of the SU-resistant accession was compared with that of a SU-susceptible accession at in vivo whole-plant level as well as at in vitro enzymatic level. In whole-plant tests, resistance factors (RFs) based on 50% growth reduction (GR50) for imazosulfuron (ISF), bensulfuron-methyl (BSM), metsulfuron-methyl (MSM), bispyribac-sodium (BPS), and imazaquin (IMQ) were 176, 40, 14, 5.2 and 1.5, respectively. Thus, the accession having an Asp376Glu mutation in ALS2 was highly resistant to the three SU herbicides and moderately resistant to BPS, but was not substantially resistant to IMQ. This is slightly different from the earlier results reported from other weeds with an Asp376Glu mutation, in which the mutation confers resistance to broadly all the chemical classes of ALS-inhibiting herbicides. In enzymatic tests, ALS2 of S. juncoides was expressed in E. coli; the resultant ALS2 was subjected to an in vitro assay. RFs of the mutated ALS2 based on 50% enzymatic inhibition (I50) for ISF, BSM, MSM, BPS, and IMQ were 3699, 2438, 322, 80, and 4.8, respectively. The RFs of ALS2 were highly correlated with those of the whole-plant; this suggests that the Asp376Glu mutation in ALS2 is a molecular basis for the whole-plant resistance. The presence of two ALS genes in S. juncoides can at least partially explain why the whole-plant RFs were less than those of the expressed ALS2 enzymes.
Collapse
Affiliation(s)
- Yoshinao Sada
- Health and Crop Sciences Research Laboratory, Sumitomo Chemical Co., Ltd, Takarazuka, Hyogo, Japan; Crop Protection Division - International, Sumitomo Chemical Co., Ltd, Tokyo, Japan.
| | - Hajime Ikeda
- Health and Crop Sciences Research Laboratory, Sumitomo Chemical Co., Ltd, Takarazuka, Hyogo, Japan
| | - Seiji Yamato
- Health and Crop Sciences Research Laboratory, Sumitomo Chemical Co., Ltd, Takarazuka, Hyogo, Japan
| | - Satoru Kizawa
- Health and Crop Sciences Research Laboratory, Sumitomo Chemical Co., Ltd, Takarazuka, Hyogo, Japan
| |
Collapse
|
48
|
Carvalhais LC, Dennis PG, Fan B, Fedoseyenko D, Kierul K, Becker A, von Wiren N, Borriss R. Linking plant nutritional status to plant-microbe interactions. PLoS One 2013; 8:e68555. [PMID: 23874669 PMCID: PMC3713015 DOI: 10.1371/journal.pone.0068555] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2013] [Accepted: 05/30/2013] [Indexed: 11/17/2022] Open
Abstract
Plants have developed a wide-range of adaptations to overcome nutrient limitation, including changes to the quantity and composition of carbon-containing compounds released by roots. Root-associated bacteria are largely influenced by these compounds which can be perceived as signals or substrates. Here, we evaluate the effect of root exudates collected from maize plants grown under nitrogen (N), phosphate (P), iron (Fe) and potassium (K) deficiencies on the transcriptome of the plant growth promoting rhizobacterium (PGPR) Bacillus amyloliquefaciens FZB42. The largest shifts in gene expression patterns were observed in cells exposed to exudates from N-, followed by P-deficient plants. Exudates from N-deprived maize triggered a general stress response in FZB42 in the exponential growth phase, which was evidenced by the suppression of numerous genes involved in protein synthesis. Exudates from P-deficient plants induced bacterial genes involved in chemotaxis and motility whilst exudates released by Fe and K deficient plants did not cause dramatic changes in the bacterial transcriptome during exponential growth phase. Global transcriptional changes in bacteria elicited by nutrient deficient maize exudates were significantly correlated with concentrations of the amino acids aspartate, valine and glutamate in root exudates suggesting that transcriptional profiling of FZB42 associated with metabolomics of N, P, Fe and K-deficient maize root exudates is a powerful approach to better understand plant-microbe interactions under conditions of nutritional stress.
Collapse
Affiliation(s)
- Lilia C. Carvalhais
- Molecular Plant Nutrition, University of Hohenheim, Stuttgart, Germany
- Bakteriengenetik, Institut für Biologie, Humboldt Universität Berlin, Berlin, Germany
| | - Paul G. Dennis
- Australian Centre for Ecogenomics, School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Queensland, Australia
- Advanced Water Management Centre, The University of Queensland, Brisbane, Queensland, Australia
| | - Ben Fan
- Institute of Forest Protection, Nanjing Forestry University, Nanjing, China
| | - Dmitri Fedoseyenko
- Molecular Plant Nutrition, University of Hohenheim, Stuttgart, Germany
- Molecular Plant Nutrition, Leibniz-Institute for Plant Genetics and Crop Plant Research, Gatersleben, Germany
| | - Kinga Kierul
- Bakteriengenetik, Institut für Biologie, Humboldt Universität Berlin, Berlin, Germany
| | - Anke Becker
- Molekulare Genetik, Institut für Biologie III, Albert-Ludwigs-Universität, Freiburg, Germany
| | - Nicolaus von Wiren
- Molecular Plant Nutrition, University of Hohenheim, Stuttgart, Germany
- Molecular Plant Nutrition, Leibniz-Institute for Plant Genetics and Crop Plant Research, Gatersleben, Germany
| | - Rainer Borriss
- Bakteriengenetik, Institut für Biologie, Humboldt Universität Berlin, Berlin, Germany
- ABiTEP GmbH, Berlin, Germany
| |
Collapse
|
49
|
Li ZS, Wang WM, Lu W, Niu CW, Li YH, Li ZM, Wang JG. Synthesis and biological evaluation of nonsymmetrical aromatic disulfides as novel inhibitors of acetohydroxyacid synthase. Bioorg Med Chem Lett 2013; 23:3723-7. [PMID: 23726033 DOI: 10.1016/j.bmcl.2013.05.013] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2013] [Revised: 05/03/2013] [Accepted: 05/07/2013] [Indexed: 11/15/2022]
Abstract
46 Novel nonsymmetrical aromatic disulfides containing [1,3,4]thiadiazole or [1,3,4]oxadiazole groups were synthesized and their biological activities were evaluated as inhibitors of acetohydroxyacid synthase (AHAS, EC 2.2.1.6). Besides their strong in vitro inhibition against plant AHAS, compounds 3e and 3f also display 80-100% post-emergence herbicidal activities in greenhouse bioassay at 1500g /ha dosage. The assay of exogenous branched-chain amino acids supplementation on rape root growth of 3e suggests that the herbicidal activity has relationship with AHAS inhibition.
Collapse
Affiliation(s)
- Zai-Shun Li
- State-Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, PR China
| | | | | | | | | | | | | |
Collapse
|
50
|
Identification and evaluation of novel acetolactate synthase inhibitors as antifungal agents. Antimicrob Agents Chemother 2013; 57:2272-80. [PMID: 23478965 DOI: 10.1128/aac.01809-12] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
High-throughput phenotypic screening against the yeast Saccharomyces cerevisiae revealed a series of triazolopyrimidine-sulfonamide compounds with broad-spectrum antifungal activity, no significant cytotoxicity, and low protein binding. To elucidate the target of this series, we have applied a chemogenomic profiling approach using the S. cerevisiae deletion collection. All compounds of the series yielded highly similar profiles that suggested acetolactate synthase (Ilv2p, which catalyzes the first common step in branched-chain amino acid biosynthesis) as a possible target. The high correlation with profiles of known Ilv2p inhibitors like chlorimuron-ethyl provided further evidence for a similar mechanism of action. Genome-wide mutagenesis in S. cerevisiae identified 13 resistant clones with 3 different mutations in the catalytic subunit of acetolactate synthase that also conferred cross-resistance to established Ilv2p inhibitors. Mapping of the mutations into the published Ilv2p crystal structure outlined the chlorimuron-ethyl binding cavity, and it was possible to dock the triazolopyrimidine-sulfonamide compound into this pocket in silico. However, fungal growth inhibition could be bypassed through supplementation with exogenous branched-chain amino acids or by the addition of serum to the medium in all of the fungal organisms tested except for Aspergillus fumigatus. Thus, these data support the identification of the triazolopyrimidine-sulfonamide compounds as inhibitors of acetolactate synthase but suggest that targeting may be compromised due to the possibility of nutrient bypass in vivo.
Collapse
|