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Roles of Two-Component Signal Transduction Systems in Shigella Virulence. Biomolecules 2022; 12:biom12091321. [PMID: 36139160 PMCID: PMC9496106 DOI: 10.3390/biom12091321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 09/12/2022] [Accepted: 09/13/2022] [Indexed: 11/17/2022] Open
Abstract
Two-component signal transduction systems (TCSs) are widespread types of protein machinery, typically consisting of a histidine kinase membrane sensor and a cytoplasmic transcriptional regulator that can sense and respond to environmental signals. TCSs are responsible for modulating genes involved in a multitude of bacterial functions, including cell division, motility, differentiation, biofilm formation, antibiotic resistance, and virulence. Pathogenic bacteria exploit the capabilities of TCSs to reprogram gene expression according to the different niches they encounter during host infection. This review focuses on the role of TCSs in regulating the virulence phenotype of Shigella, an intracellular pathogen responsible for severe human enteric syndrome. The pathogenicity of Shigella is the result of the complex action of a wide number of virulence determinants located on the chromosome and on a large virulence plasmid. In particular, we will discuss how five TCSs, EnvZ/OmpR, CpxA/CpxR, ArcB/ArcA, PhoQ/PhoP, and EvgS/EvgA, contribute to linking environmental stimuli to the expression of genes related to virulence and fitness within the host. Considering the relevance of TCSs in the expression of virulence in pathogenic bacteria, the identification of drugs that inhibit TCS function may represent a promising approach to combat bacterial infections.
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Chen H, Yu C, Wu H, Li G, Li C, Hong W, Yang X, Wang H, You X. Recent Advances in Histidine Kinase-Targeted Antimicrobial Agents. Front Chem 2022; 10:866392. [PMID: 35860627 PMCID: PMC9289397 DOI: 10.3389/fchem.2022.866392] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 05/16/2022] [Indexed: 11/15/2022] Open
Abstract
The prevalence of antimicrobial-resistant pathogens significantly limited the number of effective antibiotics available clinically, which urgently requires new drug targets to screen, design, and develop novel antibacterial drugs. Two-component system (TCS), which is comprised of a histidine kinase (HK) and a response regulator (RR), is a common mechanism whereby bacteria can sense a range of stimuli and make an appropriate adaptive response. HKs as the sensor part of the bacterial TCS can regulate various processes such as growth, vitality, antibiotic resistance, and virulence, and have been considered as a promising target for antibacterial drugs. In the current review, we highlighted the structural basis and functional importance of bacterial TCS especially HKs as a target in the discovery of new antimicrobials, and summarize the latest research progress of small-molecule HK-inhibitors as potential novel antimicrobial drugs reported in the past decade.
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Affiliation(s)
- Hongtong Chen
- Laboratory of Pharmacology/Beijing Key Laboratory of Antimicrobial Agents, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Chengqi Yu
- School of Basic Medical Science, Capital Medical University, Beijing, China
| | - Han Wu
- School of Pharmacy, Minzu University of China, Beijing, China
- Key Laboratory of Ethnomedicine (Minzu University of China), Ministry of Education, Beijing, China
| | - Guoqing Li
- Laboratory of Pharmacology/Beijing Key Laboratory of Antimicrobial Agents, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Congran Li
- Laboratory of Pharmacology/Beijing Key Laboratory of Antimicrobial Agents, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Wei Hong
- Beijing Institute of Collaborative Innovation, Beijing, China
| | - Xinyi Yang
- Laboratory of Pharmacology/Beijing Key Laboratory of Antimicrobial Agents, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
- *Correspondence: Xinyi Yang, ; Hao Wang, ; Xuefu You,
| | - Hao Wang
- School of Pharmacy, Minzu University of China, Beijing, China
- Key Laboratory of Ethnomedicine (Minzu University of China), Ministry of Education, Beijing, China
- Institute of National Security, Minzu University of China, Beijing, China
- *Correspondence: Xinyi Yang, ; Hao Wang, ; Xuefu You,
| | - Xuefu You
- Laboratory of Pharmacology/Beijing Key Laboratory of Antimicrobial Agents, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
- *Correspondence: Xinyi Yang, ; Hao Wang, ; Xuefu You,
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Anti-Quorum Sensing Activities of Gliptins against Pseudomonas aeruginosa and Staphylococcus aureus. Biomedicines 2022; 10:biomedicines10051169. [PMID: 35625906 PMCID: PMC9138634 DOI: 10.3390/biomedicines10051169] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 05/16/2022] [Accepted: 05/16/2022] [Indexed: 12/24/2022] Open
Abstract
The development of bacterial resistance to traditional antibiotics constitutes an emerging public health issue. Promising approaches have been innovated to conquer bacterial resistance, and targeting bacterial virulence is one of these approaches. Bacterial virulence mitigation offers several merits, as antivirulence agents do not affect the growth of bacteria and hence do not induce bacteria to develop resistance. In this direction, numerous drugs have been repurposed as antivirulence agents prior to their clinical use alone or in combination with traditional antibiotics. Quorum sensing (QS) plays a key role in controlling bacterial virulence. In the current study, dipeptidase inhibitor-4 (DPI-4) antidiabetic gliptins were screened for their antivirulence and anti-quorum sensing (anti-QS) activities against Gram-negative Pseudomonas aeruginosa and Gram-positive Staphylococcus aureus. Upon assessing their antibiofilm activities, the ten tested gliptins significantly diminished biofilm formation. In particular, sitagliptin exhibited the most efficient antibiofilm activity, so it was chosen as a representative of all gliptins to further investigate its antivirulence activity. Sitagliptin significantly protected mice from P. aeruginosa and S. aureus pathogenesis. Furthermore, sitagliptin downregulated QS-encoding genes in P. aeruginosa and S. aureus. To test the anti-QS activities of gliptins, a detailed molecular docking study was conducted to evaluate the gliptins’ binding affinities to P. aeruginosa and S. aureus QS receptors, which helped explain the anti-QS activities of gliptins, particularly sitagliptin and omarigliptin. In conclusion, this study evaluates the possible antivirulence and anti-QS activities of gliptins that could be promising novel candidates for the treatment of aggressive Gram-negative or -positive bacterial infections either alone or as adjuvants to other antibiotics.
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Khayat MT, Abbas HA, Ibrahim TS, Khayyat AN, Alharbi M, Darwish KM, Elhady SS, Khafagy ES, Safo MK, Hegazy WAH. Anti-Quorum Sensing Activities of Gliptins against Pseudomonas aeruginosa and Staphylococcus aureus. Biomedicines 2022; 10:1169. [PMID: 35625906 PMCID: PMC9138634 DOI: 10.3389/fmolb.2023.1203672activities 10.3390/biomedicines10051169] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 05/16/2022] [Accepted: 05/16/2022] [Indexed: 07/07/2024] Open
Abstract
The development of bacterial resistance to traditional antibiotics constitutes an emerging public health issue. Promising approaches have been innovated to conquer bacterial resistance, and targeting bacterial virulence is one of these approaches. Bacterial virulence mitigation offers several merits, as antivirulence agents do not affect the growth of bacteria and hence do not induce bacteria to develop resistance. In this direction, numerous drugs have been repurposed as antivirulence agents prior to their clinical use alone or in combination with traditional antibiotics. Quorum sensing (QS) plays a key role in controlling bacterial virulence. In the current study, dipeptidase inhibitor-4 (DPI-4) antidiabetic gliptins were screened for their antivirulence and anti-quorum sensing (anti-QS) activities against Gram-negative Pseudomonas aeruginosa and Gram-positive Staphylococcus aureus. Upon assessing their antibiofilm activities, the ten tested gliptins significantly diminished biofilm formation. In particular, sitagliptin exhibited the most efficient antibiofilm activity, so it was chosen as a representative of all gliptins to further investigate its antivirulence activity. Sitagliptin significantly protected mice from P. aeruginosa and S. aureus pathogenesis. Furthermore, sitagliptin downregulated QS-encoding genes in P. aeruginosa and S. aureus. To test the anti-QS activities of gliptins, a detailed molecular docking study was conducted to evaluate the gliptins' binding affinities to P. aeruginosa and S. aureus QS receptors, which helped explain the anti-QS activities of gliptins, particularly sitagliptin and omarigliptin. In conclusion, this study evaluates the possible antivirulence and anti-QS activities of gliptins that could be promising novel candidates for the treatment of aggressive Gram-negative or -positive bacterial infections either alone or as adjuvants to other antibiotics.
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Affiliation(s)
- Maan T. Khayat
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (T.S.I.); (A.N.K.); (M.A.)
| | - Hisham A. Abbas
- Department of Microbiology and Immunology, Faculty of Pharmacy, Zagazig University, Zagazig 44519, Egypt;
| | - Tarek S. Ibrahim
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (T.S.I.); (A.N.K.); (M.A.)
| | - Ahdab N. Khayyat
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (T.S.I.); (A.N.K.); (M.A.)
| | - Majed Alharbi
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (T.S.I.); (A.N.K.); (M.A.)
| | - Khaled M. Darwish
- Department of Medicinal Chemistry, Faculty of Pharmacy, Suez Canal University, Ismailia 41522, Egypt;
| | - Sameh S. Elhady
- Department of Natural Products, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia;
| | - El-Sayed Khafagy
- Department of Pharmaceutics, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia;
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Suez Canal University, Ismailia 41552, Egypt
| | - Martin K. Safo
- Department of Medicinal Chemistry, School of Pharmacy, Virginia Commonwealth University, Richmond, VA 23219, USA;
| | - Wael A. H. Hegazy
- Department of Microbiology and Immunology, Faculty of Pharmacy, Zagazig University, Zagazig 44519, Egypt;
- Department of Pharmaceutical Sciences, Pharmacy Program, Oman College of Health Sciences, Muscat 113, Oman
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van Gent ME, van der Reijden TJK, Lennard PR, de Visser AW, Schonkeren-Ravensbergen B, Dolezal N, Cordfunke RA, Drijfhout JW, Nibbering PH. Synergism between the Synthetic Antibacterial and Antibiofilm Peptide (SAAP)-148 and Halicin. Antibiotics (Basel) 2022; 11:antibiotics11050673. [PMID: 35625317 PMCID: PMC9137631 DOI: 10.3390/antibiotics11050673] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 05/05/2022] [Accepted: 05/13/2022] [Indexed: 12/07/2022] Open
Abstract
Recently, using a deep learning approach, the novel antibiotic halicin was discovered. We compared the antibacterial activities of two novel bactericidal antimicrobial agents, i.e., the synthetic antibacterial and antibiofilm peptide (SAAP)-148 with this antibiotic halicin. Results revealed that SAAP-148 was more effective than halicin in killing planktonic bacteria of antimicrobial-resistant (AMR) Escherichia coli, Acinetobacter baumannii and Staphylococcus aureus, especially in biologically relevant media, such as plasma and urine, and in 3D human infection models. Surprisingly, SAAP-148 and halicin were equally effective against these bacteria residing in immature and mature biofilms. As their modes of action differ, potential favorable interactions between SAAP-148 and halicin were investigated. For some specific strains of AMR E. coli and S. aureus synergism between these agents was observed, whereas for other strains, additive interactions were noted. These favorable interactions were confirmed for AMR E. coli in a 3D human bladder infection model and AMR S. aureus in a 3D human epidermal infection model. Together, combinations of these two novel antimicrobial agents hold promise as an innovative treatment for infections not effectively treatable with current antibiotics.
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Affiliation(s)
- Miriam E. van Gent
- Department of Infectious Diseases, Leiden University Medical Center, 2300 RC Leiden, The Netherlands; (T.J.K.v.d.R.); (P.R.L.); (A.W.d.V.); (B.S.-R.); (P.H.N.)
- Correspondence:
| | - Tanny J. K. van der Reijden
- Department of Infectious Diseases, Leiden University Medical Center, 2300 RC Leiden, The Netherlands; (T.J.K.v.d.R.); (P.R.L.); (A.W.d.V.); (B.S.-R.); (P.H.N.)
| | - Patrick R. Lennard
- Department of Infectious Diseases, Leiden University Medical Center, 2300 RC Leiden, The Netherlands; (T.J.K.v.d.R.); (P.R.L.); (A.W.d.V.); (B.S.-R.); (P.H.N.)
- Department of Pulmonology, Leiden University Medical Center, 2300 RC Leiden, The Netherlands
- Center for Inflammation Research, Queen’s Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, UK
| | - Adriëtte W. de Visser
- Department of Infectious Diseases, Leiden University Medical Center, 2300 RC Leiden, The Netherlands; (T.J.K.v.d.R.); (P.R.L.); (A.W.d.V.); (B.S.-R.); (P.H.N.)
| | - Bep Schonkeren-Ravensbergen
- Department of Infectious Diseases, Leiden University Medical Center, 2300 RC Leiden, The Netherlands; (T.J.K.v.d.R.); (P.R.L.); (A.W.d.V.); (B.S.-R.); (P.H.N.)
| | - Natasja Dolezal
- Department of Immunology, Leiden University Medical Center, 2300 RC Leiden, The Netherlands; (N.D.); (R.A.C.); (J.W.D.)
| | - Robert A. Cordfunke
- Department of Immunology, Leiden University Medical Center, 2300 RC Leiden, The Netherlands; (N.D.); (R.A.C.); (J.W.D.)
| | - Jan Wouter Drijfhout
- Department of Immunology, Leiden University Medical Center, 2300 RC Leiden, The Netherlands; (N.D.); (R.A.C.); (J.W.D.)
| | - Peter H. Nibbering
- Department of Infectious Diseases, Leiden University Medical Center, 2300 RC Leiden, The Netherlands; (T.J.K.v.d.R.); (P.R.L.); (A.W.d.V.); (B.S.-R.); (P.H.N.)
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Design, synthesis and molecular modeling study of substituted indoline-2-ones and spiro[indole-heterocycles] with potential activity against Gram-positive bacteria. ACTA PHARMACEUTICA (ZAGREB, CROATIA) 2022; 72:79-95. [PMID: 36651522 DOI: 10.2478/acph-2022-0004] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 01/17/2021] [Indexed: 01/20/2023]
Abstract
Longstanding and firsthand infectious diseases are challenging community health threats. A new series of isatin derivatives bearing β-hydroxy ketone, chalcone, or spiro-heterocycle moiety, was synthesized in a good yield. Chemical structures of the synthesized compounds were elucidated using spectroscopic techniques and elemental analysis. Antibacterial activities of the compounds were then evaluated in vitro and by in silico modeling. The compounds were more active against Gram-positive bacteria, Staphylococcus aureus (MIC = 0.026-0.226 mmol L-1) and Bacillus subtilis (MIC = 0.348-1.723 mmol L-1) than against Gram-negative bacteria (MIC = 0.817-7.393 mmol L-1). Only 3-hydroxy-3-(2-(2,5-dimethylthiophen-3-yl)-2-oxoethyl)indolin-2-one (1b) was found as active as imipenem against S. aureus (MIC = 0.026 mmol L-1). In silico docking of the compounds in the binding sites of a homology modeled structure of S. aureus histidine kinase-Walk allowed us to shed light on the binding mode of these novel inhibitors. The highest antibacterial activity of 1b is consistent with its highest docking score values against S. aureus histidine kinase.
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Radwan A, Mahrous GM. Docking studies and molecular dynamics simulations of the binding characteristics of waldiomycin and its methyl ester analog to Staphylococcus aureus histidine kinase. PLoS One 2020; 15:e0234215. [PMID: 32502195 PMCID: PMC7274439 DOI: 10.1371/journal.pone.0234215] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Accepted: 05/20/2020] [Indexed: 12/13/2022] Open
Abstract
Bacterial histidine kinases (HKs) are considered attractive drug targets because of their ability to govern adaptive responses coupled with their ubiquity. There are several classes of HK inhibitors; however, they suffer from drug resistance, poor bioavailability, and a lack of selectivity. The 3D structure of Staphylococcus aureus HK was not isolated in high-resolution coordinates, precluding further disclosure of structure-dependent binding to the specific antibiotics. To elucidate structure-dependent binding, the 3D structure of the catalytic domain WalK of S. aureus HK was constructed using homology modeling to investigate the WalK-ligand binding mechanisms through molecular docking studies and molecular dynamics simulations. The binding free energies of the waldiomycin and its methyl ester analog were calculated using molecular mechanics/generalized born surface area scoring. The key residues for protein-ligand binding were postulated. The structural divergence responsible for the 7.4-fold higher potency of waldiomycin than that of its ester analog was clearly observed. The optimized 3D macromolecule-ligand binding modes shed light on the S. aureus HK/WalK-ligand interactions that afford a means to assess binding affinity to design new HK/WalK inhibitors.
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Affiliation(s)
- Awwad Radwan
- Kayyali Chair, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Assiut University, Assiut, Egypt
| | - Gamal M. Mahrous
- Kayyali Chair, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
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Wilke KE, Fihn CA, Carlson EE. Screening serine/threonine and tyrosine kinase inhibitors for histidine kinase inhibition. Bioorg Med Chem 2018; 26:5322-5326. [PMID: 29706527 DOI: 10.1016/j.bmc.2018.04.047] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2018] [Revised: 04/19/2018] [Accepted: 04/20/2018] [Indexed: 10/17/2022]
Abstract
Histidine kinases of bacterial two-component systems are promising antibacterial targets. Despite their varied, numerous roles, enzymes in the histidine kinase superfamily share a catalytic core that may be exploited to inhibit multiple histidine kinases simultaneously. Characterized by the Bergerat fold, the features of the histidine kinase ATP-binding domain are not found in serine/threonine and tyrosine kinases. However, because each kinase family binds the same ATP substrate, we sought to determine if published serine/threonine and tyrosine kinase inhibitors contained scaffolds that would also inhibit histidine kinases. Using select assays, 222 inhibitors from the Roche Published Kinase Set were screened for binding, deactivation, and aggregation of histidine kinases. Not only do the results of our screen support the distinctions between ATP-binding domains of different kinase families, but the lead molecule identified also presents inspiration for further histidine kinase inhibitor development.
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Affiliation(s)
- Kaelyn E Wilke
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, IN 47405, United States
| | - Conrad A Fihn
- Department of Medicinal Chemistry, University of Minnesota, 308 Harvard Street SE, Minneapolis, MN 55455, United States
| | - Erin E Carlson
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, IN 47405, United States; Department of Medicinal Chemistry, University of Minnesota, 308 Harvard Street SE, Minneapolis, MN 55455, United States; Department of Chemistry, University of Minnesota, 207 Pleasant Street SE, Minneapolis, MN 55454, United States; Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, 321 Church Street SE, Minneapolis, MN 55455, United States; Department of Molecular and Cellular Biochemistry, Indiana University, 212 South Hawthorne Drive, Bloomington, IN 47405, United States.
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Vo CD, Shebert HL, Zikovich S, Dryer RA, Huang TP, Moran LJ, Cho J, Wassarman DR, Falahee BE, Young PD, Gu GH, Heinl JF, Hammond JW, Jackvony TN, Frederick TE, Blair JA. Repurposing Hsp90 inhibitors as antibiotics targeting histidine kinases. Bioorg Med Chem Lett 2017; 27:5235-5244. [PMID: 29110989 DOI: 10.1016/j.bmcl.2017.10.036] [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: 06/26/2017] [Revised: 10/05/2017] [Accepted: 10/18/2017] [Indexed: 01/15/2023]
Abstract
To address the growing need for new antimicrobial agents, we explored whether inhibition of bacterial signaling machinery could inhibit bacterial growth. Because bacteria rely on two-component signaling systems to respond to environmental changes, and because these systems are both highly conserved and mediated by histidine kinases, inhibiting histidine kinases may provide broad spectrum antimicrobial activity. The histidine kinase ATP binding domain is conserved with the ATPase domain of eukaryotic Hsp90 molecular chaperones. To find a chemical scaffold for compounds that target histidine kinases, we leveraged this conservation. We screened ATP competitive Hsp90 inhibitors against CckA, an essential histidine kinase in Caulobacter crescentus that controls cell growth, and showed that the diaryl pyrazole is a promising scaffold for histidine kinase inhibition. We synthesized a panel of derivatives and found that they inhibit the histidine kinases C. crescentus CckA and Salmonella PhoQ but not C. crescentus DivJ; and they inhibit bacterial growth in both Gram-negative and Gram-positive bacterial strains.
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Affiliation(s)
- Chau D Vo
- Williams College, Department of Chemistry, 47 Lab Campus Drive, Williamstown, MA 01267, USA
| | - Hanna L Shebert
- Williams College, Department of Chemistry, 47 Lab Campus Drive, Williamstown, MA 01267, USA
| | - Shannon Zikovich
- Williams College, Department of Chemistry, 47 Lab Campus Drive, Williamstown, MA 01267, USA
| | - Rebecca A Dryer
- Williams College, Department of Chemistry, 47 Lab Campus Drive, Williamstown, MA 01267, USA
| | - Tony P Huang
- Williams College, Department of Chemistry, 47 Lab Campus Drive, Williamstown, MA 01267, USA
| | - Lindsey J Moran
- Williams College, Department of Chemistry, 47 Lab Campus Drive, Williamstown, MA 01267, USA
| | - Juno Cho
- Williams College, Department of Chemistry, 47 Lab Campus Drive, Williamstown, MA 01267, USA
| | - Douglas R Wassarman
- Williams College, Department of Chemistry, 47 Lab Campus Drive, Williamstown, MA 01267, USA
| | - Bryn E Falahee
- Williams College, Department of Chemistry, 47 Lab Campus Drive, Williamstown, MA 01267, USA
| | - Peter D Young
- Williams College, Department of Chemistry, 47 Lab Campus Drive, Williamstown, MA 01267, USA
| | - Garrick H Gu
- Williams College, Department of Chemistry, 47 Lab Campus Drive, Williamstown, MA 01267, USA
| | - James F Heinl
- Williams College, Department of Chemistry, 47 Lab Campus Drive, Williamstown, MA 01267, USA
| | - John W Hammond
- Williams College, Department of Chemistry, 47 Lab Campus Drive, Williamstown, MA 01267, USA
| | - Taylor N Jackvony
- Williams College, Department of Chemistry, 47 Lab Campus Drive, Williamstown, MA 01267, USA
| | - Thomas E Frederick
- Department of Biochemistry & Molecular Biophysics, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Jimmy A Blair
- Williams College, Department of Chemistry, 47 Lab Campus Drive, Williamstown, MA 01267, USA.
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10
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Eguchi Y, Okajima T, Tochio N, Inukai Y, Shimizu R, Ueda S, Shinya S, Kigawa T, Fukamizo T, Igarashi M, Utsumi R. Angucycline antibiotic waldiomycin recognizes common structural motif conserved in bacterial histidine kinases. J Antibiot (Tokyo) 2016; 70:251-258. [PMID: 27999439 DOI: 10.1038/ja.2016.151] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Revised: 09/29/2016] [Accepted: 11/21/2016] [Indexed: 12/18/2022]
Abstract
Two-component signal transduction systems (TCSs), composed of a histidine kinase sensor (HK) and its cognate response regulator, sense and respond to environmental changes and are related to the virulence of pathogens. TCSs are potential targets for alternative antibiotics and anti-virulence agents. Here we found that waldiomycin, an angucycline antibiotic that inhibits a growth essential HK, WalK, in Gram-positive bacteria, also inhibits several class I HKs from the Gram-negative Escherichia coli. NMR analyses and site-directed mutagenesis studies using the osmo-sensing EnvZ, a prototypical HK of E. coli, showed that waldiomycin directly binds to both H-box and X-region, which are the two conserved regions in the dimerization-inducing and histidine-containing phosphotransfer (DHp) domain of HKs. Waldiomycin inhibits phosphorylation of the conserved histidine in the H-box. Analysis of waldiomycin derivatives suggests that the angucyclic ring, situated near the H-box in the waldiomycin-EnvZ DHp domain complex model, is responsible for the inhibitory activity. We demonstrate that waldiomycin is an HK inhibitor binding to the H-box region and has the potential of inhibiting a broad spectrum of HKs.
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Affiliation(s)
- Yoko Eguchi
- Department of Bioscience, Graduate School of Agriculture, Kindai University, Nara, Japan.,Department of Science and Technology on Food Safety, Kindai University, Kinokawa, Japan
| | - Toshihide Okajima
- Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Japan.,Department of Chemistry, Osaka Medical College, Takatsuki, Japan
| | - Naoya Tochio
- Research Center for the Mathematics on Chromatin Live Dynamics, Graduate School of Science, Hiroshima University, Higashi-Hiroshima, Japan.,RIKEN Systems and Structural Biology Center, Yokohama, Japan
| | - Yoichi Inukai
- Department of Bioscience, Graduate School of Agriculture, Kindai University, Nara, Japan
| | - Riko Shimizu
- Department of Bioscience, Graduate School of Agriculture, Kindai University, Nara, Japan
| | - Shuhei Ueda
- Department of Bioscience, Graduate School of Agriculture, Kindai University, Nara, Japan
| | - Shoko Shinya
- Department of Bioscience, Graduate School of Agriculture, Kindai University, Nara, Japan
| | - Takanori Kigawa
- RIKEN Systems and Structural Biology Center, Yokohama, Japan
| | - Tamo Fukamizo
- Department of Bioscience, Graduate School of Agriculture, Kindai University, Nara, Japan
| | | | - Ryutaro Utsumi
- Department of Bioscience, Graduate School of Agriculture, Kindai University, Nara, Japan
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11
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References. Antibiotics (Basel) 2015. [DOI: 10.1128/9781555819316.refs] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Immormino RM, Starbird CA, Silversmith RE, Bourret RB. Probing Mechanistic Similarities between Response Regulator Signaling Proteins and Haloacid Dehalogenase Phosphatases. Biochemistry 2015; 54:3514-27. [PMID: 25928369 DOI: 10.1021/acs.biochem.5b00286] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Response regulator signaling proteins and phosphatases of the haloacid dehalogenase (HAD) superfamily share strikingly similar folds, active site geometries, and reaction chemistry. Proteins from both families catalyze the transfer of a phosphoryl group from a substrate to one of their own aspartyl residues, and subsequent hydrolysis of the phosphoprotein. Notable differences include an additional Asp that functions as an acid/base catalyst and an active site well-structured prior to phosphorylation in HAD phosphatases. Both features contribute to reactions substantially faster than those for response regulators. To investigate mechanisms underlying the functional differences between response regulators and HAD phosphatases, we characterized five double mutants of the response regulator CheY designed to mimic HAD phosphatases. Each mutant contained the extra Asp paired with a phosphatase-inspired substitution to potentially position the Asp properly. Only CheY DR (Arg as the anchor) exhibited enhanced rates of both autophosphorylation with phosphoramidate and autodephosphorylation compared to those of wild-type CheY. Crystal structures of CheY DR complexed with MoO4(2-) or WO4(2-) revealed active site hydrogen bonding networks similar to those in HAD·substrate complexes, with the extra Asp positioned for direct interaction with the leaving group (phosphorylation) or nucleophile (dephosphorylation). However, CheY DR reaction kinetics did not exhibit the pH sensitivities expected for acid/base catalysis. Biochemical analysis indicated CheY DR had an enhanced propensity to adopt the active conformation without phosphorylation, but a crystal structure revealed unphosphorylated CheY DR was not locked in the active conformation. Thus, the enhanced reactivity of CheY DR reflected partial acquisition of catalytic and structural features of HAD phosphatases.
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Affiliation(s)
- Robert M Immormino
- Department of Microbiology and Immunology, University of North Carolina, Chapel Hill, North Carolina 27599-7290, United States
| | - Chrystal A Starbird
- Department of Microbiology and Immunology, University of North Carolina, Chapel Hill, North Carolina 27599-7290, United States
| | - Ruth E Silversmith
- Department of Microbiology and Immunology, University of North Carolina, Chapel Hill, North Carolina 27599-7290, United States
| | - Robert B Bourret
- Department of Microbiology and Immunology, University of North Carolina, Chapel Hill, North Carolina 27599-7290, United States
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Wilke K, Francis S, Carlson EE. Inactivation of multiple bacterial histidine kinases by targeting the ATP-binding domain. ACS Chem Biol 2015; 10:328-35. [PMID: 25531939 PMCID: PMC4301073 DOI: 10.1021/cb5008019] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2014] [Accepted: 12/19/2014] [Indexed: 01/14/2023]
Abstract
Antibacterial agents that exploit new targets will be required to combat the perpetual rise of bacterial resistance to current antibiotics. We are exploring the inhibition of histidine kinases, constituents of two-component systems. Two-component systems are the primary signaling pathways that bacteria utilize to respond to their environment. They are ubiquitous in bacteria and trigger various pathogenic mechanisms. To attenuate these signaling pathways, we sought to broadly target the histidine kinase family by focusing on their highly conserved ATP-binding domain. Development of a fluorescence polarization displacement assay facilitated high-throughput screening of ∼53 000 diverse small molecules for binding to the ATP-binding pocket. Of these compounds, nine inhibited the catalytic activity of two or more histidine kinases. These scaffolds could provide valuable starting points for the design of broadly effective HK inhibitors, global reduction of bacterial signaling, and ultimately, a class of antibiotics that function by a new mechanism of action.
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Affiliation(s)
- Kaelyn
E. Wilke
- Department
of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Samson Francis
- Department
of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Erin E. Carlson
- Department
of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
- Department
of Molecular and Cellular Biochemistry, Indiana University, 212 South Hawthorne Drive, Bloomington, Indiana 47405, United States
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