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Sompiyachoke K, Elias MH. Engineering quorum quenching acylases with improved kinetic and biochemical properties. Protein Sci 2024; 33:e4954. [PMID: 38520282 PMCID: PMC10960309 DOI: 10.1002/pro.4954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 01/03/2024] [Accepted: 02/21/2024] [Indexed: 03/25/2024]
Abstract
Many Gram-negative bacteria use N-acyl-L-homoserine lactone (AHL) signals to coordinate phenotypes such as biofilm formation and virulence factor production. Quorum-quenching enzymes, such as AHL acylases, chemically degrade these molecules which prevents signal reception by bacteria and inhibits undesirable biofilm-related traits. These capabilities make acylases appealing candidates for controlling microbes, yet candidates with high activity levels and substrate specificity and that are capable of being formulated into materials are needed. In this work, we undertook engineering efforts against two AHL acylases, PvdQ and MacQ, to generate these improved properties using the Protein One-Stop Shop Server. The engineering of acylases is complicated by low-throughput enzymatic assays. Alleviating this challenge, we report a time-course kinetic assay for AHL acylases that monitors the real-time production of homoserine lactone. Using the assay, we identified variants of PvdQ that were significantly stabilized, with melting point increases of up to 13.2°C, which translated into high resistance against organic solvents and increased compatibility with material coatings. While the MacQ mutants were unexpectedly destabilized, they had considerably improved kinetic properties, with >10-fold increases against N-butyryl-L-homoserine lactone and N-hexanoyl-L-homoserine lactone. Accordingly, these changes resulted in increased quenching abilities using a biosensor model and greater inhibition of virulence factor production of Pseudomonas aeruginosa PA14. While the crystal structure of one of the MacQ variants, M1, did not reveal obvious structural determinants explaining the observed changes in kinetics, it allowed for the capture of an acyl-enzyme intermediate that confirms a previously hypothesized catalytic mechanism of AHL acylases.
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Affiliation(s)
- Kitty Sompiyachoke
- Department of Biochemistry, Molecular Biology and BiophysicsUniversity of MinnesotaSt. PaulMinnesotaUSA
| | - Mikael H. Elias
- Department of Biochemistry, Molecular Biology and BiophysicsUniversity of MinnesotaSt. PaulMinnesotaUSA
- Biotechnology InstituteSt. PaulMinnesotaUSA
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2
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Sompiyachoke K, Elias MH. Engineering Quorum Quenching Acylases with Improved Kinetic and Biochemical Properties. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.09.01.555929. [PMID: 37693529 PMCID: PMC10491313 DOI: 10.1101/2023.09.01.555929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Abstract
Many Gram-negative bacteria respond to N-acyl-L-homoserine lactone (AHL) signals to coordinate phenotypes such as biofilm formation and virulence factor production. Quorum-quenching enzymes, such as acylases, chemically degrade AHL signals, prevent signal reception by bacteria, and inhibit undesirable traits related to biofilm. These capabilities make these enzymes appealing candidates for controlling microbes. Yet, enzyme candidates with high activity levels, high substrate specificity for specific interference, and that are capable of being formulated into materials are needed. In this work, we undertook engineering efforts against two AHL acylases, PvdQ and MacQ, to obtain improved acylase variants. The engineering of acylase is complicated by low-throughput enzymatic assays. To alleviate this challenge, we report a time-course kinetic assay for AHL acylase that tracks the real-time production of homoserine lactone. Using the protein one-stop shop server (PROSS), we identified variants of PvdQ that were significantly stabilized, with melting point increases of up to 13.2 °C, which translated into high resistance against organic solvents and increased compatibility with material coatings. We also generated mutants of MacQ with considerably improved kinetic properties, with >10-fold increases against N-butyryl-L-homoserine lactone and N-hexanoyl-L-homoserine lactone. In fact, the variants presented here exhibit unique combinations of stability and activity levels. Accordingly, these changes resulted in increased quenching abilities using a biosensor model and greater inhibition of virulence factor production of Pseudomonas aeruginosa PA14. While the crystal structure of one of the MacQ variants, M1, did not reveal obvious structural determinants explaining the observed changes in kinetics, it allowed for the capture of an acyl-enzyme intermediate that confirms a previously hypothesized catalytic mechanism of AHL acylases.
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Affiliation(s)
- Kitty Sompiyachoke
- University of Minnesota, Department of Biochemistry, Molecular Biology and Biophysics, St. Paul, MN, 55108, USA
| | - Mikael H. Elias
- University of Minnesota, Department of Biochemistry, Molecular Biology and Biophysics, St. Paul, MN, 55108, USA
- University of Minnesota, Biotechnology Institute, St. Paul, MN, 55108, USA
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3
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Surpeta B, Grulich M, Palyzová A, Marešová H, Brezovsky J. Common Dynamic Determinants Govern Quorum Quenching Activity in N-Terminal Serine Hydrolases. ACS Catal 2022. [DOI: 10.1021/acscatal.2c00569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bartlomiej Surpeta
- Laboratory of Biomolecular Interactions and Transport, Department of Gene Expression, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Uniwersytetu Poznanskiego 6, 61-614 Poznan, Poland
- International Institute of Molecular and Cell Biology in Warsaw, Ks Trojdena 4, 02-109 Warsaw, Poland
| | - Michal Grulich
- Laboratory of Modulation of Gene Expression, Institute of Microbiology,v.v.i., Academy of Sciences of the Czech Republic, Videnska 1083, 142 20 Prague 4, Czech Republic
| | - Andrea Palyzová
- Laboratory of Molecular Structure Characterization, Institute of Microbiology,v.v.i., Academy of Sciences of the Czech Republic, Videnska 1083, 142 20 Prague 4, Czech Republic
| | - Helena Marešová
- Laboratory of Molecular Structure Characterization, Institute of Microbiology,v.v.i., Academy of Sciences of the Czech Republic, Videnska 1083, 142 20 Prague 4, Czech Republic
| | - Jan Brezovsky
- Laboratory of Biomolecular Interactions and Transport, Department of Gene Expression, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Uniwersytetu Poznanskiego 6, 61-614 Poznan, Poland
- International Institute of Molecular and Cell Biology in Warsaw, Ks Trojdena 4, 02-109 Warsaw, Poland
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Shen Y, Cui F, Wang D, Li T, Li J. Quorum Quenching Enzyme (PF-1240) Capable to Degrade AHLs as a Candidate for Inhibiting Quorum Sensing in Food Spoilage Bacterium Hafnia alvei. Foods 2021; 10:foods10112700. [PMID: 34828982 PMCID: PMC8622684 DOI: 10.3390/foods10112700] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 09/29/2021] [Accepted: 10/11/2021] [Indexed: 11/25/2022] Open
Abstract
Quorum sensing (QS) is widely present in microorganisms in marine aquatic products. Owing to the use of antibiotics, many spoilage bacteria in aquatic products are drug resistant. In order to slow down this evolutionary trend, the inhibition of spoilage phenotype of spoilage bacteria by interfering with QS has become a research hot spot in recent years. In this study, we found a new QS quenching enzyme, PF-1240; it was cloned and expressed in Pseudomonas fluorescens 08. Sequence alignment showed that its similarity with N-homoserine lactone (AHL) acylase QuiP protein of Pseudomonas fluorescens (Pf 0-1) was 78.4%. SDS-PAGE confirmed that the protein is a dimer composed of two subunits, which is similar to the structure of AHL acylases. The concentration of heterologous expression in Escherichia coli (DE3) was 26.64 μg/mL. Unlike most AHL acylases, PF-1240 can quench AHLs with different carbon chain lengths and inhibit the quorum sensing of the aquatic spoilage bacterium Hafnia alvei. It can significantly reduce the formation rate of biofilm of H. alvei to 44.4% and the yield of siderophores to 54%, inhibit the production of protease and lipase, and interfere with the motility of H. alvei. Through these corruption phenotypes, the specific application effect of PF-1240 can be further determined to provide a theoretical basis for its application in the preservation of practical aquatic products.
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Affiliation(s)
- Yue Shen
- National & Local Joint Engineering Research Center of Storage, Processing and Safety Control Technology for Fresh Agricultural and Aquatic Products, College of Food Science and Technology, Bohai University, Jinzhou 121013, China; (Y.S.); (F.C.)
| | - Fangchao Cui
- National & Local Joint Engineering Research Center of Storage, Processing and Safety Control Technology for Fresh Agricultural and Aquatic Products, College of Food Science and Technology, Bohai University, Jinzhou 121013, China; (Y.S.); (F.C.)
| | - Dangfeng Wang
- School of Food Science and Technology, Jiangnan University, Wuxi 214000, China;
| | - Tingting Li
- Key Laboratory of Biotechnology and Bioresources Utilization, Dalian Minzu University, Dalian 116000, China
- Correspondence: (T.L.); (J.L.); Tel./Fax: +86-416-3400008 (J.L.)
| | - Jianrong Li
- National & Local Joint Engineering Research Center of Storage, Processing and Safety Control Technology for Fresh Agricultural and Aquatic Products, College of Food Science and Technology, Bohai University, Jinzhou 121013, China; (Y.S.); (F.C.)
- Correspondence: (T.L.); (J.L.); Tel./Fax: +86-416-3400008 (J.L.)
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Serrano-Aguirre L, Velasco-Bucheli R, García-Álvarez B, Saborido A, Arroyo M, de la Mata I. Novel Bifunctional Acylase from Actinoplanes utahensis: A Versatile Enzyme to Synthesize Antimicrobial Compounds and Use in Quorum Quenching Processes. Antibiotics (Basel) 2021; 10:antibiotics10080922. [PMID: 34438972 PMCID: PMC8388760 DOI: 10.3390/antibiotics10080922] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 07/25/2021] [Accepted: 07/27/2021] [Indexed: 12/02/2022] Open
Abstract
Many intercellular communication processes, known as quorum sensing (QS), are regulated by the autoinducers N-acyl-l-homoserine lactones (AHLs) in Gram-negative bacteria. The inactivation of these QS processes using different quorum quenching (QQ) strategies, such as enzymatic degradation of the autoinducers or the receptor blocking with non-active analogs, could be the basis for the development of new antimicrobials. This study details the heterologous expression, purification, and characterization of a novel N-acylhomoserine lactone acylase from Actinoplanes utahensis NRRL 12052 (AuAHLA), which can hydrolyze different natural penicillins and N-acyl-homoserine lactones (with or without 3-oxo substitution), as well as synthesize them. Kinetic parameters for the hydrolysis of a broad range of substrates have shown that AuAHLA prefers penicillin V, followed by C12-HSL. In addition, AuAHLA inhibits the production of violacein by Chromobacterium violaceum CV026, confirming its potential use as a QQ agent. Noteworthy, AuAHLA is also able to efficiently synthesize penicillin V, besides natural AHLs and phenoxyacetyl-homoserine lactone (POHL), a non-natural analog of AHLs that could be used to block QS receptors and inhibit signal of autoinducers, being the first reported AHL acylase capable of synthesizing AHLs.
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Functional and Phylogenetic Diversity of BSH and PVA Enzymes. Microorganisms 2021; 9:microorganisms9040732. [PMID: 33807488 PMCID: PMC8066178 DOI: 10.3390/microorganisms9040732] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 03/24/2021] [Accepted: 03/29/2021] [Indexed: 12/12/2022] Open
Abstract
Bile salt hydrolase (BSH) and penicillin V acylase (PVA) are related enzymes that are classified as choloylglycine hydrolases (CGH). BSH enzymes have attracted significant interest for their ability to modulate the composition of the bile acid pool, alter bile acid signaling events mediated by the host bile acid receptors FXR and TGR5 and influence cholesterol homeostasis in the host, while PVA enzymes have been widely utilised in an industrial capacity in the production of semi-synthetic antibiotics. The similarities between BSH and PVA enzymes suggest common evolution of these enzymes and shared mechanisms for substrate binding and catalysis. Here, we compare BSH and PVA through analysis of the distribution, phylogeny and biochemistry of these microbial enzymes. The development of new annotation approaches based upon functional enzyme analyses and the potential implications of BSH enzymes for host health are discussed.
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Structural and enzymatic analysis of a dimeric cholylglycine hydrolase like acylase active on N-acyl homoserine lactones. Biochimie 2020; 177:108-116. [PMID: 32835734 DOI: 10.1016/j.biochi.2020.07.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 07/24/2020] [Accepted: 07/26/2020] [Indexed: 01/17/2023]
Abstract
The prevalence of substrate cross-reactivity between AHL acylases and β-lactam acylases provides a glimpse of probable links between quorum sensing and antibiotic resistance in bacteria. Both these enzyme classes belong to the N-terminal nucleophile (Ntn)-hydrolase superfamily. Penicillin V acylases alongside bile salt hydrolases constitute the cholylglycine hydrolase (CGH) group of the Ntn-hydrolase superfamily. Here we report the ability of two acylases, Slac1 and Slac2, from the marine bacterium Shewanella loihica-PV4 to hydrolyze AHLs. Three-dimensional structure of Slac1reveals the conservation of the Ntn hydrolase fold and CGH active site, making it a unique CGH exclusively active on AHLs. Slac1homologs phylogenetically cluster separate from reported CGHs and AHL acylases, thereby representing a functionally distinct sub-class of CGH that might have evolved as an adaptation to the marine environment. We hypothesize that Slac1 could provide the structural framework for understanding this subclass, and further our understanding of the evolutionary link between AHL acylases and β-lactam acylases.
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Penicillin Acylase from Streptomyces lavendulae and Aculeacin A Acylase from Actinoplanes utahensis: Two Versatile Enzymes as Useful Tools for Quorum Quenching Processes. Catalysts 2020. [DOI: 10.3390/catal10070730] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Many Gram-negative bacteria produce N-acyl-homoserine lactones (AHLs), quorum sensing (QS) molecules that can be enzymatically inactivated by quorum quenching (QQ) processes; this approach is considered an emerging antimicrobial alternative. In this study, kinetic parameters of several AHLs hydrolyzed by penicillin acylase from Streptomyces lavendulae (SlPA) and aculeacin A acylase from Actinoplanes utahensis (AuAAC) have been determined. Both enzymes catalyze efficiently the amide bond hydrolysis in AHLs with different acyl chain moieties (with or without 3-oxo modification) and exhibit a clear preference for AHLs with long acyl chains (C12-HSL > C14-HSL > C10-HSL > C8-HSL for SlPA, whereas C14-HSL > C12-HSL > C10-HSL > C8-HSL for AuAAC). Involvement of SlPA and AuAAC in QQ processes was demonstrated by Chromobacterium violaceum CV026-based bioassays and inhibition of biofilm formation by Pseudomonas aeruginosa, a process controlled by QS molecules, suggesting the application of these multifunctional enzymes as quorum quenching agents, this being the first time that quorum quenching activity was shown by an aculeacin A acylase. In addition, a phylogenetic study suggests that SlPA and AuAAC could be part of a new family of actinomycete acylases, with a preference for substrates with long aliphatic acyl chains, and likely involved in QQ processes.
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Zhang C, You S, Zhang J, Qi W, Su R, He Z. An effective in-situ method for laccase immobilization: Excellent activity, effective antibiotic removal rate and low potential ecological risk for degradation products. BIORESOURCE TECHNOLOGY 2020; 308:123271. [PMID: 32247949 DOI: 10.1016/j.biortech.2020.123271] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 03/26/2020] [Accepted: 03/27/2020] [Indexed: 06/11/2023]
Abstract
In this study, we used a simple in-situ biomineralization method to immobilize Bacillus subtilis (B. subtilis)-derived laccase into the copper-Trimesic acid framework (Cu-BTC), and the synthesized Laccase@Cu-BTC particles were used to degrade tetracycline and ampicillin. Compared with free laccase, the Laccase@Cu-BTC showed 16.5-fold of activity recovery, higher thermo-tolerant performance, more excellent acid-proof ability and reusability. Without any mediators, Laccase@Cu-BTC displayed high degradation efficiency (nearly 100%) for tetracycline and ampicillin in some actual water. The degradation mechanism and proposed degradation pathways of tetracycline and ampicillin were discussed technically. Besides, bacteriostatic assay and survival test of Escherichia coli (E. coli) and B. subtilis confirmed the loss of antibiotic activity for tetracycline and ampicillin, as well as the low ecotoxicity of the degradation products. Our research demonstrates that Laccase@Cu-BTC has excellent performance in the effective removal of antibiotics and the detoxification of degradation products, which make it a promising candidate for environmental recovery.
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Affiliation(s)
- Chengyu Zhang
- Chemical Engineering Research Center, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China
| | - Shengping You
- Chemical Engineering Research Center, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China; Tianjin Key Laboratory of Membrane Science and Desalination Technology, Tianjin University, Tianjin 300072, PR China
| | - Jiaxing Zhang
- Chemical Engineering Research Center, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China
| | - Wei Qi
- Chemical Engineering Research Center, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China; State Key Laboratory of Chemical Engineering, Tianjin University, Tianjin 300072, PR China; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, PR China; Tianjin Key Laboratory of Membrane Science and Desalination Technology, Tianjin University, Tianjin 300072, PR China.
| | - Rongxin Su
- Chemical Engineering Research Center, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China; State Key Laboratory of Chemical Engineering, Tianjin University, Tianjin 300072, PR China; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, PR China; Tianjin Key Laboratory of Membrane Science and Desalination Technology, Tianjin University, Tianjin 300072, PR China
| | - Zhimin He
- Chemical Engineering Research Center, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China; State Key Laboratory of Chemical Engineering, Tianjin University, Tianjin 300072, PR China
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Grossi CEM, Fantino E, Serral F, Zawoznik MS, Fernandez Do Porto DA, Ulloa RM. Methylobacterium sp. 2A Is a Plant Growth-Promoting Rhizobacteria That Has the Potential to Improve Potato Crop Yield Under Adverse Conditions. FRONTIERS IN PLANT SCIENCE 2020; 11:71. [PMID: 32127795 PMCID: PMC7038796 DOI: 10.3389/fpls.2020.00071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Accepted: 01/17/2020] [Indexed: 05/11/2023]
Abstract
A Gram-negative pink-pigmented bacillus (named 2A) was isolated from Solanum tuberosum L. cv. Desirée plants that were strikingly more developed, presented increased root hair density, and higher biomass than other potato lines of the same age. The 16S ribosomal DNA sequence, used for comparative gene sequence analysis, indicated that strain 2A belongs to the genus Methylobacterium. Nucleotide identity between Methylobacterium sp. 2A sequenced genome and the rest of the species that belong to the genus suggested that this species has not been described so far. In vitro, potato plants inoculated with Methylobacterium sp. 2A had a better performance when grown under 50 mM NaCl or when infected with Phytophthora infestans. We inoculated Methylobacterium sp. 2A in Arabidopsis thaliana roots and exposed these plants to salt stress (75 mM NaCl). Methylobacterium sp. 2A-inoculated plants, grown in control or salt stress conditions, displayed a higher density of lateral roots (p < 0.05) compared to noninoculated plants. Moreover, under salt stress, they presented a higher number of leaves and larger rosette diameter. In dual confrontation assays, Methylobacterium sp. 2A displayed biocontrol activity against P. infestans, Botrytis cinerea, and Fusarium graminearum, but not against Rhizoctonia solani, and Pythium dissotocum. In addition, we observed that Methylobacterium sp. 2A diminished the size of necrotic lesions and reduced chlorosis when greenhouse potato plants were infected with P. infestans. Methylobacterium sp. 2A produces indole acetic acid, solubilizes mineral phosphate and is able to grow in a N2 free medium. Whole-genome sequencing revealed metabolic pathways associated with its plant growth promoter capacity. Our results suggest that Methylobacterium sp. 2A is a plant growth-promoting rhizobacteria (PGPR) that can alleviate salt stress, and restricts P. infestans infection in potato plants, emerging as a potential strategy to improve crop management.
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Affiliation(s)
- Cecilia Eugenia María Grossi
- Laboratorio de Transducción de Señales en Plantas, Instituto de Investigaciones en Ingeniería Genética y Biología Molecular (INGEBI), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
| | - Elisa Fantino
- Laboratorio de Transducción de Señales en Plantas, Instituto de Investigaciones en Ingeniería Genética y Biología Molecular (INGEBI), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
| | - Federico Serral
- Plataforma de Bioinformática Argentina, Instituto de Cálculo, Ciudad Universitaria, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires (UBA), Ciudad Autónoma de Buenos Aires, Argentina
| | - Myriam Sara Zawoznik
- Cátedra de Química Biológica Vegetal, Departamento de Química Biológica, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires (UBA), Ciudad Autónoma de Buenos Aires, Argentina
| | - Darío Augusto Fernandez Do Porto
- Plataforma de Bioinformática Argentina, Instituto de Cálculo, Ciudad Universitaria, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires (UBA), Ciudad Autónoma de Buenos Aires, Argentina
| | - Rita María Ulloa
- Laboratorio de Transducción de Señales en Plantas, Instituto de Investigaciones en Ingeniería Genética y Biología Molecular (INGEBI), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
- Departamento de Química Biológica, Universidad de Buenos Aires (UBA), Ciudad Autónoma de Buenos Aires, Argentina
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Gupta K, Daroch P, Harjai K, Chhibber S. Parallels among natural and synthetically modified quorum-quenching strategies as convoy to future therapy. Microbiology (Reading) 2019; 165:1265-1281. [DOI: 10.1099/mic.0.000826] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Affiliation(s)
- Kshitiz Gupta
- Department of Microbiology, Panjab University, Chandigarh, India
| | - Priya Daroch
- Department of Microbiology, Panjab University, Chandigarh, India
| | - Kusum Harjai
- Department of Microbiology, Panjab University, Chandigarh, India
| | - Sanjay Chhibber
- Department of Microbiology, Panjab University, Chandigarh, India
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12
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Fang CW, Tsai LC, Fu YS, Cheng TY, Wu PC. Gel-based Microemulsion Design and Evaluation for Topical Application of Rivastigmine. Curr Pharm Biotechnol 2019; 21:298-304. [PMID: 31729297 DOI: 10.2174/1389201020666191113144636] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 07/04/2019] [Accepted: 10/24/2019] [Indexed: 11/22/2022]
Abstract
OBJECTIVE The aim of the present study was to design nanocarriers for the topical application of rivastigmine. METHODS The effect of cosurfactants, hydrophilic gel and loading amount on the permeability of rivastigmine through rat skin was evaluated. Skin irritation tests and stability tests were performed to evaluate the utility of tested formulations. RESULTS The results showed that the microemulsion formation and characteristics of drug-loaded formulations were related to many parameters of the components. When using microemulsion systems as a vehicle, the permeation rate remarkably increased about 13.2~24.3-fold and the lag time was significantly shortened from 24 h to 4.7 h. Formulations containing a cosurfactant of Diethylene Glycol Monobutyl Ether (DEGBE) showed higher enhancement effect, while increasing the loading dose from 0.5% to 5% further increased the flux about 2.1-fold and shortened the lag time. CONCLUSION The drug-loaded experimental formulation did not cause skin irritation and had good stability at 20ºC and 40ºC storage for at least 3 months. The result showed that gel-based microemulsion formulation could be a promising approach for topical administration.
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Affiliation(s)
- Chih-Wen Fang
- Division of Pharmacy, Zuoying Branch of Kaohsiung Armed Forces General Hospital, 553 Junxiao Road, Kaohsiung City 813, Taiwan, China
| | - Ling-Chun Tsai
- School of Pharmacy, Kaohsiung Medical University, 100 Shih-Chuan 1st Road, Kaohsiung City 807, Taiwan, China
| | - Yaw-Syan Fu
- Department of Biomedical Science and Environmental Biology, Kaohsiung Medical University, 100 Shih-Chuan 1st Road, Kaohsiung City 807, Taiwan, China
| | - Ting-Yu Cheng
- School of Pharmacy, Kaohsiung Medical University, 100 Shih-Chuan 1st Road, Kaohsiung City 807, Taiwan, China
| | - Pao-Chu Wu
- School of Pharmacy, Kaohsiung Medical University, 100 Shih-Chuan 1st Road, Kaohsiung City 807, Taiwan, China.,Department of Medical Research, Kaohsiung Medical University Hospital, 100 Shih-Chuan 1st Road, Kaohsiung City 807, Taiwan, China
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13
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Cobos-Puc L, Rodríguez-Herrera R, Cano-Cabrera JC, Aguayo-Morales H, Silva-Belmares SY, Gallegos ACF, Hernández JLM. Classical and New Pharmaceutical Uses of Bacterial Penicillin G Acylase. Curr Pharm Biotechnol 2019; 21:287-297. [PMID: 31713475 DOI: 10.2174/1389201020666191111151642] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 10/28/2019] [Accepted: 10/30/2019] [Indexed: 12/16/2022]
Abstract
BACKGROUND β-lactam antibiotics are the most used worldwide for the treatment of bacterial infections. The consumption of these classes of drugs is high, and it is increasing around the world. To date, the best way to produce them is using penicillin G Acylase (PGA) as a biocatalyst. OBJECTIVE This manuscript offers an overview of the most recent advances in the current tools to improve the activity of the PGA and its pharmaceutical application. RESULTS Several microorganisms produce PGA, but some bacterial strains represent the primary source of this enzyme. The activity of bacterial PGA depends on its adequate expression and carbon or nitrogen source, as well as a specific pH or temperature depending on the nature of the PGA. Additionally, the PGA activity can be enhanced by immobilizing it to a solid support to recycle it for a prolonged time. Likewise, PGAs more stable and with higher activity are obtained from bacterial hosts genetically modified. CONCLUSION PGA is used to produce b-lactam antibiotics. However, this enzyme has pharmaceutical potential to be used to obtain critical molecules for the synthesis of anti-tumor, antiplatelet, antiemetic, antidepressive, anti-retroviral, antioxidant, and antimutagenic drugs.
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Affiliation(s)
- Luis Cobos-Puc
- Department of Biotechnology, Faculty of Chemistry, Autonomous University of Coahuila, Saltillo, Coahuila, Mexico
| | - Raúl Rodríguez-Herrera
- Department of Food Research, Faculty of Chemistry, Autonomous University of Coahuila, Saltillo, Coahuila, Mexico
| | - Juan C Cano-Cabrera
- Department of Biotechnology, Faculty of Chemistry, Autonomous University of Coahuila, Saltillo, Coahuila, Mexico
| | - Hilda Aguayo-Morales
- Department of Biotechnology, Faculty of Chemistry, Autonomous University of Coahuila, Saltillo, Coahuila, Mexico
| | - Sonia Y Silva-Belmares
- Department of Food Research, Faculty of Chemistry, Autonomous University of Coahuila, Saltillo, Coahuila, Mexico
| | - Adriana C F Gallegos
- Department of Food Research, Faculty of Chemistry, Autonomous University of Coahuila, Saltillo, Coahuila, Mexico
| | - José L M Hernández
- Department of Food Research, Faculty of Chemistry, Autonomous University of Coahuila, Saltillo, Coahuila, Mexico
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14
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Liu J, Eng CY, Ho JS, Chong TH, Wang L, Zhang P, Zhou Y. Quorum quenching in anaerobic membrane bioreactor for fouling control. WATER RESEARCH 2019; 156:159-167. [PMID: 30913419 DOI: 10.1016/j.watres.2019.03.029] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 03/14/2019] [Accepted: 03/15/2019] [Indexed: 06/09/2023]
Abstract
Quorum quenching (QQ) is an effective method to control membrane biofouling in aerobic membrane bioreactors (AeMBRs). However, it is not clear if QQ is feasible in an anaerobic membrane bioreactor (AnMBR). In this study, Microbacterium. sp that has QQ capability was embedded in alginate beads, known as QQ beads (QQB), and applied in a lab-scale AnMBR to investigate their potential in fouling control. With the addition of QQB, the operating period of AnMBR-QQB reactor was prolonged by about 8-10 times at constant flux operation before reaching the pre-set maximum transmembrane pressure (TMP). The concentration of Acyl-homoserine lactones (AHLs) in the bulk liquid was significantly higher during the 'TMP jump' period compared to QQB and control phases, while AHLs in the membrane foulants were remarkably lower in QQB phase compared to control phase. Furthermore, a much lower level of soluble microbial production (SMP) was observed in QQB phases. Extracellular polymeric substance (EPS), protein in particular, was reduced by 39.73-80.58% in the cake layer of the membrane from QQB phases. Significant changes of organic functional groups were observed in cake layer from QQB membrane as compared with that from control membrane. At the end of operation, bio-polymer (BP), building blocks (BB) and low molecular weight (LMW) organic matters increased in the foulant from control phases but such increase was not observed in QQB phase. After long-term operation, revival of QQB is required due to the declined activity for AHLs degradation.
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Affiliation(s)
- Jianbo Liu
- Advanced Environmental Biotechnology Centre, Nanyang Environment & Water Research Institute, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore; College of Environmental Science and Engineering, Hunan University, Changsha, 410082, China
| | - Chin Yee Eng
- Advanced Environmental Biotechnology Centre, Nanyang Environment & Water Research Institute, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Jia Shin Ho
- Singapore Membrane Technology Centre, Nanyang Environment & Water Research Institute, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore; School of Civil and Environmental Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - Tzyy Haur Chong
- Singapore Membrane Technology Centre, Nanyang Environment & Water Research Institute, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore; School of Civil and Environmental Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - Li Wang
- Advanced Environmental Biotechnology Centre, Nanyang Environment & Water Research Institute, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Panyue Zhang
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, China
| | - Yan Zhou
- Advanced Environmental Biotechnology Centre, Nanyang Environment & Water Research Institute, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore; School of Civil and Environmental Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
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15
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Gualpa J, Lopez G, Nievas S, Coniglio A, Halliday N, Cámara M, Cassán F. Azospirillum brasilense Az39, a model rhizobacterium with AHL quorum-quenching capacity. J Appl Microbiol 2019; 126:1850-1860. [PMID: 30924989 DOI: 10.1111/jam.14269] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 03/06/2019] [Accepted: 03/24/2019] [Indexed: 12/20/2022]
Abstract
AIMS The aim of this research was to analyse the quorum-sensing (QS) and quorum-quenching (QQ) mechanisms based on N-acyl-l-homoserine lactones (AHLs) in Azospirillum brasilense Az39, a strain with remarkable capacity to benefit a wide range of crops under agronomic conditions. METHODS AND RESULTS We performed an in silico and in vitro analysis of the quorum mechanisms in A. brasilense Az39. The results obtained in vitro using the reporter strains Chromobacterium violaceum and Agrobacterium tumefaciens and liquid chromatography coupled with mass-mass spectrometry analysis showed that although Az39 does not produce AHL molecules, it is capable of degrading them by at least two hypothetical enzymes identified by bioinformatics approach, associated with the bacterial cell. In Az39 cultures supplemented with 500 nmol l-1 of the C3 unsubstituted AHLs (C4, C6, C8, C10, C12, C14), AHL levels were lower than in noninoculated LB media controls. Similar results were observed upon the addition of AHLs with hydroxy (OH-) and keto (oxo-) substitutions in C3. These results not only demonstrate the ability of Az39 to degrade AHLs. They also show the wide spectrum of molecules that can be degraded by this bacterium. CONCLUSIONS Although A. brasilense Az39 is a silent bacterium unable to produce AHL signals, it is able to interrupt the communications between other bacteria and/or plants by a QQ activity. SIGNIFICANCE AND IMPACT OF THE STUDY This is the first report confirming by unequivocal methodology the ability of A. brasilense, one of the most agriculturally used benefic bacteria around the world, to degrade AHLs by a QQ mechanism.
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Affiliation(s)
- J Gualpa
- Laboratorio de Fisiología Vegetal y de la Interacción Planta-Microorganismo, Universidad Nacional de Río Cuarto, Córdoba, Argentina
| | - G Lopez
- Laboratorio de Fisiología Vegetal y de la Interacción Planta-Microorganismo, Universidad Nacional de Río Cuarto, Córdoba, Argentina
| | - S Nievas
- Laboratorio de Fisiología Vegetal y de la Interacción Planta-Microorganismo, Universidad Nacional de Río Cuarto, Córdoba, Argentina
| | - A Coniglio
- Laboratorio de Fisiología Vegetal y de la Interacción Planta-Microorganismo, Universidad Nacional de Río Cuarto, Córdoba, Argentina
| | - N Halliday
- Centre for Biomolecular Sciences, School of Life Sciences, University of Nottingham, Nottingham, UK
| | - M Cámara
- Centre for Biomolecular Sciences, School of Life Sciences, University of Nottingham, Nottingham, UK
| | - F Cassán
- Laboratorio de Fisiología Vegetal y de la Interacción Planta-Microorganismo, Universidad Nacional de Río Cuarto, Córdoba, Argentina
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16
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Jiang Q, Chen J, Yang C, Yin Y, Yao K. Quorum Sensing: A Prospective Therapeutic Target for Bacterial Diseases. BIOMED RESEARCH INTERNATIONAL 2019; 2019:2015978. [PMID: 31080810 PMCID: PMC6475571 DOI: 10.1155/2019/2015978] [Citation(s) in RCA: 144] [Impact Index Per Article: 28.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Accepted: 03/20/2019] [Indexed: 01/07/2023]
Abstract
Bacterial quorum sensing (QS) is a cell-to-cell communication in which specific signals are activated to coordinate pathogenic behaviors and help bacteria acclimatize to the disadvantages. The QS signals in the bacteria mainly consist of acyl-homoserine lactone, autoinducing peptide, and autoinducer-2. QS signaling activation and biofilm formation lead to the antimicrobial resistance of the pathogens, thus increasing the therapy difficulty of bacterial diseases. Anti-QS agents can abolish the QS signaling and prevent the biofilm formation, therefore reducing bacterial virulence without causing drug-resistant to the pathogens, suggesting that anti-QS agents are potential alternatives for antibiotics. This review focuses on the anti-QS agents and their mediated signals in the pathogens and conveys the potential of QS targeted therapy for bacterial diseases.
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Affiliation(s)
- Qian Jiang
- Laboratory of Animal Nutritional Physiology and Metabolic Process, Institute of Subtropical Agriculture, Chinese Academy of Sciences, China
- University of Chinese Academy of Sciences, Beijing 100043, China
- Department of Animal Science, University of Manitoba, Winnipeg, MB, Canada R3T 2N2
| | - Jiashun Chen
- Laboratory of Animal Nutritional Physiology and Metabolic Process, Institute of Subtropical Agriculture, Chinese Academy of Sciences, China
| | - Chengbo Yang
- Department of Animal Science, University of Manitoba, Winnipeg, MB, Canada R3T 2N2
| | - Yulong Yin
- Laboratory of Animal Nutritional Physiology and Metabolic Process, Institute of Subtropical Agriculture, Chinese Academy of Sciences, China
| | - Kang Yao
- Laboratory of Animal Nutritional Physiology and Metabolic Process, Institute of Subtropical Agriculture, Chinese Academy of Sciences, China
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17
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Reina JC, Torres M, Llamas I. Stenotrophomonas maltophilia AHL-Degrading Strains Isolated from Marine Invertebrate Microbiota Attenuate the Virulence of Pectobacterium carotovorum and Vibrio coralliilyticus. MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2019; 21:276-290. [PMID: 30762152 DOI: 10.1007/s10126-019-09879-w] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 01/21/2019] [Indexed: 06/09/2023]
Abstract
Many Gram-negative aquacultural and agricultural pathogens control virulence factor expression through a quorum-sensing (QS) mechanism involving the production of N-acylhomoserine (AHL) signalling molecules. Thus, the interruption of QS systems by the enzymatic degradation of signalling molecules, known as quorum quenching (QQ), has been proposed as a novel strategy to combat these infections. Given that the symbiotic bacteria of marine invertebrates are considered to be an important source of new bioactive molecules, this study explores the presence of AHL-degrading bacteria among 827 strains previously isolated from the microbiota of anemones and holothurians. Four of these strains (M3-1, M1-14, M3-13 and M9-54-2), belonging to the species Stenotrophomonas maltophilia, were selected on the basis of their ability to degrade a broad range of AHLs, and the enzymes involved in their activity were identified. Strain M9-54-2, which showed the strongest AHL-degrading activity, was selected for further study. High-performance liquid chromatography-mass-spectrometry confirmed that the QQ enzyme is not a lactonase. Strain M9-54-2 degraded AHL accumulation and reduced the production of enzymatic activity in Pectobacterium carotovorum CECT 225T and Vibrio coralliilyticus VibC-Oc-193 in in vitro co-cultivation experiments. The effect of AHL inactivation was confirmed by a reduction in potato tuber maceration and brine shrimp (Artemia salina) mortality caused by P. carotovorum and Vibrio coralliilyticus, respectively. This study strengthens the evidence of marine organisms as an underexplored and promising source of QQ enzymes, useful to prevent infections in aquaculture and agriculture. To our knowledge, this is the first time that anemones and holothurians have been studied for this purpose.
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Affiliation(s)
- José Carlos Reina
- Department of Microbiology, Faculty of Pharmacy, University of Granada, 18071, Granada, Spain
| | - Marta Torres
- Department of Microbiology, Faculty of Pharmacy, University of Granada, 18071, Granada, Spain
- Institute of Biotechnology, Biomedical Research Center (CIBM), University of Granada, 18071, Granada, Spain
- Institute for Integrative Biology of the Cell, CEA, CNRS, University Paris-Sud, University Paris-Saclay, Gif sur Yvette, France
| | - Inmaculada Llamas
- Department of Microbiology, Faculty of Pharmacy, University of Granada, 18071, Granada, Spain.
- Institute of Biotechnology, Biomedical Research Center (CIBM), University of Granada, 18071, Granada, Spain.
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18
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Kusada H, Zhang Y, Tamaki H, Kimura N, Kamagata Y. Novel N-Acyl Homoserine Lactone-Degrading Bacteria Isolated From Penicillin-Contaminated Environments and Their Quorum-Quenching Activities. Front Microbiol 2019; 10:455. [PMID: 30923518 PMCID: PMC6426785 DOI: 10.3389/fmicb.2019.00455] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Accepted: 02/20/2019] [Indexed: 01/28/2023] Open
Abstract
N-Acyl homoserine lactones (AHLs) are signaling molecules used in the quorum sensing (QS) of Gram-negative bacteria. Some bacteria interfere with the QS system using AHL-inactivating enzymes, commonly known as quorum-quenching (QQ) enzymes. We have recently isolated a new QQ bacterium showing high resistance to multiple β-lactam antibiotics, and its QQ enzyme (MacQ) confers β-lactam antibiotic resistance and exhibits QQ activities. This observation suggests the possibility of isolating novel QQ bacteria from β-lactam antibiotic-resistant bacteria. In this direction, we attempted to isolate penicillin G (PENG)-resistant bacteria from penicillin-contaminated river sediments and activated sludge treating penicillin-containing wastewater and characterize their QQ activities. Of 19 PENG-resistant isolates, six isolates showed high QQ activity toward a broad range of AHLs, including AHLs with 3-oxo substituents. Five of the six AHL-degraders showed AHL-acylase activity and hydrolyzed the amide bond of AHLs, whereas the remaining one strain did not show AHL-acylase activity, suggesting that this isolate may likely possess alternative degradation mechanism such as AHL-lactonase activity hydrolyzing the lactone ring of AHLs. The 16S rRNA gene sequence analysis results categorized these six AHL-degrading isolates into at least five genera, namely, Sphingomonas (Alphaproteobacteria), Diaphorobacter (Betaproteobacteria), Acidovorax (Betaproteobacteria), Stenotrophomonas (Gammaproteobacteria), and Mycobacterium (Actinobacteria); of these, Mycobacterium sp. M1 has never been known as QQ bacteria. Moreover, multiple β-lactam antibiotics showed high minimum inhibitory concentrations (MICs) when tested against all of isolates. These results strongly demonstrate that a wide variety of β-lactam antibiotic-resistant bacteria possess QQ activities. Although the genetic and enzymatic elements are yet unclear, this study may infer the functional and evolutionary correlation between β-lactam antibiotic resistance and QQ activities.
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Affiliation(s)
- Hiroyuki Kusada
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan
| | - Yu Zhang
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan.,State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, China
| | - Hideyuki Tamaki
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan.,JST ERATO Nomura Microbial Community Control Project, University of Tsukuba, Tsukuba, Japan
| | - Nobutada Kimura
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan
| | - Yoichi Kamagata
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan
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19
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Wang L, Xu H, Liu Z, Sun T, Yuan C, Yang Y, Guo J, Xie H. Magnetic immobilization of a quorum sensing signal hydrolase, AiiA. Microbiologyopen 2019; 8:e00797. [PMID: 30767416 PMCID: PMC6692522 DOI: 10.1002/mbo3.797] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Revised: 12/17/2018] [Accepted: 12/18/2018] [Indexed: 11/10/2022] Open
Abstract
Magnetic immobilization of quorum sensing (QS) signal hydrolases provides a convenient solution for quenching QS process that is essential for bacterial biofilm formation and antimicrobial resistance. In the present study, a QS signal hydrolase, AiiA, was fused with a magnetic protein, MagR, and expressed in Escherichia coli. Magnetic immobilization of AiiA was achieved on Fe3 O4 -SiO2 iron beads and was confirmed via SDS-PAGE, zeta potential measurement, FTIR spectrometry, and SEM analysis. The magnetic immobilized AiiA exhibited activity in degrading the quorum sensing signal, C6-HSL. This study opens a new avenue to actively immobilize enzymes via magnetic interaction and quench quorum sensing.
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Affiliation(s)
- Lin Wang
- School of Chemistry, Chemical Engineering, and Life Science, Wuhan University of Technology, Wuhan, China
| | - Haixing Xu
- School of Chemistry, Chemical Engineering, and Life Science, Wuhan University of Technology, Wuhan, China
| | - Zewen Liu
- School of Chemistry, Chemical Engineering, and Life Science, Wuhan University of Technology, Wuhan, China
| | - Taolei Sun
- School of Chemistry, Chemical Engineering, and Life Science, Wuhan University of Technology, Wuhan, China
| | - Chengqing Yuan
- School of Energy and Power Engineering, Wuhan University of Technology, Wuhan, China
| | - Ying Yang
- Institute for Science and Technology in Medicine, Keele University, Staffordshire, UK
| | - Junhui Guo
- School of Chemistry, Chemical Engineering, and Life Science, Wuhan University of Technology, Wuhan, China
| | - Hao Xie
- School of Chemistry, Chemical Engineering, and Life Science, Wuhan University of Technology, Wuhan, China
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20
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Ding T, Li T, Li J. Preparation of Coaxial Polylactic Acid-Propyl Gallate Electrospun Fibers and the Effect of Their Coating on Salmon Slices during Chilled Storage. ACS APPLIED MATERIALS & INTERFACES 2019; 11:6463-6474. [PMID: 30668113 DOI: 10.1021/acsami.9b00461] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Pseudomonas fluorescens bacteria can grow well in cold-storage conditions and cause food spoilage. Quorum sensing (QS) is a biological pathway existing in a large number of microorganisms, through which bacteria regulate several of their physiological activities. A number of substances have been identified as quorum sensing inhibitors (QSIs); they can interfere with the QS system and control bacterial spoilage characteristics and production of virulence factors. In our previous study, propyl gallate at sub-minimum inhibitory concentration levels showed a potent anti-QS activity. Thus, in this study, coaxial polylactic acid-propyl gallate electrospun fibers were fabricated and their physicochemical properties were characterized. Salmon slices were coated with these electrospun fibers and the effect of this coating on the salmon slices during chilled storage was evaluated. The results showed that the electrospun fibers had a small diameter and smooth surface with no beads or other defects. The thermal stability, tensile strength, and other properties of the fibers were suitable for refrigerated storage conditions. Without inhibiting the bacterial growth in the salmon slices, the QSI-containing electrospun fibers exerted a significant inhibitory effect on the production of total volatile base nitrogen and trimethylamine. Furthermore, the deterioration of muscle tissue in the salmon slices was significantly delayed during cold storage. Quantitative analysis indicated that the electrospun fibers had a significant inhibitory effect on the bacterial spoilage ability. The results suggested that the electrospun fibers loaded with QSIs might be an effective strategy to control food spoilage and enhance the quality of aquatic food products.
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Affiliation(s)
- Ting Ding
- School of Food Science and Technology , Jiangnan University , Wuxi 214122 , China
| | - Tingting Li
- Key Laboratory of Biotechnology and Bioresources Utilization , Dalian Minzu University, Ministry of Education , Dalian , Liaoning 116600 , China
| | - Jianrong Li
- School of Food Science and Technology , Jiangnan University , Wuxi 214122 , China
- College of Food Science and Technology, Food Safety Key Lab of Liaoning Province, National & Local Joint Engineering Research Center of Storage, Processing and Safety Control Technology for Fresh Agricultural and Aquatic Products , Bohai University , Jinzhou , Liaoning 121013 , China
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21
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Li K, Liu XT, Zhang YF, Liu D, Zhang XY, Ma SM, Ruso JM, Tang Z, Chen ZB, Liu Z. The engineering and immobilization of penicillin G acylase onto thermo-sensitive tri-block copolymer system. POLYM ADVAN TECHNOL 2018. [DOI: 10.1002/pat.4446] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Ke Li
- School of Materials Science and Engineering; Lanzhou University of Technology; Lanzhou China 730050
- State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials; Lanzhou University of Technology; Lanzhou China 730050
| | - Xiao Ting Liu
- School of Materials Science and Engineering; Lanzhou University of Technology; Lanzhou China 730050
- State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials; Lanzhou University of Technology; Lanzhou China 730050
| | - Yun Fei Zhang
- School of Materials Science and Engineering; Lanzhou University of Technology; Lanzhou China 730050
- State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials; Lanzhou University of Technology; Lanzhou China 730050
| | - Donglei Liu
- School of Materials Science and Engineering; Lanzhou University of Technology; Lanzhou China 730050
- State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials; Lanzhou University of Technology; Lanzhou China 730050
| | - Xin Yu Zhang
- School of Materials Science and Engineering; Lanzhou University of Technology; Lanzhou China 730050
- State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials; Lanzhou University of Technology; Lanzhou China 730050
| | - Song Mei Ma
- School of Chemistry and Materials Science; Ludong University; Yantai China 264025
| | - Juan M. Ruso
- Soft Matter and Molecular Biophysics Group, Department of Applied Physics; University of Santiago de Compostela; 15782 Santiago de Compostela Spain
| | - Zhenghua Tang
- Guangzhou Key Laboratory for Surface Chemistry of Energy Materials; New Energy Research Institute, School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre; Guangzhou China 510006
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangdong Provincial Engineering and Technology Research Center for Environmental Risk Prevention and Emergency Disposal, School of Environment and Energy; South China University of Technology, Guangzhou Higher Education Mega Centre; Guangzhou China 510006
| | - Zhen Bin Chen
- School of Materials Science and Engineering; Lanzhou University of Technology; Lanzhou China 730050
- State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials; Lanzhou University of Technology; Lanzhou China 730050
| | - Zhen Liu
- Department of Physics and Engineering; Frostburg State University; MD USA 21532
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22
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Colino CI, Millán CG, Lanao JM. Nanoparticles for Signaling in Biodiagnosis and Treatment of Infectious Diseases. Int J Mol Sci 2018; 19:E1627. [PMID: 29857492 PMCID: PMC6032068 DOI: 10.3390/ijms19061627] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 05/25/2018] [Accepted: 05/26/2018] [Indexed: 01/09/2023] Open
Abstract
Advances in nanoparticle-based systems constitute a promising research area with important implications for the treatment of bacterial infections, especially against multidrug resistant strains and bacterial biofilms. Nanosystems may be useful for the diagnosis and treatment of viral and fungal infections. Commercial diagnostic tests based on nanosystems are currently available. Different methodologies based on nanoparticles (NPs) have been developed to detect specific agents or to distinguish between Gram-positive and Gram-negative microorganisms. Also, biosensors based on nanoparticles have been applied in viral detection to improve available analytical techniques. Several point-of-care (POC) assays have been proposed that can offer results faster, easier and at lower cost than conventional techniques and can even be used in remote regions for viral diagnosis. Nanoparticles functionalized with specific molecules may modulate pharmacokinetic targeting recognition and increase anti-infective efficacy. Quorum sensing is a stimuli-response chemical communication process correlated with population density that bacteria use to regulate biofilm formation. Disabling it is an emerging approach for combating its pathogenicity. Natural or synthetic inhibitors may act as antibiofilm agents and be useful for treating multi-drug resistant bacteria. Nanostructured materials that interfere with signal molecules involved in biofilm growth have been developed for the control of infections associated with biofilm-associated infections.
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Affiliation(s)
- Clara I Colino
- Area of Pharmacy and Pharmaceutical Technology, Department of Pharmaceutical Sciences, University of Salamanca, 37007 Salamanca, Spain.
- The Institute for Biomedical Research of Salamanca, 37007 Salamanca, Spain.
| | - Carmen Gutiérrez Millán
- Area of Pharmacy and Pharmaceutical Technology, Department of Pharmaceutical Sciences, University of Salamanca, 37007 Salamanca, Spain.
- The Institute for Biomedical Research of Salamanca, 37007 Salamanca, Spain.
| | - José M Lanao
- Area of Pharmacy and Pharmaceutical Technology, Department of Pharmaceutical Sciences, University of Salamanca, 37007 Salamanca, Spain.
- The Institute for Biomedical Research of Salamanca, 37007 Salamanca, Spain.
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23
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Soler A, Arregui L, Arroyo M, Mendoza JA, Muras A, Álvarez C, García-Vera C, Marquina D, Santos A, Serrano S. Quorum Sensing versus Quenching Bacterial Isolates Obtained from MBR Plants Treating Leachates from Municipal Solid Waste. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2018; 15:E1019. [PMID: 29783658 PMCID: PMC5982058 DOI: 10.3390/ijerph15051019] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Revised: 05/12/2018] [Accepted: 05/15/2018] [Indexed: 12/12/2022]
Abstract
Quorum sensing (QS) is a mechanism dependent on bacterial density. This coordinated process is mediated by the synthesis and the secretion of signal molecules, called autoinducers (AIs). N-acyl-homoserine lactones (AHLs) are the most common AIs that are used by Gram-negative bacteria and are involved in biofilm formation. Quorum Quenching (QQ) is the interference of QS by producing hydrolyzing enzymes, among other strategies. The main objective of the present study was to identify QS and QQ strains from MBR wastewater treatment plants. A total of 99 strains were isolated from two Spanish plants that were intended to treat leachate from municipal solid waste. Five AHL producers were detected using AHL biosensor strains (Chromobacterium violaceum CV026 and Agrobacterium tumefaciens NT1). Fifteen strains of seventy-one Gram-positive were capable of eliminating or reducing at least one AHL activity. The analysis of 16S rRNA gene sequence showed the importance of the Pseudomonas genus in the production of biofilms and the relevance of the genus Bacillus in the disruption of the QS mechanism, in which the potential activity of lactonase or acylase enzymes was investigated with the aim to contribute to solve biofouling problems and to increase the useful lifespan of membranes.
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Affiliation(s)
- Albert Soler
- Department of Genetics, Physiology and Microbiology, Complutense University of Madrid, 28040 Madrid, Spain.
| | - Lucía Arregui
- Department of Genetics, Physiology and Microbiology, Complutense University of Madrid, 28040 Madrid, Spain.
| | - Miguel Arroyo
- Department of Biochemistry and Molecular Biology I, Complutense University of Madrid, 28040 Madrid, Spain.
| | - José Antonio Mendoza
- Department of Chemical and Nuclear Engineering, Polytechnic University of Valencia, 46022 Valencia, Spain.
| | - Andrea Muras
- Department of Microbiology and Parasitology-CIBUS, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain.
| | | | | | - Domingo Marquina
- Department of Genetics, Physiology and Microbiology, Complutense University of Madrid, 28040 Madrid, Spain.
| | - Antonio Santos
- Department of Genetics, Physiology and Microbiology, Complutense University of Madrid, 28040 Madrid, Spain.
| | - Susana Serrano
- Department of Genetics, Physiology and Microbiology, Complutense University of Madrid, 28040 Madrid, Spain.
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24
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Muras A, López-Pérez M, Mayer C, Parga A, Amaro-Blanco J, Otero A. High Prevalence of Quorum-Sensing and Quorum-Quenching Activity among Cultivable Bacteria and Metagenomic Sequences in the Mediterranean Sea. Genes (Basel) 2018; 9:E100. [PMID: 29462892 PMCID: PMC5852596 DOI: 10.3390/genes9020100] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 02/08/2018] [Accepted: 02/12/2018] [Indexed: 11/22/2022] Open
Abstract
There is increasing evidence being accumulated regarding the importance of N-acyl homoserine lactones (AHL)-mediated quorum-sensing (QS) and quorum-quenching (QQ) processes in the marine environment, but in most cases, data has been obtained from specific microhabitats, and subsequently little is known regarding these activities in free-living marine bacteria. The QS and QQ activities among 605 bacterial isolates obtained at 90 and 2000 m depths in the Mediterranean Sea were analyzed. Additionally, putative QS and QQ sequences were searched in metagenomic data obtained at different depths (15-2000 m) at the same sampling site. The number of AHL producers was higher in the 90 m sample (37.66%) than in the 2000 m sample (4.01%). However, the presence of QQ enzymatic activity was 1.63-fold higher in the 2000 m sample. The analysis of putative QQ enzymes in the metagenomes supports the relevance of QQ processes in the deepest samples, found in cultivable bacteria. Despite the unavoidable biases in the cultivation methods and biosensor assays and the possible promiscuous activity of the QQ enzymes retrieved in the metagenomic analysis, the results indicate that AHL-related QS and QQ processes could be common activity in the marine environment.
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Affiliation(s)
- Andrea Muras
- Departamento de Microbioloxía e Parasitoloxía, Facultade de Bioloxía-CIBUS, Universidade de Santiago de Compostela, Santiago de Compostela 15782, Spain.
| | - Mario López-Pérez
- Evolutionary Genomics Group, División de Microbiología, Universidad Miguel Hernández, San Juan de Alicante 03202, Spain.
| | - Celia Mayer
- Departamento de Microbioloxía e Parasitoloxía, Facultade de Bioloxía-CIBUS, Universidade de Santiago de Compostela, Santiago de Compostela 15782, Spain.
| | - Ana Parga
- Departamento de Microbioloxía e Parasitoloxía, Facultade de Bioloxía-CIBUS, Universidade de Santiago de Compostela, Santiago de Compostela 15782, Spain.
| | - Jaime Amaro-Blanco
- Departamento de Microbioloxía e Parasitoloxía, Facultade de Bioloxía-CIBUS, Universidade de Santiago de Compostela, Santiago de Compostela 15782, Spain.
| | - Ana Otero
- Departamento de Microbioloxía e Parasitoloxía, Facultade de Bioloxía-CIBUS, Universidade de Santiago de Compostela, Santiago de Compostela 15782, Spain.
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Bifunctional quorum-quenching and antibiotic-acylase MacQ forms a 170-kDa capsule-shaped molecule containing spacer polypeptides. Sci Rep 2017; 7:8946. [PMID: 28827579 PMCID: PMC5566955 DOI: 10.1038/s41598-017-09399-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Accepted: 07/26/2017] [Indexed: 12/18/2022] Open
Abstract
Understanding the molecular mechanisms of bacterial antibiotic resistance will help prepare against further emergence of multi-drug resistant strains. MacQ is an enzyme responsible for the multi-drug resistance of Acidovorax sp. strain MR-S7. MacQ has acylase activity against both N-acylhomoserine lactones (AHLs), a class of signalling compounds involved in quorum sensing, and β-lactam antibiotics. Thus, MacQ is crucial as a quencher of quorum sensing as well as in conferring antibiotic resistance in Acidovorax. Here, we report the X-ray structures of MacQ in ligand-free and reaction product complexes. MacQ forms a 170-kDa capsule-shaped molecule via face-to-face interaction with two heterodimers consisting of an α-chain and a β-chain, generated by the self-cleaving activity of a precursor polypeptide. The electron density of the spacer polypeptide in the hollow of the molecule revealed the close orientation of the peptide-bond atoms of Val20SP-Gly21SP to the active-site, implying a role of the residues in substrate binding. In mutational analyses, uncleaved MacQ retained degradation activity against both AHLs and penicillin G. These results provide novel insights into the mechanism of self-cleaving maturation and enzymatic function of N-terminal nucleophile hydrolases.
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Utari PD, Vogel J, Quax WJ. Deciphering Physiological Functions of AHL Quorum Quenching Acylases. Front Microbiol 2017; 8:1123. [PMID: 28674525 PMCID: PMC5474475 DOI: 10.3389/fmicb.2017.01123] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Accepted: 06/01/2017] [Indexed: 11/13/2022] Open
Abstract
N-Acylhomoserine lactone (AHL)-acylase (also known as amidase or amidohydrolase) is a class of enzyme that belongs to the Ntn-hydrolase superfamily. As the name implies, AHL-acylases are capable of hydrolysing AHLs, the most studied signaling molecules for quorum sensing in Gram-negative bacteria. Enzymatic degradation of AHLs can be beneficial in attenuating bacterial virulence, which can be exploited as a novel approach to fight infection of human pathogens, phytopathogens or aquaculture-related contaminations. Numerous acylases from both prokaryotic and eukaryotic sources have been characterized and tested for the interference of quorum sensing-regulated functions. The existence of AHL-acylases in a multitude of organisms from various ecological niches, raises the question of what the physiological roles of AHL-acylases actually are. In this review, we attempt to bring together recent studies to extend our understanding of the biological functions of these enzymes in nature.
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Affiliation(s)
- Putri D Utari
- Chemical and Pharmaceutical Biology Department, University of GroningenGroningen, Netherlands
| | - Jan Vogel
- Chemical and Pharmaceutical Biology Department, University of GroningenGroningen, Netherlands
| | - Wim J Quax
- Chemical and Pharmaceutical Biology Department, University of GroningenGroningen, Netherlands
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A Novel Quorum-Quenching N-Acylhomoserine Lactone Acylase from Acidovorax sp. Strain MR-S7 Mediates Antibiotic Resistance. Appl Environ Microbiol 2017; 83:AEM.00080-17. [PMID: 28455333 PMCID: PMC5478981 DOI: 10.1128/aem.00080-17] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Accepted: 04/03/2017] [Indexed: 11/22/2022] Open
Abstract
N-Acylhomoserine lactone acylase (AHL acylase) is a well-known enzyme responsible for disrupting cell-cell communication (quorum sensing) in bacteria. Here, we isolated and characterized a novel and unique AHL acylase (designated MacQ) from a multidrug-resistant bacterium, Acidovorax sp. strain MR-S7. The purified MacQ protein heterologously expressed in Escherichia coli degraded a wide variety of AHLs, ranging from C6 to C14 side chains with or without 3-oxo substitutions. We also observed that AHL-mediated virulence factor production in a plant pathogen, Pectobacterium carotovorum, was dramatically attenuated by coculture with MacQ-overexpressing Escherichia coli, whereas E. coli with an empty vector was unable to quench the pathogenicity, which strongly indicates that MacQ can act in vivo as a quorum-quenching enzyme and interfere with the quorum-sensing system in the pathogen. In addition, this enzyme was found to be capable of degrading a wide spectrum of β-lactams (penicillin G, ampicillin, amoxicillin, carbenicillin, cephalexin, and cefadroxil) by deacylation, clearly indicating that MacQ is a bifunctional enzyme that confers both quorum quenching and antibiotic resistance on strain MR-S7. MacQ has relatively low amino acid sequence identity to any of the known acylases (<39%) and has among the broadest substrate range. Our findings provide the possibility that AHL acylase genes can be an alternative source of antibiotic resistance genes posing a threat to human health if they migrate and transfer to pathogenic bacteria. IMPORTANCEN-Acylhomoserine lactones (AHLs) are well-known signal molecules for bacterial cell-cell communication (quorum sensing), and AHL acylase, which is able to degrade AHLs, has been recognized as a major target for quorum-sensing interference (quorum quenching) in pathogens. In this work, we succeeded in isolating a novel AHL acylase (MacQ) from a multidrug-resistant bacterium and demonstrated that the MacQ enzyme could confer multidrug resistance as well as quorum quenching on the host organism. Indeed, the purified MacQ protein was found to be bifunctional and capable of degrading not only various AHL derivatives but also multiple β-lactam antibiotics by deacylation activities. Although quorum quenching and antibiotic resistance have been recognized to be distinct biological functions, our findings clearly link the two functions by discovering the novel bifunctional enzyme and further providing the possibility that a hitherto-overlooked antibiotic resistance mechanism mediated by the quorum-quenching enzyme may exist in natural environments and perhaps in clinical settings.
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Uzelac G, Patel HK, Devescovi G, Licastro D, Venturi V. Quorum sensing and RsaM regulons of the rice pathogen Pseudomonas fuscovaginae. MICROBIOLOGY-SGM 2017; 163:765-777. [PMID: 28530166 DOI: 10.1099/mic.0.000454] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Pseudomonas fuscovaginae (Pfv) is an emerging plant pathogen causing sheath brown rot in rice, as well as diseases in other gramineae food crops including maize, sorghum and wheat. Pfv possesses two conserved N-acyl homoserine lactone (AHL) quorum sensing (QS) systems called PfvI/R and PfsI/R, which are repressed by RsaL and RsaM, respectively. The two systems are not hierarchically organized and are involved in plant virulence. In this study the AHL QS PfsI/R, PfvI/R and RsaM regulons were determined by transcriptomic analysis. The PfsI/R system regulates 98 genes, whereas 26 genes are regulated by the PfvI/R AHL QS system; only two genes are regulated by both systems. RsaM, on the other hand, regulates over 400 genes: 206 are negatively regulated and 260 are positively regulated. More than half of the genes controlled by the PfsI/R system and 65 % by the PfvI/R system are also part of the RsaM regulon; this is due to RsaM being involved in the regulation of both systems. It is concluded that the two QS systems regulate a unique set of genes and that RsaM is a global regulator mediating the expression of different genes through the two QS systems as well as genes independently of QS.
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Affiliation(s)
- Gordana Uzelac
- International Centre for Genetic Engineering and Biotechnology, Trieste, Italy
| | - Hitendra Kumar Patel
- International Centre for Genetic Engineering and Biotechnology, Trieste, Italy.,Present address: CSIR-Centre for Cellular and Molecular Biology, Uppal Road, Hyderabad, India
| | - Giulia Devescovi
- International Centre for Genetic Engineering and Biotechnology, Trieste, Italy
| | | | - Vittorio Venturi
- International Centre for Genetic Engineering and Biotechnology, Trieste, Italy
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Nasuno E, Suzuki T, Suzuki R, Okano C, Kurokura T, Iimura KI, Kato N. Novel quorum quenching enzymes identified from draft genome of Roseomonas sp. TAS13. GENOMICS DATA 2017; 12:22-23. [PMID: 28275548 PMCID: PMC5328757 DOI: 10.1016/j.gdata.2017.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Revised: 01/28/2017] [Accepted: 02/02/2017] [Indexed: 11/01/2022]
Abstract
Roseomonas sp. strain TAS13 isolated from an activated sludge sample degrades N-acylhomoserine lactones (AHLs) that are widely utilized as a signal in bacterial quorum sensing systems. The draft genome of Roseomonas sp. TAS13 contains 816 contigs (total 5,078,941 bp) which carries 4760 protein-coding genes and 52 tRNA genes (DDBJ/EMBL/GenBank accession numbers BDLP01000001 through BDLP01000816).
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Affiliation(s)
- Eri Nasuno
- Department of Material and Environmental Chemistry, Graduate School of Engineering, Utsunomiya University, 7-1-2 Yoto, Utsunomiya, Tochigi 321-8585, Japan
| | - Tomohiro Suzuki
- Center for Bioscience Research and Education, Utsunomiya University, 350 Mine-machi, Utsunomiya, Tochigi 321-8505, Japan
| | - Ryoko Suzuki
- Department of Material and Environmental Chemistry, Graduate School of Engineering, Utsunomiya University, 7-1-2 Yoto, Utsunomiya, Tochigi 321-8585, Japan
| | - Chigusa Okano
- Creative Department for Innovation, Collaboration Center for Research and Development, Utsunomiya University, 7-1-2 Yoto, Utsunomiya, Tochigi 321-8585, Japan
| | - Takeshi Kurokura
- Faculty of Agriculture, Utsunomiya University, 350 Mine-machi, Utsunomiya, Tochigi 321-8505, Japan
| | - Ken-Ichi Iimura
- Department of Material and Environmental Chemistry, Graduate School of Engineering, Utsunomiya University, 7-1-2 Yoto, Utsunomiya, Tochigi 321-8585, Japan
| | - Norihiro Kato
- Department of Material and Environmental Chemistry, Graduate School of Engineering, Utsunomiya University, 7-1-2 Yoto, Utsunomiya, Tochigi 321-8585, Japan
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Sunder AV, Utari PD, Ramasamy S, van Merkerk R, Quax W, Pundle A. Penicillin V acylases from gram-negative bacteria degrade N-acylhomoserine lactones and attenuate virulence in Pseudomonas aeruginosa. Appl Microbiol Biotechnol 2016; 101:2383-2395. [DOI: 10.1007/s00253-016-8031-5] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Revised: 11/21/2016] [Accepted: 11/23/2016] [Indexed: 11/25/2022]
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31
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Zhang W, Li C. Exploiting Quorum Sensing Interfering Strategies in Gram-Negative Bacteria for the Enhancement of Environmental Applications. Front Microbiol 2016; 6:1535. [PMID: 26779175 PMCID: PMC4705238 DOI: 10.3389/fmicb.2015.01535] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Accepted: 12/21/2015] [Indexed: 12/12/2022] Open
Abstract
Quorum sensing (QS) is a widespread intercellular form of communication to coordinate physiological processes and cooperative activities of bacteria at the population level, and it depends on the production, secretion, and detection of small diffusible autoinducers, such as acyl-homoserine lactones (AHLs), auto-inducing oligo-peptides (AIPs) and autoinducer 2. In this review, the function of QS autoinducers of gram-negative bacteria in different aspects of wastewater treatment systems is examined. Based on research primarily performed over the past 10 years, QS involvement in the formation of biofilm and aerobic granules and changes of the microbial community and degradation/transformation pathways is discussed. In particular, the QS pathway in the role of bacterial infections and disease prevention in aquaculture is addressed. Interference of QS autoinducer-regulated pathways is considered potential treatment for a variety of environmentally related problems. This review is expected to serve as a stepping stone for further study and development strategies based on the mediation of QS-regulated pathways to enhance applications in both wastewater treatment systems and aquaculture.
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Affiliation(s)
- Weiwei Zhang
- Department of Aquaculture, School of Marine Sciences, Ningbo University Ningbo, China
| | - Chenghua Li
- Department of Aquaculture, School of Marine Sciences, Ningbo University Ningbo, China
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32
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Avinash VS, Panigrahi P, Chand D, Pundle A, Suresh CG, Ramasamy S. Structural analysis of a penicillin V acylase from Pectobacterium atrosepticum confirms the importance of two Trp residues for activity and specificity. J Struct Biol 2015; 193:85-94. [PMID: 26707624 DOI: 10.1016/j.jsb.2015.12.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Revised: 12/16/2015] [Accepted: 12/16/2015] [Indexed: 10/22/2022]
Abstract
Penicillin V acylases (PVA) catalyze the deacylation of the beta-lactam antibiotic phenoxymethylpenicillin (Pen V). They are members of the Ntn hydrolase family and possess an N-terminal cysteine as the main catalytic nucleophile residue. They form the evolutionarily related cholylglycine hydrolase (CGH) group which includes bile salt hydrolases (BSH) responsible for bile deconjugation. Even though a few PVA and BSH structures have been reported, no structure of a functional PVA from Gram-negative bacteria is available. Here, we report the crystal structure of a highly active PVA from Gram-negative Pectobacterium atrosepticum (PaPVA) at 2.5Å resolution. Structural comparison with PVAs from Gram-positive bacteria revealed that PaPVA had a distinctive tetrameric structure and active site organization. In addition, mutagenesis of key active site residues and biochemical characterization of the resultant variants elucidated the role of these residues in substrate binding and catalysis. The importance of residue Trp23 and Trp87 side chains in binding and correct positioning of Pen V by PVAs was confirmed using mutagenesis and substrate docking with a 15ns molecular dynamics simulation. These results establish the unique nature of Gram-negative CGHs and necessitate further research about their substrate spectrum.
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Affiliation(s)
- Vellore Sunder Avinash
- Biochemical Sciences Division, National Chemical Laboratory (CSIR-NCL), Pune 411008, India
| | - Priyabrata Panigrahi
- Biochemical Sciences Division, National Chemical Laboratory (CSIR-NCL), Pune 411008, India
| | - Deepak Chand
- Biochemical Sciences Division, National Chemical Laboratory (CSIR-NCL), Pune 411008, India
| | - Archana Pundle
- Biochemical Sciences Division, National Chemical Laboratory (CSIR-NCL), Pune 411008, India
| | | | - Sureshkumar Ramasamy
- Biochemical Sciences Division, National Chemical Laboratory (CSIR-NCL), Pune 411008, India.
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Chand D, Varshney N, Ramasamy S, Panigrahi P, Brannigan JA, Wilkinson AJ, Suresh CG. Structure mediation in substrate binding and post-translational processing of penicillin acylases: Information from mutant structures of Kluyvera citrophila penicillin G acylase. Protein Sci 2015; 24:1660-70. [PMID: 26243007 DOI: 10.1002/pro.2761] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Revised: 07/10/2015] [Accepted: 07/10/2015] [Indexed: 11/07/2022]
Abstract
Penicillin acylases are industrially important enzymes for the production of 6-APA, which is used extensively in the synthesis of secondary antibiotics. The enzyme translates into an inactive single chain precursor that subsequently gets processed by the removal of a spacer peptide connecting the chains of the mature active heterodimer. We have cloned the penicillin G acylase from Kluyvera citrophila (KcPGA) and prepared two mutants by site-directed mutagenesis. Replacement of N-terminal serine of the β-subunit with cysteine (Serβ1Cys) resulted in a fully processed but inactive enzyme. The second mutant in which this serine is replaced by glycine (Serβ1Gly) remained in the unprocessed and inactive form. The crystals of both mutants belonged to space group P1 with four molecules in the asymmetric unit. The three-dimensional structures of these mutants were refined at resolutions 2.8 and 2.5 Å, respectively. Comparison of these structures with similar structures of Escherichia coli PGA (EcPGA) revealed various conformational changes that lead to autocatalytic processing and consequent removal of the spacer peptide. The large displacements of residues such as Arg168 and Arg477 toward the N-terminal cleavage site of the spacer peptide or the conformational changes of Arg145 and Phe146 near the active site in these structures suggested probable steps in the processing dynamics. A comparison between the structures of the processed Serβ1Cys mutant and that of the processed form of EcPGA showed conformational differences in residues Argα145, Pheα146, and Pheβ24 at the substrate binding pocket. Three conformational transitions of Argα145 and Pheα146 residues were seen when processed and unprocessed forms of KcPGA were compared with the substrate bound structure of EcPGA. Structure mediation in activity difference between KcPGA and EcPGA toward acyl homoserine lactone (AHL) is elucidated.
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Affiliation(s)
- Deepak Chand
- Division of Biochemical Sciences, CSIR-National Chemical Laboratory, Pune, 411008, India
| | - NishantKumar Varshney
- Division of Biochemical Sciences, CSIR-National Chemical Laboratory, Pune, 411008, India
| | - Sureshkumar Ramasamy
- Division of Biochemical Sciences, CSIR-National Chemical Laboratory, Pune, 411008, India
| | - Priyabrata Panigrahi
- Division of Biochemical Sciences, CSIR-National Chemical Laboratory, Pune, 411008, India
| | - James A Brannigan
- Structural Biology Laboratory, Department of Chemistry, University of York, York YO10 5DD, Heslington, United Kingdom
| | - Anthony J Wilkinson
- Structural Biology Laboratory, Department of Chemistry, University of York, York YO10 5DD, Heslington, United Kingdom
| | - C G Suresh
- Division of Biochemical Sciences, CSIR-National Chemical Laboratory, Pune, 411008, India
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Penicillin V acylase from Pectobacterium atrosepticum exhibits high specific activity and unique kinetics. Int J Biol Macromol 2015; 79:1-7. [PMID: 25931393 DOI: 10.1016/j.ijbiomac.2015.04.036] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Revised: 04/07/2015] [Accepted: 04/09/2015] [Indexed: 01/18/2023]
Abstract
Penicillin V acylases (PVAs, E.C.3.5.11) belong to the Ntn hydrolase super family of enzymes that catalyze the deacylation of the side chain from phenoxymethyl penicillin (penicillin V). Penicillin acylases find use in the pharmaceutical industry for the production of semi-synthetic antibiotics. PVAs employ the N-terminal cysteine residue as catalytic nucleophile and are structurally and evolutionarily related to bile salt hydrolases (BSHs). Here, we report the cloning and characterization of a PVA enzyme from the Gram-negative plant pathogen, Pectobacterium atrosepticum (PaPVA). The enzyme was cloned and expressed in Escherichia coli attaining a very high yield (250 mg/l) and a comparatively high specific activity (430 IU/mg). The enzyme showed marginally better pH and thermo-stability over PVAs characterized from Gram-positive bacteria. The enzyme also showed enhanced activity in presence of organic solvents and detergents. The enzyme kinetics turned out to be significantly different from that of previously reported PVAs, displaying positive cooperativity and substrate inhibition. The presence of bile salts had a modulating effect on PaPVA activity. Sequence analysis and characterization reveal the distinctive nature of these enzymes and underscore the need to study PVAs from Gram-negative bacteria.
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Mukherji R, Prabhune A. Possible Correlation Between Bile Salt Hydrolysis and AHL Deamidation: Staphylococcus epidermidis RM1, a Potent Quorum Quencher and Bile Salt Hydrolase Producer. Appl Biochem Biotechnol 2015; 176:140-50. [DOI: 10.1007/s12010-015-1563-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Accepted: 03/12/2015] [Indexed: 11/29/2022]
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Avinash VS, Pundle AV, Ramasamy S, Suresh CG. Penicillin acylases revisited: importance beyond their industrial utility. Crit Rev Biotechnol 2014; 36:303-16. [PMID: 25430891 DOI: 10.3109/07388551.2014.960359] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
It is of great importance to study the physiological roles of enzymes in nature; however, in some cases, it is not easily apparent. Penicillin acylases are pharmaceutically important enzymes that cleave the acyl side chains of penicillins, thus paving the way for production of newer semi-synthetic antibiotics. They are classified according to the type of penicillin (G or V) that they preferentially hydrolyze. Penicillin acylases are also used in the resolution of racemic mixtures and peptide synthesis. However, it is rather unfortunate that the focus on the use of penicillin acylases for industrial applications has stolen the spotlight from the study of the importance of these enzymes in natural metabolism. The penicillin acylases, so far characterized from different organisms, show differences in their structural nature and substrate spectrum. These enzymes are also closely related to the bacterial signalling phenomenon, quorum sensing, as detailed in this review. This review details studies on biochemical and structural characteristics of recently discovered penicillin acylases. We also attempt to organize the available insights into the possible in vivo role of penicillin acylases and related enzymes and emphasize the need to refocus research efforts in this direction.
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Affiliation(s)
- Vellore Sunder Avinash
- a Division of Biochemical Sciences, CSIR-National , National Chemical Laboratory , Pune , India
| | - Archana Vishnu Pundle
- a Division of Biochemical Sciences, CSIR-National , National Chemical Laboratory , Pune , India
| | - Sureshkumar Ramasamy
- a Division of Biochemical Sciences, CSIR-National , National Chemical Laboratory , Pune , India
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37
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Fetzner S. Quorum quenching enzymes. J Biotechnol 2014; 201:2-14. [PMID: 25220028 DOI: 10.1016/j.jbiotec.2014.09.001] [Citation(s) in RCA: 196] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Revised: 08/29/2014] [Accepted: 09/04/2014] [Indexed: 01/12/2023]
Abstract
Bacteria use cell-to-cell communication systems based on chemical signal molecules to coordinate their behavior within the population. These quorum sensing systems are potential targets for antivirulence therapies, because many bacterial pathogens control the expression of virulence factors via quorum sensing networks. Since biofilm maturation is also usually influenced by quorum sensing, quenching these systems may contribute to combat biofouling. One possibility to interfere with quorum sensing is signal inactivation by enzymatic degradation or modification. Such quorum quenching enzymes are wide-spread in the bacterial world and have also been found in eukaryotes. Lactonases and acylases that hydrolyze N-acyl homoserine lactone (AHL) signaling molecules have been investigated most intensively, however, different oxidoreductases active toward AHLs or 2-alkyl-4(1H)-quinolone signals as well as other signal-converting enzymes have been described. Several approaches have been assessed which aim at alleviating virulence, or biofilm formation, by reducing the signal concentration in the bacterial environment. These involve the application or stimulation of signal-degrading bacteria as biocontrol agents in the protection of crop plants against soft-rot disease, the use of signal-degrading bacteria as probiotics in aquaculture, and the immobilization or entrapment of quorum quenching enzymes or bacteria to control biofouling in membrane bioreactors. While most approaches to use quorum quenching as antivirulence strategy are still in the research phase, the growing number of organisms and enzymes known to interfere with quorum sensing opens up new perspectives for the development of innovative antibacterial strategies.
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Affiliation(s)
- Susanne Fetzner
- Institute of Molecular Microbiology and Biotechnology, University of Muenster, Corrensstrasse 3, D-48149 Muenster, Germany.
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