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Ghosh D, Mangar P, Choudhury A, Kumar A, Saha A, Basu P, Saha D. Characterization of a hemolytic and antibiotic-resistant Pseudomonas aeruginosa strain S3 pathogenic to fish isolated from Mahananda River in India. PLoS One 2024; 19:e0300134. [PMID: 38547304 PMCID: PMC10977779 DOI: 10.1371/journal.pone.0300134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 02/21/2024] [Indexed: 04/02/2024] Open
Abstract
Virulent strain Pseudomonas aeruginosa isolated from Mahananda River exhibited the highest hemolytic activity and virulence factors and was pathogenic to fish as clinical signs of hemorrhagic spots, loss of scales, and fin erosions were found. S3 was cytotoxic to the human liver cell line (WRL-68) in the trypan blue dye exclusion assay. Genotype characterization using whole genome analysis showed that S3 was similar to P. aeruginosa PAO1. The draft genome sequence had an estimated length of 62,69,783 bp, a GC content of 66.3%, and contained 5916 coding sequences. Eight genes across the genome were predicted to be related to hemolysin action. Antibiotic resistance genes such as class C and class D beta-lactamases, fosA, APH, and catB were detected, along with the strong presence of multiple efflux system genes. This study shows that river water is contaminated by pathogenic P. aeruginosa harboring an array of virulence and antibiotic resistance genes which warrants periodic monitoring to prevent disease outbreaks.
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Affiliation(s)
- Dipanwita Ghosh
- Department of Biotechnology, University of North Bengal, Siliguri, West Bengal, India
| | - Preeti Mangar
- Department of Botany, University of North Bengal, Siliguri, West Bengal, India
| | - Abhinandan Choudhury
- Department of Biotechnology, University of North Bengal, Siliguri, West Bengal, India
| | - Anoop Kumar
- Department of Biotechnology, University of North Bengal, Siliguri, West Bengal, India
| | - Aniruddha Saha
- Department of Botany, University of North Bengal, Siliguri, West Bengal, India
| | - Protip Basu
- Department of Botany, Siliguri College, West Bengal, India
| | - Dipanwita Saha
- Department of Biotechnology, University of North Bengal, Siliguri, West Bengal, India
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2
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Chen Y, Guo R, Liang Y, Luo L, Han Y, Wang H, Zhang H, Liu Y, Zheng K, Shao H, Sung YY, Mok WJ, Wong LL, McMinn A, Wang M. Characterization and genomic analysis of a novel lytic phage vB_PstM_ZRG1 infecting Stutzerimonas stutzeri, representing a new viral genus, Elithevirus. Virus Res 2023; 334:199183. [PMID: 37499764 PMCID: PMC10404802 DOI: 10.1016/j.virusres.2023.199183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 07/20/2023] [Accepted: 07/24/2023] [Indexed: 07/29/2023]
Abstract
Stutzerimonas stutzeri is an opportunistic pathogen widely distributed in the environment and displays diverse metabolic capabilities. In this study, a novel lytic S. stutzeri phage, named vB_PstM_ZRG1, was isolated from the seawater in the East China Sea (29°09'N, 123°39'E). vB_PstM_ZRG1 was stable at temperatures ranging from -20°C to 65°C and across a wide range of pH values from 3 to 10. The genome of vB_PstM_ZRG1 was determined to be a double-stranded DNA with a genome size of 52,767 bp, containing 78 putative open reading frames (ORFs). Three auxiliary metabolic genes encoded by phage vB_PstM_ZRG1 were predicted, including Toll/interleukin-1 receptor (TIR) domain, proline-alanine-alanine-arginine (PAAR) protein and SGNH (Ser-Gly-Asn-His) family hydrolase, especially TIR domain is not common in isolated phages. Phylogenic and network analysis showed that vB_PstM_ZRG1 has low similarity to other phage genomes in the GenBank and IMG/VR database, and might represent a novel viral genus, named Elithevirus. Additionally, the distribution map results indicated that vB_PstM_ZRG1 could infect both extreme colds- and warm-type hosts in the marine environment. In summary, our finding provided basic information for further research on the relationship between S. stutzeri and their phages, and expanded our understanding of genomic characteristics, phylogenetic diversity and distribution of Elithevirus.
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Affiliation(s)
- Ying Chen
- College of Marine Life Sciences, Institute of Evolution and Marine Biodiversity, Frontiers Science Center for Deep Ocean Multispheres and Earth System, Center for Ocean Carbon Neutrality, Ocean University of China, Qingdao, China
| | - Ruizhe Guo
- College of Marine Life Sciences, Institute of Evolution and Marine Biodiversity, Frontiers Science Center for Deep Ocean Multispheres and Earth System, Center for Ocean Carbon Neutrality, Ocean University of China, Qingdao, China
| | - Yantao Liang
- College of Marine Life Sciences, Institute of Evolution and Marine Biodiversity, Frontiers Science Center for Deep Ocean Multispheres and Earth System, Center for Ocean Carbon Neutrality, Ocean University of China, Qingdao, China; UMT-OUC Joint Academic Centre for Marine Studies, Qingdao, China.
| | - Lin Luo
- College of Marine Life Sciences, Institute of Evolution and Marine Biodiversity, Frontiers Science Center for Deep Ocean Multispheres and Earth System, Center for Ocean Carbon Neutrality, Ocean University of China, Qingdao, China
| | - Ying Han
- College of Marine Life Sciences, Institute of Evolution and Marine Biodiversity, Frontiers Science Center for Deep Ocean Multispheres and Earth System, Center for Ocean Carbon Neutrality, Ocean University of China, Qingdao, China
| | - Hongmin Wang
- College of Marine Life Sciences, Institute of Evolution and Marine Biodiversity, Frontiers Science Center for Deep Ocean Multispheres and Earth System, Center for Ocean Carbon Neutrality, Ocean University of China, Qingdao, China
| | - Hong Zhang
- College of Marine Life Sciences, Institute of Evolution and Marine Biodiversity, Frontiers Science Center for Deep Ocean Multispheres and Earth System, Center for Ocean Carbon Neutrality, Ocean University of China, Qingdao, China
| | - Yundan Liu
- College of Marine Life Sciences, Institute of Evolution and Marine Biodiversity, Frontiers Science Center for Deep Ocean Multispheres and Earth System, Center for Ocean Carbon Neutrality, Ocean University of China, Qingdao, China
| | - Kaiyang Zheng
- College of Marine Life Sciences, Institute of Evolution and Marine Biodiversity, Frontiers Science Center for Deep Ocean Multispheres and Earth System, Center for Ocean Carbon Neutrality, Ocean University of China, Qingdao, China
| | - Hongbing Shao
- College of Marine Life Sciences, Institute of Evolution and Marine Biodiversity, Frontiers Science Center for Deep Ocean Multispheres and Earth System, Center for Ocean Carbon Neutrality, Ocean University of China, Qingdao, China; UMT-OUC Joint Academic Centre for Marine Studies, Qingdao, China
| | - Yeong Yik Sung
- UMT-OUC Joint Academic Centre for Marine Studies, Qingdao, China; Institute of Marine Biotechnology, Universiti Malaysia Terengganu, Kuala Terengganu, Malaysia
| | - Wen Jye Mok
- UMT-OUC Joint Academic Centre for Marine Studies, Qingdao, China; Institute of Marine Biotechnology, Universiti Malaysia Terengganu, Kuala Terengganu, Malaysia
| | - Li Lian Wong
- UMT-OUC Joint Academic Centre for Marine Studies, Qingdao, China; Institute of Marine Biotechnology, Universiti Malaysia Terengganu, Kuala Terengganu, Malaysia
| | - Andrew McMinn
- College of Marine Life Sciences, Institute of Evolution and Marine Biodiversity, Frontiers Science Center for Deep Ocean Multispheres and Earth System, Center for Ocean Carbon Neutrality, Ocean University of China, Qingdao, China; Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, TAS, Australia
| | - Min Wang
- College of Marine Life Sciences, Institute of Evolution and Marine Biodiversity, Frontiers Science Center for Deep Ocean Multispheres and Earth System, Center for Ocean Carbon Neutrality, Ocean University of China, Qingdao, China; UMT-OUC Joint Academic Centre for Marine Studies, Qingdao, China; Haide College, Ocean University of China, Qingdao, China; The Affiliated Hospital of Qingdao University, Qingdao 266000, China.
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3
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Inoue H, Tachibana T, Bito T, Arima J. Acetylation of amines and alcohols catalyzed by acetylcholinesterase from Pseudomonas aeruginosa PAO1. Enzyme Microb Technol 2023; 165:110208. [PMID: 36753877 DOI: 10.1016/j.enzmictec.2023.110208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 01/17/2023] [Accepted: 01/24/2023] [Indexed: 01/28/2023]
Abstract
Acetylcholinesterase (AChE) from Pseudomonas aeruginosa PAO1 has a catalytic Ser residue in its active site. In this study, we examined the aminolysis and alcoholysis reactions of AChE that occurred alongside its hydrolysis reaction. The recombinant AChE recognized ethyl acetate as a substrate. Therefore, we evaluated acetylation of the amine and hydroxyl group by AChE, using acetylcholine and ethyl acetate as the acetyl donor. AChE recognized diaminoalkanes with 4- to 12-carbon chains and aminoalcohols with 4- to 8-carbon chains as acetyl acceptors, resulting in their acetylated products. In the acetylation of 1,6-diaminohexane, AChE preferentially used ethyl acetate as the acetyl donor above pH 8.0 and the efficiency increased with increasing pH. In contrast, the acetylation of 6-amino-1-hexanol was efficient with acetylcholine as the acetyl donor in the pH range of 4-10. In addition, acetylated 6-amino-1-hexanol was decomposed by AChE. The kinetic study indicated that the acetyl donor and acceptor are competitively recognized by AChE as substrates.
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Affiliation(s)
- Hisashi Inoue
- Department of Agricultural Science, Graduate School of Sustainability Science, Tottori University, 4-101 Koyama-Minami, Tottori City, Tottori 680-8553, Japan.
| | - Teruyuki Tachibana
- Department of Agricultural, Life and Environmental Sciences, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori City, Tottori 680-8553, Japan
| | - Tomohiro Bito
- Department of Agricultural, Life and Environmental Sciences, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori City, Tottori 680-8553, Japan.
| | - Jiro Arima
- Department of Agricultural, Life and Environmental Sciences, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori City, Tottori 680-8553, Japan.
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4
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Tlais AZA, Polo A, Filannino P, Cantatore V, Gobbetti M, Di Cagno R. Biofilm formation as an extra gear for Apilactobacillus kunkeei to counter the threat of agrochemicals in honeybee crop. Microb Biotechnol 2022; 15:2160-2175. [PMID: 35417624 PMCID: PMC9328740 DOI: 10.1111/1751-7915.14051] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 03/08/2022] [Accepted: 03/09/2022] [Indexed: 01/04/2023] Open
Abstract
The alteration of a eubiosis status in honeybees' gut microbiota is directly linked to the occurrence of diseases, and likely to the honeybees decline. Since fructophilic lactobacilli were suggested as symbionts for honeybees, we mechanistically investigated their behaviour under the exposure to agrochemicals (Roundup, Mediator and Reldan containing glyphosate, imidacloprid and chlorpyrifos-methyl as active ingredients respectively) and plant secondary metabolites (nicotine and p-coumaric acid) ingested by honeybees as part of their diet. The effects of exposure to agrochemicals and plant secondary metabolites were assessed both on planktonic cells and sessile communities of three biofilm-forming strains of Apilactobacillus kunkeei. We identified the high sensitivity of A. kunkeei planktonic cells to Roundup and Reldan, while cells embedded in mature biofilms had increased resistance to the same agrochemicals. However, agrochemicals still exerted a substantial inhibitory/control effect if the exposure was during the preliminary steps of biofilm formation. The level of susceptibility resulted to be strain-specific. Exopolysaccharides resulted in the main component of extracellular polymeric matrix (ECM) in biofilm, but the exposure to Roundup caused a change in ECM production and composition. Nicotine and p-coumaric acid had a growth-promoting effect in sessile communities, although no effect was found on planktonic growth.
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Affiliation(s)
| | - Andrea Polo
- Faculty of Sciences and TechnologyLibera Università di BolzanoBolzanoItaly
| | - Pasquale Filannino
- Department of Soil, Plant and Food ScienceUniversity of Bari Aldo MoroBariItaly
| | - Vincenzo Cantatore
- Department of Soil, Plant and Food ScienceUniversity of Bari Aldo MoroBariItaly
| | - Marco Gobbetti
- Faculty of Sciences and TechnologyLibera Università di BolzanoBolzanoItaly
| | - Raffaella Di Cagno
- Faculty of Sciences and TechnologyLibera Università di BolzanoBolzanoItaly
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5
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Bilginer S, Gul HI, Hanci H, Gulcin I. Antibacterial and Acetylcholinesterase Inhibitory Potentials of Triazenes Containg Sulfonamide Moiety. Pharm Chem J 2021. [DOI: 10.1007/s11094-021-02412-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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6
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Pham VD, To TA, Gagné-Thivierge C, Couture M, Lagüe P, Yao D, Picard MÈ, Lortie LA, Attéré SA, Zhu X, Levesque RC, Charette SJ, Shi R. Structural insights into the putative bacterial acetylcholinesterase ChoE and its substrate inhibition mechanism. J Biol Chem 2020; 295:8708-8724. [PMID: 32371400 PMCID: PMC7324521 DOI: 10.1074/jbc.ra119.011809] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 05/04/2020] [Indexed: 01/01/2023] Open
Abstract
Mammalian acetylcholinesterase (AChE) is well-studied, being important in both cholinergic brain synapses and the peripheral nervous systems and also a key drug target for many diseases. In contrast, little is known about the structures and molecular mechanism of prokaryotic acetylcholinesterases. We report here the structural and biochemical characterization of ChoE, a putative bacterial acetylcholinesterase from Pseudomonas aeruginosa Analysis of WT and mutant strains indicated that ChoE is indispensable for P. aeruginosa growth with acetylcholine as the sole carbon and nitrogen source. The crystal structure of ChoE at 1.35 Å resolution revealed that this enzyme adopts a typical fold of the SGNH hydrolase family. Although ChoE and eukaryotic AChEs catalyze the same reaction, their overall structures bear no similarities constituting an interesting example of convergent evolution. Among Ser-38, Asp-285, and His-288 of the catalytic triad residues, only Asp-285 was not essential for ChoE activity. Combined with kinetic analyses of WT and mutant proteins, multiple crystal structures of ChoE complexed with substrates, products, or reaction intermediate revealed the structural determinants for substrate recognition, snapshots of the various catalytic steps, and the molecular basis of substrate inhibition at high substrate concentrations. Our results indicate that substrate inhibition in ChoE is due to acetate release being blocked by the binding of a substrate molecule in a nonproductive mode. Because of the distinct overall folds and significant differences of the active site between ChoE and eukaryotic AChEs, these structures will serve as a prototype for other prokaryotic acetylcholinesterases.
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Affiliation(s)
- Van Dung Pham
- Département de Biochimie, de Microbiologie et de Bio-informatique, Université Laval, Québec, Canada; Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, Canada; PROTEO, the Québec Network for Research on Protein Function, Engineering, and Applications, Québec, Canada
| | - Tuan Anh To
- Département de Biochimie, de Microbiologie et de Bio-informatique, Université Laval, Québec, Canada; Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, Canada; PROTEO, the Québec Network for Research on Protein Function, Engineering, and Applications, Québec, Canada
| | - Cynthia Gagné-Thivierge
- Département de Biochimie, de Microbiologie et de Bio-informatique, Université Laval, Québec, Canada; Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, Canada; Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Hôpital Laval, Québec, Canada
| | - Manon Couture
- Département de Biochimie, de Microbiologie et de Bio-informatique, Université Laval, Québec, Canada; Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, Canada; PROTEO, the Québec Network for Research on Protein Function, Engineering, and Applications, Québec, Canada
| | - Patrick Lagüe
- Département de Biochimie, de Microbiologie et de Bio-informatique, Université Laval, Québec, Canada; Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, Canada; PROTEO, the Québec Network for Research on Protein Function, Engineering, and Applications, Québec, Canada
| | - Deqiang Yao
- iHuman Institute, ShanghaiTech University, Shanghai, P.R. China
| | - Marie-Ève Picard
- Département de Biochimie, de Microbiologie et de Bio-informatique, Université Laval, Québec, Canada; Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, Canada; PROTEO, the Québec Network for Research on Protein Function, Engineering, and Applications, Québec, Canada
| | - Louis-André Lortie
- Département de Biochimie, de Microbiologie et de Bio-informatique, Université Laval, Québec, Canada
| | - Sabrina A Attéré
- Département de Biochimie, de Microbiologie et de Bio-informatique, Université Laval, Québec, Canada; Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, Canada; Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Hôpital Laval, Québec, Canada
| | - Xiaojun Zhu
- Département de Biochimie, de Microbiologie et de Bio-informatique, Université Laval, Québec, Canada; Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, Canada; PROTEO, the Québec Network for Research on Protein Function, Engineering, and Applications, Québec, Canada
| | - Roger C Levesque
- Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, Canada
| | - Steve J Charette
- Département de Biochimie, de Microbiologie et de Bio-informatique, Université Laval, Québec, Canada; Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, Canada; Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Hôpital Laval, Québec, Canada
| | - Rong Shi
- Département de Biochimie, de Microbiologie et de Bio-informatique, Université Laval, Québec, Canada; Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, Canada; PROTEO, the Québec Network for Research on Protein Function, Engineering, and Applications, Québec, Canada.
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7
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Sepčić K, Sabotič J, A. Ohm R, Drobne D, Jemec Kokalj A. First evidence of cholinesterase-like activity in Basidiomycota. PLoS One 2019; 14:e0216077. [PMID: 31039204 PMCID: PMC6490906 DOI: 10.1371/journal.pone.0216077] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 04/13/2019] [Indexed: 11/28/2022] Open
Abstract
Cholinesterases (ChE), the enzymes whose primary function is the hydrolysis of choline esters, are widely expressed throughout the nature. Although they have already been found in plants and microorganisms, including ascomycete fungi, this study is the first report of ChE-like activity in fungi of the phylum Basidiomycota. This activity was detected in almost a quarter of the 45 tested aqueous fungal extracts. The ability of these extracts to hydrolyse acetylthiocholine was about ten times stronger than the hydrolytic activity towards butyrylthiocholine and propionylthiocholine. In-gel detection of ChE-like activity with acetylthiocholine indicated a great variability in the characteristics of these enzymes which are not characterized as vertebrate-like based on (i) differences in inhibition by excess substrate, (ii) susceptibility to different vertebrate acetylcholinesterase and butyrylcholinesterase inhibitors, and (iii) a lack of orthologs using phylogenetic analysis. Limited inhibition by single inhibitors and multiple activity bands using in-gel detection indicate the presence of several ChE-like enzymes in these aqueous extracts. We also observed inhibitory activity of the same aqueous mushroom extracts against insect acetylcholinesterase in 10 of the 45 samples tested; activity was independent of the presence of ChE-like activity in extracts. Both ChE-like activities with different substrates and the ability of extracts to inhibit insect acetylcholinesterase were not restricted to any fungal family but were rather present across all included Basidiomycota families. This study can serve as a platform for further research regarding ChE activity in mushrooms.
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Affiliation(s)
- Kristina Sepčić
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Ljubljana, Slovenia
| | - Jerica Sabotič
- Department of Biotechnology, Jožef Stefan Institute, Ljubljana, Slovenia
| | - Robin A. Ohm
- Department of Biology, Faculty of Science, Utrecht University, Padualaan, Utrecht, The Netherlands
| | - Damjana Drobne
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Ljubljana, Slovenia
| | - Anita Jemec Kokalj
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Ljubljana, Slovenia
- * E-mail:
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8
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Kishk A, Hijaz F, Anber HAI, AbdEl-Raof TK, El-Sherbeni AHD, Hamed S, Killiny N. RNA interference of acetylcholinesterase in the Asian citrus psyllid, Diaphorina citri, increases its susceptibility to carbamate and organophosphate insecticides. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2017; 143:81-89. [PMID: 29183615 DOI: 10.1016/j.pestbp.2017.09.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 09/07/2017] [Accepted: 09/11/2017] [Indexed: 05/20/2023]
Abstract
The Asian citrus psyllid, Diaphorina citri Kuwayama (Hemiptera: Lividae) transmits the Candidatus Liberibacter asiaticus, which causes citrus greening disease or Huanglongbing, (HLB). To date, there is no efficient cure for HLB disease and the control of D. citri using insecticides became the most important tools for the management of HLB. However, the extensive use of insecticides could increase D. citri resistance to these insecticides. The objective of this study was to investigate the effect of RNA interference of acetylcholinesterase (AChE) on the mortality and susceptibility of D. citri to the four major insecticides used in Florida. In this study, we used a consensus sequence derived from the two AChE genes and cholinesterase 2-like (ChE-2-like) gene to target all of the three genes. Treatment with dsRNA-AChE increased the mortality percentages of both nymphs and adults of D. citri. The mortality percentage increased with the increase in the concentration of applied dsRNA-AChE, and the highest mortality (> 60%) was observed at the highest applied concentration (125ng/μl). Treatments of nymphs or adults with dsRNA-AChE down-regulated the expression of the three targeted genes of D. citri. Silencing of AChE and ChE in D. citri nymphs increased the susceptibility of emerged adults to chlorpyrifos and carbaryl, which act as AChE inhibitors. However, treatment with dsRNA-AChE did not increase the susceptibility of emerged adults to imidacloprid, which acts as an agonist of nicotinic acetylcholine receptors. In the same manner, treatment of adults with dsRNA-AChE increased their susceptibility to chlorpyrifos and carbaryl, but did not affect their susceptibility to imidacloprid. The ANOVA did not show any significant increase in susceptibility of D. citri adults to fenpropathrin after treatment with dsRNA-AChE, either as nymphs or as adults. However, simple linear regression showed that treatment with dsRNA-AChE increased D. citri susceptibility to fenpropathrin, which indicated that AChE could be involved in the metabolism of fenpropathrin. Our results indicated that silencing of AChE and ChE genes in D. citri to increase its susceptibility to insecticides could be a promising tool for the control of this important vector.
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Affiliation(s)
- Abdelaziz Kishk
- Department of Plant Pathology, IFAS, Citrus Research and Education Center, University of Florida, Lake Alfred, FL, USA; Department of Plant Protection, Faculty of Agriculture, Tanta University, Tanta, Egypt
| | - Faraj Hijaz
- Department of Plant Pathology, IFAS, Citrus Research and Education Center, University of Florida, Lake Alfred, FL, USA
| | - Helmy A I Anber
- Department of Plant Protection, Faculty of Agriculture, Tanta University, Tanta, Egypt
| | - Tsamoh K AbdEl-Raof
- Department of Plant Protection, Faculty of Agriculture, Tanta University, Tanta, Egypt
| | | | - Sobhy Hamed
- Department of Plant Protection, Faculty of Agriculture, Tanta University, Tanta, Egypt
| | - Nabil Killiny
- Department of Plant Pathology, IFAS, Citrus Research and Education Center, University of Florida, Lake Alfred, FL, USA.
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Sánchez DG, Primo ED, Damiani MT, Lisa AT. Pseudomonas aeruginosa gbdR gene is transcribed from a σ54-dependent promoter under the control of NtrC/CbrB, IHF and BetI. MICROBIOLOGY-SGM 2017; 163:1343-1354. [PMID: 28791946 DOI: 10.1099/mic.0.000502] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Pseudomonasaeruginosa uses choline as a source of carbon and nitrogen, and also for the synthesis of glycine betaine, an osmoprotectant under stress conditions such as drought and salinity. The transcription factor GbdR is the specific regulator of choline metabolism and it belongs to the Arac/XylS family of transcriptional regulators. Despite the link between choline catabolism and bacterial pathogenicity, gbdR regulation has not been explored in detail. In the present work, we describe how gbdR transcription can be initiated from a σ54-dependent promoter. gbdR transcription can be activated by NtrC in the absence of a preferential nitrogen source, by CbrB in the absence of a preferential carbon source, and by the integration host factor favouring DNA bending. In addition, we found that BetI negatively regulates gbdR expression in the absence of choline. We identified two overlapping BetI binding sites in the gbdR promoter sequence, providing an additional example of σ54-promoter down-regulation. Based on our findings, we propose a model for gdbR regulation and its impact on choline metabolism.
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Affiliation(s)
- Diego Germán Sánchez
- Laboratory of Phagocytosis and Intracellular Transport, School of Medicine, University of Cuyo, IHEM-CONICET, Mendoza 5500, Argentina.,Department of Molecular Biology, FCEFQN, National University of Río Cuarto, Route 36-Km 601, 5800, Argentina
| | - Emiliano David Primo
- Department of Molecular Biology, FCEFQN, National University of Río Cuarto, Route 36-Km 601, 5800, Argentina
| | - María Teresa Damiani
- Laboratory of Phagocytosis and Intracellular Transport, School of Medicine, University of Cuyo, IHEM-CONICET, Mendoza 5500, Argentina
| | - Angela Teresita Lisa
- Department of Molecular Biology, FCEFQN, National University of Río Cuarto, Route 36-Km 601, 5800, Argentina
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10
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SGNH hydrolase-type esterase domain containing Cbes-AcXE2: a novel and thermostable acetyl xylan esterase from Caldicellulosiruptor bescii. Extremophiles 2017; 21:687-697. [DOI: 10.1007/s00792-017-0934-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Accepted: 04/17/2017] [Indexed: 12/18/2022]
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11
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Zhuang Q, Young A, Callam CS, McElroy CA, Ekici ÖD, Yoder RJ, Hadad CM. Efforts toward treatments against aging of organophosphorus-inhibited acetylcholinesterase. Ann N Y Acad Sci 2016; 1374:94-104. [PMID: 27327269 DOI: 10.1111/nyas.13124] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Revised: 05/06/2016] [Accepted: 05/10/2016] [Indexed: 11/26/2022]
Abstract
Aging is a dealkylation reaction of organophosphorus (OP)-inhibited acetylcholinesterase (AChE). Despite many studies to date, aged AChE cannot be reactivated directly by traditional pyridinium oximes. This review summarizes strategies that are potentially valuable in the treatment against aging in OP poisoning. Among them, retardation of aging seeks to lower the rate of aging through the use of AChE effectors. These drugs should be administered before AChE is completely aged. For postaging treatment, realkylation of aged AChE by appropriate alkylators may pave the way for oxime treatment by neutralizing the oxyanion at the active site of aged AChE. The other two strategies, upregulation of AChE expression and introduction of exogenous AChE, cannot resurrect aged AChE but may compensate for lowered active AChE levels by in situ production or external introduction of active AChE. Upregulation of AChE expression can be triggered by some peptides. Sources of exogenous AChE can be whole blood or purified AChE, either from human or nonhuman species.
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Affiliation(s)
- Qinggeng Zhuang
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio
| | - Amneh Young
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio
| | - Christopher S Callam
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio
| | - Craig A McElroy
- College of Pharmacy, The Ohio State University, Columbus, Ohio
| | - Özlem Dogan Ekici
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio.,Department of Chemistry and Biochemistry, The Ohio State University-Newark, Newark, Ohio
| | - Ryan J Yoder
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio.,Department of Chemistry and Biochemistry, The Ohio State University-Marion, Marion, Ohio
| | - Christopher M Hadad
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio
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12
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Yamamoto K, Shida S, Honda Y, Shono M, Miyake H, Oguri S, Sakamoto H, Momonoki YS. Overexpression of acetylcholinesterase gene in rice results in enhancement of shoot gravitropism. Biochem Biophys Res Commun 2015; 465:488-93. [PMID: 26277389 DOI: 10.1016/j.bbrc.2015.08.044] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2015] [Accepted: 08/10/2015] [Indexed: 10/23/2022]
Abstract
Acetylcholine (ACh), a known neurotransmitter in animals and acetylcholinesterase (AChE) exists widely in plants, although its role in plant signal transduction is unclear. We previously reported AChE in Zea mays L. might be related to gravitropism based on pharmacological study using an AChE inhibitor. Here we clearly demonstrate plant AChE play an important role as a positive regulator in the gravity response of plants based on a genetic study. First, the gene encoding a second component of the ACh-mediated signal transduction system, AChE was cloned from rice, Oryza sativa L. ssp. Japonica cv. Nipponbare. The rice AChE shared high homology with maize, siratro and Salicornia AChEs. Similar to animal and other plant AChEs, the rice AChE hydrolyzed acetylthiocholine and propionylthiocholine, but not butyrylthiocholine. Thus, the rice AChE might be characterized as an AChE (E.C.3.1.1.7). Similar to maize and siratro AChEs, the rice AChE exhibited low sensitivity to the AChE inhibitor, neostigmine bromide, compared with the electric eel AChE. Next, the functionality of rice AChE was proved by overexpression in rice plants. The rice AChE was localized in extracellular spaces of rice plants. Further, the rice AChE mRNA and its activity were mainly detected during early developmental stages (2 d-10 d after sowing). Finally, by comparing AChE up-regulated plants with wild-type, we found that AChE overexpression causes an enhanced gravitropic response. This result clearly suggests that the function of the rice AChE relate to positive regulation of gravitropic response in rice seedlings.
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Affiliation(s)
- Kosuke Yamamoto
- Faculty of Bioindustry, Tokyo University of Agriculture, 196 Yasaka, Abashiri, Hokkaido, 099-2493, Japan.
| | - Satoshi Shida
- Faculty of Bioindustry, Tokyo University of Agriculture, 196 Yasaka, Abashiri, Hokkaido, 099-2493, Japan
| | - Yoshihiro Honda
- Faculty of Bioindustry, Tokyo University of Agriculture, 196 Yasaka, Abashiri, Hokkaido, 099-2493, Japan
| | - Mariko Shono
- Tropical Agriculture Research Front, Japan International Research Center for Agricultural Sciences, Maezato-Kawarabaru, Ishigaki, Okinawa, 907-0002, Japan
| | - Hiroshi Miyake
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, 464-8601, Japan
| | - Suguru Oguri
- Faculty of Bioindustry, Tokyo University of Agriculture, 196 Yasaka, Abashiri, Hokkaido, 099-2493, Japan
| | - Hikaru Sakamoto
- Faculty of Bioindustry, Tokyo University of Agriculture, 196 Yasaka, Abashiri, Hokkaido, 099-2493, Japan
| | - Yoshie S Momonoki
- Faculty of Bioindustry, Tokyo University of Agriculture, 196 Yasaka, Abashiri, Hokkaido, 099-2493, Japan.
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13
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Ryu BH, Nguyen DD, Ngo TD, Oh C, Pandian R, Kim KK, Kim TD. Crystallization and preliminary X-ray analysis of a highly stable novel SGNH hydrolase (Est24) from Sinorhizobium meliloti. Acta Crystallogr F Struct Biol Commun 2014; 70:193-5. [PMID: 24637754 PMCID: PMC3936437 DOI: 10.1107/s2053230x13033918] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Accepted: 12/16/2013] [Indexed: 11/10/2022] Open
Abstract
The SGNH hydrolase family includes enzymes that catalyze the hydrolysis of a broad range of substrates. Here, the crystallization and preliminary X-ray crystallographic studies of a novel SGNH hydrolase (Est24) from Sinorhizobium meliloti were performed. Recombinant Est24 protein containing an N-terminal His tag was expressed in Escherichia coli and purified to homogeneity. Est24 was then crystallized using a solution consisting of 0.2 M ammonium phosphate pH 4.6, 20% polyethylene glycol 3350. X-ray diffraction data were collected to a resolution of 1.45 Å with an R(merge) of 9.4%. The Est24 crystals belonged to space group C2, with unit-cell parameters a = 129.09, b = 88.63, c = 86.15 Å, α = 90.00, β = 114.30, γ = 90.00°. A molecular-replacement solution was obtained using the crystal structure of Mycobacterium smegmatis arylesterase as a template and structure refinement of Est24 is in progress.
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Affiliation(s)
- Bum Han Ryu
- Department of Applied Chemistry and Biological Engineering, College of Engineering, Ajou University, Suwon 443-749, Republic of Korea
| | - Duy Duc Nguyen
- Department of Molecular Cell Biology, Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Suwon 440-746, Republic of Korea
| | - Tri Duc Ngo
- Department of Molecular Cell Biology, Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Suwon 440-746, Republic of Korea
| | - Changsuk Oh
- Department of Molecular Cell Biology, Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Suwon 440-746, Republic of Korea
| | - Ramesh Pandian
- Department of Molecular Cell Biology, Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Suwon 440-746, Republic of Korea
| | - Kyeong Kyu Kim
- Department of Molecular Cell Biology, Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Suwon 440-746, Republic of Korea
| | - T. Doohun Kim
- Department of Applied Chemistry and Biological Engineering, College of Engineering, Ajou University, Suwon 443-749, Republic of Korea
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14
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Gallarato LA, Sánchez DG, Olvera L, Primo ED, Garrido MN, Beassoni PR, Morett E, Lisa AT. Exopolyphosphatase of Pseudomonas aeruginosa is essential for the production of virulence factors, and its expression is controlled by NtrC and PhoB acting at two interspaced promoters. Microbiology (Reading) 2014; 160:406-417. [DOI: 10.1099/mic.0.074773-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The exopolyphosphatase (Ppx) of Pseudomonas aeruginosa is encoded by the PA5241 gene (ppx). Ppx catalyses the hydrolysis of inorganic polyphosphates to orthophosphate (Pi). In the present work, we identified and characterized the promoter region of ppx and its regulation under environmental stress conditions. The role of Ppx in the production of several virulence factors was demonstrated through studies performed on a ppx null mutant. We found that ppx is under the control of two interspaced promoters, dually regulated by nitrogen and phosphate limitation. Under nitrogen-limiting conditions, its expression was controlled from a σ54-dependent promoter activated by the response regulator NtrC. However, under Pi limitation, the expression was controlled from a σ70 promoter, activated by PhoB. Results obtained from the ppx null mutant demonstrated that Ppx is involved in the production of virulence factors associated with both acute infection (e.g. motility-promoting factors, blue/green pigment production, C6–C12 quorum-sensing homoserine lactones) and chronic infection (e.g. rhamnolipids, biofilm formation). Molecular and physiological approaches used in this study indicated that P. aeruginosa maintains consistently proper levels of Ppx regardless of environmental conditions. The precise control of ppx expression appeared to be essential for the survival of P. aeruginosa and the occurrence of either acute or chronic infection in the host.
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Affiliation(s)
- Lucas A. Gallarato
- Departamento de Biología Molecular, FCEFQyN, Universidad Nacional de Río Cuarto, Ruta 36-Km 601, (5800) Río Cuarto, Córdoba, Argentina
| | - Diego G. Sánchez
- Departamento de Biología Molecular, FCEFQyN, Universidad Nacional de Río Cuarto, Ruta 36-Km 601, (5800) Río Cuarto, Córdoba, Argentina
| | - Leticia Olvera
- Departamento de Ingeniería Celular y Biocatálisis, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Morelos 62210, Mexico
| | - Emiliano D. Primo
- Departamento de Biología Molecular, FCEFQyN, Universidad Nacional de Río Cuarto, Ruta 36-Km 601, (5800) Río Cuarto, Córdoba, Argentina
| | - Mónica N. Garrido
- Departamento de Biología Molecular, FCEFQyN, Universidad Nacional de Río Cuarto, Ruta 36-Km 601, (5800) Río Cuarto, Córdoba, Argentina
| | - Paola R. Beassoni
- Departamento de Biología Molecular, FCEFQyN, Universidad Nacional de Río Cuarto, Ruta 36-Km 601, (5800) Río Cuarto, Córdoba, Argentina
| | - Enrique Morett
- Departamento de Ingeniería Celular y Biocatálisis, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Morelos 62210, Mexico
| | - Angela T. Lisa
- Departamento de Biología Molecular, FCEFQyN, Universidad Nacional de Río Cuarto, Ruta 36-Km 601, (5800) Río Cuarto, Córdoba, Argentina
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15
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Hampel KJ, LaBauve AE, Meadows JA, Fitzsimmons LF, Nock AM, Wargo MJ. Characterization of the GbdR regulon in Pseudomonas aeruginosa. J Bacteriol 2014; 196:7-15. [PMID: 24097953 PMCID: PMC3911141 DOI: 10.1128/jb.01055-13] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2013] [Accepted: 10/01/2013] [Indexed: 12/15/2022] Open
Abstract
Pseudomonas aeruginosa displays tremendous metabolic diversity, controlled in part by the abundance of transcription regulators in the genome. We have been investigating P. aeruginosa's response to the host, particularly changes regulated by the host-derived quaternary amines choline and glycine betaine (GB). We previously identified GbdR as an AraC family transcription factor that directly regulates choline acquisition from host phospholipids (via binding to plcH and pchP promoters), is required for catabolism of the choline metabolite GB, and is an activator that induces transcription in response to GB or dimethylglycine. Our goal was to characterize the GbdR regulon in P. aeruginosa by using genetics and chemical biology in combination with transcriptomics and in vitro DNA-binding assays. Here we show that GbdR activation regulates transcription of 26 genes from 12 promoters, 11 of which have measureable binding to GbdR in vitro. The GbdR regulon includes the genes encoding GB, dimethylglycine, sarcosine, glycine, and serine catabolic enzymes and the BetX and CbcXWV quaternary amine transport proteins. We characterized the GbdR consensus binding site and used it to identify that the recently characterized acetylcholine esterase gene, choE (PA4921), is also regulated by GbdR. The regulon member not directly controlled by GbdR is the secreted lipase gene lipA, which was also the only regulon member repressed under GbdR-activating conditions. Determination of the GbdR regulon provides deeper understanding of how GbdR links bacterial metabolism and virulence. Additionally, identification of two uncharacterized regulon members suggests roles for these proteins in response to choline metabolites.
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Affiliation(s)
- Ken J. Hampel
- Department of Microbiology and Molecular Genetics, University of Vermont College of Medicine, Burlington, Vermont, USA
| | - Annette E. LaBauve
- Department of Microbiology and Molecular Genetics, University of Vermont College of Medicine, Burlington, Vermont, USA
- The Vermont Lung Center, University of Vermont College of Medicine, Burlington, Vermont, USA
| | - Jamie A. Meadows
- Department of Microbiology and Molecular Genetics, University of Vermont College of Medicine, Burlington, Vermont, USA
| | - Liam F. Fitzsimmons
- Department of Microbiology and Molecular Genetics, University of Vermont College of Medicine, Burlington, Vermont, USA
| | - Adam M. Nock
- Department of Microbiology and Molecular Genetics, University of Vermont College of Medicine, Burlington, Vermont, USA
| | - Matthew J. Wargo
- Department of Microbiology and Molecular Genetics, University of Vermont College of Medicine, Burlington, Vermont, USA
- The Vermont Lung Center, University of Vermont College of Medicine, Burlington, Vermont, USA
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16
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Abstract
Pseudomonas aeruginosa is a versatile human opportunistic pathogen that produces and secretes an arsenal of enzymes, proteins and small molecules many of which serve as virulence factors. Notably, about 40 % of P. aeruginosa genes code for proteins of unknown function, among them more than 80 encoding putative, but still unknown lipolytic enzymes. This group of hydrolases (EC 3.1.1) is known already for decades, but only recently, several of these enzymes have attracted attention as potential virulence factors. Reliable and reproducible enzymatic activity assays are crucial to determine their physiological function and particularly assess their contribution to pathogenicity. As a consequence of the unique biochemical properties of lipids resulting in the formation of micellar structures in water, the reproducible preparation of substrate emulsions is strongly dependent on the method used. Furthermore, the physicochemical properties of the respective substrate emulsion may drastically affect the activities of the tested lipolytic enzymes. Here, we describe common methods for the activity determination of lipase, esterase, phospholipase, and lysophospholipase. These methods cover lipolytic activity assays carried out in vitro, with cell extracts or separated subcellular compartments and with purified enzymes. We have attempted to describe standardized protocols, allowing the determination and comparison of enzymatic activities of lipolytic enzymes from different sources. These methods should also encourage the Pseudomonas community to address the wealth of still unexplored lipolytic enzymes encoded and produced by P. aeruginosa.
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Affiliation(s)
- Karl-Erich Jaeger
- Institute of Molecular Enzyme Technology, Research Centre Juelich Heinrich-Heine-University of Duesseldorf, D-52426, Juelich, Germany,
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17
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Liberate and grab it, ingest and digest it: the GbdR regulon of the pathogen Pseudomonas aeruginosa. J Bacteriol 2013; 196:3-6. [PMID: 24163344 DOI: 10.1128/jb.01243-13] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The compatible solute glycine betaine is a powerful osmostress protectant, but many microorganisms can also use it as a nutrient. K. J. Hampel et al. (J. Bacteriol. 196:7-15, 2014) defined a regulon in the notorious pathogen Pseudomonas aeruginosa that comprises modules for the harvest and import of the glycine betaine biosynthetic precursor choline and its subsequent catabolism to pyruvate. The reported data link the GbdR activator with the metabolism of host-derived compounds (e.g., phosphocholine) and virulence traits of P. aeruginosa.
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18
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Kovačić F, Granzin J, Wilhelm S, Kojić-Prodić B, Batra-Safferling R, Jaeger KE. Structural and functional characterisation of TesA - a novel lysophospholipase A from Pseudomonas aeruginosa. PLoS One 2013; 8:e69125. [PMID: 23874889 PMCID: PMC3715468 DOI: 10.1371/journal.pone.0069125] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2013] [Accepted: 06/04/2013] [Indexed: 11/19/2022] Open
Abstract
TesA from Pseudomonas aeruginosa belongs to the GDSL hydrolase family of serine esterases and lipases that possess a broad substrate- and regiospecificity. It shows high sequence homology to TAP, a multifunctional enzyme from Escherichia coli exhibiting thioesterase, lysophospholipase A, protease and arylesterase activities. Recently, we demonstrated high arylesterase activity for TesA, but only minor thioesterase and no protease activity. Here, we present a comparative analysis of TesA and TAP at the structural, biochemical and physiological levels. The crystal structure of TesA was determined at 1.9 Å and structural differences were identified, providing a possible explanation for the differences in substrate specificities. The comparison of TesA with other GDSL-hydrolase structures revealed that the flexibility of active-site loops significantly affects their substrate specificity. This assumption was tested using a rational approach: we have engineered the putative coenzyme A thioester binding site of E. coli TAP into TesA of P. aeruginosa by introducing mutations D17S and L162R. This TesA variant showed increased thioesterase activity comparable to that of TAP. TesA is the first lysophospholipase A described for the opportunistic human pathogen P. aeruginosa. The enzyme is localized in the periplasm and may exert important functions in the homeostasis of phospholipids or detoxification of lysophospholipids.
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Affiliation(s)
- Filip Kovačić
- Institut für Molekulare Enzymtechnologie, Heinrich-Heine Universität Düsseldorf, Forschungszentrum Jülich, Jülich, Germany
| | - Joachim Granzin
- Institute of Complex Systems (ICS-6), Forschungszentrum Jülich, Jülich, Germany
| | - Susanne Wilhelm
- Institut für Molekulare Enzymtechnologie, Heinrich-Heine Universität Düsseldorf, Forschungszentrum Jülich, Jülich, Germany
| | | | | | - Karl-Erich Jaeger
- Institut für Molekulare Enzymtechnologie, Heinrich-Heine Universität Düsseldorf, Forschungszentrum Jülich, Jülich, Germany
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