1
|
Mahajan S, Ramya TNC. Cellulophaga algicola alginate lyase inhibits biofilm formation of a clinical Pseudomonas aeruginosa strain MCC 2081. IUBMB Life 2020; 73:444-462. [PMID: 33350564 DOI: 10.1002/iub.2442] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 12/14/2020] [Accepted: 12/17/2020] [Indexed: 12/31/2022]
Abstract
Alginate lyases are potential agents for disrupting alginate-rich Pseudomonas biofilms in the infected lungs of cystic fibrosis patients but there is as yet no clinically approved alginate lyase that can be used as a therapeutic. We report here the endolytic alginate lyase activity of a recombinant Cellulophaga algicola alginate lyase domain (CaAly) encoded by a gene that also codes for an N-terminal carbohydrate-binding module, CBM6, and a central F-type lectin domain (CaFLD). CaAly degraded both polyM and polyG alginates with optimal temperature and pH of 37°C and pH 7, respectively, with greater preference for polyG. Recombinant CaFLD bound to fucosylated glycans with a preference for H-type 2 glycan motif, and did not have any apparent effect on the enzyme activity of the co-associated alginate lyase domain in the recombinant protein construct, CaFLD_Aly. We assessed the potential of CaAly and other alginate lyases previously reported in published literature to inhibit biofilm formation by a clinical strain, Pseudomonas aeruginosa MCC 2081. Of all the alginate lyases tested, CaAly displayed most inhibition of in vitro biofilm formation on plastic surfaces. We also assessed its inhibitory ability against P. aeruginosa 2081 biofilms formed over a monolayer of A549 lung epithelial cells. Our study indicated that CaAly is efficacious in inhibition of biofilm formation even on A549 lung epithelial cell line monolayers.
Collapse
Affiliation(s)
- Sonal Mahajan
- Protein Science and Engineering Department, Institute of Microbial Technology, Chandigarh, India
| | | |
Collapse
|
2
|
Circular pellicles formed by Pseudomonas alkylphenolica KL28 are a sophisticated architecture principally designed by matrix substance. J Microbiol 2018; 56:790-797. [PMID: 30353464 DOI: 10.1007/s12275-018-8252-7] [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: 05/08/2018] [Revised: 07/23/2018] [Accepted: 07/26/2018] [Indexed: 10/28/2022]
Abstract
The colonization of liquid surfaces as floating biofilms or pellicles is a bacterial adaptation to optimally occupy the airliquid (A-L) niche. In aerobic heterotrophs, pellicle formation is beneficial for the utilization of O2 and nonpolar organic compounds. Pseudomonas alkylphenolica KL28, an alkylphenol degrader, forms flat circular pellicles that are 0.3-0.5 mm in diameter. In this study, we first monitored the pellicle developmental patterns of multicellular organization from the initial settlement stage. The pellicles developed by clonal growth and mutants for flagella and pilus formation established normal pellicles. In contrast, the mutants of an epm gene cluster for biosynthesis of alginate-like polymer were incompetent in cell alignment for initial two-dimensional (2D) pellicle growth, suggesting the role of the Epm polymer as a structural scaffold for pellicle biofilms. Microscopic observation revealed that the initial 2D growth transited to multilayers by an accumulated self-produced extracellular polymeric substance that may exert a constraint force. Electron microscopy and confocal laser scanning microscopy revealed that the fully matured pellicle structures were densly packed with matrix-encased cells displaying distinct arrangements. The cells on the surface of the pellicle were relatively flat, and those inside were longitudinally cross-packed. The extracellular polysaccharide stained by Congo red was denser on the pellicle rim and a thin film was observed in the open spaces, indicative of its role in pellicle flotation. Our results demonstrate that P. alkylphenolica KL28 coordinately dictates the cell arrangements of pellicle biofilms by the controlled growth of constituent cells that accumulate extracellular polymeric substances.
Collapse
|
3
|
Cho H, Huang X, Lan Piao Y, Eun Kim D, Yeon Lee S, Jeong Yoon E, Hee Park S, Lee K, Ho Jang C, Zhan CG. Molecular modeling and redesign of alginate lyase from Pseudomonas aeruginosa for accelerating CRPA biofilm degradation. Proteins 2016; 84:1875-1887. [PMID: 27676452 DOI: 10.1002/prot.25171] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Revised: 08/31/2016] [Accepted: 09/16/2016] [Indexed: 11/12/2022]
Abstract
Administration of an efficient alginate lyase (AlgL) or AlgL mutant may be a promising therapeutic strategy for treatment of cystic fibrosis patients with Pseudomonas aeruginosa infections. Nevertheless, the catalytic activity of wild-type AlgL is not sufficiently high. It is highly desired to design and discover an AlgL mutant with significantly improved catalytic efficiency against alginate substrates. For the purpose of identifying an AlgL mutant with significantly improved catalytic activity, in this study, we first constructed and validated a structural model of AlgL interacting with substrate, providing a better understanding of the interactions between AlgL and its substrate. Based on the modeling insights, further enzyme redesign and experimental testing led to discovery of AlgL mutants, including the K197D/K321A mutant, with significantly improved catalytic activities against alginate and acetylated alginate in ciprofloxacin-resistant P. aeruginosa (CRPA) biofilms. Further anti-biofilm activity assays have confirmed that the K197D/K321A mutant with piperacillin/tazobactam is indeed effective in degrading the CRPA biofilms. Co-administration of the potent mutant AlgL and an antibiotic (such as a nebulizer) could be effective for therapeutic treatment of CRPA-infected patients with cystic fibrosis. Proteins 2016; 84:1875-1887. © 2016 Wiley Periodicals, Inc.
Collapse
Affiliation(s)
- Hoon Cho
- Department of Polymer Science & Engineering, Chosun University, Gwangju, 501-759, Republic of Korea
| | - Xiaoqin Huang
- Molecular Modeling and Biopharmaceutical Center, Center of Pharmaceutical Research and Innovation, and Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky
| | - Yu Lan Piao
- Department of Polymer Science & Engineering, Chosun University, Gwangju, 501-759, Republic of Korea
| | - Da Eun Kim
- Department of Polymer Science & Engineering, Chosun University, Gwangju, 501-759, Republic of Korea
| | - So Yeon Lee
- Department of Polymer Science & Engineering, Chosun University, Gwangju, 501-759, Republic of Korea
| | - Eun Jeong Yoon
- Department of Polymer Science & Engineering, Chosun University, Gwangju, 501-759, Republic of Korea
| | - So Hee Park
- Department of Polymer Science & Engineering, Chosun University, Gwangju, 501-759, Republic of Korea
| | - Kyoung Lee
- Department of Microbiology, Changwon National University, Changwon, Kyongnam, 641-773, Republic of Korea
| | - Chul Ho Jang
- Department of Otolaryngology, Chonnam National University Medical School, Gwangju, 501-757, Republic of Korea
| | - Chang-Guo Zhan
- Molecular Modeling and Biopharmaceutical Center, Center of Pharmaceutical Research and Innovation, and Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky
| |
Collapse
|
4
|
Lee K, Ha GS, Veeranagouda Y, Seo YS, Hwang I. A CHASE3/GAF sensor hybrid histidine kinase BmsA modulates biofilm formation and motility in Pseudomonas alkylphenolica. MICROBIOLOGY-SGM 2016; 162:1945-1954. [PMID: 27655385 DOI: 10.1099/mic.0.000373] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Pseudomonas alkylphenolica is an important strain in the biodegradation of toxic alkylphenols and mass production of bioactive polymannuronate polymers. This strain forms a diverse, 3D biofilm architecture, including mushroom-like aerial structures, circular pellicles and surface spreading, depending on culture conditions. A mutagenesis and complementation study showed that a predicted transmembrane kinase, PSAKL28_21690 (1164 aa), harbouring a periplasmic CHASE3 domain flanked by two transmembrane helices in addition to its cytoplasmic GAF, histidine kinase and three CheY-like response regulator domains, plays a positive role in the formation of the special biofilm architecture and a negative role in swimming activity. In addition, the gene, named here as bmsA, is co-transcribed with three genes encoding proteins with CheR (PSAKL28_21700) and CheB (PSAKL28_21710) domains and response regulator and histidine kinase domains (PSAKL28_21720). This gene cluster is thus named bmsABCD and is found widely distributed in pseudomonads and other bacteria. Deletion of the genes in the cluster, except forbmsA, did not result in changes in biofilm-related phenotypes. The RNA-seq analysis showed that the expression of genes coding for flagellar synthesis was increased when bmsA was mutated. In addition, the expression of rsmZ, which is one of final targets of the Gac regulon, was not significantly altered in the bmsA mutant, and overexpression of bmsA in the gacA mutant did not produce the WT phenotype. These results indicate that the sensory Bms regulon does not affect the upper cascade of the Gac signal transduction pathway for the biofilm-related phenotypes in P. alkylphenolica.
Collapse
Affiliation(s)
- Kyoung Lee
- Department of Bio Health Science, Changwon National University, Changwon-si, Kyongnam 51140, Republic of Korea
| | - Gwang Su Ha
- Department of Bio Health Science, Changwon National University, Changwon-si, Kyongnam 51140, Republic of Korea
| | - Yaligara Veeranagouda
- Department of Bio Health Science, Changwon National University, Changwon-si, Kyongnam 51140, Republic of Korea
| | - Young-Su Seo
- Department of Microbiology, Pusan National University, Busan 46241, Republic of Korea
| | - Ingyu Hwang
- Department of Agricultural Biotechnology, Seoul National University, Seoul 08826, Republic of Korea
| |
Collapse
|
5
|
Jang CH, Piao YL, Huang X, Yoon EJ, Park SH, Lee K, Zhan CG, Cho H. Modeling and Re-Engineering of Azotobacter vinelandii Alginate Lyase to Enhance Its Catalytic Efficiency for Accelerating Biofilm Degradation. PLoS One 2016; 11:e0156197. [PMID: 27253324 PMCID: PMC4890793 DOI: 10.1371/journal.pone.0156197] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Accepted: 05/10/2016] [Indexed: 02/07/2023] Open
Abstract
Alginate is known to prevent elimination of Pseudomonas aeruginosa biofilms. Alginate lyase (AlgL) might therefore facilitate treatment of Pseudomonas aeruginosa-infected cystic fibrosis patients. However, the catalytic activity of wild-type AlgL is not sufficiently high. Therefore, molecular modeling and site-directed mutagenesis of AlgL might assist in enzyme engineering for therapeutic development. AlgL, isolated from Azotobacter vinelandii, catalyzes depolymerization of alginate via a β-elimination reaction. AlgL was modeled based on the crystal structure template of Sphingomonas AlgL species A1-III. Based on this computational analysis, AlgL was subjected to site-directed mutagenesis to improve its catalytic activity. The kcat/Km of the K194E mutant showed a nearly 5-fold increase against the acetylated alginate substrate, as compared to the wild-type. Double and triple mutants (K194E/K245D, K245D/K319A, K194E/K245D/E312D, and K194E/K245D/K319A) were also prepared. The most potent mutant was observed to be K194E/K245D/K319A, which has a 10-fold improved kcat value (against acetylated alginate) compared to the wild-type enzyme. The antibiofilm effect of both AlgL forms was identified in combination with piperacillin/tazobactam (PT) and the disruption effect was significantly higher in mutant AlgL combined with PT than wild-type AlgL. However, for both the wild-type and K194E/K245D/K319A mutant, the use of the AlgL enzyme alone did not show significant antibiofilm effect.
Collapse
Affiliation(s)
- Chul Ho Jang
- Department of Otolaryngology, Chonnam National University Medical School, Gwangju, 501–757, Republic of Korea
| | - Yu Lan Piao
- Department of Polymer Science & Engineering, Chosun University, Gwangju, 501–759, South Korea
| | - Xiaoqin Huang
- Molecular Modeling and Biopharmaceutical Center and Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, Kentucky, 40536, United States of America
| | - Eun Jeong Yoon
- Department of Polymer Science & Engineering, Chosun University, Gwangju, 501–759, South Korea
| | - So Hee Park
- Department of Polymer Science & Engineering, Chosun University, Gwangju, 501–759, South Korea
| | - Kyoung Lee
- Department of Microbiology, Changwon National University, Changwon, Kyongnam, 641–773, Republic of Korea
| | - Chang-Guo Zhan
- Molecular Modeling and Biopharmaceutical Center and Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, Kentucky, 40536, United States of America
| | - Hoon Cho
- Department of Polymer Science & Engineering, Chosun University, Gwangju, 501–759, South Korea
| |
Collapse
|
6
|
Mulet M, Sánchez D, Lalucat J, Lee K, García-Valdés E. Pseudomonas alkylphenolica sp. nov., a bacterial species able to form special aerial structures when grown on p-cresol. Int J Syst Evol Microbiol 2015; 65:4013-4018. [DOI: 10.1099/ijsem.0.000529] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Pseudomonas sp. KL28T is an aerobic, rod-shaped bacterium that was isolated from the soil of Changwon, South Korea, based on its ability to grow in the presence of linear alkylphenols (C1–C5). Despite several studies on strain KL28T, it could not be assigned to any known species in the genus Pseudomonas. The name ‘Pseudomonas alkylphenolia’ was proposed for KL28T, but the strain had not until now been characterized taxonomically and the name currently has no standing in the bacterial nomenclature. A 16S rRNA gene sequence based phylogenetic analysis suggested an affiliation of strain KL28T with the Pseudomonas putida group, with Pseudomonas vranovensis DSM 16006T as the most closely related type strain (99.1 % similarity). A multilocus phylogenetic sequence analysis performed by concatenating 16S rRNA, gyrB, rpoD and rpoB partial gene sequences showed that isolate KL28T could be differentiated from P. vranovensis DSM 16006T (sequence similarity 93.7 %). Genomic comparisons of strain KL28T with the type strains of the species in the P. putida group using average nucleotide index based on blast (ANIb) and genome-to genome distances (GGDC) revealed 87.06 % and 32.20 % similarities with P. vranovensis DSM 16006T, respectively, as the closest type strain. Both values are far from the thresholds established for species differentiation. These results, together with differences in phenotypic features and chemotaxonomic analyses [fatty acids and whole-cell matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) MS], support the proposal of strain KL28T ( = JCM 16553T = KCTC 22206T) as the type strain of a novel species, for which the formerly proposed name, ‘P. alkylphenolia’, is correctly latinized as Pseudomonas alkylphenolica sp. nov.
Collapse
Affiliation(s)
- Magdalena Mulet
- Microbiologia, Departament de Biologia, Edifici Guillem Colom, Universitat de les Illes Balears, Crtra. Valldemossa km 7.5, Campus UIB, 07122 Palma de Mallorca, Spain
| | - David Sánchez
- Microbiologia, Departament de Biologia, Edifici Guillem Colom, Universitat de les Illes Balears, Crtra. Valldemossa km 7.5, Campus UIB, 07122 Palma de Mallorca, Spain
| | - Jorge Lalucat
- Microbiologia, Departament de Biologia, Edifici Guillem Colom, Universitat de les Illes Balears, Crtra. Valldemossa km 7.5, Campus UIB, 07122 Palma de Mallorca, Spain
- Institut Mediterrani d'Estudis Avançats (IMEDEA, CSIC-UIB), Campus UIB, 07122 Palma de Mallorca, Spain
| | - Kyoung Lee
- Department of Bio Health Science, Changwon National University, Changwon-si, Kyongnam 641-773, Republic of Korea
| | - Elena García-Valdés
- Microbiologia, Departament de Biologia, Edifici Guillem Colom, Universitat de les Illes Balears, Crtra. Valldemossa km 7.5, Campus UIB, 07122 Palma de Mallorca, Spain
- Institut Mediterrani d'Estudis Avançats (IMEDEA, CSIC-UIB), Campus UIB, 07122 Palma de Mallorca, Spain
| |
Collapse
|
7
|
Maalej H, Hmidet N, Boisset C, Buon L, Heyraud A, Nasri M. Optimization of exopolysaccharide production from Pseudomonas stutzeri
AS22 and examination of its metal-binding abilities. J Appl Microbiol 2014; 118:356-67. [DOI: 10.1111/jam.12688] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Revised: 10/14/2014] [Accepted: 11/01/2014] [Indexed: 01/29/2023]
Affiliation(s)
- H. Maalej
- Laboratoire de Génie Enzymatique et de Microbiologie; Université de Sfax-Ecole Nationale d'Ingénieurs de Sfax; Sfax Tunisia
| | - N. Hmidet
- Laboratoire de Génie Enzymatique et de Microbiologie; Université de Sfax-Ecole Nationale d'Ingénieurs de Sfax; Sfax Tunisia
| | - C. Boisset
- Centre de Recherches sur les Macromolécules Végétales; C.N.R.S.; Université Joseph Fourier; Grenoble Cedex France
| | - L. Buon
- Centre de Recherches sur les Macromolécules Végétales; C.N.R.S.; Université Joseph Fourier; Grenoble Cedex France
| | - A. Heyraud
- Centre de Recherches sur les Macromolécules Végétales; C.N.R.S.; Université Joseph Fourier; Grenoble Cedex France
| | - M. Nasri
- Laboratoire de Génie Enzymatique et de Microbiologie; Université de Sfax-Ecole Nationale d'Ingénieurs de Sfax; Sfax Tunisia
| |
Collapse
|
8
|
Lim JY, Lee K, Hwang I. Complete genome sequence of the mushroom-like aerial structure-forming Pseudomonas alkylphenolia, a platform bacterium for mass production of poly-β-d-mannuronates. J Biotechnol 2014; 192 Pt A:20-1. [PMID: 25300744 DOI: 10.1016/j.jbiotec.2014.09.024] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2014] [Accepted: 09/17/2014] [Indexed: 10/24/2022]
Abstract
Pseudomonas alkylphenolia (KCTC 22206, JCM 16553) metabolizes phenols with an alkyl chain (C1-C5) at the para position. This strain forms mushroom-like aerial structures under p-cresol vapor, and its mutants are exploited to augment the production of poly-β-d-mannuronate and its derivatives. In this study, we report the 5.7Mbp complete genome sequence of P. alkylphenolia, which will provide a basis for biotechnological applications of this strain.
Collapse
Affiliation(s)
- Jae Yun Lim
- Department of Agricultural Biotechnology, Seoul National University, Seoul 151-921, Republic of Korea
| | - Kyoung Lee
- Department of Microbiology, Changwon National University, Changwon-si 641-773, Republic of Korea.
| | - Ingyu Hwang
- Department of Agricultural Biotechnology, Seoul National University, Seoul 151-921, Republic of Korea.
| |
Collapse
|
9
|
Lee K, Lim EJ, Kim KS, Huang SL, Veeranagouda Y, Rehm BHA. An alginate-like exopolysaccharide biosynthesis gene cluster involved in biofilm aerial structure formation by Pseudomonas alkylphenolia. Appl Microbiol Biotechnol 2014; 98:4137-48. [PMID: 24493568 DOI: 10.1007/s00253-014-5529-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2013] [Revised: 01/06/2014] [Accepted: 01/07/2014] [Indexed: 10/25/2022]
Abstract
Pseudomonas alkylphenolia is known to form different types of multicellular structures depending on the environmental stimuli. Aerial structures formed during vapor p-cresol utilization are unique. Transposon mutants that showed a smooth colony phenotype failed to form a differentiated biofilm, including aerial structures and pellicles, and showed deficient surface spreading motility. The transposon insertion sites were located to a gene cluster designated epm (extracellular polymer matrix), which comprises 11 ORFs in the same transcriptional orientation. The putative proteins encoded by the genes in the epm cluster showed amino acid sequence homology to those found in the alginate biosynthesis gene clusters, e.g., in Pseudomonas aeruginosa at similarity levels of 32.3-86.4 %. This overall resemblance indicated that the epm gene cluster encodes proteins that mediate the synthesis of an exopolysaccharide composed of uronic acid(s) similar to alginate. Our preliminary results suggested that the epm-derived polymer is a substituted polymannuronic acid. Gene clusters homologous to the epm gene cluster are found in the genomes of a few species of the genera Pseudomonas, Alcanivorax, and Marinobacter. A mutational analysis showed that the epmJ and epmG genes encoding putative exopolysaccharide-modifying enzymes are required to form multicellular structures. An analysis of the activity of the promoter P epmD using a transcriptional fusion to the green fluorescence protein gene showed that the epm genes are strongly expressed at the tips of the specialized aerial structures. Our results suggested that the epm gene cluster is involved in the formation of a scaffold polysaccharide that is required to form multicellular structures in P. alkylphenolia.
Collapse
Affiliation(s)
- Kyoung Lee
- Department of Microbiology and Biomedical Science Institute at CWNU, Changwon National University, Changwon-si, Kyongnam, 641-773, South Korea,
| | | | | | | | | | | |
Collapse
|
10
|
Park YJ, Chu YJ, Shin YH, Lee EY, Kim HS. Molecular cloning and characterization of a novel acetylalginate esterase gene in alg operon from Sphingomonas sp. MJ-3. Appl Microbiol Biotechnol 2013; 98:2145-54. [DOI: 10.1007/s00253-013-5126-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2013] [Revised: 07/11/2013] [Accepted: 07/12/2013] [Indexed: 10/26/2022]
|