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Li M, Xiong L, Chen W, Li Y, Khan A, Powell CA, Chen B, Zhang M. VirB11, a traffic ATPase, mediated flagella assembly and type IV pilus morphogenesis to control the motility and virulence of Xanthomonas albilineans. MOLECULAR PLANT PATHOLOGY 2024; 25:e70001. [PMID: 39223938 PMCID: PMC11369208 DOI: 10.1111/mpp.70001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2024] [Revised: 07/29/2024] [Accepted: 08/13/2024] [Indexed: 09/04/2024]
Abstract
Xanthomonas albilineans (Xal) is a gram-negative bacterial pathogen responsible for developing sugarcane leaf scald disease, which engenders significant economic losses within the sugarcane industry. In the current study, homologous recombination exchange was carried out to induce mutations within the virB/D4-like type IV secretion system (T4SS) genes of Xal. The results revealed that the virB11-deletion mutant (ΔvirB11) exhibited a loss in swimming and twitching motility. Application of transmission electron microscopy analysis further demonstrated that the ΔvirB11 failed to develop flagella formation and type IV pilus morphology and exhibited reduced swarming behaviour and virulence. However, these alterations had no discernible impact on bacterial growth. Comparative transcriptome analysis between the wild-type Xal JG43 and the deletion-mutant ΔvirB11 revealed 123 differentially expressed genes (DEGs), of which 28 and 10 DEGs were notably associated with flagellar assembly and chemotaxis, respectively. In light of these findings, we postulate that virB11 plays an indispensable role in regulating the processes related to motility and chemotaxis in Xal.
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Affiliation(s)
- Meilin Li
- Guangxi Key Laboratory for Sugarcane Biology & State Key Laboratory of Conservation and Utilization for Subtropical Agri‐Biological ResourcesGuangxi UniversityNanningGuangxiChina
| | - Liya Xiong
- Guangxi Key Laboratory for Sugarcane Biology & State Key Laboratory of Conservation and Utilization for Subtropical Agri‐Biological ResourcesGuangxi UniversityNanningGuangxiChina
| | - Wenhan Chen
- Guangxi Key Laboratory for Sugarcane Biology & State Key Laboratory of Conservation and Utilization for Subtropical Agri‐Biological ResourcesGuangxi UniversityNanningGuangxiChina
| | - YiSha Li
- Guangxi Key Laboratory for Sugarcane Biology & State Key Laboratory of Conservation and Utilization for Subtropical Agri‐Biological ResourcesGuangxi UniversityNanningGuangxiChina
| | - Abdullah Khan
- Guangxi Key Laboratory for Sugarcane Biology & State Key Laboratory of Conservation and Utilization for Subtropical Agri‐Biological ResourcesGuangxi UniversityNanningGuangxiChina
| | | | - Baoshan Chen
- Guangxi Key Laboratory for Sugarcane Biology & State Key Laboratory of Conservation and Utilization for Subtropical Agri‐Biological ResourcesGuangxi UniversityNanningGuangxiChina
| | - Muqing Zhang
- Guangxi Key Laboratory for Sugarcane Biology & State Key Laboratory of Conservation and Utilization for Subtropical Agri‐Biological ResourcesGuangxi UniversityNanningGuangxiChina
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Alexandrino AV, Barcelos MP, Federico LB, da Silva TG, Cavalca LB, de Moraes CHA, Ferreira H, Taft CA, Behlau F, de Paula Silva CHT, Novo-Mansur MTM. GDP-mannose pyrophosphorylase is an efficient target in Xanthomonas citri for citrus canker control. Microbiol Spectr 2024; 12:e0367323. [PMID: 38722158 PMCID: PMC11237706 DOI: 10.1128/spectrum.03673-23] [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] [Accepted: 03/20/2024] [Indexed: 06/06/2024] Open
Abstract
Xanthomonas citri subsp. citri (Xcc) is a bacterium that causes citrus canker, an economically important disease that results in premature fruit drop and reduced yield of fresh fruit. In this study, we demonstrated the involvement of XanB, an enzyme with phosphomannose isomerase (PMI) and guanosine diphosphate-mannose pyrophosphorylase (GMP) activities, in Xcc pathogenicity. Additionally, we found that XanB inhibitors protect the host against Xcc infection. Besides being deficient in motility, biofilm production, and ultraviolet resistance, the xanB deletion mutant was unable to cause disease, whereas xanB complementation restored wild-type phenotypes. XanB homology modeling allowed in silico virtual screening of inhibitors from databases, three of them being suitable in terms of absorption, distribution, metabolism, excretion, and toxicity (ADME/Tox) properties, which inhibited GMP (but not PMI) activity of the Xcc recombinant XanB protein in more than 50%. Inhibitors reduced citrus canker severity up to 95%, similarly to copper-based treatment. xanB is essential for Xcc pathogenicity, and XanB inhibitors can be used for the citrus canker control. IMPORTANCE Xcc causes citrus canker, a threat to citrus production, which has been managed with copper, being required a more sustainable alternative for the disease control. XanB was previously found on the surface of Xcc, interacting with the host and displaying PMI and GMP activities. We demonstrated by xanB deletion and complementation that GMP activity plays a critical role in Xcc pathogenicity, particularly in biofilm formation. XanB homology modeling was performed, and in silico virtual screening led to carbohydrate-derived compounds able to inhibit XanB activity and reduce disease symptoms by 95%. XanB emerges as a promising target for drug design for control of citrus canker and other economically important diseases caused by Xanthomonas sp.
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Affiliation(s)
- André Vessoni Alexandrino
- Laboratório de Bioquímica e Biologia Molecular Aplicada (LBBMA), Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos, São Paulo, Brazil
- Programa de Pós-Graduação em Biotecnologia (PPGBiotec), Universidade Federal de São Carlos, São Carlos, São Paulo, Brazil
| | - Mariana Pegrucci Barcelos
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Leonardo Bruno Federico
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Tamiris Garcia da Silva
- Departamento de Pesquisa e Desenvolvimento, Fundo de Defesa da Citricultura, Fundecitrus, Araraquara, São Paulo, Brazil
| | - Lúcia Bonci Cavalca
- Departamento de Bioquímica e Microbiologia, Instituto de Biociências, UNESP, Universidade Estadual Paulista, Rio Claro, São Paulo, Brazil
| | - Carlos Henrique Alves de Moraes
- Laboratório de Bioquímica e Biologia Molecular Aplicada (LBBMA), Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos, São Paulo, Brazil
| | - Henrique Ferreira
- Departamento de Bioquímica e Microbiologia, Instituto de Biociências, UNESP, Universidade Estadual Paulista, Rio Claro, São Paulo, Brazil
| | | | - Franklin Behlau
- Departamento de Pesquisa e Desenvolvimento, Fundo de Defesa da Citricultura, Fundecitrus, Araraquara, São Paulo, Brazil
| | | | - Maria Teresa Marques Novo-Mansur
- Laboratório de Bioquímica e Biologia Molecular Aplicada (LBBMA), Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos, São Paulo, Brazil
- Programa de Pós-Graduação em Biotecnologia (PPGBiotec), Universidade Federal de São Carlos, São Carlos, São Paulo, Brazil
- Programa de Pós-Graduação em Genética Evolutiva e Biologia Molecular (PPGGEv), Universidade Federal de São Carlos, São Carlos, São Paulo, Brazil
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Zhang X, Zhang Z, Chen T, Chen Y, Li B, Tian S. Characterization of two SGNH family cell death-inducing proteins from the horticulturally important fungal pathogen Botrytis cinerea based on the optimized prokaryotic expression system. MOLECULAR HORTICULTURE 2024; 4:9. [PMID: 38449027 PMCID: PMC10919021 DOI: 10.1186/s43897-024-00086-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Accepted: 02/07/2024] [Indexed: 03/08/2024]
Abstract
Botrytis cinerea is one of the most destructive phytopathogenic fungi, causing significant losses to horticultural crops. As a necrotrophic fungus, B. cinerea obtains nutrients by killing host cells. Secreted cell death-inducing proteins (CDIPs) play a crucial role in necrotrophic infection; however, only a limited number have been reported. For high-throughput CDIP screening, we optimized the prokaryotic expression system and compared its efficiency with other commonly used protein expression systems. The optimized prokaryotic expression system showed superior effectiveness and efficiency and was selected for subsequent CDIP screening. The screening system verified fifty-five candidate proteins and identified two novel SGNH family CDIPs: BcRAE and BcFAT. BcRAE and BcFAT exhibited high expression levels throughout the infection process. Site-directed mutagenesis targeting conserved Ser residues abolished the cell death-inducing activity of both BcRAE and BcFAT. Moreover, the transient expression of BcRAE and BcFAT in plants enhanced plant resistance against B. cinerea without inducing cell death, independent of their enzymatic activities. Our results suggest a high-efficiency screening system for high-throughput CDIP screening and provide new targets for further study of B. cinerea-plant interactions.
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Affiliation(s)
- Xiaokang Zhang
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhanquan Zhang
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Tong Chen
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Yong Chen
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Boqiang Li
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Shiping Tian
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China.
- University of Chinese Academy of Sciences, Beijing, 100049, China.
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Alexandrino AV, Prieto EL, Nicolela NCS, da Silva Marin TG, Dos Santos TA, de Oliveira da Silva JPM, da Cunha AF, Behlau F, Novo-Mansur MTM. Xylose Isomerase Depletion Enhances Virulence of Xanthomonas citri subsp. citri in Citrus aurantifolia. Int J Mol Sci 2023; 24:11491. [PMID: 37511250 PMCID: PMC10380989 DOI: 10.3390/ijms241411491] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 04/14/2023] [Accepted: 04/17/2023] [Indexed: 07/30/2023] Open
Abstract
Citrus canker, caused by the bacterium Xanthomonas citri (Xcc), is one of the most devastating diseases for the citrus industry. Xylose is a constituent of the cell wall of plants, and the ability of Xcc to use this carbohydrate may play a role in virulence. Xcc has two genes codifying for xylose isomerase (XI), a bifunctional enzyme that interconverts D-xylose into D-xylulose and D-glucose into D-fructose. The aim of this work was to investigate the functional role of the two putative XI ORFs, XAC1776 (xylA1) and XAC4225 (xylA2), in Xcc pathogenicity. XI-coding genes of Xcc were deleted, and the single mutants (XccΔxylA1 or XccΔxylA2) or the double mutant (XccΔxylA1ΔxylA2) remained viable. The deletion of one or both XI genes (xylA1 and/or xylA2) increased the aggressiveness of the mutants, causing disease symptoms. RT-qPCR analysis of wild strain and xylA deletion mutants grown in vivo and in vitro revealed that the highest expression level of hrpX and xylR was observed in vivo for the double mutant. The results indicate that XI depletion increases the expression of the hrp regulatory genes in Xcc. We concluded that the intracellular accumulation of xylose enhances Xcc virulence.
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Affiliation(s)
- André Vessoni Alexandrino
- Laboratório de Bioquímica e Biologia Molecular Aplicada-LBBMA, Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos 13565-905, SP, Brazil
- Programa de Pós-Graduação em Biotecnologia-PPGBiotec, Universidade Federal de São Carlos, São Carlos 13565-905, SP, Brazil
| | - Evandro Luis Prieto
- Laboratório de Bioquímica e Biologia Molecular Aplicada-LBBMA, Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos 13565-905, SP, Brazil
- Programa de Pós-Graduação em Genética Evolutiva e Biologia Molecular-PPGGEv, Universidade Federal de São Carlos, São Carlos 13565-905, SP, Brazil
| | - Nicole Castro Silva Nicolela
- Laboratório de Bioquímica e Biologia Molecular Aplicada-LBBMA, Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos 13565-905, SP, Brazil
| | | | | | - João Pedro Maia de Oliveira da Silva
- Programa de Pós-Graduação em Genética Evolutiva e Biologia Molecular-PPGGEv, Universidade Federal de São Carlos, São Carlos 13565-905, SP, Brazil
- Laboratório de Bioquímica e Genética Aplicada-LBGA, Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos 13565-905, SP, Brazil
| | - Anderson Ferreira da Cunha
- Programa de Pós-Graduação em Genética Evolutiva e Biologia Molecular-PPGGEv, Universidade Federal de São Carlos, São Carlos 13565-905, SP, Brazil
- Laboratório de Bioquímica e Genética Aplicada-LBGA, Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos 13565-905, SP, Brazil
| | - Franklin Behlau
- Fundo de Defesa da Citricultura-Fundecitrus, Araraquara 14807-040, SP, Brazil
| | - Maria Teresa Marques Novo-Mansur
- Laboratório de Bioquímica e Biologia Molecular Aplicada-LBBMA, Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos 13565-905, SP, Brazil
- Programa de Pós-Graduação em Biotecnologia-PPGBiotec, Universidade Federal de São Carlos, São Carlos 13565-905, SP, Brazil
- Programa de Pós-Graduação em Genética Evolutiva e Biologia Molecular-PPGGEv, Universidade Federal de São Carlos, São Carlos 13565-905, SP, Brazil
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Huang Y, Li H, Zhao G, Bai Q, Huang M, Luo D, Li X. Ethylicin Inhibition of Xanthomonas oryzae pv. oryzicola In Vitro and In Vivo. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:1405-1416. [PMID: 36644843 DOI: 10.1021/acs.jafc.2c07327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Infestation of rice with the bacterium Xanthomonas oryzae pv. oryzicola (Xoc) causes the serious disease bacterial leaf streak (BLS). We studied the effect of ethylicin, a broad-spectrum bactericide, on Xoc both in vivo and in vitro. Ethylicin increases the defensive enzyme activities and defensive genes expression of rice. Ethylicin also significantly inhibited Xoc activity in vitro compared with other commercial bactericides. The half-maximal effective concentration (EC50) of ethylicin was 2.12 μg/mL. It has been shown that ethylicin can inhibit Xoc quorum sensing through the production of extracellular polysaccharides and enzymes, which disrupt the Xoc cell membrane. We used proteomic analysis to identify two oxidative phosphorylation pathway proteins (ACU12_RS13405 and ACU12_RS13355) which affected the virulence of Xoc and validated them using quantitative real-time polymerase chain reaction (qRT-PCR). The results indicate that ethylicin can increase the defense responses of rice and control Xoc proliferation.
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Affiliation(s)
- Yajiao Huang
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang550025, China
| | - Hongde Li
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang550025, China
| | - Guili Zhao
- College of Chemical Engineering, Guizhou Institute of Technology, Guiyang550003, China
| | - Qian Bai
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang550025, China
| | - Min Huang
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang550025, China
| | - Dan Luo
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang550025, China
| | - Xiangyang Li
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang550025, China
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Vobruba S, Kadlcik S, Janata J, Kamenik Z. TldD/TldE peptidases and N-deacetylases: A structurally unique yet ubiquitous protein family in the microbial metabolism. Microbiol Res 2022; 265:127186. [PMID: 36155963 DOI: 10.1016/j.micres.2022.127186] [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: 07/03/2022] [Revised: 09/02/2022] [Accepted: 09/05/2022] [Indexed: 10/14/2022]
Abstract
Here we provide a review on TldD/TldE family proteins, summarizing current knowledge and outlining further research perspectives. Despite being widely distributed in bacteria and archaea, TldD/TldE proteins have been escaping attention for a long time until several recent reports pointed to their unique features. Specifically, TldD/TldE generally act as peptidases, though some of them turned out to be N-deacetylases. Biological function of TldD/TldE has been extensively described in bacterial specialized metabolism, in which they participate in the biosynthesis of lincosamide antibiotics (as N-deacetylases), and in the biosynthesis of ribosomally synthesized and post-translationally modified bioactive peptides (as peptidases). These enzymes possess special position in the relevant biosynthesis since they convert non-bioactive intermediates into bioactive metabolites. Further, based on a recent study of Escherichia coli TldD/TldE, these heterodimeric metallopeptidases possess a new protein fold exhibiting several structural features with no precedent in the Protein Data Bank. The most interesting ones are structural elements forming metal-containing active site on the inner surface of the catalytically active subunit TldD, in which substrates bind through β sheet interactions in the sequence-independent manner. It results in relaxed substrate specificity of TldD/TldE, which is counterbalanced by enclosing the active centre within the hollow core of the heterodimer and only appropriate substrates can entry through a narrow channel. Based on the published data, we hypothesize a yet unrecognized central metabolic function of TldD/TldE in the degradation of (partially) unfolded proteins, i.e., in protein quality control.
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Affiliation(s)
- Simon Vobruba
- Czech Academy of Sciences, Institute of Microbiology, Prague, Czech Republic
| | - Stanislav Kadlcik
- Czech Academy of Sciences, Institute of Microbiology, Prague, Czech Republic
| | - Jiri Janata
- Czech Academy of Sciences, Institute of Microbiology, Prague, Czech Republic
| | - Zdenek Kamenik
- Czech Academy of Sciences, Institute of Microbiology, Prague, Czech Republic.
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Hu M, Li C, Xue Y, Hu A, Chen S, Chen Y, Lu G, Zhou X, Zhou J. Isolation, Characterization, and Genomic Investigation of a Phytopathogenic Strain of Stenotrophomonas maltophilia. PHYTOPATHOLOGY 2021; 111:2088-2099. [PMID: 33759550 DOI: 10.1094/phyto-11-20-0501-r] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Stenotrophomonas maltophilia is ubiquitous in diverse environmental habitats. It merits significant concern because of its increasing incidence of nosocomial and community-acquired infection in immunocompromised patients and multiple drug resistance. It is rarely reported as a phytopathogen except in causing white stripe disease of rice in India and postharvest fruit rot of Lanzhou lily. For this study, Dickeya zeae and S. maltophilia strains were simultaneously isolated from soft rot leaves of Clivia miniata in Guangzhou, China, and were both demonstrated to be pathogenic to the host. Compared with the D. zeae strains, S. maltophilia strains propagated faster for greater growth in lysogeny broth medium and produced no cellulases or polygalacturonases, but did produce more proteases and fewer extracellular polysaccharides. Furthermore, S. maltophilia strains swam and swarmed dramatically less on semisolid media, but formed a great many more biofilms. Both D. zeae and S. maltophilia strains isolated from clivia caused rot symptoms on other monocot hosts, but not on dicots. Similar to previously reported S. maltophilia strains isolated from other sources, the strain JZL8 survived under many antibiotic stresses. The complete genome sequence of S. maltophilia strain JZL8 consists of a chromosome of 4,635,432 bp without a plasmid. Pan-genome analysis of JZL8 and 180 other S. maltophilia strains identified 50 genes that are unique to JZL8, seven of which implicate JZL8 as the potential pathogen contributor in plants. JZL8 also contains three copies of Type I Secretion System machinery; this is likely responsible for its greater production of proteases. Findings from this study extend our knowledge on the host range of S. maltophilia and provide insight into the phenotypic and genetic features underlying the plant pathogenicity of JZL8.
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Affiliation(s)
- Ming Hu
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou 510642, China
| | - Chuhao Li
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou 510642, China
| | - Yang Xue
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou 510642, China
| | - Anqun Hu
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou 510642, China
| | - Shanshan Chen
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou 510642, China
| | - Yufan Chen
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou 510642, China
| | - Guangtao Lu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Life Science and Technology, Guangxi University, Nanning 530004, China
| | - Xiaofan Zhou
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou 510642, China
| | - Jianuan Zhou
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou 510642, China
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Genetic factors related to the widespread dissemination of ST11 extensively drug-resistant carbapenemase-producing Klebsiella pneumoniae strains within hospital. Chin Med J (Engl) 2021; 133:2573-2585. [PMID: 32969865 PMCID: PMC7722564 DOI: 10.1097/cm9.0000000000001101] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Background Carbapenemase-producing Klebsiella pneumoniae (CP-Kp) poses distinct clinical challenges due to extensively drug resistant (XDR) phenotype, and sequence type (ST) 11 is the most dominant blaKPC-2-bearing CP-Kp clone in China. The purpose of this current retrospective study was to explore the genetic factors associated with the success of XDR CP-Kp ST11 strains circulated in the intensive care unit (ICU) of a Chinese tertiary hospital. Methods Six ST11 XDR CP-Kp strains were identified between May and December 2014 and validated by minimum inhibitory concentration examination, polymerase chain reaction, and pyrosequencing. The six ST11 XDR CP-Kp, as well as three multi-drug resistant (MDR) and four susceptible strains, were sequenced using single-molecule real-time method. Comprehensively structural and functional analysis based on comparative genomics was performed to identify genomic characteristics of the XDR ST11 CP-Kp strains. Results We found that ST11 XDR blaKPC-2-bearing CP-Kp strains isolated from inpatients spread in the ICU of the hospital. Functionally, genes associated with information storage and processing of the ST11 XDR CP-Kp strains were more abundant than those of MDR and susceptible strains, especially genes correlative with mobile genetic elements (MGEs) such as transposons and prophages. Structurally, eleven large-scale genetic regions taken for the unique genome in these ST11 XDR CP-Kp strains were identified as MGEs including transposons, integrons, prophages, genomic islands, and integrative and conjugative elements. Three of them were located on plasmids and eight on chromosomes; five of them were with antimicrobial resistance genes and eight with adaptation associated genes. Notably, a new blaKPC-2-bearing ΔΔTn1721-blaKPC-2 transposon, probably transposed and truncated from ΔTn1721-blaKPC-2 by IS903D and ISKpn8, was identified in all six ST11 XDR CP-Kp strains. Conclusion Our findings suggested that together with clonal spread, MGEs identified uniquely in the ST11 XDR CP-Kp strains might contribute to their formidable adaptability, which facilitated their widespread dissemination in hospital.
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Zandonadi FS, Ferreira SP, Alexandrino AV, Carnielli CM, Artier J, Barcelos MP, Nicolela NCS, Prieto EL, Goto LS, Belasque J, Novo-Mansur MTM. Periplasm-enriched fractions from Xanthomonas citri subsp. citri type A and X. fuscans subsp. aurantifolii type B present distinct proteomic profiles under in vitro pathogenicity induction. PLoS One 2020; 15:e0243867. [PMID: 33338036 PMCID: PMC7748154 DOI: 10.1371/journal.pone.0243867] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 11/29/2020] [Indexed: 12/24/2022] Open
Abstract
The causative agent of Asiatic citrus canker, the Gram-negative bacterium Xanthomonas citri subsp. citri (XAC), produces more severe symptoms and attacks a larger number of citric hosts than Xanthomonas fuscans subsp. aurantifolii XauB and XauC, the causative agents of cancrosis, a milder form of the disease. Here we report a comparative proteomic analysis of periplasmic-enriched fractions of XAC and XauB in XAM-M, a pathogenicity- inducing culture medium, for identification of differential proteins. Proteins were resolved by two-dimensional electrophoresis combined with liquid chromatography-mass spectrometry. Among the 12 proteins identified from the 4 unique spots from XAC in XAM-M (p<0.05) were phosphoglucomutase (PGM), enolase, xylose isomerase (XI), transglycosylase, NAD(P)H-dependent glycerol 3-phosphate dehydrogenase, succinyl-CoA synthetase β subunit, 6-phosphogluconate dehydrogenase, and conserved hypothetical proteins XAC0901 and XAC0223; most of them were not detected as differential for XAC when both bacteria were grown in NB medium, a pathogenicity non-inducing medium. XauB showed a very different profile from XAC in XAM-M, presenting 29 unique spots containing proteins related to a great diversity of metabolic pathways. Preponderant expression of PGM and XI in XAC was validated by Western Blot analysis in the periplasmic-enriched fractions of both bacteria. This work shows remarkable differences between the periplasmic-enriched proteomes of XAC and XauB, bacteria that cause symptoms with distinct degrees of severity during citrus infection. The results suggest that some proteins identified in XAC can have an important role in XAC pathogenicity.
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Affiliation(s)
- Flávia S. Zandonadi
- Laboratório de Bioquímica e Biologia Molecular Aplicada, Departamento de Genética e Evolução, Universidade Federal de São Carlos, UFSCar, São Carlos, São Paulo, Brazil
| | - Sílvia P. Ferreira
- Laboratório de Bioquímica e Biologia Molecular Aplicada, Departamento de Genética e Evolução, Universidade Federal de São Carlos, UFSCar, São Carlos, São Paulo, Brazil
| | - André V. Alexandrino
- Laboratório de Bioquímica e Biologia Molecular Aplicada, Departamento de Genética e Evolução, Universidade Federal de São Carlos, UFSCar, São Carlos, São Paulo, Brazil
| | - Carolina M. Carnielli
- Laboratório de Bioquímica e Biologia Molecular Aplicada, Departamento de Genética e Evolução, Universidade Federal de São Carlos, UFSCar, São Carlos, São Paulo, Brazil
| | - Juliana Artier
- Laboratório de Bioquímica e Biologia Molecular Aplicada, Departamento de Genética e Evolução, Universidade Federal de São Carlos, UFSCar, São Carlos, São Paulo, Brazil
| | - Mariana P. Barcelos
- Laboratório de Bioquímica e Biologia Molecular Aplicada, Departamento de Genética e Evolução, Universidade Federal de São Carlos, UFSCar, São Carlos, São Paulo, Brazil
| | - Nicole C. S. Nicolela
- Laboratório de Bioquímica e Biologia Molecular Aplicada, Departamento de Genética e Evolução, Universidade Federal de São Carlos, UFSCar, São Carlos, São Paulo, Brazil
| | - Evandro L. Prieto
- Laboratório de Bioquímica e Biologia Molecular Aplicada, Departamento de Genética e Evolução, Universidade Federal de São Carlos, UFSCar, São Carlos, São Paulo, Brazil
| | - Leandro S. Goto
- Laboratório de Bioquímica e Biologia Molecular Aplicada, Departamento de Genética e Evolução, Universidade Federal de São Carlos, UFSCar, São Carlos, São Paulo, Brazil
| | - José Belasque
- Departamento de Fitopatologia e Nematologia, Escola Superior de Agricultura “Luiz de Queiroz”, Universidade de São Paulo, USP, Piracicaba, São Paulo, Brazil
| | - Maria Teresa Marques Novo-Mansur
- Laboratório de Bioquímica e Biologia Molecular Aplicada, Departamento de Genética e Evolução, Universidade Federal de São Carlos, UFSCar, São Carlos, São Paulo, Brazil
- * E-mail:
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10
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Li T, Wu Y, Wang Y, Gao H, Gupta VK, Duan X, Qu H, Jiang Y. Secretome Profiling Reveals Virulence-Associated Proteins of Fusarium proliferatum during Interaction with Banana Fruit. Biomolecules 2019; 9:biom9060246. [PMID: 31234604 PMCID: PMC6628180 DOI: 10.3390/biom9060246] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 06/19/2019] [Accepted: 06/22/2019] [Indexed: 12/12/2022] Open
Abstract
Secreted proteins are vital for the pathogenicity of many fungi through manipulating their hosts for efficient colonization. Fusarium proliferatum is a phytopathogenic fungus infecting many crops, vegetables, and fruit, including banana fruit. To access the proteins involved in pathogen–host interaction, we used label-free quantitative proteomics technology to comparatively analyze the secretomes of F. proliferatum cultured with and without banana peel in Czapek’s broth medium. By analyzing the secretomes of F. proliferatum, we have identified 105 proteins with 40 exclusively secreted and 65 increased in abundance in response to a banana peel. These proteins were involved in the promotion of invasion of banana fruit, and they were mainly categorized into virulence factors, cell wall degradation, metabolic process, response to stress, regulation, and another unknown biological process. The expressions of corresponding genes confirmed the existence of these secreted proteins in the banana peel. Furthermore, expression pattern suggested variable roles for these genes at different infection stages. This study expanded the current database of F. proliferatum secreted proteins which might be involved in the infection strategy of this fungus. Additionally, this study warranted the further attention of some secreted proteins that might initiate infection of F. proliferatum on banana fruit.
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Affiliation(s)
- Taotao Li
- Key Laboratory of Plant Resource Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China.
| | - Yu Wu
- Key Laboratory of Plant Resource Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China.
- University of Chinese Academy of Sciences, Beijing 100039, China.
| | - Yong Wang
- Zhongshan Entry-Exit Inspection and Quarantine Bureau, Zhongshan 528403, China.
| | - Haiyan Gao
- Key Laboratory of Post-Harvest Handling of Fruits, Ministry of Agriculture, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China.
| | - Vijai Kumar Gupta
- Department of Chemistry and Biotechnology, ERA Chair of Green Chemistry, Tallinn University of Technology, 12618 Tallinn, Estonia.
| | - Xuewu Duan
- Key Laboratory of Plant Resource Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China.
| | - Hongxia Qu
- Key Laboratory of Plant Resource Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China.
| | - Yueming Jiang
- Key Laboratory of Plant Resource Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China.
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11
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Cabrejos DAL, Alexandrino AV, Pereira CM, Mendonça DC, Pereira HD, Novo-Mansur MTM, Garratt RC, Goto LS. Structural characterization of a pathogenicity-related superoxide dismutase codified by a probably essential gene in Xanthomonas citri subsp. citri. PLoS One 2019; 14:e0209988. [PMID: 30615696 PMCID: PMC6322740 DOI: 10.1371/journal.pone.0209988] [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: 05/28/2018] [Accepted: 12/14/2018] [Indexed: 11/24/2022] Open
Abstract
Citrus canker is a plant disease caused by the bacteria Xanthomonas citri subsp. citri that affects all domestic varieties of citrus. Some annotated genes from the X. citri subsp. citri genome are assigned to an interesting class named "pathogenicity, virulence and adaptation". Amongst these is sodM, which encodes for the gene product XcSOD, one of four superoxide dismutase homologs predicted from the genome. SODs are widespread enzymes that play roles in the oxidative stress response, catalyzing the degradation of the deleterious superoxide radical. In Xanthomonas, SOD has been associated with pathogenesis as a counter measure against the plant defense response. In this work we initially present the 1.8 Å crystal structure of XcSOD, a manganese containing superoxide dismutase from Xanthomonas citri subsp. citri. The structure bears all the hallmarks of a dimeric member of the MnSOD family, including the conserved hydrogen-bonding network residues. Despite the apparent gene redundancy, several attempts to obtain a sodM deletion mutant were unsuccessful, suggesting the encoded protein to be essential for bacterial survival. This intriguing observation led us to extend our structural studies to the remaining three SOD homologs, for which comparative models were built. The models imply that X. citri subsp. citri produces an iron-containing SOD which is unlikely to be catalytically active along with two conventional Cu,ZnSODs. Although the latter are expected to possess catalytic activity, we propose they may not be able to replace XcSOD for reasons such as distinct subcellular compartmentalization or differential gene expression in pathogenicity-inducing conditions.
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Affiliation(s)
- Diego Antonio Leonardo Cabrejos
- Laboratório de Biologia Estrutural, Grupo de Cristalografia, Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos, SP, Brazil
| | - André Vessoni Alexandrino
- Laboratório de Bioquímica e Biologia Molecular Aplicada—LBBMA, Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos, SP, Brazil
| | - Camila Malvessi Pereira
- Laboratório de Bioquímica e Biologia Molecular Aplicada—LBBMA, Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos, SP, Brazil
| | - Deborah Cezar Mendonça
- Laboratório de Biologia Estrutural, Grupo de Cristalografia, Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos, SP, Brazil
| | - Humberto D'Muniz Pereira
- Laboratório de Biologia Estrutural, Grupo de Cristalografia, Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos, SP, Brazil
| | - Maria Teresa Marques Novo-Mansur
- Laboratório de Bioquímica e Biologia Molecular Aplicada—LBBMA, Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos, SP, Brazil
| | - Richard Charles Garratt
- Laboratório de Biologia Estrutural, Grupo de Cristalografia, Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos, SP, Brazil
| | - Leandro Seiji Goto
- Laboratório de Bioquímica e Biologia Molecular Aplicada—LBBMA, Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos, SP, Brazil
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12
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Strodtman KN, Stevenson SE, Waters JK, Mawhinney TP, Thelen JJ, Polacco JC, Emerich DW. The Bacteroid Periplasm in Soybean Nodules Is an Interkingdom Symbiotic Space. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2017; 30:997-1008. [PMID: 29028412 DOI: 10.1094/mpmi-12-16-0264-r] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The functional role of the periplasm of nitrogen-fixing bacteroids has not been determined. Proteins were isolated from the periplasm and cytoplasm of Bradyrhizobium diazoefficiens bacteroids and were analyzed using liquid chromatography tandem mass spectrometry proteomics. Identification of bacteroid periplasmic proteins was aided by periplasm prediction programs. Approximately 40% of all the proteins identified as periplasmic in the B. diazoefficiens genome were found expressed in the bacteroid form of the bacteria, indicating the periplasm is a metabolically active symbiotic space. The bacteroid periplasm possesses many fatty acid metabolic enzymes, which was in contrast to the bacteroid cytoplasm. Amino acid analysis of the periplasm revealed an abundance of phosphoserine, phosphoethanolamine, and glycine, which are metabolites of phospholipid metabolism. These results suggest the periplasm is a unique space and not a continuum with the peribacteroid space. A number of plant proteins were found in the periplasm fraction, which suggested contamination. However, antibodies to two of the identified plant proteins, histone H2A and lipoxygenase, yielded immunogold labeling that demonstrated the plant proteins were specifically targeted to the bacteroids. This suggests that the periplasm is an interkingdom symbiotic space containing proteins from both the bacteroid and the plant.
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Affiliation(s)
- Kent N Strodtman
- Department of Biochemistry, University of Missouri, Columbia, MO 65211, U.S.A
| | - Severin E Stevenson
- Department of Biochemistry, University of Missouri, Columbia, MO 65211, U.S.A
| | - James K Waters
- Department of Biochemistry, University of Missouri, Columbia, MO 65211, U.S.A
| | - Thomas P Mawhinney
- Department of Biochemistry, University of Missouri, Columbia, MO 65211, U.S.A
| | - Jay J Thelen
- Department of Biochemistry, University of Missouri, Columbia, MO 65211, U.S.A
| | - Joseph C Polacco
- Department of Biochemistry, University of Missouri, Columbia, MO 65211, U.S.A
| | - David W Emerich
- Department of Biochemistry, University of Missouri, Columbia, MO 65211, U.S.A
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