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Crystal Structures of the Burkholderia Multivorans Hopanoid Transporter Hpnn
Crystal structures of the Burkholderia multivorans hopanoid transporter HpnN Nitin Kumara,1, Chih-Chia Sub,1, Tsung-Han Choub, Abhijith Radhakrishnana, Jared A. Delmarb, Kanagalaghatta R. Rajashankarc,d, and Edward W. Yua,b,2 aDepartment of Chemistry, Iowa State University, Ames, IA 50011; bDepartment of Physics and Astronomy, Iowa State University, IA 50011; cNortheastern Collaborative Access Team, Argonne National Laboratory, Argonne, IL 60439; and dDepartment of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14850 Edited by Eric Gouaux, Oregon Health and Science University, Portland, OR, and approved May 15, 2017 (received for review November 30, 2016) Strains of the Burkholderia cepacia complex (Bcc) are Gram-negative critical line of defense against antimicrobial agents in Burkholderia opportunisitic bacteria that are capable of causing serious diseases, species is the permeability barrier of the outer membrane. Most of mainly in immunocompromised individuals. Bcc pathogens are in- these species contain a modified lipopolysaccharide, which results in trinsically resistant to multiple antibiotics, including β-lactams, ami- polymyxin resistance (13). In addition, the permeability of the major noglycosides, fluoroquinolones, and polymyxins. They are major outer membrane porin channel Omp38 appears to be low for an- pathogens in patients with cystic fibrosis (CF) and can cause severe tibiotics (14). The presence of a large number of multidrug efflux necrotizing pneumonia, which is often fatal. Hopanoid biosynthesis pumps, belonging to the resistance-nodulation-cell division (RND) is one of the major mechanisms involved in multiple antimicrobial superfamily, also plays a major role in the intrinsic resistance to a resistance of Bcc pathogens. The hpnN gene of B. -
Burkholderia Cenocepacia Integrates Cis-2-Dodecenoic Acid and Cyclic Dimeric Guanosine Monophosphate Signals to Control Virulence
Burkholderia cenocepacia integrates cis-2-dodecenoic acid and cyclic dimeric guanosine monophosphate signals to control virulence Chunxi Yanga,b,c,d,1, Chaoyu Cuia,b,c,1, Qiumian Yea,b, Jinhong Kane, Shuna Fua,b, Shihao Songa,b, Yutong Huanga,b, Fei Hec, Lian-Hui Zhanga,c, Yantao Jiaf, Yong-Gui Gaod, Caroline S. Harwoodb,g,2, and Yinyue Denga,b,c,2 aState Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China; bGuangdong Innovative Research Team of Sociomicrobiology, College of Agriculture, South China Agricultural University, Guangzhou 510642, China; cIntegrative Microbiology Research Centre, South China Agricultural University, Guangzhou 510642, China; dSchool of Biological Sciences, Nanyang Technological University, Singapore 637551; eCenter for Crop Germplasm Resources, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China; fState Key Laboratory of Plant Genomics, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; and gDepartment of Microbiology, University of Washington, Seattle, WA 98195 Contributed by Caroline S. Harwood, October 30, 2017 (sent for review June 1, 2017; reviewed by Maxwell J. Dow and Tim Tolker-Nielsen) Quorum sensing (QS) signals are used by bacteria to regulate N-octanoyl homoserine lactone (C8-HSL). The two QS systems biological functions in response to cell population densities. Cyclic have both distinct and overlapping effects on gene expression diguanosine monophosphate (c-di-GMP) regulates cell functions in (16, 17). response to diverse environmental chemical and physical signals One of the ways in which QS systems can act is by controlling that bacteria perceive. In Burkholderia cenocepacia, the QS signal levels of intracellular cyclic diguanosine monophosphate (c-di-GMP) receptor RpfR degrades intracellular c-di-GMP when it senses the in bacteria (18–21). -
Burkholderia Cenocepacia Intracellular Activation of the Pyrin
Activation of the Pyrin Inflammasome by Intracellular Burkholderia cenocepacia Mikhail A. Gavrilin, Dalia H. A. Abdelaziz, Mahmoud Mostafa, Basant A. Abdulrahman, Jaykumar Grandhi, This information is current as Anwari Akhter, Arwa Abu Khweek, Daniel F. Aubert, of September 29, 2021. Miguel A. Valvano, Mark D. Wewers and Amal O. Amer J Immunol 2012; 188:3469-3477; Prepublished online 24 February 2012; doi: 10.4049/jimmunol.1102272 Downloaded from http://www.jimmunol.org/content/188/7/3469 Supplementary http://www.jimmunol.org/content/suppl/2012/02/24/jimmunol.110227 Material 2.DC1 http://www.jimmunol.org/ References This article cites 71 articles, 17 of which you can access for free at: http://www.jimmunol.org/content/188/7/3469.full#ref-list-1 Why The JI? Submit online. • Rapid Reviews! 30 days* from submission to initial decision by guest on September 29, 2021 • No Triage! Every submission reviewed by practicing scientists • Fast Publication! 4 weeks from acceptance to publication *average Subscription Information about subscribing to The Journal of Immunology is online at: http://jimmunol.org/subscription Permissions Submit copyright permission requests at: http://www.aai.org/About/Publications/JI/copyright.html Email Alerts Receive free email-alerts when new articles cite this article. Sign up at: http://jimmunol.org/alerts The Journal of Immunology is published twice each month by The American Association of Immunologists, Inc., 1451 Rockville Pike, Suite 650, Rockville, MD 20852 Copyright © 2012 by The American Association of Immunologists, Inc. All rights reserved. Print ISSN: 0022-1767 Online ISSN: 1550-6606. The Journal of Immunology Activation of the Pyrin Inflammasome by Intracellular Burkholderia cenocepacia Mikhail A. -
Genomic Plasticity of the Causative Agent of Melioidosis, Burkholderia Pseudomallei
Genomic plasticity of the causative agent of melioidosis, Burkholderia pseudomallei Matthew T. G. Holdena, Richard W. Titballb,c, Sharon J. Peacockd,e, Ana M. Cerden˜ o-Ta´ rragaa, Timothy Atkinsb, Lisa C. Crossmana, Tyrone Pittf, Carol Churchera, Karen Mungalla, Stephen D. Bentleya, Mohammed Sebaihiaa, Nicholas R. Thomsona, Nathalie Basona, Ifor R. Beachamg, Karen Brooksa, Katherine A. Brownh, Nat F. Browng, Greg L. Challisi, Inna Cherevacha, Tracy Chillingwortha, Ann Cronina, Ben Crossetth, Paul Davisa, David DeShazerj, Theresa Feltwella, Audrey Frasera, Zahra Hancea, Heidi Hausera, Simon Holroyda, Kay Jagelsa, Karen E. Keithh, Mark Maddisona, Sharon Moulea, Claire Pricea, Michael A. Quaila, Ester Rabbinowitscha, Kim Rutherforda, Mandy Sandersa, Mark Simmondsa, Sirirurg Songsivilaik, Kim Stevensa, Sarinna Tumapae, Monkgol Vesaratchaveste, Sally Whiteheada, Corin Yeatsa, Bart G. Barrella, Petra C. F. Oystonb, and Julian Parkhilla,l aWellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge CB10 1SA, United Kingdom; bDefence Science and Technology Laboratory, Porton Down, Salisbury SP4 0JQ, United Kingdom; cDepartment of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London WC1E 7HT, United Kingdom; dNuffield Department of Clinical Medicine, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DU, United Kingdom; eFaculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand; fLaboratory of Hospital Infection, Division of Nosocomial Infection Prevention and Control, Central Public Health Laboratory, London NW9 5HT, United Kingdom; gSchool of Health Science, Griffith University, Gold Coast, Queensland 9726, Australia; hDepartment of Biological Sciences, Centre for Molecular Microbiology and Infection, Flowers Building, Imperial College, London SW7 2AZ, United Kingdom; iDepartment of Chemistry, University of Warwick, Coventry CV4 7AL, United Kingdom; jU.S. -
Characterization of Bacterial Communities Associated
www.nature.com/scientificreports OPEN Characterization of bacterial communities associated with blood‑fed and starved tropical bed bugs, Cimex hemipterus (F.) (Hemiptera): a high throughput metabarcoding analysis Li Lim & Abdul Hafz Ab Majid* With the development of new metagenomic techniques, the microbial community structure of common bed bugs, Cimex lectularius, is well‑studied, while information regarding the constituents of the bacterial communities associated with tropical bed bugs, Cimex hemipterus, is lacking. In this study, the bacteria communities in the blood‑fed and starved tropical bed bugs were analysed and characterized by amplifying the v3‑v4 hypervariable region of the 16S rRNA gene region, followed by MiSeq Illumina sequencing. Across all samples, Proteobacteria made up more than 99% of the microbial community. An alpha‑proteobacterium Wolbachia and gamma‑proteobacterium, including Dickeya chrysanthemi and Pseudomonas, were the dominant OTUs at the genus level. Although the dominant OTUs of bacterial communities of blood‑fed and starved bed bugs were the same, bacterial genera present in lower numbers were varied. The bacteria load in starved bed bugs was also higher than blood‑fed bed bugs. Cimex hemipterus Fabricus (Hemiptera), also known as tropical bed bugs, is an obligate blood-feeding insect throughout their entire developmental cycle, has made a recent resurgence probably due to increased worldwide travel, climate change, and resistance to insecticides1–3. Distribution of tropical bed bugs is inclined to tropical regions, and infestation usually occurs in human dwellings such as dormitories and hotels 1,2. Bed bugs are a nuisance pest to humans as people that are bitten by this insect may experience allergic reactions, iron defciency, and secondary bacterial infection from bite sores4,5. -
Characterization of the Burkholderia Cenocepacia J2315 Surface-Exposed Immunoproteome
Article Characterization of the Burkholderia cenocepacia J2315 Surface-Exposed Immunoproteome 1, 1, 1, Sílvia A. Sousa * , António M.M. Seixas y , Manoj Mandal y, Manuel J. Rodríguez-Ortega 2 and Jorge H. Leitão 1,* 1 iBB–Institute for Bioengineering and Biosciences, 1049-001 Lisbon, Portugal; [email protected] (A.M.M.S.); [email protected] (M.M.) 2 Departament of Biochemistry and Molecular Biology, Córdoba University, 14071 Córdoba, Spain; [email protected] * Correspondence: [email protected] (S.A.S.); [email protected] (J.H.L.); Tel.: +351-2184-19986 (S.A.S.); +351-2184-17688 (J.H.L.) Both authors contributed equally to the work. y Received: 31 July 2020; Accepted: 3 September 2020; Published: 6 September 2020 Abstract: Infections by the Burkholderia cepacia complex (Bcc) remain seriously life threatening to cystic fibrosis (CF) patients, and no effective eradication is available. A vaccine to protect patients against Bcc infections is a highly attractive therapeutic option, but none is available. A strategy combining the bioinformatics identification of putative surface-exposed proteins with an experimental approach encompassing the “shaving” of surface-exposed proteins with trypsin followed by peptide identification by liquid chromatography and mass spectrometry is here reported. The methodology allowed the bioinformatics identification of 263 potentially surface-exposed proteins, 16 of them also experimentally identified by the “shaving” approach. Of the proteins identified, 143 have a high probability of containing B-cell epitopes that are surface-exposed. The immunogenicity of three of these proteins was demonstrated using serum samples from Bcc-infected CF patients and Western blotting, validating the usefulness of this methodology in identifying potentially immunogenic surface-exposed proteins that might be used for the development of Bcc-protective vaccines. -
Draft Genome of a Heavy-Metal-Resistant Bacterium, Cupriavidus Sp
Korean Journal of Microbiology (2020) Vol. 56, No. 3, pp. 343-346 pISSN 0440-2413 DOI https://doi.org/10.7845/kjm.2020.0061 eISSN 2383-9902 Copyright ⓒ 2020, The Microbiological Society of Korea Draft genome of a heavy-metal-resistant bacterium, Cupriavidus sp. strain SW-Y-13, isolated from river water in Korea Kiwoon Baek , Young Ho Nam , Eu Jin Chung , and Ahyoung Choi* Nakdonggang National Institute of Biological Resources (NNIBR), Sangju 37242, Republic of Korea 강물에서 분리한 중금속 내성 세균 Cupriavidus sp. SW-Y-13 균주의 유전체 해독 백기운 ・ 남영호 ・ 정유진 ・ 최아영* 국립낙동강생물자원관 담수생물연구본부 (Received July 6, 2020; Revised September 18, 2020; Accepted September 18, 2020) Cupriavidus sp. strain SW-Y-13 is an aerobic, Gram-negative, found to survive in close association with pollution-causing rod-shaped bacterium isolated from river water in South Korea, heavy metals, for example, Cupriavidus metallidurans, which in 2019. Its draft genome was produced using the PacBio RS II successfully grows in the presence of Cu, Hg, Ni, Ag, Cd, Co, platform and is thought to consist of five circular chromosomes Zn, and As (Goris et al., 2001; Vandamme and Coenye, 2004; with a total of 7,307,793 bp. The genome has a G + C content Janssen et al., 2010). Several bacteria found in polluted of 63.1%. Based on 16S rRNA sequence similarity, strain SW-Y-13 is most closely related to Cupriavidus metallidurans environments have been shown to adapt to the presence of toxic (98.4%). Genome annotation revealed that the genome is heavy metals. Identification of novel bacterial mechanisms comprised of 6,613 genes, 6,536 CDSs, 12 rRNAs, 61 tRNAs, facilitating growth in heavy-metal-polluted environments and 4 ncRNAs. -
Targeting the Burkholderia Cepacia Complex
viruses Review Advances in Phage Therapy: Targeting the Burkholderia cepacia Complex Philip Lauman and Jonathan J. Dennis * Department of Biological Sciences, University of Alberta, Edmonton, AB T6G 2E9, Canada; [email protected] * Correspondence: [email protected]; Tel.: +1-780-492-2529 Abstract: The increasing prevalence and worldwide distribution of multidrug-resistant bacterial pathogens is an imminent danger to public health and threatens virtually all aspects of modern medicine. Particularly concerning, yet insufficiently addressed, are the members of the Burkholderia cepacia complex (Bcc), a group of at least twenty opportunistic, hospital-transmitted, and notoriously drug-resistant species, which infect and cause morbidity in patients who are immunocompromised and those afflicted with chronic illnesses, including cystic fibrosis (CF) and chronic granulomatous disease (CGD). One potential solution to the antimicrobial resistance crisis is phage therapy—the use of phages for the treatment of bacterial infections. Although phage therapy has a long and somewhat checkered history, an impressive volume of modern research has been amassed in the past decades to show that when applied through specific, scientifically supported treatment strategies, phage therapy is highly efficacious and is a promising avenue against drug-resistant and difficult-to-treat pathogens, such as the Bcc. In this review, we discuss the clinical significance of the Bcc, the advantages of phage therapy, and the theoretical and clinical advancements made in phage therapy in general over the past decades, and apply these concepts specifically to the nascent, but growing and rapidly developing, field of Bcc phage therapy. Keywords: Burkholderia cepacia complex (Bcc); bacteria; pathogenesis; antibiotic resistance; bacterio- phages; phages; phage therapy; phage therapy treatment strategies; Bcc phage therapy Citation: Lauman, P.; Dennis, J.J. -
Host–Symbiont Specificity Determined by Microbe–Microbe Competition in an Insect
Host–symbiont specificity determined by microbe– microbe competition in an insect gut Hideomi Itoha,1, Seonghan Jangb,1, Kazutaka Takeshitac, Tsubasa Ohbayashid, Naomi Ohnishie,2, Xian-Ying Mengf, Yasuo Mitania, and Yoshitomo Kikuchia,b,g,3 aBioproduction Research Institute, National Institute of Advanced Industrial Science and Technology, Hokkaido Center, 062-8517 Sapporo, Japan; bGraduate School of Agriculture, Hokkaido University, 060-8589 Sapporo, Japan; cFaculty of Bioresource Sciences, Akita Prefectural University, 010-0195 Akita, Japan; dInstitute for Integrative Biology of the Cell, UMR 9198, CNRS, Commissariat à l’Energie Atomique et aux Énergies Alternatives (CEA), Université Paris-Sud, 91198 Gif-sur-Yvette, France; eResearch Center for Zoonosis Control, Hokkaido University, 001-0020 Sapporo, Japan; fBioproduction Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba Center, 305-8566 Tsukuba, Japan; and gComputational Bio Big Data Open Innovation Laboratory, National Institute of Advanced Industrial Science and Technology, 062-8517 Sapporo, Japan Edited by Joan E. Strassmann, Washington University in St. Louis, St. Louis, MO, and approved September 30, 2019 (received for review July 18, 2019) Despite the omnipresence of specific host–symbiont associations microbe competition on the evolution and stabilization of host– with acquisition of the microbial symbiont from the environment, symbiont specificity is very scarce. little is known about how the specificity of the interaction evolved The bean bug Riptortus pedestris (Heteroptera: Alydidae) is and is maintained. The bean bug Riptortus pedestris acquires a associated with a Burkholderia symbiont that is confined in specific bacterial symbiont of the genus Burkholderia from environ- symbiosis-specific crypts located in the posterior midgut region Burkholderia mental soil and harbors it in midgut crypts. -
Broad-Spectrum Antimicrobial Activity by Burkholderia Cenocepacia Tatl-371, a Strain Isolated from the Tomato Rhizosphere
RESEARCH ARTICLE Rojas-Rojas et al., Microbiology DOI 10.1099/mic.0.000675 Broad-spectrum antimicrobial activity by Burkholderia cenocepacia TAtl-371, a strain isolated from the tomato rhizosphere Fernando Uriel Rojas-Rojas,1 Anuar Salazar-Gómez,1 María Elena Vargas-Díaz,1 María Soledad Vasquez-Murrieta, 1 Ann M. Hirsch,2,3 Rene De Mot,4 Maarten G. K. Ghequire,4 J. Antonio Ibarra1,* and Paulina Estrada-de los Santos1,* Abstract The Burkholderia cepacia complex (Bcc) comprises a group of 24 species, many of which are opportunistic pathogens of immunocompromised patients and also are widely distributed in agricultural soils. Several Bcc strains synthesize strain- specific antagonistic compounds. In this study, the broad killing activity of B. cenocepacia TAtl-371, a Bcc strain isolated from the tomato rhizosphere, was characterized. This strain exhibits a remarkable antagonism against bacteria, yeast and fungi including other Bcc strains, multidrug-resistant human pathogens and plant pathogens. Genome analysis of strain TAtl-371 revealed several genes involved in the production of antagonistic compounds: siderophores, bacteriocins and hydrolytic enzymes. In pursuit of these activities, we observed growth inhibition of Candida glabrata and Paraburkholderia phenazinium that was dependent on the iron concentration in the medium, suggesting the involvement of siderophores. This strain also produces a previously described lectin-like bacteriocin (LlpA88) and here this was shown to inhibit only Bcc strains but no other bacteria. Moreover, a compound with an m/z 391.2845 with antagonistic activity against Tatumella terrea SHS 2008T was isolated from the TAtl-371 culture supernatant. This strain also contains a phage-tail-like bacteriocin (tailocin) and two chitinases, but the activity of these compounds was not detected. -
Reclassification of Four Polynucleobacter Necessarius Strains As Representatives of Polynucleobacter Asymbioticus Comb. Nov., Polynucleobacter Duraquae Sp
International Journal of Systematic and Evolutionary Microbiology (2016), 66, 2883–2892 DOI 10.1099/ijsem.0.001073 Reclassification of four Polynucleobacter necessarius strains as representatives of Polynucleobacter asymbioticus comb. nov., Polynucleobacter duraquae sp. nov., Polynucleobacter yangtzensis sp. nov. and Polynucleobacter sinensis sp. nov., and emended description of Polynucleobacter necessarius Martin W. Hahn,1 Johanna Schmidt,1 Alexandra Pitt,1 Sami J. Taipale2 and Elke Lang3 Correspondence 1Research Institute for Limnology, University of Innsbruck, Mondseestrasse 9, A-5310 Mondsee, Martin W. Hahn Austria [email protected] 2Lammi Biological Station, University of Helsinki, Pa€aj€ arventie€ 320, 16900 Lammi, Finland 3Leibniz Institut DSMZ-Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH, Inhoffenstraße 7B, D-38124 Braunschweig, Germany Genome comparisons based on average nucleotide identity (ANI) values of four strains currently classified as Polynucleobacter necessarius subsp. asymbioticus resulted in ANI values of 75.7– 78.4 %, suggesting that each of those strains represents a separate species. The species P. necessarius was proposed by Heckmann and Schmidt in 1987 to accommodate obligate endosymbionts of ciliates affiliated with the genus Euplotes. The required revision of this species is, however, hampered by the fact, that this species is based only on a description and lacks a type strain available as pure culture. Furthermore, the ciliate culture Euplotes aediculatus ATCC 30859, on which the description of the species was based, is no longer available. We found another Euplotes aediculatus culture (Ammermann) sharing the same origin with ATCC 30859 and proved the identity of the endosymbionts contained in the two cultures. A multilocus sequence comparison approach was used to estimate if the four strains currently classified as Polynucleobacter necessarius subsp. -
Case Report Undiagnosed Chronic Granulomatous Disease, Burkholderia Cepacia Complex Pneumonia, and Acquired Hemophagocytic Lymphohistiocytosis: a Deadly Association
Hindawi Publishing Corporation Case Reports in Pulmonology Volume 2013, Article ID 874197, 5 pages http://dx.doi.org/10.1155/2013/874197 Case Report Undiagnosed Chronic Granulomatous Disease, Burkholderia cepacia complex Pneumonia, and Acquired Hemophagocytic Lymphohistiocytosis: A Deadly Association Maxime Maignan,1 Colin Verdant,2,3 Guillaume F. Bouvet,1 Michael Van Spall,4 and Yves Berthiaume1,2,5 1 Institut de Recherches Cliniques de Montreal,´ UniversitedeMontr´ eal,´ Montreal,QC,CanadaH2W1R7´ 2 Departement´ de Medecine,´ UniversitedeMontr´ eal,´ Montreal,´ QC, Canada H3T 1J4 3 Departement´ de Medecine,´ Hopitalˆ SacreCœur,Universit´ edeMontr´ eal,´ Montreal,´ QC, Canada H4J 1C5 4 Centre de Recherche du Centre hospitalier de l’UniversitedeMontr´ eal,´ Montreal,QC,CanadaH2W1T8´ 5 Service de Pneumologie, Centre Hospitalier de l’UniversitedeMontr´ eal,´ Montreal,QC,CanadaH2W1T8´ Correspondence should be addressed to Yves Berthiaume; [email protected] Received 28 June 2013; Accepted 24 July 2013 Academic Editors: T. Peros-Golubicic and R. Vender Copyright © 2013 Maxime Maignan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Background. Chronic granulomatous disease is a rare inherited disorder of the phagocyte nicotinamide adenine dinucleotide phosphate (NADPH) oxidase. The clinical course of the disease is marked by recurrent infections, including Burkholderia cepacia complex infection. Case Report. Here we report the case of a 21-year-old male hospitalized for a Burkholderia cepacia complex pneumonia. Despite the broad spectrum antibiotic treatment, fever continued and patient’s condition worsened. Anemia and thrombocytopenia developed together with hypofibrinogenemia.