Marine Biotechnology
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Nor Hawani Salikin
Characterisation of a novel antinematode agent produced by the marine epiphytic bacterium Pseudoalteromonas tunicata and its impact on Caenorhabditis elegans Nor Hawani Salikin A thesis in fulfilment of the requirements for the degree of Doctor of Philosophy School of Biological, Earth and Environmental Sciences Faculty of Science August 2020 Thesis/Dissertation Sheet Surname/Family Name : Salikin Given Name/s : Nor Hawani Abbreviation for degree as give in the University : Ph.D. calendar Faculty : UNSW Faculty of Science School : School of Biological, Earth and Environmental Sciences Characterisation of a novel antinematode agent produced Thesis Title : by the marine epiphytic bacterium Pseudoalteromonas tunicata and its impact on Caenorhabditis elegans Abstract 350 words maximum: (PLEASE TYPE) Drug resistance among parasitic nematodes has resulted in an urgent need for the development of new therapies. However, the high re-discovery rate of antinematode compounds from terrestrial environments necessitates a new repository for future drug research. Marine epiphytic bacteria are hypothesised to produce nematicidal compounds as a defence against bacterivorous predators, thus representing a promising, yet underexplored source for antinematode drug discovery. The marine epiphytic bacterium Pseudoalteromonas tunicata is known to produce a number of bioactive compounds. Screening genomic libraries of P. tunicata against the nematode Caenorhabditis elegans identified a clone (HG8) showing fast-killing activity. However, the molecular, chemical and biological properties of HG8 remain undetermined. A novel Nematode killing protein-1 (Nkp-1) encoded by an uncharacterised gene of HG8 annotated as hp1 was successfully discovered through this project. The Nkp-1 toxicity appears to be nematode-specific, with the protein being highly toxic to nematode larvae but having no impact on nematode eggs. -
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883 | Desulfovibrio vulgaris | DvMF_2825 298701 | Desulfovibrio | DA2_3337 1121434 | Halodesulfovibrio aestuarii | AULY01000007_gene1045 207559 | Desulfovibrio alaskensis | Dde_0991 935942 | Desulfonatronum lacustre | KI912608_gene2193 159290 | Desulfonatronum | JPIK01000018_gene1259 1121448 | Desulfovibrio gigas | DGI_0655 1121445 | Desulfovibrio desulfuricans | ATUZ01000018_gene2316 525146 | Desulfovibrio desulfuricans | Ddes_0159 665942 | Desulfovibrio | HMPREF1022_02168 457398 | Desulfovibrio | HMPREF0326_00453 363253 | Lawsonia intracellularis | LI0397 882 | Desulfovibrio vulgaris | DVU_0784 1121413 | Desulfonatronovibrio hydrogenovorans | JMKT01000008_gene1463 555779 | Desulfonatronospira thiodismutans | Dthio_PD0935 690850 | Desulfovibrio africanus | Desaf_1578 643562 | Pseudodesulfovibrio aespoeensis | Daes_3115 1322246 | Pseudodesulfovibrio piezophilus | BN4_12523 641491 | Desulfovibrio desulfuricans | DND132_2573 1121440 | Desulfovibrio aminophilus | AUMA01000002_gene2198 1121456 | Desulfovibrio longus | ATVA01000018_gene290 526222 | Desulfovibrio salexigens | Desal_3460 1121451 | Desulfovibrio hydrothermalis | DESAM_21057 1121447 | Desulfovibrio frigidus | JONL01000008_gene3531 1121441 | Desulfovibrio bastinii | AUCX01000006_gene918 1121439 | Desulfovibrio alkalitolerans | dsat_0220 941449 | Desulfovibrio | dsx2_0067 1307759 | Desulfovibrio | JOMJ01000003_gene2163 1121406 | Desulfocurvus vexinensis | JAEX01000012_gene687 1304872 | Desulfovibrio magneticus | JAGC01000003_gene2904 573370 | Desulfovibrio magneticus | DMR_04750 -
Antimicrobial‐Producing Pseudoalteromonas From
Received: 26 February 2018 | Revised: 11 May 2018 | Accepted: 2 June 2018 DOI: 10.1002/jobm.201800087 RESEARCH PAPER Antimicrobial-producing Pseudoalteromonas from the marine environment of Panama shows a high phylogenetic diversity and clonal structure Librada A. Atencio1,2 | Francesco Dal Grande3 | Giannina Ow Young1 | Ronnie Gavilán1,4,5 | Héctor M. Guzmán6 | Imke Schmitt3,7 | Luis C. Mejía1,6 | Marcelino Gutiérrez1 1 Centro de Biodiversidad y Descubrimiento de Drogas, Instituto de Investigaciones Científicas y Servicios de Alta Tecnología (INDICASAT-AIP), City of Knowledge, Panama, Republic of Panama 2 Department of Biotechnology, Acharya Nagarjuna University, Guntur, India 3 Senckenberg Biodiversity and Climate Research Centre (BiK-F), Frankfurt am Main, Germany 4 National Center for Public Health, Instituto Nacional de Salud, Lima, Peru 5 Environmental Management Department, Universidad San Ignacio de Loyola, Lima, Peru 6 Smithsonian Tropical Research Institute, Ancon, Panama, Republic of Panama 7 Department of Biological Sciences, Institute of Ecology, Evolution and Diversity, Goethe Universität Frankfurt, Frankfurt, Germany Correspondence Pseudoalteromonas is a genus of marine bacteria often found in association with other Luis C. Mejía, Marcelino Gutiérrez, Centro de Biodiversidad y Descubrimiento de organisms. Although several studies have examined Pseudoalteromonas diversity and Drogas, INDICASAT-AIP, City of their antimicrobial activity, its diversity in tropical environments is largely unexplored. – Knowledge, PO 0843 01103, Panama, We investigated the diversity of Pseudoalteromonas in marine environments of Panama Republic of Panama. Email: [email protected] (L.C.M); using a multilocus phylogenetic approach. Furthermore we tested their antimicrobial [email protected] (M.G) capacity and evaluated the effect of recombination and mutation in shaping their phylogenetic relationships. -
Biotechnological Potential of Cold Adapted Pseudoalteromonas Spp
marine drugs Article Biotechnological Potential of Cold Adapted Pseudoalteromonas spp. Isolated from ‘Deep Sea’ Sponges Erik Borchert 1, Stephen Knobloch 2, Emilie Dwyer 1, Sinéad Flynn 1, Stephen A. Jackson 1, Ragnar Jóhannsson 2, Viggó T. Marteinsson 2, Fergal O’Gara 1,3,4 and Alan D. W. Dobson 1,* 1 School of Microbiology, University College Cork, National University of Ireland, Cork T12 YN60, Ireland; [email protected] (E.B.); [email protected] (E.D.); [email protected] (S.F.); [email protected] (S.A.J.); [email protected] (F.O.) 2 Department of Research and Innovation, Matís ohf., Reykjavik 113, Iceland; [email protected] (S.K.); [email protected] (R.J.); [email protected] (V.T.M.) 3 Biomerit Research Centre, University College Cork, National University of Ireland, Cork T12 YN60, Ireland 4 School of Biomedical Sciences, Curtin Health Innovation Research Institute, Curtin University, Perth 6102, WA, Australia * Correspondence: [email protected]; Tel.: +353-21-490-2743 Received: 22 February 2017; Accepted: 14 June 2017; Published: 19 June 2017 Abstract: The marine genus Pseudoalteromonas is known for its versatile biotechnological potential with respect to the production of antimicrobials and enzymes of industrial interest. We have sequenced the genomes of three Pseudoalteromonas sp. strains isolated from different deep sea sponges on the Illumina MiSeq platform. The isolates have been screened for various industrially important enzymes and comparative genomics has been applied to investigate potential relationships between the isolates and their host organisms, while comparing them to free-living Pseudoalteromonas spp. from shallow and deep sea environments. -
2011 Book Bacteriallipopolysa
Yuriy A. Knirel l Miguel A. Valvano Editors Bacterial Lipopolysaccharides Structure, Chemical Synthesis, Biogenesis and Interaction with Host Cells SpringerWienNewYork Yuriy A. Knirel Miguel A. Valvano N.D. Zelinsky Institute of Centre for Human Immunology and Organic Chemistry Department of Microbiology and Immunology Russian Academy of Sciences University of Western Ontario Leninsky Prospekt 47 London, ON N6A 5C1 119991 Moscow, V-334 Canada Russia [email protected] [email protected] This work is subject to copyright. All rights are reserved, whether the whole or part of the material is concerned, specifically those of translation, reprinting, re-use of illustrations, broadcasting, reproduction by photocopying machines or similar means, and storage in data banks. Product Liability: The publisher can give no guarantee for all the information contained in this book. The use of registered names, trademarks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. # 2011 Springer-Verlag/Wien SpringerWienNewYork is a part of Springer Science+Business Media springer.at Cover design: WMXDesign GmbH, Heidelberg, Germany Typesetting: SPi, Pondicherry, India Printed on acid-free and chlorine-free bleached paper SPIN: 12599509 With 65 Figures Library of Congress Control Number: 2011932724 ISBN 978-3-7091-0732-4 e-ISBN 978-3-7091-0733-1 DOI 10.1007/978-3-7091-0733-1 SpringerWienNewYork Preface The lipopolysaccharide (LPS) is the major component of the outer leaflet of the outer membrane of Gram-negative bacteria. It contributes essentially to the integrity and stability of the outer membrane, represents an effective permeability barrier towards external stress factors, and is thus indispensable for the viability of bacteria in various niches, including animal and plant environment. -
Vol.22 (2), June, 2020 BIONOTES TABLE of CONTENTS
ISSN 0972- 1800 VOLUME 22, NO. 2 QUARTERLY APRIL-JUNE, 2020 Date of Publication: 28th June, 2020 BIONOTES A Quarterly Newsletter for Research Notes and News On Any Aspect Related with Life Forms BIONOTES articles are abstracted/indexed/available in the Indian Science Abstracts, INSDOC; Zoological Record; Thomson Reuters (U.S.A); CAB International (U.K.); The Natural History Museum Library & Archives, London: Library Naturkundemuseum, Erfurt (Germany) etc. and online databases. Founder Editor Manuscripts Dr. R. K. Varshney, Aligarh, India Please E-mail to [email protected]. Board of Editors Guidelines for Authors Peter Smetacek, Bhimtal, India BIONOTES publishes short notes on any aspect of biology. Usually submissions are V.V. Ramamurthy, New Delhi, India reviewed by one or two reviewers. Jean Haxaire, Laplune, France Kindly submit a manuscript after studying the format used in this journal Vernon Antoine Brou, Jr., Abita Springs, (http://www.entosocindia.org/). Editor U.S.A. reserves the right to reject articles that do not Zdenek F. Fric, Ceske Budejovice, Czech adhere to our format. Please provide a contact Republic telephone number. Authors will be provided Stefan Naumann, Berlin, Germany with a pdf file of their publication. R.C. Kendrick, Hong Kong SAR Address for Correspondence Publication Policy Butterfly Research Centre, Bhimtal, Information, statements or findings Uttarakhand 263 136, India. Phone: +91 published are the views of its author/ source 8938896403. only. Email: [email protected] From Volume 21 Published by the Entomological Society of India (ESI), New Delhi (Nodal Officer: V.V. Ramamurthy, ESI, New Delhi) And Butterfly Research Centre, Bhimtal Executive Editor: Peter Smetacek Assistant Editor: Shristee Panthee Butterfly Research Trust, Bhimtal Published by Dr. -
The Structural Diversity of Carbohydrate Antigens of Selected Gram-Negative Marine Bacteria
Mar. Drugs 2011, 9, 1914-1954; doi:10.3390/md9101914 OPEN ACCESS Marine Drugs ISSN 1660-3397 www.mdpi.com/journal/marinedrugs Review The Structural Diversity of Carbohydrate Antigens of Selected Gram-Negative Marine Bacteria Evgeny L. Nazarenko 1, Russell J. Crawford 2 and Elena P. Ivanova 2,* 1 Pacific Institute of Bioorganic Chemistry, Far East Branch of the Russian Academy of Sciences, Vladivostok 690022, Russia; E-Mail: [email protected] 2 Faculty of Life and Social Sciences, Swinburne University of Technology, PO Box 218, Hawthorn, Victoria 3122, Australia; E-Mail: [email protected] * Author to whom correspondence should be addressed; E-Mail: [email protected]; Tel.: +61-3-9214-5237; Fax: +61-3-9819-0834. Received: 3 August 2011; in revised form: 7 September 2011 / Accepted: 13 September 2011 / Published: 14 October 2011 Abstract: Marine microorganisms have evolved for millions of years to survive in the environments characterized by one or more extreme physical or chemical parameters, e.g., high pressure, low temperature or high salinity. Marine bacteria have the ability to produce a range of biologically active molecules, such as antibiotics, toxins and antitoxins, antitumor and antimicrobial agents, and as a result, they have been a topic of research interest for many years. Among these biologically active molecules, the carbohydrate antigens, lipopolysaccharides (LPSs, O-antigens) found in cell walls of Gram-negative marine bacteria, show great potential as candidates in the development of drugs to prevent septic shock due to their low virulence. The structural diversity of LPSs is thought to be a reflection of the ability for these bacteria to adapt to an array of habitats, protecting the cell from being compromised by exposure to harsh environmental stress factors. -
Bioactivity, Chemical Profiling, and 16S Rrna-Based Phylogeny of Pseudoalteromonas Strains Collected on a Global Research Cruise
Downloaded from orbit.dtu.dk on: Oct 04, 2021 Bioactivity, Chemical Profiling, and 16S rRNA-Based Phylogeny of Pseudoalteromonas Strains Collected on a Global Research Cruise Vynne, Nikolaj Grønnegaard; Månsson, Maria; Nielsen, Kristian Fog; Gram, Lone Published in: Marine Biotechnology Link to article, DOI: 10.1007/s10126-011-9369-4 Publication date: 2011 Link back to DTU Orbit Citation (APA): Vynne, N. G., Månsson, M., Nielsen, K. F., & Gram, L. (2011). Bioactivity, Chemical Profiling, and 16S rRNA- Based Phylogeny of Pseudoalteromonas Strains Collected on a Global Research Cruise. Marine Biotechnology, 13(6), 1062-1073. https://doi.org/10.1007/s10126-011-9369-4 General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights. Users may download and print one copy of any publication from the public portal for the purpose of private study or research. You may not further distribute the material or use it for any profit-making activity or commercial gain You may freely distribute the URL identifying the publication in the public portal If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. 1 Bioactivity, chemical profiling and 16S rRNA based phylogeny of 2 Pseudoalteromonas strains collected on a global research cruise 3 4 Nikolaj G. Vynne1*, Maria Månsson2, Kristian F. Nielsen2 and Lone Gram1 5 6 1 Technical University of Denmark, National Food Institute, Søltofts Plads, bldg. -
Spotlight on Antimicrobial Metabolites from the Marine Bacteria Pseudoalteromonas: Chemodiversity and Ecological Significance
marine drugs Review Spotlight on Antimicrobial Metabolites from the Marine Bacteria Pseudoalteromonas: Chemodiversity and Ecological Significance Clément Offret, Florie Desriac †, Patrick Le Chevalier, Jérôme Mounier, Camille Jégou and Yannick Fleury * Laboratoire Universitaire de Biodiversité et d’Ecologie Microbienne LUBEM EA3882, Université de Brest, Technopole Brest-Iroise, 29280 Plouzané, France; [email protected] (C.O.); fl[email protected] (F.D.); [email protected] (P.L.C.); [email protected] (J.M.); [email protected] (C.J.) * Correspondence: yannick.fl[email protected]; Tel.: +33-298-641-935 † Present address: University of Lille, INRA, ISA; University of Artois; University of Littoral Côte d’Opale; Institute of Charles Viollette, EA 7394 Lille, France. Academic Editor: Paola Laurienzo Received: 30 May 2016; Accepted: 29 June 2016; Published: 8 July 2016 Abstract: This review is dedicated to the antimicrobial metabolite-producing Pseudoalteromonas strains. The genus Pseudoalteromonas hosts 41 species, among which 16 are antimicrobial metabolite producers. To date, a total of 69 antimicrobial compounds belonging to 18 different families have been documented. They are classified into alkaloids, polyketides, and peptides. Finally as Pseudoalteromonas strains are frequently associated with macroorganisms, we can discuss the ecological significance of antimicrobial Pseudoalteromonas as part of the resident microbiota. Keywords: Pseudoalteromonas; antimicrobial metabolites; alkaloid; polyketide; non ribosomal peptide; genome mining; marine host-associated microbiota; probiotic 1. Introduction Last October, we celebrated the 20th anniversary of the genus Pseudoalteromonas having been split from Alteromonas [1]. The genus Pseudoalteromonas includes Gram-negative, heterotrophic, and aerobic bacteria with a polar flagellum and has a GC content comprised between 38% and 50% [2]. -
Moths at Kadoorie Farm 1994-2004
Fauna Department Kadoorie Farm and Botanic Garden Lam Kam Road Tai Po, N.T. Phone 24886192 Hong Kong Fax 24831877 Fauna Conservation Department Project Report Monday, 30th May 2004 Project Area: Conservation (Species & Habitats); Wildlife Monitoring Project title: Moth Survey Code: FAU206 Coordinator: R.C. Kendrick Ph.D. Report period: 1994 to March 2004 Fauna Department Kadoorie Farm and Botanic Garden Lam Kam Road Tai Po, N.T. Phone 24886192 Hong Kong Fax 24831877 Summary Moth Survey Report 1994 to March 2004 at Kadoorie Farm & Botanic Garden Tai Po, Hong Kong. by R.C. Kendrick Ph.D. Report No. KFBG-FAU206/1 May 2004 Project Area: Conservation (Species & Habitats); Wildlife Monitoring Project title: Moth Survey Coordinator: Roger Kendrick Ph.D 1 CODE: FAU 206 Date commenced: February 2001 1 P/T Senior Conservation Officer, Fauna Conservation Department, Kadoorie Farm & Botanic Garden Corporation KFBG Moth Report 1994-2004 R.C.Kendrick, Fauna Conservation Contents 1 ABSTRACT 3 2 INTRODUCTION 4 3 OBJECTIVES 4 4 METHODS 5 4.1 SPECIES RICHNESS & DIVERSITY AT KFBG 5 4.2 SPECIES OF CONSERVATION IMPORTANCE 5 5 RESULTS 6 5.1 SPECIES RICHNESS & DIVERSITY AT KFBG 8 5.2 SPECIES OF CONSERVATION IMPORTANCE 12 6 DISCUSSION 18 7 CONCLUSIONS 19 8 REFERENCES 19 9 APPENDIX 21 9.1 SPECIES LIST 21 9.2 RAW DATA 28 1 ABSTRACT A brief history of moth recording at Kadoorie Farm & Botanic Garden is presented. Data from light trapping between 1994 and March 2004 is given. KFBG was found to have a high diversity and high species richness of moths. -
BIOSYNTHESIS of PRODIGININE and TAMBJAMINE NATURAL PRODUCTS in PSEUDOALTEROMONAS SP. by Katherine J. Picott a Thesis Submitted T
BIOSYNTHESIS OF PRODIGININE AND TAMBJAMINE NATURAL PRODUCTS IN PSEUDOALTEROMONAS SP. by Katherine J. Picott A thesis submitted to the Department of Biomedical and Molecular Sciences in conformity with the requirements for the degree of Master of Science Queen’s University Kingston, Ontario, Canada October, 2018 Copyright © Katherine J. Picott, 2018 ‘The more that you read, the more things you will know. The more that you learn, the more places you’ll go” – Dr. Suess ii Abstract Prodiginines and tambjamines are two classes of pigmented natural products that display structural variety and hold many useful bioactivities, making them a desirable target for pharmaceutical agents1. Enzymes PigC and TamQ are responsible for the final step in prodiginine and tambjamine biosynthesis respectively, involving the coupling of a product specific intermediate to the shared intermediate 4-methoxy-2,2’-bipyrrole-5-carbaldehyde2. Previous investigations have focused solely on PigC and have not successfully purified the enzyme, inciting the use of crude cell lysate to test enzyme activity3,4. The objectives of this research were to directly compare the kinetic characteristics and substrate selectivity of PigC and TamQ. PigC was cloned from Pseudoalteromonas rubra, a known producer of several prodiginine analogues5,6. TamQ was cloned from Pseudoalteromonas citrea, which is predicted to produce tambjamine YP1 based on genomic mining. PigC and TamQ were successfully heterologously expressed and purified, and enzymatic activities of both PigC and TamQ were reconstituted with their native and pseudo-native substrates. The true kinetic parameters of two substrates for PigC were determined, allowing for prediction of the reaction sequence and a proposed Ter Bi Ping Pong enzyme system. -
Repurposing a Chemosensory Macromolecular Machine
Supplementary Information Repurposing a chemosensory macromolecular machine Ortega D. R. et. al. 1 Supplementary Discussion Our results also shed light on the biological function of CheD. CheD is thought to interact with chemoreceptors in an adaptation mechanism together with CheC and CheY1, but more recent results showed that CheD from Bacillus subtilis is able to deamidate chemoreceptors in vitro without CheC2. Our results provide two further pieces of evidence supporting the idea that CheD is able to perform a biological role independently of CheC. First, the ancestral F7 system included cheD but not cheC. Second, cheD co-evolved with the ancestral F7 cheY (it was lost in the same evolutionary step), pointing to a functional link. A recent study in Comamonas testosteroni, an organism with a stage 4 F7 system, shows that the kinase CheA is able to phosphorylate both the ancient CheY as well as the recently acquired CheY- F6-like3. Deletion of the CheY-F6-like protein completely abolished chemotaxis response, while the deletion of CheY-F7 only partially affected it. The study further shows that CheY-F7 has a much faster auto-dephosphorylation rate than CheY-F6-like. The authors interpreted these results such that the CheY-F6-like is the primary response regulator, and CheY-F7 may act as a phosphate sink. These conclusions are based on previous work in organisms with multiple CheY genes per chemosensory cluster. However, because CheY-F7 in stages 1 and 2 is the sole response regulator of the system, we hypothesize that it plays a major role in the control of a yet-unknown cellular process, at least in stages 1 and 2.