Genome Based Analyses Reveals the Presence of Heterotypic Synonyms and Subspecies in Bacteria and Archaea
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Microbial Identification Framework for Risk Assessment
Microbial Identification Framework for Risk Assessment May 2017 Cat. No.: En14-317/2018E-PDF ISBN 978-0-660-24940-7 Information contained in this publication or product may be reproduced, in part or in whole, and by any means, for personal or public non-commercial purposes, without charge or further permission, unless otherwise specified. You are asked to: • Exercise due diligence in ensuring the accuracy of the materials reproduced; • Indicate both the complete title of the materials reproduced, as well as the author organization; and • Indicate that the reproduction is a copy of an official work that is published by the Government of Canada and that the reproduction has not been produced in affiliation with or with the endorsement of the Government of Canada. Commercial reproduction and distribution is prohibited except with written permission from the author. For more information, please contact Environment and Climate Change Canada’s Inquiry Centre at 1-800-668-6767 (in Canada only) or 819-997-2800 or email to [email protected]. © Her Majesty the Queen in Right of Canada, represented by the Minister of the Environment and Climate Change, 2016. Aussi disponible en français Microbial Identification Framework for Risk Assessment Page 2 of 98 Summary The New Substances Notification Regulations (Organisms) (the regulations) of the Canadian Environmental Protection Act, 1999 (CEPA) are organized according to organism type (micro- organisms and organisms other than micro-organisms) and by activity. The Microbial Identification Framework for Risk Assessment (MIFRA) provides guidance on the required information for identifying micro-organisms. This document is intended for those who deal with the technical aspects of information elements or information requirements of the regulations that pertain to identification of a notified micro-organism. -
Heat Resistant Thermophilic Endospores in Cold Estuarine Sediments
Heat resistant thermophilic endospores in cold estuarine sediments Emma Bell Thesis submitted for the degree of Doctor of Philosophy School of Civil Engineering and Geosciences Faculty of Science, Agriculture and Engineering February 2016 Abstract Microbial biogeography explores the spatial and temporal distribution of microorganisms at multiple scales and is influenced by environmental selection and passive dispersal. Understanding the relative contribution of these factors can be challenging as their effects can be difficult to differentiate. Dormant thermophilic endospores in cold sediments offer a natural model for studies focusing on passive dispersal. Understanding distributions of these endospores is not confounded by the influence of environmental selection; rather their occurrence is due exclusively to passive transport. Sediment heating experiments were designed to investigate the dispersal histories of various thermophilic spore-forming Firmicutes in the River Tyne, a tidal estuary in North East England linking inland tributaries with the North Sea. Microcosm incubations at 50-80°C were monitored for sulfate reduction and enriched bacterial populations were characterised using denaturing gradient gel electrophoresis, functional gene clone libraries and high-throughput sequencing. The distribution of thermophilic endospores among different locations along the estuary was spatially variable, indicating that dispersal vectors originating in both warm terrestrial and marine habitats contribute to microbial diversity in estuarine and marine environments. In addition to their persistence in cold sediments, some endospores displayed a remarkable heat-resistance surviving multiple rounds of autoclaving. These extremely heat-resistant endospores are genetically similar to those detected in deep subsurface environments, including geothermal groundwater investigated from a nearby terrestrial borehole drilled to >1800 m depth with bottom temperatures in excess of 70°C. -
Culture Independent Analysis of Microbiota in the Gut of Pine Weevils
Culture independent analysis of microbiota in the gut of pine weevils KTH Biotechnology 2013-January-13 Diploma work by: Tobias B. Ölander Environmental Microbiology, KTH Supervisor: Associate prof. Gunaratna K. Rajarao Examinator: Prof. Stefan Ståhl 1 Abstract In Sweden, the pine weevil causes damages for several hundreds of millions kronor annually. The discouraged use of insecticides has resulted in that other methods to prevent pine weevil feeding needs to be found. Antifeedants found in the pine weevil own feces is one such alternative. The source of the most active antifeedants in the feces is probably from bacterial or fungal lignin degrading symbionts in the pine weevil gut. The aim of the project was to analyze the pine weevil gut microbiota with the help of culture independent methods. DNA (including bacterial DNA) was extracted from both midgut and egg cells. The extracted DNA was amplified with PCR. A clone library was created by cloning the amplified DNA into plasmid vectors and transforming the vector constructs with chemically competent cells. The clones were amplified again with either colony PCR or plasmid extraction followed by PCR, and used for RFLP (Restriction Fragment Length Polymorphism) and sequencing. Species found in the midgut sample included Acinetobacter sp., Ramlibacter sp., Chryseobacterium sp., Flavisolibacter sp. and Wolbachia sp. Species found in the egg sample included Wolbachia sp. and Halomonas sp. Wolbachia sp. and Halomonas sp. were found to be the dominant members of the midgut and egg cells respectively. -
Complete Genome Sequence of the Hyperthermophilic Bacteria- Thermotoga Sp
COMPLETE GENOME SEQUENCE OF THE HYPERTHERMOPHILIC BACTERIA- THERMOTOGA SP. STRAIN RQ7 Rutika Puranik A Thesis Submitted to the Graduate College of Bowling Green State University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE May 2015 Committee: Zhaohui Xu, Advisor Scott Rogers George Bullerjahn © 2015 Rutika Puranik All Rights Reserved iii ABSTRACT Zhaohui Xu, Advisor The genus Thermotoga is one of the deep-rooted genus in the phylogenetic tree of life and has been studied for its thermostable enzymes and the property of hydrogen production at higher temperatures. The current study focuses on the complete genome sequencing of T. sp. strain RQ7 to understand and identify the conserved as well as variable properties between the strains and its genus with the approach of comparative genomics. A pipeline was developed to assemble the complete genome based on the next generation sequencing (NGS) data. The pipeline successfully combined computational approaches with wet lab experiments to deliver a completed genome of T. sp. strain RQ7 that has the genome size of 1,851,618 bp with a GC content of 47.1%. The genome is submitted to Genbank with accession CP07633. Comparative genomic analysis of this genome with three other strains of Thermotoga, helped identifying putative natural transformation and competence protein coding genes in addition to the absence of TneDI restriction- modification system in T. sp. strain RQ7. Genome analysis also assisted in recognizing the unique genes in T. sp. strain RQ7 and CRISPR/Cas system. This strain has 8 CRISPR loci and an array of Cas coding genes in the entire genome. -
Crude-Oil-Degrading Thermophilic Bacterium Isolated from an Oil Field
175 Crude-oil-degrading thermophilic bacterium isolated from an oil field Ruixia Hao, Anhuai Lu, and Guanyu Wang Abstract: Thermophilic bacterium strain C2, which has the ability to transform crude oils, was isolated from the reser- voir of the Shengli oil field in East China. The Gram-negative, rod-shaped, nonmotile cells were grown at a high tem- perature, up to 83 °C, in the neutral to alkaline pH range. Depending on the culture conditions, the organism occurred as single rods or as filamentous aggregates. Strain C2 was grown chemoorganotrophically and produced metabolites, such as volatile fatty acids, 1,2-benzenedicarboxylic acid, bis(2-ethylhexyl)ester, dibutyl phthalate, and di-n-octyl phthalate. It could metabolize different organic substrates (acetate, D-glucose, fructose, glycerol, maltose, pyruvate, starch, sucrose, xylose, hexadecane). The G+C content (68 mol%) and the 16S rRNA sequence of strain C2 indicated that the isolate belonged to the genus Thermus. The strain affected different crude oils and changed their physical and chemical prop- erties. The biochemical interactions between crude oils and strain C2 follow distinct trends characterized by a group of chemical markers (saturates, aromatics, resins, asphaltenes). Those trends show an increase in saturates and a decrease in aromatics, resins, and asphaltenes. The bioconversion of crude oils leads to an enrichment in lighter hydrocarbons and an overall redistribution of these hydrocarbons. Key words: thermophile, metabolite, crude oil, degradation, conversion. Résumé : La souche de bactéries thermophiles C2, qui a la capacité de transformer les pétroles bruts, a été isolée d’un réservoir du champs pétrolifère de Shengli dans la Chine orientale. -
Extremely Thermophilic Microorganisms for Biomass
Available online at www.sciencedirect.com Extremely thermophilic microorganisms for biomass conversion: status and prospects Sara E Blumer-Schuette1,4, Irina Kataeva2,4, Janet Westpheling3,4, Michael WW Adams2,4 and Robert M Kelly1,4 Many microorganisms that grow at elevated temperatures are Introduction able to utilize a variety of carbohydrates pertinent to the Conversion of lignocellulosic biomass to fermentable conversion of lignocellulosic biomass to bioenergy. The range sugars represents a major challenge in global efforts to of substrates utilized depends on growth temperature optimum utilize renewable resources in place of fossil fuels to meet and biotope. Hyperthermophilic marine archaea (Topt 80 8C) rising energy demands [1 ]. Thermal, chemical, bio- utilize a- and b-linked glucans, such as starch, barley glucan, chemical, and microbial approaches have been proposed, laminarin, and chitin, while hyperthermophilic marine bacteria both individually and in combination, although none have (Topt 80 8C) utilize the same glucans as well as hemicellulose, proven to be entirely satisfactory as a stand alone strategy. such as xylans and mannans. However, none of these This is not surprising. Unlike existing bioprocesses, organisms are able to efficiently utilize crystalline cellulose. which typically encounter a well-defined and character- Among the thermophiles, this ability is limited to a few terrestrial ized feedstock, lignocellulosic biomasses are highly vari- bacteria with upper temperature limits for growth near 75 8C. able from site to site and even season to season. The most Deconstruction of crystalline cellulose by these extreme attractive biomass conversion technologies will be those thermophiles is achieved by ‘free’ primary cellulases, which are that are insensitive to fluctuations in feedstock and robust distinct from those typically associated with large multi-enzyme in the face of biologically challenging process-operating complexes known as cellulosomes. -
Development of Genetic Tools for Thermotoga Spp
DEVELOPMENT OF GENETIC TOOLS FOR THERMOTOGA SPP. Dongmei Han A Dissertation Submitted to the Graduate College of Bowling Green State University in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY December 2013 Committee: Dr. Zhaohui Xu, Advisor Dr. Lisa C. Chavers Graduate Faculty Representative Dr. George S. Bullerjahn Dr. Raymond A. Larsen Dr. Scott O. Rogers © 2013 Dongmei Han All Rights Reserved iii ABSTRACT Zhaohui Xu, Advisor Thermotoga spp. may serve as model systems for understanding life sustainability under hyperthermophilic conditions. They are also attractive candidates for producing biohydrogen in industry. However, a lack of genetic tools has hampered the investigation and application of these organisms. We improved the cultivation method of Thermotoga spp. for preparing and handling Thermotoga solid cultures under aerobic conditions. An embedded method achieved a plating efficiency of ~ 50%, and a soft SVO medium was introduced to bridge isolating single Thermotoga colonies from solid medium to liquid medium. The morphological change of T. neapolitana during the growth process was observed through scanning electron microscopy and transmission electron microscopy. At the early exponential phase, around OD600 0.1 – 0.2, the area of adhered region between toga and cell membrane was the largest, and it was suspected to be the optimal time for DNA uptake in transformation. The capacity of natural transformation was found in T. sp. RQ7, but not in T. maritima. A Thermotoga-E. coli shuttle vector pDH10 was constructed using pRQ7, a cryptic mini-plasmid isolated from T. sp. RQ7. Plasmid pDH10 was introduced to T. sp. RQ7 by liposome-mediated transformation, electroporation, and natural transformation, and to T. -
REVISTA ESPAÑOLA DE Qquimioterapiauimioterapia SPANISH JOURNAL of CHEMOTHERAPY ISSN: 0214-3429 Volumen 31 Número 2 Abril 2018 Páginas: 101 - 202
REVISTA ESPAÑOLA DE QQuimioterapiauimioterapia SPANISH JOURNAL OF CHEMOTHERAPY ISSN: 0214-3429 Volumen 31 Número 2 Abril 2018 Páginas: 101 - 202 Publicación Oficial de la Sociedad Española de Quimioterapia Imagen portada: María Teresa Corcuera REVISTA ESPAÑOLA DE Quimioterapia Revista Española de Quimioterapia tiene un carácter multidisciplinar y está dirigida a todos aquellos profesionales involucrados en la epidemiología, diagnóstico, clínica y tratamiento de las enfermedades infecciosas Fundada en 1988 por la Sociedad Española de Quimioterapia Sociedad Española de Quimioterapia Indexada en Publicidad y Suscripciones Publicación que cumple los requisitos de Science Citation Index Sociedad Española de Quimioterapia soporte válido Expanded (SCI), Dpto. de Microbiología Index Medicus (MEDLINE), Facultad de Medicina ISSN Excerpta Medica/EMBASE, Avda. Complutense, s/n 0214-3429 Índice Médico Español (IME), 28040 Madrid Índice Bibliográfico en Ciencias e-ISSN de la Salud (IBECS) 1988-9518 Atención al cliente Depósito Legal Secretaría técnica Teléfono 91 394 15 12 M-32320-2012 Dpto. de Microbiología Correo electrónico Facultad de Medicina [email protected] Maquetación Avda. Complutense, s/n acomm 28040 Madrid [email protected] Consulte nuestra página web Imagen portada: Disponible en Internet: www.seq.es María Teresa Corcuera www.seq.es Impresión España Esta publicación se imprime en papel no ácido. This publication is printed in acid free paper. © Copyright 2018 Sociedad Española de Quimioterapia LOPD Informamos a los lectores que, según la Reservados -
Kappaphycus Alvarezii[I]
Molecular identification of new bacterial causative agent of ice-ice disease on seaweed Kappaphycus alvarezii Marlina Achmad, Alimuddin Alimuddin, Utut Widyastuti, Sukenda Sukenda, Emma Suryanti, Enang Harris Background. Ice-ice disease is still a big challenge for seaweed farming that is characterized with “bleaching” symptom. Bacteria are suspected as cause of ice-ice disease on seaweed Kappaphycus alvarezii. The 16S rRNA gene sequencing is current technique used for bacterial phylogeny and taxonomy studies. This study was aimed to identify bacterial onset of ice-ice disease on K. alvarezii. Methods. Eight sequenced isolates from Indonesia were identified and characterized by biochemical tests and sequenced by 16S rRNA gene as target. The isolates sequence compared to the strains of bacteria from GenBank. DNA sequences are analyzed with ClustalW program and phylogeny were performed using the result generated by Mega v.5. The micropropagules (2-4 cm) was soaked in seawater containing 106 cfu/ml of bacteria to determine the pathogenicity. Onset of ice-ice symptoms was visually observed every day. Histology are analyzed to show tissue of micropropagule post-infection by bacteria. Results. Identification of bacteria employed biochemical tests and 16 SrRNA gene sequence analysis. The results reveal eight species of bacteria, namely: Shewanella haliotis strain DW01, 2 Vibrio alginolyticus strain ATCC 17749, Stenotrophomonas maltophilia strain IAM 12323, Arthrobacter nicotiannae strain DSM 20123, Pseudomonas aeruginosa strain SNP0614, Ochrobactrum anthropic strain ATCC 49188, Catenococcus thiocycli strain TG 5-3 and Bacillus subtilis subsp.spizizenii strain ATCC 6633. In term of groups, bacteria S. haliotis, V. alginolyticus, S. maltophilia, P. aeruginosa and C. thiocycli are the in Gammaproteobacteria group and O. -
Genome Analysis of Multidrug-Resistant Shewanella Algae Isolated from Human Soft Tissue Sample
DATA REPORT published: 26 April 2018 doi: 10.3389/fphar.2018.00419 Genome Analysis of Multidrug-Resistant Shewanella algae Isolated From Human Soft Tissue Sample Yao-Ting Huang 1, Yu-Yu Tang 1, Jan-Fang Cheng 2, Zong-Yen Wu 3, Yan-Chiao Mao 4,5 and Po-Yu Liu 6,7,8* 1 Department of Computer Science and Information Engineering, National Chung Cheng University, Chia-Yi, Taiwan, 2 Department of Energy, Joint Genome Institute, Walnut Creek, CA, United States, 3 Department of Veterinary Medicine, National Chung Hsing University, Taichung, Taiwan, 4 Division of Clinical Toxicology, Department of Emergency Medicine, Taichung Veterans General Hospital, Taichung, Taiwan, 5 School of Medicine, National Defense Medical Center, Taipei, Taiwan, 6 Department of Nursing, Shu-Zen Junior College of Medicine and Management, Kaohsiung City, Taiwan, 7 Rong Edited by: Hsing Research Center for Translational Medicine, National Chung Hsing University, Taichung, Taiwan, 8 Division of Infectious Stefania Tacconelli, Diseases, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung, Taiwan Università degli Studi G. d’Annunzio Chieti e Pescara, Italy Keywords: Shewanella algae, wound infection, snake bite, virulence, whole-genome sequencing, colistin Reviewed by: resistance, carbapenem resistance Georgios Paschos, University of Pennsylvania, United States INTRODUCTION Luigi Brunetti, Università degli Studi G. d’Annunzio Shewanella algae is a gram negative, facultative anaerobe, which was first isolated from red algae Chieti e Pescara, Italy (Simidu et al., 1990). With its natural habitat being an aquatic environment, it has been rarely Satish Ramalingam, SRM University, India reported as a human pathogen (Khashe and Janda, 1998). S. algae infections, however, have become increasingly common over the past decade (Janda, 2014). -
Downloaded (July 2018) and Aligned Using Msaprobs V0.9.7 (16)
bioRxiv preprint doi: https://doi.org/10.1101/524215; this version posted January 20, 2019. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY-NC-ND 4.0 International license. Positively twisted: The complex evolutionary history of Reverse Gyrase suggests a non- hyperthermophilic Last Universal Common Ancestor Ryan Catchpole1,2 and Patrick Forterre1,2 1Institut Pasteur, Unité de Biologie Moléculaire du Gène chez les Extrêmophiles (BMGE), Département de Microbiologie F-75015 Paris, France 2Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Univ. Paris-Sud, Univ. Paris-Saclay, 91198, Gif-sur-Yvette Cedex, France 1 bioRxiv preprint doi: https://doi.org/10.1101/524215; this version posted January 20, 2019. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY-NC-ND 4.0 International license. Abstract Reverse gyrase (RG) is the only protein found ubiquitously in hyperthermophilic organisms, but absent from mesophiles. As such, its simple presence or absence allows us to deduce information about the optimal growth temperature of long-extinct organisms, even as far as the last universal common ancestor of extant life (LUCA). The growth environment and gene content of the LUCA has long been a source of debate in which RG often features. In an attempt to settle this debate, we carried out an exhaustive search for RG proteins, generating the largest RG dataset to date. -
Postprint Of: Extremophiles (4): 853-861 (2015)
Postprint of: Extremophiles (4): 853-861 (2015) Isolation and Characterization of a Thermotoga sp. Strain PD524, a Hyperthermophile Isolated from a Hot Spring in Thailand Wirojne Kanoksilapatham1*, Porranee Keawram1, Juan M. Gonzalez2 and Frank T. Robb3# 1Department of Microbiology, Faculty of Science, Silpakorn University, Nakhon Pathom, 73000, Thailand 2IRNAS-CSIC, Avda. Reina Mercedes 10, 41012 Sevilla, Spain 3Institute of Marine and Environmental Technology, 701 E. Pratt Street, and Department of Microbiology and Immunology, University of Maryland, Baltimore, MD 21202, USA * Address correspondence to: [email protected] and# : [email protected] Keywords: Thermotogales, hyperthermophile, thermal sensitivity, SDS sensitivity, hot spring Running title: Thermotoga sp. Strain PD524 1 Abstract A hyperthermophilic Thermotoga sp. strain PD524T was isolated from a hot spring in Northern Thailand. Cells were slender rod shaped (0.5-0.6x2.5-10 μm) surrounded by a typical outer membranous toga. Strain PD524 T is aero-tolerant at 4oC but aero-sensitive at 80oC. A heat resistant subpopulation was observed in late stationary growth phase. Cells from late stationary growth phase were revealed substantially more resistant to 0.001% SDS treatment than cells from exponential growth phase. The temperature range for growth was 70-85 oC (opt. temp. 80oC), pH range was 6-8.5 (opt. pH 7.5-8.0) and NaCl conc. range of 0-<10 g/L (opt. conc. 0.5 g/L). Glucose, sucrose, maltose, D-fructose, xylose, D-mannose, arabinose, trehalose, starch and cellobiose were utilized as o = = - growth substrates. Growth was inhibited by S . Growth yield was stimulated by SO4 but not by S2O3 and NO3 .