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  • 1
    Keywords: Microbiology. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (1415 pages)
    Edition: 2nd ed.
    ISBN: 9780387292984
    DDC: 570
    Language: English
    Note: Intro -- BERGEY'S MANUAL® OFSystematic Bacteriology -- Preface to Volume Two of the Second Edition of Bergey's Manual® of Systematic Bacteriology -- Preface to the First Edition of Bergey's Manual® ofSystematic Bacteriology -- Preface to the First Edition of Bergey's Manual® of Determinative Bacteriology -- Contents -- Contributors -- Class I. Alphaproteobacteria class. nov. -- Class II. Betaproteobacteria class. nov. -- Class IV. Deltaproteobacteria class nov. -- Class V. Epsilonproteobacteria class. nov. -- Bibliography -- Index of Scientific Names of Archaea and Bacteria.
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  • 2
    Online Resource
    Online Resource
    Kent :Elsevier Science & Technology,
    Keywords: Prokaryotes. ; Microbiology. ; Electronic books.
    Description / Table of Contents: Volume 41 of Methods in Microbiology is a methods book designed to highlight procedures that will revitalize the purposes and practices of prokaryotic systematics. This volume will notably show that genomics and computational biology are pivotal to the new direction of travel and will emphasise that new developments need to be built upon historical good practices, notably the continued use of the nomenclatural type concept and the requirement to deposit type strains in at least two service culture collections in different countries. Detailed protocols on cutting edge methods Prepared by leading international experts in the relevant fields.
    Type of Medium: Online Resource
    Pages: 1 online resource (368 pages)
    Edition: 1st ed.
    ISBN: 9780128004432
    Series Statement: Issn Series ; v.Volume 41
    DDC: 579.3
    Language: English
    Note: Front Cover -- New Approaches to Prokaryotic Systematics -- Copyright -- Dedication -- Contents -- Contributors -- Preface -- Chapter 1: The Need for Change: Embracing the Genome -- 1. A brief history of genomic sequencing of prokaryotes -- 2. Why Sequence the Genomes of Prokaryotes? -- 3. The State-of-the-Art -- 4. Where We Are Going -- Acknowledgement -- References -- Chapter 2: An Introduction to Phylogenetics and the Tree of Life -- 1. Introduction -- 2. Step 1: Posing a question -- 3. Step 2: Choosing Relevant Sequences -- 3.1. Obtaining 16S rRNA Sequences for Bacteria, Archaea and Eukarya -- 3.2. A note on the availability and use of data and methods -- 4. Step 3: Aligning Sequences and Editing the Alignment -- 5. Step 4: The theory of Fitting and Selecting a Phylogenetic Model -- 5.1. Markov nucleotide substitution models -- 5.2. Inferring phylogenies under Markov substitution models -- 5.3. Frequentist inference -- 5.4. Bayesian inference -- 5.5. Model comparison and assessment -- 5.6. Frequentist methods -- 5.7. Bayesian model choice -- 6. Step 5: Inferring Trees-Practical Guidelines for fitting and comparing Markov substitution models -- 6.1. Alignment formats for phylogeny programs -- 6.2. Inferring maximum likelihood phylogenies using RAxML -- 6.3. Bayesian analyses with PhyloBayes -- 6.4. Posterior predictive checks -- 7. Step 6: Interpreting the Phylogenetic Tree -- Conclusions -- Acknowledgements -- References -- Chapter 3: The All-Species Living Tree Project -- 1. Introduction -- 2. Sources of Information -- 2.1. Classification of microbial databases -- 2.1.1. Taxonomy (LPSN and Bergey's Manual) -- 2.1.2. Type-strain information (StrainInfo database) -- 2.1.3. Sequences and alignments (ARB and SILVA) -- 3. Database creation and updating -- 4. Features of the Database -- 4.1. Optimized SSU and LSU alignments. , 4.2. Curated hierarchical classification -- 4.3. Risk-group classification -- 4.4. Taxonomic thresholds -- 5. Phylogenetic trees -- 6. LTP as a Taxonomic Tool -- Acknowledgements -- References -- Chapter 4: 16S rRNA Gene-Based Identification of Bacteria and Archaea using the EzTaxon Server -- 1. Introduction -- 2. Use of 16S rRNA gene sequences in prokaryotic systematics -- 2.1. Sequencing of 16S rRNA genes -- 2.2. Calculation of nucleotide sequence similarity values of 16S rRNA gene sequences -- 3. Identification of Bacteria Using the EzTaxon Database -- 3.1. EzTaxon database -- 3.2. Algorithm for ``EzTaxon search´´ -- 3.3. Overall workflow from Sanger DNA sequence data -- 3.4. Assembly and trimming of sequences -- 3.5. Manual editing of sequences using the secondary structure information -- 3.5.1. Manual editing of sequences with EzEditor -- 3.6. Identification of strains using the EzTaxon server -- 3.7. Phylogenetic analysis -- Concluding remarks -- Acknowledgement -- References -- Chapter 5: Revolutionizing Prokaryotic Systematics Through Next-Generation Sequencing -- 1. Introduction -- 2. Sequencing Approaches -- 3. Bioinformatic Analyses -- 3.1. De novo assembly and mapping -- 3.2. Annotation -- 3.3. Comparative genomic analysis -- 3.4. SNP extraction and functional characteristics -- 3.5. Phylogenetic analyses -- 4. Applications of Next-Generation Sequencing Technology -- 4.1. Prokaryotic systematics -- 4.2. Pathogen evolution, transmission and adaptation -- 4.3. Genetic basis of phenotypic characteristics -- 4.4. Metagenomics -- 4.5. Target resequencing -- 4.6. RNA-Seq and transcriptomics -- Conclusions -- Acknowledgements -- References -- Chapter 6: Whole-Genome Analyses: Average Nucleotide Identity -- 1. Introduction -- 1.1. Calculation of average nucleotide identity -- 1.2. Theoretical background: BLAST/MUMmer software. , 2. Preparation and DNA Sequencing -- 2.1. Strain cultivation -- 2.2. DNA extraction and quantification -- 2.3. Whole-genome sequencing -- 3. ANI Calculations Using JSpecies -- 3.1. Installation -- 3.2. Operation -- 3.3. Calculations on-line -- 4. Interpretation and publication of results -- 5. Application to Prokaryotic Classification: Case Studies -- Concluding remarks -- Acknowledgements -- References -- Chapter 7: Whole-Genome Sequencing for Rapid and Accurate Identification of Bacterial Transmission Pathways -- 1. Introduction -- 2. The Sequencing Revolution -- 2.1. Second-generation sequencing technologies -- 2.1.1. 454 pyrosequencing -- 2.1.2. Illumina sequencing technology -- 2.1.3. Ion Torrent -- 3. Bacterial typing with next-generation sequencing -- 4. Identifying transmission pathways using whole-genome sequencing - The toolkit -- 4.1. Mapping and alignment of whole genomes -- 4.1.1. Indexing -- 4.1.1.1. Hash tables -- 4.1.1.2. The Burrows-Wheeler transform -- 4.1.2. Realigning indels -- 4.1.3. The SAM format -- 4.1.4. Identifying variation from mapped reads -- 4.2. De novo assembly and genome alignment -- 4.2.1. Read correction -- 4.2.2. Assemblers -- 4.2.2.1. Overlap-layout-consensus -- 4.2.2.2. de Bruijn graphs -- 4.2.2.3. Platform-specific assemblers -- 4.2.3. Scaffolding and gap filling -- 4.2.4. Identifying variation using co-assembly -- 4.3. Identifying variation from whole-genome assemblies -- 4.3.1. Whole-genome alignment -- 4.3.1.1. BLAT -- 4.3.1.2. MUMmer -- 4.3.1.3. Mauve -- 4.3.1.4. Mugsy -- 4.4. Identifying transmissions using whole-genome variation -- 4.4.1. SNP distances - Defining a cutoff -- 4.4.2. Phylogenetic evidence -- 4.4.3. Phylodynamics -- 5. Combining genomic and epidemiological evidence -- 6. Future Directions -- References. , Chapter 8: Identification of Conserved Indels that are Useful for Classification and Evolutionary Studies -- 1. Limitations of the phylogenetic trees for understanding microbial classification -- 2. Characteristics that are well-suited for classification -- 3. Conserved signature indels and Their usefulness for classification and evolutionary studies -- 4. Identification of Conserved Signature Indels in Protein Sequences -- 4.1. Creation of multiple sequence alignments -- 4.2. Identification of potential conserved indels in the sequence alignments -- 4.3. Blast searches on potential conserved indels to identify useful conserved indels -- 4.4. Formatting of the conserved indels -- 5. Interpreting the Significance of Conserved Indels -- 6. Correspondence of the Results Obtained from CSIs with rRNA and Other Phylogenetic Approaches -- 7. Importance of the discovered CSIs for understanding microbial classification and phylogeny -- Acknowledgements -- References -- Chapter 9: Reconciliation Approaches to Determining HGT, Duplications, and Losses in Gene Trees -- 1. Introduction -- 2. Bacterial species tree -- 3. Gene Family -- 4. Evolution of Genes in Bacterial Genomes -- 5. Gene Tree/Species Tree Reconciliation -- 5.1. Protocol for running AnGST -- 5.2. Interpreting the results of AnGST analyses -- 6. Analysis at the Genome Scale -- 6.1. Protocol for running COUNT -- Concluding Remarks -- Acknowledgements -- References -- Chapter 10: Multi-Locus Sequence Typing and the Gene-by-Gene Approach to Bacterial Classification and Analysis of Population -- 1. Introduction -- 1.1. Historical perspective -- 1.2. Multi-locus population analyses -- 2. Multi-locus sequence typing -- 3. Whole-Genome Data Analyses -- 3.1. Gene-by-gene analysis of WGS data -- 3.2. The Bacterial Isolate Genome Sequence Database -- 3.3. Isolate and sequence databases. , 3.4. Reference sequence and profile definitions database -- 3.5. Database Integrity -- 3.6. Gene nomenclature -- 3.7. Typing and analysis schemes -- 4. Examples of Gene-by-Gene Analysis: Neisseria -- 4.1. Ribosomal multi-locus sequence typing -- 4.2. Neisseria rplF assay -- 5. Examples of Gene-by-Gene Analysis: Campylobacter -- 5.1. Core genome multi-locus sequence typing -- 5.2. Whole-genome multi-locus sequence typing -- Conclusions -- References -- Chapter 11: Multi-locus Sequence Analysis: Taking Prokaryotic Systematics to the Next Level -- 1. Introduction -- 2. Multi-Locus Sequence Analysis -- 2.1. Underlying concepts -- 2.2. Selection of gene loci -- 2.3. Generating sequences -- 2.4. Data analysis -- 2.4.1. Properties of loci -- 2.4.1.1. Sequence alignments -- 2.4.1.2. Loci statistics -- 2.4.1.3. Establishing STs -- 2.4.2. Phylogenetic analysis -- 2.4.2.1. Models of evolution -- 2.4.2.2. Evaluating phylogenetic congruence -- 2.4.2.3. Construction of phylogenetic trees -- 2.5. Comparison with other taxonomic methods -- 2.6. MLSAs: Advantages and disadvantages -- 2.7. MLSA databases -- 3. Application of MLSAs in Prokaryotic Systematics -- 3.1. The genus Streptomyces -- 3.1.1. The Streptomyces MLSA scheme -- 3.1.2. DNA:DNA hybridization and MLSAs -- 3.2. Classification of the S. pratensis phylogroup -- 3.3. MLSA of phytopathogenic Streptomyces species -- 3.4. MLSA: Actinobacteria -- 4. Detection of Ecotypes Based on MLSAs -- 5. MLSA Based on Whole Genome Sequences -- References -- Chapter 12: Bacterial Typing and Identification By Genomic Analysis of 16S-23S rRNA Intergenic Transcribed Spacer (ITS) Seque -- 1. Introduction -- 2. Methods -- 2.1. Search and download bacterial whole-genome sequences -- 2.2. Annotation of rrn alleles. , 2.3. Extraction of the gene components (16S, 23S and 5S) and extra genic regions (ITS1, ITS2, pre-16S and post-5S) that make.
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  • 3
    Online Resource
    Online Resource
    New York, NY :Springer New York,
    Keywords: Life sciences. ; Electronic books.
    Description / Table of Contents: This updated final volume in the best-selling series of reference works features descriptions of more than 200 genera in 49 families and includes a revised taxonomic outline for the Actinobacteria as well as many medically and industrially important taxa.
    Type of Medium: Online Resource
    Pages: 1 online resource (2105 pages)
    Edition: 2nd ed.
    ISBN: 9780387682334
    DDC: 579.3012
    Language: English
    Note: Intro -- Bergey's Manual® of Systematic Bacteriology -- Preface to volume 5 of the second edition of Bergey's Manual ® of Systematic Bacteriology -- Contents -- Contributors -- On using the Manual -- Citation -- Arrangement of the Manual -- Articles -- a. Name of the genus. -- b. Name of author(s). -- c. Synonyms. -- d. Etymology of the name. -- e. Salient features. -- f. Type species. -- g. Further descriptive information. -- h. Enrichment and isolation. -- i. Maintenance procedures. -- j. Procedures for testing special characters. -- k. Differentiation of the genus from other genera. -- l. Taxonomic comments. -- m. Further reading. -- n. Differentiation of the species of the genus. -- o. List of species of the genus. -- p. Species incertae sedis. -- q. References. -- Tables -- Use of the Manual for determinative purposes -- Errors, comments, and suggestions -- Road map of the phylum Actinobacteria -- References -- Data analysis -- Taxonomic interpretation -- Phylum " Actinobacteria " -- Class " Actinobacteria " -- Order Actinomycetales and family Actinomycetaceae -- Order " Actinopolysporales " and family Actinopolysporaceae -- Order Bifidobacteriales and family Bifidobacteriaceae -- Order " Catenulisporales " and families Catenulisporaceae and Actinospicaceae -- Order " Corynebacteriales " -- Family Corynebacteriaceae -- Family Dietziaceae -- Family Mycobacteriaceae -- Family Nocardiaceae -- Family Segniliparaceae -- Family Tsukamurellaceae -- Order " Frankiales " -- Family Frankiaceae -- Family Acidothermaceae -- Family Cryptosporangiaceae -- Family Geodermatophilaceae -- Family Nakamurellaceae -- Family Sporichthyaceae -- Order " Glycomycetales " and family Glycomycetaceae -- Order " Jiangellales " and family Jiangellaceae -- Order " Kineosporiales " and family Kineosporiaceae -- Order Micrococcales -- Family Micrococcaceae. , Family Beutenbergiaceae -- Family Bogoriellaceae -- Family Brevibacteriaceae -- Family Cellulomonadaceae -- Family Dermabacteraceae -- Family Dermacoccaceae -- Family Dermatophilaceae -- Family Intrasporangiaceae -- Family Jonesiaceae -- Family Microbacteriaceae -- Family Promicromonosporaceae -- Family Rarobacteraceae -- Family Ruaniaceae -- Family Sanguibacteraceae -- Order " Micromonosporales " and family Micromonosporaceae -- Order " Propionibacteriales " -- Family Propionibacteriaceae -- Family Nocardioidaceae -- Order " Pseudonocardiales " and family Pseudonocardiaceae -- Order " Streptomycetales " and family Streptomycetaceae -- Order " Streptosporangiales " -- Family Streptosporangiaceae -- Family Nocardiopsaceae -- Family Thermomonosporaceae -- Order incertae sedis and the genus Thermobispora -- Class " Acidimicrobiia " and order Acidimicrobiales -- Class " Coriobacteriia " and order Coriobacteriales -- Class " Nitriliruptoria " -- Class " Rubrobacteria " and order Rubrobacterales -- Class " Thermoleophilia " -- Taxonomic outline of the phylum Actinobacteria -- Phylum XXVI. Actinobacteria phyl. nov. -- Taxonomic comments -- Class I. Actinobacteria Stackebrandt, Rainey and Ward-Rainey 1997, 483 -- Order I. Actinomycetales Buchanan 1917, 162 AL emend. Zhi, Li and Stackebrandt 2009, 594 -- Family I. Actinomycetaceae Buchanan 1918, 403 (emend. Stackebrandt, Rainey and Ward-Rainey 1997, 484), emend. Zhi, Li and Stackebrandt 2009, 594 VP -- Genus I. Actinomyces Harz 1877 , 133 AL emend. Georg, Pine and Gerencser 1969 , 292 VP -- Further descriptive information -- Phylogeny. -- Cell morphology. -- Cell-wall composition. -- Other chemotaxonomic characteristics. -- Fine structure. -- Cultural characteristics. -- Life cycle. -- Nutrition and growth conditions. -- Metabolism and metabolic pathways. -- Adherence mechanisms. , 16S rRNA gene sequence and other molecular data. -- Mutants, plasmids, phages, and bacteriocins. -- Antigenic structure. -- Susceptibility to antibiotics and various chemical compounds. -- Trace element requirements. -- Pathogenicity. -- Human diseases and impairments. -- Animal diseases. -- Ecology. -- Enrichment and isolation procedures -- Maintenance procedures -- Procedures for testing of special characters -- Differentiation of the genus Actinomyces from other genera -- Taxonomic comments -- Further reading -- Identification and descriptive characteristics of Actinomyces species -- Genus II. Actinobaculum Lawson, Falsen, Åkervall, Vandamme and Collins 1997, 902 VP -- Further descriptive information -- Isolation procedures -- Maintenance procedures -- Taxonomic comments -- Differentiation of the genus Actinobaculum from other genera -- Differentiation of species of the genus Actinobaculum -- Genus III. Arcanobacterium Collins, Jones and Schofield 1983, 438 VP (Effective publication: Collins, Jones and Schofield 1982b, 1280.), emend. Lehnen, Busse, Frölich, Krasinska, Kämpfer and Speck 2006, 864 VP -- Further descriptive information -- Phylogeny. -- Cell morphology. -- Cell-wall composition. -- Menaquinone composition. -- Polar lipids. -- Fatty acid composition. -- Peptidoglycan composition. -- Metabolism and metabolic pathways. -- Pathogenicity. -- Human infections. -- Animal infections. -- Antigenic structure. -- Virulence factors. -- Susceptibility to antibiotics. -- Habitat and ecology. -- Isolation, enrichment and maintenance procedures -- Differentiation of the genus Arcanobacterium from other genera -- Taxonomic comments -- Further reading -- Identification and descriptive characteristics of Arcanobacterium species -- Genus IV. Mobiluncus Spiegel and Roberts 1984a, 180 VP emend. Hoyles, Collins, Falsen, Nikolaitchouk and McCartney 2004. , Further descriptive information -- Phylogeny. -- Cell-wall composition. -- Fatty acids. -- Flagella. -- Colonial and cultural characteristics. -- Nutrition and growth conditions. -- Antibodies. -- Antibiotic sensitivity. -- Ecology -- Association with BV. -- Prevalence in healthy women. -- Role in pre-term delivery. -- Presence in men. -- Extragenital infections. -- Hosts other than humans. -- Pathogenicity. -- Potential virulence factors. -- Enrichment and isolation procedures -- Differentiation of the genus Mobiluncus from other genera -- Taxonomic comments -- Further reading -- Differentiation of the species of the genus Mobiluncus -- Genus V. Varibaculum Hall, Collins, Lawson, Hutson, Falsen, Inganas and Duerden 2003e, 644 VP -- Further descriptive information -- Isolation procedures -- Maintenance procedures -- Procedures for testing special characters -- Commercially available identification systems. -- Amplified 16S rDNA restriction analysis (ARDRA). -- Differentiation of the genus Varibaculum from other genera -- Taxonomic comments -- References -- Further descriptive information -- Key to the genera of the family Actinomycetaceae -- List of species of the genus Actinomyces -- Species incertae sedis -- List of species of the genus Actinobaculum -- List of species of the genus Arcanobacterium -- List of species of the genus Mobiluncus -- List of species of the genus Varibaculum -- Order II. Actinopolysporales ord. nov. -- References -- Family I. Actinopolysporaceae Zhi, Li and Stackebrandt 2009, 595 VP -- Genus I. Actinopolyspora Gochnauer, Leppard, Komaratat, Kates, Novitsky and Kushner 1975 , 1510 AL -- Further descriptive information -- Phylogeny. -- Cell morphology. -- Fine structure. -- Colony morphology. -- Chemotaxonomy. -- Nutrition and growth conditions. -- Metabolism and genetics. -- Antibiotic sensitivity. -- Ecology. , Isolation procedures -- Maintenance procedures -- Differentiation of the genus Actinopolyspora from other genera -- Taxonomic comments -- Differentiation of the species of the genus Actinopolyspora -- List of species of the genus Actinopolyspora -- Species incertae sedis -- References -- Order III. Bifidobacteriales Stackebrandt, Rainey and Ward-Rainey 1997, 487 VP -- References -- Family I. Bifidobacteriaceae Stackebrandt, Rainey and Ward-Rainey 1997, 487 VP -- Genus I. Bifidobacterium Orla-Jensen 1924 , 472 AL -- Further descriptive information -- Phylogeny. -- Cell morphology. -- Cell-wall composition. -- Fine structure. -- Nutrition and growth conditions. -- Anaerobiosis. -- Metabolism and metabolic pathways. -- Urease activity. -- Nitrate reduction. -- Genetics. -- Plasmids. -- Antibiotic or drug sensitivity. -- Bacteriocins. -- Pathogenicity. -- Ecology. -- Bifidobacteria as health-promoting agents: probiotic, prebiotic, and symbiotic substances. -- Isolation procedures -- Maintenance procedures -- Enzymes used for species and group differentiation -- Transaldolases. -- 6-Phosphogluconate dehydrogenases (6PGD). -- Procedures for testing special identification characteristics -- F6PPK test. -- Classical procedure. -- Modified procedure. -- Differentiation of the species of the genus Bifidobacterium -- List of species of the genus Bifidobacterium -- Genus II. Aeriscardovia Simpson, Ross, Fitzgerald and Stanton 2004 , 405 VP -- Further descriptive information -- Phylogeny. -- Anaerobiosis. -- Maintenance procedures -- List of species of the genus Aeriscardovia -- Genus III. Alloscardovia Huys, Vancanneyt, D'Haene, Falsen, Wauters and Vandamme 2007 , 1445 VP -- Further descriptive information -- Maintenance procedures -- List of species of the genus Alloscardovia -- Genus IV. Gardnerella Greenwood and Pickett 1980 , 176 VP. , Further descriptive information.
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 15 (1982), S. 0 
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Phylogenetic studies based on the 16S ribosomal gene sequences showed that members of the genus Catellatospora revealed phylogenetic heterogeneity within the family Micromonosporaceae as well as a heterogeneous menaquinone composition. Among them, Catellatospora matsumotoense was closely related to members of the genus Micromonospora, indicating that this organism should be excluded from the genus Catellatospora. On the basis of classical taxonomic characteristics and phylogenetic evidence, Catellatospora matsumotoense is proposed to be transferred to the genus Micromonospora as M. matsumotoense comb. nov.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract An artificial neural network was trained to distinguish between three putatively novel species of Streptomyces using normalised, scaled pyrolysis mass spectra from three representative strains of each of the taxa, each sampled in triplicate. Once trained, the artificial neural network was challenged with spectral data from the original organisms, the ‘training set’, from additional members of the putative novel taxa and from over a hundred strains representing six other actinomycete genera. All of the streptomycetes were correctly identified but many of the other actinomycetes were mis-identified. A modified network topology was developed to recognise the mass spectral patterns of the non-streptomycete strains. The resultant neural network correctly identified the streptomycetes, whereas all of the remaining actinomycetes were recognised as unknown organisms. The improved artificial neural network provides a rapid, reliable and cost-effective method of identifying members of the three target streptomycete taxa.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 118 (1994), S. 0 
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract A genomic DNA sequence of Streptomyces strain ISP 5485 was cloned, sequenced and compared with corresponding information from nucleic acid data banks. The DNA sequence was unique, but showed homology to DNA coding for the condensing enzyme, 2-oxoacyl synthase, of the deoxyerythronolide B synthase complex (DEBS) from Saccharopolyspora erythraea NRRL 2338. A subfragment of the sequenced DNA was used to construct a gene-specific probe that formed part of the putative 2-oxoacyl synthase gene. The PCR-amplified and labelled probe was used in hybridization experiments involving 33 streptomycete strains that produced different classes of antibiotics. The probe showed widespread homology with DNA considered to be part of analogous genes within genomes of different polyketide producers. The implications of the probe homology to bacterial chromosomal DNA are discussed.
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  • 8
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 245 (2005), S. 0 
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Large numbers of filamentous actinomycetes which formed distinctive red coloured colonies were isolated from three out of four composite soil samples using a medium designed to be selective for members of the Streptomyces violaceoruber clade, a taxon which includes the model organisms “Streptomyces coelicolor” A3(2) and “Streptomyces lividans” 66. The isolation medium, dextran-histidine-sodium chloride-mineral salts agar supplemented with antibacterial and antifungal antibiotics, also supported the growth of representatives of the S. violaceoruber clade. One hundred and ninety one representatives of the isolates that produced red colour colonies on the isolation medium were distributed into four colour groups based on their ability to form distinctive pigments and morphological properties typical of members of the S. violaceoruber clade, an assignment that was confirmed by corresponding 16S rRNA gene sequencing studies. The selective isolation and characterisation procedures used in the present investigation provide a practical means of determining the taxonomic diversity, geographical distribution and roles of representatives of the S. violaceoruber clade in natural habitats.
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Archives of microbiology 139 (1984), S. 225-231 
    ISSN: 1432-072X
    Keywords: Mycolic acids ; Mycobacteria ; Thin-layer chromatographic analysis ; Acid methanolysates ; Alka-line methanolysates ; Chemotaxonomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Representative strains of some species of Mycobacterium were degraded by both acid and alkaline methanolysis. Two-dimensional thin-layer chromatography was used to determine the patterns of mycolic acids and other long-chain components in these methanolysates. Patterns composed of α-, methoxy- and ketomycolates were found in Mycobacterium asiaticum, Mycobacterium bovix, Mycobacterium gastri, Mycobacterium gordonae, Mycobacterium kansasii, Mycobacterium marinum and Mycobacterium tuberculosis; a representative of Mycobacterium thermoresistibile also contained lower molecular weight α′-mycolates in addition to these three acids. In representatives or Mycobacterium avium, Mycobacterium intracellulare, Mycobacterium nonchromogenicum, “Mycobacterium novum”, Mycobacterium paratuberculosis, Mycobacterium scrofulaceum, Mycobacterium terrae, Mycobacterium xenopi, and Mycobacterium sp. MNC 165 α- and ketomycolates were accompanied by ω-carboxymycolates and 2-eicosanol and homologous alcohols which are derived from wax-ester mycolates. Mycobacterium fortuitum and “Mycobacterium giae” contained α′- and epoxymycolates and both serovars of Mycobacterium simiae had a very characteristic pattern of α-, α′- and ketomycolic acids. Comparison with data for other mycobacteria showed the chemotaxonomic significance of these mycolic acid patterns.
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  • 10
    ISSN: 1432-072X
    Keywords: Chemotaxonomy ; Lipids ; Nocardioides ; Arthrobacter simplex ; Arthrobacter tumescens ; Nocardioides simplex comb. nov.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Representative strains of Nocardioides, Arthrobacter simplex and Arthrobacter tumescens were degraded by acid methanolysis and the fatty acid esters released examined by thin-layer and gas chromatography. Branchedchain 14-methylpentadecanoic acid (iso-16) was the predominant component in all but one of the Nocardioides strains. Arthrobacter simplex also contained major amounts of this acid whereas A. tumescens had only minor amounts. All of the test strains possessed 15 and 17 carbon straight chain acids, tuberculostearic acid (10-methyloctadecanoic acid) and its 17 and 18-carbon homologues. The fatty acid profiles of Nocardioides strains lacked 13-methyltetradecanoic and heptadecanoic acids which were both present in Arthrobacter simplex and Arthrobacter tumescens. The profiles of these latter organisms were quantitatively different from each other. The polar lipids of the test strains all contained diphosphatidylglycerol and phosphatidylglycerol but only Arthrobacter tumescens contained phosphatidylinositol and three unidentified polar lipids. Nocardioides and Arthrobacter simplex strains all contained two very characteristic closely related polar lipids. All of the test strains contained tetrahydrogenated menaquinones with eight isoprene units as the major isoprenologue. The results of the present study support the integrity of the genus Nocardioides and provide a reliable way of distinguishing it from other actinomycetes, such as Streptomyces, which also have LL-diaminopimelic acid and glycine in the peptidoglycan. The lipid data, together with results from chemical, genetic and phage host range studies, provide sufficient grounds for the transfer of Arthrobacter simplex to Nocardioides as Nocardioides simplex comb. nov. An emended description of the genus Nocarioides is given.
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