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  • 1
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    Control of Specialized Metabolism by Signaling and Transcriptional Regulation: Opportunities for New Platforms for Drug Discovery? (2018)
    Annual Reviews
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    Publication Date: 2018-09-08
    Description: Specialized metabolites are bacterially produced small molecules that have an extraordinary diversity of important biological activities. They are useful as biochemical probes of living systems, and they have been adapted for use as drugs for human afflictions ranging from infectious diseases to cancer. The biosynthetic genes for these molecules are controlled by a dense network of regulatory mechanisms: Cell-cell signaling and nutrient sensing are conspicuous features of this network. While many components of these mechanisms have been identified, important questions about their biological roles remain shrouded in mystery. In addition to identifying new molecules and solving their mechanisms of action (a central preoccupation in this field), we suggest that addressing questions of quorum sensing versus diffusion sensing and identifying the dominant nutritional and environmental cues for specialized metabolism are important directions for research.
    Print ISSN: 0066-4227
    Electronic ISSN: 1545-3251
    Topics: Biology
    Published by Annual Reviews
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  • 2
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    Isolation of planctomycetes from Aplysina sponges (2003)
    Inter-Research
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    Publication Date: 2003-01-01
    Print ISSN: 0948-3055
    Electronic ISSN: 1616-1564
    Topics: Biology
    Published by Inter-Research
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    PAPER CURRENT
  • 3
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    Isolation of planctomycetes from Aplysina sponges (2003)
    Inter Research
    In:  Aquatic Microbial Ecology, 33 . pp. 239-245.
    Details
    Publication Date: 2015-08-27
    Description: There is mounting molecular evidence that bacteria belonging to the phylum Planctomycetes are abundant in marine sponges including members of the genus Aplysina. In an attempt to culture planctomycete bacteria from Aplysina sponges, 116 bacterial strains were isolated on selective oligotrophic media. Screening of the strain collection by fluorescence in situ hybridization with the planctomycete-specific probe Pla46 yielded 3 positive candidates. Nearly complete sequencing of the respective 16S rRNA genes revealed that the isolates were affiliated with 2 distinct clusters of the genus Pirellula: 1 isolate was obtained from a Mediterranean sponge, 1 from a Caribbean sponge and a third from Caribbean seawater. To our knowledge this is the first report of cultured Planctomycetes from marine sponges. The isolates grew slowly on oligotrophic media and failed to grow on nutrient-rich media. Pirellula sp. Strain 797 was pink-pigmented while the other 2 isolates, 16 and 81, were non-pigmented. Transmission electron microscopy revealed a pear- or droplet-shaped cell morphology that is characteristic of the genus Pirellula. The application of strain-specific oligonucleotide probes to sponge tissue cryosections showed that the isolates contribute only a minor fraction to the total microbial community that is associated with Aplysina spp. sponges
    Type: Article , PeerReviewed
    Format: text
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  • 4
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    Streptomyces axinellae sp. nov., isolated from the Mediterranean sponge Axinella polypoides (Porifera) (2009)
    Society for General Microbiology
    In:  International Journal of Systematic and Evolutionary Microbiology, 59 (6). pp. 1433-1437.
    Details
    Publication Date: 2020-07-28
    Description: An actinomycete strain, isolated from the marine sponge Axinella polypoides collected from Banyuls-sur-Mer, France, was characterized using a polyphasic approach. Based on its chemotaxonomic and morphological characteristics, strain Pol001(T) belongs to the genus Streptomyces. The strain is characterized by ll-diaminopimelic acid in the cell wall, menaquinones MK-9(H(4), H(6), H(8)) and a DNA G+C content of 71.0 mol%. It forms a separate phyletic line based on phylogenetic analyses of the nearly complete 16S rRNA gene sequence. Strain Pol001(T) could be differentiated from other closely related Streptomyces species with validly published names by phenotypic and genotypic analysis. DNA-DNA hybridization between strain Pol001(T) and closely related reference strains further confirmed that strain Pol001(T) represents a novel taxon of the genus Streptomyces. Therefore, it is proposed that strain Pol001(T) represents a novel species in the genus Streptomyces, Streptomyces axinellae sp. nov.; the type strain is Pol001(T) (=DSM 41948(T) =CIP 109838(T)).
    Type: Article , PeerReviewed
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  • 5
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    Saccharopolyspora cebuensis sp. nov., a novel actinomycete isolated from a Philippine sponge (Porifera) (2008)
    Society for General Microbiology
    In:  International Journal of Systematic and Evolutionary Microbiology, 58 (3). pp. 628-632.
    Details
    Publication Date: 2020-07-28
    Description: The taxonomic status of a marine actinomycete isolated from the sponge Haliclona sp. collected from Cebu, Philippines, was established using both phenotypic and genotypic data. Strain SPE 10-1(T) exhibited chemotaxonomic and morphological characteristics that were consistent with those of members of the genus Saccharopolyspora. It showed a strict requirement for salt and is the first obligate marine bacterium of the genus Saccharopolyspora to be isolated. The principal isoprenoid quinone detected was MK-9(H(4)). The fatty acid pattern consisted mainly of terminally branched iso and anteiso fatty acids. The DNA G+C content was 72.6 mol%. Analysis of the 16S rRNA gene sequence supported affiliation of the strain with the genus Saccharopolyspora; the type strain of Saccharopolyspora gregorii was the closest phylogenetic relative (96 % sequence similarity). Sequence similarities of strain SPE 10-1(T) to other type strains of this genus were 93-95 %. It is proposed that strain SPE 10-1(T) should be classified in the genus Saccharopolyspora as a representative of Saccharopolyspora cebuensis sp. nov. The type strain of Saccharopolyspora cebuensis is SPE 10-1(T) (=DSM 45019(T)=CIP 109355(T)).
    Type: Article , PeerReviewed
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