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Exploring the diversity and metabolic potential of actinomycetes from temperate marine sediments from Newfoundland, Canada

Lookup NU author(s): Dr Katherine DuncanORCiD

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Abstract

© 2014, Society for Industrial Microbiology and Biotechnology. Marine sediments from Newfoundland, Canada were explored for biotechnologically promising Actinobacteria using culture-independent and culture-dependent approaches. Culture-independent pyrosequencing analyses uncovered significant actinobacterial diversity (H′—2.45 to 3.76), although the taxonomic diversity of biotechnologically important actinomycetes could not be fully elucidated due to limited sampling depth. Assessment of culturable actinomycete diversity resulted in the isolation of 360 actinomycetes representing 59 operational taxonomic units, the majority of which (94 %) were Streptomyces. The biotechnological potential of actinomycetes from NL sediments was assessed by bioactivity and metabolomics-based screening of 32 representative isolates. Bioactivity was exhibited by 41 % of isolates, while 11 % exhibited unique chemical signatures in metabolomics screening. Chemical analysis of two isolates resulted in the isolation of the cytotoxic metabolite 1-isopentadecanoyl-3β-d-glucopyranosyl-X-glycerol from Actinoalloteichus sp. 2L868 and sungsanpin from Streptomyces sp. 8LB7. These results demonstrate the potential for the discovery of novel bioactive metabolites from actinomycetes isolated from Atlantic Canadian marine sediments.

Publication metadata

Author(s): Duncan KR, Haltli B, Gill KA, Correa H, Berrue F, Kerr RG

Publication type: Article

Publication status: Published

Journal: Journal of Industrial Microbiology and Biotechnology

Year: 2015

Volume: 42

Issue: 1

Pages: 57-72

Print publication date: 01/01/2015

Online publication date: 01/01/2015

Acceptance date: 17/10/2014

ISSN (print): 1367-5435

ISSN (electronic): 1476-5535

Publisher: Springer Verlag

URL: https://doi.org/10.1007/s10295-014-1529-x

DOI: 10.1007/s10295-014-1529-x

PubMed id: 25371290

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