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INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY logo International Journal of Systematic and Evolutionary Microbiology

Volume 73, Issue 4

sp. nov., a novel member of the phylum with an unusual filamentous structure No Access

Abstract

Organisms with distinctive biological features and cellular organization constitute the bacterial phylum . In this study, we formally describe a novel isolate, strain ICT_H6.2, isolated from sediment samples collected in the brackish environment of the Tagus River estuary (Portugal) using an iChip-based culturing technique. The 16S rRNA gene analysis placed this strain into the phylum and family , with a similarity value of 98.0 % to its closest relative Pan181, the currently only known member of the genus. Strain ICT_H6.2 has a genome size of 7.8 Mbp and a DNA G+C content of 59.6 mol %. Strain ICT_H6.2 is heterotrophic, aerobic and capable of microaerobic growth. This strain grows from 10 to 37 °C and from pH 6.5 to 10.0, requires salt to grow, and can tolerate up to 4 % (w/v) NaCl. Diverse nitrogen and carbon sources are utilized for growth. Morphologically, strain ICT_H6.2 is white to beige pigmented, spherical to ovoid in shape and around 1.4×1.1 µm in size. The strain clusters mainly in aggregates and younger cells show motility. Ultrastructural studies showed a cell plan with cytoplasmatic membrane invaginations and unusual filamentous structures with hexagonal organization in transversal section. Morphological, physiological and genomic comparison between strain ICT_H6.2 and its closest relatives strongly suggests it represents a novel species within the genus , for which we propose the name sp. nov., represented by strain ICT_H6.2 as the type strain (=CECT 30574=DSM 114064).

  • Received:
  • Accepted:
  • Published Online:
Keyword(s): biosynthetic gene clusters , CAZymes , filaments with hexagonal arrangement , iChip , Lacipirellulaceae and Tagus River (Portugal)
Funding
This study was supported by the:
  • Norte Portugal Regional Operational Program (NORTE 2020) (Award NORTE-01-0145-FEDER-000040)
    • Principle Award Recipient: NotApplicable
  • Fundação para a Ciência e Tecnologia (Award UIDP/04423/2020)
    • Principle Award Recipient: OlgaMaria Lage
  • Fundação para a Ciência e Tecnologia (Award FCT UIDB/04423/2020)
    • Principle Award Recipient: OlgaMaria Lage
  • Fundação para a Ciência e Tecnologia (PT) (Award SFRH/BD/145577/2019)
    • Principle Award Recipient: InêsRosado Vitorino
© 2023 The Authors
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/content/journal/ijsem/10.1099/ijsem.0.005850
2023-04-20
2025-01-24
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Aeoliella straminimaris sp. nov., a novel member of the phylum Planctomycetota with an unusual filamentous structure
Int J Syst Evol Microbiol 73, 005850 (2023); https://doi.org/10.1099/ijsem.0.005850
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