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TitlePreviously uncharacterized rectangular bacterial structures in the dolphin mouth.
Journal, issue, pagesNat Commun, Vol. 14, Issue 1, Page 2098, Year 2023
Publish dateApr 13, 2023
AuthorsNatasha K Dudek / Jesus G Galaz-Montoya / Handuo Shi / Megan Mayer / Cristina Danita / Arianna I Celis / Tobias Viehboeck / Gong-Her Wu / Barry Behr / Silvia Bulgheresi / Kerwyn Casey Huang / Wah Chiu / David A Relman /
PubMed AbstractMuch remains to be explored regarding the diversity of uncultured, host-associated microbes. Here, we describe rectangular bacterial structures (RBSs) in the mouths of bottlenose dolphins. DNA ...Much remains to be explored regarding the diversity of uncultured, host-associated microbes. Here, we describe rectangular bacterial structures (RBSs) in the mouths of bottlenose dolphins. DNA staining revealed multiple paired bands within RBSs, suggesting the presence of cells dividing along the longitudinal axis. Cryogenic transmission electron microscopy and tomography showed parallel membrane-bound segments that are likely cells, encapsulated by an S-layer-like periodic surface covering. RBSs displayed unusual pilus-like appendages with bundles of threads splayed at the tips. We present multiple lines of evidence, including genomic DNA sequencing of micromanipulated RBSs, 16S rRNA gene sequencing, and fluorescence in situ hybridization, suggesting that RBSs are bacterial and distinct from the genera Simonsiella and Conchiformibius (family Neisseriaceae), with which they share similar morphology and division patterning. Our findings highlight the diversity of novel microbial forms and lifestyles that await characterization using tools complementary to genomics such as microscopy.
External linksNat Commun / PubMed:37055390 / PubMed Central
MethodsEM (tomography)
Structure data

EMDB-25419: Previously uncharacterized rectangular bacteria in the dolphin mouth
Method: EM (tomography)

Source
  • unidentified (others)

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