Phylum XVI. Tenericutes Murray 1984a, 356VP (Effective publication: Murray 1984b, 33.)

Brown, Daniel R.

doi:10.1007/978-0-387-68572-4_5

Cited by 33 publications

(13 citation statements)

References 1,147 publications

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“…The only notable clue was that it had a slight reaction to the antiserum of Spiroplasma mirum SMCA T in the deformation test at 160-fold dilution. Because group placement requires reciprocal positive deformation results at ≥320-fold dilution ( Brown 2010 ) and no molecular phylogenetic inference was performed at that time, the phylogenetic affiliation of S. atrichopogonis has remained unknown. With the availability of its full 16S rRNA gene sequence from our genome sequencing effort, we inferred the phylogenetic placement of S. atrichopogonis ( fig.…”

Section: Resultsmentioning

confidence: 99%

“…In the reciprocal test, S. eriocheiris showed a positive deformation result at 80-fold diluted S. mirum antiserum and S. mirum showed a positive deformation result at 160-fold diluted S. eriocheiris antiserum ( Wang et al 2011 ). As these cross-reactions did not reach the 320-fold dilution threshold ( Brown 2010 ), S. eriocheiris was placed in a novel serological group XLIII that is distinct from the S. mirum (group V).…”

Section: Resultsmentioning

confidence: 99%

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Found and Lost: The Fates of Horizontally Acquired Genes in Arthropod-SymbioticSpiroplasma

Gasparich

Kuo

2015

Genome Biol Evol

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Horizontal gene transfer (HGT) is an important mechanism that contributed to biological diversity, particularly in bacteria. Through acquisition of novel genes, the recipient cell may change its ecological preference and the process could promote speciation. In this study, we determined the complete genome sequence of two Spiroplasma species for comparative analyses and inferred the putative gene gains and losses. Although most Spiroplasma species are symbionts of terrestrial insects, Spiroplasma eriocheiris has evolved to be a lethal pathogen of freshwater crustaceans. We found that approximately 7% of the genes in this genome may have originated from HGT and these genes expanded the metabolic capacity of this organism. Through comparison with the closely related Spiroplasma atrichopogonis, as well as other more divergent lineages, our results indicated that these HGT events could be traced back to the most recent common ancestor of these two species. However, most of these horizontally acquired genes have been pseudogenized in S. atrichopogonis, suggesting that they did not contribute to the fitness of this lineage that maintained the association with terrestrial insects. Thus, accumulation of small deletions that disrupted these foreign genes was not countered by natural selection. On the other hand, the long-term survival of these horizontally acquired genes in the S. eriocheiris genome hinted that they might play a role in the ecological shift of this species. Finally, the implications of these findings and the conflicts among gene content, 16S rRNA gene sequencing, and serological typing, are discussed in light of defining bacterial species.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Found and Lost: The Fates of Horizontally Acquired Genes in Arthropod-SymbioticSpiroplasma

Gasparich

Kuo

2015

Genome Biol Evol

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“…Phytoplasmas are a group of insect-transmitted plant-pathogenic bacteria that reduce yields of diverse crops worldwide ( Lee et al, 2000 ; Hogenhout et al, 2008 ; Bertaccini and Lee, 2018 ). These obligate parasites are related to the animal-pathogenic mycoplasmas ( Chen et al, 2012 ), and both groups of these wall-less bacteria were assigned to the class Mollicutes under the phylum Tenericutes ( Brown, 2010 ). However, unlike mycoplasmas and several other Mollicutes lineages, pure culture of phytoplasmas outside of their hosts has not been achieved yet.…”

Section: Introductionmentioning

confidence: 99%

Species Boundaries and Molecular Markers for the Classification of 16SrI Phytoplasmas Inferred by Genome Analysis

et al. 2020

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“…Moreover, reclassifications of phylum- or class-level taxa have been often carried out in the phylum Firmicutes [e.g. the phyla ‘ Synergistetes ’ (Jumas-Bilak et al , 2009) and ‘ Tenericutes ’ (Brown, 2010), and classes Negativicutes (Marchandin et al , 2010) and Erysipelotrichia (Ludwig et al , 2009a)]. The taxonomic status of many bacteria in the phylum Firmicutes remains controversial, because of the polyphyly of this group (Ludwig et al , 2009b).…”

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confidence: 99%

Limnochorda pilosa gen. nov., sp. nov., a moderately thermophilic, facultatively anaerobic, pleomorphic bacterium and proposal of Limnochordaceae fam. nov., Limnochordales ord. nov. and Limnochordia classis nov. in the phylum Firmicutes

Watanabe

Kojima

Fukui

2015

International Journal of Systematic and Evolutionary Microbiology

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The Institute of Low Temperature Science, Hokkaido University, Sapporo, Hokkaido, Japan A novel facultatively anaerobic bacterium, strain HC45 T , was isolated from sediment of a brackish meromictic lake in Japan, Lake Harutori. Cells were pleomorphic, and filamentous bodies were 5-100 mm in length. For growth, the optimum pH was 7.0 and the optimum temperature was 45-50 8C. The G+C content of the genomic DNA was 71 mol%. iso-C 15 : 0 and anteiso-C 15 : 0 were the major components in the cellular fatty acid profile. The predominant respiratory quinone was MK-7. Strain HC45 T shared very low 16S rRNA gene sequence similarity with cultivated strains (#85 %). Phylogenetic analysis based on 16S rRNA gene sequences revealed that the isolate was distantly related to members of the family Symbiobacteriaceae and family XVII Incertae Sedis in the class Clostridia, and they formed a cluster separate from canonical species of the phylum Firmicutes. These results indicated that strain HC45 T should not be placed in any existing class of the phylum Firmicutes. On the basis of phylogenetic and phenotypic characterization, Limnochorda pilosa gen. nov., sp. nov. is proposed with HC45 T (5NBRC 110152 T 5DSM 28787 T ) as the type strain, as the first representative of novel taxa, Limnochordales ord. nov., Limnochordaceae fam. nov. in Limnochordia classis. nov.

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Phylum XVI. Tenericutes Murray 1984a, 356VP (Effective publication: Murray 1984b, 33.)

Cited by 33 publications

References 1,147 publications

Found and Lost: The Fates of Horizontally Acquired Genes in Arthropod-SymbioticSpiroplasma

Found and Lost: The Fates of Horizontally Acquired Genes in Arthropod-SymbioticSpiroplasma

Species Boundaries and Molecular Markers for the Classification of 16SrI Phytoplasmas Inferred by Genome Analysis

Limnochorda pilosa gen. nov., sp. nov., a moderately thermophilic, facultatively anaerobic, pleomorphic bacterium and proposal of Limnochordaceae fam. nov., Limnochordales ord. nov. and Limnochordia classis nov. in the phylum Firmicutes

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