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Schaalia odontolytica

ABSTRACT: Normal oral and gastrointestinal bacterium

PROVIDER: PRJNA34981 | ENA |

REPOSITORIES: ENA

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			Action	DRS
		Other
	SRR022549.fastq.gz	Fastqsanger.gz
	SRR022549_1.fastq.gz	Fastqsanger.gz
	SRR022549_2.fastq.gz	Fastqsanger.gz
	SRR022550.fastq.gz	Fastqsanger.gz

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Complete genome sequence of Schaalia odontolytica isolated from subgingival biofilm.

Project description:ObjectiveRecent advancements in genome-based taxonomic classification propose the reclassification of certain Actinomyces species into new genera, including Schaalia. Schaalia odontolytica, the type species within this genus, is frequently found in the human oral cavity and has been associated with actinomycotic lesions. Currently, only two complete genomes of S. odontolytica strains have been reported. Recognizing the limited research on subspecies-level variation of S. odontolytica, we conducted genome sequencing of strain KHUD_008, isolated from a Korean periodontitis patient's subgingival biofilm. Additionally, we performed a comparative genome analysis using previously sequenced genomes of strain XH001 and strain FDAARGOS_732, both derived from the human oral cavity.Data descriptionPacific Biosciences Sequel II sequencing generated 15,904 and 76,557 raw sequencing sub-reads, which were integrated to assemble the de novo genome using the Microbial Genome Analysis pipeline in the Single-Molecule Real-Time Analysis. The genome assembly completeness, assessed by Benchmarking Universal Single-Copy Orthologs, reached 99.2%. The genome is 2,389,595 bp with a GC content of 66.37%, and contains 2,002 protein-coding genes, 9 rRNAs, and 48 tRNA. Comparative analysis with two previously sequenced strains revealed many strain-specific genes in KHUD_008, primarily related to envelope biogenesis and replication/recombination/repair processes.

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Identifying essential genes in Schaalia odontolytica using a highly-saturated transposon library.

Project description:The unique epibiotic-parasitic relationship between Nanosynbacter lyticus type strain TM7x, a member of the newly identified Candidate Phyla Radiation, now referred to as Patescibacteria, and its basibiont, Schaalia odontolytica strain XH001 (formerly Actinomyces odontolyticus), require more powerful genetic tools for deeper understanding of the genetic underpinnings that mediate their obligate relationship. Previous studies have mainly characterized the genomic landscape of XH001 during or post TM7x infection through comparative genomic or transcriptomic analyses followed by phenotypic analysis. Comprehensive genetic dissection of the pair is currently cumbersome due to the lack of robust genetic tools in TM7x. However, basic genetic tools are available for XH001 and this study expands the current genetic toolset by developing high-throughput transposon insertion sequencing (Tn-seq). Tn-seq was employed to screen for essential genes in XH001 under laboratory conditions. A highly saturated Tn-seq library was generated with nearly 660,000 unique insertion mutations, averaging one insertion every 2-3 nucleotides. 203 genes, 10.5% of the XH001 genome, were identified as putatively essential.

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