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Genome Sequences

Draft Genome Sequence of Porphyromonas gingivalis Strain 381 Okayama (381OKJP) Stock Culture

Anthony C. May, Hiroshi Maeda, Hidemi Kurihara, Manabu Miyamoto, Hiroshi Hongyo, Ichiro Tanimoto, Atsushi Nagai, Fusanori Nishimura, Yoji Murayama, Keijiro Kato, Susumu Kokeguchi, Carla Cugini
Julie C. Dunning Hotopp, Editor
Anthony C. May
aDepartment of Oral Biology, Rutgers School of Dental Medicine, Newark, New Jersey, USA
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Hiroshi Maeda
bDepartment of Endodontics, Osaka Dental University, Hirakata, Osaka, Japan
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Hidemi Kurihara
cDepartment of Periodontal Medicine, Graduate School of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan
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Manabu Miyamoto
dMiyamoto Dental & Orthodontic Office, Kobe, Hyogo, Japan
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Hiroshi Hongyo
eTanpopo Dental Clinic, Soja, Okayama, Japan
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Ichiro Tanimoto
fNational Sanatorium Oshima Seisho-en, Takamatsu, Kagawa, Japan
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Atsushi Nagai
gRegional Liaison Center, Fukuoka Dental College, Fukuoka, Japan
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Fusanori Nishimura
hSection of Periodontology, Division of Oral Rehabilitation, Kyushu University Faculty of Dental Science, Fukuoka, Japan
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Yoji Murayama
iDepartment of Pathophysiology-Periodontal Science, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
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Keijiro Kato
jDepartment of Oral Microbiology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
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Susumu Kokeguchi
jDepartment of Oral Microbiology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
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Carla Cugini
aDepartment of Oral Biology, Rutgers School of Dental Medicine, Newark, New Jersey, USA
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Julie C. Dunning Hotopp
University of Maryland School of Medicine
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DOI: 10.1128/MRA.01641-18
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ABSTRACT

We report the draft genome sequence of Porphyromonas gingivalis strain 381 Okayama (381OKJP). The strain, obtained from the Socransky collection, has been used for experimentation since 1987. This sequence allows for comparisons to other sequenced 381 strains to observe acquisition of mutations and genome rearrangements in a commonly used laboratory strain.

ANNOUNCEMENT

The Gram-negative anaerobe Porphyromonas gingivalis is recognized as a key oral pathobiont associated with human periodontitis. P. gingivalis strain 381, isolated at the Forsyth Institute (ca. 1970s), is a globally distributed legacy strain extensively used in oral microbiology research. Strain 381OKJP, stored in Japan for ∼40 years, displays location-dependent genetic and phenotypic variability, likely due to interlaboratory exchange (1–8). Recently, the Progulske-Fox group reported the genome sequence for strain 381, which based on genome cluster analysis and gene order revealed the strain to be closely related to ATCC 33277 (9). Strain 381OKJP, selected for this analysis, a generous gift from Sigmund S. Socransky (ca. 1987), was originally deposited in the culture collection at the Department of Oral Microbiology at the Okayama University Dental School (10). Strain 381OKJP (fimA genotype V, mfa1 genotype II [53-kDa Mfa1], ISPg4) is phenotypically distinct from the previously reported strain 381 (fimA genotype I, mfa1 genotype I [67/75-kDa Mfa1], no ISPg4). This study confirms the worldwide distribution of variable 381 strains. The genome sequence of 381OKJP will provide for strain comparisons and analyses of genome rearrangements and information related to 381OKJP-specific phenotypic characteristics.

P. gingivalis 381OKJP was cultured in duplicate at 37°C in Gifu anaerobic medium (GAM) broth, modified (Nissui Pharmaceutical Co., Japan), containing 10 μg/ml hemin and 5 μg/ml vitamin K1 under anaerobic conditions (<0.1% oxygen, >15% CO2) in a GasPak 100 jar (Becton, Dickinson, USA) with an AnaeroPack-Anaero generator (Mitsubishi Gas Chemical Company, Japan). Cells were collected by centrifugation and washed twice with Gibco phosphate-buffered saline (Thermo Fisher Scientific, Japan). Genomic DNA from two independent samples was extracted and purified using a NucleoSpin tissue kit (TaKaRa Bio, Japan), according to the manufacturer’s instructions.

Genomic libraries containing 150- to 550-bp inserts were constructed using the Kapa HyperPlus library kit. The duplicate libraries were independently paired-end sequenced using the Illumina MiSeq platform, and run statistics were determined using CLC Genomics Workbench (version 9.0.1; CLC Bio) (Table 1). The A5-miseq assembly pipeline was used to automate read trimming and adapter removal from the paired-end FASTQ data and to assemble the reads into contigs (version 20160826) (11, 12). QUAST was used to check the quality of each assembly and compare contigs to previously published genomes available from the NCBI (13). The independent genomes were aligned against each other with progressiveMauve, and the Mauve Contig Mover was used iteratively to infer contig order (version 2.4.0 [14]). The final draft genome reported here contains 1,296,214 reads (N50, 44,243 bp), producing 128 contigs with 75.89-fold coverage for error-corrected bases.

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TABLE 1

Run statistics for duplicate P. gingivalis 381OKJP samples

The final assembly resulted in 2,331,065 bp, with a GC content of 48.4%, consistent with NBCI-deposited P. gingivalis genomes. To confirm taxonomic classification and identify lateral gene transfer events, all scaffolds were aligned to the nonredundant-microbial_20140513 reference database using the LAST algorithm with the Taxator toolkit (v1.3.3e [15]; v938 [16]). Taxonomic classification was supported by 1,720,921 bp, and all assigned sample sequence segments were homologous to those of P. gingivalis. Annotation was performed by the NCBI using the Prokaryotic Genome Annotation Pipeline (PGAP; best-placed reference protein, version 4.2 [17]).

Data availability.This whole-genome shotgun project has been deposited at DDBJ/ENA/GenBank under the accession number QPGS00000000. The version described in this paper is version QPGS01000000. The raw reads have been deposited at the NCBI/SRA under BioProject number PRJNA475798.

ACKNOWLEDGMENTS

This work was supported in part by the Okayama University Hospital Biobank (Okadai Biobank), Japan, and JSPS KAKENHI grants JP15K11404 (to H.M. and S.K.) and 17K12008 (to S.K.). C.C. and A.C.M. were supported in part by New Jersey Health Foundation grant PC50-16 awarded to C.C.

We acknowledge the Office of Advanced Resource Computing (OARC) at Rutgers, The State University of New Jersey, for providing access to the Amarel cluster and associated research computing resources that have contributed to the results reported.

We dedicate this paper to the memory of our mentor, Keijiro Kato, who passed away on 19 April 2018.

FOOTNOTES

    • Received 4 December 2018.
    • Accepted 24 January 2019.
    • Published 28 February 2019.
  • Copyright © 2019 May et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International license.

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Draft Genome Sequence of Porphyromonas gingivalis Strain 381 Okayama (381OKJP) Stock Culture
Anthony C. May, Hiroshi Maeda, Hidemi Kurihara, Manabu Miyamoto, Hiroshi Hongyo, Ichiro Tanimoto, Atsushi Nagai, Fusanori Nishimura, Yoji Murayama, Keijiro Kato, Susumu Kokeguchi, Carla Cugini
Microbiology Resource Announcements Feb 2019, 8 (9) e01641-18; DOI: 10.1128/MRA.01641-18

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Draft Genome Sequence of Porphyromonas gingivalis Strain 381 Okayama (381OKJP) Stock Culture
Anthony C. May, Hiroshi Maeda, Hidemi Kurihara, Manabu Miyamoto, Hiroshi Hongyo, Ichiro Tanimoto, Atsushi Nagai, Fusanori Nishimura, Yoji Murayama, Keijiro Kato, Susumu Kokeguchi, Carla Cugini
Microbiology Resource Announcements Feb 2019, 8 (9) e01641-18; DOI: 10.1128/MRA.01641-18
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