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Genome Sequences

Complete Genome Sequence of Megamonas funiformis JCM 14723T

Dieter M. Tourlousse, Mitsuo Sakamoto, Takamasa Miura, Koji Narita, Akiko Ohashi, Yoshihito Uchino, Atsushi Yamazoe, Keishi Kameyama, Jun Terauchi, Moriya Ohkuma, Hiroko Kawasaki, Yuji Sekiguchi
Catherine Putonti, Editor
Dieter M. Tourlousse
aBiomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan
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Mitsuo Sakamoto
bMicrobe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan
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  • ORCID record for Mitsuo Sakamoto
Takamasa Miura
cBiological Resource Center, National Institute of Technology and Evaluation (NITE), Kisarazu, Chiba, Japan
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Koji Narita
dJapan Microbiome Consortium (JMBC), Osaka, Osaka, Japan
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Akiko Ohashi
aBiomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan
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Yoshihito Uchino
cBiological Resource Center, National Institute of Technology and Evaluation (NITE), Kisarazu, Chiba, Japan
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Atsushi Yamazoe
cBiological Resource Center, National Institute of Technology and Evaluation (NITE), Kisarazu, Chiba, Japan
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Keishi Kameyama
dJapan Microbiome Consortium (JMBC), Osaka, Osaka, Japan
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Jun Terauchi
dJapan Microbiome Consortium (JMBC), Osaka, Osaka, Japan
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Moriya Ohkuma
bMicrobe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan
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Hiroko Kawasaki
cBiological Resource Center, National Institute of Technology and Evaluation (NITE), Kisarazu, Chiba, Japan
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Yuji Sekiguchi
aBiomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan
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Catherine Putonti
Loyola University Chicago
Roles: Editor
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DOI: 10.1128/MRA.00142-20
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ABSTRACT

We announce the complete genome sequence of Megamonas funiformis JCM 14723T (YIT 11815T). The genome consists of a circular chromosome (2,522,577 bp, 31.5% G+C content) and a plasmid of 46,189 bp (29.4% G+C content). The genome was predicted to contain 6 rRNA operons, 53 tRNA genes, and 2,440 protein-coding sequences.

ANNOUNCEMENT

Megamonas funiformis, originally isolated from human feces of healthy Japanese males (1), is one of three described species of the Megamonas genus within the family Selenomonadaceae. Limited information is available about the prevalence and role of this species in the human gastrointestinal tract. One study reported reduced abundance in the feces of patients with multiple system atrophy (2). To address the lack of complete genome sequences of M. funiformis, we determined a complete genome sequence of M. funiformis JCM 14723T (YIT 11815T), the authentic type strain of this species (1).

Cells of strain JCM 14723T were obtained from the Japan Collection of Microorganisms and cultured at 37°C for 36 h in modified Gifu anaerobic medium (GAM broth) with 1% glucose under an N2 atmosphere. The EZ1 DNA tissue kit (Qiagen) was used for DNA purification, following cell lysis by bead beating. The TruSeq Nano DNA kit was used to generate short-read libraries, and sequencing was performed on a MiSeq instrument using v2 chemistry (2 × 251-bp reads); estimated coverage was ∼320×. Quality control of the reads was performed with Trimmomatic v0.38 (3). Libraries for Oxford Nanopore Technologies (ONT) sequencing were prepared with a ligation sequencing kit (SQK-LSK109) and native barcoding expansion pack (EXP-NBD104). Sequencing employed an R9.4.1 flow cell (FLO-MIN106) and the MinION device. Base calling of ONT reads was performed with Guppy v3.1.5 (ONT) in high-accuracy mode, with simultaneous library demultiplexing and read trimming; reads with a Q score of <9 and size of <1,000 bp were discarded using NanoFilt v2.5.0 (4). Filtlong v0.2.0 (https://github.com/rrwick/Filtlong) was then used to identify high-quality ONT reads by using the Illumina reads as references and discarding the 10% poorest read bases. A total of 88,322 ONT reads (N50, 5,833 bp; coverage, ∼170×) were used to generate a long-read assembly using Flye v2.5 (5). This assembly was used together with the Illumina reads (3,364,679 total reads) to generate a hybrid assembly using Unicycler v0.4.7 (6), run with default settings, including error correction using Pilon. Annotation was performed with the NCBI Prokaryotic Genome Annotation Pipeline v4.11 (7).

The genome of M. funiformis JCM 14723T consists of a 2,522,577-bp chromosome (G+C content, 31.5%) and an extrachromosomal element of 46,189 bp (G+C content, 29.4%); both elements were indicated as circular by Flye/Unicycler. The 46-kbp element may represent a conjugative plasmid based on the identification of genes encoding relaxase, the type IV secretion system, and the type IV coupling protein by oriTfinder (8). The chromosome was predicted to contain 6 sets of rRNA genes and 53 tRNA genes and encode 2,385 proteins; the plasmid harbored 55 protein-coding sequences. This genome sequence will contribute to our understanding of the ecology of M. funiformis and its interactions with the human host by providing a picture of the functional potential encoded in the genome of M. funiformis JCM 14723T.

Data availability.This genome sequence is available in DDBJ/EMBL/GenBank under accession numbers CP048627 (chromosome) and CP048628 (plasmid). Raw ONT and Illumina sequencing reads have been deposited in the Sequence Read Archive (SRA) under accession numbers SRR10968457 and SRR10968460, respectively.

ACKNOWLEDGMENT

This research was supported by the New Energy and Industrial Technology Development Organization (NEDO), Japan, as part of a research program for establishing standards in human microbiome measurements.

FOOTNOTES

    • Received 17 February 2020.
    • Accepted 29 March 2020.
    • Published 16 April 2020.
  • Copyright © 2020 Tourlousse 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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Complete Genome Sequence of Megamonas funiformis JCM 14723T
Dieter M. Tourlousse, Mitsuo Sakamoto, Takamasa Miura, Koji Narita, Akiko Ohashi, Yoshihito Uchino, Atsushi Yamazoe, Keishi Kameyama, Jun Terauchi, Moriya Ohkuma, Hiroko Kawasaki, Yuji Sekiguchi
Microbiology Resource Announcements Apr 2020, 9 (16) e00142-20; DOI: 10.1128/MRA.00142-20

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Complete Genome Sequence of Megamonas funiformis JCM 14723T
Dieter M. Tourlousse, Mitsuo Sakamoto, Takamasa Miura, Koji Narita, Akiko Ohashi, Yoshihito Uchino, Atsushi Yamazoe, Keishi Kameyama, Jun Terauchi, Moriya Ohkuma, Hiroko Kawasaki, Yuji Sekiguchi
Microbiology Resource Announcements Apr 2020, 9 (16) e00142-20; DOI: 10.1128/MRA.00142-20
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