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Korean Journal of Microbiology (2019) Vol. 55, No. 4, pp. 432-435 pISSN 0440-2413DOI https://doi.org/10.7845/kjm.2019.9136 eISSN 2383-9902Copyright ⓒ 2019, The Microbiological Society of Korea
Complete genome sequence of probiotic Lactobacillus johnsonii
IDCC9203 isolated from infant feces
Tae-Yoon Kim, Byeonghun Lee, Hyuk-Sang Kwon, Jin Seok Moon* , and Sung Ku Choi
Research Laboratories, ILDONG pharmaceutical Co., Ltd., Hwaseong 18449, Republic of Korea
유아 분변에서 분리한 프로바이오틱 Lactobacillus johnsonii IDCC9203의
유전체 염기서열 해독
김태윤 ・ 이병훈 ・ 권혁상 ・ 문진석* ・ 최성구
일동제약 중앙연구소
(Received November 4, 2019; Revised November 13, 2019; Accepted November 13, 2019)
*For correspondence. E-mail: [email protected];
Tel.: +82-31-371-2896; Fax: +82-31-371-2900
Lactobacillus johnsonii IDCC9203 (= KCTC 10923BP) is a
probiotic with anti-inflammatory properties, both in vitro and
in vivo. Here, we report the complete genome sequence of the
IDCC9203 strain, which was isolated from infant feces. The
genome was determined using PacBio and Illumina sequencing.
This strain comprises a circular chromosome of 1,898,461 bp,
and its guanine-cytosine (GC) content is 34.70%. These results
will provide an understanding of this strain’s functional properties
and safety assessments.
Keywords: Lactobacillus johnsonii, anti-inflammatory, infant
feces, probiotics
Lactobacillus johnsonii (Lb. johnsonii) is one of the many
microorganisms that resides in the human intestine. Its beneficial
properties, which include immune-modulation (Kingma et al.,
2011) pathogen inhibition (La Ragione et al., 2004), enhancement
of the epithelial barrier function (Liu et al., 2015), and have
been extensively reported. Lb. johnsonii IDCC9203 was isolated
from infant feces. This strain substantially inhibit the release of
inflammatory mediators such as tumor necrosis factor-α (TNF-α),
Interleukin-6 (IL-6), and IL-1β stimulated the treatment of
RAW 264.7 macrophages with lipopolysaccharide (LPS) (Moon
et al., 2017) and improved the symptoms of dextran sodium
sulfate (DSS) - induced colitis in mice (Je et al., 2018). Despite
the above biotechnological applications of IDCC9203, the
genome sequence of this strain is unknown. Thus, we analyzed
the genome sequence of IDCC9203, and investigated the
genetic characteristics of this strain.
Lb. johnsonii IDCC9203 was grown in Man, Rogosa, and
Sharpe (MRS, Difco Laboratory) broth or agar medium at 37°C
for 18 h. The culture was maintained in 30% glycerol solution
at -70°C until needed. The genomic DNA of IDCC9203 was
extracted from cells after cultivation in MRS medium at 37°C
using a Wizard Genomic DNA Purification Kit (Promega),
following standard protocol recommended by the manufacturer.
Sequencing was performed at the Macrogen using the Pacific
Biosciences (PacBio) RSII SMRT and Illumina sequencing
technologies. First, the PacBio RS II sequencing was used to
generate a 20-kb SMRTbell library. Assembly of the library
using the HGAP3 pipeline yielded one contig. Subsequently,
Illumina sequencing was performed using an Illumina HiSeq
sequencer, and the Canu software (version 1.4) (Koren et al.,
2017) was used to assemble the Illumina library. After assembly,
HiSeq reads were subjected to final polishing to ensure genome
Genome sequence of Lb. johnsonii IDCC9203 ∙ 433
Korean Journal of Microbiology, Vol. 55, No. 4
Fig. 1. Chromosome map of Lactobacillus johnsonii IDCC9203. Marked characteristics are shown from outside to the center; CDS on forward strand, CDS
on reverse strand, tRNA, rRNA, GC content, and GC skew.
sequence accuracy using a tool called Pilon (version 1.21)
(Walker et al., 2014). The consensus sequence with depth of
coverage was generated, by mapping the subread against the
assembled contig. Errors in the single contig were manually
corrected. Finally, the genome sequence of IDCC9203 was
annotated by the Prokka pipeline (version.1.22). Genomic
similarities between the strain IDCC9203 and the type strains
of the genus Lactobacillus were calculated, using the average
nucleotide identity (ANI) calculator at the EZBioCloud website
(www.ezbiocloud.net) (Yoon et al., 2017). Virulence factors and
antibiotic resistance genes were expected using IslandViewer3
(Dhillon et al., 2015) against the virulence factor database
(VFDB) (Chen et al., 2012) and the comprehensive antibiotic
resistance database (CARD) (McArthur et al., 2013).
A total of 141,448 high-quality reads and 1,321,784,216 bp
were generated with an average read length of 9,344 bp.
Assembly of the PacBio library using the HGAP3 pipeline
yielded contig of 1.8 Mb. The assembly results from HiSeq
reads obtained by Canu were mapped against the assembled
PacBio contigs and errors in the single contig, which likely
arose from the higher error rate of PacBio, were manually
corrected. Consequently, this strain has a circular chromosome
(plasmid-free) of 1,898,461 bp with a G + C content of 34.72%
(Fig. 1). The genomic features of strain IDCC9203 are summarized
in Table 1. The ANI value for Lb. johnsonii IDCC9203 and Lb.
johnsonii DSM 33200T
was > 99.00%, indicating that the two
strains are genetically similar; the proposed cut-off for species
boundary is 95.00–96.00% (Yoon et al., 2017). Lb. johnsonii
IDCC9203 harbored many genes (D0Y49_00589, D0Y49_01
323, and D0Y49_01725) that codes for choloylglycine hydrolase
and Nhac gene that codes for the Na+: H
+ antiporter (D0Y49_
01787). These proteins are associated with tolerance to low pH
and bile salts in the human intestine. IDCC9207 contained
genes to encode a few involved in transcriptional regulation,
including 76 transcriptional regulators and the sigma factor
(D0Y49_00488, D0Y49_00626, D0Y49_00878, D0Y49_00879,
434 ∙ Kim et al.
미생물학회지 제55권 제4호
Table 1. Genome features of Lactobacillus johnsonii IDCC9203
Attribute Value
Genome size (bp) 1,898,461
G + C content (%) 34.7
No. of contigs 1 (CP031701.1)
Total genes 1,919
Protein-coding genes 1,685
Pseudogenes 133
rRNAs (5S, 16S, 23S) 21 (7, 7, 7)
tRNAs 77
Other RNAs 3
D0Y49_00880, and D0Y49_01382). Additionally, genes involved
in cell adhesion, such as fibronectin binding protein (D0Y49_
01808), several chaperonins (D0Y49_00940, D0Y49_00941,
and D0Y49_01070) were identified. IDCC9203 also carried
diverse genes encoding heat shock proteins HtpX (D0Y49_
00171 and D0Y49_01299), molecular chaperones DnaJ (D0Y
49_00609), DnaK (D0Y49_00610), GrpE (D0Y49_00611),
GroEL (D0Y49_00612), and Hsp33 (D0Y49_01070). These
proteins are associated with tolerance of the freezing-dry
process for production probiotics. Also, no remarkable virulence-
associated and antibiotic resistance genes were found. The
genomic data on to Lb. johnsonii IDCC9203 provides a genetic
basis to further elucidate its mechanism of anti-inflammatory
activity and will facilitate its application in the functional food
industry.
Nucleotide sequence accession number(s)
Lb. johnsonii IDCC9203 has been deposited in the Korean
Collection for Type Cultures under accession number KCTC
10923BP, and its complete genome sequence has been deposited
in GenBank under accession number CP031701.1.
적 요
Lactobacillus johnsonii 그람양성, 비 운동성이고, 인체의
다양한 환경에서 서식하고 있다. Lb. johnsonii IDCC9203은
항염증 효과가 우수한 균주로서, 유아 분변에서 분리되었다.
IDCC9203 균주의 유전체 길이는 1,898,461 염기쌍, G + C 함
량은 34.7%이었으며, 특징적으로 독성 및 항생제 내성 관련
유전자는 없었다. 이 결과를 기초로 IDCC9203 균주의 프로바
이오틱 및 안전성 관련 유전자를 확인할 수 있었다.
Acknowledgements
This work was supported by Korea Institute of Planning and
Evaluation for Technology in Food, Agriculture, Forestry and
Fisheries (IPET) through High Value-added Food Technology
Development Program, funded by Ministry of Agriculture,
Food and Rural Affairs (MAFRA) (116017032SB010).
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