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Genome Sequences

Draft Genome Sequences of Six Lactobacillus gasseri and Three Lactobacillus paragasseri Strains Isolated from the Female Bladder

Catherine Putonti, Virina Akhnoukh, Zoe Anagnostopoulos, Maria Bilek, John Colgan, Samir El Idrissi, Karolina Magnuszewski, Steven Marino, Matthew Szymulewski, Megan Tyahla, Viktoriya Yanchuk, Taylor Miller-Ensminger, Mary Batrich, Bridget Brassil, Rita Mormando, Genevieve Johnson, Alan J. Wolfe
Frank J. Stewart, Editor
Catherine Putonti
aBioinformatics Program, Loyola University Chicago, Chicago, Illinois, USA
bDepartment of Biology, Loyola University Chicago, Chicago, Illinois, USA
cDepartment of Computer Science, Loyola University Chicago, Chicago, Illinois, USA
dDepartment of Microbiology and Immunology, Stritch School of Medicine, Loyola University Chicago, Maywood, Illinois, USA
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Virina Akhnoukh
eDepartment of Chemistry and Biochemistry, Loyola University Chicago, Chicago, Illinois, USA
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Zoe Anagnostopoulos
bDepartment of Biology, Loyola University Chicago, Chicago, Illinois, USA
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Maria Bilek
bDepartment of Biology, Loyola University Chicago, Chicago, Illinois, USA
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John Colgan
bDepartment of Biology, Loyola University Chicago, Chicago, Illinois, USA
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Samir El Idrissi
bDepartment of Biology, Loyola University Chicago, Chicago, Illinois, USA
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Karolina Magnuszewski
bDepartment of Biology, Loyola University Chicago, Chicago, Illinois, USA
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Steven Marino
bDepartment of Biology, Loyola University Chicago, Chicago, Illinois, USA
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Matthew Szymulewski
bDepartment of Biology, Loyola University Chicago, Chicago, Illinois, USA
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Megan Tyahla
bDepartment of Biology, Loyola University Chicago, Chicago, Illinois, USA
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Viktoriya Yanchuk
bDepartment of Biology, Loyola University Chicago, Chicago, Illinois, USA
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Taylor Miller-Ensminger
aBioinformatics Program, Loyola University Chicago, Chicago, Illinois, USA
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Mary Batrich
fNiehoff School of Nursing, Stritch School of Medicine, Loyola University Chicago, Maywood, Illinois, USA
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Bridget Brassil
bDepartment of Biology, Loyola University Chicago, Chicago, Illinois, USA
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Rita Mormando
aBioinformatics Program, Loyola University Chicago, Chicago, Illinois, USA
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Genevieve Johnson
aBioinformatics Program, Loyola University Chicago, Chicago, Illinois, USA
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Alan J. Wolfe
dDepartment of Microbiology and Immunology, Stritch School of Medicine, Loyola University Chicago, Maywood, Illinois, USA
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Frank J. Stewart
Georgia Institute of Technology
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DOI: 10.1128/MRA.00973-19
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ABSTRACT

Lactobacilli are dominant members of the healthy female bladder microbiota. Here, we report the complete genome sequences of six Lactobacillus gasseri and three Lactobacillus paragasseri strains isolated from catheterized urine samples. These L. paragasseri genomes are the first publicly available sequences of the species from the bladder.

ANNOUNCEMENT

Lactobacillus is a commensal bacterium in the human body and is a key component of the healthy urinary and vaginal microbiota (1). The family Lactobacillaceae has one of the highest rates of incidence compared to those of other bacterial families in the urinary tract (2). Lactobacillus gasseri is a predominant species in the human microbiota and is able to prevent other bacteria from growing in the same environment, protecting the host from pathogens (3). Lactobacillus paragasseri was classified as a novel species in 2018 (4) and, until now, has not been characterized in the urinary tract.

Catheterized urine samples were collected from women as part of prior institutional review board (IRB)-approved studies (5–9). Bacteria were isolated from these samples using the enhanced quantitative urine culture (EQUC) method (9) and stored at −80°C. We selected nine strains in our collection for whole-genome sequencing; these strains were identified as L. gasseri by matrix-assisted laser desorption ionization–time of flight mass spectrometry (MALDI-TOF) mass spectrometry. Freezer stocks for each of the nine strains were first streaked on Columbia colistin-nalidixic acid agar with 5% sheep blood plates (catalog number 221353; BD) and incubated at 35°C in 5% CO2 for 48 hours. A single colony was then selected and grown in MRS liquid medium at 35°C in 5% CO2 for 48 hours. DNA was extracted with the Qiagen DNeasy UltraClean microbial kit, and the DNA was quantified by a Qubit fluorometer. DNA libraries were constructed (Nextera XT library prep kit) and sequenced using the MiSeq reagent kit v2, producing 250-bp paired-end reads (minimum, 266,494 pairs; maximum, 1,342,972 pairs; average, 524,976 pairs). The raw reads were trimmed using Sickle v1.33 (https://github.com/najoshi/sickle) and then assembled with SPAdes v3.13.0 (10) (parameters, “only-assembler” option for k = 55, 77, 99, and 127). The assembled contigs were evaluated for genome completeness and contamination by CheckM v1.0.12 (11), and genome coverage was calculated using BBMap v38.47 (https://sourceforge.net/projects/bbmap/). Genome annotations were performed using PATRIC v3.5.43 (12) and the NCBI Prokaryotic Genome Annotation Pipeline (PGAP) v4.8 (13). The PGAP annotations are published with the deposited genome assemblies. A phylogenetic tree was derived with RAxML v8.2.11 in PATRIC using the PATRIC annotations and the codon tree method (12). Unless otherwise noted, default parameters were used for all software tools.

The nine bladder lactobacilli genomes vary in size from 1,041,937 bp (strain UMB1399) to 2,108,391 bp (strain UMB6975) in length, with an average GC content of 35.2%. Assembly statistics are listed in Fig. 1A. Genome assemblies for lactobacilli are particularly challenging given the presence of numerous short repeats throughout the genome (14). As part of NCBI’s quality control process, average nucleotide identity is calculated (15), and three of the genomes (UMB0596, UMB1065, and UMB6975) were reclassified as strains of the species L. paragasseri (98 to 99% identical for over 94% of the genome to the type genome of L. paragasseri (strain JCM 5343 [GenBank accession number AP018549]). The nine bladder lactobacillus genomes were also compared with those of publicly available L. gasseri and L. paragasseri strains in PATRIC (as of July 2019). Figure 1B shows a phylogenetic analysis of these genome comparisons. There is a clear distinction between the six bladder L. gasseri and three bladder L. paragasseri strains. From our phylogenetic analysis, we have identified not only three new strains of L. paragasseri but also other strains presently classified as L. gasseri that are likely members of the L. paragasseri species (Fig. 1B; branches shown in orange).

FIG 1
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FIG 1

Genome assembly statistics (A) and phylogenetic tree (B) of six L. gasseri and three L. paragasseri strains. Genomes sequenced in this study are shown in blue. Branches belonging to the L. gasseri clade are shown in purple, and the L. paragasseri clade’s branches are shown in orange.

Data availability.This whole-genome shotgun project has been deposited in GenBank under the accession numbers VNFS00000000 (UMB4205), VNFT00000000 (UMB2965), VNFU00000000 (UMB1196), VNFY00000000 (UMB0607), VNGC00000000 (UMB3077), and VNGD00000000 (UMB1399) for the six L. gasseri strains and VNFQ00000000 (UMB0596), VNFV00000000 (UMB1065), and VNFX00000000 (UMB6975) for the three L. paragasseri strains. The versions described in this paper are the first versions. Raw sequence data are publicly available for the six L. gasseri strains (SRA accession numbers SRR9695707, SRR9695712, SRR9695713, SRR9695714, SRR9695719, and SRR9695724) and the three L. paragasseri strains (accession numbers SRR9695720, SRR9695721, and SRR9695723).

ACKNOWLEDGMENTS

This work was conducted as part of Loyola University of Chicago’s Department of Biology Bacterial Genomics course.

For prior patient recruitment, we acknowledge the Loyola Urinary Education and Research Collaborative (LUEREC) and the patients who provided the samples for this study. We also thank Roberto Limeira at Loyola’s Genomics Facility for his assistance in sequencing these isolates.

T.M.-E. is funded through Loyola’s Carbon Research Fellowship.

FOOTNOTES

    • Received 10 August 2019.
    • Accepted 14 August 2019.
    • Published 12 September 2019.
  • Copyright © 2019 Putonti 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 Sequences of Six Lactobacillus gasseri and Three Lactobacillus paragasseri Strains Isolated from the Female Bladder
Catherine Putonti, Virina Akhnoukh, Zoe Anagnostopoulos, Maria Bilek, John Colgan, Samir El Idrissi, Karolina Magnuszewski, Steven Marino, Matthew Szymulewski, Megan Tyahla, Viktoriya Yanchuk, Taylor Miller-Ensminger, Mary Batrich, Bridget Brassil, Rita Mormando, Genevieve Johnson, Alan J. Wolfe
Microbiology Resource Announcements Sep 2019, 8 (37) e00973-19; DOI: 10.1128/MRA.00973-19

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Draft Genome Sequences of Six Lactobacillus gasseri and Three Lactobacillus paragasseri Strains Isolated from the Female Bladder
Catherine Putonti, Virina Akhnoukh, Zoe Anagnostopoulos, Maria Bilek, John Colgan, Samir El Idrissi, Karolina Magnuszewski, Steven Marino, Matthew Szymulewski, Megan Tyahla, Viktoriya Yanchuk, Taylor Miller-Ensminger, Mary Batrich, Bridget Brassil, Rita Mormando, Genevieve Johnson, Alan J. Wolfe
Microbiology Resource Announcements Sep 2019, 8 (37) e00973-19; DOI: 10.1128/MRA.00973-19
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