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Viruses

Seven Bacteriophages Isolated from the Female Urinary Microbiota

Kema Malki, Emily Sible, Alexandria Cooper, Andrea Garretto, Katherine Bruder, Siobhan C. Watkins, Catherine Putonti
Kema Malki
aDepartment of Biology, Loyola University Chicago, Chicago, Illinois, USA
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Emily Sible
aDepartment of Biology, Loyola University Chicago, Chicago, Illinois, USA
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Alexandria Cooper
aDepartment of Biology, Loyola University Chicago, Chicago, Illinois, USA
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Andrea Garretto
bBioinformatics Program, Loyola University Chicago, Chicago, Illinois, USA
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Katherine Bruder
aDepartment of Biology, Loyola University Chicago, Chicago, Illinois, USA
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Siobhan C. Watkins
aDepartment of Biology, Loyola University Chicago, Chicago, Illinois, USA
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Catherine Putonti
aDepartment of Biology, Loyola University Chicago, Chicago, Illinois, USA
bBioinformatics Program, Loyola University Chicago, Chicago, Illinois, USA
cDepartment of Computer Science, Loyola University Chicago, Chicago, Illinois, USA
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DOI: 10.1128/genomeA.01003-16
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ABSTRACT

Recent research has debunked the myth that urine is sterile, having uncovered bacteria within the bladders of healthy individuals. However, the identity, diversity, and putative roles of bacteriophages in the bladder are unknown. We report the draft genome sequences of seven bacteriophages isolated from microbial communities from adult female bladders.

GENOME ANNOUNCEMENT

Recently, we found seven phages from the bladders of four adult women with urge urinary incontinence (UUI) (1). Four independent bacterial cultures were grown in tryptic soy broth under anaerobic conditions at 37°C for 48 h. Supernatant was spotted (10 µl) on overlay plates of Escherichia coli C. Individual plaques were isolated and purified through successive plating on E. coli C. Six of the seven phages exhibited high proficiency in infecting and propagating within E. coli C. One phage (strain Wrath) was distinctly less fecund than the others on the E. coli host.

For each bacteriophage, liquid cultures of E. coli C were inoculated and grown overnight, with shaking, at 37°C; cultures were chloroformed, filtered (0.22 µm), concentrated via tangential flow filtration (0.10 µm), and treated with DNase I (Thermo, Fisher). DNA was extracted using the UltraClean Microbial DNA Isolation Kit (Mo Bio Laboratories) to produce the 1 ng of DNA used for library preparation (Nextera XT DNA Library Preparation Kit; Illumina), following the manufacturer's instructions. Sequencing was performed on the Illumina MiSeq platform using the MiSeq reagent kit v2 producing 2 × 250 paired-end reads. Reads were trimmed using Geneious (Biomatters Ltd.) and assembled using SPAdes version 3.7.1 (2) with the careful option for k values ranging from 21 to 127. To confirm assemblies, trimmed reads were mapped to the de novo assembly via Bowtie2 (3). Genomes were annotated using RAST (4). No tRNA coding regions were detected (5).

The seven bacteriophage genomes include three distinct groups: Wrath (34.8% GC, 29,238 bp), Greed (44.6% GC, 60,042 bp), and the group including Sloth, Envy, Pride, Gluttony, and Lust (~54.5% GC, ranging in length from 41,942 to 45,206 bp). The genome sequence of Wrath was found via BLAST to most closely resemble the annotated Bacillus cereus D17 prophage (BLASTn query coverage of 79% and sequence identity of 82%), which includes the HK97 family major capsid protein. Homologous coding regions were also identified in the Bacillus phages BMPtp4 (KT372714) and BMPtpLA4 (KX190835). The presence of an integrase within the Wrath genome suggests it is able to exist as a temperate phage. This may indicate why even when grown in large volumes, consistently low coverage of the phage genome was retrieved (<100×). In contrast, high coverage was obtained for the other six phages, ranging from 120× (Greed) to 1507× (Sloth). Greed resembled one of the viruses (slur01) isolated from cattle slurry (6), relatives of coliphages Seurat (7) and CAjan (8). Sloth, Envy, Pride, Gluttony, and Lust also closely resembled a virus isolated from cattle slurry (6), slur05. Transmission electron microscopy (TEM) of the seven phages demonstrated that these viruses are tailed phages (Caudovirales), most likely Siphoviridae, as previously determined for Seurat (7), CAjan (8), and the Bacillus phages.

The bacteriophages presented here begin to describe the viral fraction of the complex communities within the human bladder.

Accession number(s).This whole-genome shotgun project has been deposited in DDBJ/ENA/GenBank under the accession numbers KX534335 (Envy), KX534336 (Gluttony), KX534337 (Greed), KX534338 (Lust), KX534341 (Pride), KX534339 (Sloth), and KX534340 (Wrath).

ACKNOWLEDGMENTS

Strains were obtained from Alan J. Wolfe (Loyola University Chicago, Maywood, IL). We thank Evann Hilt for her assistance in protocols for culturing the samples. Sequencing was performed at Loyola's Genomics Facility. We acknowledge Gina Kuffel's assistance in preparation and sequencing of these samples.

FOOTNOTES

    • Received 25 July 2016.
    • Accepted 5 October 2016.
    • Published 23 November 2016.
  • Copyright © 2016 Malki 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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Seven Bacteriophages Isolated from the Female Urinary Microbiota
Kema Malki, Emily Sible, Alexandria Cooper, Andrea Garretto, Katherine Bruder, Siobhan C. Watkins, Catherine Putonti
Genome Announcements Nov 2016, 4 (6) e01003-16; DOI: 10.1128/genomeA.01003-16

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Seven Bacteriophages Isolated from the Female Urinary Microbiota
Kema Malki, Emily Sible, Alexandria Cooper, Andrea Garretto, Katherine Bruder, Siobhan C. Watkins, Catherine Putonti
Genome Announcements Nov 2016, 4 (6) e01003-16; DOI: 10.1128/genomeA.01003-16
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