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Genome Sequences

Draft Genome Sequence of an Escherichia coli Sequence Type 155 Strain Isolated from Sewage in Kerala, India

Amrita Salim, Pradeesh Babu, Keerthi Mohan, Manju Moorthy, Devika Raj, Swathy Kallampillil Thirumeni, Sagarbabu Suresh, Ajith Madhavan, Bipin G. Nair, Sujay Chattopadhyay, Sanjay Pal
David Rasko, Editor
Amrita Salim
aSchool of Biotechnology, Amrita Vishwa Vidyapeetham, Kollam, Kerala, India
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  • ORCID record for Amrita Salim
Pradeesh Babu
aSchool of Biotechnology, Amrita Vishwa Vidyapeetham, Kollam, Kerala, India
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Keerthi Mohan
aSchool of Biotechnology, Amrita Vishwa Vidyapeetham, Kollam, Kerala, India
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Manju Moorthy
aSchool of Biotechnology, Amrita Vishwa Vidyapeetham, Kollam, Kerala, India
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Devika Raj
aSchool of Biotechnology, Amrita Vishwa Vidyapeetham, Kollam, Kerala, India
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Swathy Kallampillil Thirumeni
aSchool of Biotechnology, Amrita Vishwa Vidyapeetham, Kollam, Kerala, India
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Sagarbabu Suresh
aSchool of Biotechnology, Amrita Vishwa Vidyapeetham, Kollam, Kerala, India
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Ajith Madhavan
aSchool of Biotechnology, Amrita Vishwa Vidyapeetham, Kollam, Kerala, India
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Bipin G. Nair
aSchool of Biotechnology, Amrita Vishwa Vidyapeetham, Kollam, Kerala, India
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Sujay Chattopadhyay
aSchool of Biotechnology, Amrita Vishwa Vidyapeetham, Kollam, Kerala, India
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Sanjay Pal
aSchool of Biotechnology, Amrita Vishwa Vidyapeetham, Kollam, Kerala, India
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David Rasko
University of Maryland School of Medicine
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DOI: 10.1128/MRA.01707-18
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ABSTRACT

We report the draft genome sequence of Escherichia coli ASBT-1, a representative of E. coli sequence type 155 (ST155), obtained from India. Considering the known wide variety of pathogenic and antibiotic resistance potentials, this strain should be of great interest for detailed comparative genomic analysis.

ANNOUNCEMENT

Escherichia coli sequence type 155 (ST155) represents important strains responsible for zoonotic transmission of extended-spectrum β-lactamase genes to humans (1–8). We announce an assembled draft genome of an E. coli ST155 strain obtained from wastewater in Kerala, India, and explore the diversity of different antibiotic resistance profiles in the region.

The organism was isolated from sewage in eosin-methylene blue agar, biochemically characterized as E. coli, and confirmed by 16S rRNA gene ribotyping (9). Genomic DNA was extracted using the phenol-chloroform method (10). The paired-end sequencing library was prepared using the TruSeq Nano DNA library prep kit. The Illumina HiSeq platform was used for sequencing the paired-end library, with a read length of 2 × 150 bp and coverage of 850×. Both quantity and quality checks of the amplified library were performed in a Bioanalyzer 2100 (Agilent Technologies) using a high-sensitivity DNA chip per the manufacturer’s instructions. The reads generated were filtered using Trimmomatic (v0.30) with a quality value (QV) of >20, and adapters were also removed. Subsequently, the high-quality (4.15 Gb) data were used for assembly. De novo assembly of paired-end reads was performed using Velvet v1.2.10. The total number of reads was 28,029,838. The details of the assembled genome are listed in Table 1. An NCBI genome annotation tool was used to annotate the genome and detected a total of 4,393 protein-coding genes with an average size of 945 bp. This genome was found to harbor 75 tRNA and 8 rRNA genes, as predicted by tRNAscan-SE v2.0 (11) and DFAST v1.0.1 (12), respectively. A total of 5 intact prophage regions were identified using the PHAST tool (13) (last accessed date, 18 September 2018). Two CRISPR-Cas sequences were detected, one by CRISPRFinder (14) (last accessed date, 18 September 2018) and one by Prokka v1.12 (15), respectively. Altogether, as an Indian representative of an E. coli ST155 clone, ASBT-1 warrants additional in-depth research on its genomic features, pathotype, and antibiotic resistance profile.

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TABLE 1

Summary of the genome sequence of strain ASBT-1

Data availability.This whole-genome shotgun project has been deposited at DDBJ/ENA/GenBank under the accession number RWJY00000000 (BioProject number PRJNA509104). The version described in this paper is RWJY01000000, with SRA accession number SRR8480428.

ACKNOWLEDGMENTS

This work was supported by the Reinvent the Toilet Challenge (RTTC) award (2014) funded by the Bill & Melinda Gates Foundation–BIRAC (Government of India) (grant number BIRAC/GCI/0067/02/13-RTTC OPP1107707) and School of Biotechnology, Amrita Vishwa Vidyapeetham, Kerala, India. We acknowledge the University Grant Commission (UGC) and Council of Industrial and Scientific Research (CSIR), New Delhi, India, for providing fellowships for the authors.

We declare no conflicts of interest.

FOOTNOTES

    • Received 18 January 2019.
    • Accepted 4 June 2019.
    • Published 3 July 2019.
  • Copyright © 2019 Salim 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 an Escherichia coli Sequence Type 155 Strain Isolated from Sewage in Kerala, India
Amrita Salim, Pradeesh Babu, Keerthi Mohan, Manju Moorthy, Devika Raj, Swathy Kallampillil Thirumeni, Sagarbabu Suresh, Ajith Madhavan, Bipin G. Nair, Sujay Chattopadhyay, Sanjay Pal
Microbiology Resource Announcements Jul 2019, 8 (27) e01707-18; DOI: 10.1128/MRA.01707-18

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Draft Genome Sequence of an Escherichia coli Sequence Type 155 Strain Isolated from Sewage in Kerala, India
Amrita Salim, Pradeesh Babu, Keerthi Mohan, Manju Moorthy, Devika Raj, Swathy Kallampillil Thirumeni, Sagarbabu Suresh, Ajith Madhavan, Bipin G. Nair, Sujay Chattopadhyay, Sanjay Pal
Microbiology Resource Announcements Jul 2019, 8 (27) e01707-18; DOI: 10.1128/MRA.01707-18
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