Insights from the Whole Genome Sequence of Escherichia coli RS218 in Identifying Potential Virulence Traits Common to E. coli Causing Neonatal Meningitis and Other Extra-intestinal Diseases
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Abstract
Escherichia coli RS218 is the prototypic strain of neonatal meningitis causing E. coli (NMEC) that has been used in many studies relevant to NMEC pathogenesis. In the present study, the whole genome of E. coli RS218 was sequenced and compared with the genomes of eight other extraintestinal pathogenic E. coli (ExPEC) as well as with the laboratory strain of E. coli K-12. Analysis of E. coli RS218 genome revealed that it consists of a circular chromosome of 5.087 Mb in size and a 114-Kbp plasmid with an average G+C content of 50.6%. The chromosome contains 4,658 coding sequences, 88 transfer RNAs, 22 ribosomal RNAs, one clustered regularly interspaced short palindromic repeats array, and five noncoding RNAs. Escherichia coli RS218 genome demonstrated 98% nucleotide similarity to cystitis causing E. coli strain UTI89. Comparative genomic analysis identified a total of 51 genomic islands (GIs) in E. coli RS218 which were not present in the E. coli K-12 genome. Of these GIs, 16 were common to all NMEC strains studied whereas two GIs were common to all ExPEC. The GIs common to all NMEC encode for several sugar uptake pathways, arginine/ornithine metabolism, iron uptake systems, and putative adhesins and invasins, which may contribute to NMEC pathogenesis. This study also identified NMEC-specific traits that might play a role in initial colonization of mucosal epithelia and penetration of the intestinal and blood brain barriers by NMEC. Overall, these data will facilitate a better understanding of the genetic bases of virulence and adaptation mechanisms of ExPEC.
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How to Cite
KARIYAWASAM, Subhashinie et al.
Insights from the Whole Genome Sequence of Escherichia coli RS218 in Identifying Potential Virulence Traits Common to E. coli Causing Neonatal Meningitis and Other Extra-intestinal Diseases.
Medical Research Archives, [S.l.], v. 4, n. 6, oct. 2016.
ISSN 2375-1924.
Available at: <https://esmed.org/MRA/mra/article/view/655>. Date accessed: 21 dec. 2024.
Keywords
Comparative genomics, Escherichia coli, ExPEC, Neonatal meningitis, Whole genome sequencing, Virulence traits
Section
Research Articles
The Medical Research Archives grants authors the right to publish and reproduce the unrevised contribution in whole or in part at any time and in any form for any scholarly non-commercial purpose with the condition that all publications of the contribution include a full citation to the journal as published by the Medical Research Archives.
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