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Comparison of 61 Sequenced Escherichia coli Genomes

Open access
Lukjancenko, Oksana, Wassenaar, Trudy M., Ussery, David W.·2010·Microbial Ecology

Abstract

Escherichia coli is an important component of the biosphere and is an ideal model for studies of processes involved in bacterial genome evolution. Sixty-one publically available E. coli and Shigella spp. sequenced genomes are compared, using basic methods to produce phylogenetic and proteomics trees, and to identify the pan- and core genomes of this set of sequenced strains. A hierarchical clustering of variable genes allowed clear separation of the strains into clusters, including known pathotypes; clinically relevant serotypes can also be resolved in this way. In contrast, when in silico MLST was performed, many of the various strains appear jumbled and less well resolved. The predicted pan-genome comprises 15,741 gene families, and only 993 (6%) of the families are represented in every genome, comprising the core genome. The variable or 'accessory' genes thus make up more than 90% of the pan-genome and about 80% of a typical genome; some of these variable genes tend to be co-localized on genomic islands. The diversity within the species E. coli, and the overlap in gene content between this and related species, suggests a continuum rather than sharp species borders in this group of Enterobacteriaceae.

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Metadata

Authors
Lukjancenko, O., Wassenaar, T. M., & Ussery, D. W.
Venue
Microbial Ecology
Published
2010-07-11
Volume
60
Issue
4
Pages
708-720
ISSN
  • 0095-3628 (ISSN-L)
  • 1432-184X
OpenAlex
W2064452752
Cited by
532
References
42
FWCI
22.43
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: Comparison of 61 Sequenced Escherichia coli Genomes. https://app.cochat.ai/papers/10.1007/s00248-010-9717-3
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Lukjancenko, O., Wassenaar, T. M., & Ussery, D. W. (2010). Comparison of 61 Sequenced Escherichia coli Genomes. Microbial Ecology. https://doi.org/10.1007/s00248-010-9717-3

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