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Evidence for niche adaptation in the genome of the bovine pathogen Streptococcus uberis

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Date
28/01/2009
Author
Ward, Philip N.
Holden, Matthew T. G.
Leigh, James A.
Lennard, Nicola
Bignell, Alexandra
Barron, Andy
Clark, Louise
Quail, Michael A.
Woodward, John
Barrell, Bart G.
Egan, Sharon A.
Field, Terence R.
Maskell, Duncan
Kehoe, Michael
Dowson, Christopher G.
Chanter, Neil
Whatmore, Adrian M.
Bentley, Stephen D.
Parkhill, Julian
Keywords
Group-a streptococcus
Gram-positive bacteria
Group-b streptococcus
Complete nucleotide-sequence
Hyaluronic-acid capsule
Clinical mastitis
Inorganic polyphosphate
Plasminogen-activator
Repetitive structure
Maximum-likelihood
QH426 Genetics
QL Zoology
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Abstract
Background: Streptococcus uberis, a Gram positive bacterial pathogen responsible for a significant proportion of bovine mastitis in commercial dairy herds, colonises multiple body sites of the cow including the gut, genital tract and mammary gland. Comparative analysis of the complete genome sequence of S. uberis strain 0140J was undertaken to help elucidate the biology of this effective bovine pathogen. Results: The genome revealed 1,825 predicted coding sequences (CDSs) of which 62 were identified as pseudogenes or gene fragments. Comparisons with related pyogenic streptococci identified a conserved core (40%) of orthologous CDSs. Intriguingly, S. uberis 0140J displayed a lower number of mobile genetic elements when compared with other pyogenic streptococci, however bacteriophage-derived islands and a putative genomic island were identified. Comparative genomics analysis revealed most similarity to the genomes of Streptococcus agalactiae and Streptococcus equi subsp. zooepidemicus. In contrast, streptococcal orthologs were not identified for 11% of the CDSs, indicating either unique retention of ancestral sequence, or acquisition of sequence from alternative sources. Functions including transport, catabolism, regulation and CDSs encoding cell envelope proteins were over-represented in this unique gene set; a limited array of putative virulence CDSs were identified. Conclusion: S. uberis utilises nutritional flexibility derived from a diversity of metabolic options to successfully occupy a discrete ecological niche. The features observed in S. uberis are strongly suggestive of an opportunistic pathogen adapted to challenging and changing environmental parameters.
Citation
Ward , P N , Holden , M T G , Leigh , J A , Lennard , N , Bignell , A , Barron , A , Clark , L , Quail , M A , Woodward , J , Barrell , B G , Egan , S A , Field , T R , Maskell , D , Kehoe , M , Dowson , C G , Chanter , N , Whatmore , A M , Bentley , S D & Parkhill , J 2009 , ' Evidence for niche adaptation in the genome of the bovine pathogen Streptococcus uberis ' , BMC Genomics , vol. 10 , 54 . https://doi.org/10.1186/1471-2164-10-54
Publication
BMC Genomics
Status
Peer reviewed
DOI
https://doi.org/10.1186/1471-2164-10-54
ISSN
1471-2164
Type
Journal item
Rights
© 2009 Ward et al; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Description
This work was supported by the Wellcome Trust.
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/4640

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