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.
journal_name
BMC Genomicsjournal_title
BMC genomicsauthors
Ward PN,Holden MT,Leigh JA,Lennard N,Bignell A,Barron A,Clark L,Quail MA,Woodward J,Barrell BG,Egan SA,Field TR,Maskell D,Kehoe M,Dowson CG,Chanter N,Whatmore AM,Bentley SD,Parkhill Jdoi
10.1186/1471-2164-10-54subject
Has Abstractpub_date
2009-01-28 00:00:00pages
54issn
1471-2164pii
1471-2164-10-54journal_volume
10pub_type
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