Antonie van Leeuwenhoek

, Volume 95, Issue 1, pp 101–109 | Cite as

Expression of the MtsA lipoprotein of Streptococcus agalactiae A909 is regulated by manganese and iron

  • Beverley A. Bray
  • Iain C. Sutcliffe
  • Dean J. Harrington
Short Communication


Metal ion acquisition and homeostasis are essential for bacterial survival, growth and physiology. A family of metal ion, ABC-type import systems have been identified in Gram-positive bacteria, in which the solute-binding proteins are predicted to be membrane-anchored lipoproteins. The prediction that the MtsA protein of Streptococcus agalactiae A909 is a lipoprotein was confirmed. The expression of MtsA was co-ordinately regulated by the presence of both manganese and ferrous ions suggesting that MtsA may be involved in the uptake of both these ions. MtsA was shown to be expressed at levels of ferrous ions known to be present in amniotic fluid, a growth medium for S. agalactiae during neonatal infection.


ABC transport Group B Streptococcus Iron Lipoprotein Manganese 



We thank Jamie Leigh (Institute for Animal Health, Berkshire, UK) for the anti-MtuA antiserum and Thelma Howley (University of Bradford) for preliminary experiments. Globomycin was generously supplied by Masatoshi Inukai (Sankyo Co. Ltd., Tokyo, Japan).


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Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • Beverley A. Bray
    • 1
  • Iain C. Sutcliffe
    • 2
  • Dean J. Harrington
    • 1
  1. 1.Division of Biomedical SciencesUniversity of BradfordWest YorkshireUK
  2. 2.Northumbria UniversityNewcastle upon TyneUK

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