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Applied and Environmental Microbiology, March 2000, p. 1243-1248, Vol. 66, No. 3
0099-2240/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.

Staphylococcal Surface Display of Metal-Binding Polyhistidyl Peptides

Patrik Samuelson,1 Henrik Wernérus,1 Malin Svedberg,2 and Stefan Ståhl1,*

Department of Biotechnology1 and Department of Analytical Chemistry,2 Kungliga Tekniska Högskolan, S-100 44 Stockholm, Sweden

Received 12 October 1999/Accepted 20 December 1999

Recombinant Staphylococcus xylosus and Staphylococcus carnosus strains were generated with surface-exposed chimeric proteins containing polyhistidyl peptides designed for binding to divalent metal ions. Surface accessibility of the chimeric surface proteins was demonstrated and the chimeric surface proteins were found to be functional in terms of metal binding, since the recombinant staphylococcal cells were shown to have gained Ni2+- and Cd2+-binding capacity, suggesting that such bacteria could find use in bioremediation of heavy metals. This is, to our knowledge, the first time that recombinant, surface-exposed metal-binding peptides have been expressed on gram-positive bacteria. Potential environmental or biosensor applications for such recombinant staphylococci as biosorbents are discussed.


* Corresponding author. Mailing address: Department of Biotechnology, Kungliga Tekniska Högskolan, S-100 44 Stockholm, Sweden. Phone: 46 8 790 6497. Fax: 46 8 245452. E-mail: stefans{at}biochem.kth.se.


Applied and Environmental Microbiology, March 2000, p. 1243-1248, Vol. 66, No. 3
0099-2240/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.



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