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 Previous Article

Journal of Bacteriology, September 1999, p. 5539-5541, Vol. 181, No. 17
0021-9193/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

A New Class of Cobalamin Transport Mutants (btuF) Provides Genetic Evidence for a Periplasmic Binding Protein in Salmonella typhimurium

Michael Van Bibber,1 Clive Bradbeer,2 Nica Clark,1 and John R. Roth1,*

Department of Biology, University of Utah, Salt Lake City, Utah 84112,1 and Department of Biochemistry and Molecular Genetics, University of Virginia Health Sciences Center, Charlottesville, Virginia 229082

Received 3 May 1999/Accepted 18 June 1999

No periplasmic binding protein has been demonstrated for the ATP-binding cassette (ABC)-type cobalamin transporter BtuCD. New mutations (btuF) are described that affect inner-membrane transport. The BtuF protein has a signal sequence and resembles the periplasmic binding proteins of several other ABC transporters.

* Corresponding author. Mailing address: Department of Biology, University of Utah, Salt Lake City, UT 84112. Phone: (801) 581-3412. Fax: (801) 585-6207. E-mail: Roth{at}Bioscience.utah.edu.

Journal of Bacteriology, September 1999, p. 5539-5541, Vol. 181, No. 17
0021-9193/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.


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