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J. Bacteriol., Apr 1997, 2534-2539, Vol 179, No. 8
Y Qi, Y Kobayashi and FM Hulett
Genes from Bacillus subtilis predicted to encode a phosphate-specific
transport (Pst) system were shown by mutation to affect high-affinity Pi
uptake but not arsenate resistance or phosphate (Pho) regulation. The
transcription start of the promoter upstream of the pstS gene was defined
by primer extension. The promoter contains structural features analogous to
the Escherichia coli pst promoter but not sequence similarity. Expression
from this promoter was induced >5,000-fold upon phosphate starvation and
regulated by the PhoP-PhoR two-component regulatory system. These data
indicate that the pst operon is involved in phosphate transport and is a
member of the Pho regulon but is not involved in Pi regulation.
Copyright © 1997, American Society for Microbiology
The pst operon of Bacillus subtilis has a phosphate-regulated promoter and is involved in phosphate transport but not in regulation of the pho regulon
Department of Biological Sciences, University of Illinois at Chicago, 60607, USA.
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