Coordinate derepression of alkaline phosphatase, and binding protein dependent transport systems for phosphate and sn-glycerol-3-phosphate by phosphate starvation in Erwinia carotovora subsp. carotovora

In Erwinia carotovora subsp. carotovora EC14 grown under conditions of phosphate starvation, alkaline phosphatase, and binding protein dependent transport systems for inorganic phosphate and sn-glycerol-3-phosphate were simultaneously derepressed. Analysis of periplasmic protein profiles from phosphate-starved cells revealed four starvation-inducible proteins. Three of these proteins corresponded to alkaline phosphatase, a binding protein for phosphate, and a binding protein for sn-glycerol-3-phosphate, respectively. The coordinate derepression of these proteins demonstrates the existence of a phosphate regulon similar to that found in other members of the family Enterobacteriaceae.