1887

Abstract

The kinetics of levansucrase secretion were examined in a strain of which overproduces the enzyme ( ). Pulse-labelling experiments indicated that the second step of the levansucrase secretion process has the properties of a membrane active-transport system. This event appears to be directly linked to the influx of iron into the bacteria. The response of to the inducer of levansucrase synthesis was modulated by ferrichelators and the extent of the response varied with the nature of the ferrichelator. Ferridihydroxybenzoate markedly shortened the induction lag period. It is inferred from these data that iron occurs as a cofactor for components of the membrane sites of synthesis/secretion of levansucrase.

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1988-05-01
2021-10-27
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