Escherichia coli contains a set of genes homologous to those involved in protein secretion, DNA uptake and the assembly of type-4 fimbriae in other bacteria.

Abstract excerpt

A specialised system involved in a diverse array of functions, including the biogenesis of fimbriae, protein secretion and DNA uptake, has recently been found to be widespread in the eubacteria. These systems have in common several sets of related genes, including those encoding proteins containing leader sequences homologous to that of the type-4 fimbrial subunit (prepilin), a prepilin-type leader peptidase, a...

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