J. Biol. Chem., Vol. 261, Issue 24, 10970-10975, 08, 1986
Structural requirement at the cleavage site for efficient processing of the lipoprotein secretory precursor of Escherichia coli
S Inouye, G Duffaud and M Inouye
A phenotypically silent mutation in the signal peptide of the Escherichia
coli outer membrane prolipoprotein was combined with other mutations in the
mature lipoprotein structure. Under conditions where the individual
mutations permit normal lipoprotein secretion, the prolipoprotein with both
mutations was unable to be normally modified or processed. These results
demonstrate that a given signal peptide is fully functional only if it is
structurally compatible with the protein to be secreted. This structural
compatibility between the signal peptide and the secretory protein is
considered to be dependent on the secondary structure formed at or near the
signal peptide cleavage site.