1887

Abstract

Summary

-amylase has a signal peptide typical for proteins exported by Gram-positive bacteria. There is only one signal peptidase processing site when the protein is exported from the original host, but when it is exported by , two alternative sites are utilized. Site-directed mutagenesis was used to study the processing in Processing sites for -amylases carrying mutations in their signal peptide were determined. Processing of the signal peptide was remarkably tolerant to mutations, because switching between the alternative sites was possible. The length and the sequence of the region between the hydrophobic correspe and the cleavage site was crucial for determining the choice of the processing site. Some mutations more distal to the cleavage site also affected the site preference.

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1995-03-01
2021-10-25
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