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  • Title: Characterization of the secretion efficiency of a plant signal peptide in Bacillus subtilis.
    Author: Ribbe J, Nagarajan V.
    Journal: Mol Gen Genet; 1992 Nov; 235(2-3):333-9. PubMed ID: 1465106.
    Abstract:
    The ability of the Bacillus subtilis secretion machinery to interact with a heterologous signal peptide was studied using a plant (wheat alpha-amylase) signal peptide. The plant signal peptide was capable of mediating secretion of Escherichia coli alkaline phosphatase and B. amyloliquefaciens levansucrase from B. subtilis. This secretion was dependent on the plant signal peptide, as deletion of five amino acids from the hydrophobic core resulted in a block of secretion. Attempts to improve the efficiency of the plant signal peptide in B. subtilis were made by increasing the length of the hydrophobic core from 10 to 16 residues by insertion of 2, 4, 5 or 6 amino acids. None of the alterations improved the secretion efficiency relative to the wild-type plant signal peptide.
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