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. 1985 Nov;164(2):925–928. doi: 10.1128/jb.164.2.925-928.1985

Export defect adjacent to the processing site of staphylococcal nuclease is suppressed by a prlA mutation.

L R Liss, B L Johnson, D B Oliver
PMCID: PMC214342  PMID: 3902802

Abstract

Plasmids have been constructed in which the Escherichia coli alkaline phosphatase promoter and signal sequence have been fused to the staphylococcal nuclease gene to promote the high-level expression and secretion of this gene product in E. coli. We determined that the first amino acid residue after the signal sequence can determine whether this protein was processed and exported to the periplasmic space. Fractionation and protease accessibility studies were used to show that the export-defective, nuclease precursor is internal to the cytoplasmic membrane barrier of the cell. Furthermore, this export defect was suppressed in a strain containing a prlA mutation. These findings are novel in that this region of the polypeptide chain has been implicated in processing but not export and that prlA mutations have not been previously known to suppress such defects.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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