Abstract
We have previously made a set of DNA constructs by fusing the mature part of Bacillus licheniformis alpha-amylase with the signal sequence of B. amyloliquefaciens alpha-amylase at various distances from the signal sequence cleavage site. We observed that the level of alpha-amylase production in B. subtilis depended strongly on the distance of the junction from the signal sequence cleavage site, with quite a sharp optimum distance. To test whether the effect is limited to the pair of alpha-amylase signal sequence and mature protein, we analysed the protein production in a set of constructs in which an Escherichia coli beta-lactamase was similarly joined at different distances from the alpha-amylase signal sequence. Also in this case the distance seemed to be an important factor in affecting the level of production in B. subtilis. The observed effect might depend on the modulation of pre-protein folding, which in turn could affect the secretion level.
MeSH Terms
Amino Acid Sequence
Bacillus/genetics
Bacillus subtilis/genetics,metabolism
Bacterial Proteins/biosynthesis,genetics
Escherichia coli/genetics
Gene Expression Regulation, Bacterial
Genes, Bacterial
Molecular Sequence Data
Protein Sorting Signals/biosynthesis,genetics
Recombinant Fusion Proteins/biosynthesis
alpha-Amylases/biosynthesis,genetics
beta-Lactamases/biosynthesis,genetics
Chemicals
Bacterial Proteins
Protein Sorting Signals
Recombinant Fusion Proteins
alpha-Amylases
beta-Lactamases
Authors & Affiliations
2 authors, click to expand affiliations / ORCID
Hemilä H
Institute of Biotechnology, Helsinki, Finland.
Sibakov M
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