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A new maltose-inducible high-performance heterologous expression system in Bacillus subtilis.
Biotechnology Letters 2017 August
OBJECTIVES: To improve heterologous proteins production, we constructed a maltose-inducible expression system in Bacillus subtilis.
RESULTS: An expression system based on the promoter for maltose utilization constructed in B. subtilis. Successively, to improve the performance of the P malA -derived system, mutagenesis was employed by gradually shortening the length of P malA promoter and altering the spacing between the predicted MalR binding site and the -35 region. Furthermore, deletion of the maltose utilization genes (malL and yvdK) improved the P malA promoter activity. Finally, using this efficient maltose-inducible expression system, we enhanced the production of luciferase and D-aminoacylase, compared with the P hpaII system.
CONCLUSIONS: A maltose-inducible expression system was constructed and evaluated. It could be used for high level expression of heterologous proteins production.
RESULTS: An expression system based on the promoter for maltose utilization constructed in B. subtilis. Successively, to improve the performance of the P malA -derived system, mutagenesis was employed by gradually shortening the length of P malA promoter and altering the spacing between the predicted MalR binding site and the -35 region. Furthermore, deletion of the maltose utilization genes (malL and yvdK) improved the P malA promoter activity. Finally, using this efficient maltose-inducible expression system, we enhanced the production of luciferase and D-aminoacylase, compared with the P hpaII system.
CONCLUSIONS: A maltose-inducible expression system was constructed and evaluated. It could be used for high level expression of heterologous proteins production.
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