期刊
JOURNAL OF BIOSCIENCE AND BIOENGINEERING
卷 120, 期 4, 页码 470-475出版社
SOC BIOSCIENCE BIOENGINEERING JAPAN
DOI: 10.1016/j.jbiosc.2015.02.008
关键词
Bacillus subtilis; Double promoter; Synergism; sigma(A)-dependent promoter; sigma(B)-dependent promoter; Recombinant protein expression; Green fluorescent protein
资金
- Thailand Research Fund [BRG5080023]
- Mahidol University
- Commission on Higher Education of Thailand
Strong promoter is an essential factor for production of recombinant protein in various expression systems including Bacillus subtilis. In this study, we described a strategy to improve the expression efficiency using synthetic double promoter. Assembly of the conserved elements from sigma(B)- and sigma(A)-dependent promoters constitutively improved the yield of recombinant protein approximately 2-3-fold in both exponential and stationary growth phase. The synergistic effect in the double promoter was observed only when sigma(B)- promoter was located upstream to sigma(A)-promoter but independent to its orientation. A conserved element in either -10 or -35 box of sigma(B)-promoter is sufficient to promote the synergism. Hence, this simple strategy of promoter engineering could be an effective way to generate a pool of strong constitutive promoters applicable for heterologous protein expression in B. subtilis in the future. (C) 2015, The Society for Biotechnology, Japan. All rights reserved.
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