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Abstract Bacillus subtilis is a valuable industrial production platform for proteins, a bacterial model for cellular differentiation and its endospores have been proposed as a vehicle for vaccine delivery. As such B. subtilis is a major synthetic biology chassis but, unlike Escherichia coli , lacks a standardized toolbox for genetic manipulation. EcoFlex is a versatile modular DNA assembly toolkit for E. coli synthetic biology based on Golden Gate cloning. Here we introduce BacilloFlex, an extension of the EcoFlex assembly standard to B. subtilis . Transcription units flanked by sequences homologous to loci in the B. subtilis genome were rapidly assembled by the EcoFlex standard and subsequently chromosomally integrated. At present, BacilloFlex includes a range of multi-functional B. subtilis specific parts with applications including metabolic engineering, biosensors and spore surface display. We hope this work will form the foundation of a widely adopted cloning standard for B. subtilis facilitating collaboration and the sharing of parts.
Wicke et al. (Wed,) studied this question.
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