Recombinant Bacillus Host Cells for Cellulase-Free Protease Production
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for producing detergent-additive proteins, such as proteases, often result in the unwanted production of undesirable enzymes like cellulases, which can be problematic in applications like laundry detergents.
Innovation Solution
Recombinant Bacillus sp. host cells with an inactivated bglC gene are used to produce secreted detergent-additive proteins, specifically proteases like subtilisin, which are free from cellulase activity by introducing recombinant nucleic acids that either delete or inactivate the bglC gene, ensuring minimal cellulase production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If recombinant Bacillus sp. cells are used to produce detergent-additive proteins, then productivity is improved, but undesirable cellulase activity is generated
Solution Approach 1:
The bglC gene, which encodes cellulase activity, is specifically removed or inactivated from the Bacillus sp. genome through targeted genetic modification. This extraction of the harmful genetic element allows the cell to maintain productive protein expression while eliminating the unwanted cellulase activity that would otherwise be generated during cultivation
Solution Approach 2:
The genetic parameter of the bglC gene is altered through inactivation (deletion, insertion, or mutation) to change the cell's enzymatic profile. This parameter change transforms the cell from producing both detergent-additive protein and cellulase to producing only the desired detergent-additive protein, thereby resolving the contradiction between productivity and harmful byproduct generation
2Manufacturing precision
If bglC gene is inactivated to eliminate cellulase activity, then purity of detergent composition is improved, but manufacturing complexity increases
Solution Approach 1:
The bglC gene is inactivated in advance during host cell preparation, before the actual detergent-additive protein production process. This preliminary genetic modification ensures that cellulase activity is eliminated at the source, preventing contamination of the final product and avoiding the need for complex downstream purification steps to remove cellulase
Data Source
AI summary
The present invention provides recombinant bacterial cells for producing a detergent-additive protein. In some embodiments, the cells are of the genus Bacillus. In additional embodiments, the cells comprise a genome comprising an inactivated bglC gene, as well as a recombinant nucleic acid for production of at least one secreted detergent-additive protein. In some preferred embodiments, the secreted detergent-additive protein is a protease. The present invention also provides methods of using the bacterial cells to produce at least one detergent-additive protein, as well as cellulase-free compositions containing at least one detergent-additive protein.