Bacillus Licheniformis Strain Engineering for Higher Protein Yield
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing Bacillus licheniformis strains have limitations in protein production capabilities, necessitating the development of modified strains with enhanced protein expression and secretion for industrial applications.
Innovation Solution
Genetic modifications, including deletion or disruption of specific endogenous genes such as yvzC, Bli03644, AbrB1, and abh (AbrB2), combined with the introduction of a modified rghR2 gene encoding a RghR2 protein with a 90% sequence identity, enhance protein production in Bacillus licheniformis cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If genetic modifications are made to enhance protein production, then productivity increases, but device complexity increases
Solution Approach 1:
The patent extracts and removes specific endogenous genes (yvzC, Bli03644, AbrB1, abh) that limit protein production capabilities. By deleting these restrictive genetic elements, the system achieves enhanced protein yield without adding complex foreign genetic circuits, thus improving productivity while maintaining relatively simple genetic architecture.
Solution Approach 2:
The patent modifies the rghR2 gene to encode a variant protein with 90% sequence identity to the wild-type, representing a controlled parameter change in genetic sequence. This subtle modification optimizes transcriptional regulation for higher protein production while avoiding the complexity of complete gene replacement or synthetic circuit design.
2Productivity
If multiple endogenous genes are deleted to enhance protein production, then productivity increases, but manufacturing precision decreases
Solution Approach 1:
The patent applies segmentation by targeting and deleting specific individual endogenous genes (yvzC, Bli03644, AbrB1, abh) rather than performing random mutagenesis or large-scale genomic restructuring. This gene-by-gene approach allows precise control over which genetic elements are removed, enabling systematic optimization of protein production while maintaining accuracy in strain development.
Data Source
AI summary
The present disclosure is generally related to compositions and methods for obtaining Bacillus licheniformis cells/strains having increased protein production capabilities. Certain embodiments of the disclosure are related to genetically modified Bacillus licheniformis cells/strains derived from parental B. licheniformis cells/strains comprising a variant rghR2 gene.