IS-Mediated Gene Insertion in Deinococcus Bacteria
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Solution Overview
Problem
Current methods for genetically modifying Deinococcus bacteria are limited in their ability to efficiently integrate nucleic acids into their genomes, particularly for multicopy gene insertion and chromosomal engineering, which hinders the expression of desired genes and adaptation to environmental stresses.
Innovation Solution
The use of Insertion Sequence (IS)-mediated methods, including homologous recombination, intron-mediated insertion, and IS-mediated transposition, to introduce and amplify genes of interest in Deinococcus bacteria, leveraging the high occurrence of IS elements in these bacteria to achieve targeted and multicopy gene integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional gene insertion methods are used in Deinococcus bacteria, then gene integration can be achieved, but the efficiency and copy number of gene insertion are limited
Solution Approach 1:
The patent applies preliminary action by first introducing an insertion sequence (IS) element into the Deinococcus genome before attempting gene insertion. The IS element serves as a pre-prepared target site that facilitates subsequent high-efficiency gene integration. This preliminary setup enables multiple copies of the gene to be inserted at the same locus, thereby resolving the contradiction between insertion efficiency and copy number.
Solution Approach 2:
The insertion sequence (IS) element acts as an intermediary between the gene of interest and the bacterial genome. The IS element contains specific sequences that mediate the integration process, allowing efficient insertion of multiple gene copies. This intermediary mechanism enables high-copy number insertion that would not be achievable through traditional direct integration methods.
2Adaptability or versatility
If more genes are inserted into the genome, then gene expression and adaptability improve, but the complexity of genetic engineering operations increases
Solution Approach 1:
The insertion sequence (IS) element serves multiple functions simultaneously: it acts as a target site for gene insertion, provides a mechanism for multiple copy integration, and facilitates homologous recombination. This multi-functionality allows complex genetic engineering outcomes (high adaptability through multiple gene copies) to be achieved through a relatively simple unified mechanism, thereby reducing operational complexity while enhancing bacterial adaptability.
3Manufacturing precision
If IS-mediated insertion methods are used, then targeted gene integration is achieved, but the precision of insertion location control requires improvement
Solution Approach 1:
The patent employs parameter changes by modifying the homology region parameters within the IS element. By adjusting the length and sequence composition of homology regions, the system optimizes both the precision of insertion location control and the accuracy of targeting. This parameter optimization enables the IS-mediated system to achieve high-precision insertion at predetermined genomic locations.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables efficient and targeted integration of genes, increasing gene expression and allowing for chromosomal rearrangements, thereby enhancing the bacteria's adaptability and performance in biotechnological applications such as bioremediation and biofuel production.
Implementation Method 1
introducing said nucleic acid into said genome by homologous recombination with an IS present in the genome
Implementation Method 2
by IS-mediated transposition
Implementation Method 3
by intron-mediated insertion into an IS
Data Source
AI summary
The present invention relates to methods and compositions for chromosome integration of nucleic acids into Deinococcus bacteria. The invention more particularly relates to IS-mediated multicopy gene insertion or chromosome engineering in Deinococcus bacteria, the resulting bacteria, and the uses thereof.