Synthetic Retrotransposon Gene Codon Optimization

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Solution Overview

Problem

Current transposon and retrotransposon technologies have limitations in gene therapy applications due to low expression levels and inefficient transposition, which hampers their utility in correcting genetic disorders and manipulating mammalian genomes effectively.

Innovation Solution

Development of synthetic transposon and retrotransposon genes, specifically optimized ORF1 and ORF2 genes, that utilize human-associated codons for enhanced expression and efficiency, incorporating unique restriction sites for improved subcloning and vector constructs for increased retrotransposition frequencies.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If native retrotransposon elements are used for gene therapy, then the system maintains natural genomic compatibility, but the expression levels and retrotransposition efficiency remain low

Engineering Contradiction:
Improveretrotransposition efficiencyVSAvoidgene structure optimization
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The patent applies parameter changes by optimizing codon usage to match human-associated preferences, modifying the nucleotide sequence while preserving the amino acid sequence. This recoding strategy increases expression levels and retrotransposition efficiency without altering the functional protein products, directly resolving the contradiction between maintaining natural compatibility and improving productivity.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The patent creates synthetic copies of retrotransposon genes with optimized sequences. By synthesizing new gene versions with improved codon usage and incorporating unique restriction sites, the invention produces enhanced copies that maintain functional compatibility while achieving superior expression and retrotransposition efficiency compared to native elements.

Inventive Principle:
Principle #26Copying

2Quantity of substance

If synthetic genes with optimized codons are used, then expression levels increase, but the manufacturing and design complexity increases

Engineering Contradiction:
Improvegene expression levelVSAvoidgene synthesis complexity
Core Design Contradiction:
Quantity of substanceVSEase of manufacture

Solution Approach 1:

The patent implements self-service by incorporating unique restriction sites at predetermined positions within the synthetic genes. These built-in molecular features enable automated subcloning and vector construction without requiring complex manual manipulation, thereby reducing manufacturing complexity despite the advanced gene design. The restriction sites allow standard molecular biology techniques to efficiently assemble the optimized genes into functional vectors.

Inventive Principle:
Principle #25Self-service

3Ease of operation

If unique restriction sites are incorporated for subcloning, then vector construction efficiency improves, but the gene sequence complexity increases

Engineering Contradiction:
Improvesubcloning efficiencyVSAvoidgene sequence structure
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by pre-incorporating unique restriction sites during the gene synthesis stage. This advance preparation enables straightforward subcloning and vector construction in subsequent steps, as the restriction sites are already positioned and ready for standard enzymatic digestion and ligation procedures. The preliminary inclusion of these features simplifies downstream operations despite adding to the initial sequence design complexity.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentUS9267932B2Synthetic mammalian retrotransposon gene
Publication Date: 2016.02.23 JOHNS HOPKINS UNIVERSITY
  • US9267932B2 patent drawing
  • US9267932B2 patent drawing
  • US9267932B2 patent drawing

AI summary

The invention relates to synthetic transposon and retrotransposon genes that exhibit higher levels of expression relative to natural transposon and retrotransposon genes. The invention further relates to transposons and retrotransposons comprising such synthetic genes.