
bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2025, Volume and Issue: unknown
Published: April 15, 2025
Abstract The capacity to engineer organisms with multiple transgenic components is crucial synthetic biology and basic research. For the former field, allow creation of novel biological functions; for latter, such provide potent means dissecting complex pathways. However, size limitations a single transgenesis event challenges associated assembly DNA fragments hinder efficient integration transgenes. To overcome these hurdles, here we introduce building block design termed an integrated genetic array (IGA), which incorporates all into locus prevent their separation during manipulations. Since natural recombination rate genes located in same near zero, construct IGAs developed Super Recombinator (SuRe) system, uses CRISPR/Cas9, alone or combination site-specific serine recombinases, vivo transgene at genomic locus. SuRe effectively doubles number elements assembled each round, exponentially accelerating IGA construction. By preventing elements, greatly reduces screening burdens, as validated through studies Drosophila melanogaster Caenorhabditis elegans . optimize SuRe, compared CRISPR/Cas9-induced homology-directed using various recombinases. Optimized versions achieved efficiency fidelity values theoretical maxima allowed generation recombinant products up 4.2 Mbp Using created fruit flies 12 fluorescence voltage imaging neural activity precisely defined cell-types. Mathematical modeling scalability large assemblies showed that times gene workloads respectively scale logarithmically linearly transgenes, both major improvements over conventional approaches. Overall, enables individual loci, chromosomal scale.
Language: Английский