ArticlebioRxiv : the preprint server for biology2026
Structure of the Type I-F3 CAST holo integration complex reveals licensing mechanisms during RNA-guided DNA integration.
Article in bioRxiv : the preprint server for biology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Precise genomic integration of large DNA cargo remains a central challenge in genome engineering. In this context, CRISPR-associated transposases (CASTs) offer a promising solution by coupling RNA-guided DNA recognition to transposon-mediated integration. Type I-F3 CASTs exhibit exceptional targeting fidelity, making them a leading focus for biotechnology and gene therapy applications. Yet, despite extensive characterization, the structural basis for RNA-guided DNA integration of type I-F3 CASTs has remained elusive. Here, using cryo-EM and functional assays, we report the structural licensing mechanism of the
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