ArticleMethods and protocols2025
Simplified Protocol for the Purification of Native Cas Nucleases for DNA-Free Genome Editing.
Article in Methods and protocols, 2025. 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
DNA-free genome editing by the direct delivery of CRISPR-associated nucleases has emerged as a promising technology due to its precision and reduced risk of off-target effects. However, existing purification protocols for native Cas proteins require the use of complex instrumentation, which limits their application. Here, we present a simplified protocol for the purification of native Cas9, Cas12RR and dCas9-VP64 nucleases optimized for DNA-free genome editing. Our approach leverages a streamlined affinity and ion exchange chromatography coupled with minimal downstream processing, ensuring a good yield and activity of the purified proteins. The in vitro analysis of the purified ribonucleoprotein complex demonstrated a good efficiency of DNA target cleavage. This simplified protocol increases the opportunity to adopt CRISPR technology, and enables broader access to DNA-free genome editing tools also for laboratories that are not specifically equipped for protein purification.
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