{
  "id": 7248995,
  "title": "Modular click-chemistry-based engineering minimally perturbs CRISPR ribonucleoprotein formation for genome imaging applications",
  "url": "https://urgent.news/2026/09/13/modular-click-chemistry-based-engineering-minimally-perturbs-crispr",
  "topic": "science",
  "section": "Science",
  "published": "2026-09-13T00:00:00.000Z",
  "source": {
    "name": "bioRxiv",
    "slug": "biorxiv",
    "url": "https://www.biorxiv.org/content/10.64898/2026.09.10.750574v1?rss=1"
  },
  "original_language": "en",
  "account": "CRISPR-Cas9 serves as a crucial tool for genome imaging due to its ability to bind DNA specifically. Researchers have devised complex modifications to CRISPR-Cas9, often relying on expression-based delivery. However, these strategies frequently disrupt the structure, and their effectiveness is contingent upon vector design and in vivo CRISPR ribonucleoprotein (RNP) assembly. Previous research has primarily concentrated on refining the expression-based delivery systems, leaving the core engineering process underexplored.\n\nWe have devised a modular SPAAC (bio-orthogonal strain-promoted azide-alkyne cycloaddition) click-chemistry-based approach to engineer CRISPR RNP, which operates independently of assembly. This strategy allows for the modification of CRISPR with fluorophores and DNA at various stages of RNP in vitro assembly. We have tested this technology for genome imaging purposes. Our findings indicate that engineering the native CRISPR RNP after its formation reduces structural perturbations and results in a twofold increase in the accessibility of the clicked DNA.\n\nFurthermore, we have employed SPAAC to attach non-native RNA-DNA hybrids, irrespective of their 5' to 3' directionality, thereby creating a covalently-attached rolling-circle signal amplification approach. The modularity and versatility of our method hold the promise of significant advancements in both CRISPR imaging and prime-editing domains.",
  "summary": "CRISPR-Cas9 has become a key genome imaging tool, because of its sequence-specific binding to genomic DNA. To achieve signal amplification or multiplexing, various complex CRISPR-Cas9 modifications were introduced, primarily relying on expression-based delivery. However, these engineering strategies often invoke structural perturbations and their performance remained dictated by vector design and…",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}