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CRISPR Knock-in
HDR Repair Vectors

Signosis CRISPR HDR Repair-Ready Vectors enable precise knock‑ins and sequence corrections using a flexible two‑vector system. Pair our Cas9 Knockout Vector with our CRISPR HDR Knock-in Vectors, available with prebuilt safe‑harbor donors (mROSA26, hAAVS1) or fully customized templates for any genomic locus.

Principle 

Signosis' CRISPR Homology-Directed Repair (HDR) Repair System delivers accurate, template‑driven genome editing through a streamlined two‑vector workflow. A dedicated Cas9 Knockout Vector creates a targeted double‑strand break, while a separate HDR knock-in Vector supplies either a prebuilt or fully customized donor template for precise knock‑ins, tag additions, or sequence corrections. This modular design provides maximum editing flexibility, enabling rapid use of validated safe‑harbor donors (mROSA26 and hAAVS1) while supporting custom HDR designs for any gene or genomic site. Ideal for reporter knock‑ins, protein tagging, functional rescue experiments, and targeted gene correction.

CRISPR HDR gene editing is a two‑step process:

  1. Cas9 Knockout Vector (KO Vector)

    • Expresses Cas9 and a locus‑specific gRNA

    • Creates the necessary DNA break at the target site

  2. HDR knock-in Vector:

    • Delivers a donor template with homology arms

    • Guides precise DNA repair via homology‑directed repair

 

By separating the cut and repair functions into two vectors, the system maximizes editing efficiency, reduces vector size constraints, and supports a wider range of donor template configurations.​​

Key Features

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Validated, Ready-to-use Safe‑Harbor Donor Templates targeting:

  • mROSA26 (mouse)

  • hAAVS1 (human)

   Ideal for stable expression, reporter integration, and predictable knock‑ins.

Two‑Vector CRISPR knock-in HDR Workflow

  • A modular system separating Cas9/gRNA knockout from HDR donor delivery, improving flexibility and transfection efficiency.

Fully Custom Donor Template Capability
Design knockout‑compatible donor plasmids for:

  • Any gene or genomic locus

  • SNP corrections

  • Epitope or fluorescent tags

  • Functional domains

  • Regulatory motifs

  • Sequence replacements

 

All‑in‑One Constructs for Each Step

  • KO Vector includes Cas9 + gRNA

  • HDR knock-in vector contains donor template + homology arms

Optimized Homology Arms

  • Balanced arm lengths and sequence design for high HDR efficiency.

Broad Application Compatibility

  • Supports use in multiple cell lines, including hard‑to‑edit systems.

hAASV1 HDR control vector map

Benefits

High-precision

Crispr technology allows clean, precise gene insertion via HDR-based editing

Reliable, Consistent Performance

Standardized backbones across all vectors allow for consistent results 

Modular 2‑vector system 

Mix and Match between different HDR vectors for target customization

Easy Transfection

One vector for each part of the process simplifies delivery and reduces variability

Fast and Efficient workflows

Use prebuilt safe-harbor donors templates to ensure stable, predictable, non-disruptive knock-ins.

Customizable

Both sgRNAs and donor templates can be tailored to your target of interest

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