multicrispr

multicrispr designs guide RNAs for CRISPR/Cas9 applications, including prime editing, APEX proximity labeling, and homology-directed repair, and supports large-scale parallel targeting and gRNA library generation.

Key Features:

• Parallel Targeting Capability: Designs gRNA libraries for simultaneous targeting of thousands of genomic loci for high-throughput applications.
• Efficiency and Specificity Scoring: Evaluates potential gRNAs based on predicted efficiency and specificity.
• Off-target Filtering: Filters out gRNAs with predicted off-target effects to reduce unintended genomic alterations.
• Visualization and Aggregation: Provides aggregation and analysis of results per target or CRISPR/Cas9 sequence for downstream interpretation.
• Genomic Range and Sequence Output: Returns genomic ranges and sequences of selected gRNAs.
• Generic Genomic Arithmetic Framework: Implements a generic genomic arithmetic framework to support diverse and evolving CRISPR methodologies.
• Target Set–Specific Filtering: Applies target set–specific filtering criteria when designing gRNA libraries for screening-like approaches.

Scientific Applications:

• High-throughput genetic screens: Generation of large gRNA libraries for screening thousands of genomic loci.
• Prime editing and HDR: gRNA design tailored for prime editing workflows and homology-directed repair experiments.
• APEX proximity labeling of proteins: gRNA selection to support CRISPR/Cas9-assisted APEX-based proximity labeling studies.
• Functional genomics and therapeutic development: Precise gRNA design for studies of gene function and development of genome-editing–based therapeutics.

Methodology:

Designs gRNA libraries for large-scale targeting; evaluates predicted gRNA efficiency and specificity; filters gRNAs with potential off-target effects and applies target set–specific filters; returns genomic ranges and sequences of selected gRNAs; supports aggregation and visualization within a generic genomic arithmetic framework.