CRISPRseek: Design of target-specific guide RNAs in CRISPR-Cas9, genome-editing systems
Version 1.16.0

The package includes functions to find potential guide RNAs for input target sequences, optionally filter guide RNAs without restriction enzyme cut site, or without paired guide RNAs, genome-wide search for off-targets, score, rank, fetch flank sequence and indicate whether the target and off-targets are located in exon region or not. Potential guide RNAs are annotated with total score of the top5 and topN off-targets, detailed topN mismatch sites, restriction enzyme cut sites, and paired guide RNAs. If GeneRfold and GeneR are installed (,, then the minimum free energy and bracket notation of secondary structure of gRNA and gRNA backbone constant region will be included in the summary file. This package leverages Biostrings and BSgenome packages.

Package details

AuthorLihua Julie Zhu, Benjamin R. Holmes, Herve Pages, Michael Lawrence, Isana Veksler-Lublinsky, Victor Ambros, Neil Aronin and Michael Brodsky
Bioconductor views CRISPR GeneRegulation SequenceMatching
MaintainerLihua Julie Zhu <>
LicenseGPL (>= 2)
Package repositoryView on Bioconductor
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CRISPRseek documentation built on May 31, 2017, 10:57 a.m.