Protospacer

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Protospacer allows researchers to build, analyze, and share their own database of CRISPR target-sites. This enables the development of custom libraries and helps to transfer the CRISPR technology to new organisms. Each Protospacer database is a simple catalogue of all possible Cas9 target-sites within a given FASTA sequence, i.e. all NGG/NAG sites. Protospacer then allows the user to sub-select targets from the database by gene ID, by exon/intron/UTR location, by sequence similarity, or by genomic co-ordinate. From here, users are able to evaluate potential off targeting, to export results in FASTA format or tabulated (e.g. for Microsoft Excel), and to connect to the Integrative Genomics Viewer (IGVref) and view target-sites in the context of genomic annotations, amino acid translations, and HT-Seq data (for off-target validation). We provide online video tutorials and a toy database from our main website.