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Nat Methods. 2015 Jun;12(6):535-40. doi: 10.1038/nmeth.3360. Epub 2015 Apr 13.

Rapid reverse genetic screening using CRISPR in zebrafish.

Author information

1
Division of Basic Sciences, Fred Hutchinson Cancer Research Center, Seattle, Washington, USA.

Abstract

Identifying genes involved in biological processes is critical for understanding the molecular building blocks of life. We used engineered CRISPR (clustered regularly interspaced short palindromic repeats) to efficiently mutate specific loci in zebrafish (Danio rerio) and screen for genes involved in vertebrate biological processes. We found that increasing CRISPR efficiency by injecting optimized amounts of Cas9-encoding mRNA and multiplexing single guide RNAs (sgRNAs) allowed for phenocopy of known mutants across many phenotypes in embryos. We performed a proof-of-concept screen in which we used intersecting, multiplexed pool injections to examine 48 loci and identified two new genes involved in electrical-synapse formation. By deep sequencing target loci, we found that 90% of the genes were effectively screened. We conclude that CRISPR can be used as a powerful reverse genetic screening strategy in vivo in a vertebrate system.

PMID:
25867848
PMCID:
PMC4667794
DOI:
10.1038/nmeth.3360
[Indexed for MEDLINE]
Free PMC Article

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