PUBLICATION

Highly Efficient CRISPR-Cas9-Based Methods for Generating Deletion Mutations and F0 Embryos that Lack Gene Function in Zebrafish

Authors
Hoshijima, K., Jurynec, M.J., Klatt Shaw, D., Jacobi, A.M., Behlke, M.A., Grunwald, D.J.
ID
ZDB-PUB-191112-4
Date
2019
Source
Developmental Cell   51(5): 645-657.e4 (Journal)
Registered Authors
Grunwald, David, Hoshijima, Kazuyuki, Jurynec, Michael
Keywords
CRISPR-Cas9 mutagenesis, F0 screen, deletion mutations, genome editing, targeted mutagenesis, zebrafish genetics
MeSH Terms
  • Animals
  • CRISPR-Cas Systems*
  • Embryo, Nonmammalian/metabolism
  • Gene Deletion*
  • Gene Editing/methods*
  • Loss of Function Mutation
  • Zebrafish/genetics*
PubMed
31708433 Full text @ Dev. Cell
Abstract
Inconsistent activity limits the use of CRISPR-Cas9 in zebrafish. We show supernumerary guanine nucleotides at the 5' ends of single guide RNAs (sgRNAs) account for diminished CRISPR-Cas9 activity in zebrafish embryos. Genomic sequences can be targeted consistently with extremely high efficiency using Cas9 ribonucleoproteins (RNPs) containing either a sgRNA molecule or a synthetic crRNA:tracrRNA duplex that perfectly matches the protospacer target site. Following injection of zebrafish eggs with such RNPs, virtually every copy of a targeted locus harbors an induced indel mutation. Loss of gene function is often complete, as F0 embryos closely resemble true null mutants without detectable non-specific effects. Mosaicism is sufficiently low in F0 embryos that cell non-autonomous gene functions can be probed effectively and redundant activities of genes can be uncovered when two genes are targeted simultaneously. Finally, heritable deletion mutations of at least 50 kbp can be readily induced using pairs of duplex guide RNPs targeted to a single chromosome.
Genes / Markers
Figures
Expression
Phenotype
Mutation and Transgenics
Human Disease / Model Data
Sequence Targeting Reagents
Fish
Antibodies
Orthology
Engineered Foreign Genes
Mapping
Errata and Notes