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2015 ; 5
(5
): 908-917
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Cloning-free CRISPR
#MMPMID26527385
Arbab M
; Srinivasan S
; Hashimoto T
; Geijsen N
; Sherwood RI
Stem Cell Reports
2015[Nov]; 5
(5
): 908-917
PMID26527385
show ga
We present self-cloning CRISPR/Cas9 (scCRISPR), a technology that allows for
CRISPR/Cas9-mediated genomic mutation and site-specific knockin transgene
creation within several hours by circumventing the need to clone a site-specific
single-guide RNA (sgRNA) or knockin homology construct for each target locus. We
introduce a self-cleaving palindromic sgRNA plasmid and a short double-stranded
DNA sequence encoding the desired locus-specific sgRNA into target cells,
allowing them to produce a locus-specific sgRNA plasmid through homologous
recombination. scCRISPR enables efficient generation of gene knockouts (?88%
mutation rate) at approximately one-sixth the cost of plasmid-based sgRNA
construction with only 2 hr of preparation for each targeted site. Additionally,
we demonstrate efficient site-specific knockin of GFP transgenes without any
plasmid cloning or genome-integrated selection cassette in mouse and human
embryonic stem cells (2%-4% knockin rate) through PCR-based addition of short
homology arms. scCRISPR substantially lowers the bar on mouse and human
transgenesis.