Homology-directed gene repair Sequence correction xx exogenous repair substrate Rad51… sister chromatids I-SceI
Homology-directed gene repair Sequence correction xx exogenous repair substrate Rad51… sister chromatids I-SceI
DRGFP reporter puro R I-SceISTOPBcgI puro R BcgI GFP + gene conversion CACA CACA
293T stable DRGFP (S8) no DNA pCMV-I-SceI 48 hrs 72 hrs
Direct Repeat Reporters: recombination in cis
293T DRGFP (cis) I-SceI DRGFP+I-SceI DRGFP
293T DRGFP-lacO (cis) DRGFPlacO DRGFPlacO+I-SceI
Exogenous Donor Reporter: recombination in trans
293T ZFGFP + iGFP (trans) ZFGFP+iGFPZFGFP+iGFP+I-SceI
293T ZFGFP-lacO + iGFP (trans) ZFGFP-lacOZFGFP-lacO+iGFP+I-SceI
Too Much DNA?
293T: Efficiency of Transient Transfection ng eGFP no DNA 1.0 g eGFP2.0 g eGFP4.0 g eGFP 62 ng eGFP125 ng eGFP250 ng eGFP
“Stable” DRGFP?
“Stable” DRGFP (puro S ) No DNA CMV-Sce 48 hrs73 hrs98 hrs
“Stable” DRGFP (puro R ) No DNA CMV-Sce 48 hrs73 hrs98 hrs
Plans Lines with integrated trans reporter –Enhance repair by tethering chromatin modifiers and repair factors Back to B-cells