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Sleeping beauty transposon‐mediated poly(A)‐trapping and insertion mutagenesis in mouse embryonic stem cells
Author(s) -
Zhao Yi,
Song Guili,
Ren Jing,
Li Qing,
Zhong Shan,
Cui Zongbin
Publication year - 2018
Publication title -
environmental and molecular mutagenesis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1
H-Index - 87
eISSN - 1098-2280
pISSN - 0893-6692
DOI - 10.1002/em.22234
Subject(s) - biology , transposable element , mutagenesis , transposase , transposon mutagenesis , mutant , gene , microbiology and biotechnology , genetics , sleeping beauty transposon system , embryonic stem cell , gene targeting
Saturation mutagenesis of all endogenous genes within the mouse genome remains a challenging task, although a plenty of gene‐editing approaches are available for this purpose. Here, a poly(A)‐trap vector was generated for insertion mutagenesis in mouse embryonic stem (mES) cells. This vector contains an expression cassette of neomycin (Neo)‐resistant gene lacking a poly(A) signal and flanked by two inverted terminal repeats of the Sleeping Beauty (SB) transposon. The whole poly(A)‐trap cassette can transpose into target TA dinucleotides, properly splice with endogenous genes and effectively interrupt the transcription of trapped genes in mES cells after transient induction of SB expression by doxycycline (DOX)‐treatment at 1 μg/ml, leading to the formation of multiple geneticin (G418)‐resistant cell clones. In the first round of mutation screening, we identified six transposition events from 23 cell clones, including four inserted into an endogenous gene and two landed between endogenous genes. The abilities of self‐renewal, totipotency, genetic stability and differentiation of syngap1 +/− cells were not affected by DOX‐treatment and G418‐selection. These findings suggest that this SB transposon‐mediated poly(A)‐trap vector can be used as an alternative tool for a large‐scale screening of mES cells with a gene mutation and for further generation of mutant mouse strains. Environ. Mol. Mutagen. 59:687–697, 2018. © 2018 Wiley Periodicals, Inc.