Efficient identification of TALEN‐mediated genome modifications using heteroduplex mobility assays

The heteroduplex mobility assay (HMA) is widely used to characterize strain variants of human viruses. To determine whether it can detect small sequence differences in homologous templates, we constructed a series of deletion constructs (1–10 bp deletions) in the multiple cloning site (MCS) of pBlue...

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Bibliographic Details
Published in:Genes to cells : devoted to molecular & cellular mechanisms 2013-06, Vol.18 (6), p.450-458
Main Authors: Ota, Satoshi, Hisano, Yu, Muraki, Michiko, Hoshijima, Kazuyuki, Dahlem, Timothy J., Grunwald, David J., Okada, Yasushi, Kawahara, Atsuo
Format: Article
Language:English
Subjects:
Animals
Deoxyribonucleases - metabolism
Genome - genetics
Heteroduplex Analysis
INDEL Mutation - genetics
Zebrafish - genetics
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Summary:The heteroduplex mobility assay (HMA) is widely used to characterize strain variants of human viruses. To determine whether it can detect small sequence differences in homologous templates, we constructed a series of deletion constructs (1–10 bp deletions) in the multiple cloning site (MCS) of pBluescript II. After PCR amplification of the MCS using a mixture of wild‐type and one of the deletion constructs, the resulting PCR amplicons were electrophoresed using 15% polyacrylamide gels. Two types of heteroduplexes exhibited retarded electrophoretic migration compared with individual homoduplexes. Therefore, we applied this HMA to detect transcription activator‐like effector nucleases (TALEN)‐induced insertion and/or deletion (indel) mutations at an endogenous locus. We found that TALEN in vivo activity was easily estimated by the degree of multiple HMA profiles derived from TALEN‐injected F0 embryos. Furthermore, TALEN‐injected F0 founder fish produced several unique HMA profiles in F1 embryos. Sequence analysis confirmed that the different HMA profiles contained distinct indel mutations. Thus, HMA is a rapid and sensitive analytical method for the detection of the TALEN‐mediated genome modifications.
ISSN:1356-9597
1365-2443
DOI:10.1111/gtc.12050