TARGATT™ Genome Editing
Applied StemCell’s proprietary TARGATT™ technology, enables site-specific, stable integration of large DNA fragments into a safe harbour locus more efficiently and faster, with guaranteed transgene expression. The TARGATT™ gene-editing platform is versatile and can generate large fragment knock-in animal or cell line models. This technology circumvents problems associated with random integration such as position effect, and gene silencing or instability due to integration of multiple copies of the transgene. Applications for TARGATT™ models: Transgene overexpression models, reporter gene knock-in, conditional knock-in, inducible expression, Cre-driver lines and humanized animal models.
TARGATT™ Genome Editing Categories
TARGATT™ Site Specific
TARGATT™ Site-Specific
Knock-in Rat
TARGATT™ Site-Specific
Knock-in Cell Line Service
TARGATT™ High Resolution Protein Screening
Products and Services
Support Materials
Brochures/ Flyers:
TARGATT™ Mouse/ Rat Model Generation Animal Model Generation Cell Line Model Generation Custom Services BrochurePosters:
Cre Driver Rats: Spatial and Temporal Gene Expression for Human Diseases Production of site-specific transgenic mice using the TARGATTTM knock-in technology TARGATT-Cre-Rats-WPC-201805 TARGATT-CellLines-CellLineEngineering-201806 CRISPR-TARGATT-iPSCGeneEditing-WPC-201706Webinars:
How-to Guide for TARGATT™ Transgenic Kit: Dr Ruby Chen-Tsai Choosing the Right Genome Editing Technology for Your Mouse Models: CRISPR, TARGATT™ and Beyond...: Dr. Carlisle Landel TARGATT™: A Mammalian System for Antibody/ Protein Library Screening (October 2018)
FAQs
Can I create models to overexpress a gene of interest?
Can I use TARGATT™ system to create transgenic models with tissue-specific gene expression?
What promoters are used to drive gene expression?
What is the specific site that my gene of interest will be integrated into?
Besides H11 and Rosa26, can gene be inserted at other loci?
Can I integrate a reporter gene? What kind of reporter genes do you recommend?
What is the maximum size of a gene you can insert? Will the efficiency of your system be affected if the gene is too large?
Why does the TARGATT™ knock-in system have high efficiency?
How many copies of the gene will be inserted into the genome?
Do you have TARGATT™ technology available for Knock-in cell lines?
Technical Details
Advantages of TARGATT™ Technology:
- High integration efficiency (up to 40%)
- Large transgene knock-in (up to 22 kb)
- Reduced time and cost
- Guaranteed, high level expression of the transgene
- Site-specificity allows a precise comparison of the effects of the transgenes among different lines
- Site-specific knock-in at pre-selected locus overcomes challenges associates with random integration:
- Eliminates position effect
- Integration at intergenic region ensures that no internal genes are interrupted
- Single copy gene integration eliminates repeat-induced gene silencing and genomic instability
Choosing the right genome editing technology: Applied StemCell uses two complementary genome editing technologies to generate advanced cell line and animal models very efficiently and effectively: the CRISPR/Cas9 technology and our propriety site-specific gene integration technology, TARGATT™ for large fragment (up to 22 kb) knock-in into a safe harbor locus.
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Project Purpose |
CRISPR/Cas9 |
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Knock-Out (KO) |
Yes |
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Point Mutation |
Yes |
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Conditional KO |
Yes |
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Knock-In (<200 Nucleotide ssODN Donor) |
Yes |
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Knock-In Transgenes in Safe Harbor Loci (>2kb) |
Challenging (but limitations on size) |
Yes (up to 22kb) |
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Knock-In (Plasmid DNA) |
Challenging (but limitations on size) |
Yes (2 steps: KI docking site; KI transgene) |
Publications
Book Chapters
- Chen-Tsai, R. Y. (2020). Integrase-Mediated Targeted Transgenics Through Pronuclear Microinjection. In Transgenic Mouse (pp. 35-46). Humana, New York, NY.
- Chen-Tsai, R. Y. (2019). Using TARGATT™ Technology to Generate Site-Specific Transgenic Mice. In Microinjection (pp. 71-86). Humana Press, New York, NY.
Description of the technology
- Chi, X., Zheng, Q., Jiang, R., Chen-Tsai, R. Y., & Kong, L. J. (2019). A system for site-specific integration of transgenes in mammalian cells. PLOS ONE, 14(7), e0219842.
- Zhu, F., Gamboa, M., Farruggio, A. P., Hippenmeyer, S., Tasic, B., Schüle, B., ... & Calos, M. P. (2013). DICE, an efficient system for iterative genomic editing in human pluripotent stem cells. Nucleic acids research, 42(5), e34-e34.
- Tasic, B., Hippenmeyer, S., Wang, C., Gamboa, M., Zong, H., Chen-Tsai, Y., & Luo, L. (2011). Site-specific integrase-mediated transgenesis in mice via pronuclear injection. Proceedings of the National Academy of Sciences, 108(19), 7902-7907.
Commentary, comparison with other transgenic methods
- Rossant, J., Nutter, L. M., & Gertsenstein, M. (2011). Engineering the embryo. Proceedings of the National Academy of Sciences, 108(19), 7659-7660.
Tet inducible mice generated by TARGATT™
- Fan, X., Petitt, M., Gamboa, M., Huang, M., Dhal, S., Druzin, M. L., ... & Nayak, N. R. (2012). Transient, inducible, placenta-specific gene expression in mice. Endocrinology, 153(11), 5637-5644.
Advantage of Hipp11 (H11) locus
- Hippenmeyer, S., Youn, Y. H., Moon, H. M., Miyamichi, K., Zong, H., Wynshaw-Boris, A., & Luo, L. (2010). Genetic mosaic dissection of Lis1 and Ndel1 in neuronal migration. Neuron, 68(4), 695-709.
Application for mice generated by TARGATT™
- Matharu, N., Rattanasopha, S., Tamura, S., Maliskova, L., Wang, Y., Bernard, A., ... & Ahituv, N. (2018). CRISPR-mediated activation of a promoter or enhancer rescues obesity caused by haploinsufficiency. Science, eaau0629.
- Chen-Tsai, R. Y. (2019). Using TARGATT™ Technology to Generate Site-Specific Transgenic Mice. In Microinjection (pp. 71-86). Humana Press, New York, NY
- Barrett, R. D., Laurent, S., Mallarino, R., Pfeifer, S. P., Xu, C. C., Foll, M., ... & Hoekstra, H. E. (2018). The fitness consequences of genetic variation in wild populations of mice. bioRxiv, 383240.
- Ibrahim, L. A., Huang, J. J., Wang, S. Z., Kim, Y. J., Li, I., & Huizhong, W. (2018). Sparse Labeling and Neural Tracing in Brain Circuits by STARS Strategy: Revealing Morphological Development of Type II Spiral Ganglion Neurons. Cerebral Cortex, 1-14.
- Kumar, A., Dhar, S., Campanelli, G., Butt, N. A., Schallheim, J. M., Gomez, C. R., & Levenson, A. S. (2018). MTA 1 drives malignant progression and bone metastasis in prostate cancer. Molecular oncology.
- Jang, Y., Broun, A., Wang, C., Park, Y. K., Zhuang, L., Lee, J. E., ... & Ge, K. (2018). H3. 3K4M destabilizes enhancer H3K4 methyltransferases MLL3/MLL4 and impairs adipose tissue development. Nucleic acids research. https://doi.org/10.1093/nar/gky982
- Tang, Y., Kwon, H., Neel, B. A., Kasher-Meron, M., Pessin, J., Yamada, E., & Pessin, J. E. (2018). The fructose-2, 6-bisphosphatase TIGAR suppresses NF-κB signaling by directly inhibiting the linear ubiquitin assembly complex LUBAC. Journal of Biological Chemistry, jbc-RA118.
- Chen, M., Geoffroy, C. G., Meves, J. M., Narang, A., Li, Y., Nguyen, M. T., ... & Elzière, L. (2018). Leucine Zipper-Bearing Kinase Is a Critical Regulator of Astrocyte Reactivity in the Adult Mammalian CNS. Cell Reports, 22(13), 3587-3597
- Kido, T., Sun, Z., & Lau, Y.-F. C. (2017). Aberrant activation of the human sex-determining gene in early embryonic development results in postnatal growth retardation and lethality in mice. Scientific Reports, 7, 4113. http://doi.org/10.1038/s41598-017-04117-6.
- Nouri, N., & Awatramani, R. (2017). A novel floor plate boundary defined by adjacent En1 and Dbx1 microdomains distinguishes midbrain dopamine and hypothalamic neurons. Development, 144(5), 916-927.
- Li, K., Wang, F., Cao, W. B., Lv, X. X., Hua, F., Cui, B., ... & Yu, J. M. (2017). TRIB3 Promotes APL Progression through Stabilization of the Oncoprotein PML-RARα and Inhibition of p53-Mediated Senescence. Cancer Cell, 31(5), 697-710.
- Jiang, T., Kindt, K., & Wu, D. K. (2017). Transcription factor Emx2 controls stereociliary bundle orientation of sensory hair cells. eLife, 6, e23661.
- Booze, M. L., Hansen, J. M., & Vitiello, P. F. (2016). A Novel Mouse Model for the Identification of Thioredoxin-1 Protein Interactions. Free Radical Biology & Medicine, 99, 533–543. http://doi.org/10.1016/j.freeradbiomed.2016.09.013.
- Feng, D., Dai, S., Liu, F., Ohtake, Y., Zhou, Z., Wang, H., ... & Hayat, U. (2016). Cre-inducible human CD59 mediates rapid cell ablation after intermedilysin administration. The Journal of clinical investigation, 126(6), 2321-2333.
- Sun, N., Yun, J., Liu, J., Malide, D., Liu, C., Rovira, I. I., … Finkel, T. (2015). Measuring in vivo mitophagy. Molecular Cell, 60(4), 685–696. http://doi.org/10.1016/j.molcel.2015.10.009.
- Devine, W. P., Wythe, J. D., George, M., Koshiba-Takeuchi, K., & Bruneau, B. G. (2014). Early patterning and specification of cardiac progenitors in gastrulating mesoderm. eLife, 3, e03848. http://doi.org/10.7554/eLife.03848.
- Fogg, P. C. M., Colloms, S., Rosser, S., Stark, M., & Smith, M. C. M. (2014). New Applications for Phage Integrases. Journal of Molecular Biology, 426(15), 2703–2716. http://doi.org/10.1016/j.jmb.2014.05.014.
- Chen-Tsai, R. Y., Jiang, R., Zhuang, L., Wu, J., Li, L., & Wu, J. (2014). Genome editing and animal models. Chinese science bulletin, 59(1), 1-6.
- Park, K.-E., Park, C.-H., Powell, A., Martin, J., Donovan, D. M., & Telugu, B. P. (2016). Targeted Gene Knockin in Porcine Somatic Cells Using CRISPR/Cas Ribonucleoproteins. International Journal of Molecular Sciences, 17(6), 810. http://doi.org/10.3390/ijms17060810.
- Guenther, C. A., Tasic, B., Luo, L., Bedell, M. A., & Kingsley, D. M. (2014). A molecular basis for classic blond hair color in Europeans. Nature Genetics, 46(7), 748–752. http://doi.org/10.1038/ng.2991.
- Villamizar, C. A. (2014). Characterization of the vascular pathology in the acta2 r258c mouse model and cerebrovascular characterization of the acta2 null mouse. UT GSBS Dissertations and These (Open Access). Paper 508 (2014)
