TARGATT™ CHO Cells
Rapid, Stable CHO Cell Generation for Bioproduction
With our proprietary TARGATT™ technology for site-specific integration of large DNA fragments, we’ve developed a series of TARGATT™ “master” cell lines, including engineered CHO. These cell lines are part of our user-friendly TARGATT™ Knock-In Kits, which you can use to knock in your GOI in your own lab. Using our TARGATT™ CHO cell lines and kits, stable CHO cells containing your gene of interest can be generated as fast as in two weeks. The TARGATT™ CHO can also be used for library construction and screening for new antibodies.
Why choose TARGATT™ CHO Cells?
Chinese Hamster Ovary (CHO) cells have emerged as a popular and versatile choice for biopharmaceutical production and research applications, offering several distinct advantages. Their adaptability to genetic engineering is exemplified by proprietary technologies like TARGATT™, which enables site-specific integration of large DNA fragments. This capability allows for the creation of “master” cell lines that can be easily manipulated to express genes of interest (GOI) with high efficiency. CHO cells are particularly valued for bioproduction of antibodies for example. Together with our TARGATT™ site-specific gene insertion technology, stable CHO cells containing a gene of interest can be generated within two weeks, offering a cost-effective and fast approach for bioproduction.
TARGATT™ CHO Master Cell Lines:
- Site-specific knock in into a high expression, safe harbor locus (H11)
- High efficiency integration >90% with drug selection
- Stable gene insertion intead of transient gene expresion
- BSL1 compatible
TARGATT™ CHO Library Kits
- Large cell library construction in CHO cells
- Development of a mammalian display system with a higher efficiency
- Provide a mammalian display system that can reach E. coli and yeast library sizes
Get Started with Applied StemCell
Contact Information
Reach out to us directly through our contact page for any inquiries. Our team is ready to assist you with your TARGATT™ CHO cell needs.
Request a Quote
Requesting a quote is easy. Provide us with the details of your project, and we will deliver a comprehensive and competitive quote tailored to your specific requirements.
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Technical Details
Figure 1: TARGATT™ Knock-In Strategy. TARGATT™ technology enables fast and site-specific, stable integration of large DNA fragments (up to 22 kb) into an intergenic, transcriptionally active safe harbor locus. We can engineer an “attP” integrase recognition landing pad at a safe harbor locus. Single-copy gene insertion occurs when it is used in conjunction with an “attB” containing donor plasmid and integrase expression.
Support Materials
Frequently Asked Questions
Why does the TARGATT™ knock-in system have high efficiency?
Unlike other recombinases, such as Cre or Flp, the TARGATT™ integrase recognizes and recombines at two largely unrelated sites, attP and attB, in terms of their sequences. Once the integrase-mediated integration at attB and attP takes place, two new hybrid sites, attL and attR are created at the junctions. These new sites are unrecognizable by integrase; therefore, integrase reaction is uni-directional. Once the DNA is integrated, it will not be excised, making the integration process highly efficient. With TARGATT™ integrase system, the gene is integrated in exactly the Rosa26 or H11 locus permanently.Do you have TARGATT™ technology available for Knock-in cell lines?
Yes. We can generate TARGATT™ master cell lines engineered with the “attP” docking site at safe harbor locus.
How many copies of the gene will be inserted into the genome?
A single copy.
What promoters are used to drive gene expression?
Any defined promoters provided by the customer or published in the literature can be used.
What is the specific site that my gene of interest will be integrated into?
Your gene of interest will be specifically inserted at your choice of either of the two well-characterized loci: H11 and Rosa26 (or AAVS1 for cell lines).
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?
To date, the largest DNA fragment we were successfully with is 22 kb. Insertion efficiency appears to decrease with increasing DNA fragment size.
Can I create models to overexpress a gene of interest?
Yes, TARGATT™ system is ideal for gene over-expression. Different promoters, e.g., tissue-specific promoters or ubiquitous promoters, and inducible systems (Tet On/Off, loxP-stop-loxP) can be used for tissue-specific, ubiquitous, or inducible gene expression.
Can I integrate a reporter gene? What kind of reporter genes do you recommend?
Yes, you can express any reporter genes such as GFP, DsRed, mCherry, LacZ, Luciferase, and others.
Besides H11, can a gene be inserted at other loci?
Yes. This would be a customized service. We need to first insert the docking attP site into a desired locus using CRISPR/Cas9 and then insert the gene of interest into the attP site using TARGATT™.