Foxp3 Knockin mouse models
Foxp3, the mouse ortholog of human FOXP3, encodes a forkhead-box transcription factor whose FKH DNA-binding domain, leucine zipper dimerization region, and N-terminal repressor module nucleate large complexes with Runx1/CBFβ, NFAT, Eos, and the NuRD and CoREST corepressors to enforce the regulatory T cell program, repressing Il2 while sustaining Il2ra, Ctla4, and Ikzf2. Lineage specification requires sustained TCR signaling plus demethylation of conserved noncoding sequence 2, which locks heritable expression; loss produces the scurfy phenotype, an X-linked fatal lymphoproliferative wasting syndrome in hemizygous males that mirrors human IPEX. Design decisions follow directly. Null and conditional alleles ask whether Treg identity is required in a given tissue or temporal window, Cre and reporter knockins (including inducible Foxp3-CreERT2 for fate mapping or diphtheria-toxin ablation) resolve lineage stability, and IPEX point-mutation or humanized alleles interrogate patient variants. No paralog substitutes for Foxp3, so deletion timing and driver fidelity, not redundancy, dominate interpretation.
Knockin designs at Foxp3 support head to head comparisons between wild type and modified alleles because regulatory DNA stays in place.
What Foxp3 Knockin mouse models are available?
ingenious targeting laboratory offers 7 distinct Foxp3 knockin catalog mouse models. Researchers can order pre-developed catalog lines or request a custom mouse model, including humanized, knockin, and transgenic variations with verified germline transmission.
Catalog table
| Model | Type | Category | Availability | Catalog # | Action |
|---|---|---|---|---|---|
| Foxp3-DreERT2 | Knockin | Cre/Dre Toolbox of Mice | sperm cryopreservation | KI 200198 | Inquire |
| Foxp3-IRES-tdTomato-2A-CreERT2 | Knockin | Cre/Dre Toolbox of Mice, fluorescent mouse | live | KI 190120 | Inquire |
| Foxp3-IRES-tdTomato-2A-Cre | Knockin | Cre/Dre Toolbox of Mice, fluorescent mouse, disease model mice | live | KI 190119 | Inquire |
| Foxp3-IRES-Luc-2A-tdTomato | Knockin | fluorescent mouse | embryo cryopreservation | KI 200065 | Inquire |
| Foxp3-IRES-DTR-2A-tdTomato(BALB/c) | Knockin | fluorescent mouse, otherToolbox of Mice(Non-Cre, fluorescent) | live | KI 200213 | Inquire |
| Foxp3-V5-AviTag-IRES-Luc-2A-tdTomato | Knockin | fluorescent mouse, otherToolbox of Mice(Non-Cre, fluorescent) | embryo cryopreservation | KI 18034 | Inquire |
| Foxp3-IRES-DTRGFP | Knockin | fluorescent mouse, otherToolbox of Mice(Non-Cre, fluorescent) | embryo cryopreservation | KI 190046 | Inquire |
Designing a Foxp3 Knockin allele
Cassette placement is the main hazard, because the conserved noncoding sequence 2 enhancer and its demethylated regulatory region lie inside the locus and control heritable expression; a selection marker or reporter that perturbs them destabilizes the lineage and confounds everything downstream, so excise selection with Flp and sequence the region afterward. Amino terminal fluorescent fusions have been reported to alter protein function and regulatory T cell fitness, so prefer a bicistronic or T2A configuration and confirm protein per cell matches wild type. Structure guided substitutions in the leucine zipper block dimerization while sparing DNA binding, and changes in the amino terminal repressor module disrupt corepressor recruitment, giving separation of function alleles no null can provide. Read out suppression assays, methylation state of the regulatory region, target gene occupancy, and lineage stability under inflammatory challenge.
Knockin and humanized formats keep regulatory context at the endogenous locus. For your target tissue focused programs, that matters when expression timing, splice isoforms, or allele dosage drive biology. Random integration transgenics can still help, but targeted alleles usually give cleaner pharmacology readouts.
Pricing and quotes
The Foxp3 Knockin lines listed above are catalog models. Send us the catalog number and our team confirms current availability, pricing, and whether the line ships cryopreserved or live.
If your study needs a Foxp3 allele configuration that is not listed above, our scientific team designs and generates it. Model generation quotes return in about twenty four hours with project milestones and pricing.
FAQ
What Foxp3 Knockin mouse models are available?
When Foxp3 Knockin lines are in catalog, we ship from inventory. If your configuration is not listed, we design the allele to order. Common paths include conditional knockout, constitutive knockout, humanized, knockin, and transgenic options, with documented germline transmission and United States QC.
Is Foxp3 knockout embryonic lethal in mice?
It depends on background and allele design. Some Foxp3 germline knockouts are viable. Others need conditional alleles or mixed backgrounds. We review publications and our own experience, then recommend floxed versus null before you commit.
Which Cre driver is best for experiments?
Driver choice depends on onset timing, recombination efficiency, and known leak. We map your organ and cell type to a short list of proven Cre lines, then talk through reporter crosses and controls. We favor drivers with strong community validation for your tissue.
Do you ship live Foxp3 animals?
When catalog lines are live, we ship with health certificates and QC documentation. If your exact combo is not listed, we quote a generation project with cryo or live dispatch depending on cohort timing and geography.
How do I request a quote for Foxp3?
Use the catalog inquire buttons or the request quote form. Include your allele goal, Cre plan if any, strain background, and cohort size. A PhD led team responds with pricing, milestones, and the fastest path to experimental animals.