Smad3 Knockout mouse models
Lacking the exon 3 insert that keeps SMAD2 off DNA, the protein encoded by Smad3 (human SMAD3) binds CAGAC SMAD-binding elements directly through its MH1 domain after ALK5 phosphorylates its carboxy-terminal SSVS motif, then trimerizes with SMAD4 and cooperates with AP-1, TCF and FOXO factors to drive collagen, Serpine1 and Foxp3 transcription. This direct DNA engagement makes it the dominant effector for TGF beta driven fibrosis, epithelial to mesenchymal transition and induced regulatory T cell generation. Human loss-of-function mutations cause aneurysm-osteoarthritis syndrome, a Loeys-Dietz variant, providing a knockin rationale distinct from deletion. Constitutive nulls are viable with immune dysregulation, colorectal tumors and protection from experimental fibrosis, so conditional alleles are needed chiefly to separate stromal, epithelial and T cell compartments. Given that Smad2 and Smad3 diverge in DNA binding rather than receptor use, allele selection should follow whether the endpoint is transcriptional output or receptor-proximal signaling.
A conventional Smad3 knockout removes gene function in all cells that inherit the allele. It is a proven first pass for target validation when redundancy is low.
What Smad3 Knockout mouse models are available?
ingenious targeting laboratory offers 2 distinct Smad3 knockout 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.
Why this approach
A conventional knockout answers whether the gene is required broadly. When your target tissue is the organ of interest, a global null can still be informative if viability is acceptable and you want the simplest genotype. If the null is harsh, a floxed allele with a regional Cre is the safer long term platform.
Pricing and quotes
The Smad3 Knockout 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 Smad3 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 Smad3 Knockout mouse models are available?
When Smad3 Knockout 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 Smad3 knockout embryonic lethal in mice?
It depends on background and allele design. Some Smad3 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 Smad3 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 Smad3?
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.