Human SMAD3 ELISA Kit (RMEK-0152905)
Cat. No.: RMEK-0152905
Category: ELISA Kits
INQUIRY
1 x 96 tests
Human SMAD3 ELISA Kit is a single-wash 90 min sandwich ELISA designed for the quantitative measurement of SMAD3 protein in cell lysate. The technology employs capture antibodies conjugated to an affinity tag that is recognized by the monoclonal antibody used to coat our plates. This approach to sandwich ELISA allows the formation of the antibody-analyte sandwich complex in a single step, significantly reducing assay time.
Product Features
| Species Reactivity | Human |
|---|---|
| Detection Method | Colorimetric |
| Assay Duration | One step assay |
| Assay Time | 1.5 h |
| Assay Type | Sandwich (quantitative) |
| Precision | Intra-Assay-Extract-8-1.2%; Inter-Assay-Extract-3-1.5% |
| Sensitivity | 55.72 pg/mL |
| Range | 187.5 pg/mL - 12000 pg/mL |
| Sample Type | Cell Lysate |
| Recovery | Cell Lysate-109-107% - 112% |
| Key Features | One-wash 90 minute protocol; Sensitivity: 55.72 pg/mL; Range: 187.5 pg/mL - 12000 pg/mL; Sample type: Cell Lysate; Detection method: Colorimetric; Assay type: Sandwich (quantitative); Reacts with: Human |
Target Information
| Target Symbol | SMAD3 |
|---|---|
| UniProt ID | P84022 |
| Biomarker of SCs/CSCs | Luminal A Breast Cancer |
| Function | Receptor-regulated SMAD (R-SMAD) that is an intracellular signal transducer and transcriptional modulator activated by TGF-beta (transforming growth factor) and activin type 1 receptor kinases. Binds the TRE element in the promoter region of many genes that are regulated by TGF-beta and, on formation of the SMAD3/SMAD4 complex, activates transcription. Also can form a SMAD3/SMAD4/JUN/FOS complex at the AP-1/SMAD site to regulate TGF-beta-mediated transcription. Has an inhibitory effect on wound healing probably by modulating both growth and migration of primary keratinocytes and by altering the TGF-mediated chemotaxis of monocytes. This effect on wound healing appears to be hormone-sensitive. Regulator of chondrogenesis and osteogenesis and inhibits early healing of bone fractures. Positively regulates PDPK1 kinase activity by stimulating its dissociation from the 14-3-3 protein YWHAQ which acts as a negative regulator. |
| Cellular Localization | Cytoplasm. Nucleus. Cytoplasmic and nuclear in the absence of TGF-beta. On TGF-beta stimulation, migrates to the nucleus when complexed with SMAD4. Through the action of the phosphatase PPM1A, released from the SMAD2/SMAD4 complex, and exported out of the nucleus by interaction with RANBP1. Co-localizes with LEMD3 at the nucleus inner membrane. MAPK-mediated phosphorylation appears to have no effect on nuclear import. PDPK1 prevents its nuclear translocation in response to TGF-beta. |
| Domain | The MH1 domain is required for DNA binding. Also binds zinc ions which are necessary for the DNA binding.The MH2 domain is required for both homomeric and heteromeric interactions and for transcriptional regulation. Sufficient for nuclear import.The linker region is required for the TGFbeta-mediated transcriptional activity and acts synergistically with the MH2 domain. |
| Post-transcriptional Modifications | Phosphorylated on serine and threonine residues. Enhanced phosphorylation in the linker region on Thr-179, Ser-204 and Ser-208 on EGF and TGF-beta treatment. Ser-208 is the main site of MAPK-mediated phosphorylation. CDK-mediated phosphorylation occurs in a cell-cycle dependent manner and inhibits both the transcriptional activity and antiproliferative functions of SMAD3. This phosphorylation is inhibited by flavopiridol. Maximum phosphorylation at the G(1)/S junction. Also phosphorylated on serine residues in the C-terminal SXS motif by TGFBR1 and ACVR1. TGFBR1-mediated phosphorylation at these C-terminal sites is required for interaction with SMAD4, nuclear location and transactivational activity, and appears to be a prerequisite for the TGF-beta mediated phosphorylation in the linker region. Dephosphorylated in the C-terminal SXS motif by PPM1A. This dephosphorylation disrupts the interaction with SMAD4, promotes nuclear export and terminates TGF-beta-mediated signaling. Phosphorylation at Ser-418 by CSNK1G2/CK1 promotes ligand-dependent ubiquitination and subsequent proteasome degradation, thus inhibiting SMAD3-mediated TGF-beta responses. Phosphorylated by PDPK1.Acetylation in the nucleus by EP300 in the MH2 domain regulates positively its transcriptional activity and is enhanced by TGF-beta.Ubiquitinated. Monoubiquitinated, leading to prevent DNA-binding. Deubiquitination by USP15 alleviates inhibition and promotes activation of TGF-beta target genes.Poly-ADP-ribosylated by PARP1 and PARP2. ADP-ribosylation negatively regulates SMAD3 transcriptional responses during the course of TGF-beta signaling. |
| Involvement in Disease | Colorectal cancerLoeys-Dietz syndrome 3 |
Storage & Shipping
| Storage | Store at 2-8°C |
|---|---|
| Shipping | Gel Packs |
| Stability | The stability of kit is determined by the loss rate of activity. The loss rate of this kit is less than 5% within the expiration date under appropriate storage condition. |
For research use only. Not for clinical use.
