Key features and details
- Rabbit polyclonal to Smad3
- Suitable for: IHC-P
- Reacts with: Mouse, Human
- Isotype: IgG
Product nameAnti-Smad3 antibody
See all Smad3 primary antibodies
DescriptionRabbit polyclonal to Smad3
Tested applicationsSuitable for: IHC-Pmore details
Species reactivityReacts with: Mouse, Human
Predicted to work with: Rat
Synthetic peptide within Human Smad3 aa 150-250. The exact sequence is proprietary.
Database link: P84022
This product is FOR RESEARCH USE ONLY. For commercial use, please contact firstname.lastname@example.org.
Storage instructionsShipped at 4°C. Store at +4°C short term (1-2 weeks). Upon delivery aliquot. Store at -20°C. Avoid freeze / thaw cycle.
Storage bufferpH: 7.60
Preservative: 0.1% Sodium azide
Constituents: PBS, 1% BSA
Concentration information loading...
PurityImmunogen affinity purified
Purification notesThis antibody is affinity purified.
ChIP Related Products
Our Abpromise guarantee covers the use of ab28379 in the following tested applications.
The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.
|IHC-P||1/100. Perform heat mediated antigen retrieval via the pressure cooker method before commencing with IHC staining protocol.|
FunctionReceptor-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.
Involvement in diseaseColorectal cancer
Loeys-Dietz syndrome 3
Sequence similaritiesBelongs to the dwarfin/SMAD family.
Contains 1 MH1 (MAD homology 1) domain.
Contains 1 MH2 (MAD homology 2) domain.
DomainThe 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.
modificationsPhosphorylated 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.
Cellular localizationCytoplasm. Nucleus. Cytoplasmic and nuclear in the absence of TGF-beta. On TGF-beta stimulation, migrates to the nucleus when complexed with SMAD4 (PubMed:15799969). Through the action of the phosphatase PPM1A, released from the SMAD2/SMAD4 complex, and exported out of the nucleus by interaction with RANBP1 (PubMed:16751101, PubMed:19289081). Co-localizes with LEMD3 at the nucleus inner membrane (PubMed:15601644). MAPK-mediated phosphorylation appears to have no effect on nuclear import (PubMed:19218245). PDPK1 prevents its nuclear translocation in response to TGF-beta (PubMed:17327236).
- Information by UniProt
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ab28379 has been referenced in 135 publications.
- Chen T et al. PAK4 phosphorylates fumarase and blocks TGF-ß-induced cell growth arrest in lung cancer cells. Cancer Res N/A:N/A (2019). PubMed: 30683654
- Naciri I et al. Genetic screens reveal mechanisms for the transcriptional regulation of tissue-specific genes in normal cells and tumors. Nucleic Acids Res 47:3407-3421 (2019). PubMed: 30753595
- Nakayama Y et al. C/EBPß and YY1 bind and interact with Smad3 to modulate lipopolysaccharide-induced amelotin gene transcription in mouse gingival epithelial cells. FEBS Open Bio 9:276-290 (2019). PubMed: 30761253
- Kolliopoulos C et al. Transforming growth factor ß (TGFß) induces NUAK kinase expression to fine-tune its signaling output. J Biol Chem 294:4119-4136 (2019). PubMed: 30622137
- Li Z et al. A non-autonomous role of MKL1 in the activation of hepatic stellate cells. Biochim Biophys Acta Gene Regul Mech 1862:609-618 (2019). PubMed: 30951901