|Reactivity||Human, Mouse, Rat|
|Calculated MW||86196 Da|
|Other Names||E3 ubiquitin-protein ligase SMURF2, hSMURF2, 632-, SMAD ubiquitination regulatory factor 2, SMAD-specific E3 ubiquitin-protein ligase 2, SMURF2|
|Target/Specificity||A synthetic peptide corresponding to residues in human Smurf2 was used as immunogen.|
|Format||50 mM Tris-Glycine (pH 7.4), 0.15 M NaCl, 40% Glycerol, 0.01% sodium azide and 0.05% BSA.|
|Storage||Maintain refrigerated at 2-8°C for up to 6 months. For long term storage store at -20°C in small aliquots to prevent freeze-thaw cycles.|
|Precautions||Smurf2 Antibody is for research use only and not for use in diagnostic or therapeutic procedures.|
|Function||E3 ubiquitin-protein ligase which accepts ubiquitin from an E2 ubiquitin-conjugating enzyme in the form of a thioester and then directly transfers the ubiquitin to targeted substrates. Interacts with SMAD1 and SMAD7 in order to trigger their ubiquitination and proteasome-dependent degradation. In addition, interaction with SMAD7 activates autocatalytic degradation, which is prevented by interaction with SCYE1. Forms a stable complex with the TGF-beta receptor-mediated phosphorylated SMAD2 and SMAD3. In this way, SMAD2 may recruit substrates, such as SNON, for ubiquitin-mediated degradation. Enhances the inhibitory activity of SMAD7 and reduces the transcriptional activity of SMAD2. Coexpression of SMURF2 with SMAD1 results in considerable decrease in steady-state level of SMAD1 protein and a smaller decrease of SMAD2 level.|
|Cellular Location||Nucleus. Cytoplasm. Cell membrane. Membrane raft. Note=Cytoplasmic in the presence of SMAD7. Colocalizes with CAV1, SMAD7 and TGF-beta receptor in membrane rafts|
|Tissue Location||Widely expressed.|
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Provided below are standard protocols that you may find useful for product applications.
Smad ubiquitination regulatory factor proteins (Smurf1 and Smurf2) are E3 ubiquitin ligase that belongs to the Hect family. Smurf proteins play an important role as regulators in TGF-beta pathway by ubiquitinating Smads and Smads associated proteins for proteasome degradation (1). Specifically, Smurf1 interacts with Smad1 and Smad5 for degradation, while Smurf2 ubiquitinates Smad1 and Smad2. Smads also functions to recruit Smurfs to various pathway components such as TGF-beta and SnoN. In particular, Smad7 acts as an adaptor protein between Smurfs and TGF-Beta receptors, allowing the receptors to be marked by Smurfs for degradation (2). Smurf2 interacts with all members of Smad family except for Smad4 and it is expressed various tissues and cell lines, such as placenta and ovarian cancer cell lines. Smurf2 has been implicated in the tumor formation and diseases progression (3).
1. Hershko A, Ciechanover A, Annu. Rev. Biochem. 67, 425-479. 1988.
2. Ebisawa T et al. J. Biol. Chem. 276:12477
3. Cai Y et al. Chin J Dig Dis. 7(4):237-45, 2006.
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