Storage instructionsShipped at 4°C. Store at -20°C. Stable for 12 months at -20°C.
Storage bufferpH: 7.40
Preservative: 0.02% Sodium azide
Constituents: 49% PBS, 50% Glycerol, 0.88% Sodium chloride
PBS without Mg2+ and Ca2+
Concentration information loading...
PurityImmunogen affinity purified
Our Abpromise guarantee covers the use of ab131550 in the following tested applications.
The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.
|WB||1/500 - 1/1000. Detects a band of approximately 55 kDa (predicted molecular weight: 52 kDa).|
|ICC/IF||1/100 - 1/200.|
FunctionTranscriptional modulator activated by BMP (bone morphogenetic proteins) type 1 receptor kinase. SMAD1 is a receptor-regulated SMAD (R-SMAD). SMAD1/OAZ1/PSMB4 complex mediates the degradation of the CREBBP/EP300 repressor SNIP1.
Tissue specificityUbiquitous. Highest expression seen in the heart and skeletal muscle.
Sequence similaritiesBelongs to the dwarfin/SMAD family.
Contains 1 MH1 (MAD homology 1) domain.
Contains 1 MH2 (MAD homology 2) domain.
modificationsPhosphorylated on serine by BMP type 1 receptor kinase.
Ubiquitin-mediated proteolysis by SMAD-specific E3 ubiquitin ligase SMURF1.
Cellular localizationCytoplasm. Nucleus. Cytoplasmic in the absence of ligand. Migrates to the nucleus when complexed with SMAD4. Co-localizes with LEMD3 at the nucleus inner membrane.
- Information by UniProt
- BSP-1 antibody
- BSP1 antibody
- HsMAD1 antibody
Immunofluorescent analysis of methanol-fixed HeLa cells labelling Smad1 with ab131550 at 1/100 dilution.
Anti-Smad1 antibody (ab131550) at 1/500 dilution + HeLa cell extract
Predicted band size: 52 kDa
Observed band size: 55 kDa why is the actual band size different from the predicted?