Cell Signaling Technology

Product Pathways - TGF-beta/Smad Signaling

Phospho-Smad1 (Ser206) (D40B7) Rabbit mAb #5753

Applications Reactivity Sensitivity MW (kDa) Isotype
W IP H (M) (R) (Mk) Endogenous 60 Rabbit IgG

Applications Key:  W=Western Blotting  IP=Immunoprecipitation
Reactivity Key:  H=Human  M=Mouse  R=Rat  Mk=Monkey
Species cross-reactivity is determined by western blot. Species enclosed in parentheses are predicted to react based on 100% sequence homology.

Protocols

Specificity / Sensitivity

Phospho-Smad1 (Ser206) (D40B7) Rabbit mAb recognizes endogenous levels of Smad1 protein only when phosphorylated at Ser206.

Source / Purification

Monoclonal antibody is produced by immunizing animals with a synthetic phosphopeptide corresponding to residues surrounding Ser206 of human Smad1 protein.

Western Blotting

Western Blotting

Western blot analysis of extracts of HeLa cells, untreated or UV-treated (60 mJ/cm2 for 2 minutes followed by 1.5 hour recovery), using Phospho-Smad1 (Ser206) (D40B7) Rabbit mAb (upper) and Smad1 Antibody #9743 (lower).

Western Blotting

Western Blotting

Western blot analysis of extracts from HT-1080 cells, untreated or treated with TPA #4174 (200 nM for 30 minutes), using Phospho-Smad1 (Ser206) (D40B7) Rabbit mAb (upper) and Smad1 Antibody #9743 (lower).

Background

Bone morphogenetic proteins (BMPs) constitute a large family of signaling molecules that regulate a wide range of critical processes including morphogenesis, cell-fate determination, proliferation, differentiation, and apoptosis (1,2). BMP receptors are members of the TGF-β family of Ser/Thr kinase receptors. Ligand binding induces multimerization, autophosphorylation, and activation of these receptors (3-5). They subsequently phosphorylate Smad1 at Ser463 and Ser465 in the carboxy-terminal motif SSXS, as well as Smad5 and Smad8 at their corresponding sites. These phosphorylated Smads dimerize with the coactivating Smad4 and translocate to the nucleus, where they stimulate transcription of target genes (5).MAP kinases and CDKs 8 and 9 phosphorylate residues in the linker region of Smad1, including Ser206. The phosphorylation of Ser206 recruits Smurf1 to the linker region and leads to the degradation of Smad1 (6). Phosphorylation of this site also promotes Smad1 transcriptional action by recruiting YAP to the linker region (7).

  1. Hogan, B.L. et al. (1996) Genes Dev. 10, 1580-1594.
  2. Hoodless, P.A. et al. (1996) Cell 85, 489-500.
  3. Klemm, J.D. et al. (1998) Annu. Rev. Immunol. 16, 569-592.
  4. Kretzschmar, M. et al. (1997) Genes Dev. 11, 984-995.
  5. Whitman, M. (1998) Genes Dev. 12, 2445-2462.
  6. Sapkota, G. et al. (2007) Mol Cell 25, 441-54.
  7. Alarcón, C. et al. (2009) Cell 139, 757-69.

Application References

Have you published research involving the use of our products? If so we'd love to hear about it. Please let us know!

Companion Products

For Research Use Only. Not For Use In Diagnostic Procedures.

Products