Cell Signaling Technology

Product Pathways - TGF-beta/Smad Signaling

Phospho-Smad1 (Ser206) Antibody #9553

smad   smad1  

No. Size Price
9553S 100 µl ( 10 western blots ) ¥3,900.00 现货查询 购买询价
9553 carrier free & custom formulation / quantityemail request
Applications Dilution Species-Reactivity Sensitivity MW (kDa) Isotype
W 1:1000 Human, Endogenous 60 Rabbit
IP 1:25

Species cross-reactivity is determined by western blot.

Applications Key: W=Western Blotting, IP=Immunoprecipitation,


Species predicted to react based on 100% sequence homology: Mouse, Rat, Monkey,

Specificity / Sensitivity

Phospho-Smad1 (Ser206) Antibody detects endogenous levels of Smad1 only when phosphorylated at Ser206. No cross reactivity was detected with other famly members.

Phospho-Smad1 (Ser206)抗体仅能识别206位丝氨酸磷酸化的内源性Smad1蛋白。此抗体与家族内其他蛋白没有交叉反应。

Source / Purification

Polyclonal antibodies are produced by immunizing animals with a synthetic phosphopeptide corresponding to residues surrounding Ser206 of Smad1. Antibodies were purified by protein A and peptide affinity chromatography.

合成对应Smad1 蛋白的邻近206位苏氨酸的氨基酸残基序列一致的磷酸化肽段,免疫动物获得多克隆抗体。抗体通过蛋白A和肽亲和层析纯化。

Western Blotting

Western Blotting

Western blot analysis of ACHN and HeLa cells, untreated or UV-treated, using Phospho-Smad1 (Ser206) Antibody (upper), or total Smad1 Antibody #9743 (lower).

使用Phospho-Smad1 (Ser206) 抗体(上),或total Smad1抗体#9743 (下)对未处理或经过UV处理的ACHN和HeLa细胞进行western blot分析。


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).

骨形成蛋白由一大类信号分子组成,这些分子调控包括形态发生、细胞命运定向、增殖、分化以及凋亡在内的广泛重要过程[1,2]。BMP 受体为TGF-β家族丝氨酸/苏氨酸受体成员。配基的结合诱导多聚化、自磷酸化和相应受体的激活[3-5]。它们随后磷酸化Smad1蛋白的C-末端SSXS模体中的463位丝氨酸和465位丝氨酸,且磷酸化Smad5和Smad8中相应的位置。这些磷酸化的Smad与共激活的Smad4形成二聚体,转移到核内激活靶基因的转录[5]。促分裂原活化蛋白激酶MAPK和周期蛋白依赖性蛋白激酶8和9在Smad1的连接区域磷酸化相应残基包括丝氨酸206。进而募集Smurf1到接头区域导致Smad1的降解[6]。这一位点的磷酸化也招募YAP到接头区域促进Smad1的转录激活[7]。

MAPKs phosphorylate the linker region of Smad1, including Ser206, and inhibit Smad1 activity through cytoplasmic retention and degradation (6).


  1. Hogan, B.L. (1996) Genes Dev 10, 1580-94.
  2. Hoodless, P.A. et al. (1996) Cell 85, 489-500.
  3. Klemm, J.D. et al. (1998) Annu Rev Immunol 16, 569-92.
  4. Kretzschmar, M. et al. (1997) Genes Dev 11, 984-95.
  5. Whitman, M. (1998) Genes Dev 12, 2445-62.
  6. Sapkota, G. et al. (2007) Mol Cell 25, 441-54.
  7. Alarcón, C. et al. (2009) Cell 139, 757-69.
  8. Sapkota, G. et al. (2007) Mol. Cell 25, 441-454.

Application References

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