Cell Signaling Technology

Product Pathways - MAPK Signaling

Phospho-ASK1 (Thr845) Antibody #3765

apoptosis signal-regulating kinase 1   ask   ask-1   MAP3K5   MAPKKK5   MEK kinase-5  

No. Size Price
3765S 100 µl ( 10 western blots ) ¥4,050.00 现货查询 购买询价 防伪查询
3765 carrier free & custom formulation / quantityemail request
Applications Dilution Species-Reactivity Sensitivity MW (kDa) Isotype
W 1:1000 Human, Transfected Only 155 Rabbit

Species cross-reactivity is determined by western blot.

Applications Key: W=Western Blotting,


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

Specificity / Sensitivity

Phospho-ASK1 (Thr845) Antibody detects transfected ASK1 only when phosphorylated at threonine 845.

Phospho-ASK1 (Thr845) Antibody兔多抗能检测转染水平的Thr845位点磷酸化的ASK1蛋白。

Source / Purification

Polyclonal antibodies are produced by immunizing animals with a synthetic phosphopeptide corresponding to residues surrounding Thr845 of mouse ASK1. Antibodies are purified by protein A and peptide affinity chromatography.


Western Blotting

Western Blotting

Western blot analysis of extracts from HEK293 cells, untransfected (lane 1) or transfected with wild-type ASK1 (lane 2) or T845A mutant ASK1 (lane 3), using Phospho-ASK1 (Thr845) Antibody (upper) or ASK1 Antibody #3762 (lower). (Lysates were provided by Dr. Wang Min, Dept. of Pathology, Yale University, New Haven, CT).western blot方法检测细胞提取物:未转染的(1、4号条带)、转染过原株ASK1蛋白的(2号条带)、转染Ser83Ala 突变ASK1蛋白的(3号条带)HEK293细胞,使用的抗体是Phospho-ASK1 (Thr845) Antibody (上图) 和 ASK1 Antibody #3762 (下图)。

Western Blotting

Western Blotting

Western blot analysis of extracts from COS cells, untransfected (lane 1), or transfected with wild-type ASK1 (lanes 2,3), using Phospho-ASK1 (Thr845) Antibody (upper) or ASK1 Antibody #3762 (lower). In lane 3, the lysate was treated with lamda phosphatase to demonstrate phospho-specificity of Phospho-ASK1 (Thr845) Antibody.western blot方法检测细胞提取物:未转染的(1号条带)、转染过原株ASK1蛋白的(2、3号条带)COS细胞,使用的抗体是Phospho-ASK1 (Thr845) Antibody (上图) 和 ASK1 Antibody #3762 (下图)。3号条带中细胞裂解物用lamda 磷酸酶处理,以证明Phospho-ASK1 (Thr845) 抗体具有磷酸化特异性。


Apoptosis signal-regulating kinase 1 (ASK1), a MAP kinase kinase kinase, plays essential roles in stress-induced apoptosis (1,2). ASK1 is activated in response to a variety of stress-related stimuli through distinct mechanisms and activates MKK4 and MKK3, which in turn activate JNK and p38 (3). Overexpression of ASK1 activates JNK and p38 and induces apoptosis in several cell types through signals involving the mitochondrial cell death pathway. Embryonic fibroblasts or primary neurons derived from ASK1-/- mice are resistant to stress-induced JNK and p38 activation and cell death (4,5). Phosphorylation at Ser967 is essential for ASK1 association with 14-3-3 protein and suppression of cell death (6). Oxidative stress induces dephosphorylation of Ser967 and phosphorylation of Thr845 in the activation loop of ASK1, and both are correlated with ASK1 activity and ASK1-dependent apoptosis (7,8). On the other hand, Akt phosphorylates ASK1 at Ser83, which attenuates ASK1 activity and promotes cell survival (9).

凋亡信号调节激酶1(ASK1)是一种MAPKKK,在应激诱导的凋亡中起着关键的作用(1,2)。ASK1蛋白在多种应激相关的刺激因子作用下被激活,内在机制各不相同。ASK1蛋白能够活化MKK4、MKK3,进而激活JNK和p38蛋白(3)。ASK1蛋白的过度表达能激活JNK和p38蛋白,并通过涉及线粒体细胞死亡途径的信号而诱导多种细胞凋亡(4,5)。来源于ASK1-/- 小鼠的胚胎成纤维细胞或初级神经元细胞对应激诱导的JNK和p38蛋白活化和细胞死亡有拮抗作用。ASK1蛋白Ser967位点的磷酸化对其与14-3-3蛋白的结合和抑制细胞死亡十分重要(6)。氧化应激能够诱导ASK1蛋白Ser967位点的去磷酸化及活化环中的Thr845位点的磷酸化,这两个变化与ASK1蛋白活性和ASK1依赖型细胞凋亡相关(7,8)。另一方面,Akt蛋白能将ASK1蛋白Ser83位点磷酸化,从而减弱ASK1蛋白的活力并促进细胞存活(9)。

  1. Ichijo, H. et al. (1997) Science 275, 90-94.
  2. Wang, X.S. et al. (1996) J. Biol. Chem. 271, 31607-31611.
  3. Matsuzawa, A. and Ichijo, H. (2001) J. Biochem. (Tokyo) 130, 1-8.
  4. Tobiume, K. et al. (2001) EMBO Rep. 2, 222-228.
  5. Nishitoh, H. et al. (2002) Genes Dev. 16, 1345-1355.
  6. Zhang, L. et al. (1999) Proc. Natl. Acad. Sci. USA 96, 8511-8515.
  7. Tobiume, K. et al. (2002) J. Cell. Physiol. 191, 95-104.
  8. Goldman, E.H. et al. (2004) J. Biol. Chem. in press, .
  9. Kim, A.H. et al. (2001) Mol. Cell. Biol. 21, 893-901.

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