PathScan® RP Total SMAD4 Sandwich ELISA Kit #19518
Supporting Data
| REACTIVITY | H M R Mk |
Application Key:
- ELISA-ELISA
Species Cross-Reactivity Key:
- H-Human
- M-Mouse
- R-Rat
- Mk-Monkey
Product Information
Product Description
The rapid protocol (RP) PathScan® RP Total SMAD4 Sandwich ELISA Kit is a solid phase sandwich enzyme-linked immunosorbent assay (ELISA) that detects endogenous levels of SMAD4 protein in a reduced assay time of 1.5 hours. Incubation of cell lysates and detection antibody on the coated microwell plate forms a sandwich with SMAD4 in a single step. The plate is then extensively washed and TMB reagent is added for signal development. The magnitude of absorbance for the developed color is proportional to the quantity of SMAD4 protein. Learn more about your ELISA kit options here.
*Antibodies in this kit are custom formulations specific to kit.
Protocol
Specificity / Sensitivity
Species Reactivity:
Background
Members of the SMAD family of signal transduction molecules are components of a critical intracellular pathway that transmits TGF-β signals from the cell surface into the nucleus. Three distinct classes of SMADs have been defined: the receptor-regulated SMADs (R-SMADs), which include SMAD1, 2, 3, 5, 9; the common-mediator SMAD (co-SMAD), SMAD4; and the antagonistic or inhibitory SMADs (I-SMADs), SMAD6 and 7 (1-5). Activated type I receptors associate with specific R-SMADs and phosphorylate them on a conserved SSXS motif in the carboxy-terminus. Phosphorylated R-SMADS dissociate from the receptor and form a heteromeric complex with SMAD4, initiating translocation of the heteromeric SMAD complex to the nucleus. Once in the nucleus, SMADs recruit a variety of DNA binding proteins that function to regulate transcriptional activity (6-8).
- Heldin, C.H. et al. (1997) Nature 390, 465-71.
- Attisano, L. and Wrana, J.L. (1998) Curr Opin Cell Biol 10, 188-94.
- Derynck, R. et al. (1998) Cell 95, 737-40.
- Massagué, J. (1998) Annu Rev Biochem 67, 753-91.
- Whitman, M. (1998) Genes Dev 12, 2445-62.
- Wrana, J.L. (2000) Sci STKE 2000, re1.
- Attisano, L. and Wrana, J.L. (2002) Science 296, 1646-7.
- Moustakas, A. et al. (2001) J Cell Sci 114, 4359-69.
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