Cell Signaling Technology

Product Pathways - Cytoskeletal Signaling

MCF2/Dbl Antibody #2089

Applications Reactivity MW (kDa) Source
W H M R 100 Rabbit

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

Specificity / Sensitivity

MCF2/Dbl Antibody recognizes endogenous levels of total MCF2/Dbl protein. Based on amino acid sequence homology, the antibody is expected to recognize splice variants 1-4 of human MCF2/Dbl. The antibody is not expected to recognize the onco-Dbl protein formed through amino-terminal truncation.

Source / Purification

Polyclonal antibodies are produced by immunizing rabbits with a synthetic peptide (KLH-coupled) corresponding to the amino terminus of human MCF2/Dbl. Antibodies are purified using protein A and peptide affinity chromatography.

Western Blotting

Western Blotting

Western blot analysis of extracts from various cell types using MCF2/Dbl Antibody.

Background

The MCF2/Dbl proto-oncogene product is the founding member of the Dbl family of Rho guanine nucleotide exchange factors (GEFs) that are characterized by their Dbl homology (DH) domain (1). GEFs stimulate the formation of the active, GTP-bound form of small GTPases such as Rho, Rac and Cdc42, signaling to various downstream molecules and regulating diverse cell functions. While the overexpressed, full-length Dbl gene has transforming activity (2), mutations resulting in truncated Dbl cause the protein to become highly oncogenic. This truncated form of Dbl, which lacks the amino-terminal 497 amino acids, has constitutive GEF activity (3) and is more stable than the full-length variant (4), allowing for increased signaling to downstream effector molecules.Dbl interacts with ezrin, a member of the ezrin/radixin/moesin (ERM) family of proteins that links the plasma membrane to the actin cytoskeleton. Dbl interacts with ezrin in lipid microdomains, which leads to Cdc42 activation and the regulation of processes such as filopodia formation and cell polarity (5,6). Dbl localization and biological activities are regulated in part by phosphatidylinositol 3-kinase (PI3K) (7). Dbl is also involved in cell survival and inhibits apoptosis through induction of Akt phosphorylation at Thr308 (8).

  1. Zheng, Y. (2001) Trends Biochem Sci 26, 724-32.
  2. Ron, D. et al. (1988) EMBO J 7, 2465-73.
  3. Hart, M.J. et al. (1991) Nature 354, 311-4.
  4. Kamynina, E. et al. (2007) Mol Cell Biol 27, 1809-22.
  5. Batchelor, C.L. et al. (2007) Cell Cycle 6, 353-63.
  6. Prag, S. et al. (2007) Mol Biol Cell 18, 2935-48.
  7. Vanni, C. et al. (2006) Cell Cycle 5, 2657-65.
  8. Morley, S. et al. (2007) Cell Signal 19, 211-8.

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