Catalog # CP3451

α1-Catenin (Tyr-148), phospho-specific Antibody

Rabbit Polyclonal

Application / Dilution

Size 100 μl

Species Reactivity Hu, Rt, Ms, Ck

MW 102 kDa



α-catenins are cadherin interacting proteins with homology to vinculin. Three α-catenin genes have been described including α1-catenin (αE-Catenin), α2-catenin (αN-catenin), and α3-catenin (αT-catenin). α1-catenin has 81% homology with α2-catenin and 60% homology with α3-catenin. These α-catenin isoforms may have similar roles since each binds cadherins. However, their expression patterns are both overlapping and distinct. α1-catenin was identified in epithelial cells, and is expressed in various cell types. α2-catenin is enriched in the nervous system, and α3-catenin is expressed highest in testis and heart. Phosphorylation may regulate the activity of α1-catenin, since tyrosine phosphorylation of Tyr-148 occurs during intercellular adhesion. This site is dephosphorylated by SHP2, which inhibits α1-catenin binding to β-catenin and translocation to the plasma membrane. Phosphorylation of α1-catenin at Tyr-148 may be important for inhibition of cell transformation, and dephosphorylation of this site may be important during SHP2-mediated cell transformation.



Burks, J. & Agazie, Y.M. (2006) Oncogene 25:7166.
Janssens, B. et al. (2001) J Cell Sci. 114(17):3177.
Hirano, S. et al. (1992) Cell. 70(2):293.
Herrenknecht, K. et al. (1991) Proc Natl Acad Sci U S A. 88(20):9156.

Western blot analysis of rat PC12 cells treated with pervanadate (1 mM) for 30 min (lanes 1, 3, & 5) then the blot was treated with alkaline phosphatase (lanes 2, 4, & 6). The blot was probed with anti-α-Catenin monoclonal (lanes 1 & 2), anti-α1-Catenin (Tyr-148) phospho-specific (lanes 3 & 4), or anti-α1-Catenin (a.a. 143-153) (lanes 5 & 6).

Phospho-α1-Catenin (Tyr-148) synthetic peptide (coupled to KLH) corresponding to amino acid residues around tyrosine 148 in human α1-Catenin. This peptide sequence is highly conserved in rat and mouse α1-Catenin, but is not conserved in α2-Catenin or α3-Catenin.

*For more information, see UniProt Accession P35221
Rabbit polyclonal, affinity-purified antibody is supplied in 100µl phosphate-buffered saline, 50% glycerol, 1 mg/ml BSA, and 0.05% sodium azide. Store at –20°C. Stable for 1 year.

The products are are safely shipped at ambient temperature for both domestic and international shipments. Each product is guaranteed to match the specifications as indicated on the corresponding technical data sheet. Please store at -20C upon arrival for long term storage.

This antibody was cross-adsorbed to unrelated phospho-tyrosine peptide before affinity purification using phospho-α1-Catenin (Tyr-148) peptide (without carrier). The antibody detects a 102 kDa* protein corresponding to the molecular mass of α1-Catenin on SDS-PAGE immunoblots of rat PC12 cells treated with pervanadate.

*All molecular weights (MW) are confirmed by comparison to Bio-Rad Rainbow Markers and to western blot mobilities of known proteins with similar MW.

This kit contains: