beta-Catenin [p Ser33] Antibody (BC-76)

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Product Details

Summary
Reactivity HuSpecies Glossary
Applications WB, ELISA
Clone
BC-76
Clonality
Monoclonal
Host
Mouse
Conjugate
Unconjugated
Concentration
1.0 mg/ml

Order Details

beta-Catenin [p Ser33] Antibody (BC-76) Summary

Immunogen
Synthetic peptide, corresponding to amino acids 32-45 of Human beta Catenin, phosphorylated at Ser33.
Modification
p Ser33
Localization
Cytoplasmic when it is unstabilized (high level of phosphorylation) or bound to CDH1. Translocates to the nucleus when it is stabilized (low level of phosphorylation).
Marker
Epithelial Cell Marker, Adherens Junction Marker
Specificity
Monoclonal Anti-Phospho-beta-Catenin (pSer33) recognizes human beta-Catenin phosphorylated at Ser33.
Isotype
IgM
Clonality
Monoclonal
Host
Mouse
Gene
CTNNB1
Purity
IgM purified
Innovator's Reward
Test in a species/application not listed above to receive a full credit towards a future purchase.

Applications/Dilutions

Dilutions
  • Western Blot 5 ug/ml
  • ELISA 5 ug/ml
Application Notes
WB:Detects a band of approximately 94 kDa. Not tested in other applications. Optimal dilutions should be determined by the end user.
Positive Control
293 Lysate (NB800-PC6)
beta-Catenin Lysate (NBL1-09577)

Reactivity Notes

Cross-reacts with Human. Not yet tested in other species.

Packaging, Storage & Formulations

Storage
Store at 4C short term. Aliquot and store at -20C long term. Avoid freeze-thaw cycles.
Buffer
10mM PBS (pH 7.4) and 1.0% BSA
Preservative
15mM Sodium Azide
Concentration
1.0 mg/ml
Purity
IgM purified

Alternate Names for beta-Catenin [p Ser33] Antibody (BC-76)

  • bCatenin
  • beta 1 (88kD)
  • beta-Catenin
  • catenin (cadherin-associated protein), beta 1, 88kDa
  • catenin beta-1
  • CTNNB
  • CTNNB1
  • DKFZp686D02253
  • FLJ25606
  • FLJ37923

Background

Cell adhesion is important during development, as well as in sorting of cells, induction of cellular morphogenesis and maintenance of tissue integrity.1-3 Ca2+-dependent adhesion of cells involves a multifunctional family of transmembrane glycoproteins termed cadherins that regulate homophilic interactions in cells. These interactions initiate a cascade of events that leads to the structural and functional reorganizations of cells. Cadherins function is mediated by both specific binding of extracellular domains at the cell surface and interaction with components of the cytoplasm. These components include alpha-, beta- and gamma-catenin (plakoglobin) that bind to the cytoplasmic domain of cadherins.4 Beta-catenin (92-97 kDa) shares 70% sequence identity to a protein encoded by Drosophila armadillo, a segment polarity gene.5-8 Beta-catenin binds to a diverse set of proteins including the presenilins, epidermal growth factor receptor (EGF-R), the actin-binding protein fascin and the transcription factor Teashirt.9-10 Beta-catenin is composed of a series of proteinprotein interaction motifs that allow it to function as a scaffold. The N-terminus domain, containing the binding site for alpha-catenin and the phosphorylation sites, is recognized by GSK3Beta. The C-terminus contains the transcriptional activation domain and the binding site for Teashirt.9-10 Beta-catenin translocates into the nucleus, where it complexes with transcription factors of the LEF-1 family and thus regulates the expression of specific genes. By playing such a dual function, i.e. a structural role in cell junctions and a regulatory role in the nucleus, beta-catenin can transduce changes in cell adhesion and junction formation to control transmembrane signaling and gene expression.1, 11 Beta-catenin-mediated signaling depends on its accumulation and subsequent translocation into the nucleus. The level of beta-catenin is regulated by its association with the tumor suppressor molecule Adenomatous Polyposis Coli (APC), axin, and GSK3Beta. In this complex, GSK3Beta phosphorylates beta-catenin at multiple serine or threonine residues present in the amino terminal region of beta-catenin,1 thereby marking beta-catenin for degradation by the proteasome pathway. The significance of beta-catenin phosphorylation for its stability is most clearly manifested in several types of human cancers. In cells expressing mutant APC, common in human colon cancer and melanoma, beta-catenin accumulates due to the failure of its degradation.1 Moreover, a single amino acid mutation at one of the four critical serine or threonine residues (Ser33, -37 and -45 and Thr-41) at the amino terminal region in the consensus GSK3Beta phosphorylation site, results in deregulated accumulation of beta-catenin and thereby increased signaling through the TCF/beta-catenin transcriptional complex, which contributes to tumorigenesis. Immunofluorescence studies indicate that phosphorylated beta-catenin accumulates in the nuclei of Madin-Darby Canine Kidney (MDCK) and BCAP (human breast cancer) cells and is transiently associated with adherens junctions.12 It was recently shown that phosphorylation of Ser45 and Thr41 precedes the phosphorylation of Ser33 and Ser37. Phosphorylation is mediated by casein kinase IAlph (CKIAlpha), an axin associated kinase.13 Monoclonal antibodies reacting specifically with beta-catenin phosphorylated at Ser33 are essential tools for defining the role of the phosphorylated form in the distributions, interactions, and regulation/deregulation of beta-catenin in signal transduction.

Limitations

This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.

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Product General Protocols

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Positive Control Lysate(s)

Secondary Antibodies

 

Isotype Controls

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Bioinformatics

Gene Symbol CTNNB1
Entrez