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• W1925759993 endingPage "2780" @default.
• W1925759993 startingPage "2771" @default.
• W1925759993 abstract "A novel phosphorylation-specific antibody (alphapbeta-catenin) was generated against a peptide corresponding to amino acids 33-45 of human beta-catenin, which contained phosphorylated serines at positions 33 and 37. This antibody is specific to phosphorylated beta-catenin and reacts neither with the non-phosphorylated protein nor with phosphorylated or non-phosphorylated plakoglobin. It weakly interacts with S33Y beta-catenin but not with the S37A mutant. pbeta-catenin is hardly detectable in normal cultured cells and accumulates (up to 55% of total beta-catenin) upon overexpression of the protein or after blocking its degradation by the proteasome. Inhibition of both GSK-3beta and the proteasome resulted in a rapid (t1/2=10 minutes) and reversible reduction in pbeta-catenin levels, suggesting that the protein can undergo dephosphorylation in live cells, at a rate comparable to its phosphorylation by GSK-3beta. pbeta-catenin interacts with LEF-1, but fails to form a ternary complex with DNA, suggesting that it is transcriptionally inactive. Immunofluorescence microscopy indicated that pbeta-catenin accumulates in the nuclei of MDCK and BCAP cells when overexpressed and is transiently associated with adherens junctions shortly after their formation. pbeta-catenin only weakly interacts with co-transfected N-cadherin, although it forms a complex with the ubiquitin ligase component beta-TrCP. SW480 colon cancer cells that express a truncated APC, at position 1338, contain high levels of pbeta-catenin, whereas HT29 cells, expressing APC truncated at position 1555, accumulate non-phosphorylated beta-catenin, suggesting that the 1338-1555 amino acid region of APC is involved in the differential regulation of the dephosphorylation and degradation of pbeta-catenin." @default.
• W1925759993 created "2016-06-24" @default.
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• W1925759993 date "2002-07-01" @default.
• W1925759993 modified "2023-10-15" @default.
• W1925759993 title "Regulation of S33/S37 phosphorylated β-catenin in normal and transformed cells" @default.
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• W1925759993 doi "https://doi.org/10.1242/jcs.115.13.2771" @default.
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