C-Src-mediated phosphorylation of δ-catenin increases its protein stability and the ability of inducing nuclear distribution of ß-catenin.
Biochim Biophys Acta
; 1843(4): 758-68, 2014 Apr.
Article
em En
| MEDLINE
| ID: mdl-24412473
ABSTRACT
Although δ-catenin was first considered as a brain specific protein, strong evidence of δ-catenin overexpression in various cancers, including prostate cancer, has been accumulated. Phosphorylation of δ-catenin by Akt and GSK3ß has been studied in various cell lines. However, tyrosine phosphorylation of δ-catenin in prostate cancer cells remains unknown. In the current study, we demonstrated that Src kinase itself phosphorylates δ-catenin on its tyrosine residues in prostate cancer cells and further illustrated that Y1073, Y1112 and Y1176 of δ-catenin are predominant sites responsible for tyrosine phosphorylation mediated by c-Src. Apart from c-Src, other Src family kinases, including Fgr, Fyn and Lyn, can also phosphorylate δ-catenin. We also found that c-Src-mediated Tyr-phosphorylation of δ-catenin increases its stability via decreasing its affinity to GSK3ß and enhances its ability of inducing nuclear distribution of ß-catenin through interrupting the integrity of the E-cadherin. Taken together, these results indicate that c-Src can enhance the oncogenic function of δ-catenin in prostate cancer cells.
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Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Neoplasias da Próstata
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Quinases da Família src
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Beta Catenina
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Cateninas
Limite:
Animals
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Humans
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Male
Idioma:
En
Ano de publicação:
2014
Tipo de documento:
Article