Role of the protein tyrosine kinase Syk in regulating cell-cell adhesion and motility in breast cancer cells
X Zhang, U Shrikhande, BM Alicie, Q Zhou… - Molecular Cancer …, 2009 - AACR
X Zhang, U Shrikhande, BM Alicie, Q Zhou, RL Geahlen
Molecular Cancer Research, 2009•AACRThe expression of the Syk protein tyrosine kinase in breast cancer cells is inversely
correlated with invasive growth and metastasis. The expression of Syk inhibits cell motility
while supporting the formation of cell clusters by enhancing cell-cell contacts and promoting
the redistribution of the adhesion proteins cortactin and vinculin to these contacts. Syk
associates physically with cortactin and catalyzes its phosphorylation on tyrosine. The
clustering of integrins leads to the phosphorylation of Syk and of numerous cellular proteins …
correlated with invasive growth and metastasis. The expression of Syk inhibits cell motility
while supporting the formation of cell clusters by enhancing cell-cell contacts and promoting
the redistribution of the adhesion proteins cortactin and vinculin to these contacts. Syk
associates physically with cortactin and catalyzes its phosphorylation on tyrosine. The
clustering of integrins leads to the phosphorylation of Syk and of numerous cellular proteins …
Abstract
The expression of the Syk protein tyrosine kinase in breast cancer cells is inversely correlated with invasive growth and metastasis. The expression of Syk inhibits cell motility while supporting the formation of cell clusters by enhancing cell-cell contacts and promoting the redistribution of the adhesion proteins cortactin and vinculin to these contacts. Syk associates physically with cortactin and catalyzes its phosphorylation on tyrosine. The clustering of integrins leads to the phosphorylation of Syk and of numerous cellular proteins in a manner dependent on the activity of the kinase and on the presence of tyrosine 342 located in the linker B region. The ability of Syk to participate in integrin-mediated protein tyrosine phosphorylation correlates well with its ability to inhibit cell motility. (Mol Cancer Res 2009;7(5):634–44)
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