Abstract
Activated Ras has been found in many types of cancer. However, the mechanism underlying Ras-promoted tumor metastasis remains unclear. We demonstrate here that activated Ras induces tyrosine dephosphorylation and inhibition of FAK mediated by the Ras downstream Fgd1-Cdc42-PAK1-MEK-ERK signaling cascade. ERK phosphorylates FAK S910 and recruits PIN1 and PTP-PEST, which colocalize with FAK at the lamellipodia of migrating cells. PIN1 binding and prolyl isomerization of FAK cause PTP-PEST to interact with and dephosphorylate FAK Y397. Inhibition of FAK mediated by this signal relay promotes Ras-induced cell migration, invasion, and metastasis. These findings uncover the importance of sequential modification of FAK-by serine phosphorylation, isomerization, and tyrosine dephosphorylation--in the regulation of FAK activity and, thereby, in Ras-related tumor metastasis.
Publication types
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Research Support, N.I.H., Extramural
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Research Support, Non-U.S. Gov't
MeSH terms
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Animals
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Binding Sites
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Cell Line
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Cell Line, Tumor
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Cell Movement
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Focal Adhesion Protein-Tyrosine Kinases / genetics
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Focal Adhesion Protein-Tyrosine Kinases / metabolism*
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Humans
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Immunoblotting
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Mice
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Mice, Nude
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Mitogen-Activated Protein Kinases / genetics
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Mitogen-Activated Protein Kinases / metabolism*
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NIH 3T3 Cells
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NIMA-Interacting Peptidylprolyl Isomerase
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Neoplasm Metastasis
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Neoplasm Transplantation
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Neoplasms, Experimental / genetics
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Neoplasms, Experimental / metabolism
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Neoplasms, Experimental / pathology
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Peptidylprolyl Isomerase / genetics
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Peptidylprolyl Isomerase / metabolism*
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Phosphorylation
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Protein Binding
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Protein Tyrosine Phosphatase, Non-Receptor Type 12 / genetics
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Protein Tyrosine Phosphatase, Non-Receptor Type 12 / metabolism*
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Serine / metabolism
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Transfection
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Tyrosine / metabolism
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ras Proteins / genetics
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ras Proteins / metabolism*
Substances
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NIMA-Interacting Peptidylprolyl Isomerase
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Tyrosine
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Serine
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Focal Adhesion Protein-Tyrosine Kinases
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Mitogen-Activated Protein Kinases
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Protein Tyrosine Phosphatase, Non-Receptor Type 12
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ras Proteins
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PIN1 protein, human
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Peptidylprolyl Isomerase
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Pin1 protein, mouse