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Methods to Study Mrp4-containing Macromolecular Complexes in the Regulation of Fibroblast Migration
Published on: May 19, 2016
PCTK3/CDK18 regulates cell migration and adhesion by negatively modulating FAK activity
Shinya Matsuda1, Kohei Kawamoto1, Kenji Miyamoto1
1Department of Biological Science and Technology, Tokushima University Graduate School, Minamijosanjima, Tokushima 770-8506, Japan.
Scientific Reports
|April 1, 2017
Summary
PCTAIRE kinase 3 (PCTK3) regulates cell movement and actin cytoskeleton dynamics. This study reveals PCTK3 negatively controls the FAK/Rho signaling pathway, impacting cell motility and actin reorganization.
Area of Science:
- Cell Biology
- Molecular Biology
- Biochemistry
Background:
- PCTAIRE kinase 3 (PCTK3), a cyclin-dependent kinase family member, has an unknown physiological function.
- Previous studies suggested PCTK3's involvement in actin reorganization.
- This study aimed to elucidate PCTK3's function and downstream signaling.
Purpose of the Study:
- Investigate the physiological role of PCTK3.
- Identify downstream signaling molecules regulated by PCTK3.
- Determine PCTK3's mechanism in controlling actin cytoskeleton dynamics.
Main Methods:
- PCTK3 knockdown in HEK293T cells.
- Analysis of cell motility and RhoA/Rho-associated kinase activity.
- Western blot analysis of focal adhesion kinase (FAK) phosphorylation at Tyr-397.
- Observation of filopodia formation in HeLa cells with excessive PCTK3 expression.
Main Results:
- PCTK3 knockdown increased cell motility and RhoA/Rho-associated kinase activity.
- Phosphorylation of FAK at Tyr-397 was elevated in PCTK3-knockdown cells.
- PCTK3 suppressed FAK phosphorylation at Tyr-397, while fibronectin stimulation increased it.
- Excessive PCTK3 expression induced filopodia formation during early cell adhesion.
Conclusions:
- PCTK3 negatively regulates the FAK/Rho signaling pathway.
- PCTK3 plays a crucial role in controlling actin cytoskeleton dynamics.
- PCTK3 influences cell motility and adhesion-related structures like filopodia.
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