PCTK3/CDK18 regulates cell migration and adhesion by negatively modulating FAK activity.

Abstract:

:PCTAIRE kinase 3 (PCTK3) is a member of the cyclin dependent kinase family, but its physiological function remains unknown. We previously reported that PCTK3-knockdown HEK293T cells showed actin accumulation at the leading edge, suggesting that PCTK3 is involved in the regulation of actin reorganization. In this study, we investigated the physiological function and downstream signal transduction molecules of PCTK3. PCTK3 knockdown in HEK293T cells increased cell motility and RhoA/Rho-associated kinase activity as compared with control cells. We also found that phosphorylation at residue Tyr-397 in focal adhesion kinase (FAK) was increased in PCTK3-knockdown cells. FAK phosphorylation at Tyr-397 was increased in response to fibronectin stimulation, whereas its phosphorylation was suppressed by PCTK3. In addition, excessive expression of PCTK3 led to the formation of filopodia during the early stages of cell adhesion in HeLa cells. These results indicate that PCTK3 controls actin cytoskeleton dynamics by negatively regulating the FAK/Rho signaling pathway.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Matsuda S,Kawamoto K,Miyamoto K,Tsuji A,Yuasa K

doi

10.1038/srep45545

subject

Has Abstract

pub_date

2017-03-31 00:00:00

pages

45545

issn

2045-2322

pii

srep45545

journal_volume

7

pub_type

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