Background: PCTK3 is an uncharacterized serine/threonine kinase that belongs to the cyclin-dependent kinase family. Results: The activity of PCTK3 is increased via interaction with cyclin A2 and phosphorylation by PKA. PCTK3 knockdown induces actin polymerization. Conclusion: PCTK3 is activated by cyclin A2 and PKA and is involved in actin dynamics. Significance: This study provides clues to the physiological function of PCTK3.
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