Protein kinase D isozymes activation and localization during mitosis

Romeo Papazyan, Michael Doche, Richard T. Waldron, Enrique Rozengurt, Mary Pat Moyer, Osvaldo Rey

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


The protein kinase D (PKD) family consists of three serine/threonine protein kinases involved in the regulation of fundamental biological processes in response to their activation and intracellular redistribution. Although a substantial amount of information is available describing the mechanisms regulating the activation and intracellular distribution of the PKD isozymes during interphase, nothing is known of their activation status, localization and role during mitosis. The results presented in this study indicate that during mitosis, PKD3 and PKD are phosphorylated at Ser731 and Ser744 within their activation loop by a mechanism that requires protein kinase C. Mitosis-associated PKD3 Ser731 and PKD Ser744 phosphorylation is related to the catalytic activation of these kinases as evidenced by in vivo phosphorylation of histone deacetylase 5, a substrate of PKD and PKD3. Activation loop-phosphorylated PKD3 and PKD, as well as PKD2, associate with centrosomes, spindles and midbody suggesting that these activated kinases establish dynamic interactions with the mitotic apparatus. Thus, this study reveals a connection between the PKD isozymes and cell division, suggesting a novel role for this family of serine/threonine kinases.

Original languageEnglish (US)
Pages (from-to)3057-3068
Number of pages12
JournalExperimental Cell Research
Issue number16
StatePublished - Oct 1 2008
Externally publishedYes


  • Centrosomes
  • GPCR
  • HDAC5
  • Mitosis
  • PKC
  • PKD
  • PKD2
  • PKD3
  • Spindles

ASJC Scopus subject areas

  • Cell Biology


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