Influence of human p16(INK4) and p21(CIP1) on the in vitro activity of recombinant Plasmodium falciparum cyclin-dependent protein kinases.


Journal Article

The regulatory mechanisms of most cyclin dependent protein kinases (CDKs) are well understood and are highly conserved in eukaryotes. CDKs from the malaria parasite, Plasmodium falciparum, appear to be regulated in a similar manner with regard to cyclin binding and phosphorylation. In order to further understand their regulatory mechanisms, we examined two classes of cyclin dependent kinase inhibitors (CDIs) to inhibit a panel of plasmodial CDKs. We find that Pfmrk and PfPK5 are inhibited by heterologous p21(CIP1) with varying degrees of inhibition. In contrast, PfPK6, a kinase with sequence features characteristic of both a CDK and MAP kinase, is unaffected by this CDI. Furthermore, the CDK4/6 specific CDI, p16(INK4), fails to inhibit these plasmodial CDKs. Taken together, these results suggest that plasmodial CDKs may be regulated by the binding of inhibitory proteins in vivo.

Full Text

Cited Authors

  • Li, Z; Le Roch, K; Geyer, JA; Woodard, CL; Prigge, ST; Koh, J; Doerig, C; Waters, NC

Published Date

  • November 16, 2001

Published In

Volume / Issue

  • 288 / 5

Start / End Page

  • 1207 - 1211

PubMed ID

  • 11700040

Pubmed Central ID

  • 11700040

International Standard Serial Number (ISSN)

  • 0006-291X

Digital Object Identifier (DOI)

  • 10.1006/bbrc.2001.5920


  • eng

Conference Location

  • United States