Phosphoproteomics reveals malaria parasite Protein Kinase G as a signalling hub regulating egress and invasion.

ABSTRACT: Our understanding of the key phosphorylation-dependent signalling pathways in the human malaria parasite, Plasmodium falciparum, remains rudimentary. Here we address this issue for the essential cGMP-dependent protein kinase, PfPKG. By employing chemical and genetic tools in combination with quantitative global phosphoproteomics, we identify the phosphorylation sites on 69 proteins that are direct or indirect cellular targets for PfPKG. These PfPKG targets include proteins involved in cell signalling, proteolysis, gene regulation, protein export and ion and protein transport, indicating that cGMP/PfPKG acts as a signalling hub that plays a central role in a number of core parasite processes. We also show that PfPKG activity is required for parasite invasion. This correlates with the findin

SUBMITTER: Alam MM 

PROVIDER: S-EPMC4507021 | biostudies-literature | 2015 Jul

REPOSITORIES: biostudies-literature