COG5

In Toxoplasma gondii tachyzoites, COG5 is a subunit of the conserved oligomeric Golgi (COG) complex, which is essential for protein transport and engages novel parasite-specific interacting partners critical for trafficking, indicating that T. gondii has broadened the role of conserved COG components to accommodate parasite-specific trafficking needs (PMID:37966241). Beyond this characterization of the COG complex at the complex level, no further mechanistic detail specific to COG5 has been characterized in the available corpus.

1. 2023 Medium

   Whether T. gondii possesses a functional COG complex and what role it plays was unknown; identifying and characterizing the complex established that COG (including COG5) is essential for protein transport and recruits novel parasite-specific partners, revealing a broadened, reinvented trafficking machinery.

   Evidence Identification and functional characterization of the COG complex in T. gondii tachyzoites using genetic and biochemical approaches

   PMID:37966241

   Open questions at the time

   • The specific molecular contribution of COG5 individually (versus the complex as a whole) is not resolved
   • The identity and binding mode of the novel COG-interacting partners are not detailed at the COG5 level
   • No structural or direct substrate/cargo information for COG5 is established