STX10

STX10 (TgStx10) is a SNARE protein assigned to the endosomal vesicular trafficking pathway in Toxoplasma gondii, where it localizes to the endosome-like compartment (ELC) (PMID:34340555). It resides at this compartment alongside TgStx12, consistent with a role in membrane trafficking through the endosomal system (PMID:34340555). Beyond this localization, the specific functional role of TgStx10 has not been resolved by loss-of-function experiments in the available corpus.

1. 2021 Medium

   To place an uncharacterized SNARE within the parasite's trafficking machinery, fluorescence localization mapped TgStx10 to the endosome-like compartment, establishing which membrane system it operates in.

   Evidence Fluorescence localization and subcellular fractionation of SNAREs across intracellular compartments in T. gondii

   PMID:34340555

   Open questions at the time

   • No loss-of-function test of TgStx10's specific role at the ELC
   • SNARE partners of TgStx10 not identified
   • No functional trafficking cargo assigned
2. 2021 Medium

   To situate TgStx10 relative to other endosomal SNAREs, co-localization placed it at the ELC alongside TgStx12, embedding it in the endosomal vesicular trafficking pathway.

   Evidence Conditional ablation and localization analysis of a panel of T. gondii SNARE proteins

   PMID:34340555

   Open questions at the time

   • TgStx10's own function not tested by conditional knockout in this study
   • Whether TgStx10 and TgStx12 form a functional SNARE complex is not established
   • Directionality of trafficking (in vs out of the ELC) unresolved

• The specific functional role of TgStx10 within the endosome-like compartment and its cognate SNARE-complex partners remain undefined.
• No loss-of-function phenotype for TgStx10
• SNARE-complex partners and fusion targets unidentified
• Contribution to parasite viability or trafficking flux unknown