ATG12

PF3D7_1470000 (ATG12) is assigned to the ATG12–ATG5–ATG16 complex, which is described as an E3-like ligase that enables ATG8 membrane association (lipidation) in Plasmodium falciparum (PMID:42473197). This assignment derives from literature synthesis and mechanistic inference from conserved conjugation systems rather than from direct experimental characterization of ATG12 itself; no biochemical reconstitution, structural study, or genetic loss-of-function analysis of PF3D7_1470000 is present in the available corpus (PMID:42473197). In P. berghei, transcription of the ATG12 ortholog is upregulated by chloroquine and 5-fluorouracil and downregulated by tunicamycin, indicating its expression responds to drug-induced stress (PMID:38976068). Beyond this complex membership assignment and transcriptional responsiveness, no direct mechanistic detail about PF3D7_1470000 has been characterized in the available corpus.

1. 2024 Low

   To ask whether ATG12 expression participates in stress and drug-induced cell death responses, its transcript levels were measured under distinct chemical stressors, establishing that ATG12 is transcriptionally regulated rather than constitutive.

   Evidence RT-qPCR of autophagy-related transcripts in ex vivo P. berghei cultures treated with tunicamycin, 5-fluorouracil, and chloroquine

   PMID:38976068

   Open questions at the time

   • Transcriptional readout only; no protein-level or functional data for ATG12
   • Does not establish whether ATG12 protein abundance or activity changes with the transcript
   • Shown in P. berghei; not tested in P. falciparum
2. 2026 Low

   To place ATG12 in a pathway, it was assigned to the ATG12–ATG5–ATG16 E3-like ligase complex mediating ATG8 lipidation, framing its presumed molecular role in Plasmodium autophagy.

   Evidence Literature synthesis with mechanistic inference from conserved conjugation-system characterization in P. falciparum (review; no primary experiment on ATG12)

   PMID:42473197

   Open questions at the time

   • Assignment is inferred from conserved systems, not from direct experiments on PF3D7_1470000
   • No biochemical reconstitution of the ATG12–ATG5–ATG16 complex in Plasmodium
   • No demonstration that ATG12 itself is required for ATG8 lipidation

• Whether PF3D7_1470000 physically conjugates to ATG5, forms the E3-like complex, and is functionally required for ATG8 lipidation and parasite autophagy remains untested by direct experiment.
• No genetic knockout/knockdown of ATG12 reported
• No demonstration of ATG12–ATG5 conjugation in Plasmodium
• No structural model or interaction mapping for ATG12