PF3D7_1330500

PF3D7_1330500 is a CTLH domain-containing subunit of the PfGID E3 ubiquitin ligase complex in Plasmodium falciparum, where it contributes to a complex that governs gametocyte developmental progression (PMID:41986327). Genetic deletion of PfGID complex components, including this subunit, arrests gametocyte development and abolishes transmission to mosquitoes, establishing a role for the complex in the sexual cell-fate programme (PMID:41986327). Within this complex, the PfGID E3 ligase ubiquitinates the ZFP36-family RNA-binding protein GD1 and the cryptochrome-like protein PfDPL to fine-tune their protein levels (PMID:41986327). Beyond its membership in the PfGID complex and the shared loss-of-function phenotype, the individual biochemical contribution of PF3D7_1330500 — as distinct from other complex subunits — has not been separately characterized in the available corpus.

1. 2026 Medium

   It was unknown what cellular role PF3D7_1330500 plays; genetic deletion placed it as a functional component of the PfGID E3 ubiquitin ligase complex required for gametocyte development and mosquito transmission.

   Evidence Genetic deletion (loss-of-function) with phenotypic readout of gametocyte developmental arrest and loss of transmission, in the context of studying PfGID complex components

   PMID:41986327

   Open questions at the time

   • The abstract does not distinguish PF3D7_1330500's individual contribution from that of other PfGID subunits
   • No structural or biochemical assignment of a specific role within the complex for this subunit
   • Whether deletion of this subunit alone reproduces the phenotype is not resolved
2. 2026 Medium

   The substrates and downstream logic of the complex were unknown; identification of GD1 and PfDPL as ubiquitination targets linked the PfGID complex to control of gametocyte cell-fate programmes via regulated protein turnover.

   Evidence Targeted ubiquitination and substrate identification within the PfGID complex, with substrate protein-level readout following genetic deletion of complex components

   PMID:41986327

   Open questions at the time

   • PF3D7_1330500's individual catalytic or substrate-recognition contribution is not distinguished from other complex members
   • It is not established whether PF3D7_1330500 directly contacts GD1 or PfDPL
   • The mechanism by which ubiquitination of these substrates rewires cell fate is not detailed

• The specific molecular function of PF3D7_1330500 within the PfGID complex — its structural placement, whether it confers substrate specificity, and its individual requirement — remains unresolved.
• No subunit-resolved biochemistry isolating PF3D7_1330500's role
• No structural model of the CTLH subunit within PfGID
• No direct binding data between PF3D7_1330500 and identified substrates