PF3D7_1141800

PF3D7_1141800 (EELM2) is a nuclear-localized protein of Plasmodium falciparum implicated in the epigenetic control of asexual blood stage transcription through its association with the PfMORC-centered chromatin complex (PMID:39412522, PMID:23181666). It was recovered in the experimentally determined core nuclear proteome, with transgenic tagging confirming a distinct sub-nuclear localization pattern consistent with a transcriptional regulatory role (PMID:23181666, PMID:19765590). It physically associates with PfMORC (PF3D7_1468100) as a binding partner within a nuclear complex that includes chromatin remodelers implicated in asexual blood stage transcriptional regulation (PMID:39412522). Beyond this complex membership and its nuclear localization, no molecular function specific to EELM2 itself has been characterized in the available corpus.

1. 2009 Low

   The first question was whether EELM2 is a nuclear protein at all; bioinformatic prediction plus epitope tagging established that it localizes to a discrete sub-nuclear region, hinting at a transcriptional regulatory role.

   Evidence Bioinformatic identification with GFP/HA tagging and fluorescence microscopy in transgenic P. falciparum

   PMID:19765590

   Open questions at the time

   • No direct functional consequence established for the protein
   • The sub-nuclear compartment was not molecularly defined
   • No interaction partners identified at this stage
2. 2012 Medium

   To move beyond prediction, the protein's nuclear residence was independently verified as part of the experimentally determined core nuclear proteome, corroborating the localization by fractionation and transgenic validation.

   Evidence Nuclear fractionation with high-accuracy mass spectrometry plus GFP/epitope-tagged transgenic validation

   PMID:23181666

   Open questions at the time

   • Establishes localization but not molecular activity
   • No binding partners or substrates identified
   • Single-lab validation
3. 2024 Medium

   The key advance was placing EELM2 within a functional context: it was identified as a binding partner of PfMORC in a nuclear complex, connecting it to chromatin remodeling and epigenetic control of asexual blood stage transcription.

   Evidence Co-immunoprecipitation and proteomics of the PfMORC interactome in a multi-omic study

   PMID:39412522

   Open questions at the time

   • Single Co-IP/proteomics identification without direct functional follow-up specific to EELM2
   • EELM2's own molecular activity within the complex is undefined
   • Whether EELM2 is required for complex integrity or MORC function is unknown

• The central open question is what specific molecular function EELM2 contributes within the PfMORC complex and whether its loss perturbs epigenetic control of blood stage gene expression.
• No knockout, knockdown, or conditional depletion of EELM2 reported
• No enzymatic or DNA/chromatin-binding activity assigned to the protein
• No structural or domain-function characterization of the EELM2 domain in this protein