CAPD2

PF3D7_1403100 (CAPD2) is a component of the condensin I and condensin II complexes in Plasmodium falciparum, where its association with the condensin core subunits SMC2/SMC4 is stage-dependent: canonical condensin complexes assemble only in mature schizonts and during male gametogenesis, whereas in early schizogony SMC2/SMC4 localize to centromeres without forming condensin I or II (PMID:32049018). Beyond this stage-specific complex membership defined in (PMID:32049018), no further mechanistic detail specific to CAPD2 itself has been characterized in the available corpus.

1. 2020 Medium

   Whether CAPD2 participates in a canonical condensin complex in Plasmodium and when such a complex forms was unknown; defining its association with SMC2/SMC4 across life-cycle stages established that CAPD2's complex membership is temporally regulated rather than constitutive.

   Evidence Fluorescence microscopy, ChIP-seq, and co-immunoprecipitation defining condensin complex formation across life-cycle stages in P. falciparum

   PMID:32049018

   Open questions at the time

   • Mechanistic detail specific to CAPD2 is inferred from the broader condensin complex study rather than from CAPD2-directed functional assays
   • The functional consequence of CAPD2 loss or the role of CAPD2 in chromosome condensation is not directly tested
   • How CAPD2 is recruited to or excluded from the SMC2/SMC4 core in a stage-dependent manner is not resolved

• The direct molecular activity of CAPD2, its structural contribution to condensin, and the phenotypic requirement for CAPD2 in chromosome organization or gametogenesis remain uncharacterized.
• No CAPD2-specific loss-of-function phenotype reported
• No structural or biochemical characterization of CAPD2 within the condensin holocomplex
• Determinants of stage-dependent complex assembly unknown