PF3D7_0731500 erythrocyte binding antigen-175

Pfμ1 co-localizeswith rhoptrymarker proteins in schizont stage parasites. Transgenic parasites expressing Pfμ1–GFPwere immunostained with antibodies specific to the Merozoite surface localized MSP1 (A), Microneme localized EBA175 (B), and Rhoptry localized RAP1 (C) and Clag3.1 (D). The parasite nuclei were stained with DAPI and slides were visualized by confocal microscopy. Representative images are shown for each antibody, together with DIC images; scale bars denote 5 μM. To quantify co-localisation, Pearson correlation coefficients of the individual stains were calculated and are shown in the right panel of each image. IFA with antibodies to rhoptry (RAP1 and Clag3.1), microneme (EBA175), and surface markers (MSP1). IFAwith anti-MSP1 antibody showed no overlap in staining betweenMSP1 and Pfμ1 (A). Similar results were seen with antibodies to EBA175 (B). Importantly, anti-RAP1 and anti-Clag3.1 showed co-localization with the Pfμ1–GFP chimeric protein (C and D), suggesting a potential role for Pfμ1 in rhoptry trafficking. Co-localization between Pfμ1 and RAP1 was first observed ~24 h post invasion in budding vesicles near the Golgi. As nuclear division commenced (32 h), Golgi multiplication occurred as well, and this resulted in apical distribution of Pfμ1 along with RAP1 in the rhoptries.

Kaderi Kibria KM, Rawat K, Klinger CM, Datta G, Panchal M, Singh S, Iyer GR, Kaur I, Sharma V, Dacks JB, Mohmmed A, Malhotra P. A role for adaptor protein complex 1 in protein targeting to rhoptry organelles in Plasmodium falciparum. Biochim Biophys Acta. 2015 1853(3):699-710.

Other associated proteins

PFID Formal Annotation
PF3D7_0302500 cytoadherence linked asexual protein 3.1
PF3D7_0501600 rhoptry-associated protein 2
PF3D7_0930300 merozoite surface protein 1
PF3D7_1311400 AP-1 complex subunit mu-1