Identification of novel inner membrane complex and apical annuli proteins of the malaria parasite Plasmodium falciparum
Identification of novel inner membrane complex and apical annuli proteins of the malaria parasite Plasmodium falciparum
ABSTRACT The inner membrane complex (IMC) is a defining feature of apicomplexan parasites, which confers stability and shape to the cell, functions as a scaffolding compartment during the formation of daughter cells and plays an important role in motility and invasion during different life cycle stages of these single celled organisms. To explore the IMC proteome of the malaria parasite Plasmodium falciparum we applied a proximity-dependent biotin identification (BioID)-based proteomics approach, using the established IMC marker protein Photosensitized INA-Labelled protein 1 (PhIL1) as bait in asexual blood-stage parasites. Subsequent mass spectrometry-based peptide identification revealed enrichment of twelve known IMC proteins and several uncharacterized candidate proteins. We validated nine of these previously uncharacterized proteins by endogenous GFP-tagging. Six of these represent new IMC proteins, while three proteins have a distinct apical localization that most likely represent structures described as apical annuli in Toxoplasma gondii. Additionally, various Kelch13 interacting candidates were identified, suggesting an association of the Kelch13 compartment and the IMC in schizont and merozoite stages. This work extends the number of validated IMC proteins in the malaria parasite and reveals for the first time the existence of apical annuli proteins in P. falciparum. Additionally, it provides evidence for a spatial association between the Kelch13 compartment and the IMC in late blood-stage parasites.
Wunderlich Juliane、Heincke Dorothee、Pazicky Samuel、Schmitt Marius、Scharf Sarah、Burda Paul-Christian、Spielmann Tobias、Gilberger Tim W.、Wichers Jan Stephan、Kimmel Jessica、Strauss Jan、Filarsky Michael、L?w Christian、Wilcke Louisa、Bachmann Anna、von Thien Heidrun
Centre for Structural Systems Biology||European Molecular Biology LaboratoryCentre for Structural Systems Biology||Bernhard Nocht Institute for Tropical Medicine||University of HamburgCentre for Structural Systems Biology||European Molecular Biology LaboratoryBernhard Nocht Institute for Tropical MedicineBernhard Nocht Institute for Tropical MedicineCentre for Structural Systems Biology||Bernhard Nocht Institute for Tropical Medicine||University of HamburgBernhard Nocht Institute for Tropical MedicineCentre for Structural Systems Biology||Bernhard Nocht Institute for Tropical Medicine||University of HamburgCentre for Structural Systems Biology||Bernhard Nocht Institute for Tropical MedicineBernhard Nocht Institute for Tropical MedicineCentre for Structural Systems Biology||Bernhard Nocht Institute for Tropical Medicine||University of HamburgCentre for Structural Systems Biology||University of HamburgCentre for Structural Systems Biology||European Molecular Biology LaboratoryCentre for Structural Systems Biology||Bernhard Nocht Institute for Tropical Medicine||University of HamburgCentre for Structural Systems Biology||Bernhard Nocht Institute for Tropical Medicine||German Centre for Infection Research (DZIF)Centre for Structural Systems Biology||Bernhard Nocht Institute for Tropical Medicine
基础医学生物科学研究方法、生物科学研究技术分子生物学
Wunderlich Juliane,Heincke Dorothee,Pazicky Samuel,Schmitt Marius,Scharf Sarah,Burda Paul-Christian,Spielmann Tobias,Gilberger Tim W.,Wichers Jan Stephan,Kimmel Jessica,Strauss Jan,Filarsky Michael,L?w Christian,Wilcke Louisa,Bachmann Anna,von Thien Heidrun.Identification of novel inner membrane complex and apical annuli proteins of the malaria parasite Plasmodium falciparum[EB/OL].(2025-03-28)[2025-05-24].https://www.biorxiv.org/content/10.1101/2021.02.03.428885.点此复制
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