ArticlePLoS pathogens2019
The knob protein KAHRP assembles into a ring-shaped structure that underpins virulence complex assembly.
Article in PLoS pathogens, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.
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Who cites it
20 citing papers in PubMed, 41 citations in OpenAlex.
- Physiological febrile heat stress increases cytoadhesion through increased protein trafficking ofeLife · 2026Article
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- Deep learning image analysis for continuous single-cell imaging of dynamic processes in Plasmodium falciparum-infected erythrocytes.Communications biology · 2025Article
- APEX2-based proximity proteomic analysis identifies candidate interactors for Plasmodium falciparum knob-associated histidine-rich protein in infected erythrocytes.Scientific reports · 2024Article
- PfEMP1 and var genes - Still of key importance in Plasmodium falciparum malaria pathogenesis and immunity.Advances in parasitology · 2024Review
- Knobs, Adhesion, and Severe Falciparum Malaria.Tropical medicine and infectious disease · 2023Review
- Cultivation of Asexual Intraerythrocytic Stages ofPathogens (Basel, Switzerland) · 2023Review
- Plasmodium schizogony, a chronology of the parasite's cell cycle in the blood stage.PLoS pathogens · 2023Review
- The Medicines for Malaria Venture Malaria Box contains inhibitors of protein secretion in Plasmodium falciparum blood stage parasites.Traffic (Copenhagen, Denmark) · 2022Article
- Deletion of the Plasmodium falciparum exported protein PTP7 leads to Maurer's clefts vesiculation, host cell remodeling defects, and loss of surface presentation of EMP1.PLoS pathogens · 2022Article
- An Invariant Protein That Colocalizes With VAR2CSA on Plasmodium falciparum-Infected Red Cells Binds to Chondroitin Sulfate A.The Journal of infectious diseases · 2022Article
- A particle-based computational model to analyse remodelling of the red blood cell cytoskeleton during malaria infections.PLoS computational biology · 2022Article
- Multimodal imaging reveals membrane skeleton reorganisation during reticulocyte maturation and differences in dimple and rim regions of mature erythrocytes.Journal of structural biology: X · 2022Article
- Co-chaperone involvement in knob biogenesis implicates host-derived chaperones in malaria virulence.PLoS pathogens · 2021Article
- The Role of Malaria Parasite Heat Shock Proteins in Protein Trafficking and Remodelling of Red Blood Cells.Advances in experimental medicine and biology · 2021Review
- Genomic and transcriptomic evidence for descent from Plasmodium and loss of blood schizogony in Hepatocystis parasites from naturally infected red colobus monkeys.PLoS pathogens · 2020Article
- Article
- Cerebral Plasmodium falciparum malaria: The role of PfEMP1 in its pathogenesis and immunity, and PfEMP1-based vaccines to prevent it.Immunological reviews · 2020Review
- Erythrocyte Membrane Makeover byFrontiers in microbiology · 2019Review
- Investigation of hub genes and their nonsynonymous single nucleotide polymorphism analysis inIndian journal of pharmacologyArticle
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Authors and funding
7 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Plasmodium falciparum mediates adhesion of infected red blood cells (RBCs) to blood vessel walls by assembling a multi-protein complex at the RBC surface. This virulence-mediating structure, called the knob, acts as a scaffold for the presentation of the major virulence antigen, P. falciparum Erythrocyte Membrane Protein-1 (PfEMP1). In this work we developed correlative STochastic Optical Reconstruction Microscopy-Scanning Electron Microscopy (STORM-SEM) to spatially and temporally map the delivery of the knob-associated histidine-rich protein (KAHRP) and PfEMP1 to the RBC membrane skeleton. We show that KAHRP is delivered as individual modules that assemble in situ, giving a ring-shaped fluorescence profile around a dimpled disk that can be visualized by SEM. Electron tomography of negatively-stained membranes reveals a previously observed spiral scaffold underpinning the assembled knobs. Truncation of the C-terminal region of KAHRP leads to loss of the ring structures, disruption of the raised disks and aberrant formation of the spiral scaffold, pointing to a critical role for KAHRP in assembling the physical knob structure. We show that host cell actin remodeling plays an important role in assembly of the virulence complex, with cytochalasin D blocking knob assembly. Additionally, PfEMP1 appears to be delivered to the RBC membrane, then inserted laterally into knob structures.
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