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Phosphoinositides (or phosphatidylinositol phosphates, PIPs) are low-abundance membrane phospholipids that act, in conjunction with their binding partners, as important constitutive signals defining biochemical organelle identity as well as membrane trafficking and signal transduction at eukaryotic cellular membranes. In this review, we present roles for PIP residues and PIP-binding proteins in endocytosis and autophagy in protist parasites such as Trypanosoma brucei, Toxoplasma gondii, Plasmodium falciparum, Entamoeba histolytica, and Giardia lamblia. Molecular parasitologists with an interest in comparative cell and molecular biology of membrane trafficking in protist lineages beyond the phylum Apicomplexa, along with cell and molecular biologists generally interested in the diversification of membrane trafficking in eukaryotes, will hopefully find this review to be a useful resource.
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http://dx.doi.org/10.1016/j.pt.2019.08.008 | DOI Listing |
Acta Neuropathol Commun
September 2025
Department of Biomedical and Clinical Sciences and Department of Clinical Pathology, Linköping University, 58185, Linköping, Sweden.
Disruptions in synaptic transmission and plasticity are early hallmarks of Alzheimer's disease (AD). Endosomal trafficking, mediated by the retromer complex, is essential for intracellular protein sorting, including the regulation of amyloid precursor protein (APP) processing. The VPS35 subunit, a key cargo-recognition component of the retromer, has been implicated in neurodegenerative diseases, with mutations such as L625P linked to early-onset AD.
View Article and Find Full Text PDFNat Methods
September 2025
Electron Microscopy Science Technology Platform, The Francis Crick Institute, London, UK.
Volume correlative light and electron microscopy (vCLEM) is a powerful imaging technique that enables the visualization of fluorescently labeled proteins within their ultrastructural context. Currently, vCLEM alignment relies on time-consuming and subjective manual methods. This paper presents CLEM-Reg, an algorithm that automates the three-dimensional alignment of vCLEM datasets by leveraging probabilistic point cloud registration techniques.
View Article and Find Full Text PDFJ Infect Dis
September 2025
Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, WA USA.
Sequestration of Plasmodium falciparum-infected erythrocytes (IE) in the microvasculature is a major virulence determinant. While the sequestration of mature stage parasites (trophozoite and schizonts) to vascular endothelium is well established, the conditions that promote ring-stage IE sequestration is less understood. Here, we observed in ring-stage parasites that febrile exposure increased transcript levels of several exported parasite genes involved in the trafficking of the P.
View Article and Find Full Text PDFMol Plant Pathol
September 2025
National Key Laboratory of Green Pesticide/Guangdong Province Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou, China.
Among eukaryotes, Rab GTPases are critical for intracellular membrane trafficking and possess various functions. Oomycetes, responsible for many devastating plant diseases, pose a significant threat to global agriculture. However, the functions of Rab GTPases in oomycetes are largely uncharted.
View Article and Find Full Text PDFHandb Exp Pharmacol
September 2025
Department of Medicine, Duke University Medical Center, Durham, NC, USA.
GPCRs are known for their versatile signaling roles at the plasma membrane; however, recent studies have revealed that these receptors also function within various intracellular compartments, such as endosomes, the Golgi apparatus, and the endoplasmic reticulum. This spatially distinct signaling, termed location bias, allows GPCRs to initiate unique signaling cascades and influence cellular processes-including cAMP production, calcium mobilization, and protein phosphorylation-in a compartment-specific manner. By mapping the impact of GPCR signaling from these subcellular locations, this chapter emphasizes the mechanisms underlying signaling from intracellular receptor pools in diversifying receptor functionality.
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