ArticleThe Journal of eukaryotic microbiology2020
An Ultrastructural Study of the Extruded Polar Tube of Anncaliia algerae (Microsporidia).
Article in The Journal of eukaryotic microbiology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
17 citing papers in PubMed, 46 citations in OpenAlex.
- Ultrastructural insights into the polar tube invasion organelle from microsporidian parasites.Current opinion in microbiology · 2026Review
- Cryogenic electron tomography by the numbers: Charting underexplored lineages in structural cell biology.Proceedings of the National Academy of Sciences of the United States of America · 2026Article
- Cryo-ET reveals the in situ architecture of the polar tube invasion apparatus from microsporidian parasites.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
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- Ultrastructural insights into the microsporidian infection apparatus reveal the kinetics and morphological transitions of polar tube and cargo during host cell invasion.PLoS biology · 2024Article
- The microsporidian polar tube: origin, structure, composition, function, and application.Parasites & vectors · 2023Review
- Germination of Microsporidian Spores: The Known and Unknown.Journal of fungi (Basel, Switzerland) · 2023Review
- Identification and localization of polar tube proteins in the extruded polar tube of the microsporidian Anncaliia algerae.Scientific reports · 2023Article
- Mechanics of Microsporidian Polar Tube Firing.Experientia supplementum (2012) · 2022Article
- Advances in the Genetic Manipulation of Nosema bombycis.Experientia supplementum (2012) · 2022Article
- The Function and Structure of the Microsporidia Polar Tube.Experientia supplementum (2012) · 2022Article
- Human microsporidian pathogenJournal of cell science · 2021Article
- Identification and characterization a novel polar tube protein (NbPTP6) from the microsporidian Nosema bombycis.Parasites & vectors · 2020Article
- 3-Dimensional organization and dynamics of the microsporidian polar tube invasion machinery.PLoS pathogens · 2020Article
- Morphology and Transcriptome Analysis of Nosema bombycis Sporoplasm and Insights into the Initial Infection of Microsporidia.mSphere · 2020Article
- Invasion of Host Cells by Microsporidia.Frontiers in microbiology · 2020Review
Corrections and comments
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Authors and funding
7 authors at 3 institutions in 2 countries.
Funding
Abstract
All microsporidia share a unique, extracellular spore stage, containing the infective sporoplasm and the apparatus for initiating infection. The polar filament/polar tube when exiting the spore transports the sporoplasm through it into a host cell. While universal, these structures and processes have been enigmatic. This study utilized several types of microscopy, describing and extending our understanding of these structures and their functions. Cryogenically preserved polar tubes vary in diameter from 155 to over 200 nm, noticeably larger than fixed-sectioned or negatively stained samples. The polar tube surface is pleated and covered with fine fibrillar material that projects from the surface and is organized in clusters or tufts. These fibrils may be the sites of glycoproteins providing protection and aiding infectivity. The polar tube surface is ridged with 5-6 nm spacing between ridges, enabling the polar tube to rapidly increase its diameter to facilitate the passage of the various cargo including cylinders, sacs or vesicles filled with particulate material and the intact sporoplasm containing a diplokaryon. The lumen of the tube is lined with a membrane that facilitates this passage. Careful examination of the terminus of the tube indicates that it has a closed tip where the membranes for the terminal sac are located.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.