Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Fungal Phylum Microsporidia01:28

Fungal Phylum Microsporidia

41
Microsporidia are a group of obligate intracellular fungi that were initially classified as protists but were later reclassified based on phylogenetic, molecular, and structural evidence linking them to the Chytridiomycota. These unicellular, non-motile organisms are highly specialized parasites that infect a wide range of animal hosts, including humans. They have evolved extensive genomic and metabolic reductions, making them highly dependent on their hosts for survival.Morphology and Genomic...
41
Endospores and Sporulation01:20

Endospores and Sporulation

65
Endospores are specialized, dormant cells primarily formed by Gram-positive bacteria, including Bacillus and Clostridium, enabling survival under extreme environmental conditions. Due to their unique composition and formation process, these structures are highly resistant to physical and chemical insults, such as extreme heat, ultraviolet and ionizing radiation, desiccation, and toxic chemicals. Rare instances of endospore-like structures have also been observed in some Gram-negative bacteria,...
65
Structure of Porins01:21

Structure of Porins

3.0K
Mitochondria, chloroplasts, and gram-negative bacteria have transmembrane, beta-barrel proteins called porins to mediate the free diffusion of ions and metabolites across the membrane. Mitochondrial porin precursors contain conserved amino acid sequences called beta signals at their C-terminal. Beta signals have a  motif of PoXGXXHyXHy (Po-Polar, X-Any amino acid, G-Glycine, Hy-LargeHydrophobic), which are crucial for precursor recognition to initiate precursor assembly. Beta-barrel...
3.0K
Bacterial Phylum Tenericutes01:24

Bacterial Phylum Tenericutes

40
The phylum Tenericutes, which includes the single class Mollicutes, comprises bacteria that lack cell walls. The term "Mollicutes" derives from the Latin word mollis, meaning "soft." These organisms are among the smallest known and are commonly referred to as mycoplasmas due to the prominence of the genus Mycoplasma, which includes well-known human pathogens. Despite their inability to stain gram-positively (a result of their lack of cell walls), mycoplasmas are phylogenetically related to the...
40
Gene Regulation During Sporulation01:17

Gene Regulation During Sporulation

34
Sporulation is a complex developmental process that allows certain Gram-positive bacteria, such as Bacillus subtilis and Clostridium species, to survive extreme environmental conditions. This process is tightly regulated by a series of signaling cascades and transcriptional controls, ensuring the formation of a highly resistant endospore.Sporulation is triggered by unfavorable conditions, such as nutrient depletion, and is governed by a phosphorelay system. One of the sensor kinases, such as...
34
Bacterial Phylum Spirochaetes01:30

Bacterial Phylum Spirochaetes

39
Spirochetes, unique bacteria in the phylum Spirochaetes, are gram-negative, motile, tightly coiled, slender, and flexible. They inhabit aquatic sediments and animals, with some causing diseases like syphilis. Spirochetes are classified into eight genera based on habitat, pathogenicity, phylogeny, and characteristics.Their distinctive motility arises from endoflagella, located within the cell’s periplasm. These endoflagella anchor at the cell poles and extend along the cell length, encased...
39

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Forward genetics reveals microsporidian drug targets and recombination-based resistance.

npj antimicrobials and resistance·2026
Same author

Correction to: Melatonin at pharmacological concentrations suppresses osteoclastogenesis via the attenuation of intracellular ROS.

Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA·2026
Same author

Serpin 4/5 of <i>Nosema bombycis</i>: Molecular Characterization, Subcellular Localization and Pathogenic Roles in Interactions with <i>Bombyx mori</i>.

Microorganisms·2026
Same author

A case report of thyroid-like low-grade nasopharyngeal papillary adenocarcinoma with literature review.

Frontiers in oncology·2026
Same author

Corrigendum to "Synovium stem cell-derived matrix enhances anti-inflammatory properties of rabbit articular chondrocytes via the SIRT1 pathway" [Mater. Sci. Eng. C 106 (2020) 110286].

Biomaterials advances·2026
Same author

Hyaluronic acid-based biomaterials for the treatment of osteosarcoma and postoperative bone repair.

Biomedical materials (Bristol, England)·2026

Related Experiment Video

Updated: Jul 17, 2025

Physical Isolation of Endospores from Environmental Samples by Targeted Lysis of Vegetative Cells
09:38

Physical Isolation of Endospores from Environmental Samples by Targeted Lysis of Vegetative Cells

Published on: January 21, 2016

14.3K

The microsporidian polar tube: origin, structure, composition, function, and application.

Yuqing Chen1,2, Qing Lv1,2, Hongjie Liao1,2

  • 1State Key Laboratory of Resource Insects, Southwest University, Chongqing, 400715, China.

Parasites & Vectors
|August 30, 2023
PubMed
Summary

Microsporidia use a specialized polar tube for infecting hosts. This review details the polar tube

Keywords:
DiagnosisInteractionMicrosporidiaPolar filamentPolar tubePolar tube proteinsStructure

More Related Videos

Plasmid Stability Analysis with Open-Source Droplet Microfluidics
07:43

Plasmid Stability Analysis with Open-Source Droplet Microfluidics

Published on: December 27, 2024

565
Studying Inherited Immunity in a Caenorhabditis elegans Model of Microsporidia Infection
09:24

Studying Inherited Immunity in a Caenorhabditis elegans Model of Microsporidia Infection

Published on: April 6, 2022

2.4K

Related Experiment Videos

Last Updated: Jul 17, 2025

Physical Isolation of Endospores from Environmental Samples by Targeted Lysis of Vegetative Cells
09:38

Physical Isolation of Endospores from Environmental Samples by Targeted Lysis of Vegetative Cells

Published on: January 21, 2016

14.3K
Plasmid Stability Analysis with Open-Source Droplet Microfluidics
07:43

Plasmid Stability Analysis with Open-Source Droplet Microfluidics

Published on: December 27, 2024

565
Studying Inherited Immunity in a Caenorhabditis elegans Model of Microsporidia Infection
09:24

Studying Inherited Immunity in a Caenorhabditis elegans Model of Microsporidia Infection

Published on: April 6, 2022

2.4K

Area of Science:

  • Parasitology
  • Cell Biology
  • Microbiology

Background:

  • Microsporidia are obligate intracellular parasites infecting diverse hosts, including humans.
  • They possess a unique infection organelle, the polar tube (also polar filament).
  • The polar tube is essential for delivering parasitic components into host cells.

Purpose of the Study:

  • To review the origin, structure, composition, function, and applications of the microsporidian polar tube.
  • To elucidate the differences between the polar filament and polar tube.
  • To explore the role of polar tube proteins in microsporidian infection and diagnosis.

Main Methods:

  • Literature review of microsporidian biology and infection mechanisms.
  • Comparative analysis of polar tube protein structures.
  • Summary of host-parasite interactions involving the polar tube.

Main Results:

  • The polar tube originates from the polar filament and is crucial for host cell invasion.
  • Structural and compositional analyses reveal key characteristics of polar tube proteins.
  • Understanding polar tube-host interactions enhances knowledge of microsporidian pathogenesis.
  • Polar tube proteins show potential as diagnostic and therapeutic targets.

Conclusions:

  • The microsporidian polar tube is a complex organelle vital for infection.
  • Further research into polar tube proteins can lead to novel diagnostic and preventive strategies.
  • Comparative structural analysis aids in identifying new polar tube proteins.