ArticleThe ISME journal2025
Unusual cell surfaces, pili, and archaella of Thermoplasmatales archaea.
Article in The ISME journal, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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Who cites it
1 citing paper in PubMed.
- Two types of sheathed archaellum structures from Haloarcula marismortui differ in their outer layer architectures.Nature communications · 2026Article
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11 authors.
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Abstract
Archaea of the order Thermoplasmatales push the boundaries of our current knowledge of prokaryotic life. They show distinct cellular plasticity, heterogenous cell morphologies, and lack a paracrystalline S-layer. As the S-layer has previously been implicated in acting as a stator scaffold for filaments driving cellular propulsion, particularly archaella, we asked whether the absence of an S-layer precludes the formation of functional archaella or pili in Thermoplasmatales. Using cryoEM, we investigated the two Thermoplasmatales species Cuniculiplasma divulgatum and Oxyplasma meridianum. We found that these species indeed generate pili and archaella and that the latter likely function in cellular propulsion. Whereas C. divulgatum produces pili with terminal hooks using a unique assembly machinery, O. meridianum generates unusually wide, "barbed" archaella with a high degree of glycosylation. Our results show that for the generation of functional archaella and pili, a canonical S-layer is not necessary.
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