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TitleCryo-EM Structure of the Flagellar Motor Complex from sp. TCA20.
Journal, issue, pagesBiomolecules, Vol. 15, Issue 3, Year 2025
Publish dateMar 18, 2025
AuthorsSakura Onoe / Tatsuro Nishikino / Miki Kinoshita / Norihiro Takekawa / Tohru Minamino / Katsumi Imada / Keiichi Namba / Jun-Ichi Kishikawa / Takayuki Kato /
PubMed AbstractThe bacterial flagellum, a complex nanomachine composed of numerous proteins, is utilized by bacteria for swimming in various environments and plays a crucial role in their survival and infection. ...The bacterial flagellum, a complex nanomachine composed of numerous proteins, is utilized by bacteria for swimming in various environments and plays a crucial role in their survival and infection. The flagellar motor is composed of a rotor and stator complexes, with each stator unit functioning as an ion channel that converts flow from outside of cell membrane into rotational motion. sp. TCA20 was discovered in a hot spring, and a structural analysis was conducted on the stator complex using cryo-electron microscopy to elucidate its function. Two of the three structures (Classes 1 and 3) were found to have structural properties typical for other stator complexes. In contrast, in Class 2 structures, the pentamer ring of the A subunits forms a C-shape, with lauryl maltose neopentyl glycol (LMNG) bound to the periplasmic side of the interface between the A and B subunits. This interface is conserved in all stator complexes, suggesting that hydrophobic ligands and lipids can bind to this interface, a feature that could potentially be utilized in the development of novel antibiotics aimed at regulating cell motility and infection.
External linksBiomolecules / PubMed:40149971 / PubMed Central
MethodsEM (single particle)
Resolution3.3 - 3.5 Å
Structure data

63392

9lu9

EMDB-63392, PDB-9lu9:
The chimeric flagellar motor complex between MotA1B1 from Paenibacillus sp. TCA20 and MotAB from E.coli, state 1
Method: EM (single particle) / Resolution: 3.3 Å

63393

9lub

EMDB-63393, PDB-9lub:
The chimeric flagellar motor complex between MotA1B1 from Paenibacillus sp. TCA20 and MotAB from E.coli, state 2
Method: EM (single particle) / Resolution: 3.3 Å

63394

9luc

EMDB-63394, PDB-9luc:
The chimeric flagellar motor complex between MotA1B1 from Paenibacillus sp. TCA20 and MotAB from E.coli, state 3
Method: EM (single particle) / Resolution: 3.5 Å

Chemicals

ChemComp-AV0:
Lauryl Maltose Neopentyl Glycol

Source
  • paenibacillus sp. tca20 (bacteria)
  • escherichia coli (E. coli)
KeywordsMOTOR PROTEIN / Flagellar / motility / Paenibacillus

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