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TitleStructures of the stator complex that drives rotation of the bacterial flagellum.
Journal, issue, pagesNat Microbiol, Vol. 5, Issue 12, Page 1553-1564, Year 2020
Publish dateSep 14, 2020
AuthorsJustin C Deme / Steven Johnson / Owen Vickery / Amy Aron / Holly Monkhouse / Thomas Griffiths / Rory Hennell James / Ben C Berks / James W Coulton / Phillip J Stansfeld / Susan M Lea /
PubMed AbstractThe bacterial flagellum is the prototypical protein nanomachine and comprises a rotating helical propeller attached to a membrane-embedded motor complex. The motor consists of a central rotor ...The bacterial flagellum is the prototypical protein nanomachine and comprises a rotating helical propeller attached to a membrane-embedded motor complex. The motor consists of a central rotor surrounded by stator units that couple ion flow across the cytoplasmic membrane to generate torque. Here, we present the structures of the stator complexes from Clostridium sporogenes, Bacillus subtilis and Vibrio mimicus, allowing interpretation of the extensive body of data on stator mechanism. The structures reveal an unexpected asymmetric AB subunit assembly where the five A subunits enclose the two B subunits. Comparison to structures of other ion-driven motors indicates that this AB architecture is fundamental to bacterial systems that couple energy from ion flow to generate mechanical work at a distance and suggests that such events involve rotation in the motor structures.
External linksNat Microbiol / PubMed:32929189 / PubMed Central
MethodsEM (single particle)
Resolution3.4 - 4.6 Å
Structure data

10895

6ysf

EMDB-10895, PDB-6ysf:
Structure of the flagellar MotAB stator complex from Clostridium sporogenes
Method: EM (single particle) / Resolution: 3.4 Å

EMDB-10897:
Structure of ExbBD complex from pseudomonas savastonoi
Method: EM (single particle) / Resolution: 3.8 Å

10899

6ysl

EMDB-10899, PDB-6ysl:
Structure of the flagellar MotAB stator complex from Bacillus subtilis
Method: EM (single particle) / Resolution: 3.5 Å

EMDB-10901:
Vibrio mimicus PomA(5)B(2) complex
Method: EM (single particle) / Resolution: 4.2 Å

EMDB-10902:
Escherichia coli ExbB(5)D(2) complex
Method: EM (single particle) / Resolution: 4.6 Å

Source
  • clostridium sporogenes (bacteria)
  • Pseudomonas savastanoi (bacteria)
  • bacillus subtilis (strain 168) (bacteria)
  • Vibrio mimicus (bacteria)
  • Escherichia coli (E. coli)
KeywordsMOTOR PROTEIN / Stator Flagellar rotation ion driven motor

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