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TitleStructure of the molecular bushing of the bacterial flagellar motor.
Journal, issue, pagesNat Commun, Vol. 12, Issue 1, Page 4469, Year 2021
Publish dateJul 22, 2021
AuthorsTomoko Yamaguchi / Fumiaki Makino / Tomoko Miyata / Tohru Minamino / Takayuki Kato / Keiichi Namba /
PubMed AbstractThe basal body of the bacterial flagellum is a rotary motor that consists of several rings (C, MS and LP) and a rod. The LP ring acts as a bushing supporting the distal rod for its rapid and stable ...The basal body of the bacterial flagellum is a rotary motor that consists of several rings (C, MS and LP) and a rod. The LP ring acts as a bushing supporting the distal rod for its rapid and stable rotation without much friction. Here, we use electron cryomicroscopy to describe the LP ring structure around the rod, at 3.5 Å resolution, from Salmonella Typhimurium. The structure shows 26-fold rotational symmetry and intricate intersubunit interactions of each subunit with up to six partners, which explains the structural stability. The inner surface is charged both positively and negatively. Positive charges on the P ring (the part of the LP ring that is embedded within the peptidoglycan layer) presumably play important roles in its initial assembly around the rod with a negatively charged surface.
External linksNat Commun / PubMed:34294704 / PubMed Central
MethodsEM (single particle)
Resolution3.5 - 6.9 Å
Structure data

30398

7clr

EMDB-30398, PDB-7clr:
CryoEM structure of S.typhimurium flagellar LP ring
Method: EM (single particle) / Resolution: 3.5 Å

EMDB-30409:
CryoEM structure of S.typhimurium flagellar hook-basal body (HBB) complex
Method: EM (single particle) / Resolution: 6.9 Å

Source
  • Salmonella enterica subsp. enterica serovar Typhimurium (bacteria)
  • salmonella typhimurium (bacteria)
KeywordsMOTOR PROTEIN / FlgH / FlgI / LP ring / Bushing / Salmonella / Flagellar motor

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