7CBL

Cryo-EM structure of the flagellar LP ring from Salmonella


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.80 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural basis of assembly and torque transmission of the bacterial flagellar motor.

Tan, J.Zhang, X.Wang, X.Xu, C.Chang, S.Wu, H.Wang, T.Liang, H.Gao, H.Zhou, Y.Zhu, Y.

(2021) Cell 184: 2665-2679.e19

  • DOI: 10.1016/j.cell.2021.03.057
  • Primary Citation of Related Structures:  
    7CBL, 7CBM, 7CG4, 7CG7, 7CG0, 7CGO, 7CGB, 7E82, 7E80, 7E81

  • PubMed Abstract: 
  • The bacterial flagellar motor is a supramolecular protein machine that drives rotation of the flagellum for motility, which is essential for bacterial survival in different environments and a key determinant of pathogenicity. The detailed structure of the flagellar motor remains unknown ...

    The bacterial flagellar motor is a supramolecular protein machine that drives rotation of the flagellum for motility, which is essential for bacterial survival in different environments and a key determinant of pathogenicity. The detailed structure of the flagellar motor remains unknown. Here we present an atomic-resolution cryoelectron microscopy (cryo-EM) structure of the bacterial flagellar motor complexed with the hook, consisting of 175 subunits with a molecular mass of approximately 6.3 MDa. The structure reveals that 10 peptides protruding from the MS ring with the FlgB and FliE subunits mediate torque transmission from the MS ring to the rod and overcome the symmetry mismatch between the rotational and helical structures in the motor. The LP ring contacts the distal rod and applies electrostatic forces to support its rotation and torque transmission to the hook. This work provides detailed molecular insights into the structure, assembly, and torque transmission mechanisms of the flagellar motor.


    Organizational Affiliation

    Department of Biophysics and Department of Pathology of Sir Run Run Shaw Hospital, Life Sciences Institute and School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310058, China; The MOE Key Laboratory for Biosystems Homeostasis & Protection and Zhejiang Provincial Key Laboratory of Cancer Molecular Cell Biology, Life Sciences Institute, Zhejiang University, Hangzhou, Zhejiang 310058, China; The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, China; Institute of Microbiology, Zhejiang University, Hangzhou, Zhejiang 310058, China; Cancer Center, Zhejiang University, Hangzhou, Zhejiang 310058, China. Electronic address: zhuyongqun@zju.edu.cn.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Flagellar L-ring protein
A, B, C, D, E, F, G, H
A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z
232Salmonella enterica subsp. enterica serovar Typhimurium str. LT2Mutation(s): 0 
Gene Names: flgHfla FVIIIflaYSTM1180
Membrane Entity: Yes 
UniProt
Find proteins for P0A1N8 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
Explore P0A1N8 
Go to UniProtKB:  P0A1N8
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Flagellar P-ring protein365Salmonella enterica subsp. enterica serovar Typhimurium str. LT2Mutation(s): 0 
Gene Names: flgIfla FIXflaMSTM1181
Membrane Entity: Yes 
UniProt
Find proteins for P15930 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
Explore P15930 
Go to UniProtKB:  P15930
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
OCA
Query on OCA

Download Ideal Coordinates CCD File 
AB [auth A] , BB [auth B] , CB [auth C] , DB [auth D] , EB [auth E] , FB [auth F] , GB [auth G] , HB [auth H] , 
AB [auth A],  BB [auth B],  CB [auth C],  DB [auth D],  EB [auth E],  FB [auth F],  GB [auth G],  HB [auth H],  IB [auth I],  JB [auth J],  KB [auth K],  LB [auth L],  MB [auth M],  NB [auth N],  OB [auth O],  PB [auth P],  QB [auth Q],  RB [auth R],  SB [auth S],  TB [auth T],  UB [auth U],  VB [auth V],  WB [auth W],  XB [auth X],  YB [auth Y],  ZB [auth Z]
OCTANOIC ACID (CAPRYLIC ACID)
C8 H16 O2
WWZKQHOCKIZLMA-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.80 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report




Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Ministry of Science and Technology (MoST, China)China2017YFA0504803
Ministry of Science and Technology (MoST, China)China2018YFA0507700
Ministry of Science and Technology (MoST, China)China2017YFA0503900
National Natural Science Foundation of China (NSFC)China81925024
National Natural Science Foundation of China (NSFC)China81530068
National Natural Science Foundation of China (NSFC)China81501717

Revision History  (Full details and data files)

  • Version 1.0: 2021-04-28
    Type: Initial release
  • Version 1.1: 2021-05-05
    Changes: Database references
  • Version 1.2: 2021-05-26
    Changes: Database references