7CG4

Cryo-EM structure of the flagellar export apparatus with FliE from Salmonella


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.60 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 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 

  • 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 hook-basal body complex protein FliEA [auth a], B [auth b], C [auth c], D [auth d], E [auth e], F [auth f]104Salmonella enterica subsp. enterica serovar Typhimurium str. LT2Mutation(s): 0 
Gene Names: fliEfla AIflaNSTM1968
Find proteins for P26462 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
Explore P26462 
Go to UniProtKB:  P26462
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Flagellar biosynthetic protein FliPG [auth r], H [auth s], I [auth t], J [auth u], K [auth v]245Salmonella enterica subsp. enterica serovar Typhimurium str. LT2Mutation(s): 0 
Gene Names: fliPflaRSTM1979
Find proteins for P54700 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
Explore P54700 
Go to UniProtKB:  P54700
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.60 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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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