7CGO

Cryo-EM structure of the flagellar motor-hook complex from Salmonella


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.90 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:  
    7E80, 7E81, 7CBL, 7CBM, 7E82, 7CG4, 7CG7, 7CG0, 7CGO, 7CGB

  • 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
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Flagellar basal-body rod protein FlgG
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, VA [auth V], WA [auth W], XA [auth X]
260Salmonella enterica subsp. enterica serovar Typhimurium str. LT2Mutation(s): 0 
Gene Names: flgGfla FVIIflaLSTM1179
Find proteins for P0A1J3 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Flagellar basal-body rod protein FlgFV [auth a], W [auth b], X [auth c], Y [auth d], Z [auth e]251Salmonella enterica subsp. enterica serovar Typhimurium str. LT2Mutation(s): 0 
Gene Names: flgFfla FVIflaXSTM1178
Find proteins for P16323 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Flagellar MS ring L2AA [auth 0], BA [auth 1], CA [auth 2], DA [auth 3], EA [auth 4]15Salmonella enterica subsp. enterica serovar Typhimurium str. LT2Mutation(s): 0 
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Flagellar MS ring L1FA [auth 5], GA [auth 6], HA [auth 7], RA [auth 8], IA [auth 9]21Salmonella enterica subsp. enterica serovar Typhimurium str. LT2Mutation(s): 0 
Gene Names: fliFfla AII.1fla BISTM1969
Find proteins for P15928 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
Flagellar basal-body rod protein FlgCJA [auth f], KA [auth g], LA [auth h], SA [auth i], MA [auth j], QA [auth p]134Salmonella enterica subsp. enterica serovar Typhimurium str. LT2Mutation(s): 0 
Gene Names: flgCfla FIIIflaWSTM1175
Find proteins for P0A1I7 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
Flagellar basal body rod protein FlgBTA [auth k], NA [auth l], OA [auth m], UA [auth n], PA [auth o]138Salmonella enterica subsp. enterica serovar Typhimurium str. LT2Mutation(s): 0 
Gene Names: flgBfla FIIflbASTM1174
Find proteins for P16437 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetailsImage
Flagellar hook-basal body complex protein FliEYA [auth q], ZA [auth r], AB [auth s], BB [auth t], CB [auth u], DB [auth v]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))
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Entity ID: 8
MoleculeChainsSequence LengthOrganismDetailsImage
Flagellar hook protein FlgE403Salmonella enterica subsp. enterica serovar Typhimurium str. LT2Mutation(s): 0 
Gene Names: flgEfla FVflaKSTM1177
Find proteins for P0A1J1 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
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Entity ID: 9
MoleculeChainsSequence LengthOrganismDetailsImage
Flagellar biosynthetic protein FliRPB [auth CE]264Salmonella enterica subsp. enterica serovar Typhimurium str. LT2Mutation(s): 0 
Gene Names: fliRflaPSTM1981
Find proteins for P54702 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
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Entity ID: 10
MoleculeChainsSequence LengthOrganismDetailsImage
Flagellar biosynthetic protein FliQQB [auth CA], RB [auth CB], SB [auth CC], TB [auth CD]89Salmonella enterica subsp. enterica serovar Typhimurium str. LT2Mutation(s): 0 
Gene Names: fliQflaQSTM1980
Find proteins for P0A1L5 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
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Entity ID: 11
MoleculeChainsSequence LengthOrganismDetailsImage
Flagellar biosynthetic protein FliPYB [auth CF], UB [auth w], VB [auth x], WB [auth y], XB [auth z]245Salmonella enterica subsp. enterica serovar Typhimurium str. LT2Mutation(s): 0 
Gene Names: fliPflaRSTM1979
Find proteins for P54700 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
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Entity ID: 13
MoleculeChainsSequence LengthOrganismDetailsImage
FlgB-Dc loopWC [auth GA], GD [auth GB], DD [auth GC], FD [auth GD], ED [auth GE]12Salmonella enterica subsp. enterica serovar Typhimurium str. LT2Mutation(s): 0 
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Entity ID: 14
MoleculeChainsSequence LengthOrganismDetailsImage
FliE helix 1XC [auth GF], YC [auth GG], ZC [auth GH], AD [auth GI], BD [auth GJ], CD [auth GK]18Salmonella enterica subsp. enterica serovar Typhimurium str. LT2Mutation(s): 0 
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Entity ID: 15
MoleculeChainsSequence LengthOrganismDetailsImage
Flagellar L-ring protein232Salmonella enterica subsp. enterica serovar Typhimurium str. LT2Mutation(s): 0 
Gene Names: flgHfla FVIIIflaYSTM1180
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Entity ID: 16
MoleculeChainsSequence LengthOrganismDetailsImage
Flagellar P-ring protein365Salmonella enterica subsp. enterica serovar Typhimurium str. LT2Mutation(s): 0 
Gene Names: flgIfla FIXflaMSTM1181
Find proteins for P15930 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
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  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
P1L
Query on P1L
AF [auth AL] , BF [auth AM] , CF [auth AN] , DF [auth AO] , EF [auth AP] , FF [auth AQ] , GF [auth AR] , HF [auth AS] , 
AF [auth AL],  BF [auth AM],  CF [auth AN],  DF [auth AO],  EF [auth AP],  FF [auth AQ],  GF [auth AR],  HF [auth AS],  IF [auth AT],  JF [auth AU],  KF [auth AV],  LF [auth AW],  MF [auth AX],  NF [auth AY],  OF [auth AZ],  PE [auth AA],  QE [auth AB],  RE [auth AC],  SE [auth AD],  TE [auth AE],  UE [auth AF],  VE [auth AG],  WE [auth AH],  XE [auth AI],  YE [auth AJ],  ZE [auth AK]
L-PEPTIDE LINKINGC19 H37 N O3 SCYS
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.90 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