[English] 日本語
Yorodumi
- EMDB-37570: Cryo-EM structure of the flagellar C ring in the CW state -

+
Open data


ID or keywords:

Loading...

-
Basic information

Entry
Database: EMDB / ID: EMD-37570
TitleCryo-EM structure of the flagellar C ring in the CW state
Map data
Sample
  • Complex: C ring-containing flagellar motor-hook complex in the CW state
    • Protein or peptide: Flagellar motor switch protein FliN
    • Protein or peptide: Flagellar M-ring protein
    • Protein or peptide: Flagellar motor switch protein FliM
    • Protein or peptide: Flagellar motor switch protein FliG
    • Protein or peptide: Chemotaxis protein CheY
KeywordsFlagellum / Flagellar motor / C ring / Switch complex / MOTOR PROTEIN
Function / homology
Function and homology information


archaeal or bacterial-type flagellum-dependent cell motility / bacterial-type flagellum basal body, MS ring / bacterial-type flagellum basal body / bacterial-type flagellum-dependent swarming motility / positive chemotaxis / phosphorelay signal transduction system / cytoskeletal motor activity / bacterial-type flagellum-dependent cell motility / chemotaxis / metal ion binding ...archaeal or bacterial-type flagellum-dependent cell motility / bacterial-type flagellum basal body, MS ring / bacterial-type flagellum basal body / bacterial-type flagellum-dependent swarming motility / positive chemotaxis / phosphorelay signal transduction system / cytoskeletal motor activity / bacterial-type flagellum-dependent cell motility / chemotaxis / metal ion binding / plasma membrane / cytoplasm
Similarity search - Function
Flagellar motor switch protein FliN, N-terminal / Flagellar motor switch protein FliN N-terminal / : / Flagellar motor switch FliN / Flagellar motor switch FliN/Type III secretion HrcQb / Flagellar motor switch protein FliM / Flagellar motor switch protein FliM / Flagellar motor switch protein FliG / Flagellar motor switch protein FliG, alpha-helical / Flagellar motor switch protein FliG, C-terminal ...Flagellar motor switch protein FliN, N-terminal / Flagellar motor switch protein FliN N-terminal / : / Flagellar motor switch FliN / Flagellar motor switch FliN/Type III secretion HrcQb / Flagellar motor switch protein FliM / Flagellar motor switch protein FliM / Flagellar motor switch protein FliG / Flagellar motor switch protein FliG, alpha-helical / Flagellar motor switch protein FliG, C-terminal / Flagellar motor switch protein FliG, N-terminal domain / Flagellar motor switch protein FliG, middle domain / FliG C-terminal domain / FliG middle domain / FliG N-terminal domain / CheC-like superfamily / Flagellar motor switch protein FliN-like, C-terminal domain / SpoA-like superfamily / Type III flagellar switch regulator (C-ring) FliN C-term / : / Flagellar M-ring protein FliF / Flagellar M-ring C-terminal / Flagellar M-ring protein C-terminal / Lipoprotein YscJ/Flagellar M-ring protein / Secretory protein of YscJ/FliF family / Flagellar M-ring , N-terminal / AMP-binding enzyme, C-terminal domain superfamily / Response regulator receiver domain / cheY-homologous receiver domain / Signal transduction response regulator, receiver domain / Response regulatory domain profile. / CheY-like superfamily
Similarity search - Domain/homology
Flagellar motor switch protein FliG / Chemotaxis protein CheY / Flagellar M-ring protein / Flagellar motor switch protein FliM / Flagellar motor switch protein FliN
Similarity search - Component
Biological speciesSalmonella enterica subsp. enterica serovar Typhimurium str. LT2 (bacteria)
Methodsingle particle reconstruction / cryo EM / Resolution: 5.6 Å
AuthorsTan JX / Zhang L / Zhou Y / Zhu YQ
Funding support China, 3 items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC)81925024 China
National Natural Science Foundation of China (NSFC)U23A20163 China
Ministry of Science and Technology (MoST, China)2017YFA0503900 China
CitationJournal: Cell Res / Year: 2024
Title: Structural basis of the bacterial flagellar motor rotational switching.
Authors: Jiaxing Tan / Ling Zhang / Xingtong Zhou / Siyu Han / Yan Zhou / Yongqun Zhu /
Abstract: The bacterial flagellar motor is a huge bidirectional rotary nanomachine that drives rotation of the flagellum for bacterial motility. The cytoplasmic C ring of the flagellar motor functions as the ...The bacterial flagellar motor is a huge bidirectional rotary nanomachine that drives rotation of the flagellum for bacterial motility. The cytoplasmic C ring of the flagellar motor functions as the switch complex for the rotational direction switching from counterclockwise to clockwise. However, the structural basis of the rotational switching and how the C ring is assembled have long remained elusive. Here, we present two high-resolution cryo-electron microscopy structures of the C ring-containing flagellar basal body-hook complex from Salmonella Typhimurium, which are in the default counterclockwise state and in a constitutively active CheY mutant-induced clockwise state, respectively. In both complexes, the C ring consists of four subrings, but is in two different conformations. The CheY proteins are bound into an open groove between two adjacent protomers on the surface of the middle subring of the C ring and interact with the FliG and FliM subunits. The binding of the CheY protein induces a significant upward shift of the C ring towards the MS ring and inward movements of its protomers towards the motor center, which eventually remodels the structures of the FliG subunits and reverses the orientations and surface electrostatic potential of the α helices to trigger the counterclockwise-to-clockwise rotational switching. The conformational changes of the FliG subunits reveal that the stator units on the motor require a relocation process in the inner membrane during the rotational switching. This study provides unprecedented molecular insights into the rotational switching mechanism and a detailed overall structural view of the bacterial flagellar motors.
History
DepositionSep 25, 2023-
Header (metadata) releaseSep 4, 2024-
Map releaseSep 4, 2024-
UpdateMar 26, 2025-
Current statusMar 26, 2025Processing site: PDBj / Status: Released

-
Structure visualization

Supplemental images

emd_37570.png

Downloads & links

-
Map

FileDownload / File: emd_37570.map.gz / Format: CCP4 / Size: 824 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.2 Å/pix.
x 600 pix.
= 720. Å		1.2 Å/pix.
x 600 pix.
= 720. Å		1.2 Å/pix.
x 600 pix.
= 720. Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.2 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.08
Minimum - Maximum-0.22177401 - 0.43774152
Average (Standard dev.)-0.00056422706 (±0.020221904)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions600600600
Spacing600600600
CellA=B=C: 720.0 Å
α=β=γ: 90.0 °

-
Supplemental data

-
Half map: #2

Fileemd_37570_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

-
Half map: #1

Fileemd_37570_half_map_2.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

-
Sample components

-
Entire : C ring-containing flagellar motor-hook complex in the CW state

EntireName: C ring-containing flagellar motor-hook complex in the CW state
Components
  • Complex: C ring-containing flagellar motor-hook complex in the CW state
    • Protein or peptide: Flagellar motor switch protein FliN
    • Protein or peptide: Flagellar M-ring protein
    • Protein or peptide: Flagellar motor switch protein FliM
    • Protein or peptide: Flagellar motor switch protein FliG
    • Protein or peptide: Chemotaxis protein CheY

-
Supramolecule #1: C ring-containing flagellar motor-hook complex in the CW state

SupramoleculeName: C ring-containing flagellar motor-hook complex in the CW state
type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Salmonella enterica subsp. enterica serovar Typhimurium str. LT2 (bacteria)

-
Macromolecule #1: Flagellar motor switch protein FliN

MacromoleculeName: Flagellar motor switch protein FliN / type: protein_or_peptide / ID: 1 / Number of copies: 102 / Enantiomer: LEVO
Source (natural)Organism: Salmonella enterica subsp. enterica serovar Typhimurium str. LT2 (bacteria)
Molecular weightTheoretical: 14.801823 KDa
SequenceString:
MSDMNNPSDE NTGALDDLWA DALNEQKATT TKSAADAVFQ QLGGGDVSGA MQDIDLIMDI PVKLTVELGR TRMTIKELLR LTQGSVVAL DGLAGEPLDI LINGYLIAQG EVVVVADKYG VRITDIITPS ERMRRLSR

UniProtKB: Flagellar motor switch protein FliN

-
Macromolecule #2: Flagellar M-ring protein

MacromoleculeName: Flagellar M-ring protein / type: protein_or_peptide / ID: 2 / Number of copies: 34 / Enantiomer: LEVO
Source (natural)Organism: Salmonella enterica subsp. enterica serovar Typhimurium str. LT2 (bacteria)
Molecular weightTheoretical: 61.295645 KDa
SequenceString: MSATASTATQ PKPLEWLNRL RANPRIPLIV AGSAAVAIVV AMVLWAKTPD YRTLFSNLSD QDGGAIVAQL TQMNIPYRFA NGSGAIEVP ADKVHELRLR LAQQGLPKGG AVGFELLDQE KFGISQFSEQ VNYQRALEGE LARTIETLGP VKSARVHLAM P KPSLFVRE ...String:
MSATASTATQ PKPLEWLNRL RANPRIPLIV AGSAAVAIVV AMVLWAKTPD YRTLFSNLSD QDGGAIVAQL TQMNIPYRFA NGSGAIEVP ADKVHELRLR LAQQGLPKGG AVGFELLDQE KFGISQFSEQ VNYQRALEGE LARTIETLGP VKSARVHLAM P KPSLFVRE QKSPSASVTV TLEPGRALDE GQISAVVHLV SSAVAGLPPG NVTLVDQSGH LLTQSNTSGR DLNDAQLKFA ND VESRIQR RIEAILSPIV GNGNVHAQVT AQLDFANKEQ TEEHYSPNGD ASKATLRSRQ LNISEQVGAG YPGGVPGALS NQP APPNEA PIATPPTNQQ NAQNTPQTST STNSNSAGPR STQRNETSNY EVDRTIRHTK MNVGDIERLS VAVVVNYKTL ADGK PLPLT ADQMKQIEDL TREAMGFSDK RGDTLNVVNS PFSAVDNTGG ELPFWQQQSF IDQLLAAGRW LLVLVVAWIL WRKAV RPQL TRRVEEAKAA QEQAQVRQET EEAVEVRLSK DEQLQQRRAN QRLGAEVMSQ RIREMSDNDP RVVALVIRQW MSNDHE

UniProtKB: Flagellar M-ring protein

-
Macromolecule #3: Flagellar motor switch protein FliM

MacromoleculeName: Flagellar motor switch protein FliM / type: protein_or_peptide / ID: 3 / Number of copies: 34 / Enantiomer: LEVO
Source (natural)Organism: Salmonella enterica subsp. enterica serovar Typhimurium str. LT2 (bacteria)
Molecular weightTheoretical: 37.901066 KDa
SequenceString: MGDSILSQAE IDALLNGDSD TKDEPTPGIA SDSDIRPYDP NTQRRVVRER LQALEIINER FARQFRMGLF NLLRRSPDIT VGAIRIQPY HEFARNLPVP TNLNLIHLKP LRGTGLVVFS PSLVFIAVDN LFGGDGRFPT KVEGREFTHT EQRVINRMLK L ALEGYSDA ...String:
MGDSILSQAE IDALLNGDSD TKDEPTPGIA SDSDIRPYDP NTQRRVVRER LQALEIINER FARQFRMGLF NLLRRSPDIT VGAIRIQPY HEFARNLPVP TNLNLIHLKP LRGTGLVVFS PSLVFIAVDN LFGGDGRFPT KVEGREFTHT EQRVINRMLK L ALEGYSDA WKAINPLEVE YVRSEMQVKF TNITTSPNDI VVNTPFHVEI GNLTGEFNIC LPFSMIEPLR ELLVNPPLEN SR HEDQNWR DNLVRQVQHS ELELVANFAD IPLRLSQILK LKPGDVLPIE KPDRIIAHVD GVPVLTSQYG TVNGQYALRV EHL INPILN SLNEEQPK

UniProtKB: Flagellar motor switch protein FliM

-
Macromolecule #4: Flagellar motor switch protein FliG

MacromoleculeName: Flagellar motor switch protein FliG / type: protein_or_peptide / ID: 4 / Number of copies: 34 / Enantiomer: LEVO
Source (natural)Organism: Salmonella enterica subsp. enterica serovar Typhimurium str. LT2 (bacteria)
Molecular weightTheoretical: 36.890957 KDa
SequenceString: MSNLSGTDKS VILLMTIGED RAAEVFKHLS TREVQALSTA MANVRQISNK QLTDVLSEFE QEAEQFAALN INANEYLRSV LVKALGEER ASSLLEDILE TRDTTSGIET LNFMEPQSAA DLIRDEHPQI IATILVHLKR SQAADILALF DERLRHDVML R IATFGGVQ ...String:
MSNLSGTDKS VILLMTIGED RAAEVFKHLS TREVQALSTA MANVRQISNK QLTDVLSEFE QEAEQFAALN INANEYLRSV LVKALGEER ASSLLEDILE TRDTTSGIET LNFMEPQSAA DLIRDEHPQI IATILVHLKR SQAADILALF DERLRHDVML R IATFGGVQ PAALAELTEV LNGLLDGQNL KRSKMGGVRT AAEIINLMKT QQEEAVITAV REFDGELAQK IIDEMFLFEN LV DVDDRSI QRLLQEVDSE SLLIALKGAE PPLREKFLRN MSQRAADILR DDLANRGPVR LSQVENEQKA ILLIVRRLAE TGE MVIGSG EDTYV

UniProtKB: Flagellar motor switch protein FliG

-
Macromolecule #5: Chemotaxis protein CheY

MacromoleculeName: Chemotaxis protein CheY / type: protein_or_peptide / ID: 5 / Number of copies: 34 / Enantiomer: LEVO
Source (natural)Organism: Salmonella enterica subsp. enterica serovar Typhimurium str. LT2 (bacteria)
Molecular weightTheoretical: 14.177512 KDa
Recombinant expressionOrganism: Escherichia coli BL21(DE3) (bacteria)
SequenceString:
MADKELKFLV VDKFSTMRRI VRNLLKELGF NNVEEAEDGV DALNKLQAGG FGFIISDWNM PNMDGLELLK TIRADSAMSA LPVLMVTAE AKKENIIAAA QAGASGWVVK PFTAATLEEK LNKIFEKLGM

UniProtKB: Chemotaxis protein CheY

-
Experimental details

-
Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

-
Sample preparation

BufferpH: 8
Component:
ConcentrationFormulaName
11.7 mMTris-HCltris(hydroxymethyl)aminomethane hydrochloride
4.17 mMEDTAethylenediaminetetraacetic acid
0.083 % (v/v)TX-100octylphenol ethoxylate
25.0 mMNaClsodium chloride
GridModel: Quantifoil R0.6/1 / Material: GOLD / Mesh: 200 / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 180 sec. / Pretreatment - Atmosphere: AIR
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277.15 K / Instrument: FEI VITROBOT MARK IV
Details: Blot time: 4 Blot force: 10 Wait time: 30 Blot total: 1 Drain time: 2.
DetailsThis sample was prepared by incubating the C ring-containing flagellar motor-hook complex with the constitutively active mutant of CheY (CheY**)

-
Electron microscopy

MicroscopeFEI TITAN KRIOS
Specialist opticsEnergy filter - Name: TFS Selectris / Energy filter - Slit width: 10 eV
Image recordingFilm or detector model: FEI FALCON IV (4k x 4k) / Average electron dose: 50.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 1.8 µm / Nominal defocus min: 1.2 µm / Nominal magnification: 105000
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

+
Image processing

Particle selectionNumber selected: 46058 / Details: Particles were manually picked using cryoSPARC
Startup modelType of model: OTHER
Final reconstructionApplied symmetry - Point group: C34 (34 fold cyclic) / Resolution.type: BY AUTHOR / Resolution: 5.6 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC (ver. 4.1.1) / Number images used: 28119
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC (ver. 4.1.1)
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC (ver. 4.1.1)
FSC plot (resolution estimation)

-
Atomic model buiding 1

Initial modelPDB ID:

8xp1


Chain - Source name: PDB / Chain - Initial model type: experimental model
RefinementSpace: REAL / Protocol: RIGID BODY FIT
Output model

PDB-8wiw:
Cryo-EM structure of the flagellar C ring in the CW state

+
About Yorodumi

-
News

-
Feb 9, 2022. New format data for meta-information of EMDB entries

New format data for meta-information of EMDB entries

  • Version 3 of the EMDB header file is now the official format.
  • The previous official version 1.9 will be removed from the archive.

Related info.:EMDB header

External links:wwPDB to switch to version 3 of the EMDB data model

-
Aug 12, 2020. Covid-19 info

Covid-19 info

URL: https://pdbj.org/emnavi/covid19.php

New page: Covid-19 featured information page in EM Navigator.

Related info.:Covid-19 info / Mar 5, 2020. Novel coronavirus structure data

+
Mar 5, 2020. Novel coronavirus structure data

Novel coronavirus structure data

Related info.:Yorodumi Speices / Aug 12, 2020. Covid-19 info

External links:COVID-19 featured content - PDBj / Molecule of the Month (242)：Coronavirus Proteases

+
Jan 31, 2019. EMDB accession codes are about to change! (news from PDBe EMDB page)

EMDB accession codes are about to change! (news from PDBe EMDB page)

  • The allocation of 4 digits for EMDB accession codes will soon come to an end. Whilst these codes will remain in use, new EMDB accession codes will include an additional digit and will expand incrementally as the available range of codes is exhausted. The current 4-digit format prefixed with “EMD-” (i.e. EMD-XXXX) will advance to a 5-digit format (i.e. EMD-XXXXX), and so on. It is currently estimated that the 4-digit codes will be depleted around Spring 2019, at which point the 5-digit format will come into force.
  • The EM Navigator/Yorodumi systems omit the EMD- prefix.

Related info.:Q: What is EMD? / ID/Accession-code notation in Yorodumi/EM Navigator

External links:EMDB Accession Codes are Changing Soon! / Contact to PDBj

+
Jul 12, 2017. Major update of PDB

Major update of PDB

  • wwPDB released updated PDB data conforming to the new PDBx/mmCIF dictionary.
  • This is a major update changing the version number from 4 to 5, and with Remediation, in which all the entries are updated.
  • In this update, many items about electron microscopy experimental information are reorganized (e.g. em_software).
  • Now, EM Navigator and Yorodumi are based on the updated data.

External links:wwPDB Remediation / Enriched Model Files Conforming to OneDep Data Standards Now Available in the PDB FTP Archive

-
Yorodumi

Thousand views of thousand structures

  • Yorodumi is a browser for structure data from EMDB, PDB, SASBDB, etc.
  • This page is also the successor to EM Navigator detail page, and also detail information page/front-end page for Omokage search.
  • The word "yorodu" (or yorozu) is an old Japanese word meaning "ten thousand". "mi" (miru) is to see.

Related info.:EMDB / PDB / SASBDB / Comparison of 3 databanks / Yorodumi Search / Aug 31, 2016. New EM Navigator & Yorodumi / Yorodumi Papers / Jmol/JSmol / Function and homology information / Changes in new EM Navigator and Yorodumi

Read more