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- EMDB-39349: Cryo-EM structure of the flagellar C ring in the CCW state -

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Basic information

Entry
Database: EMDB / ID: EMD-39349
TitleCryo-EM structure of the flagellar C ring in the CCW state
Map dataExperimental map
Sample
  • Complex: C ring-containing flagellar motor-hook complex in the CCW state
    • Protein or peptide: Flagellar motor switch protein FliG
    • Protein or peptide: Flagellar M-ring protein
    • Protein or peptide: Flagellar motor switch protein FliM
    • Protein or peptide: Flagellar motor switch protein FliN
KeywordsFlagellum / Flagellar motor / C ring / Switch complex / MOTOR PROTEIN
Function / homology
Function and homology information


bacterial-type flagellum basal body, MS ring / bacterial-type flagellum basal body / bacterial-type flagellum-dependent swarming motility / positive chemotaxis / cytoskeletal motor activity / bacterial-type flagellum-dependent cell motility / chemotaxis / plasma membrane
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
Similarity search - Domain/homology
Flagellar motor switch protein FliG / 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: 5.9 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: To Be Published
Title: Cryo-EM structure of the flagellar C ring in the CCW state
Authors: Tan JX / Zhang L / Zhou Y / Zhu YQ
History
DepositionMar 2, 2024-
Header (metadata) releaseSep 4, 2024-
Map releaseSep 4, 2024-
UpdateSep 4, 2024-
Current statusSep 4, 2024Processing site: PDBj / Status: Released

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Structure visualization

Supplemental images

emd_39349.png

Downloads & links

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Map

FileDownload / File: emd_39349.map.gz / Format: CCP4 / Size: 824 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationExperimental map
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.1 Å/pix.
x 600 pix.
= 660. Å		1.1 Å/pix.
x 600 pix.
= 660. Å		1.1 Å/pix.
x 600 pix.
= 660. Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.1 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.13
Minimum - Maximum-0.27628997 - 0.49781805
Average (Standard dev.)0.0014160421 (±0.030103369)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions600600600
Spacing600600600
CellA=B=C: 660.0 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: Half map A

Fileemd_39349_half_map_1.map
AnnotationHalf map A
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Half map B

Fileemd_39349_half_map_2.map
AnnotationHalf map B
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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

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

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

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

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Macromolecule #1: Flagellar motor switch protein FliG

MacromoleculeName: Flagellar motor switch protein FliG / type: protein_or_peptide / ID: 1 / 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

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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

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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

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Macromolecule #4: Flagellar motor switch protein FliN

MacromoleculeName: Flagellar motor switch protein FliN / type: protein_or_peptide / ID: 4 / 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

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

BufferpH: 8
Component:
ConcentrationFormulaName
10.0 mMTris-HCltris(hydroxymethyl)aminomethane hydrochloride
5.0 mMEDTAethylenediaminetetraacetic acid
0.1 % v/vTX-100octylphenol ethoxylate
GridModel: Quantifoil R0.6/1 / Material: GOLD / Mesh: 300 / 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: 2 Blot force: -5 Wait time: 5 Blot total: 1 Drain time: 2.

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Average electron dose: 41.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: SPOT SCAN / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 1.8 µm / Nominal defocus min: 1.5 µm / Nominal magnification: 81000
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 19627 / 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: 5.9 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC (ver. 4.1.1) / Number images used: 19627
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)

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Atomic model buiding 1

Initial model
ChainPDB ID
source_name: AlphaFold, initial_model_type: in silico model
source_name: PDB, initial_model_type: experimental model

8xp0

RefinementSpace: REAL / Protocol: RIGID BODY FIT
Output model

PDB-8yjt:
Cryo-EM structure of the flagellar C ring in the CCW state

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