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- EMDB-30350: Cryo-EM structure of the flagellar export apparatus with FliE fro... -
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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-30350 | |||||||||||||||||||||
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Title | Cryo-EM structure of the flagellar export apparatus with FliE from Salmonella | |||||||||||||||||||||
![]() | Density map of the flagellar export apparatus with FliE | |||||||||||||||||||||
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![]() | Export apparatus / FliE / MOTOR PROTEIN | |||||||||||||||||||||
Function / homology | ![]() bacterial-type flagellum organization / bacterial-type flagellum basal body / cytoskeletal motor activity / bacterial-type flagellum-dependent cell motility / protein secretion / structural molecule activity / plasma membrane Similarity search - Function | |||||||||||||||||||||
Biological species | ![]() ![]() | |||||||||||||||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.6 Å | |||||||||||||||||||||
![]() | Tan JX / Chang SH | |||||||||||||||||||||
Funding support | ![]()
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![]() | ![]() Title: Structural basis of assembly and torque transmission of the bacterial flagellar motor. Authors: Jiaxing Tan / Xing Zhang / Xiaofei Wang / Caihuang Xu / Shenghai Chang / Hangjun Wu / Ting Wang / Huihui Liang / Haichun Gao / Yan Zhou / Yongqun Zhu / ![]() 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 ...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. | |||||||||||||||||||||
History |
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Structure visualization
Movie |
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Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 480.1 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 12.1 KB 12.1 KB | Display Display | ![]() |
Images | ![]() | 33.4 KB | ||
Filedesc metadata | ![]() | 5.1 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7cg4MC ![]() 7cblC ![]() 7cbmC ![]() 7cg0C ![]() 7cg7C ![]() 7cgbC ![]() 7cgoC ![]() 7e80C ![]() 7e81C ![]() 7e82C M: atomic model generated by this map C: citing same article ( |
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Similar structure data |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
File | ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Annotation | Density map of the flagellar export apparatus with FliE | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.307 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
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Sample components
-Entire : Flagellar motor-hook complex
Entire | Name: Flagellar motor-hook complex |
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Components |
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-Supramolecule #1: Flagellar motor-hook complex
Supramolecule | Name: Flagellar motor-hook complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all |
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Source (natural) | Organism: ![]() |
-Macromolecule #1: Flagellar hook-basal body complex protein FliE
Macromolecule | Name: Flagellar hook-basal body complex protein FliE / type: protein_or_peptide / ID: 1 / Number of copies: 6 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 11.087662 KDa |
Sequence | String: MAAIQGIEGV ISQLQATAMA ARGQDTHSQS TVSFAGQLHA ALDRISDRQA AARVQAEKFT LGEPGIALND VMADMQKASV SMQMGIQVR NKLVAAYQEV MSMQV UniProtKB: Flagellar hook-basal body complex protein FliE |
-Macromolecule #2: Flagellar biosynthetic protein FliP
Macromolecule | Name: Flagellar biosynthetic protein FliP / type: protein_or_peptide / ID: 2 / Number of copies: 5 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 26.801086 KDa |
Sequence | String: MRRLLFLSLA GLWLFSPAAA AQLPGLISQP LAGGGQSWSL SVQTLVFITS LTFLPAILLM MTSFTRIIIV FGLLRNALGT PSAPPNQVL LGLALFLTFF IMSPVIDKIY VDAYQPFSEQ KISMQEALDK GAQPLRAFML RQTREADLAL FARLANSGPL Q GPEAVPMR ...String: MRRLLFLSLA GLWLFSPAAA AQLPGLISQP LAGGGQSWSL SVQTLVFITS LTFLPAILLM MTSFTRIIIV FGLLRNALGT PSAPPNQVL LGLALFLTFF IMSPVIDKIY VDAYQPFSEQ KISMQEALDK GAQPLRAFML RQTREADLAL FARLANSGPL Q GPEAVPMR ILLPAYVTSE LKTAFQIGFT IFIPFLIIDL VIASVLMALG MMMVPPATIA LPFKLMLFVL VDGWQLLMGS LA QSFYS UniProtKB: Flagellar biosynthetic protein FliP |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Buffer | pH: 8 |
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Grid | Model: Quantifoil R1.2/1.3 / Material: COPPER / Mesh: 300 / Support film - Material: GRAPHENE OXIDE / Support film - topology: CONTINUOUS / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 120 sec. |
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 295 K / Instrument: FEI VITROBOT MARK IV / Details: blot for 6 seconds before plunging. |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: SUPER-RESOLUTION / Average electron dose: 47.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: OTHER / Imaging mode: BRIGHT FIELD |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
Startup model | Type of model: OTHER |
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Final reconstruction | Resolution.type: BY AUTHOR / Resolution: 3.6 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 148517 |
Initial angle assignment | Type: MAXIMUM LIKELIHOOD |
Final angle assignment | Type: MAXIMUM LIKELIHOOD |