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- PDB-7k5b: Structure of outer-arm dynein bound to microtubule doublet in mic... -
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Basic information
Entry | Database: PDB / ID: 7k5b | ||||||
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Title | Structure of outer-arm dynein bound to microtubule doublet in microtubule binding state 2 (MTBS-2) | ||||||
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![]() | MOTOR PROTEIN / three head / outer dynein arms / microtubule binding | ||||||
Function / homology | ![]() outer dynein arm / outer dynein arm assembly / dynein light chain binding / cilium movement / dynein heavy chain binding / axonemal dynein complex / dynein complex / minus-end-directed microtubule motor activity / cytoplasmic dynein complex / dynein light intermediate chain binding ...outer dynein arm / outer dynein arm assembly / dynein light chain binding / cilium movement / dynein heavy chain binding / axonemal dynein complex / dynein complex / minus-end-directed microtubule motor activity / cytoplasmic dynein complex / dynein light intermediate chain binding / motile cilium / dynein intermediate chain binding / microtubule-based movement / microtubule-based process / alpha-tubulin binding / microtubule / calcium ion binding / ATP hydrolysis activity / ATP binding / cytoplasm Similarity search - Function | ||||||
Biological species | ![]() ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.5 Å | ||||||
![]() | Rao, Q. / Zhang, K. | ||||||
![]() | ![]() Title: Structures of outer-arm dynein array on microtubule doublet reveal a motor coordination mechanism. Authors: Qinhui Rao / Long Han / Yue Wang / Pengxin Chai / Yin-Wei Kuo / Renbin Yang / Fangheng Hu / Yuchen Yang / Jonathon Howard / Kai Zhang / ![]() Abstract: Thousands of outer-arm dyneins (OADs) are arrayed in the axoneme to drive a rhythmic ciliary beat. Coordination among multiple OADs is essential for generating mechanical forces to bend microtubule ...Thousands of outer-arm dyneins (OADs) are arrayed in the axoneme to drive a rhythmic ciliary beat. Coordination among multiple OADs is essential for generating mechanical forces to bend microtubule doublets (MTDs). Using electron microscopy, we determined high-resolution structures of Tetrahymena thermophila OAD arrays bound to MTDs in two different states. OAD preferentially binds to MTD protofilaments with a pattern resembling the native tracks for its distinct microtubule-binding domains. Upon MTD binding, free OADs are induced to adopt a stable parallel conformation, primed for array formation. Extensive tail-to-head (TTH) interactions between OADs are observed, which need to be broken for ATP turnover by the dynein motor. We propose that OADs in an array sequentially hydrolyze ATP to slide the MTDs. ATP hydrolysis in turn relaxes the TTH interfaces to effect free nucleotide cycles of downstream OADs. These findings lead to a model explaining how conformational changes in the axoneme produce coordinated action of dyneins. | ||||||
History |
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Structure visualization
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Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 2.9 MB | Display | ![]() |
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PDB format | ![]() | Display | ![]() | |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 1.3 MB | Display | ![]() |
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Full document | ![]() | 2.1 MB | Display | |
Data in XML | ![]() | 461.6 KB | Display | |
Data in CIF | ![]() | 682.9 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 22679MC ![]() 7k58C ![]() 7kekC ![]() 7mwgC ![]() 7n32C M: map data used to model this data C: citing same article ( |
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Similar structure data |
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Links
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Assembly
Deposited unit | ![]()
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Components
-Protein , 5 types, 5 molecules ACDEP
#1: Protein | Mass: 533780.188 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
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#3: Protein | Mass: 450623.219 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#4: Protein | Mass: 69514.820 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#5: Protein | Mass: 63702.582 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#16: Protein | Mass: 12987.904 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
-Dynein light ... , 12 types, 12 molecules FGHIJKLMNOQR
#6: Protein | Mass: 14193.171 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
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#7: Protein | Mass: 17470.111 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#8: Protein | Mass: 10649.161 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#9: Protein | Mass: 11830.534 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#10: Protein | Mass: 11435.072 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#11: Protein | Mass: 10670.071 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#12: Protein | Mass: 12516.457 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#13: Protein | Mass: 10453.167 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#14: Protein | Mass: 12856.455 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#15: Protein | Mass: 14117.313 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#17: Protein | Mass: 21705.334 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#18: Protein | Mass: 16803.703 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
-Antibody , 1 types, 1 molecules B
#2: Antibody | Mass: 529207.188 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
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-Non-polymers , 3 types, 18 molecules ![](data/chem/img/ADP.gif)
![](data/chem/img/ATP.gif)
![](data/chem/img/MG.gif)
![](data/chem/img/ATP.gif)
![](data/chem/img/MG.gif)
#19: Chemical | ChemComp-ADP / #20: Chemical | #21: Chemical | ChemComp-MG / |
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-Details
Has ligand of interest | N |
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-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: FILAMENT / 3D reconstruction method: single particle reconstruction |
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Sample preparation
Component | Name: Outer-arm dynein bound to microtubule doublet in microtubule binding state 2 (MTBS-2) Type: COMPLEX / Entity ID: #1-#18 / Source: NATURAL |
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Source (natural) | Organism: ![]() ![]() |
Buffer solution | pH: 7.4 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Vitrification | Cryogen name: ETHANE |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD |
Image recording | Electron dose: 53.3 e/Å2 / Film or detector model: GATAN K2 QUANTUM (4k x 4k) |
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Processing
CTF correction | Type: NONE |
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3D reconstruction | Resolution: 4.5 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 76936 / Symmetry type: POINT |