+Open data
-Basic information
Entry | Database: PDB / ID: 7mwg | ||||||
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Title | 16-nm repeat microtubule doublet | ||||||
Components |
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Keywords | STRUCTURAL PROTEIN / microtubule doublet | ||||||
Function / homology | Function and homology information Hydrolases; Acting on acid anhydrides; Acting on GTP to facilitate cellular and subcellular movement / structural constituent of cytoskeleton / microtubule cytoskeleton organization / mitotic cell cycle / microtubule / hydrolase activity / GTPase activity / GTP binding / metal ion binding / cytoplasm Similarity search - Function | ||||||
Biological species | Tetrahymena thermophila (eukaryote) | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.5 Å | ||||||
Authors | Rao, Q. / Zhang, K. | ||||||
Citation | Journal: Nat Struct Mol Biol / Year: 2021 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
Movie |
Movie viewer |
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Structure viewer | Molecule: MolmilJmol/JSmol |
-Downloads & links
-Download
PDBx/mmCIF format | 7mwg.cif.gz | 162.4 KB | Display | PDBx/mmCIF format |
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PDB format | pdb7mwg.ent.gz | 126.3 KB | Display | PDB format |
PDBx/mmJSON format | 7mwg.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Summary document | 7mwg_validation.pdf.gz | 1.1 MB | Display | wwPDB validaton report |
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Full document | 7mwg_full_validation.pdf.gz | 1.2 MB | Display | |
Data in XML | 7mwg_validation.xml.gz | 33.7 KB | Display | |
Data in CIF | 7mwg_validation.cif.gz | 48.7 KB | Display | |
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/mw/7mwg ftp://data.pdbj.org/pub/pdb/validation_reports/mw/7mwg | HTTPS FTP |
-Related structure data
Related structure data | 24066MC 7k58C 7k5bC 7kekC 7n32C M: map data used to model this data C: citing same article (ref.) |
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Similar structure data |
-Links
-Assembly
Deposited unit |
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1 |
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-Components
-Protein , 2 types, 2 molecules AB
#1: Protein | Mass: 49639.035 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Tetrahymena thermophila (eukaryote) / References: UniProt: P41351 |
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#2: Protein | Mass: 49617.676 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Tetrahymena thermophila (eukaryote) / References: UniProt: P41352 |
-Non-polymers , 4 types, 12 molecules
#3: Chemical | ChemComp-GTP / |
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#4: Chemical | ChemComp-MG / |
#5: Chemical | ChemComp-GDP / |
#6: Water | ChemComp-HOH / |
-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 |
-Sample preparation
Component | Name: 16-nm repeat microtubule doublet / Type: COMPLEX / Entity ID: #1-#2 / Source: NATURAL |
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Source (natural) | Organism: Tetrahymena thermophila (eukaryote) |
Buffer solution | pH: 7.4 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Vitrification | Cryogen name: ETHANE |
-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: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
Electron lens | Mode: BRIGHT FIELD |
Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
Image recording | Electron dose: 53.3 e/Å2 / Film or detector model: GATAN K2 QUANTUM (4k x 4k) |
-Processing
Software | Name: PHENIX / Version: 1.17_3644: / Classification: refinement | ||||||||||||||||||||||||
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CTF correction | Type: NONE | ||||||||||||||||||||||||
3D reconstruction | Resolution: 3.5 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 118333 / Symmetry type: POINT | ||||||||||||||||||||||||
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