+Open data
-Basic information
Entry | Database: PDB / ID: 7kzn | ||||||
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Title | Outer dynein arm core subcomplex from C. reinhardtii | ||||||
Components |
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Keywords | MOTOR PROTEIN / dynein / microtubule / cilia | ||||||
Function / homology | Function and homology information outer dynein arm / axonemal dynein complex / outer dynein arm assembly / cilium movement involved in cell motility / 9+2 motile cilium / motile cilium assembly / dynein complex / cell projection organization / minus-end-directed microtubule motor activity / cytoplasmic dynein complex ...outer dynein arm / axonemal dynein complex / outer dynein arm assembly / cilium movement involved in cell motility / 9+2 motile cilium / motile cilium assembly / dynein complex / cell projection organization / minus-end-directed microtubule motor activity / cytoplasmic dynein complex / dynein light intermediate chain binding / ciliary plasm / motile cilium / dynein intermediate chain binding / microtubule-based movement / axoneme / microtubule-based process / microtubule / calcium ion binding / ATP hydrolysis activity / ATP binding / cytoplasm Similarity search - Function | ||||||
Biological species | Chlamydomonas reinhardtii (plant) | ||||||
Method | ELECTRON MICROSCOPY / helical reconstruction / cryo EM / Resolution: 4 Å | ||||||
Authors | Walton, T. / Wu, H. / Brown, A.B. | ||||||
Citation | Journal: Nat Commun / Year: 2021 Title: Structure of a microtubule-bound axonemal dynein. Authors: Travis Walton / Hao Wu / Alan Brown / Abstract: Axonemal dyneins are tethered to doublet microtubules inside cilia to drive ciliary beating, a process critical for cellular motility and extracellular fluid flow. Axonemal dyneins are evolutionarily ...Axonemal dyneins are tethered to doublet microtubules inside cilia to drive ciliary beating, a process critical for cellular motility and extracellular fluid flow. Axonemal dyneins are evolutionarily and biochemically distinct from cytoplasmic dyneins that transport cargo, and the mechanisms regulating their localization and function are poorly understood. Here, we report a single-particle cryo-EM reconstruction of a three-headed axonemal dynein natively bound to doublet microtubules isolated from cilia. The slanted conformation of the axonemal dynein causes interaction of its motor domains with the neighboring dynein complex. Our structure shows how a heterotrimeric docking complex specifically localizes the linear array of axonemal dyneins to the doublet microtubule by directly interacting with the heavy chains. Our structural analysis establishes the arrangement of conserved heavy, intermediate and light chain subunits, and provides a framework to understand the roles of individual subunits and the interactions between dyneins during ciliary waveform generation. | ||||||
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 | 7kzn.cif.gz | 953.8 KB | Display | PDBx/mmCIF format |
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PDB format | pdb7kzn.ent.gz | 625.5 KB | Display | PDB format |
PDBx/mmJSON format | 7kzn.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Summary document | 7kzn_validation.pdf.gz | 1.1 MB | Display | wwPDB validaton report |
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Full document | 7kzn_full_validation.pdf.gz | 1.1 MB | Display | |
Data in XML | 7kzn_validation.xml.gz | 106.6 KB | Display | |
Data in CIF | 7kzn_validation.cif.gz | 169.3 KB | Display | |
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/kz/7kzn ftp://data.pdbj.org/pub/pdb/validation_reports/kz/7kzn | HTTPS FTP |
-Related structure data
Related structure data | 23083MC 7kzmC 7kzoC 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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-Components
-Protein , 10 types, 13 molecules ACDEGHKLMNXYZ
#1: Protein | Mass: 504949.312 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Chlamydomonas reinhardtii (plant) / References: UniProt: A0A2K3DV97 | ||||||
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#3: Protein | Mass: 513491.406 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Chlamydomonas reinhardtii (plant) / References: UniProt: Q39575 | ||||||
#4: Protein | Mass: 76628.680 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Chlamydomonas reinhardtii (plant) / References: UniProt: Q39578 | ||||||
#5: Protein | Mass: 63594.062 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Chlamydomonas reinhardtii (plant) / References: UniProt: P27766 | ||||||
#7: Protein | Mass: 17807.119 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Chlamydomonas reinhardtii (plant) / References: UniProt: Q39584 | ||||||
#8: Protein | Mass: 13876.627 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Chlamydomonas reinhardtii (plant) / References: UniProt: Q39579 | ||||||
#11: Protein | Mass: 10336.775 Da / Num. of mol.: 4 / Source method: isolated from a natural source / Source: (natural) Chlamydomonas reinhardtii (plant) / References: UniProt: Q39580 #14: Protein | | Mass: 10315.707 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Chlamydomonas reinhardtii (plant) #15: Protein | | Mass: 14315.630 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Chlamydomonas reinhardtii (plant) #16: Protein | | Mass: 21371.311 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Chlamydomonas reinhardtii (plant) / References: UniProt: Q7Y0H2 |
-Dynein light chain ... , 4 types, 4 molecules IJOP
#9: Protein | Mass: 11946.708 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Chlamydomonas reinhardtii (plant) / References: UniProt: Q9SWQ6 |
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#10: Protein | Mass: 11132.679 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Chlamydomonas reinhardtii (plant) / References: UniProt: A8IY95 |
#12: Protein | Mass: 12993.606 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Chlamydomonas reinhardtii (plant) / References: UniProt: Q2VIY5 |
#13: Protein | Mass: 12101.117 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Chlamydomonas reinhardtii (plant) / References: UniProt: A8J5C4 |
-Antibody / Flagellar outer dynein arm ... , 2 types, 2 molecules BF
#2: Antibody | Mass: 520510.906 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Chlamydomonas reinhardtii (plant) / References: UniProt: A8J1M5 |
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#6: Protein | Mass: 15903.028 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Chlamydomonas reinhardtii (plant) / References: UniProt: O04355 |
-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: FILAMENT / 3D reconstruction method: helical reconstruction |
-Sample preparation
Component | Name: ODA core subcomplex / Type: COMPLEX Details: IC-LC block with partial N-terminal tails of the heavy chains Entity ID: all / Source: NATURAL | |||||||||||||||||||||||||||||||||||
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Molecular weight | Experimental value: NO | |||||||||||||||||||||||||||||||||||
Source (natural) | Organism: Chlamydomonas reinhardtii (plant) | |||||||||||||||||||||||||||||||||||
Buffer solution | pH: 7.4 Details: Buffer also contained 1x Protease Arrest (G-Biosciences) | |||||||||||||||||||||||||||||||||||
Buffer component |
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Specimen | Conc.: 20 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES Details: Splayed axonemes isolated from Chlamydomonas reinhardtii flagella. | |||||||||||||||||||||||||||||||||||
Specimen support | Details: 15 mA / Grid material: COPPER / Grid mesh size: 400 divisions/in. / Grid type: C-flat-1.2/1.3 | |||||||||||||||||||||||||||||||||||
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 298 K Details: 2.5 ul of splayed axoneme solution was then dispensed onto glow-discharged C-Flat 1.2/1.3-4Cu grids inside a Vitrobot Mark IV under 100% humidity. After a 10 s delay time, cryo-EM samples ...Details: 2.5 ul of splayed axoneme solution was then dispensed onto glow-discharged C-Flat 1.2/1.3-4Cu grids inside a Vitrobot Mark IV under 100% humidity. After a 10 s delay time, cryo-EM samples were prepared by first blotting for 10 s with blot force set to 16 and immediately plunged into liquid ethane. |
-Electron microscopy imaging
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: TFS KRIOS |
Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
Electron lens | Mode: BRIGHT FIELD / Cs: 2.7 mm / C2 aperture diameter: 50 µm / Alignment procedure: COMA FREE |
Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
Image recording | Average exposure time: 3.7 sec. / Electron dose: 61.48 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Num. of grids imaged: 2 / Num. of real images: 20524 |
EM imaging optics | Energyfilter name: GIF Bioquantum / Energyfilter slit width: 25 eV |
-Processing
EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||||||
Helical symmerty | Angular rotation/subunit: 0 ° / Axial rise/subunit: 82 Å / Axial symmetry: C1 | ||||||||||||||||||||||||||||||||||||||||
Particle selection | Num. of particles selected: 5584147 | ||||||||||||||||||||||||||||||||||||||||
3D reconstruction | Resolution: 4 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 485694 Details: The composite map was generated from three focused refinements of the full ODA core map. The three focused refinements centered on IC1-LC7a/b (3.6 A resolution), IC2 (3.5 A resolution), and ...Details: The composite map was generated from three focused refinements of the full ODA core map. The three focused refinements centered on IC1-LC7a/b (3.6 A resolution), IC2 (3.5 A resolution), and the LC8s (4.0 A resolution). Symmetry type: HELICAL | ||||||||||||||||||||||||||||||||||||||||
Atomic model building | Protocol: OTHER / Space: REAL / Target criteria: Correlation coefficient |