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Yorodumi- PDB-9cpb: Atomic model of bovine Fallopian tube cilia doublet microtubule (... -
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Open data
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Basic information
| Entry | Database: PDB / ID: 9cpb | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Title | Atomic model of bovine Fallopian tube cilia doublet microtubule (48-nm periodicity) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Keywords | STRUCTURAL PROTEIN / axoneme / cilia / microtubule / dynein / Fallopian tube / doublet microtubule (DMT) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Function / homology | Function and homology informationouter dynein arm docking complex / protein localization to motile cilium / Microtubule-dependent trafficking of connexons from Golgi to the plasma membrane / Cilium Assembly / : / Sealing of the nuclear envelope (NE) by ESCRT-III / Kinesins / regulation of cilium movement / mucociliary clearance / Mitotic Prometaphase ...outer dynein arm docking complex / protein localization to motile cilium / Microtubule-dependent trafficking of connexons from Golgi to the plasma membrane / Cilium Assembly / : / Sealing of the nuclear envelope (NE) by ESCRT-III / Kinesins / regulation of cilium movement / mucociliary clearance / Mitotic Prometaphase / outer acrosomal membrane / epithelial cilium movement involved in determination of left/right asymmetry / regulation of brood size / establishment of left/right asymmetry / 9+0 motile cilium / sperm flagellum assembly / manchette assembly / COPI-dependent Golgi-to-ER retrograde traffic / axonemal B tubule inner sheath / axonemal A tubule inner sheath / RHO GTPases activate IQGAPs / regulation of flagellated sperm motility / RHO GTPases Activate Formins / protein polyglutamylation / regulation of calcineurin-NFAT signaling cascade / Intraflagellar transport / positive regulation of feeding behavior / Resolution of Sister Chromatid Cohesion / EML4 and NUDC in mitotic spindle formation / outer dynein arm assembly / COPI-independent Golgi-to-ER retrograde traffic / COPI-mediated anterograde transport / cerebrospinal fluid circulation / inner dynein arm assembly / cilium-dependent cell motility / 9+2 motile cilium / regulation of cilium beat frequency involved in ciliary motility / 9+0 non-motile cilium / MHC class II antigen presentation / cilium movement involved in cell motility / HSP90 chaperone cycle for steroid hormone receptors (SHR) in the presence of ligand / The role of GTSE1 in G2/M progression after G2 checkpoint / acrosomal membrane / regulation of store-operated calcium entry / cilium movement / regulation of cilium assembly / axoneme assembly / Aggrephagy / Separation of Sister Chromatids / calcium ion sensor activity / Loss of Nlp from mitotic centrosomes / Recruitment of mitotic centrosome proteins and complexes / Loss of proteins required for interphase microtubule organization from the centrosome / Anchoring of the basal body to the plasma membrane / AURKA Activation by TPX2 / axonemal microtubule / Recruitment of NuMA to mitotic centrosomes / cilium organization / Regulation of PLK1 Activity at G2/M Transition / gamma-tubulin ring complex / Hedgehog 'off' state / ciliary rootlet / manchette / determination of left/right symmetry / 3'-5'-DNA exonuclease activity / UTP biosynthetic process / CTP biosynthetic process / motile cilium / DNA catabolic process / Neutrophil degranulation / nucleoside diphosphate kinase activity / single fertilization / positive regulation of cell motility / regulation of neuron projection development / GTP biosynthetic process / Hydrolases; Acting on ester bonds; Exodeoxyribonucleases producing 5'-phosphomonoesters / cerebral cortex cell migration / AMP binding / flagellated sperm motility / spermatid development / ciliary transition zone / ciliary base / intercellular bridge / microtubule organizing center / mitotic cytokinesis / cellular response to UV-C / regulation of signal transduction / regulation of cell division / cilium assembly / glial cell projection / axoneme / lung development / centriolar satellite / sperm flagellum / alpha-tubulin binding / beta-tubulin binding / cytoplasmic microtubule / ciliary tip / centriole / acrosomal vesicle Similarity search - Function | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Biological species | ![]() | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.52 Å | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Authors | Sun, C. / Zeng, J. / Zhang, R. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Funding support | United States, 1items
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Citation | Journal: Nature / Year: 2025Title: Structural diversity of axonemes across mammalian motile cilia. Authors: Miguel Ricardo Leung / Chen Sun / Jianwei Zeng / Jacob R Anderson / Qingwei Niu / Wei Huang / Willem E M Noteborn / Alan Brown / Tzviya Zeev-Ben-Mordehai / Rui Zhang / ![]() Abstract: Reproduction, development and homeostasis depend on motile cilia, whose rhythmic beating is powered by a microtubule-based molecular machine called the axoneme. Although an atomic model of the ...Reproduction, development and homeostasis depend on motile cilia, whose rhythmic beating is powered by a microtubule-based molecular machine called the axoneme. Although an atomic model of the axoneme is available for the alga Chlamydomonas reinhardtii, structures of mammalian axonemes are incomplete. Furthermore, we do not fully understand how molecular structures of axonemes vary across motile-ciliated cell types in the body. Here we use cryoelectron microscopy, cryoelectron tomography and proteomics to resolve the 96-nm modular repeat of axonemal doublet microtubules (DMTs) from both sperm flagella and epithelial cilia of the oviduct, brain ventricles and respiratory tract. We find that sperm DMTs are the most specialized, with epithelial cilia having only minor differences across tissues. We build a model of the mammalian sperm DMT, defining the positions and interactions of 181 proteins including 34 newly identified proteins. We elucidate the composition of radial spoke 3 and uncover binding sites of kinases associated with regeneration of ATP and regulation of ciliary motility. We discover a sperm-specific, axoneme-tethered T-complex protein ring complex (TRiC) chaperone that may contribute to construction or maintenance of the long flagella of mammalian sperm. We resolve axonemal dyneins in their prestroke states, illuminating conformational changes that occur during ciliary movement. Our results illustrate how elements of chemical and mechanical regulation are embedded within the axoneme, providing valuable resources for understanding the aetiology of ciliopathy and infertility, and exemplifying the discovery power of modern structural biology. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Structure visualization
| Structure viewer | Molecule: Molmil Jmol/JSmol |
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Downloads & links
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Download
| PDBx/mmCIF format | 9cpb.cif.gz | 24 MB | Display | PDBx/mmCIF format |
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| PDB format | pdb9cpb.ent.gz | Display | PDB format | |
| PDBx/mmJSON format | 9cpb.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/cp/9cpb ftp://data.pdbj.org/pub/pdb/validation_reports/cp/9cpb | HTTPS FTP |
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-Related structure data
| Related structure data | ![]() 45801MC ![]() 9cpcC ![]() 9fqrC M: map data used to model this data C: citing same article ( |
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| Similar structure data | Similarity search - Function & homology F&H Search |
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Links
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Assembly
| Deposited unit | ![]()
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Components
+Protein , 29 types, 357 molecules 1A1K1L1N1O1P1R2F2G2H2S2T3A3C3D3F3H3N3O3P3Q3S3T3U3V3X3Y3Z4A4B...
-Coiled-coil domain containing ... , 2 types, 5 molecules 1D1E1F1H1I
| #2: Protein | Mass: 77675.969 Da / Num. of mol.: 3 / Source method: isolated from a natural source / Source: (natural) ![]() #3: Protein | Mass: 65437.598 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) ![]() |
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-Cilia and flagella associated protein ... , 5 types, 15 molecules 1T1U2J2K2L2M2O2P2Q2V2W2X2Y7K7L
| #7: Protein | Mass: 36519.594 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) ![]() #11: Protein | Mass: 65800.328 Da / Num. of mol.: 4 / Source method: isolated from a natural source / Source: (natural) ![]() #12: Protein | Mass: 68719.602 Da / Num. of mol.: 3 / Source method: isolated from a natural source / Source: (natural) ![]() #14: Protein | Mass: 32999.203 Da / Num. of mol.: 4 / Source method: isolated from a natural source / Source: (natural) ![]() #39: Protein | Mass: 16820.848 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) ![]() |
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-Cilia- and flagella-associated protein ... , 2 types, 7 molecules 1W1X1Y1Z2A2B4D
| #8: Protein | Mass: 22781.389 Da / Num. of mol.: 6 / Source method: isolated from a natural source / Source: (natural) ![]() #23: Protein | | Mass: 16178.324 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
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-EF-hand domain ... , 2 types, 5 molecules 2D2E3J3K3L
| #9: Protein | Mass: 97960.547 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) ![]() #19: Protein | Mass: 74125.344 Da / Num. of mol.: 3 / Source method: isolated from a natural source / Source: (natural) ![]() |
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-Ciliary microtubule associated protein ... , 2 types, 6 molecules 7C7D7E7F7H7I
| #37: Protein | Mass: 27684.936 Da / Num. of mol.: 4 / Source method: isolated from a natural source / Source: (natural) ![]() #38: Protein | Mass: 30860.854 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) ![]() |
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-Non-polymers , 3 types, 370 molecules 




| #43: Chemical | ChemComp-GDP / #44: Chemical | ChemComp-MG / #45: Chemical | ChemComp-GTP / |
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-Details
| Has ligand of interest | Y |
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| Has protein modification | N |
-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: bovine fallopian tube cilia / Type: ORGANELLE OR CELLULAR COMPONENT / Entity ID: #1-#42 / Source: NATURAL |
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| Molecular weight | Experimental value: NO |
| 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: TFS KRIOS |
| Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
| Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 2500 nm / Nominal defocus min: 500 nm |
| Image recording | Electron dose: 50 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) |
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Processing
| CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION |
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| 3D reconstruction | Resolution: 3.52 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 153589 / Symmetry type: POINT |
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FIELD EMISSION GUN