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Open data
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Basic information
| Entry | Database: PDB / ID: 8x2u | ||||||
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| Title | Radial spoke head-neck dimer | ||||||
Components |
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Keywords | STRUCTURAL PROTEIN / radial spoke / cilia | ||||||
| Function / homology | Function and homology informationmaintenance of ciliary planar beating movement pattern / radial spoke head 1 / radial spoke head 2 / radial spoke head 3 / radial spoke assembly / radial spoke head / mating / axonemal central apparatus assembly / radial spoke / outer dense fiber ...maintenance of ciliary planar beating movement pattern / radial spoke head 1 / radial spoke head 2 / radial spoke head 3 / radial spoke assembly / radial spoke head / mating / axonemal central apparatus assembly / radial spoke / outer dense fiber / epithelial cilium movement involved in extracellular fluid movement / cilium movement involved in cell motility / sperm head-tail coupling apparatus / 9+2 motile cilium / axoneme assembly / cilium movement / kinocilium / ventricular system development / flagellated sperm motility / Set1C/COMPASS complex / UTP biosynthetic process / CTP biosynthetic process / meiotic spindle / nucleoside diphosphate kinase activity / motile cilium / GTP biosynthetic process / axoneme / cilium assembly / spermatid development / sperm flagellum / negative regulation of oxidative stress-induced intrinsic apoptotic signaling pathway / 3'-5' exonuclease activity / response to reactive oxygen species / condensed nuclear chromosome / meiotic cell cycle / establishment of localization in cell / unfolded protein binding / protein folding / Hydrolases; Acting on ester bonds / extracellular region / cytoplasm Similarity search - Function | ||||||
| Biological species | ![]() | ||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.57 Å | ||||||
Authors | Meng, X. / Cong, Y. | ||||||
| Funding support | China, 1items
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Citation | Journal: Nat Commun / Year: 2024Title: Multi-scale structures of the mammalian radial spoke and divergence of axonemal complexes in ependymal cilia. Authors: Xueming Meng / Cong Xu / Jiawei Li / Benhua Qiu / Jiajun Luo / Qin Hong / Yujie Tong / Chuyu Fang / Yanyan Feng / Rui Ma / Xiangyi Shi / Cheng Lin / Chen Pan / Xueliang Zhu / Xiumin Yan / Yao Cong / ![]() Abstract: Radial spokes (RS) transmit mechanochemical signals between the central pair (CP) and axonemal dynein arms to coordinate ciliary motility. Atomic-resolution structures of metazoan RS and structures ...Radial spokes (RS) transmit mechanochemical signals between the central pair (CP) and axonemal dynein arms to coordinate ciliary motility. Atomic-resolution structures of metazoan RS and structures of axonemal complexes in ependymal cilia, whose rhythmic beating drives the circulation of cerebrospinal fluid, however, remain obscure. Here, we present near-atomic resolution cryo-EM structures of mouse RS head-neck complex in both monomer and dimer forms and reveal the intrinsic flexibility of the dimer. We also map the genetic mutations related to primary ciliary dyskinesia and asthenospermia on the head-neck complex. Moreover, we present the cryo-ET and sub-tomogram averaging map of mouse ependymal cilia and build the models for RS1-3, IDAs, and N-DRC. Contrary to the conserved RS structure, our cryo-ET map reveals the lack of IDA-b/c/e and the absence of Tektin filaments within the A-tubule of doublet microtubules in ependymal cilia compared with mammalian respiratory cilia and sperm flagella, further exemplifying the structural diversity of mammalian motile cilia. Our findings shed light on the stepwise mammalian RS assembly mechanism, the coordinated rigid and elastic RS-CP interaction modes beneficial for the regulation of asymmetric ciliary beating, and also facilitate understanding on the etiology of ciliary dyskinesia-related ciliopathies and on the ependymal cilia in the development of hydrocephalus. | ||||||
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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 | 8x2u.cif.gz | 793.4 KB | Display | PDBx/mmCIF format |
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| PDB format | pdb8x2u.ent.gz | 618.4 KB | Display | PDB format |
| PDBx/mmJSON format | 8x2u.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Summary document | 8x2u_validation.pdf.gz | 850.4 KB | Display | wwPDB validaton report |
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| Full document | 8x2u_full_validation.pdf.gz | 880 KB | Display | |
| Data in XML | 8x2u_validation.xml.gz | 106.3 KB | Display | |
| Data in CIF | 8x2u_validation.cif.gz | 164.1 KB | Display | |
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/x2/8x2u ftp://data.pdbj.org/pub/pdb/validation_reports/x2/8x2u | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 38020MC ![]() 8wzbC C: citing same article ( M: map data used to model this data |
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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 , 4 types, 10 molecules ACBKEMFINQ
| #1: Protein | Mass: 18235.326 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() Homo sapiens (human) / References: UniProt: Q9D3X8#2: Protein | Mass: 40119.445 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() Homo sapiens (human) / References: UniProt: Q80Y75#4: Protein | Mass: 25547.516 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() Homo sapiens (human) / References: UniProt: Q99MH5#5: Protein | Mass: 35592.766 Da / Num. of mol.: 4 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() Homo sapiens (human) / References: UniProt: Q8VIG3 |
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-Radial spoke head protein ... , 3 types, 10 molecules DLGJORHcPd
| #3: Protein | Mass: 45234.270 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() Homo sapiens (human) / References: UniProt: Q9DA80#6: Protein | Mass: 80214.102 Da / Num. of mol.: 4 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() Homo sapiens (human) / References: UniProt: Q8BYM7#7: Protein | Mass: 31365.902 Da / Num. of mol.: 4 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() Homo sapiens (human) / References: UniProt: Q9D9V4 |
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-Experimental details
-Experiment
| Experiment | Method: ELECTRON MICROSCOPY |
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| EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
| Component | Name: Radial spoke head-neck dimer / Type: COMPLEX / Entity ID: all / Source: RECOMBINANT |
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| Source (natural) | Organism: ![]() |
| Source (recombinant) | Organism: Homo sapiens (human) |
| Buffer solution | pH: 7.5 |
| 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: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
| Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 2700 nm / Nominal defocus min: 1000 nm |
| Image recording | Electron dose: 54 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) |
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Processing
| CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION |
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| 3D reconstruction | Resolution: 3.57 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 338084 / Symmetry type: POINT |
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About Yorodumi






China, 1items
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Homo sapiens (human)
FIELD EMISSION GUN