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Yorodumi- PDB-9v10: Cryo-EM structure of the 48-nm repeat doublet microtubule from mo... -
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Basic information
| Entry | Database: PDB / ID: 9v10 | ||||||||||||||||||||||||
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| Title | Cryo-EM structure of the 48-nm repeat doublet microtubule from mouse sperm | ||||||||||||||||||||||||
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Keywords | STRUCTURAL PROTEIN / sperm flagellar doublet microtubules | ||||||||||||||||||||||||
| Function / homology | Function and homology informationprotein localization to motile cilium / axonemal microtubule doublet inner sheath / 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 / axonemal B tubule inner sheath ...protein localization to motile cilium / axonemal microtubule doublet inner sheath / 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 / axonemal B tubule inner sheath / axonemal A tubule inner sheath / outer dense fiber / Microtubule-dependent trafficking of connexons from Golgi to the plasma membrane / Cilium Assembly / Sealing of the nuclear envelope (NE) by ESCRT-III / protein polyglutamylation / left/right pattern formation / regulation of calcineurin-NFAT signaling cascade / sperm axoneme assembly / regulation of microtubule nucleation / Carboxyterminal post-translational modifications of tubulin / Intraflagellar transport / positive regulation of feeding behavior / COPI-independent Golgi-to-ER retrograde traffic / MAP kinase tyrosine/serine/threonine phosphatase activity / inner dynein arm assembly / cilium-dependent cell motility / cerebrospinal fluid circulation / regulation of cilium beat frequency involved in ciliary motility / epithelial cilium movement involved in extracellular fluid movement / HSP90 chaperone cycle for steroid hormone receptors (SHR) in the presence of ligand / 9+2 motile cilium / COPI-mediated anterograde transport / cilium movement involved in cell motility / intraciliary transport / regulation of store-operated calcium entry / Kinesins / acrosomal membrane / axoneme assembly / PKR-mediated signaling / cilium movement / left/right axis specification / Aggrephagy / RHO GTPases activate IQGAPs / microtubule sliding / Mitotic Prometaphase / EML4 and NUDC in mitotic spindle formation / Resolution of Sister Chromatid Cohesion / Recycling pathway of L1 / calcium ion sensor activity / The role of GTSE1 in G2/M progression after G2 checkpoint / sperm DNA condensation / COPI-dependent Golgi-to-ER retrograde traffic / axonemal microtubule / Hedgehog 'off' state / RHO GTPases Activate Formins / 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 / Separation of Sister Chromatids / cilium organization / Recruitment of NuMA to mitotic centrosomes / AURKA Activation by TPX2 / gamma-tubulin ring complex / manchette / Regulation of PLK1 Activity at G2/M Transition / positive regulation of cilium assembly / MHC class II antigen presentation / flagellated sperm motility / 3'-5'-DNA exonuclease activity / UTP biosynthetic process / CTP biosynthetic process / motile cilium / determination of left/right symmetry / DNA catabolic process / extrinsic component of membrane / nucleoside diphosphate kinase activity / protein targeting to membrane / : / positive regulation of cell motility / GTP biosynthetic process / intermediate filament / Hydrolases; Acting on ester bonds; Exodeoxyribonucleases producing 5'-phosphomonoesters / tubulin complex / protein-serine/threonine phosphatase / AMP binding / ciliary base / regulation of neuron projection development / protein serine/threonine phosphatase activity / receptor clustering / cerebral cortex cell migration / ciliary transition zone / phosphatase activity / mitotic cytokinesis / microtubule organizing center / cellular response to UV-C / cilium assembly / cellular response to unfolded protein / regulation of cell division Similarity search - Function | ||||||||||||||||||||||||
| Biological species | ![]() | ||||||||||||||||||||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.7 Å | ||||||||||||||||||||||||
Authors | Liu, Q. / Gui, M. / Wu, J.P. / Zhou, L.N. | ||||||||||||||||||||||||
| Funding support | China, 1items
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Citation | Journal: Nat Commun / Year: 2026Title: Doublet microtubule-associated tektins and enzymes differentially regulate sperm flagellar integrity and motility. Authors: Qi Liu / Lunni Zhou / Xiaochen Liang / Pengyu Chen / Bo Li / Shuo Yang / Yuqi Liu / Haibo Zhao / Jin Hu / Shan Feng / Shanshan Xie / Jianping Wu / Miao Gui / ![]() Abstract: Doublet microtubule (DMT)-associated proteins assemble and drive sperm flagella, which are essential for successful fertilization. However, the exact roles of different DMT-associated proteins in ...Doublet microtubule (DMT)-associated proteins assemble and drive sperm flagella, which are essential for successful fertilization. However, the exact roles of different DMT-associated proteins in sperm function and the underlying molecular mechanisms remain elusive. Here, we generate four gene-knockout mice based on high-resolution structures targeting distinct DMT components: two intermediate filament-like tektins (TEKT1, TEKT5) and two enzymes (TSSK6, DUSP21). The depletion of TEKT1, shared by sperm flagella and motile cilia, causes male infertility characterized by impaired sperm motility and loss of the tektin bundle, whereas sperm-specific Tekt5 knockout (KO) mice remain fertile with largely normal flagellar function, indicating functional divergence within the tektin family. Tssk6 KO spermatozoa exhibit severely disturbed morphology and motility, resulting in homozygote infertility and heterozygote subfertility. Phosphoproteomics reveals dysregulated phosphorylation of axonemal proteins, highlighting the critical role of kinase-mediated signaling in regulating sperm motility. Conversely, Dusp21 KO mice display no fertility or sperm motility defects, suggesting compensatory phosphatase activity. Phenotypic comparisons between Tekt1 and Tssk6 KO mice suggest their involvement in distinct subtypes of asthenozoospermia. Overall, this study elucidates how filamentous and enzymatic DMT proteins govern sperm function through divergent mechanisms, which have implications for molecular diagnosis of male infertility. | ||||||||||||||||||||||||
| History |
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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 | 9v10.cif.gz | 33.9 MB | Display | PDBx/mmCIF format |
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| PDB format | pdb9v10.ent.gz | Display | PDB format | |
| PDBx/mmJSON format | 9v10.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/v1/9v10 ftp://data.pdbj.org/pub/pdb/validation_reports/v1/9v10 | HTTPS FTP |
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-Related structure data
| Related structure data | ![]() 64679MC 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
+Cilia- and flagella-associated protein ... , 13 types, 37 molecules 07348AN1EFN2I1J1J2J3J4J5K1K2L1XBXCXDXEXFXGXHaa6bc...
+EF-hand domain-containing family member ... , 2 types, 6 molecules 12WXYZ
+Protein , 27 types, 481 molecules 56j1A0A1A2A3A4A5AAACAEAGAIAKAMAOBCBEBGBIBKBMBOCCCECGCICKCM...
+EF-hand calcium-binding domain-containing protein ... , 2 types, 6 molecules BaBbBci2i3i4
+Ciliary microtubule inner protein ... , 5 types, 26 molecules EaFaFbFcFdGaHIJKLMNO7O8O9P8P9Z2Z3Z4Z5M1M2M3M4
+Piercer of microtubule wall ... , 2 types, 2 molecules Gy
+Sperm-associated microtubule inner protein ... , 3 types, 10 molecules LaLba1a2a3a4h1h2h3h4
+Sperm microtubule inner protein ... , 4 types, 16 molecules NaNbNcNdNeOaObOcOdOeOfOgOhP1P2ke
+RIB43A-like with coiled-coils protein ... , 2 types, 5 molecules OPQRS
+Non-polymers , 4 types, 510 molecules 






+Details
-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: doublet microtubule of mouse sperm flagella / Type: COMPLEX / Entity ID: #1-#60 / Source: NATURAL |
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| Source (natural) | Organism: ![]() |
| Buffer solution | pH: 7.2 |
| 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: 2800 nm / Nominal defocus min: 1300 nm |
| Image recording | Electron dose: 50 e/Å2 / Film or detector model: FEI FALCON IV (4k x 4k) |
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Processing
| EM software | Name: PHENIX / Version: 1.20.1_4487: / Category: model refinement | ||||||||||||||||||||||||
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| CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
| 3D reconstruction | Resolution: 3.7 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 83043 / Symmetry type: POINT | ||||||||||||||||||||||||
| Refine LS restraints |
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China, 1items
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FIELD EMISSION GUN