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Open data
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Basic information
| Entry | Database: PDB / ID: 7eeb | ||||||
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| Title | Structure of the CatSpermasome | ||||||
Components |
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Keywords | PROTEIN TRANSPORT / ion channel / membrane protein / calcium channel / protein complex | ||||||
| Function / homology | Function and homology informationCatSper complex / Sperm Motility And Taxes / fusion of sperm to egg plasma membrane involved in single fertilization / sperm principal piece / regulation of cilium beat frequency involved in ciliary motility / calcium ion sensor activity / male meiotic nuclear division / flagellated sperm motility / organic anion transport / : ...CatSper complex / Sperm Motility And Taxes / fusion of sperm to egg plasma membrane involved in single fertilization / sperm principal piece / regulation of cilium beat frequency involved in ciliary motility / calcium ion sensor activity / male meiotic nuclear division / flagellated sperm motility / organic anion transport / : / calcium-activated cation channel activity / fertilization / motile cilium / sodium ion transport / sperm capacitation / regulation of calcium ion transport / monoatomic ion channel complex / sperm flagellum / voltage-gated calcium channel activity / acrosomal vesicle / bioluminescence / generation of precursor metabolites and energy / establishment of localization in cell / calcium ion transport / spermatogenesis / cell differentiation / calmodulin binding / cilium / calcium ion binding / endoplasmic reticulum / plasma membrane / cytoplasm Similarity search - Function | ||||||
| Biological species | ![]() Human cytomegalovirus![]() | ||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.9 Å | ||||||
Authors | Wu, J.P. / Ke, M. | ||||||
Citation | Journal: Nature / Year: 2021Title: Structure of a mammalian sperm cation channel complex. Authors: Shiyi Lin / Meng Ke / Yuqi Zhang / Zhen Yan / Jianping Wu / ![]() Abstract: The cation channel of sperm (CatSper) is essential for sperm motility and fertility. CatSper comprises the pore-forming proteins CATSPER1-4 and multiple auxiliary subunits, including CATSPERβ, γ, ...The cation channel of sperm (CatSper) is essential for sperm motility and fertility. CatSper comprises the pore-forming proteins CATSPER1-4 and multiple auxiliary subunits, including CATSPERβ, γ, δ, ε, ζ, and EFCAB9. Here we report the cryo-electron microscopy (cryo-EM) structure of the CatSper complex isolated from mouse sperm. In the extracellular view, CATSPER1-4 conform to the conventional domain-swapped voltage-gated ion channel fold, following a counterclockwise arrangement. The auxiliary subunits CATSPERβ, γ, δ and ε-each of which contains a single transmembrane segment and a large extracellular domain-constitute a pavilion-like structure that stabilizes the entire complex through interactions with CATSPER4, 1, 3 and 2, respectively. Our EM map reveals several previously uncharacterized components, exemplified by the organic anion transporter SLCO6C1. We name this channel-transporter ultracomplex the CatSpermasome. The assembly and organization details of the CatSpermasome presented here lay the foundation for the development of CatSpermasome-related treatments for male infertility and non-hormonal contraceptives. | ||||||
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Structure visualization
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| Structure viewer | Molecule: Molmil Jmol/JSmol |
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Downloads & links
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Download
| PDBx/mmCIF format | 7eeb.cif.gz | 1.1 MB | Display | PDBx/mmCIF format |
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| PDB format | pdb7eeb.ent.gz | 877.6 KB | Display | PDB format |
| PDBx/mmJSON format | 7eeb.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Summary document | 7eeb_validation.pdf.gz | 2.3 MB | Display | wwPDB validaton report |
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| Full document | 7eeb_full_validation.pdf.gz | 2.4 MB | Display | |
| Data in XML | 7eeb_validation.xml.gz | 171.5 KB | Display | |
| Data in CIF | 7eeb_validation.cif.gz | 258.1 KB | Display | |
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/ee/7eeb ftp://data.pdbj.org/pub/pdb/validation_reports/ee/7eeb | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 31076MC M: map data used to model this data C: citing same article ( |
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| Similar structure data |
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Links
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Assembly
| Deposited unit | ![]()
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| 1 |
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Components
-Protein , 3 types, 3 molecules ALI
| #1: Protein | Mass: 109442.758 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() Human cytomegalovirus, (gene. exp.) ![]() Gene: egfp, Catsper1 / Production host: ![]() |
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| #9: Protein | Mass: 79055.258 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #13: Protein | Mass: 26170.482 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
-Cation channel sperm-associated protein ... , 8 types, 8 molecules BCDEFGHK
| #2: Protein | Mass: 68651.062 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
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| #3: Protein | Mass: 45533.113 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #4: Protein | Mass: 51179.273 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #5: Protein | Mass: 126250.031 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #6: Protein | Mass: 131550.594 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #7: Protein | Mass: 91186.453 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #8: Protein | Mass: 113913.453 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
| #14: Protein | Mass: 22776.598 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
-Transmembrane protein ... , 2 types, 2 molecules JM
| #10: Protein | Mass: 19918.379 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
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| #11: Protein | Mass: 13489.028 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
-Protein/peptide , 1 types, 1 molecules N
| #12: Protein/peptide | Mass: 2400.951 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
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-Sugars , 6 types, 25 molecules 
| #15: Polysaccharide | beta-D-mannopyranose-(1-2)-beta-D-mannopyranose-(1-3)-[beta-D-mannopyranose-(1-3)-beta-D- ...beta-D-mannopyranose-(1-2)-beta-D-mannopyranose-(1-3)-[beta-D-mannopyranose-(1-3)-beta-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose Source method: isolated from a genetically manipulated source | ||||||||
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| #16: Polysaccharide | 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose Source method: isolated from a genetically manipulated source #17: Polysaccharide | beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta- ...beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose Source method: isolated from a genetically manipulated source #18: Polysaccharide | Source method: isolated from a genetically manipulated source #19: Polysaccharide | beta-D-mannopyranose-(1-3)-[beta-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-6)-[beta-D- ...beta-D-mannopyranose-(1-3)-[beta-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-6)-[beta-D-mannopyranose-(1-3)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose | Source method: isolated from a genetically manipulated source #22: Sugar | ChemComp-NAG / |
-Non-polymers , 2 types, 5 molecules 


| #20: Chemical | | #21: Chemical | |
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-Details
| Has ligand of interest | N |
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| Has protein modification | Y |
-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: mouse CatSpermasome / Type: COMPLEX / Entity ID: #1-#14 / Source: NATURAL |
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| Molecular weight | Experimental value: NO |
| Source (natural) | Organism: ![]() |
| Buffer solution | pH: 7 |
| Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
| Specimen support | Grid material: COPPER / Grid mesh size: 400 divisions/in. / Grid type: Homemade |
| Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 281 K / Details: blot for 8 s before plunging |
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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 magnification: 81000 X / Nominal defocus max: 2500 nm / Nominal defocus min: 1500 nm / Cs: 2.7 mm / C2 aperture diameter: 50 µm |
| Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
| Image recording | Electron dose: 50 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) |
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Processing
| EM software | Name: cryoSPARC / Version: v3.0 / Category: CTF correction |
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| CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION |
| 3D reconstruction | Resolution: 2.9 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 560730 / Symmetry type: POINT |
| Refinement | Highest resolution: 2.9 Å |
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Human cytomegalovirus

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UCSF Chimera








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