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Open data
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Basic information
Entry | Database: PDB / ID: 3izx | ||||||
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Title | 3.1 Angstrom cryoEM structure of cytoplasmic polyhedrosis virus | ||||||
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![]() | VIRUS / cytoplasmic polyhedrosis virus / 3D reconstruction / cryoEM / full atom model | ||||||
Function / homology | ![]() | ||||||
Biological species | ![]() ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.1 Å | ||||||
![]() | Yu, X. / Ge, P. / Jiang, J. / Atanasov, I. / Zhou, Z.H. | ||||||
![]() | ![]() Title: Atomic model of CPV reveals the mechanism used by this single-shelled virus to economically carry out functions conserved in multishelled reoviruses. Authors: Xuekui Yu / Peng Ge / Jiansen Jiang / Ivo Atanasov / Z Hong Zhou / ![]() Abstract: Unlike the multishelled viruses in the Reoviridae, cytoplasmic polyhedrosis virus (CPV) is single shelled, yet stable and fully capable of carrying out functions conserved within Reoviridae. Here, we ...Unlike the multishelled viruses in the Reoviridae, cytoplasmic polyhedrosis virus (CPV) is single shelled, yet stable and fully capable of carrying out functions conserved within Reoviridae. Here, we report a 3.1 Å resolution cryo electron microscopy structure of CPV and derive its atomic model, consisting of 60 turret proteins (TPs), 120 each of capsid shell proteins (CSPs) and large protrusion proteins (LPPs). Two unique segments of CSP contribute to CPV's stability: an inserted protrusion domain interacting with neighboring proteins, and an N-anchor tying up CSPs together through strong interactions such as β sheet augmentation. Without the need to interact with outer shell proteins, LPP retains only the N-terminal two-third region containing a conserved helix-barrel core and interacts exclusively with CSP. TP is also simplified, containing only domains involved in RNA capping. Our results illustrate how CPV proteins have evolved in a coordinative manner to economically carry out their conserved functions. | ||||||
History |
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Structure visualization
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Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 744.1 KB | Display | ![]() |
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PDB format | ![]() | 612.4 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 5256MC 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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2 |
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3 | ![]()
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4 | ![]()
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5 | ![]()
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Symmetry | Point symmetry: (Schoenflies symbol: I (icosahedral)) |
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Components
#1: Protein | Mass: 120145.797 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() | ||
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#2: Protein | Mass: 148560.859 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() #3: Protein | Mass: 49929.211 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
-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: cytoplasmic polyhedrosis virus (CPV) / Type: VIRUS Details: Icosahedral particle. CPV particles were purified from polyhedra. |
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Details of virus | Empty: NO / Enveloped: NO / Host category: INVERTERBRATES / Isolate: STRAIN / Type: VIRION |
Buffer solution | pH: 7.4 / Details: 10mM PBS |
Specimen | Conc.: 3 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES / Details: 10mM PBS |
Vitrification | Cryogen name: ETHANE / Temp: 90 K / Humidity: 40 % / Method: Blot for 3 seconds 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 / Date: Jul 12, 2010 / Details: Low dose |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal magnification: 59000 X / Nominal defocus max: 2500 nm / Nominal defocus min: 1000 nm / Cs: 2.75 mm Astigmatism: objective lens astigmatism was corrected a t 150,000 magnification Camera length: 0 mm |
Specimen holder | Specimen holder model: OTHER / Specimen holder type: Eucentric / Temperature: 90 K / Tilt angle max: -9999 ° / Tilt angle min: -9999 ° |
Image recording | Electron dose: 25 e/Å2 / Film or detector model: KODAK SO-163 FILM |
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Processing
EM software | Name: IMIRS / Category: 3D reconstruction | ||||||||||||
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CTF correction | Details: Each particle | ||||||||||||
Symmetry | Point symmetry: I (icosahedral) | ||||||||||||
3D reconstruction | Method: common line / Resolution: 3.1 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 28993 Details: ( Details about the particle: 645 micrographs that clearly showed signals beyond 6 angstrom in their spectra ) Symmetry type: POINT | ||||||||||||
Refinement step | Cycle: LAST
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