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- PDB-2xd8: Capsid structure of the infectious Prochlorococcus Cyanophage P-SSP7 -
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Open data
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Basic information
Entry | Database: PDB / ID: 2xd8 | ||||||
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Title | Capsid structure of the infectious Prochlorococcus Cyanophage P-SSP7 | ||||||
![]() | T7-LIKE CAPSID PROTEIN | ||||||
![]() | VIRUS / MARINE PODOVIRUS / T7-LIKE VIRUS | ||||||
Function / homology | Predicted protein![]() | ||||||
Biological species | ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.6 Å | ||||||
Model type details | CA ATOMS ONLY, CHAIN A, B, C, D, E, F, G | ||||||
![]() | Liu, X. / Zhang, Q. / Murata, K. / Baker, M.L. / Sullivan, M.B. / Fu, C. / Dougherty, M. / Schmid, M.F. / Osburne, M.S. / Chisholm, S.W. / Chiu, W. | ||||||
![]() | ![]() Title: Structural changes in a marine podovirus associated with release of its genome into Prochlorococcus. Authors: Xiangan Liu / Qinfen Zhang / Kazuyoshi Murata / Matthew L Baker / Matthew B Sullivan / Caroline Fu / Matthew T Dougherty / Michael F Schmid / Marcia S Osburne / Sallie W Chisholm / Wah Chiu / ![]() Abstract: Podovirus P-SSP7 infects Prochlorococcus marinus, the most abundant oceanic photosynthetic microorganism. Single-particle cryo-electron microscopy yields icosahedral and asymmetrical structures of ...Podovirus P-SSP7 infects Prochlorococcus marinus, the most abundant oceanic photosynthetic microorganism. Single-particle cryo-electron microscopy yields icosahedral and asymmetrical structures of infectious P-SSP7 with 4.6-A and 9-A resolution, respectively. The asymmetric reconstruction reveals how symmetry mismatches are accommodated among five of the gene products at the portal vertex. Reconstructions of infectious and empty particles show a conformational change of the 'valve' density in the nozzle, an orientation difference in the tail fibers, a disordering of the C terminus of the portal protein and the disappearance of the core proteins. In addition, cryo-electron tomography of P-SSP7 infecting Prochlorococcus showed the same tail-fiber conformation as that in empty particles. Our observations suggest a mechanism whereby, upon binding to the host cell, the tail fibers induce a cascade of structural alterations of the portal vertex complex that triggers DNA release. | ||||||
History |
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Structure visualization
Movie |
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Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 79 KB | Display | ![]() |
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PDB format | ![]() | 50.6 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 1713MC ![]() 1707C ![]() 1714C ![]() 1715C 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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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: 39494.211 Da / Num. of mol.: 7 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() Description: P-SSP7 WERE PROPAGATED ON PROCHLOROCOCCUS MED4. Production host: ![]() |
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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: CYANOPHAGE P-SSP7 / Type: VIRUS |
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Buffer solution | Name: 100 MM TRIS-HCL, 100 MM MGSO4, AND 30 MM NACL / pH: 7.5 / Details: 100 MM TRIS-HCL, 100 MM MGSO4, AND 30 MM NACL |
Specimen | Conc.: 5 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Specimen support | Details: HOLEY CARBON |
Vitrification | Instrument: FEI VITROBOT MARK I / Cryogen name: ETHANE |
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Electron microscopy imaging
Microscopy | Model: JEOL 3200FSC / Date: Aug 31, 2007 |
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Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal magnification: 60000 X / Nominal defocus max: 3000 nm / Nominal defocus min: 600 nm / Cs: 4.1 mm |
Specimen holder | Temperature: 101 K |
Image recording | Electron dose: 20 e/Å2 / Film or detector model: KODAK SO-163 FILM |
Image scans | Num. digital images: 1059 |
Radiation wavelength | Relative weight: 1 |
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Processing
EM software | Name: MPSA / Category: 3D reconstruction | |||||||||||||||||||||
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CTF correction | Details: INDIVIDUAL MICROGRAPH | |||||||||||||||||||||
Symmetry | Point symmetry: I (icosahedral) | |||||||||||||||||||||
3D reconstruction | Method: CROSS-COMMON LINES / Resolution: 4.6 Å / Num. of particles: 36000 / Nominal pixel size: 1.27 Å / Actual pixel size: 1.17 Å / Magnification calibration: 2D CRYSTAL Details: SUBMISSION BASED ON EXPERIMENTAL DATA FROM EMDB EMD-1713. Symmetry type: POINT | |||||||||||||||||||||
Atomic model building |
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Refinement | Highest resolution: 4.6 Å | |||||||||||||||||||||
Refinement step | Cycle: LAST / Highest resolution: 4.6 Å
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