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Open data
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Basic information
| Entry | Database: PDB / ID: 4ep0 | ||||||
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| Title | Structure of the bacteriophage C1 tail knob protein, gp12 | ||||||
Components | Major tail protein | ||||||
Keywords | STRUCTURAL PROTEIN / VIRAL PROTEIN | ||||||
| Function / homology | Distal tube protein, N-terminal / Caudoviral major tail protein N-terminus / identical protein binding / Major tail protein Function and homology information | ||||||
| Biological species | Streptococcus phage C1 (virus) | ||||||
| Method | X-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 4 Å | ||||||
Authors | Aksyuk, A.A. / Rossmann, M.G. | ||||||
Citation | Journal: Proc Natl Acad Sci U S A / Year: 2012Title: Structural investigations of a Podoviridae streptococcus phage C1, implications for the mechanism of viral entry. Authors: Anastasia A Aksyuk / Valorie D Bowman / Bärbel Kaufmann / Christopher Fields / Thomas Klose / Heather A Holdaway / Vincent A Fischetti / Michael G Rossmann / ![]() Abstract: The Podoviridae phage C1 was one of the earliest isolated bacteriophages and the first virus documented to be active against streptococci. The icosahedral and asymmetric reconstructions of the virus ...The Podoviridae phage C1 was one of the earliest isolated bacteriophages and the first virus documented to be active against streptococci. The icosahedral and asymmetric reconstructions of the virus were calculated using cryo-electron microscopy. The capsid protein has an HK97 fold arranged into a T = 4 icosahedral lattice. The C1 tail is terminated with a ϕ29-like knob, surrounded by a skirt of twelve long appendages with novel morphology. Several C1 structural proteins have been identified, including a candidate for an appendage. The crystal structure of the knob has an N-terminal domain with a fold observed previously in tube forming proteins of Siphoviridae and Myoviridae phages. The structure of C1 suggests the mechanisms by which the virus digests the cell wall and ejects its genome. Although there is little sequence similarity to other phages, conservation of the structural proteins demonstrates a common origin of the head and tail, but more recent evolution of the appendages. | ||||||
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Structure visualization
| Structure viewer | Molecule: Molmil Jmol/JSmol |
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| PDBx/mmCIF format | 4ep0.cif.gz | 2.3 MB | Display | PDBx/mmCIF format |
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| PDB format | pdb4ep0.ent.gz | 1.9 MB | Display | PDB format |
| PDBx/mmJSON format | 4ep0.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Summary document | 4ep0_validation.pdf.gz | 522.2 KB | Display | wwPDB validaton report |
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| Full document | 4ep0_full_validation.pdf.gz | 612.4 KB | Display | |
| Data in XML | 4ep0_validation.xml.gz | 189.6 KB | Display | |
| Data in CIF | 4ep0_validation.cif.gz | 256.7 KB | Display | |
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/ep/4ep0 ftp://data.pdbj.org/pub/pdb/validation_reports/ep/4ep0 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 5445C ![]() 5446C ![]() 4eo2SC S: Starting model for refinement C: citing same article ( |
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| Similar structure data |
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Assembly
| Deposited unit | ![]()
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| Noncrystallographic symmetry (NCS) | NCS domain:
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Streptococcus phage C1 (virus)
X-RAY DIFFRACTION
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