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- PDB-8gtb: Cryo-EM structure of the marine siphophage vB_DshS-R4C tail tube ... -
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Open data
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Basic information
Entry | Database: PDB / ID: 8gtb | ||||||
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Title | Cryo-EM structure of the marine siphophage vB_DshS-R4C tail tube protein | ||||||
![]() | Major tail protein | ||||||
![]() | VIRAL PROTEIN / Marine bacteriophage / Cryo-EM / Siphophage / tail tube protein | ||||||
Function / homology | Major tail protein![]() | ||||||
Biological species | ![]() | ||||||
Method | ELECTRON MICROSCOPY / helical reconstruction / cryo EM / Resolution: 3.43 Å | ||||||
![]() | Huang, Y. / Sun, H. / Wei, S. / Zheng, Q. / Li, S. / Zhang, R. / Xia, N. | ||||||
Funding support | 1items
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![]() | ![]() Title: Structure and proposed DNA delivery mechanism of a marine roseophage. Authors: Yang Huang / Hui Sun / Shuzhen Wei / Lanlan Cai / Liqin Liu / Yanan Jiang / Jiabao Xin / Zhenqin Chen / Yuqiong Que / Zhibo Kong / Tingting Li / Hai Yu / Jun Zhang / Ying Gu / Qingbing Zheng ...Authors: Yang Huang / Hui Sun / Shuzhen Wei / Lanlan Cai / Liqin Liu / Yanan Jiang / Jiabao Xin / Zhenqin Chen / Yuqiong Que / Zhibo Kong / Tingting Li / Hai Yu / Jun Zhang / Ying Gu / Qingbing Zheng / Shaowei Li / Rui Zhang / Ningshao Xia / ![]() Abstract: Tailed bacteriophages (order, Caudovirales) account for the majority of all phages. However, the long flexible tail of siphophages hinders comprehensive investigation of the mechanism of viral gene ...Tailed bacteriophages (order, Caudovirales) account for the majority of all phages. However, the long flexible tail of siphophages hinders comprehensive investigation of the mechanism of viral gene delivery. Here, we report the atomic capsid and in-situ structures of the tail machine of the marine siphophage, vB_DshS-R4C (R4C), which infects Roseobacter. The R4C virion, comprising 12 distinct structural protein components, has a unique five-fold vertex of the icosahedral capsid that allows genome delivery. The specific position and interaction pattern of the tail tube proteins determine the atypical long rigid tail of R4C, and further provide negative charge distribution within the tail tube. A ratchet mechanism assists in DNA transmission, which is initiated by an absorption device that structurally resembles the phage-like particle, RcGTA. Overall, these results provide in-depth knowledge into the intact structure and underlining DNA delivery mechanism for the ecologically important siphophages. | ||||||
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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PDBx/mmCIF format | ![]() | 364.6 KB | Display | ![]() |
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PDBx/mmJSON format | ![]() | Tree view | ![]() | |
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-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 34248MC ![]() 8gtaC ![]() 8gtcC ![]() 8gtdC ![]() 8gtfC M: map data used to model this data C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
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Assembly
Deposited unit | ![]()
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1 |
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Components
#1: Protein | Mass: 13574.816 Da / Num. of mol.: 18 / Source method: isolated from a natural source / Source: (natural) ![]() |
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-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: helical reconstruction |
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Sample preparation
Component | Name: vB_DshS-R4C tail tube protein / Type: VIRUS / Entity ID: all / Source: NATURAL |
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Source (natural) | Organism: ![]() |
Details of virus | Empty: NO / Enveloped: NO / Isolate: SPECIES / Type: VIRION |
Natural host | Organism: Dinoroseobacter shibae DFL 12 = DSM 16493 |
Buffer solution | pH: 7.6 |
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: Tecnai F30 / Image courtesy: FEI Company |
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Microscopy | Model: FEI TECNAI F30 |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 2200 nm / Nominal defocus min: 1000 nm |
Image recording | Electron dose: 30 e/Å2 / Film or detector model: FEI FALCON III (4k x 4k) |
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Processing
Software | Name: PHENIX / Version: 1.15.2_3472: / Classification: refinement | ||||||||||||||||||||||||
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
Helical symmerty | Angular rotation/subunit: 30 ° / Axial rise/subunit: 40 Å / Axial symmetry: C6 | ||||||||||||||||||||||||
3D reconstruction | Resolution: 3.43 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 103151 / Symmetry type: HELICAL | ||||||||||||||||||||||||
Refine LS restraints |
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