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Open data
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Basic information
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Title | Cryo-EM structure of the marine siphophage vB_Dshs-R4C capsid | |||||||||
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![]() | Marine bacteriophage / Cyro-EM / Siphophage / capsid / VIRAL PROTEIN | |||||||||
Function / homology | Phage capsid / Phage capsid family / Major capsid protein![]() | |||||||||
Biological species | ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.63 Å | |||||||||
![]() | Sun H / Huang Y / Zheng Q / Li S / Zhang R / Xia N | |||||||||
Funding support | 1 items
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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. | |||||||||
History |
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Structure visualization
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 1.3 GB | ![]() | |
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Header (meta data) | ![]() ![]() | 13.6 KB 13.6 KB | Display Display | ![]() |
Images | ![]() | 45.6 KB | ||
Others | ![]() ![]() | 1.3 GB 1.3 GB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 8gtaMC ![]() 8gtbC ![]() 8gtcC ![]() 8gtdC ![]() 8gtfC M: atomic model generated by this map C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
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Voxel size | X=Y=Z: 1.12 Å | ||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Half map: #2
File | emd_34247_half_map_1.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Half map: #1
File | emd_34247_half_map_2.map | ||||||||||||
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Density Histograms |
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Sample components
-Entire : Dinoroseobacter phage vB_DshS-R4C
Entire | Name: ![]() |
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Components |
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-Supramolecule #1: Dinoroseobacter phage vB_DshS-R4C
Supramolecule | Name: Dinoroseobacter phage vB_DshS-R4C / type: virus / ID: 1 / Parent: 0 / Macromolecule list: all / NCBI-ID: 2590919 / Sci species name: Dinoroseobacter phage vB_DshS-R4C / Virus type: VIRION / Virus isolate: SPECIES / Virus enveloped: No / Virus empty: No |
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-Macromolecule #1: Major capsid protein
Macromolecule | Name: Major capsid protein / type: protein_or_peptide / ID: 1 / Number of copies: 7 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 28.283797 KDa |
Sequence | String: GGVLVAQDYR AGSFIELLRN RMALAGVGVR ILQGLTGNVD IPKRTGASTM YFVDEDVDVT ESDGAFGLVG MTPHTAGVAT AITRRMMQQ GSPDIEALVR DDLLTSLTLG LDKTALVGHS SPSAPNGVRD LVIGDALPFT GPFATFEELV DLETAVASAN A DVDSMAYI ...String: GGVLVAQDYR AGSFIELLRN RMALAGVGVR ILQGLTGNVD IPKRTGASTM YFVDEDVDVT ESDGAFGLVG MTPHTAGVAT AITRRMMQQ GSPDIEALVR DDLLTSLTLG LDKTALVGHS SPSAPNGVRD LVIGDALPFT GPFATFEELV DLETAVASAN A DVDSMAYI YNAATSGHFK KTLEFAGVSG TIERGGQVNG YNRVKSNQIT TAGEVAFGNW SDVVIGMWSG LDLRVDTSTK AA SDGKVLR VFTDIDVALR NVESIKWGVP A UniProtKB: Major capsid protein |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Buffer | pH: 7.5 |
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Vitrification | Cryogen name: ETHANE |
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Electron microscopy
Microscope | FEI TECNAI F30 |
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Image recording | Film or detector model: FEI FALCON III (4k x 4k) / Average electron dose: 25.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.2 µm / Nominal defocus min: 1.0 µm |
Experimental equipment | ![]() Model: Tecnai F30 / Image courtesy: FEI Company |
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Image processing
Startup model | Type of model: OTHER |
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Final reconstruction | Resolution.type: BY AUTHOR / Resolution: 3.63 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 14272 |
Initial angle assignment | Type: OTHER |
Final angle assignment | Type: OTHER |