6ZIG

Topological model of the p2 virion baseplate in activated conformation (closed Tal trimer)


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 42.2 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

Structural Insights into Lactococcal Siphophage p2 Baseplate Activation Mechanism.

Spinelli, S.Tremblay, D.Moineau, S.Cambillau, C.Goulet, A.

(2020) Viruses 12

  • DOI: 10.3390/v12080878
  • Primary Citation of Related Structures:  
    6ZIH, 6ZIG, 6ZJJ

  • PubMed Abstract: 
  • Virulent phages infecting L. lactis , an industry-relevant bacterium, pose a significant risk to the quality of the fermented milk products. Phages of the Skunavirus genus are by far the most isolated lactococcal phages in the cheese environments and phage p2 is the model siphophage for this viral genus ...

    Virulent phages infecting L. lactis , an industry-relevant bacterium, pose a significant risk to the quality of the fermented milk products. Phages of the Skunavirus genus are by far the most isolated lactococcal phages in the cheese environments and phage p2 is the model siphophage for this viral genus. The baseplate of phage p2, which is used to recognize its host, was previously shown to display two conformations by X-ray crystallography, a rested state and an activated state ready to bind to the host. The baseplate became only activated and opened in the presence of Ca 2+ . However, such an activated state was not previously observed in the virion. Here, using nanobodies binding to the baseplate, we report on the negative staining electron microscopy structure of the activated form of the baseplate directly observed in the p2 virion, that is compatible with the activated baseplate crystal structure. Analyses of this new structure also established the presence of a second distal tail (Dit) hexamer as a component of the baseplate, the topology of which differs largely from the first one. We also observed an uncoupling between the baseplate activation and the tail tip protein (Tal) opening, suggesting an infection mechanism more complex than previously expected.


    Organizational Affiliation

    Architecture et Fonction des Macromolécules Biologiques, Centre National de la Recherche Scientifique (CNRS), Campus de Luminy, 13288 Marseille CEDEX 09, France.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Receptor binding protein
A, B, C, D, E, F, G, H
A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R
264Lactococcus virus P2Mutation(s): 0 
Gene Names: rbp
UniProt
Find proteins for Q71AW2 (Lactococcus phage p2)
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Go to UniProtKB:  Q71AW2
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Distal tail protein298Lactococcus virus P2Mutation(s): 0 
UniProt
Find proteins for D3WAD3 (Lactococcus phage p2)
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Go to UniProtKB:  D3WAD3
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Baseplate protein gp16AA [auth 1], Y, Z375Lactococcus virus P2Mutation(s): 0 
UniProt
Find proteins for D3KFX4 (Lactococcus phage p2)
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Go to UniProtKB:  D3KFX4
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 42.2 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2020-08-26
    Type: Initial release