5A21

Structure of bacteriophage SPP1 head-to-tail interface without DNA and tape measure protein


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 7.2 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structural Rearrangements in the Phage Head-to-Tail Interface During Assembly and Infection.

Chaban, Y.Lurz, R.Brasiles, S.Cornilleau, C.Karreman, M.Zinn-Justin, S.Tavares, P.Orlova, E.V.

(2015) Proc.Natl.Acad.Sci.USA 112: 7009

  • DOI: 10.1073/pnas.1504039112
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Many icosahedral viruses use a specialized portal vertex to control genome encapsidation and release from the viral capsid. In tailed bacteriophages, the portal system is connected to a tail structure that provides the pipeline for genome delivery to ...

    Many icosahedral viruses use a specialized portal vertex to control genome encapsidation and release from the viral capsid. In tailed bacteriophages, the portal system is connected to a tail structure that provides the pipeline for genome delivery to the host cell. We report the first, to our knowledge, subnanometer structures of the complete portal-phage tail interface that mimic the states before and after DNA release during phage infection. They uncover structural rearrangements associated with intimate protein-DNA interactions. The portal protein gp6 of bacteriophage SPP1 undergoes a concerted reorganization of the structural elements of its central channel during interaction with DNA. A network of protein-protein interactions primes consecutive binding of proteins gp15 and gp16 to extend and close the channel. This critical step that prevents genome leakage from the capsid is achieved by a previously unidentified allosteric mechanism: gp16 binding to two different regions of gp15 drives correct positioning and folding of an inner gp16 loop to interact with equivalent loops of the other gp16 subunits. Together, these loops build a plug that closes the channel. Gp16 then fastens the tail to yield the infectious virion. The gatekeeper system opens for viral genome exit at the beginning of infection but recloses afterward, suggesting a molecular diaphragm-like mechanism to control DNA efflux. The mechanisms described here, controlling the essential steps of phage genome movements during virus assembly and infection, are likely to be conserved among long-tailed phages, the largest group of viruses in the Biosphere.


    Organizational Affiliation

    Institute of Structural and Molecular Biology, Birkbeck College, London WC1E 7HX, United Kingdom;




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PORTAL PROTEIN
A, B
503Bacillus phage SPP1Mutation(s): 0 
Gene Names: 6 (siz)
Find proteins for P54309 (Bacillus phage SPP1)
Go to UniProtKB:  P54309
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
15 PROTEIN
C, D
102Bacillus phage SPP1Mutation(s): 0 
Gene Names: 15
Find proteins for Q38584 (Bacillus phage SPP1)
Go to UniProtKB:  Q38584
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
HEAD COMPLETION PROTEIN GP16
E, F
109Bacillus phage SPP1Mutation(s): 0 
Gene Names: 16
Find proteins for O48446 (Bacillus phage SPP1)
Go to UniProtKB:  O48446
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
TAIL-TO-HEAD JOINING PROTEIN GP17
G
134Bacillus phage SPP1Mutation(s): 0 
Find proteins for O48448 (Bacillus phage SPP1)
Go to UniProtKB:  O48448
Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
MAJOR TAIL PROTEIN 17.1
H
177Bacillus phage SPP1Mutation(s): 0 
Gene Names: 17.1
Find proteins for O48449 (Bacillus phage SPP1)
Go to UniProtKB:  O48449
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 7.2 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-06-03
    Type: Initial release
  • Version 1.1: 2015-06-17
    Type: Database references
  • Version 1.2: 2016-04-27
    Type: Structure summary
  • Version 1.3: 2017-08-23
    Type: Data collection