6R21

Cryo-EM structure of T7 bacteriophage fiberless tail complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.33 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

Structures of T7 bacteriophage portal and tail suggest a viral DNA retention and ejection mechanism.

Cuervo, A.Fabrega-Ferrer, M.Machon, C.Conesa, J.J.Fernandez, F.J.Perez-Luque, R.Perez-Ruiz, M.Pous, J.Vega, M.C.Carrascosa, J.L.Coll, M.

(2019) Nat Commun 10: 3746-3746

  • DOI: 10.1038/s41467-019-11705-9
  • Primary Citation of Related Structures:  
    6R21, 6QX5, 6QWP, 6QXM

  • PubMed Abstract: 
  • Double-stranded DNA bacteriophages package their genome at high pressure inside a procapsid through the portal, an oligomeric ring protein located at a unique capsid vertex. Once the DNA has been packaged, the tail components assemble on the portal to render the mature infective virion ...

    Double-stranded DNA bacteriophages package their genome at high pressure inside a procapsid through the portal, an oligomeric ring protein located at a unique capsid vertex. Once the DNA has been packaged, the tail components assemble on the portal to render the mature infective virion. The tail tightly seals the ejection conduit until infection, when its interaction with the host membrane triggers the opening of the channel and the viral genome is delivered to the host cell. Using high-resolution cryo-electron microscopy and X-ray crystallography, here we describe various structures of the T7 bacteriophage portal and fiber-less tail complex, which suggest a possible mechanism for DNA retention and ejection: a portal closed conformation temporarily retains the genome before the tail is assembled, whereas an open portal is found in the tail. Moreover, a fold including a seven-bladed β-propeller domain is described for the nozzle tail protein.


    Organizational Affiliation

    Institut de Biologia Molecular de Barcelona (IBMB-CSIC), Baldiri Reixac 10, 08028, Barcelona, Spain. miquel.coll@irbbarcelona.org.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Portal proteinABCDEFGHABCDEFGHIJKL
536Escherichia phage T7Mutation(s): 0 
Gene Names: 8
Find proteins for P03728 (Escherichia phage T7)
Explore P03728 
Go to UniProtKB:  P03728
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Tail tubular protein gp11MNOPQRSTMNOPQRSTUVWX
231Escherichia phage T7Mutation(s): 0 
Gene Names: 11
Find proteins for P03746 (Escherichia phage T7)
Explore P03746 
Go to UniProtKB:  P03746
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Tail tubular protein gp12 abcdef794Escherichia phage T7Mutation(s): 0 
Gene Names: 12
Find proteins for P03747 (Escherichia phage T7)
Explore P03747 
Go to UniProtKB:  P03747
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.33 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Spanish Ministry of Science, Innovation, and UniversitiesSpainBFU2014-54181
Spanish Ministry of Science, Innovation, and UniversitiesSpainBFU2014-53550-P
Spanish Ministry of Science, Innovation, and UniversitiesSpainBFU2017-83720-P
Spanish Ministry of Science, Innovation, and UniversitiesSpainMDM-2014-0435
Spanish Ministry of Science, Innovation, and UniversitiesSpainSEV-2013-0347
Spanish Ministry of Science, Innovation, and UniversitiesSpainRYC-2011-09071
European Commission653706

Revision History  (Full details and data files)

  • Version 1.0: 2019-09-04
    Type: Initial release