3JA7

Cryo-EM structure of the bacteriophage T4 portal protein assembly at near-atomic resolution


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.60 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Cryo-EM structure of the bacteriophage T4 portal protein assembly at near-atomic resolution.

Sun, L.Zhang, X.Gao, S.Rao, P.A.Padilla-Sanchez, V.Chen, Z.Sun, S.Xiang, Y.Subramaniam, S.Rao, V.B.Rossmann, M.G.

(2015) Nat Commun 6: 7548-7548

  • DOI: 10.1038/ncomms8548
  • Primary Citation of Related Structures:  
    3JA7

  • PubMed Abstract: 
  • The structure and assembly of bacteriophage T4 has been extensively studied. However, the detailed structure of the portal protein remained unknown. Here we report the structure of the bacteriophage T4 portal assembly, gene product 20 (gp20), determined by cryo-electron microscopy (cryo-EM) to 3 ...

    The structure and assembly of bacteriophage T4 has been extensively studied. However, the detailed structure of the portal protein remained unknown. Here we report the structure of the bacteriophage T4 portal assembly, gene product 20 (gp20), determined by cryo-electron microscopy (cryo-EM) to 3.6 Å resolution. In addition, analysis of a 10 Å resolution cryo-EM map of an empty prolate T4 head shows how the dodecameric portal assembly interacts with the capsid protein gp23 at the special pentameric vertex. The gp20 structure also verifies that the portal assembly is required for initiating head assembly, for attachment of the packaging motor, and for participation in DNA packaging. Comparison of the Myoviridae T4 portal structure with the known portal structures of φ29, SPP1 and P22, representing Podo- and Siphoviridae, shows that the portal structure probably dates back to a time when self-replicating microorganisms were being established on Earth.


    Organizational Affiliation

    Department of Biological Sciences, Purdue University, 240S. Martin Jischke Drive, West Lafayette, Indiana 47907-2032, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Portal protein gp20
A, B, C, D, E, F, G, H
A, B, C, D, E, F, G, H, I, J, K, L
455Escherichia virus T4Mutation(s): 0 
Gene Names: 20
Find proteins for P13334 (Enterobacteria phage T4)
Explore P13334 
Go to UniProtKB:  P13334
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.60 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-07-22
    Type: Initial release
  • Version 1.1: 2018-07-18
    Changes: Data collection
  • Version 1.2: 2019-12-18
    Changes: Database references, Other