Cryo-EM structure of the T4 tail tube

Experimental Data Snapshot

  • Resolution: 3.40 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

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This is version 1.5 of the entry. See complete history


Refined Cryo-EM Structure of the T4 Tail Tube: Exploring the Lowest Dose Limit.

Zheng, W.Wang, F.Taylor, N.M.I.Guerrero-Ferreira, R.C.Leiman, P.G.Egelman, E.H.

(2017) Structure 25: 1436-1441.e2

  • DOI: https://doi.org/10.1016/j.str.2017.06.017
  • Primary Citation of Related Structures:  
    5W5E, 5W5F

  • PubMed Abstract: 

    The bacteriophage T4 contractile tail (containing a tube and sheath) was the first biological assembly reconstructed in three dimensions by electron microscopy at a resolution of ∼35 Å in 1968. A single-particle reconstruction of the T4 baseplate was able to generate a 4.1 Å resolution map for the first two rings of the tube using the overall baseplate for alignment. We have now reconstructed the T4 tail tube at a resolution of 3.4 Å, more than a 1,000-fold increase in information content for the tube from 1968. We have used legacy software (Spider) to show that we can do better than the typical 2/3 Nyquist frequency. A reasonable map can be generated with only 1.5 electrons/Å 2 using the higher dose images for alignment, but increasing the dose results in a better map, consistent with other reports that electron dose does not represent the main limitation on resolution in cryo-electron microscopy.

  • Organizational Affiliation

    Department of Biochemistry and Molecular Genetics, University of Virginia Medical School, Charlottesville, VA 22908, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Tail tube protein gp19163Escherichia phage T4Mutation(s): 0 
Find proteins for P13333 (Enterobacteria phage T4)
Explore P13333 
Go to UniProtKB:  P13333
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP13333
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 3.40 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 
EM Software:
TaskSoftware PackageVersion

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM122510
Swiss National Science FoundationSwitzerland310030_144243

Revision History  (Full details and data files)

  • Version 1.0: 2017-08-16
    Type: Initial release
  • Version 1.1: 2017-09-13
    Changes: Author supporting evidence, Data collection
  • Version 1.2: 2017-09-20
    Changes: Database references
  • Version 1.3: 2018-07-18
    Changes: Data collection
  • Version 1.4: 2020-01-01
    Changes: Author supporting evidence
  • Version 1.5: 2024-03-13
    Changes: Data collection, Database references