Crystal structure of Dettilon tailspike protein (gp208)

Experimental Data Snapshot

  • Resolution: 1.63 Å
  • R-Value Free: 0.188 
  • R-Value Work: 0.159 
  • R-Value Observed: 0.160 

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Time-resolved DNA release from an O-antigen-specificSalmonellabacteriophage with a contractile tail.

Broeker, N.K.Roske, Y.Valleriani, A.Stephan, M.S.Andres, D.Koetz, J.Heinemann, U.Barbirz, S.

(2019) J Biol Chem 294: 11751-11761

  • DOI: https://doi.org/10.1074/jbc.RA119.008133
  • Primary Citation of Related Structures:  
    6F7D, 6F7K

  • PubMed Abstract: 

    Myoviruses, bacteriophages with T4-like architecture, must contract their tails prior to DNA release. However, quantitative kinetic data on myovirus particle opening are lacking, although they are promising tools in bacteriophage-based antimicrobial strategies directed against Gram-negative hosts. For the first time, we show time-resolved DNA ejection from a bacteriophage with a contractile tail, the multi-O-antigen-specific Salmonella myovirus Det7. DNA release from Det7 was triggered by lipopolysaccharide (LPS) O-antigen receptors and notably slower than in noncontractile-tailed siphoviruses. Det7 showed two individual kinetic steps for tail contraction and particle opening. Our in vitro studies showed that highly specialized tailspike proteins (TSPs) are necessary to attach the particle to LPS. A P22-like TSP confers specificity for the Salmonella Typhimurium O-antigen. Moreover, crystal structure analysis at 1.63 Å resolution confirmed that Det7 recognized the Salmonella Anatum O-antigen via an ϵ15-like TSP, DettilonTSP. DNA ejection triggered by LPS from either host showed similar velocities, so particle opening is thus a process independent of O-antigen composition and the recognizing TSP. In Det7, at permissive temperatures TSPs mediate O-antigen cleavage and couple cell surface binding with DNA ejection, but no irreversible adsorption occurred at low temperatures. This finding was in contrast to short-tailed Salmonella podoviruses, illustrating that tailed phages use common particle-opening mechanisms but have specialized into different infection niches.

  • Organizational Affiliation

    Department of Physikalische Biochemie, Universität Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Tailspike538Salmonella phage Det7Mutation(s): 0 
Gene Names: 208DET7_208
Find proteins for A0A0C5PVE3 (Salmonella phage Det7)
Explore A0A0C5PVE3 
Go to UniProtKB:  A0A0C5PVE3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A0C5PVE3
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.63 Å
  • R-Value Free: 0.188 
  • R-Value Work: 0.159 
  • R-Value Observed: 0.160 
  • Space Group: I 21 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 151.623α = 90
b = 151.623β = 90
c = 151.623γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
German Research FoundationGermanyBA 4046/1-2

Revision History  (Full details and data files)

  • Version 1.0: 2018-12-19
    Type: Initial release
  • Version 1.1: 2019-06-26
    Changes: Data collection, Database references
  • Version 1.2: 2019-08-14
    Changes: Data collection, Database references
  • Version 1.3: 2024-05-08
    Changes: Data collection, Database references