Crystal structure of Bacteriophage CBA120 tailspike protein 3 (TSP3, orf212)

Experimental Data Snapshot

  • Resolution: 2.18 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.180 
  • R-Value Observed: 0.181 

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Structure and Function of the Branched Receptor-Binding Complex of Bacteriophage CBA120.

Plattner, M.Shneider, M.M.Arbatsky, N.P.Shashkov, A.S.Chizhov, A.O.Nazarov, S.Prokhorov, N.S.Taylor, N.M.I.Buth, S.A.Gambino, M.Gencay, Y.E.Brondsted, L.Kutter, E.M.Knirel, Y.A.Leiman, P.G.

(2019) J Mol Biol 431: 3718-3739

  • DOI: https://doi.org/10.1016/j.jmb.2019.07.022
  • Primary Citation of Related Structures:  
    5W6F, 5W6H, 5W6P

  • PubMed Abstract: 

    Bacteriophages recognize their host cells with the help of tail fiber and tailspike proteins that bind, cleave, or modify certain structures on the cell surface. The spectrum of ligands to which the tail fibers and tailspikes can bind is the primary determinant of the host range. Bacteriophages with multiple tailspike/tail fibers are thought to have a wider host range than their less endowed relatives but the function of these proteins remains poorly understood. Here, we describe the structure, function, and substrate specificity of three tailspike proteins of bacteriophage CBA120-TSP2, TSP3 and TSP4 (orf211 through orf213, respectively). We show that tailspikes TSP2, TSP3 and TSP4 are hydrolases that digest the O157, O77, and O78 Escherichia coli O-antigens, respectively. We demonstrate that recognition of the E. coli O157:H7 host by CBA120 involves binding to and digesting the O157 O-antigen by TSP2. We report the crystal structure of TSP2 in complex with a repeating unit of the O157 O-antigen. We demonstrate that according to the specificity of its tailspikes TSP2, TSP3, and TSP4, CBA120 can infect E. coli O157, O77, and O78, respectively. We also show that CBA120 infects Salmonella enterica serovar Minnesota, and this host range expansion is likely due to the function of TSP1. Finally, we describe the assembly pathway and the architecture of the TSP1-TSP2-TSP3-TSP4 branched complex in CBA120 and its related ViI-like phages.

  • Organizational Affiliation

    Department of Biochemistry and Molecular Biology, Sealy Center for Structural Biology and Molecular Biophysics, University of Texas Medical Branch, 301 University Blvd, Galveston, TX 77555-0647, USA; École Polytechnique Fédérale de Lausanne, Lausanne CH-1015, Switzerland.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
tailspike protein 3
A, B, C
635Kuttervirus CBA120Mutation(s): 0 
Gene Names: orf212
Find proteins for G3M191 (Escherichia phage Cba120)
Explore G3M191 
Go to UniProtKB:  G3M191
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupG3M191
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on CL

Download Ideal Coordinates CCD File 
Experimental Data & Validation

Experimental Data

  • Resolution: 2.18 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.180 
  • R-Value Observed: 0.181 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 100.58α = 90
b = 66.781β = 105.86
c = 161.989γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number

Revision History  (Full details and data files)

  • Version 1.0: 2018-10-24
    Type: Initial release
  • Version 1.1: 2019-07-24
    Changes: Data collection, Structure summary
  • Version 1.2: 2019-11-06
    Changes: Data collection, Database references
  • Version 1.3: 2024-03-13
    Changes: Data collection, Database references