SeMet Tailspike protein 4 (TSP4) phage CBA120, residues 1-335, obtained in the presence of LiSO4

Experimental Data Snapshot

  • Resolution: 3.02 Å
  • R-Value Free: 0.296 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.228 

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Structure of Escherichia coli O157:H7 bacteriophage CBA120 tailspike protein 4 baseplate anchor and tailspike assembly domains (TSP4-N).

Chao, K.L.Shang, X.Greenfield, J.Linden, S.B.Alreja, A.B.Nelson, D.C.Herzberg, O.

(2022) Sci Rep 12: 2061-2061

  • DOI: https://doi.org/10.1038/s41598-022-06073-2
  • Primary Citation of Related Structures:  
    7REJ, 7RFO, 7RFV

  • PubMed Abstract: 

    Four tailspike proteins (TSP1-4) of Escherichia coli O157:H7 bacteriophage CBA120 enable infection of multiple hosts. They form a branched complex that attaches to the tail baseplate. Each TSP recognizes a different lipopolysaccharide on the membrane of a different bacterial host. The 335 N-terminal residues of TSP4 promote the assembly of the TSP complex and anchor it to the tail baseplate. The crystal structure of TSP4-N 335 reveals a trimeric protein comprising four domains. The baseplate anchor domain (AD) contains an intertwined triple-stranded β-helix. The ensuing XD1, XD2 and XD3 β-sheet containing domains mediate the binding of TSP1-3 to TSP4. Each of the XD domains adopts the same fold as the respective XD domains of bacteriophage T4 gp10 baseplate protein, known to engage in protein-protein interactions via its XD2 and XD3 domains. The structural similarity suggests that XD2 and XD3 of TSP4 also function in protein-protein interactions. Analytical ultracentrifugation analyses of TSP4-N 335 and of domain deletion proteins showed how TSP4-N 335 promotes the formation of the TSP quaternary complex. TSP1 and TSP2 bind directly to TSP4 whereas TSP3 binding requires a pre-formed TSP4-N 335 :TSP2 complex. A 3-dimensional model of the bacteriophage CBA120 TSP complex has been developed based on the structural and ultracentrifuge information.

  • Organizational Affiliation

    Institute for Bioscience and Biotechnology Research, University of Maryland, 9600 Gudelsky Drive, Rockville, MD, 20850, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Tailspike protein
A, B, C
341Kuttervirus CBA120Mutation(s): 3 
Gene Names: orf213
Find proteins for G3M192 (Escherichia phage Cba120)
Explore G3M192 
Go to UniProtKB:  G3M192
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupG3M192
Sequence Annotations
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
Query on MSE
A, B, C
Experimental Data & Validation

Experimental Data

  • Resolution: 3.02 Å
  • R-Value Free: 0.296 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.228 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 67.9α = 90
b = 67.9β = 90
c = 607.2γ = 90
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
TRUNCATEdata reduction
Aimlessdata scaling

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesRO1GM110202

Revision History  (Full details and data files)

  • Version 1.0: 2022-02-23
    Type: Initial release