Multimodular Pneumococcal Cell Wall Endolysin from phage Cp-1

Experimental Data Snapshot

  • Resolution: 2.10 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.206 

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Structural Basis for Selective Recognition of Pneumococcal Cell Wall by Modular Endolysin from Phage Cp-1

Hermoso, J.A.Monterroso, B.Albert, A.Galan, B.Ahrazem, O.Garcia, P.Martinez-Ripoll, M.Garcia, J.L.Menendez, M.

(2003) Structure 11: 1239

  • DOI: https://doi.org/10.1016/j.str.2003.09.005
  • Primary Citation of Related Structures:  
    1H09, 1OBA

  • PubMed Abstract: 

    Pneumococcal bacteriophage-encoded lysins are modular choline binding proteins that have been shown to act as enzymatic antimicrobial agents (enzybiotics) against streptococcal infections. Here we present the crystal structures of the free and choline bound states of the Cpl-1 lysin, encoded by the pneumococcal phage Cp-1. While the catalytic module displays an irregular (beta/alpha)(5)beta(3) barrel, the cell wall-anchoring module is formed by six similar choline binding repeats (ChBrs), arranged into two different structural regions: a left-handed superhelical domain configuring two choline binding sites, and a beta sheet domain that contributes in bringing together the whole structure. Crystallographic and site-directed mutagenesis studies allow us to propose a general catalytic mechanism for the whole glycoside hydrolase family 25. Our work provides the first complete structure of a member of the large family of choline binding proteins and reveals that ChBrs are versatile elements able to tune the evolution and specificity of the pneumococcal surface proteins.

  • Organizational Affiliation

    Grupo de Cristalografía Macromolecular y Biología Estructural, de Macromoléculas Biológicas, Instituto Química-Física Rocasolano, CSIC, Serrano 119, 28006 Madrid, Spain. xjuan@iqfr.csic.es

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
LYSOZYME338Streptococcus phage Cp1Mutation(s): 0 
Find proteins for P15057 (Streptococcus phage Cp-1)
Explore P15057 
Go to UniProtKB:  P15057
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP15057
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.10 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.206 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 77.95α = 90
b = 95.78β = 90
c = 129.28γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-06-26
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2024-05-08
    Changes: Data collection, Database references, Other