5A6S

Crystal structure of the CTP1L endolysin reveals how its activity is regulated by a secondary translation product


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.162 
  • R-Value Observed: 0.164 

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This is version 1.1 of the entry. See complete history


Literature

Crystal Structure of the Ctp1L Endolysin Reveals How its Activity is Regulated by a Secondary Translation Product.

Dunne, M.Leicht, S.Krichel, B.Mertens, H.D.T.Thompson, A.Krijgsveld, J.Svergun, D.I.Gomez-Torres, N.Garde, S.Uetrecht, C.Narbad, A.Mayer, M.J.Meijers, R.

(2016) J Biol Chem 291: 4882

  • DOI: 10.1074/jbc.M115.671172
  • Primary Citation of Related Structures:  
    5A6S

  • PubMed Abstract: 
  • Bacteriophages produce endolysins, which lyse the bacterial host cell to release newly produced virions. The timing of lysis is regulated and is thought to involve the activation of a molecular switch. We present a crystal structure of the activated ...

    Bacteriophages produce endolysins, which lyse the bacterial host cell to release newly produced virions. The timing of lysis is regulated and is thought to involve the activation of a molecular switch. We present a crystal structure of the activated endolysin CTP1L that targets Clostridium tyrobutyricum, consisting of a complex between the full-length protein and an N-terminally truncated C-terminal cell wall binding domain (CBD). The truncated CBD is produced through an internal translation start site within the endolysin gene. Mutants affecting the internal translation site change the oligomeric state of the endolysin and reduce lytic activity. The activity can be modulated by reconstitution of the full-length endolysin-CBD complex with free CBD. The same oligomerization mechanism applies to the CD27L endolysin that targets Clostridium difficile and the CS74L endolysin that targets Clostridium sporogenes. When the CTP1L endolysin gene is introduced into the commensal bacterium Lactococcus lactis, the truncated CBD is also produced, showing that the alternative start codon can be used in other bacterial species. The identification of a translational switch affecting oligomerization presented here has implications for the design of effective endolysins for the treatment of bacterial infections.


    Organizational Affiliation

    From the European Molecular Biology Laboratory, Notkestrasse 85, 22607 Hamburg, Germany, r.meijers@embl-hamburg.de.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ENDOLYSINA294Clostridium phage phiCTP1Mutation(s): 0 
Gene Names: phiCTP1_gp29
Find proteins for D9ZNF3 (Clostridium phage phiCTP1)
Explore D9ZNF3 
Go to UniProtKB:  D9ZNF3
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
ENDOLYSINB80Clostridium phage phiCTP1Mutation(s): 1 
Gene Names: phiCTP1_gp29
Find proteins for D9ZNF3 (Clostridium phage phiCTP1)
Explore D9ZNF3 
Go to UniProtKB:  D9ZNF3
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
1PE
Query on 1PE

Download CCD File 
A
PENTAETHYLENE GLYCOL
C10 H22 O6
JLFNLZLINWHATN-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
GOL
Query on GOL

Download CCD File 
A, B
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.162 
  • R-Value Observed: 0.164 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 136.197α = 90
b = 136.197β = 90
c = 56.457γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-12-30
    Type: Initial release
  • Version 1.1: 2016-03-16
    Changes: Database references