4CGK

Crystal structure of the essential protein PcsB from Streptococcus pneumoniae


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.55 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.238 
  • R-Value Observed: 0.239 

wwPDB Validation 3D Report Full Report



Literature

Structural Basis of Pcsb-Mediated Cell Separation in Streptococcus Pneumoniae.

Bartual, S.G.Straume, D.Stamsas, G.A.Munoz, I.G.Alfonso, C.Martinez-Ripoll, M.Havarstein, L.S.Hermoso, J.A.

(2014) Nat Commun 5: 3842

  • DOI: 10.1038/ncomms4842
  • Primary Citation of Related Structures:  
    4CGK

  • PubMed Abstract: 
  • Separation of daughter cells during bacterial cell division requires splitting of the septal cross wall by peptidoglycan hydrolases. In Streptococcus pneumoniae, PcsB is predicted to perform this operation. Recent evidence shows that PcsB is recruite ...

    Separation of daughter cells during bacterial cell division requires splitting of the septal cross wall by peptidoglycan hydrolases. In Streptococcus pneumoniae, PcsB is predicted to perform this operation. Recent evidence shows that PcsB is recruited to the septum by the transmembrane FtsEX complex, and that this complex is required for cell division. However, PcsB lacks detectable catalytic activity in vitro, and while it has been proposed that FtsEX activates PcsB, evidence for this is lacking. Here we demonstrate that PcsB has muralytic activity, and report the crystal structure of full-length PcsB. The protein adopts a dimeric structure in which the V-shaped coiled-coil (CC) domain of each monomer acts as a pair of molecular tweezers locking the catalytic domain of each dimeric partner in an inactive configuration. This suggests that the release of the catalytic domains likely requires an ATP-driven conformational change in the FtsEX complex, conveyed towards the catalytic domains through coordinated movements of the CC domain.


    Organizational Affiliation

    Department of Crystallography and Structural Biology, Instituto de Química-Física Rocasolano, CSIC, Serrano 119, 28006 Madrid, Spain.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
SECRETED 45 KDA PROTEINAB392Streptococcus pneumoniae D39Mutation(s): 0 
Gene Names: SPD_2043
Find proteins for A0A0H2ZQ76 (Streptococcus pneumoniae serotype 2 (strain D39 / NCTC 7466))
Explore A0A0H2ZQ76 
Go to UniProtKB:  A0A0H2ZQ76
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PG4
Query on PG4

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B
TETRAETHYLENE GLYCOL
C8 H18 O5
UWHCKJMYHZGTIT-UHFFFAOYSA-N
 Ligand Interaction
EDO
Query on EDO

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A
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

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A, B
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
MG
Query on MG

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B
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.55 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.238 
  • R-Value Observed: 0.239 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 125.815α = 90
b = 125.815β = 90
c = 126.637γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
Aimlessdata scaling
SHELXphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-05-21
    Type: Initial release