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 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

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

  • 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

    1] Department of Crystallography and Structural Biology, Instituto de Química-Física Rocasolano, CSIC, Serrano 119, 28006 Madrid, Spain [2].




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SECRETED 45 KDA PROTEIN
A, B
392Streptococcus pneumoniae serotype 2 (strain D39 / NCTC 7466)Mutation(s): 0 
Find proteins for A0A0H2ZQ76 (Streptococcus pneumoniae serotype 2 (strain D39 / NCTC 7466))
Go to UniProtKB:  A0A0H2ZQ76
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download SDF File 
Download CCD File 
A, B
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
EDO
Query on EDO

Download SDF File 
Download CCD File 
A
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
PG4
Query on PG4

Download SDF File 
Download CCD File 
B
TETRAETHYLENE GLYCOL
C8 H18 O5
UWHCKJMYHZGTIT-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
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 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 125.815α = 90.00
b = 125.815β = 90.00
c = 126.637γ = 120.00
Software Package:
Software NamePurpose
Aimlessdata scaling
SHELXphasing
XDSdata reduction
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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