2WJE

Crystal structure of the tyrosine phosphatase Cps4B from Steptococcus pneumoniae TIGR4.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.899 Å
  • R-Value Free: 0.190 
  • R-Value Work: 0.139 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal Structures of Wzb of Escherichia Coli and Cpsb of Streptococcus Pneumoniae, Representatives of Two Families of Tyrosine Phosphatases that Regulate Capsule Assembly.

Hagelueken, G.Huang, H.Mainprize, I.L.Whitfield, C.Naismith, J.H.

(2009) J.Mol.Biol. 392: 678

  • DOI: 10.1016/j.jmb.2009.07.026
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Many Gram-positive and Gram-negative bacteria utilize polysaccharide surface layers called capsules to evade the immune system; consequently, the synthesis and export of the capsule are a potential therapeutic target. In Escherichia coli K-30, the in ...

    Many Gram-positive and Gram-negative bacteria utilize polysaccharide surface layers called capsules to evade the immune system; consequently, the synthesis and export of the capsule are a potential therapeutic target. In Escherichia coli K-30, the integral membrane tyrosine autokinase Wzc and the cognate phosphatase Wzb have been shown to be key for both synthesis and assembly of capsular polysaccharides. In the Gram-positive bacterium Streptococcus pneumoniae, the CpsCD complex is analogous to Wzc and the phosphatase CpsB is the corresponding cognate phosphatase. The phosphatases are known to dephosphorylate their corresponding autokinases, yet despite their functional equivalence, they share no sequence homology. We present the structure of Wzb in complex with phosphate and high-resolution structures of apo-CpsB and a phosphate-complexed CpsB. We show that both proteins are active toward Wzc and thereby demonstrate that CpsB is not specific for CpsCD. CpsB is a novel enzyme and represents the first solved structure of a tyrosine phosphatase from a Gram-positive bacterium. Wzb and CpsB have completely different structures, suggesting that they must operate by very different mechanisms. Although the mechanism of Wzb can be inferred from previous studies, CpsB appears to have a tyrosine phosphatase mechanism not observed before. We propose a chemical mechanism for CpsB based on site-directed mutagenesis and structural data.


    Organizational Affiliation

    Centre for Biomolecular Sciences, The University of St. Andrews, Fife, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TYROSINE-PROTEIN PHOSPHATASE CPSB
A
247Streptococcus pneumoniae serotype 4 (strain ATCC BAA-334 / TIGR4)Mutation(s): 0 
Gene Names: cpsB (wzh)
EC: 3.1.3.48
Find proteins for Q9AHD4 (Streptococcus pneumoniae serotype 4 (strain ATCC BAA-334 / TIGR4))
Go to UniProtKB:  Q9AHD4
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MN
Query on MN

Download SDF File 
Download CCD File 
A
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.899 Å
  • R-Value Free: 0.190 
  • R-Value Work: 0.139 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 43.980α = 90.00
b = 58.540β = 90.00
c = 114.840γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data scaling
PHASERphasing
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-07-14
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance