4Z1D

Structure of PEP and zinc bound KDO8PS from H.pylori


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.187 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.1 of the entry. See complete history


Literature

Identification of novel scaffolds for potential anti-Helicobacter pylori agents based on the crystal structure of H. pylori 3-deoxy-d-manno-octulosonate 8-phosphate synthase (HpKDO8PS).

Cho, S.Im, H.Lee, K.Y.Chen, J.Kang, H.J.Yoon, H.J.Min, K.H.Lee, K.R.Park, H.J.Lee, B.J.

(2016) Eur J Med Chem 108: 188-202

  • DOI: 10.1016/j.ejmech.2015.11.036
  • Primary Citation of Related Structures:  
    4Z1A, 4Z1B, 4Z1C, 4Z1D

  • PubMed Abstract: 
  • The crystal structure of 3-deoxy-d-manno-octulosonate-8-phosphate synthase (KDO8PS) from Helicobacter pylori (HpKDO8PS) was determined alone and within various complexes, revealing an extra helix (HE) that is absent in the structures of KDO8PS from other organisms ...

    The crystal structure of 3-deoxy-d-manno-octulosonate-8-phosphate synthase (KDO8PS) from Helicobacter pylori (HpKDO8PS) was determined alone and within various complexes, revealing an extra helix (HE) that is absent in the structures of KDO8PS from other organisms. In contrast to the metal coordination of the KDO8PS enzyme from Aquifex aeolicus, HpKDO8PS is specifically coordinated with Cd(2+) or Zn(2+) ions, and isothermal titration calorimetry (ITC) and differential scanning fluorimetry (DSF) revealed that Cd(2+) thermally stabilizes the protein structure more efficiently than Zn(2+). In the substrate-bound structure, water molecules play a key role in fixing residues in the proper configuration to achieve a compact structure. Using the structures of HpKDO8PS and API [arabinose 5-phosphate (A5P) and phosphoenolpyruvate (PEP) bisubstrate inhibitor], we generated 21 compounds showing potential HpKDO8PS-binding properties via in silico virtual screening. The capacity of three, avicularin, hyperin, and MC181, to bind to HpKDO8PS was confirmed through saturation transfer difference (STD) experiments, and we identified their specific ligand binding modes by combining competition experiments and docking simulation analysis. Hyperin was confirmed to bind to the A5P binding site, primarily via hydrophilic interaction, whereas MC181 bound to both the PEP and A5P binding sites through hydrophilic and hydrophobic interactions. These results were consistent with the epitope mapping by STD. Our results are expected to provide clues for the development of HpKDO8PS inhibitors.


    Organizational Affiliation

    Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 151-742, Republic of Korea. Electronic address: lbj@nmr.snu.ac.kr.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
2-dehydro-3-deoxyphosphooctonate aldolaseA, B276Helicobacter pylori 26695Mutation(s): 0 
Gene Names: kdsAHP_0003
EC: 2.5.1.55
UniProt
Find proteins for P56060 (Helicobacter pylori (strain ATCC 700392 / 26695))
Explore P56060 
Go to UniProtKB:  P56060
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PEP (Subject of Investigation/LOI)
Query on PEP

Download Ideal Coordinates CCD File 
C [auth A], E [auth B]PHOSPHOENOLPYRUVATE
C3 H5 O6 P
DTBNBXWJWCWCIK-UHFFFAOYSA-N
 Ligand Interaction
ZN
Query on ZN

Download Ideal Coordinates CCD File 
D [auth A], F [auth B]ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.187 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 140.3α = 90
b = 51.013β = 104.37
c = 78.547γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling
PHENIXphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-03-09
    Type: Initial release
  • Version 1.1: 2020-02-19
    Changes: Data collection, Database references, Derived calculations