5ETS

S. aureus 6-hydroxymethyl-7,8-dihydropterin pyrophosphokinase complexed with AMPCPP and inhibitor at 1.95 angstrom resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.189 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural Basis for the Selective Binding of Inhibitors to 6-Hydroxymethyl-7,8-dihydropterin Pyrophosphokinase from Staphylococcus aureus and Escherichia coli.

Dennis, M.L.Pitcher, N.P.Lee, M.D.DeBono, A.J.Wang, Z.C.Harjani, J.R.Rahmani, R.Cleary, B.Peat, T.S.Baell, J.B.Swarbrick, J.D.

(2016) J.Med.Chem. 59: 5248-5263

  • DOI: 10.1021/acs.jmedchem.6b00002
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • 6-Hydroxymethyl-7,8-dihydropterin pyrophosphokinase (HPPK) is a member of the folate biosynthesis pathway found in prokaryotes and lower eukaryotes that catalyzes the pyrophosphoryl transfer from the ATP cofactor to a 6-hydroxymethyl-7,8-dihydropteri ...

    6-Hydroxymethyl-7,8-dihydropterin pyrophosphokinase (HPPK) is a member of the folate biosynthesis pathway found in prokaryotes and lower eukaryotes that catalyzes the pyrophosphoryl transfer from the ATP cofactor to a 6-hydroxymethyl-7,8-dihydropterin substrate. We report the chemical synthesis of a series of S-functionalized 8-mercaptoguanine (8MG) analogues as substrate site inhibitors of HPPK and quantify binding against the E. coli and S. aureus enzymes (EcHPPK and SaHPPK). The results demonstrate that analogues incorporating acetophenone-based substituents have comparable affinities for both enzymes. Preferential binding of benzyl-substituted 8MG derivatives to SaHPPK was reconciled when a cryptic pocket unique to SaHPPK was revealed by X-ray crystallography. Differential chemical shift perturbation analysis confirmed this to be a common mode of binding for this series to SaHPPK. One compound (41) displayed binding affinities of 120 nM and 1.76 μM for SaHPPK and EcHPPK, respectively, and represents a lead for the development of more potent and selective inhibitors of SaHPPK.


    Organizational Affiliation

    Monash Institute of Pharmaceutical Sciences, Monash University , Parkville, Victoria 3052, Australia.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
2-amino-4-hydroxy-6-hydroxymethyldihydropteridine pyrophosphokinase
B, A
161Staphylococcus aureus (strain NCTC 8325)Mutation(s): 0 
EC: 2.7.6.3
Find proteins for Q2G0Q5 (Staphylococcus aureus (strain NCTC 8325))
Go to UniProtKB:  Q2G0Q5
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

Download SDF File 
Download CCD File 
A, B
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
5RX
Query on 5RX

Download SDF File 
Download CCD File 
A, B
2-azanyl-8-[(4-chlorophenyl)methylsulfanyl]-1,9-dihydropurin-6-one
C12 H10 Cl N5 O S
MVZVAYOBERRXEC-UHFFFAOYSA-N
 Ligand Interaction
APC
Query on APC

Download SDF File 
Download CCD File 
A, B
DIPHOSPHOMETHYLPHOSPHONIC ACID ADENOSYL ESTER
ALPHA,BETA-METHYLENEADENOSINE-5'-TRIPHOSPHATE
C11 H18 N5 O12 P3
CAWZRIXWFRFUQB-IOSLPCCCSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A, B
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
5RXKd: 1240 nM BINDINGMOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.189 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 47.790α = 90.00
b = 68.580β = 105.94
c = 52.990γ = 90.00
Software Package:
Software NamePurpose
Cootmodel building
Aimlessdata scaling
MOLREPphasing
REFMACrefinement
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-05-04
    Type: Initial release
  • Version 1.1: 2016-06-22
    Type: Database references