3UWK

Structure Guided Development of Novel Thymidine Mimetics targeting Pseudomonas aeruginosa Thymidylate Kinase: from Hit to Lead Generation


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.91 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.195 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure guided development of novel thymidine mimetics targeting Pseudomonas aeruginosa thymidylate kinase: from hit to lead generation.

Choi, J.Y.Plummer, M.S.Starr, J.Desbonnet, C.R.Soutter, H.Chang, J.Miller, J.R.Dillman, K.Miller, A.A.Roush, W.R.

(2012) J.Med.Chem. 55: 852-870

  • DOI: 10.1021/jm201349f
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Thymidylate kinase (TMK) is a potential chemotherapeutic target because it is directly involved in the synthesis of an essential component, thymidine triphosphate, in DNA replication. All reported TMK inhibitors are thymidine analogues, which might r ...

    Thymidylate kinase (TMK) is a potential chemotherapeutic target because it is directly involved in the synthesis of an essential component, thymidine triphosphate, in DNA replication. All reported TMK inhibitors are thymidine analogues, which might retard their development as potent therapeutics due to cell permeability and off-target activity against human TMK. A small molecule hit (1, IC(50) = 58 μM), which has reasonable inhibition potency against Pseudomonas aeruginosa TMK (PaTMK), was identified by the analysis of the binding mode of thymidine or TP(5)A in a PaTMK homology model. This hit (1) was cocrystallized with PaTMK, and several potent PaTMK inhibitors (leads, 46, 47, 48, and 56, IC(50) = 100-200 nM) were synthesized using computer-aided design approaches including virtual synthesis/screening, which was used to guide the design of inhibitors. The binding mode of the optimized leads in PaTMK overlaps with that of other bacterial TMKs but not with human TMK, which shares few common features with the bacterial enzymes. Therefore, the optimized TMK inhibitors described here should be useful for the development of antibacterial agents targeting TMK without undesired off-target effects. In addition, an inhibition mechanism associated with the LID loop, which mimics the process of phosphate transfer from ATP to dTMP, was proposed based on X-ray cocrystal structures, homology models, and structure-activity relationship results.


    Organizational Affiliation

    Department of Chemistry, Scripps Florida, Jupiter, Florida 33458, United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Thymidylate kinase
A, B
232Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1)Mutation(s): 0 
Gene Names: tmk
EC: 2.7.4.9
Find proteins for Q9HZN8 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Go to UniProtKB:  Q9HZN8
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
0DF
Query on 0DF

Download SDF File 
Download CCD File 
A, B
1-methyl-6-phenyl-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one
C13 H11 N3 O
PDYMCBRGMDRAPX-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
0DFIC50: 58000 nM BINDINGMOAD
0DFIC50: 58000 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.91 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.195 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 74.341α = 90.00
b = 118.063β = 90.00
c = 41.918γ = 90.00
Software Package:
Software NamePurpose
MOLREPphasing
HKL-2000data reduction
JDirectordata collection
HKL-2000data scaling
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-02-01
    Type: Initial release
  • Version 1.1: 2012-11-14
    Type: Database references