4Q9N

Crystal structure of Chlamydia trachomatis enoyl-ACP reductase (FabI) in complex with NADH and AFN-1252


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.795 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.186 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Type II Fatty Acid Synthesis Is Essential for the Replication of Chlamydia trachomatis.

Yao, J.Abdelrahman, Y.M.Robertson, R.M.Cox, J.V.Belland, R.J.White, S.W.Rock, C.O.

(2014) J.Biol.Chem. 289: 22365-22376

  • DOI: 10.1074/jbc.M114.584185

  • PubMed Abstract: 
  • The major phospholipid classes of the obligate intracellular bacterial parasite Chlamydia trachomatis are the same as its eukaryotic host except that they also contain chlamydia-made branched-chain fatty acids in the 2-position. Genomic analysis pred ...

    The major phospholipid classes of the obligate intracellular bacterial parasite Chlamydia trachomatis are the same as its eukaryotic host except that they also contain chlamydia-made branched-chain fatty acids in the 2-position. Genomic analysis predicts that C. trachomatis is capable of type II fatty acid synthesis (FASII). AFN-1252 was deployed as a chemical tool to specifically inhibit the enoyl-acyl carrier protein reductase (FabI) of C. trachomatis to determine whether chlamydial FASII is essential for replication within the host. The C. trachomatis FabI (CtFabI) is a homotetramer and exhibited typical FabI kinetics, and its expression complemented an Escherichia coli fabI(Ts) strain. AFN-1252 inhibited CtFabI by binding to the FabI·NADH complex with an IC50 of 0.9 μM at saturating substrate concentration. The x-ray crystal structure of the CtFabI·NADH·AFN-1252 ternary complex revealed the specific interactions between the drug, protein, and cofactor within the substrate binding site. AFN-1252 treatment of C. trachomatis-infected HeLa cells at any point in the infectious cycle caused a decrease in infectious titers that correlated with a decrease in branched-chain fatty acid biosynthesis. AFN-1252 treatment at the time of infection prevented the first cell division of C. trachomatis, although the cell morphology suggested differentiation into a metabolically active reticulate body. These results demonstrate that FASII activity is essential for C. trachomatis proliferation within its eukaryotic host and validate CtFabI as a therapeutic target against C. trachomatis.


    Organizational Affiliation

    From the Departments of Infectious Diseases and.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Enoyl-[acyl-carrier-protein] reductase [NADH]
A, B, C, D, E, F, G, H
298N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAI
Query on NAI

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G, H
1,4-DIHYDRONICOTINAMIDE ADENINE DINUCLEOTIDE
NADH
C21 H29 N7 O14 P2
BOPGDPNILDQYTO-NNYOXOHSSA-N
 Ligand Interaction
0WE
Query on 0WE

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G, H
N-methyl-N-[(3-methyl-1-benzofuran-2-yl)methyl]-3-(7-oxo-5,6,7,8-tetrahydro-1,8-naphthyridin-3-yl)propanamide
C22 H23 N3 O3
WDNCPCMRTFYNIQ-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
0WEIC50: 950 nM BINDINGMOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.795 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.186 
  • Space Group: P 43
Unit Cell:
Length (Å)Angle (°)
a = 96.146α = 90.00
b = 96.146β = 90.00
c = 263.082γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data scaling
DENZOdata reduction
PHASERphasing
SCALEPACKdata scaling
PDB_EXTRACTdata extraction
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-06-25
    Type: Initial release
  • Version 1.1: 2014-08-27
    Type: Database references
  • Version 1.2: 2017-11-22
    Type: Refinement description