1AJ0

CRYSTAL STRUCTURE OF A TERNARY COMPLEX OF E. COLI DIHYDROPTEROATE SYNTHASE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Work: 0.206 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of the anti-bacterial sulfonamide drug target dihydropteroate synthase.

Achari, A.Somers, D.O.Champness, J.N.Bryant, P.K.Rosemond, J.Stammers, D.K.

(1997) Nat.Struct.Mol.Biol. 4: 490-497

  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Sulfonamides were amongst the first clinically useful antibacterial agents to be discovered. The identification of sulfanilamide as the active component of the dye Prontosil rubrum led to the synthesis of clinically useful analogues. Today sulfametho ...

    Sulfonamides were amongst the first clinically useful antibacterial agents to be discovered. The identification of sulfanilamide as the active component of the dye Prontosil rubrum led to the synthesis of clinically useful analogues. Today sulfamethoxazole (in combination with trimethoprim), is used to treat urinary tract infections caused by bacteria such as Escherichia coli and is also a first-line treatment for pneumonia caused by the fungus Pneumocystis carinii, a common condition in AIDS patients. The site of action is the de novo folate biosynthesis enzyme dihydropteroate synthase (DHPS) where sulfonamides act as analogues of one of the substrates, para-aminobenzoic acid (pABA). We report here the crystal structure of E.coli DHPS at 2.0 A resolution refined to an R-factor of 0.185. The single domain of 282 residues forms an eight-stranded alpha/beta-barrel. The 7,8-dihydropterin pyrophosphate (DHPPP) substrate binds in a deep cleft in the barrel, whilst sulfanilamide binds closer to the surface. The DHPPP ligand site is highly conserved amongst prokaryotic and eukaryotic DHPSs.


    Organizational Affiliation

    Glaxo Wellcome Research & Development, Beckenham, Kent, UK. aa37795@ggr.co.uk




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DIHYDROPTEROATE SYNTHASE
A
282Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: folP (dhpS)
EC: 2.5.1.15
Find proteins for P0AC13 (Escherichia coli (strain K12))
Go to UniProtKB:  P0AC13
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
PH2
Query on PH2

Download SDF File 
Download CCD File 
A
2-AMINO-6-HYDROXYMETHYL-7,8-DIHYDRO-3H-PTERIDIN-4-ONE
C7 H9 N5 O2
CQQNNQTXUGLUEV-UHFFFAOYSA-N
 Ligand Interaction
SAN
Query on SAN

Download SDF File 
Download CCD File 
A
SULFANILAMIDE
C6 H8 N2 O2 S
FDDDEECHVMSUSB-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Work: 0.206 
  • Space Group: C 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 92.910α = 90.00
b = 60.670β = 114.67
c = 59.820γ = 90.00
Software Package:
Software NamePurpose
XENGENdata scaling
XENGENdata reduction
PROFFTrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-05-20
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance