1TX2

Dihydropteroate Synthetase, With Bound Inhibitor MANIC, From Bacillus anthracis


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.83 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.182 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Crystal Structure of 7,8-Dihydropteroate Synthase from Bacillus anthracis; Mechanism and Novel Inhibitor Design.

Babaoglu, K.Qi, J.Lee, R.E.White, S.W.

(2004) STRUCTURE 12: 1705-1717

  • DOI: 10.1016/j.str.2004.07.011
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Dihydropterate synthase (DHPS) is the target for the sulfonamide class of antibiotics, but increasing resistance has encouraged the development of new therapeutic agents against this enzyme. One approach is to identify molecules that occupy the pteri ...

    Dihydropterate synthase (DHPS) is the target for the sulfonamide class of antibiotics, but increasing resistance has encouraged the development of new therapeutic agents against this enzyme. One approach is to identify molecules that occupy the pterin binding pocket which is distinct from the pABA binding pocket that binds sulfonamides. Toward this goal, we present five crystal structures of DHPS from Bacillus anthracis, a well-documented bioterrorism agent. Three DHPS structures are already known, but our B. anthracis structures provide new insights into the enzyme mechanism. We show how an arginine side chain mimics the pterin ring in binding within the pterin binding pocket. The structures of two substrate analog complexes and the first structure of a DHPS-product complex offer new insights into the catalytic mechanism and the architecture of the pABA binding pocket. Finally, as an initial step in the development of pterin-based inhibitors, we present the structure of DHPS complexed with 5-nitro-6-methylamino-isocytosine.


    Organizational Affiliation

    Department of Structural Biology, St Jude Children's Research Hospital, Memphis, TN 38105, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DHPS, Dihydropteroate synthase
A, B
297Bacillus anthracisMutation(s): 0 
Gene Names: folP
EC: 2.5.1.15
Find proteins for Q81VW8 (Bacillus anthracis)
Go to UniProtKB:  Q81VW8
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
680
Query on 680

Download SDF File 
Download CCD File 
A, B
6-METHYLAMINO-5-NITROISOCYTOSINE
C5 H7 N5 O3
NMCMUSAXKISTKW-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.83 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.182 
  • Space Group: P 62 2 2
Unit Cell:
Length (Å)Angle (°)
a = 98.387α = 90.00
b = 98.387β = 90.00
c = 263.235γ = 120.00
Software Package:
Software NamePurpose
CNSphasing
MAR345data collection
REFMACrefinement
CCP4data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-09-14
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Advisory, Derived calculations, Refinement description, Source and taxonomy, Version format compliance
  • Version 1.3: 2017-10-11
    Type: Refinement description