2VP8

Structure of Mycobacterium tuberculosis Rv1207


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.64 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.223 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Biochemical and Structural Characterization of the Putative Dihydropteroate Synthase Ortholog Rv1207 of Mycobacterium Tuberculosis.

Gengenbacher, M.Xu, T.Niyomwattanakit, P.Spraggon, G.Dick, T.

(2008) Fems Microbiol.Lett. 287: 128

  • DOI: 10.1111/j.1574-6968.2008.01302.x

  • PubMed Abstract: 
  • Dihydropteroate synthase (DHPS) is involved in de novo biosynthesis of the essential cofactor folate by catalyzing the condensation of para-aminobenzoic acid (pABA) and 6-hydroxymethyl-7,8-dihydropterin-pyrophosphate (H2PtPP). Mycobacterium tuberculo ...

    Dihydropteroate synthase (DHPS) is involved in de novo biosynthesis of the essential cofactor folate by catalyzing the condensation of para-aminobenzoic acid (pABA) and 6-hydroxymethyl-7,8-dihydropterin-pyrophosphate (H2PtPP). Mycobacterium tuberculosis possesses a functional DHPS (MtDHPS, Rv3608c, folP1) and, based on sequence similarities, a putative ortholog (Rv1207, folP2). Here, we demonstrate that Rv1207 shows a low H2PtPP substrate affinity and lacks enzymatic DHPS activity. However, we found dapsone, a structural analog of pABA and clinically used DHPS inhibitor, to weakly bind both proteins. To gain insights into the lack of DHPS activity of Rv1207, its three-dimensional structure was determined at 2.64 A. The overall fold of both, MtDHPS (1EYE) and Rv1207, is highly conserved and conforms to a classical triosephosphate isomerase barrel arrangement. The predicted H2PtPP-binding pocket of Rv1207 is occupied by a histidine side chain, relative to a leucine residue in MtDHPS, consistent with the low affinity for this substrate and the lack of DHPS activity. We conclude that folP2 does not encode a DHPS and therefore cannot act as bypass for folP1. The metabolic function of Rv1207 remains to be defined.


    Related Citations: 
    • Crystal Structure of Mycobacterium Tuberculosis 6-Hydroxymethyl-7,8-Dihydropteroate Synthase in Complex with Pterin Monophosphate: New Insight Into the Enzymatic Mechanism and Sulfa-Drug Action
      Baca, A.M.,Sirawaraporn, R.,Turley, S.,Sirawaraporn, W.,Hol, W.G.J.
      (2000) J.Mol.Biol. 302: 1193


    Organizational Affiliation

    Novartis Institute for Tropical Diseases Pte Ltd, Singapore. martin.gengenbacher@novartis.com




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DIHYDROPTEROATE SYNTHASE 2
A, B
318Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)Mutation(s): 0 
Gene Names: folP2
Find proteins for P9WNC9 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Go to UniProtKB:  P9WNC9
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EDO
Query on EDO

Download SDF File 
Download CCD File 
A, B
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.64 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.223 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 80.727α = 90.00
b = 80.727β = 90.00
c = 215.938γ = 120.00
Software Package:
Software NamePurpose
MOLREPphasing
SCALAdata scaling
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-08-12
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance