5LJI

Streptococcus pneumonia TIGR4 flavodoxin: structural and biophysical characterization of a novel drug target


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.07 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.189 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Streptococcus pneumoniae TIGR4 Flavodoxin: Structural and Biophysical Characterization of a Novel Drug Target.

Rodriguez-Cardenas, A.Rojas, A.L.Conde-Gimenez, M.Velazquez-Campoy, A.Hurtado-Guerrero, R.Sancho, J.

(2016) PLoS One 11: e0161020-e0161020

  • DOI: 10.1371/journal.pone.0161020
  • Primary Citation of Related Structures:  
    5LJL, 5LJI

  • PubMed Abstract: 
  • Streptococcus pneumoniae (Sp) strain TIGR4 is a virulent, encapsulated serotype that causes bacteremia, otitis media, meningitis and pneumonia. Increased bacterial resistance and limited efficacy of the available vaccine to some serotypes complicate the treatment of diseases associated to this microorganism ...

    Streptococcus pneumoniae (Sp) strain TIGR4 is a virulent, encapsulated serotype that causes bacteremia, otitis media, meningitis and pneumonia. Increased bacterial resistance and limited efficacy of the available vaccine to some serotypes complicate the treatment of diseases associated to this microorganism. Flavodoxins are bacterial proteins involved in several important metabolic pathways. The Sp flavodoxin (Spfld) gene was recently reported to be essential for the establishment of meningitis in a rat model, which makes SpFld a potential drug target. To facilitate future pharmacological studies, we have cloned and expressed SpFld in E. coli and we have performed an extensive structural and biochemical characterization of both the apo form and its active complex with the FMN cofactor. SpFld is a short-chain flavodoxin containing 146 residues. Unlike the well-characterized long-chain apoflavodoxins, the Sp apoprotein displays a simple two-state thermal unfolding equilibrium and binds FMN with moderate affinity. The X-ray structures of the apo and holo forms of SpFld differ at the FMN binding site, where substantial rearrangement of residues at the 91-100 loop occurs to permit cofactor binding. This work will set up the basis for future studies aiming at discovering new potential drugs to treat S. pneumoniae diseases through the inhibition of SpFld.


    Organizational Affiliation

    Aragon Health Research Institute (IIS Aragón), University of Zaragoza, Zaragoza, Spain.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
FlavodoxinA, B [auth C]148Streptococcus pneumoniaeMutation(s): 0 
Gene Names: AWW74_08705
Find proteins for Q8DPG4 (Streptococcus pneumoniae (strain ATCC BAA-255 / R6))
Explore Q8DPG4 
Go to UniProtKB:  Q8DPG4
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B [auth C]L-PEPTIDE LINKINGC5 H11 N O2 SeMET
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
FMNKd:  83   nM  Binding MOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.07 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.189 
  • Space Group: H 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 101.676α = 90
b = 101.676β = 90
c = 68.285γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
PHENIXphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
MINECOSpainBFU2013-47064-P
MINECOSpainBFU2010-19504
MINECOSpainCTQ2013-44367-C2-2-P

Revision History  (Full details and data files)

  • Version 1.0: 2016-08-31
    Type: Initial release
  • Version 1.1: 2016-09-28
    Changes: Database references