2X0K

Crystal structure of modular FAD synthetase from Corynebacterium ammoniagenes


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.204 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Oligomeric State in the Crystal Structure of Modular Fad Synthetase Provides Insights Into its Sequential Catalysis in Prokaryotes

Herguedas, B.Martinez-Julvez, M.Frago, S.Medina, M.Hermoso, J.A.

(2010) J.Mol.Biol. 400: 218

  • DOI: 10.1016/j.jmb.2010.05.018

  • PubMed Abstract: 
  • The crystal structure of the modular flavin adenine dinucleotide (FAD) synthetase from Corynebacterium ammoniagenes has been solved at 1.95 A resolution. The structure of C. ammoniagenes FAD synthetase presents two catalytic modules-a C-terminus with ...

    The crystal structure of the modular flavin adenine dinucleotide (FAD) synthetase from Corynebacterium ammoniagenes has been solved at 1.95 A resolution. The structure of C. ammoniagenes FAD synthetase presents two catalytic modules-a C-terminus with ATP-riboflavin kinase activity and an N-terminus with ATP-flavin mononucleotide (FMN) adenylyltransferase activity-that are responsible for the synthesis of FAD from riboflavin in two sequential steps. In the monomeric structure, the active sites from both modules are placed 40 A away, preventing the direct transfer of the product from the first reaction (FMN) to the second catalytic site, where it acts as substrate. Crystallographic and biophysical studies revealed a hexameric assembly formed by the interaction of two trimers. Each trimer presents a head-tail configuration, with FMN adenylyltransferase and riboflavin kinase modules from different protomers approaching the active sites and allowing the direct transfer of FMN. Experimental results provide molecular-level evidences of the mechanism of the synthesis of FMN and FAD in prokaryotes in which the oligomeric state could be involved in the regulation of the catalytic efficiency of the modular enzyme.


    Organizational Affiliation

    Departamento de Bioquímica y Biología Molecular y Celular, Facultad de Ciencias, Universidad de Zaragoza, 50009 Zaragoza, Spain.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
RIBOFLAVIN BIOSYNTHESIS PROTEIN RIBF
A, B
338Corynebacterium ammoniagenesMutation(s): 0 
Gene Names: ribF
Find proteins for Q59263 (Corynebacterium ammoniagenes)
Go to UniProtKB:  Q59263
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
PPV
Query on PPV

Download SDF File 
Download CCD File 
A, B
PYROPHOSPHATE
H4 O7 P2
XPPKVPWEQAFLFU-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.204 
  • Space Group: P 21 3
Unit Cell:
Length (Å)Angle (°)
a = 133.472α = 90.00
b = 133.472β = 90.00
c = 133.472γ = 90.00
Software Package:
Software NamePurpose
SHELXphasing
REFMACrefinement
SCALAdata scaling
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-05-26
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance