1B2R

FERREDOXIN-NADP+ REDUCTASE (MUTATION: E 301 A)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.190 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural basis of the catalytic role of Glu301 in Anabaena PCC 7119 ferredoxin-NADP+ reductase revealed by x-ray crystallography.

Mayoral, T.Medina, M.Sanz-Aparicio, J.Gomez-Moreno, C.Hermoso, J.A.

(2000) Proteins 38: 60-69


  • PubMed Abstract: 
  • The three-dimensional crystal structure of the Glu301Ala site-directed mutant of ferredoxin-NADP+ reductase from Anabaena PCC 7119 has been determined at 1.8A resolution by x-ray diffraction. The overall folding of the Glu301Ala FNR mutant shows no s ...

    The three-dimensional crystal structure of the Glu301Ala site-directed mutant of ferredoxin-NADP+ reductase from Anabaena PCC 7119 has been determined at 1.8A resolution by x-ray diffraction. The overall folding of the Glu301Ala FNR mutant shows no significant differences with respect to that of the wild-type enzyme. However, interesting conformational changes are detected in the side chain of another glutamate residue, Glu139, which now points towards the FAD cofactor in the active center cavity. The new conformation of the Glu139 side chain is stabilized by a network of five hydrogen bonds to several water molecules, which seem to hold the carboxylate side chain in a rather fixed position. This interacting network connects the Glu139 side chain to the Ser80 side chain through a series of three water molecules. These observations are discussed in terms of the reactivity of Glu301Ala ferredoxin-NADP+ reductase towards its substrates, and the role of Glu301 in the catalysis is re-examined. Moreover, a structural explanation of the different reoxidation properties of this mutant is given on the basis of the reported structure by modeling the hypothetical flavin C(4a)-hydroperoxide intermediate. The model shows that the distal oxygen of the peroxide anion could be in an appropriate situation to act as the proton donor in the reoxidation process.


    Related Citations: 
    • X-Ray Structure of the Ferredoxin:NADP+ Reductase from the Cyanobacterium Anabanena PCC 7119 at 1.8 Angstroms Resolution, and Crystallographic Studies of NADP+ Binding at 2.25 Angstroms Resolution
      Serre, L.,Vellieux, F.M.,Medina, M.,Gomez-Moreno, C.,Fontecilla-Camps, J.C.,Frey, M.
      (1996) J.Mol.Biol. 263: 20


    Organizational Affiliation

    Grupo de Cristalografía Macromolecular y Biología Estructural, Instituto Química-Física Rocasolano, CSIC, Madrid, Spain.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PROTEIN (FERREDOXIN-NADP+ REDUCTASE)
A
304Nostoc sp. (strain ATCC 29151 / PCC 7119)Gene Names: petH
EC: 1.18.1.2
Find proteins for P21890 (Nostoc sp. (strain ATCC 29151 / PCC 7119))
Go to UniProtKB:  P21890
Small Molecules
Ligands 2 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
FAD
Query on FAD

Download SDF File 
Download CCD File 
A
FLAVIN-ADENINE DINUCLEOTIDE
C27 H33 N9 O15 P2
VWWQXMAJTJZDQX-UYBVJOGSSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.190 
  • Space Group: P 65
Unit Cell:
Length (Å)Angle (°)
a = 86.650α = 90.00
b = 86.650β = 90.00
c = 96.260γ = 120.00
Software Package:
Software NamePurpose
X-PLORrefinement
MOSFLMdata reduction
AMoREphasing
CCP4data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-12-15
    Type: Initial release
  • Version 1.1: 2008-04-26
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Source and taxonomy, Version format compliance