1BJK

FERREDOXIN:NADP+ REDUCTASE MUTANT WITH ARG 264 REPLACED BY GLU (R264E)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.166 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Role of Arg100 and Arg264 from Anabaena PCC 7119 ferredoxin-NADP+ reductase for optimal NADP+ binding and electron transfer.

Martinez-Julvez, M.Hermoso, J.Hurley, J.K.Mayoral, T.Sanz-Aparicio, J.Tollin, G.Gomez-Moreno, C.Medina, M.

(1998) Biochemistry 37: 17680-17691


  • PubMed Abstract: 
  • Previous studies and the crystal structure of Anabaena PCC 7119 FNR suggest that the side chains of Arg100 and Arg264 may be directly involved in the proper NADP+/NADPH orientation for an efficient electron-transfer reaction. Protein engineering on A ...

    Previous studies and the crystal structure of Anabaena PCC 7119 FNR suggest that the side chains of Arg100 and Arg264 may be directly involved in the proper NADP+/NADPH orientation for an efficient electron-transfer reaction. Protein engineering on Arg100 and Arg264 from Anabaena PCC 7119 FNR has been carried out to investigate their roles in complex formation and electron transfer to NADP+ and to ferredoxin/flavodoxin. Arg100 has been replaced with an alanine, which removes the positive charge, the long side chain, as well as the ability to form hydrogen bonds, while a charge reversal mutation has been made at Arg264 by replacing it with a glutamic acid. Results with various spectroscopic techniques indicate that the mutated proteins folded properly and that significant protein structural rearrangements did not occur. Both mutants have been kinetically characterized by steady-state as well as fast transient kinetic techniques, and the three-dimensional structure of Arg264Glu FNR has been solved. The results reported herein reveal important conceptual information about the interaction of FNR with its substrates. A critical role is confirmed for the long, positively charged side chain of Arg100. Studies on the Arg264Glu FNR mutant demonstrate that the Arg264 side chain is not critical for the nicotinamide orientation or for nicotinamide interaction with the isoalloxazine FAD moiety. However, this mutant showed altered behavior in its interaction and electron transfer with its protein partners, ferredoxin and flavodoxin.


    Related Citations: 
    • X-Ray Structure of the Ferredoxin:Nadp+ Reductase from the Cyanobacterium Anabaena Pcc 7119 at 1.8 A Resolution, and Crystallographic Studies of Nadp+ Binding at 2.25 A 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

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
FERREDOXIN--NADP+ REDUCTASE
A
295Nostoc sp. (strain ATCC 29151 / PCC 7119)Mutation(s): 1 
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: 2.3 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.166 
  • Space Group: P 65
Unit Cell:
Length (Å)Angle (°)
a = 88.090α = 90.00
b = 88.090β = 90.00
c = 97.210γ = 120.00
Software Package:
Software NamePurpose
CCP4data scaling
MOSFLMdata reduction
AMoREphasing
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-11-04
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Source and taxonomy, Version format compliance