1H85

FERREDOXIN:NADP+ REDUCTASE MUTANT WITH VAL 136 REPLACED BY LEU (V136L)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.210 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Role of a Cluster of Hydrophobic Residues Near the Fad Cofactor in Anabaena Pcc 7119 Ferredoxin-Nadp+ Reductase for Optimal Complex Formation and Electron Transfer to Ferredoxin

Marti-Nez-Julvez, M.Nogues, I.Faro, M.Hurley, J.K.Brodie, T.B.Mayoral, T.Sanz-Aparicio, J.Hermoso, J.A.Stankovich, M.T.Medina, M.Tollin, G.Gomez-Moreno, C.

(2001) J Biol Chem 276: 27498

  • DOI: https://doi.org/10.1074/jbc.M102112200
  • Primary Citation of Related Structures:  
    1H85, 1QGZ, 1QH0

  • PubMed Abstract: 

    In the ferredoxin-NADP(+) reductase (FNR)/ferredoxin (Fd) system, an aromatic amino acid residue on the surface of Anabaena Fd, Phe-65, has been shown to be essential for the electron transfer (ET) reaction. We have investigated further the role of hydrophobic interactions in complex stabilization and ET between these proteins by replacing three hydrophobic residues, Leu-76, Leu-78, and Val-136, situated on the FNR surface in the vicinity of its FAD cofactor. Whereas neither the ability of FNR to accept electrons from NADPH nor its structure appears to be affected by the introduced mutations, different behaviors with Fd are observed. Thus, the ET interaction with Fd is almost completely lost upon introduction of negatively charged side chains. In contrast, only subtle changes are observed upon conservative replacement. Introduction of Ser residues produces relatively sizable alterations of the FAD redox potential, which can explain the modified behavior of these mutants. The introduction of bulky aromatic side chains appears to produce rearrangements of the side chains at the FNR/Fd interaction surface. Thus, subtle changes in the hydrophobic patch influence the rates of ET to and from Fd by altering the binding constants and the FAD redox potentials, indicating that these residues are especially important in the binding and orientation of Fd for efficient ET. These results are consistent with the structure reported for the Anabaena FNR.Fd complex.


  • Organizational Affiliation

    Departamento de Bioquimica y Biologia Molecular y Celular, Facultad de Ciencias, Universidad de Zaragoza, 50009-Zaragoza, Spain.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
FERREDOXIN--NADP REDUCTASE295Nostoc sp. PCC 7119Mutation(s): 1 
EC: 1.18.1.2
UniProt
Find proteins for P21890 (Nostoc sp. (strain ATCC 29151 / PCC 7119))
Explore P21890 
Go to UniProtKB:  P21890
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP21890
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
FAD
Query on FAD

Download Ideal Coordinates CCD File 
B [auth A]FLAVIN-ADENINE DINUCLEOTIDE
C27 H33 N9 O15 P2
VWWQXMAJTJZDQX-UYBVJOGSSA-N
SO4
Query on SO4

Download Ideal Coordinates CCD File 
C [auth A]SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.210 
  • Space Group: P 65
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 86.65α = 90
b = 86.65β = 90
c = 96.55γ = 120
Software Package:
Software NamePurpose
X-PLORrefinement
MOSFLMdata reduction
SCALAdata scaling
AMoREphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-11-28
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Source and taxonomy, Version format compliance
  • Version 1.2: 2019-05-22
    Changes: Data collection, Other, Refinement description
  • Version 1.3: 2023-12-13
    Changes: Data collection, Database references, Derived calculations, Refinement description