1GR1

Structure of Ferredoxin-NADP+ Reductase with Glu 139 replaced by Lys (E139K)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.180 
  • R-Value Observed: 0.180 

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This is version 1.3 of the entry. See complete history


Literature

Probing the Role of Glutamic Acid 139 of Anabena Ferrodoxin-Nadp+ Reductase in the Interaction with Substrates

Faro, M.Frago, S.Mayoral, T.Hermoso, J.A.Sanz-Aparico, J.Gomez-Moreno, C.Medina, M.

(2002) Eur J Biochem 269: 4938

  • DOI: 10.1046/j.1432-1033.2002.03194.x
  • Primary Citation of Related Structures:  
    1GR1

  • PubMed Abstract: 
  • The role of the negative charge of the E139 side-chain of Anabaena Ferredoxin-NADP+ reductase (FNR) in steering appropriate docking with its substrates ferredoxin, flavodoxin and NADP+/H, that leads to efficient electron transfer (ET) is analysed by characterization of several E139 FNR mutants ...

    The role of the negative charge of the E139 side-chain of Anabaena Ferredoxin-NADP+ reductase (FNR) in steering appropriate docking with its substrates ferredoxin, flavodoxin and NADP+/H, that leads to efficient electron transfer (ET) is analysed by characterization of several E139 FNR mutants. Replacement of E139 affects the interaction with the different FNR substrates in very different ways. Thus, while E139 does not appear to be involved in the processes of binding and ET between FNR and NADP+/H, the nature and the conformation of the residue at position 139 of Anabaena FNR modulates the precise enzyme interaction with the protein carriers ferredoxin (Fd) and flavodoxin (Fld). Introduction of the shorter aspartic acid side-chain at position 139 produces an enzyme that interacts more weakly with both ET proteins. Moreover, the removal of the charge, as in the E139Q mutant, or the charge-reversal mutation, as in E139K FNR, apparently enhances additional interaction modes of the enzyme with Fd, and reduces the possible orientations with Fld to more productive and stronger ones. Hence, removal of the negative charge at position 139 of Anabaena FNR produces a deleterious effect in its ET reactions with Fd whereas it appears to enhance the ET processes with Fld. Significantly, a large structural variation is observed for the E139 side-chain conformer in different FNR structures, including the E139K mutant. In this case, a positive potential region replaces a negative one in the wild-type enzyme. Our observations further confirm the contribution of both attractive and repulsive interactions in achieving the optimal orientation for efficient ET between FNR and its protein carriers.


    Related Citations: 
    • X-Ray Structure of the Ferredoxin:Nadp+ Reductase from the Cyanobacterium Anabanena Pcc 7119 at 1.8A Resolution, and Crystallographic Studies of Nadp Binding at 2.25A Resolution
      Serre, L., Vellieux, F.M.D., Medina, M., Gomez-Moreno, C., Fontecilla, 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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
FERREDOXIN--NADP+ REDUCTASE A303Nostoc sp. PCC 7119Mutation(s): 1 
Gene Names: petH
EC: 1.18.1.2
Find proteins for P21890 (Nostoc sp. (strain ATCC 29151 / PCC 7119))
Explore P21890 
Go to UniProtKB:  P21890
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FAD
Query on FAD

Download Ideal Coordinates CCD File 
A
FLAVIN-ADENINE DINUCLEOTIDE
C27 H33 N9 O15 P2
VWWQXMAJTJZDQX-UYBVJOGSSA-N
 Ligand Interaction
SO4
Query on SO4

Download Ideal Coordinates CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.180 
  • R-Value Observed: 0.180 
  • Space Group: P 65
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 87.03α = 90
b = 87.03β = 90
c = 96.37γ = 120
Software Package:
Software NamePurpose
X-PLORrefinement
MOSFLMdata reduction
SCALAdata scaling
AMoREphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-10-24
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2019-05-22
    Changes: Data collection, Other, Refinement description