2X3U

Ferredoxin-NADP reductase mutant with Tyr 303 replaced by Phe (Y303F)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.93 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.173 
  • R-Value Observed: 0.175 

Starting Model: experimental
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This is version 1.2 of the entry. See complete history


Literature

Role of Specific Residues in Coenzyme Binding, Charge-Transfer Complex Formation, and Catalysis in Anabaena Ferredoxin Nadp(+)-Reductase.

Peregrina, J.R.Sanchez-Azqueta, A.Herguedas, B.Martinez-Julvez, M.Medina, M.

(2010) Biochim Biophys Acta 1797: 1638

  • DOI: https://doi.org/10.1016/j.bbabio.2010.05.006
  • Primary Citation of Related Structures:  
    2X3U

  • PubMed Abstract: 

    Two transient charge-transfer complexes (CTC) form prior and upon hydride transfer (HT) in the reversible reaction of the FAD-dependent ferredoxin-NADP+ reductase (FNR) with NADP+/H, FNR(ox)-NADPH (CTC-1), and FNR(rd)-NADP+ (CTC-2). Spectral properties of both CTCs, as well as the corresponding interconversion HT rates, are here reported for several Anabaena FNR site-directed mutants. The need for an adequate initial interaction between the 2'P-AMP portion of NADP+/H and FNR that provides subsequent conformational changes leading to CTC formation is further confirmed. Stronger interactions between the isoalloxazine and nicotinamide rings might relate with faster HT processes, but exceptions are found upon distortion of the active centre. Thus, within the analyzed FNR variants, there is no strict correlation between the stability of the transient CTCs formation and the rate of the subsequent HT. Kinetic isotope effects suggest that, while in the WT, vibrational enhanced modulation of the active site contributes to the tunnel probability of HT; complexes of some of the active site mutants with the coenzyme hardly allow the relative movement of isoalloxazine and nicotinamide rings along the HT reaction. The architecture of the WT FNR active site precisely contributes to reduce the stacking probability between the isoalloxazine and nicotinamide rings in the catalytically competent complex, modulating the angle and distance between the N5 of the FAD isoalloxazine and the C4 of the coenzyme nicotinamide to values that ensure efficient HT processes.


  • Organizational Affiliation

    Departamento de Bioquímica y Biología Molecular y Celular, Facultad de Ciencias, and Institute of Biocomputation and Physics of Complex Systems (BIFI), Universidad de Zaragoza, E-50009 Zaragoza, Spain.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
FERREDOXIN-NADP REDUCTASE303Nostoc 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
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.93 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.173 
  • R-Value Observed: 0.175 
  • Space Group: P 65
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 86.245α = 90
b = 86.245β = 90
c = 96.19γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-05-26
    Type: Initial release
  • Version 1.1: 2011-12-28
    Changes: Database references, Derived calculations, Non-polymer description, Version format compliance
  • Version 1.2: 2023-12-20
    Changes: Data collection, Database references, Derived calculations, Other, Refinement description