5VW4

Nicotinamide soak of Y316S mutant of corn root ferredoxin:NADP+ reductase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.351 Å
  • R-Value Free: 0.173 
  • R-Value Work: 0.135 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

High-resolution studies of hydride transfer in the ferredoxin:NADP(+) reductase superfamily.

Kean, K.M.Carpenter, R.A.Pandini, V.Zanetti, G.Hall, A.R.Faber, R.Aliverti, A.Karplus, P.A.

(2017) FEBS J. 284: 3302-3319

  • DOI: 10.1111/febs.14190
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Ferredoxin: NADP <sup>+ </sup> reductase (FNR) is an FAD-containing enzyme best known for catalysing the transfer of electrons from ferredoxin (Fd) to NADP <sup>+ </sup> to make NADPH during photosynthesis. It is also the prototype for a broad enzyme ...

    Ferredoxin: NADP + reductase (FNR) is an FAD-containing enzyme best known for catalysing the transfer of electrons from ferredoxin (Fd) to NADP + to make NADPH during photosynthesis. It is also the prototype for a broad enzyme superfamily, including the NADPH oxidases (NOXs) that all catalyse similar FAD-enabled electron transfers between NAD(P)H and one-electron carriers. Here, we define further mechanistic details of the NAD(P)H ⇌ FAD hydride-transfer step of the reaction based on spectroscopic studies and high-resolution (~ 1.5 Å) crystallographic views of the nicotinamide-flavin interaction in crystals of corn root FNR Tyr316Ser and Tyr316Ala variants soaked with either nicotinamide, NADP + , or NADPH. The spectra obtained from FNR crystal complexes match those seen in solution and the complexes reveal active site packing interactions and patterns of covalent distortion of the FAD that imply significant active site compression that would favour catalysis. Furthermore, anisotropic B-factors show that the mobility of the C4 atom of the nicotinamide in the FNR:NADP + complex has a directionality matching that expected for boat-like excursions of the nicotinamide ring thought to enhance hydride transfer. Arguments are made for the relevance of this binding mode to catalysis, and specific consideration is given to how the results extrapolate to provide insight to structure-function relations for the membrane-bound NOX enzymes for which little structural information has been available.


    Organizational Affiliation

    Department of Biochemistry and Biophysics, Oregon State University, Corvallis, OR, USA.,Department of Biosciences, Università degli Studi di Milano, Italy.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Ferredoxin--NADP reductase
A
316Zea maysMutation(s): 1 
Gene Names: 542713
EC: 1.18.1.2
Find proteins for B4G043 (Zea mays)
Go to UniProtKB:  B4G043
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FAD
Query on FAD

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

Download SDF File 
Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
NCA
Query on NCA

Download SDF File 
Download CCD File 
A
NICOTINAMIDE
C6 H6 N2 O
DFPAKSUCGFBDDF-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.351 Å
  • R-Value Free: 0.173 
  • R-Value Work: 0.135 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 58.894α = 90.00
b = 58.894β = 90.00
c = 184.812γ = 120.00
Software Package:
Software NamePurpose
SCALAdata scaling
iMOSFLMdata reduction
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical SciencesUnited StatesR01-GM119227
National Science Foundation (United States)United StatesMCB-9982727

Revision History 

  • Version 1.0: 2017-08-23
    Type: Initial release
  • Version 1.1: 2017-10-11
    Type: Database references