Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly 2  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 145.13 kDa 
• Atom Count: 7780 
• Modelled Residue Count: 946 
• Deposited Residue Count: 1280 
• Unique protein chains: 1

5GXU

Cystal structure of Arabidopsis ATR2

• PDB DOI: 10.2210/pdb5GXU/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Arabidopsis thaliana
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2016-09-20 Released: 2017-01-25 
• Deposition Author(s): Niu, G., Liu, L.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.248 
• R-Value Work: 0.200 
• R-Value Observed: 0.202 

Literature

Structure of the Arabidopsis thaliana NADPH-cytochrome P450 reductase 2 (ATR2) provides insight into its function

Niu, G., Zhao, S., Wang, L., Dong, W., Liu, L., He, Y.

(2017) FEBS J 284: 754-765

• PubMed: 28103421 
• DOI: 10.1111/febs.14017
• Primary Citation of Related Structures:  
  5GXU


• PubMed Abstract: 
  

Members of the cytochrome P450 family catalyze a variety of mono-oxygenase reactions, and for the eukaryotic membrane-bound members, NADPH is typically used as the reducing agent. The flavoprotein NADPH-cytochrome P450 reductase (CPR) enables electron transfer from NADPH to cytochrome P450 via its flavin cofactors. ATR2 is one of the two authentic CPR genes in the genome of the model plant Arabidopsis thaliana, and its product has been physiologically and kinetically characterized. Here, we report the 2.3 Å structure of Arabidopsis thaliana NADPH-cytochrome P450 reductase 2 (ATR2) and find that the position of the two flavin cofactors differs from that of other known CPR structures. Mutation of residues related to possible interflavin electron transfer retains the reductase activity of ATR2, which suggests a direct electron transfer pathway between the flavins. In contrast, mutation of a single residue (R708) mediating interdomain interaction abolishes this activity. Because this residue is only conserved in plant CPRs, we speculate a plant-specific working mechanism as observed in ATR2.

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Organizational Affiliation: 

College of Life Sciences, Capital Normal University, Beijing, China.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
NADPH--cytochrome P450 reductase 2	A, B	640	Arabidopsis thaliana	Mutation(s): 0  Gene Names: ATR2, AR2, At4g30210, F9N11.60 EC: 1.6.2.4
UniProt
Find proteins for Q9SUM3 (Arabidopsis thaliana) Explore Q9SUM3  Go to UniProtKB:  Q9SUM3

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
FAD	D [auth A], E [auth B]	FLAVIN-ADENINE DINUCLEOTIDE C27 H33 N9 O15 P2 VWWQXMAJTJZDQX-UYBVJOGSSA-N
FMN	C [auth A]	FLAVIN MONONUCLEOTIDE C17 H21 N4 O9 P FVTCRASFADXXNN-SCRDCRAPSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.248 
• R-Value Work: 0.200 
• R-Value Observed: 0.202 
• Space Group: P 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 55.333	α = 97.84
b = 61.821	β = 100.51
c = 88.331	γ = 90.27

Software Package:

Software Name	Purpose
PHENIX	refinement
HKL-2000	data collection
HKL-2000	data scaling
PHASER	phasing
PDB_EXTRACT	data extraction
HKL-2000	data reduction

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2016-09-20 
• Released Date: 2017-01-25 
Deposition Author(s): Niu, G., Liu, L.

Revision History  

• Version 1.0: 2017-01-25
  Type: Initial release
  
• Version 1.1: 2017-02-15
  Changes: Database references
• Version 1.2: 2017-03-15
  Changes: Database references