5GXU

Cystal structure of Arabidopsis ATR2

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 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history. 


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

  • DOI: 10.1111/febs.14017
  • Structures With Same Primary Citation

  • 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 electro ...

    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.

    Organizational Affiliation: 

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



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
NADPH--cytochrome P450 reductase 2
A, B
640Arabidopsis thalianaMutation(s): 0 
Gene Names: ATR2, AR2, At4g30210, F9N11.60
EC: 1.6.2.4
Find proteins for Q9SUM3 (Arabidopsis thaliana)
Go to UniProtKB:  Q9SUM3
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FAD
Query on FAD
Download CCD File 
A, B
FLAVIN-ADENINE DINUCLEOTIDE
C27 H33 N9 O15 P2
VWWQXMAJTJZDQX-UYBVJOGSSA-N		 Ligand Interaction
FMN
Query on FMN
Download CCD File 
A
FLAVIN MONONUCLEOTIDE
C17 H21 N4 O9 P
FVTCRASFADXXNN-SCRDCRAPSA-N		 Ligand Interaction
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 = 55.333α = 97.84
b = 61.821β = 100.51
c = 88.331γ = 90.27
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data collection
HKL-2000data scaling
PHASERphasing
PDB_EXTRACTdata extraction
HKL-2000data reduction

Structure Validation

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View more in-depth experimental data

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