4DNQ

Crystal Structure of DAD2 S96A mutant


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.242 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

DAD2 Is an alpha/beta Hydrolase likely to Be Involved in the Perception of the Plant Branching Hormone, Strigolactone

Hamiaux, C.Drummond, R.S.Janssen, B.J.Ledger, S.E.Cooney, J.M.Newcomb, R.D.Snowden, K.C.

(2012) Curr.Biol. 22: 2032-2036

  • DOI: 10.1016/j.cub.2012.08.007
  • Primary Citation of Related Structures:  4DNP

  • PubMed Abstract: 
  • Strigolactones are a recently discovered class of plant hormone involved in branching, leaf senescence, root development, and plant-microbe interactions. They are carotenoid-derived lactones, synthesized in the roots and transported acropetally to mo ...

    Strigolactones are a recently discovered class of plant hormone involved in branching, leaf senescence, root development, and plant-microbe interactions. They are carotenoid-derived lactones, synthesized in the roots and transported acropetally to modulate axillary bud outgrowth (i.e., branching). However, a receptor for strigolactones has not been identified. We have identified the DAD2 gene from petunia, an ortholog of the rice and Arabidopsis D14 genes, and present evidence for its roles in strigolactone perception and signaling. DAD2 acts in the strigolactone pathway, and the dad2 mutant is insensitive to the strigolactone analog GR24. The crystal structure of DAD2 reveals an α/β hydrolase fold containing a canonical catalytic triad with a large internal cavity capable of accommodating strigolactones. In the presence of GR24 DAD2 interacts with PhMAX2A, a central component of strigolactone signaling, in a GR24 concentration-dependent manner. DAD2 can hydrolyze GR24, with mutants of the catalytic triad abolishing both this activity and the ability of DAD2 to interact with PhMAX2A. The hydrolysis products can neither stimulate the protein-protein interaction nor modulate branching. These observations suggest that DAD2 acts to bind the mobile strigolactone signal and then interacts with PhMAX2A during catalysis to initiate an SCF-mediated signal transduction pathway.


    Organizational Affiliation

    Plant & Food Research, Private Bag 92169, Auckland 1142, New Zealand.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DAD2
A, B, C, D, E, F, G, H, I, J, K, L
269Petunia hybridaGene Names: DAD2
Find proteins for J9U5U9 (Petunia hybrida)
Go to UniProtKB:  J9U5U9
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.242 
  • Space Group: P 31
Unit Cell:
Length (Å)Angle (°)
a = 176.660α = 90.00
b = 176.660β = 90.00
c = 107.670γ = 120.00
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
Blu-Icedata collection
MOSFLMdata reduction
SCALAdata scaling
REFMACrefinement
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2012-02-08 
  • Released Date: 2012-11-14 
  • Deposition Author(s): Hamiaux, C.

Revision History 

  • Version 1.0: 2012-11-14
    Type: Initial release
  • Version 1.1: 2013-06-26
    Type: Database references