5CBK

Crystal structure of the strigolactone receptor ShHTL5 from Striga hermonthica


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.46 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.171 

Starting Model: experimental
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This is version 1.1 of the entry. See complete history


Literature

Structure-function analysis identifies highly sensitive strigolactone receptors in Striga.

Toh, S.Holbrook-Smith, D.Stogios, P.J.Onopriyenko, O.Lumba, S.Tsuchiya, Y.Savchenko, A.McCourt, P.

(2015) Science 350: 203-207

  • DOI: https://doi.org/10.1126/science.aac9476
  • Primary Citation of Related Structures:  
    5CBK

  • PubMed Abstract: 

    Strigolactones are naturally occurring signaling molecules that affect plant development, fungi-plant interactions, and parasitic plant infestations. We characterized the function of 11 strigolactone receptors from the parasitic plant Striga hermonthica using chemical and structural biology. We found a clade of polyspecific receptors, including one that is sensitive to picomolar concentrations of strigolactone. A crystal structure of a highly sensitive strigolactone receptor from Striga revealed a larger binding pocket than that of the Arabidopsis receptor, which could explain the increased range of strigolactone sensitivity. Thus, the sensitivity of Striga to strigolactones from host plants is driven by receptor sensitivity. By expressing strigolactone receptors in Arabidopsis, we developed a bioassay that can be used to identify chemicals and crops with altered strigolactone levels.


  • Organizational Affiliation

    Cell and Systems Biology, University of Toronto, 25 Willcocks Street, Toronto M5S 3B2, Canada.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ShHTL5271Striga hermonthicaMutation(s): 0 
Gene Names: ShHTL5
UniProt
Find proteins for A0A0M5I297 (Striga hermonthica)
Explore A0A0M5I297 
Go to UniProtKB:  A0A0M5I297
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A0M5I297
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.46 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.171 
  • Space Group: P 65 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 102.282α = 90
b = 102.282β = 90
c = 101.734γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-3000data reduction
HKL-3000data scaling
PHASERphasing
Cootmodel building

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-10-21
    Type: Initial release
  • Version 1.1: 2023-09-27
    Changes: Data collection, Database references, Derived calculations, Refinement description