Crystal structure of Physcomitrella patens KAI2-like H

Experimental Data Snapshot

  • Resolution: 1.97 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.210 

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Structural Basis of Karrikin and Non-natural Strigolactone Perception in Physcomitrella patens.

Burger, M.Mashiguchi, K.Lee, H.J.Nakano, M.Takemoto, K.Seto, Y.Yamaguchi, S.Chory, J.

(2019) Cell Rep 26: 855-865.e5

  • DOI: https://doi.org/10.1016/j.celrep.2019.01.003
  • Primary Citation of Related Structures:  
    6ATX, 6AZB, 6AZC, 6AZD

  • PubMed Abstract: 

    In plants, strigolactones are perceived by the dual receptor-hydrolase DWARF14 (D14). D14 belongs to the superfamily of α/β hydrolases and is structurally similar to the karrikin receptor KARRIKIN INSENSITIVE 2 (KAI2). The moss Physcomitrella patens is an ideal model system for studying this receptor family, because it includes 11 highly related family members with unknown ligand specificity. We present the crystal structures of three Physcomitrella D14/KAI2-like proteins and describe a loop-based mechanism that leads to a permanent widening of the hydrophobic substrate gorge. We have identified protein clades that specifically perceive the karrikin KAR 1 and the non-natural strigolactone isomer (-)-5-deoxystrigol in a highly stereoselective manner.

  • Organizational Affiliation

    Plant Biology Laboratory, Salk Institute for Biological Studies, 10010 North Torrey Pines Road, La Jolla, CA 92037, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
PpKAI2-like H271Physcomitrium patensMutation(s): 0 
Gene Names: PHYPADRAFT_184560
EC: 3
Find proteins for A9SG07 (Physcomitrium patens)
Explore A9SG07 
Go to UniProtKB:  A9SG07
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA9SG07
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.97 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.210 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 49.41α = 90
b = 52.65β = 95.51
c = 52.3γ = 90
Software Package:
Software NamePurpose
XSCALEdata scaling
PDB_EXTRACTdata extraction
XDSdata reduction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2019-02-06
    Type: Initial release
  • Version 1.1: 2023-10-04
    Changes: Data collection, Database references, Refinement description