6ATX image
Entry Detail
PDB ID:
6ATX
Keywords:
Title:
Crystal structure of Physcomitrella patens KAI2-like C
Biological Source:
PDB Version:
Deposition Date:
2017-08-29
Release Date:
2019-02-06
Method Details:
Experimental Method:
Resolution:
2.74 Å
R-Value Free:
0.21
R-Value Work:
0.17
R-Value Observed:
0.17
Space Group:
P 43
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:PpKAI2-like C
Chain IDs:A
Chain Length:276
Number of Molecules:1
Biological Source:Physcomitrella patens subsp. patens
Primary Citation
Structural Basis of Karrikin and Non-natural Strigolactone Perception in Physcomitrella patens.
Cell Rep 26 855 865.e5 (2019)
PMID: 30673608 DOI: 10.1016/j.celrep.2019.01.003

Abstact

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 KAR1 and the non-natural strigolactone isomer (-)-5-deoxystrigol in a highly stereoselective manner.

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