6AP6 image
Entry Detail
PDB ID:
6AP6
Keywords:
Title:
Crystal Structure of DAD2 in complex with tolfenamic acid
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2017-08-17
Release Date:
2018-03-21
Method Details:
Experimental Method:
Resolution:
1.65 Å
R-Value Free:
0.20
R-Value Work:
0.16
R-Value Observed:
0.16
Space Group:
P 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Probable strigolactone esterase DAD2
Mutations:C89Q
Chain IDs:A, B
Chain Length:269
Number of Molecules:2
Biological Source:Petunia hybrida
Ligand Molecules
Primary Citation
Inhibition of strigolactone receptors byN-phenylanthranilic acid derivatives: Structural and functional insights.
J. Biol. Chem. 293 6530 6543 (2018)
PMID: 29523686 DOI: 10.1074/jbc.RA117.001154

Abstact

The strigolactone (SL) family of plant hormones regulates a broad range of physiological processes affecting plant growth and development and also plays essential roles in controlling interactions with parasitic weeds and symbiotic fungi. Recent progress elucidating details of SL biosynthesis, signaling, and transport offers many opportunities for discovering new plant-growth regulators via chemical interference. Here, using high-throughput screening and downstream biochemical assays, we identified N-phenylanthranilic acid derivatives as potent inhibitors of the SL receptors from petunia (DAD2), rice (OsD14), and Arabidopsis (AtD14). Crystal structures of DAD2 and OsD14 in complex with inhibitors further provided detailed insights into the inhibition mechanism, and in silico modeling of 19 other plant strigolactone receptors suggested that these compounds are active across a large range of plant species. Altogether, these results provide chemical tools for investigating SL signaling and further define a framework for structure-based approaches to design and validate optimized inhibitors of SL receptors for specific plant targets.

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Primary Citation of related structures