Comparative Studies of Potential Binding Pocket Residues Reveal the Molecular Basis of ShHTL Receptors in the Perception of GR24 in
| Autor: | Junliang Liu, Xu Zhang, Hang Zhang, Pang Zhili, Jing Wang, Fulei Ma, Zhen Xi, Xin Wen |
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| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Striga hermonthica Mutant Amino Acid Motifs Strigolactone Plant Weeds Striga 01 natural sciences Lactones Surface plasmon resonance Receptor Plant Proteins Binding Sites biology Chemistry 010401 analytical chemistry General Chemistry biology.organism_classification 0104 chemical sciences Karrikin Dissociation constant Kinetics Biophysics General Agricultural and Biological Sciences Heterocyclic Compounds 3-Ring 010606 plant biology & botany |
| Zdroj: | Journal of agricultural and food chemistry. 68(45) |
| ISSN: | 1520-5118 |
| Popis: | Root parasitic weeds such as Striga spp. have caused significant losses in agriculture production worldwide. The seed germination of the weeds depends on strigolactones (SLs) that target a series of HYPOSENSITIVE TO LIGHT/KARRIKIN INSENSITIVE2 in Striga hermonthica (ShHTL) proteins. In the present study, 60 ShHTL7 mutants were constructed, and the equilibrium dissociation constants for GR24 (a synthetic SL analogue, commonly used as a standard in SL germination studies) against these mutants were measured by surface plasmon resonance. Based on these data, the SL binding pocket residues were distinguished. Of them, some specific residues for ShHTL7 were found, such as T142, T190, and M219. A model showing quite well internal and external predictive abilities was established by the mutation-dependent biomacromolecular quantitative structure-activity relationship method. It provided an expanded understanding for GR24 binding to a series of ShHTL receptors and should help design broad-spectrum agrochemicals with cross interactions with several members of SL receptors. |
| Databáze: | OpenAIRE |
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