Controlling the Heterodimerisation of the Phytosulfokine Receptor 1 (PSKR1) via Island Loop Modulation

Phytosulfokine (PSK) is a phytohormone responsible for cell-to-cell communication in plants, playing a pivotal role in plant development and growth. The binding of PSK to its cognate receptor, PSKR1, is modulated by the formation of a binding site located between a leucine-rich repeat (LRR) domain o...

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Autores principales: de Souza, João V., Kondal, Matthew, Zaborniak, Piotr, Cairns, Ryland, Bronowska, Agnieszka K.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7918699/
https://www.ncbi.nlm.nih.gov/pubmed/33670396
http://dx.doi.org/10.3390/ijms22041806
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author de Souza, João V.
Kondal, Matthew
Zaborniak, Piotr
Cairns, Ryland
Bronowska, Agnieszka K.
author_facet de Souza, João V.
Kondal, Matthew
Zaborniak, Piotr
Cairns, Ryland
Bronowska, Agnieszka K.
author_sort de Souza, João V.
collection PubMed
description Phytosulfokine (PSK) is a phytohormone responsible for cell-to-cell communication in plants, playing a pivotal role in plant development and growth. The binding of PSK to its cognate receptor, PSKR1, is modulated by the formation of a binding site located between a leucine-rich repeat (LRR) domain of PSKR1 and the loop located in the receptor’s island domain (ID). The atomic resolution structure of the extracellular PSKR1 bound to PSK has been reported, however, the intrinsic dynamics of PSK binding and the architecture of the PSKR1 binding site remain to be understood. In this work, we used atomistic molecular dynamics (MD) simulations and free energy calculations to elucidate how the PSKR1 island domain (ID) loop forms and binds PSK. Moreover, we report a novel “druggable” binding site which could be exploited for the targeted modulation of the PSKR1-PSK binding by small molecules. We expect that our results will open new ways to modulate the PSK signalling cascade via small molecules, which can result in new crop control and agricultural applications.
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spelling pubmed-79186992021-03-02 Controlling the Heterodimerisation of the Phytosulfokine Receptor 1 (PSKR1) via Island Loop Modulation de Souza, João V. Kondal, Matthew Zaborniak, Piotr Cairns, Ryland Bronowska, Agnieszka K. Int J Mol Sci Article Phytosulfokine (PSK) is a phytohormone responsible for cell-to-cell communication in plants, playing a pivotal role in plant development and growth. The binding of PSK to its cognate receptor, PSKR1, is modulated by the formation of a binding site located between a leucine-rich repeat (LRR) domain of PSKR1 and the loop located in the receptor’s island domain (ID). The atomic resolution structure of the extracellular PSKR1 bound to PSK has been reported, however, the intrinsic dynamics of PSK binding and the architecture of the PSKR1 binding site remain to be understood. In this work, we used atomistic molecular dynamics (MD) simulations and free energy calculations to elucidate how the PSKR1 island domain (ID) loop forms and binds PSK. Moreover, we report a novel “druggable” binding site which could be exploited for the targeted modulation of the PSKR1-PSK binding by small molecules. We expect that our results will open new ways to modulate the PSK signalling cascade via small molecules, which can result in new crop control and agricultural applications. MDPI 2021-02-11 /pmc/articles/PMC7918699/ /pubmed/33670396 http://dx.doi.org/10.3390/ijms22041806 Text en © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
de Souza, João V.
Kondal, Matthew
Zaborniak, Piotr
Cairns, Ryland
Bronowska, Agnieszka K.
Controlling the Heterodimerisation of the Phytosulfokine Receptor 1 (PSKR1) via Island Loop Modulation
title Controlling the Heterodimerisation of the Phytosulfokine Receptor 1 (PSKR1) via Island Loop Modulation
title_full Controlling the Heterodimerisation of the Phytosulfokine Receptor 1 (PSKR1) via Island Loop Modulation
title_fullStr Controlling the Heterodimerisation of the Phytosulfokine Receptor 1 (PSKR1) via Island Loop Modulation
title_full_unstemmed Controlling the Heterodimerisation of the Phytosulfokine Receptor 1 (PSKR1) via Island Loop Modulation
title_short Controlling the Heterodimerisation of the Phytosulfokine Receptor 1 (PSKR1) via Island Loop Modulation
title_sort controlling the heterodimerisation of the phytosulfokine receptor 1 (pskr1) via island loop modulation
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7918699/
https://www.ncbi.nlm.nih.gov/pubmed/33670396
http://dx.doi.org/10.3390/ijms22041806
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