3e85 Citations

Cytokinin-induced structural adaptability of a Lupinus luteus PR-10 protein.

Abstract

Plant pathogenesis-related (PR) proteins of class 10 are the only group among the 17 PR protein families that are intracellular and cytosolic. Sequence conservation and the wide distribution of PR-10 proteins throughout the plant kingdom are an indication of an indispensable function in plants, but their true biological role remains obscure. Crystal and solution structures for several homologues have shown a similar overall fold with a vast internal cavity which, together with structural similarities to the steroidogenic acute regulatory protein-related lipid transfer domain and cytokinin-specific binding proteins, strongly indicate a ligand-binding role for the PR-10 proteins. This article describes the structure of a complex between a classic PR-10 protein [Lupinus luteus (yellow lupine) PR-10 protein of subclass 2, LlPR-10.2B] and N,N'-diphenylurea, a synthetic cytokinin. Synthetic cytokinins have been shown in various bioassays to exhibit activity similar to that of natural cytokinins. The present 1.95 A resolution crystallographic model reveals four N,N'-diphenylurea molecules in the hydrophobic cavity of the protein and a degree of conformational changes accompanying ligand binding. The structural adaptability of LlPR-10.2B and its ability to bind different cytokinins suggest that this protein, and perhaps other PR-10 proteins as well, can act as a reservoir of cytokinin molecules in the aqueous environment of a plant cell.

Articles - 3e85 mentioned but not cited (5)

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Reviews citing this publication (4)

  1. Structural and functional aspects of PR-10 proteins. Fernandes H, Michalska K, Sikorski M, Jaskolski M. FEBS J 280 1169-1199 (2013)
  2. Pathogenesis related-10 proteins are small, structurally similar but with diverse role in stress signaling. Agarwal P, Agarwal PK. Mol Biol Rep 41 599-611 (2014)
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  4. Role of Small Molecule Ligands in IgE-Mediated Allergy. Khatri K, O'Malley A, Linn C, Kowal K, Chruszcz M. Curr Allergy Asthma Rep (2023)

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  13. Specific binding of gibberellic acid by cytokinin-specific binding proteins: a new aspect of plant hormone-binding proteins with the PR-10 fold. Ruszkowski M, Sliwiak J, Ciesielska A, Barciszewski J, Sikorski M, Jaskolski M. Acta Crystallogr D Biol Crystallogr 70 2032-2041 (2014)
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  15. Site-directed mutagenesis of histidine 69 and glutamic acid 148 alters the ribonuclease activity of pea ABR17 (PR10.4). Krishnaswamy S, Baral PK, James MN, Kav NN. Plant Physiol Biochem 49 958-962 (2011)
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  17. Evaluation of the allergenicity potential of TcPR-10 protein from Theobroma cacao. Menezes SP, dos Santos JL, Cardoso TH, Pirovani CP, Micheli F, Noronha FS, Alves AC, Faria AM, Gesteira Ada S. PLoS One 7 e37969 (2012)
  18. Improved Shoot Regeneration, Salinity Tolerance and Reduced Fungal Susceptibility in Transgenic Tobacco Constitutively Expressing PR-10a Gene. Agarwal P, Dabi M, More P, Patel K, Jana K, Agarwal PK. Front Plant Sci 7 217 (2016)
  19. Purification and Characterization of Pathogenesis Related Class 10 Panallergens. McBride JK, Cheng H, Maleki SJ, Hurlburt BK. Foods 8 E609 (2019)
  20. The Y-segment of novel cold dehydrin genes is conserved and codons in the PR-10 genes are under positive selection in Oxytropis (Fabaceae) from contrasting climates. Archambault A, Strömvik MV. Mol Genet Genomics 287 123-142 (2012)
  21. High temperatures promote the uptake of hydrophobic pollutants by Cucurbita pepo via altered gene expression levels of major latex-like proteins. Inui H, Katte N, Goto J, Iwabuchi A. J Pestic Sci 45 75-80 (2020)
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