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. 2020 Mar 2;10:3797. doi: 10.1038/s41598-020-60733-9

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Representative homology model structures of PB1 domain from one member from each family in Arabidopsis. The identifiers are: ARF5 (PDB: 4CHK), IAA17 (PDB: 2MUK), At2G36500 (CBS), At1G04700 (Kinase), At2G01190 (Kinase-derived), NBR1, NLP9 and Phox2. (A) Secondary structures shown in various colours: α-helices in ‘Cyan’; β-sheets in ‘red’ and turns in ‘purple’. Surface representation of the positive and negative faces shown in (B,C) respectively. Hydrophobic amino acids ‘AGVILFMP’ are in ‘Yellow’; Polar residues ‘NQTSCYW’ are in ‘Grey’; Positively charged ‘RKH’ are in ‘Blue’ and Negatively charged ‘DE’ are in ‘Red’.