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. 2019 May 31;10:703. doi: 10.3389/fpls.2019.00703

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Copyright © 2019 Liu, Sun, Xue, Mao, Jia and Li.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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3D structure models of GhSAD protein monomers (C,D, upper panel I) and C18:0/C16:0-ACP chains as well as side chains of key amino acids close to catalytic center of diiron ions (lower panel II). All 3D models were predicted on Swiss-model (https://swissmodel.expasy.org/) with RcSAD1 (NP_001310659.1) and AtAAD3 as temples (A,B). Files of 3D structure of GhSADs were showed using Discovery Studio 4.1 software. Yellow bolls in upper panel I refer to diiron ions. Blue bolls/spheres refer to common amino acids as same as RcSAD1 while pink bolls refer to the varied amino acids. The fatty-acyl chains and side chains of amino acids were drawn by ChemDraw software (lower panel II). Black color represents C18:0-ACP and its common amino acids. Red indicates C16:0-ACP and varied amino acids.