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. 2019 Feb 6;9:1506. doi: 10.1038/s41598-018-37815-w

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© The Author(s) 2019

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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Phylogenetic tree of SHMT classes from sequenced plant species. (A) All SHMT proteins identified in five model plants; C. reinhardtii (algae; green box), P. patens (moss), S. moellendorfii (lycophyte), O. sativa (monocot), and A. thaliana (eudicot), in addition to G. max (soybean; black box) and other monocots and eudicots cytosolic, nucleic, chloroplastic, and mitochondrial-localized SHMTs were included in the analysis. SHMTs (in red) from A. thaliana belong to mitochondrial SHMT1 (AT4g37930) and SHMT2 (AT5g26781), the chloroplastic SHMT3 (AT4g32520), the cytosolic SHMT4 (AT4g13930) and SHMT5 (AT4g13890), in addition to the nucleic members SHMT6 (AT1g22020) and SHMT7 (AT1G36370). Glyma: G. max; Vitvi: V. Vinifera; Carpa: C. papaya; Arath: A. thaliana; Medtr: M. truncatula; Poptr: P. trichocarpa; Sorbi: S. bicolor; Orysa: O. sativa; Selmo: S. moellendorfii; Phypa: P. patens; Chlre: C. reinhardtii. (B) One SHMT subunit with highlighted catalytic sites, PLP and THF cofactor binding and oligomeric structural residues labelled. Domain variation analysis of the GmSHMT classes showing that most of the domain variation was observed within the nucleic-targeted GmSHMT class, with 14 domain variation out of 40, affecting protein structure (dimerization and tetramerization), substrate binding (including THF and PLP binding), and catalysis. NI: Transcripts Non-Induced under SCN infection; IRL: Transcripts Induced in Resistant line only under SCN infection; IRSL: Transcripts Induced in Resistant and Susceptible lines under SCN infection.