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Open AccessArticle

Evolutionary Analysis of JAZ Proteins in Plants: An Approach in Search of the Ancestral Sequence

1
Laboratorio de Epigenética Vegetal, Facultad de Ciencias Forestales, Universidad de Concepción, Concepción 4070386, Chile
2
Institute of Biological Sciences, Campus Talca, Universidad de Talca, Talca 34655488, Chile
*
Author to whom correspondence should be addressed.
Int. J. Mol. Sci. 2019, 20(20), 5060; https://doi.org/10.3390/ijms20205060 (registering DOI)
Received: 13 September 2019 / Revised: 9 October 2019 / Accepted: 10 October 2019 / Published: 12 October 2019
(This article belongs to the Special Issue Jasmonic Acid Pathway in Plants)
Jasmonates are phytohormones that regulate development, metabolism and immunity. Signal transduction is critical to activate jasmonate responses, but the evolution of some key regulators such as jasmonate-ZIM domain (JAZ) repressors is not clear. Here, we identified 1065 JAZ sequence proteins in 66 lower and higher plants and analyzed their evolution by bioinformatics methods. We found that the TIFY and Jas domains are highly conserved along the evolutionary scale. Furthermore, the canonical degron sequence LPIAR(R/K) of the Jas domain is conserved in lower and higher plants. It is noteworthy that degron sequences showed a large number of alternatives from gymnosperms to dicots. In addition, ethylene-responsive element binding factor-associated amphiphilic repression (EAR) motifs are displayed in all plant lineages from liverworts to angiosperms. However, the cryptic MYC2-interacting domain (CMID) domain appeared in angiosperms for the first time. The phylogenetic analysis performed using the Maximum Likelihood method indicated that JAZ ortholog proteins are grouped according to their similarity and plant lineage. Moreover, ancestral JAZ sequences were constructed by PhyloBot software and showed specific changes in the TIFY and Jas domains during evolution from liverworts to dicots. Finally, we propose a model for the evolution of the ancestral sequences of the main eight JAZ protein subgroups. These findings contribute to the understanding of the JAZ family origin and expansion in land plants. View Full-Text
Keywords: Jasmonate-ZIM domain; JAZ repressors; Jas domain; TIFY; degron; phylogenetic analysis; ancestral sequences Jasmonate-ZIM domain; JAZ repressors; Jas domain; TIFY; degron; phylogenetic analysis; ancestral sequences
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Garrido-Bigotes, A.; Valenzuela-Riffo, F.; Figueroa, C.R. Evolutionary Analysis of JAZ Proteins in Plants: An Approach in Search of the Ancestral Sequence. Int. J. Mol. Sci. 2019, 20, 5060.

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