Zhu K, Chen F, Liu J, Chen X, Hewezi T, Cheng ZM.
Sci Rep. 2016 Jun 17;6:28225. doi: 10.1038/srep28225.
Abstract
Calcium ion is an intracellular messenger that plays a central role in signal transduction pathways. Calcineurin B-like proteins (CBLs) and CBL-interacting protein kinases (CIPKs) signal network have shown different functions in the Ca(2+) signaling process. In this work, we identified the entire soybean (Glycine max) CIPK gene family, which comprised 52 genes and divided into four subgroups (I to IV) based on phylogeny. The gene structural analysis separated these 52 genes into an intron-rich clade and an intron-poor clade. Chromosomal location analysis resulted in the identification of 22 duplicated blocks and six tandem duplication events. Phylogenetic classification of 193 CIPK proteins from representative plant species suggested that the intron-poor clade of CIPKs originated in seed plants. Analysis of global gene expression patterns of soybean CIPK family revealed that most intron-poor soybean CIPK genes are drought-inducible; a finding that was further confirmed using qRT-PCR. Our study provides a foundation for further functional analysis to reveal the roles that CIPKs and more specifically the intron-poor clade play in drought tolerance in soybean.
See: http://www.nature.com/articles/srep28225
Figure 3: The 52 soybean CIPK genes were mapped to 19 chromosomes. The duplicated CIPK gene pairs in the segmental duplicated blocks are underlined and connected by lines.
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