Abstract
Inositol phosphate kinases (IPKs) play vital roles in the synthesis and regulation of cellular levels of inositol polyphosphates, which perform vital functions in eukaryotic cells as second messengers. Due to the vital biological roles of the inositol phosphates, the kinases involved in their synthesis have gained great attention. The IPK gene family has not been extensively studied in bread wheat (Triticum aestivum). In the present study, we reported a genome-wide identification, phylogenetic analysis and expression patterns of the IPK gene family in wheat. Gene structure, genome distribution, motif conservation, and gene ontology enrichment analysis were carried out systematically. A total of 24 inositol phosphate kinase (IPK) genes were identified in the wheat genome that belonged to 8 homoeologous groups. The TaIPK genes were distributed on chromosomes 1, 2, 3, 4, 5 and 7 in all the three sub-genomes A, B, and D. Based on phylogenetic analysis, these genes were classified into four subfamilies. The subfamilies were defined based on conserved domains, motifs, chromosome locations, and gene structures. Eight pairs of paralogous IPKs were identified based on the phylogenetic relationships among wheat IPKs. Gene ontology enrichment analysis revealed the significant role of IPK genes in different biological and molecular processes in addition to their role in inositol phosphate signaling. At different developmental stages, all the 24 TaIPKs exhibited diverse expression patterns in different tissues showing diversity in their biological functions. The current study identified and explored the properties of 24 IPK genes in the wheat genome at diverse levels, thus providing a strong foundation for researchers to understand the family of these kinases in wheat.
Published Version
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