Abstract
SUV (the Suppressor of variegation [Su(var)] homologs and related) gene family is a subgroup of the SET gene family. According to the SRA domain and WIYLD domain distributions, it can be divided into two categories, namely SUVH (the Suppressor of variegation [Su(var)] homologs) and SUVR (the Suppressor of variegation [Su(var)] related). In this study, 139 SUV genes were identified in allopolyploid Brassica napus and its diploid ancestors, and their evolutionary relationships, protein properties, gene structures, motif distributions, transposable elements, cis-acting elements and gene expression patterns were analyzed. Our results showed that the SUV gene family of B. napus was amplified during allopolyploidization, in which the segmental duplication and TRD played critical roles. After the separation of Brassica and Arabidopsis lineages, orthologous gene analysis showed that many SUV genes were lost during the evolutionary process in B. rapa, B. oleracea and B. napus. The analysis of the gene and protein structures and expression patterns of 30 orthologous gene pairs which may have evolutionary relationships showed that most of them were conserved in gene structures and protein motifs, but only four gene pairs had the same expression patterns.
Highlights
52 genes contained abscisic acid response element (ABRE), 36 genes contained GT1-motif element (ARE), 52 genes contained abscisic acid response element (ABRE), 36 genes conelement, 26 genes contained drought response element (MBS), 23 genes contained defense tained GT1-motif element, 26 genes contained drought response element (MBS), 23 genes and stress response element (TC-rich repeats) and 21 genes contained low-temperature contained defense and stress response element (TC-rich repeats) and 21 genes contained response element (LTR). These results suggest that the Su(var)] homologs and related (SUV) genes in B. napus contain low-temperature response element (LTR)
We found that the SUV gene family in B. napus amplified during allopolyploidization, and the segmental duplication was more important than the tandem duplication for amplification
Compared with Arabidopsis, many SUV genes in B. napus and its diploid ancestors were lost during evolution
Summary
The suppressor of variegation [Su(var)] homologs and related (SUV) gene family is a general term for these genes coding SET (Suppressor of variegation collection, Enhancer of zeste, Trithorax) domain proteins. The SET domain (named by three proteins in Drosophila, namely Suppressor of variegation collection, Enhancer of zeste and Trithorax) has histone methyltransferase activity [2,3,4]. The 37 putative SET domain genes in Arabidopsis were divided into four categories: Enhancer of zeste [E(z)] homologs, Ash homologs and related, trixthorax(trx) homologs and related and Suppressor of variegation [Su(var)] homologs and related [5]. SUV gene family can be divided into SUVH (Suppressor of variegation [Su(var)] homologs) and SUVR (Suppressor of variegation [Su(var)] related) genes by the existence of SRA domain, and the former contains SRA domain, while the latter does not [8]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
