Evolution and functional diversification of R2R3-MYB transcription factors in plants.
Evolution and functional diversification of R2R3-MYB transcription factors in plants.
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DOI：
10.1093/hr/uhac058
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发表时间：
2022
影响因子：
8.7
通讯作者：
中科院分区：
文献类型：
--
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R2 R3-MYB基因（R2 R3-MYB）是植物界最大的转录因子基因家族之一，具有丰富的结构和功能多样性。然而，导致这种惊人的功能多样性的进化过程尚未明确建立。最近发展起来的基因组和经典分子技术提供了详细的了解植物R2 R3-MYBs的进化关系和功能。在这里，我们回顾了最近的基因组水平和功能的植物R2 R3-MYBs的分析，重点是它们的进化和功能的多样化。在陆地植物中，该基因家族通过全基因组复制和小规模复制而经历了大规模的扩展。沿着这一群体爆炸，出现了一系列功能保守或谱系特异性的亚家族/类群，它们在三个主要的植物特异性生物学过程中发挥作用：发育和细胞分化，专门的代谢，以及生物和非生物胁迫。植物R2 R3-MYB的快速扩增和功能多样化与被子植物日益复杂的结构高度一致。特别是，最近衍生的R2 R3-MYB与三个高度同源的内含子模式（a，B，和c）不成比例地与专门的代谢，并已成为陆地植物基因组中的主要亚科。植物R2 R3-MYBs的进化是一个活跃的研究领域，进一步的研究有望提高我们对该基因家族的进化和功能多样性的理解。
R2R3-MYB genes (R2R3-MYBs) form one of the largest transcription factor gene families in the plant kingdom, with substantial structural and functional diversity. However, the evolutionary processes leading to this amazing functional diversity have not yet been clearly established. Recently developed genomic and classical molecular technologies have provided detailed insights into the evolutionary relationships and functions of plant R2R3-MYBs. Here, we review recent genome-level and functional analyses of plant R2R3-MYBs, with an emphasis on their evolution and functional diversification. In land plants, this gene family underwent a large expansion by whole genome duplications and small-scale duplications. Along with this population explosion, a series of functionally conserved or lineage-specific subfamilies/groups arose with roles in three major plant-specific biological processes: development and cell differentiation, specialized metabolism, and biotic and abiotic stresses. The rapid expansion and functional diversification of plant R2R3-MYBs are highly consistent with the increasing complexity of angiosperms. In particular, recently derived R2R3-MYBs with three highly homologous intron patterns (a, b, and c) are disproportionately related to specialized metabolism and have become the predominant subfamilies in land plant genomes. The evolution of plant R2R3-MYBs is an active area of research, and further studies are expected to improve our understanding of the evolution and functional diversification of this gene family.
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