Acetylome reprograming participates in the establishment of fruit metabolism during polyploidization in citrus

作者：Miao Zhang, Feng‐Quan Tan, Yan‐Jie Fan, Tingting Wang, Xin Song, Kai‐Dong Xie, Xiao‐Meng Wu, Fan Zhang, Xiuxin Deng, Jude W. Grosser, Wen‐Wu Guo · 发表于：PLANT PHYSIOLOGY · 年份：2022 · DOI：10.1093/plphys/kiac442 · 被引用次数：28 · 研究领域：Plant Molecular Biology Research、Plant Gene Expression Analysis、Plant nutrient uptake and metabolism

Polyploidization leads to novel phenotypes and is a major force in evolution. However, the relationship between the evolution of new traits and variations in the post-translational modifications (PTM) of proteins during polyploidization has not been studied. Acetylation of lysine residues is a common protein PTM that plays a critical regulatory role in central metabolism. To test whether changes in metabolism in citrus fruit is associated with the reprogramming of lysine acetylation (Kac) in non-histone proteins during allotetraploidization, we performed a global acetylome analysis of fruits from a synthetic allotetraploid citrus and its diploid parents. A total of 4,175 Kac sites were identified on 1,640 proteins involved in a wide range of fruit traits. In the allotetraploid, parental dominance (i.e. resemblance to one of the two parents) in specific fruit traits, such as fruit acidity and flavonol metabolism, was highly associated with parental Kac level dominance in pertinent enzymes. This association is due to Kac-mediated regulation of enzyme activity. Moreover, protein Kac probably contributes to the discordance between the transcriptomic and proteomic variations during allotetraploidization. The acetylome reprogramming can be partially explained by the expression pattern of several lysine deacetylases (KDACs). Overexpression of silent information regulator 2 (CgSRT2) and histone deacetylase 8 (CgHDA8) diverted metabolic flux from primary metabolism to secondary metabo...