ACONITASE 3 is part of theANAC017 transcription factor-dependent mitochondrial dysfunction response

编号 040030805

推送时间 20210913

研究领域 森林培育 

年份 2021 

类型 期刊 

语种 英语

标题 ACONITASE 3 is part of theANAC017 transcription factor-dependent mitochondrial dysfunction response

来源期刊 Plant Physiology

期 第308期

发表时间 20210512

关键词 ACONITASE 3;  theANAC017;  mitochondrial dysfunction;  ultraviolet B (UV-B);  mitochondria; 

摘要 Mitochondria are tightly embedded within metabolic and regulatory networks that optimize plant performance in response to environmental challenges. The best-known mitochondrial retrograde signaling pathway involves stress-induced activation of the transcription factor NAC DOMAIN CONTAINING PROTEIN 17 (ANAC017), which initiates protective responses to stress-induced mitochondrial dysfunction in Arabidopsis (Arabidopsis thaliana). Posttranslational control of the elicited responses, however, remains poorly understood. Previous studies linked protein phosphatase 2A subunit PP2A-B’γ, a key negative regulator of stress responses, with reversible phosphorylation of ACONITASE 3 (ACO3). Here we report on ACO3 and its phosphorylation at Ser91 as key components of stress regulation that are induced by mitochondrial dysfunction. Targeted mass spectrometry-based proteomics revealed that the abundance and phosphorylation of ACO3 increased under stress, which required signaling through ANAC017. Phosphomimetic mutation at ACO3-Ser91 and accumulation of ACO3S91D-YFP promoted the expression of genes related to mitochondrial dysfunction. Furthermore, ACO3 contributed to plant tolerance against ultraviolet B (UV-B) or antimycin A-induced mitochondrial dysfunction. These findings demonstrate that ACO3 is both a target and mediator of mitochondrial dysfunction signaling, and critical for achieving stress tolerance in Arabidopsis leaves.

服务人员 孙小满

服务院士 尹伟伦

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