Dataset Information

RUG3 is a negative regulator of plant responses to ABA in Arabidopsis thaliana.

ABSTRACT: Mitochondria is a main target of various stressors. Dysfunction of mitochondria stimulates overproduction of reactive oxygen species (ROS), which can cause oxidative damage to mitochondria and DNA. Recently, we demonstrated that RCC1/UVR8/GEF-like 3 (RUG3), a member of the Regulator of Chromatin Condensation 1 (RCC1) protein family, can directly interact with ataxia telangiectasia mutated (ATM), a key regulator of the DNA damage response (DDR), and synergistically regulates the alternative splicing of mitochondrial nad2. Aberrant ROS accumulation and mitochondrial dysfunction result in root growth retardation and increased DDR. Here we reveal that RUG3 mutations increased plant responses to ABA during seed germination and post-germinative growth. Our findings identify RUG3 as a novel regulator of ABA signaling pathway in Arabidopsis thaliana.

SUBMITTER: Su C

PROVIDER: S-EPMC5566355 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature

ACCESS DATA

Publications

RUG3 is a negative regulator of plant responses to ABA in Arabidopsis thaliana.

Su Chao C Yuan Jinhong J Zhao Hongtao H Zhao Yankun Y Ji Hongtao H Wang Youning Y Li Xia X

Plant signaling & behavior 20170614 6

Mitochondria is a main target of various stressors. Dysfunction of mitochondria stimulates overproduction of reactive oxygen species (ROS), which can cause oxidative damage to mitochondria and DNA. Recently, we demonstrated that RCC1/UVR8/GEF-like 3 (RUG3), a member of the Regulator of Chromatin Condensation 1 (RCC1) protein family, can directly interact with ataxia telangiectasia mutated (ATM), a key regulator of the DNA damage response (DDR), and synergistically regulates the alternative splic ...[more]

PMID: 28613105

Similar Datasets

Project description:Reversible phosphorylation of proteins is a ubiquitous regulatory mechanism in vivo that can respond to external changes, and plays an extremely important role in cell signal transduction. Protein phosphatase 2C is the largest protein phosphatase family in higher plants. Recently, it has been found that some clade A members can negatively regulate ABA signaling pathways. However, the functions of several subgroups of Arabidopsis PP2C other than clade A have not been reported, and whether other members of the PP2C family also participate in the regulation of ABA signaling pathways remains to be studied. In this study, based on the previous screening and identification work of PP2C involved in the ABA pathway, the clade F member PIA1 encoding a gene of the PP2C family, which was down-regulated after ABA treatment during the screening, was selected as the target. Overexpression of PIA1 significantly down-regulated the expression of ABA marker gene RD29A in Arabidopsis protoplasts, and ABA-responsive elements have been found in the cis-regulatory elements of PIA1 by promoter analysis. When compared to Col-0, transgenic plants overexpressing PIA1 were less sensitive to ABA, whereas pia1 showed the opposite trait in seed germination, root growth, and stomatal opening experiments. Under drought stress, SOD, POD, CAT, and APX activities of PIA1 overexpression lines were lower than Col-0 and pia1, while the content of H2O2 was higher, leading to its lowest survival rate in test plants, which were consistent with the significant inhibition of the expression of ABA-dependent stress-responsive genes RD29B, ABI5, ABF3, and ABF4 in the PIA1 transgenic background after ABA treatment. Using yeast two-hybrid and luciferase complementation assays, PIA1 was found to interact with multiple ABA key signaling elements, including 2 RCARs and 6 SnRK2s. Our results indicate that PIA1 may reduce plant drought tolerance by functioning as a common negative regulator involved in ABA signaling pathway.

Dataset Information

RUG3 is a negative regulator of plant responses to ABA in Arabidopsis thaliana.

Publications

RUG3 is a negative regulator of plant responses to ABA in Arabidopsis thaliana.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets