title: ATDOF5.8 protein is the upstream regulator of ANAC069 and is responsive to abiotic stress.
abstract: ANAC069 encodes a plasma membrane-bound NAC protein that integrates auxin and salt signals to regulate Arabidopsis thaliana seed germination. However, the regulatory network of ANAC069 has not been revealed. Here, we report that ANAC069 is a direct target gene of the ATDOF5.8 transcription factor. There are seven DOF motifs in the promoter of ANAC069, which is highly enriched in the promoter. Yeast one-hybrid (Y1H) assays showed that a Dof protein, ATDOF5.8, binds to the DOF motifs. The interaction between ATDOF5.8 and the promoter of ANAC069 was further confirmed by transient expression assays in tobacco leaves. Chromatin Immunoprecipitation (ChIP) results suggested that the binding of ATDOF5.8 to DOF motifs in the promoter of ANAC069 occurs in vivo in Arabidopsis to regulate the expression of ANAC069. Moreover, ATDOF5.8 and ANAC069 share similar expression patterns in response to salt, drought and ABA treatment. Taken together, the results suggested a regulatory network model mediated by ANAC069, under abiotic stress conditions, ATDOF5.8 regulates the expression of ANAC069, and the activated ANAC069 binds to NAC recognition sequences or other motifs to regulate the expression of genes containing these motifs in their promoters.
authors.affiliation: State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, 26 Hexing Road, 150040 Harbin, China; Agricultural College of Heilongjiang Bayi Agricultural University, 163319 Daqing, China.
authors.forename: Lin
authors.initials: L
authors.lastname: He
authors.affiliation: State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, 26 Hexing Road, 150040 Harbin, China; Agricultural College of Heilongjiang Bayi Agricultural University, 163319 Daqing, China.
authors.forename: Chang
authors.initials: C
authors.lastname: Su
authors.affiliation: State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, 26 Hexing Road, 150040 Harbin, China; Agricultural College of Heilongjiang Bayi Agricultural University, 163319 Daqing, China. Electronic address: wangyucheng@ms.xjb.ac.cn.
authors.forename: Yucheng
authors.initials: Y
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, 26 Hexing Road, 150040 Harbin, China; Agricultural College of Heilongjiang Bayi Agricultural University, 163319 Daqing, China. Electronic address: zhigangwei1973@163.com.
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Wei
mesh_terms: D017360:Arabidopsis / Q000187:drug effects / Q000235:genetics* / Q000378:metabolism* / Q000502:physiology; D029681:Arabidopsis Proteins / Q000235:genetics* / Q000378:metabolism; D001483:Base Sequence; D002467:Cell Nucleus / Q000378:metabolism; D055864:Droughts; D018506:Gene Expression Regulation, Plant; D053263:Gene Regulatory Networks; D008565:Membrane Proteins / Q000378:metabolism*; D008969:Molecular Sequence Data; D059372:Nucleotide Motifs; D012492:Salts / Q000494:pharmacology; D013312:Stress, Physiological / Q000187:drug effects; D014157:Transcription Factors / Q000378:metabolism*
chemical_list: C000602371:ANAC069 protein, Arabidopsis; C000602370:ATDOF5.8 protein, Arabidopsis; D029681:Arabidopsis Proteins; D008565:Membrane Proteins; D012492:Salts; D014157:Transcription Factors
keywords: Abiotic stress; Arabidopsis; ChIP; DOF motif; NAC; Y1H