title: Identification of an E-box DNA binding protein, activated protein 4, and its function in regulating the expression of the gene encoding diapause hormone and pheromone biosynthesis-activating neuropeptide in Helicoverpa armigera.
abstract: Activated protein 4 (AP-4), an E-box DNA-binding protein, was cloned from the cotton bollworm, Helicoverpa armigera (Har). The expression of Har-AP-4 mRNA and the protein that it encodes are significantly higher in nondiapause pupae than in diapause pupae. In vitro-translated Har-AP-4 can bind specifically to the E-box motif on the promoter of the diapause hormone and pheromone biosynthesis-activating neuropeptide (DH-PBAN). Har-AP-4, fused with the green fluorescent protein (GFP), is localized to the nucleus, and overexpression of Har-AP-4 can significantly activate the promoter of the DH-PBAN gene that is involved in nondiapause pupal development in H. armigera. These results suggest that Har-AP-4, which binds to the promoter of DH-PBAN, may play a role in regulating pupal development in H. armigera.
authors.affiliation: State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-Sen (Zhongshan) University, Guangzhou, China.
authors.forename: C-H
authors.initials: CH
authors.lastname: Hu
authors.forename: B
authors.initials: B
authors.lastname: Hong
authors.forename: W-H
authors.initials: WH
authors.lastname: Xu
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D030801:Animals, Genetically Modified; D001483:Base Sequence; D003001:Cloning, Molecular; D004247:DNA / Q000235:genetics / Q000378:metabolism; D004268:DNA-Binding Proteins / Q000235:genetics / Q000378:metabolism*; D024721:E-Box Elements; D017344:Genes, Insect; D007301:Insect Hormones / Q000235:genetics*; D019476:Insect Proteins / Q000235:genetics / Q000378:metabolism*; D007915:Lepidoptera / Q000235:genetics* / Q000254:growth & development / Q000378:metabolism*; D008969:Molecular Sequence Data; D009479:Neuropeptides / Q000235:genetics*; D011401:Promoter Regions, Genetic; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D011994:Recombinant Proteins / Q000235:genetics / Q000378:metabolism; D017386:Sequence Homology, Amino Acid; D015533:Transcriptional Activation
chemical_list: D004268:DNA-Binding Proteins; D007301:Insect Hormones; D019476:Insect Proteins; D009479:Neuropeptides; D012333:RNA, Messenger; D011994:Recombinant Proteins; D004247:DNA; C075027:diapause hormone