title: cDNA CLONING AND TRANSCRIPTIONAL REGULATION OF THE CECROPIN AND ATTACIN FROM THE ORIENTAL FRUIT FLY, Bactrocera dorsalis (DIPTERA: TEPHRITIDAE).
abstract: We described the cDNA cloning of two antimicrobial peptides (AMPs), cecropin (BdCec), and attacin C (BdAttC), from the oriental fruit fly, Bactrocera dorsalis (Hendel), a serious insect pest of fruit trees. Using rapid amplification of cDNA ends, fragments encompassing the entire open reading frames of BdCec and BdAttC were cloned and sequenced. The complete 425 bp cDNA of BdCec encodes a protein of 64 amino acids with a predicted molecular weight of 6.84 kDa. The 931 bp cDNA of BdAttC encodes a protein of 239 residues with a predicted molecular weight of 24.97 kDa. Real-time quantitative RT-PCR demonstrated that the developmental transcription profiles of BdCec and BdAttC were similar in each larvae, pupae, and adults. The constitutive expression levels of both AMPs were high in the first-instar and late third-instar larvae, suggesting that their antimicrobial activity is active in the newly hatched larvae and just before pupation. The basal expression levels were not significant different in adult fat bodies. The expression of BdCec and BdAttC was upregulated after bacterial challenge in adult fat bodies. The ratio of inducible expression to constitutive expression was lower in males compared to females.
authors.affiliation: Department of Entomology, National Chung Hsing University, Taichung, Taiwan.
authors.forename: Yin-Yin
authors.initials: YY
authors.lastname: Liao
authors.affiliation: Department of Entomology, National Chung Hsing University, Taichung, Taiwan.
authors.forename: Yu-Han
authors.initials: YH
authors.lastname: Zuo
authors.affiliation: Department of Entomology, National Chung Hsing University, Taichung, Taiwan.
authors.forename: Cheng-Lung
authors.initials: CL
authors.lastname: Tsai
authors.affiliation: Bachelor Program of Biotechnology, National Chung Hsing University, Taichung, Taiwan.
authors.forename: Chia-Ming
authors.initials: CM
authors.lastname: Hsu
authors.affiliation: Department of Entomology, National Chung Hsing University, Taichung, Taiwan.
authors.forename: Mei-Er
authors.initials: ME
authors.lastname: Chen
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D054807:Cecropins / Q000378:metabolism*; D005216:Fat Body / Q000378:metabolism; D005260:Female; D005786:Gene Expression Regulation; D019476:Insect Proteins / Q000378:metabolism*; D008297:Male; D008969:Molecular Sequence Data; D010802:Phylogeny; D017422:Sequence Analysis, DNA; D017386:Sequence Homology, Amino Acid; D033621:Tephritidae / Q000378:metabolism*
chemical_list: D054807:Cecropins; D019476:Insect Proteins; C039711:attacin antibacterial protein, insect
keywords: Bactrocera dorsalis; attacin; cecropin; fat body; immunity