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cDNA CLONING AND TRANSCRIPTIONAL REGULATION OF THE CECROPIN AND ATTACIN FROM THE ORIENTAL FRUIT FLY, Bactrocera dorsalis (DIPTERA: TEPHRITIDAE)
Author(s) -
Liao YinYin,
Zuo YuHan,
Tsai ChengLung,
Hsu ChiaMing,
Chen MeiEr
Publication year - 2015
Publication title -
archives of insect biochemistry and physiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.576
H-Index - 66
eISSN - 1520-6327
pISSN - 0739-4462
DOI - 10.1002/arch.21230
Subject(s) - bactrocera dorsalis , biology , complementary dna , tephritidae , cecropin , open reading frame , rapid amplification of cdna ends , molecular cloning , instar , microbiology and biotechnology , cloning (programming) , antimicrobial peptides , larva , botany , gene , pest analysis , genetics , peptide sequence , antimicrobial , computer science , programming language
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.