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Zhi-PingWu,Yan-Yan Liu,Guo-Qiang Chen,Ting-LiangWang,Jian-Zhong Tan 한국응용곤충학회 2014 Journal of Asia-Pacific Entomology Vol.17 No.1
The silkworm fat body is the site of many intermediary metabolic processes, and a source of sustenance forgrowth throughout the life cycle. Fat body proteins are responsible for storing nutrients, providing energy, andregulating hormones, and they have been identified using proteomic approaches. However, detailed differentialexpression of sex-related fat body proteins has not previously been evaluated. In the present study, we characterizedthe differential expression of sex-related fat body proteins, by using 2-dimensional gel electrophoresis(2-DE) followed bymass spectrometry identification and bioinformaticsmethods.We extracted the fat body proteinsfrom 5-day-old fifth instar larvae (L5), 10-day-old fifth instar larvae (corresponding to the end of spinning[LE]), and 0-day-old pupae (P0) of the multivoltine silkworm variety “Da Zao”. We confirmed the presence of 11important sex-specific expression proteins and 14 stage-specific expression proteins.We accurately identified 13of these specific expression proteins, including actin, calponin-like protein, 75 kDa subunit NADH, receptor foractivated protein kinase C from Bombyx mori (BmRACK), IMP (inosine monophosphate) cyclohydrolase, tropomyosin1, β-tubulin, hypothetical protein, antichymotrypsin precursor, and 30 K protein precursor.We showedthat BmRACK was differentially expressed betweenmale and female silkworms.Wediscuss the biological roles ofthe specific expression proteins during the larval–pupal developmental stages.