• Title/Summary/Keyword: Silkmoth

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Molecular Cloning and Expression of a Novel Cuticle Protein Gene from the Chinese Oak Silkmoth, Antheraea pernyi

  • Kim Bo Yeon;Park Nam Sook;Jin Byung Rae;Kang Pil Don;Lee Bong Hee;Seong Su Il;Hwang Jae Sam;Chang Jong Su;Lee Sang Mong
    • International Journal of Industrial Entomology and Biomaterials
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    • v.10 no.1
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    • pp.11-17
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    • 2005
  • In our research to identify gene involved in the cuticle protein, we cloned a novel cuticle protein gene, ApCP15.5, from the Chinese oak silkmoth, Antheraea pernyi, larvae cDNA library. The gene encodes a 149 amino acid polypeptide with a predicted molecular mass of 15.5 kDa and a pI of 9.54. The ApCP15.5 contained a type-specific consensus sequence identifiable in other insect cuticle proteins and the deduced amino acid sequence of the ApCP15.5 cDNA is most homologous to Tenebrio molitor-C1B ($43\%$ protein sequence identity), followed by Locusta migratoria-76 ($42\%$ protein sequence identity). Northern blot and Western blot analyses revealed that the ApCP15.5 showed the epidermis-specific expression. The expression profile of ApCP15.5 indicated that the ApCP15.5 mRNA expression was detected in the early stages after larval ecdysis and larval-pupal metamorphosis, and its expression level was most significant on the first day of larval ecdysis and pupal stage. The ApCP15.5 was expressed as a 15.5 kDa polypeptide in baculovirus-infected insect cells.