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Insect Biochemistry and Molecular Biology

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  1. Overexpression of the cytochrome c oxidase subunit I gene associated with a pyrethroid resistant strain of German cockroaches, Blattella ger...

    Insect Biochemistry and Molecular Biology 33(10):1043 (2003) PMID 14505698

    I gene (COXI) was identified and isolated as a differentially expressed gene between insecticide susceptible ACY and resistant Apyr-R German cockroach strains using PCR-selected subtractive hybridization and cDNA array techniques. The cDNA sequence of COXI has an open reading frame of 1533 nucleotid...
  2. Prophenoloxidase-activating proteinase-3 (PAP-3) from Manduca sexta hemolymph: a clip-domain serine proteinase regulated by serpin-1J and se...

    Insect Biochemistry and Molecular Biology 33(10):1049 (2003) PMID 14505699

    We previously isolated PAP-1 from integument and PAP-2 from hemolymph of the tobacco hornworm, Manduca sexta. Here, we report the purification, characterization, and regulation of PAP-3 from the hemolymph. Similar to M. sexta PAP-2, PAP-3 consists of two amino-terminal clip domains followed by a car...
  3. Isolation, characterization and chemical synthesis of a new insect defensin from Chironomus plumosus (Diptera).

    Insect Biochemistry and Molecular Biology 28(12):1059 (1998) PMID 9887520

    We have isolated two 36-residue peptides from this hemolymph which are active against Gram-positive bacteria. The peptides are novel members of the insect defensin family and their sequences present marked differences with those of insect defensins isolated from other dipteran species. We have devel...
  4. A hydrophobic peptide (VAP-peptide) of the silkworm, Bombyx mori: structure, expression and an enhancing function of diapause hormone activi...

    Insect Biochemistry and Molecular Biology 28(2):75 (1998) PMID 9639873

    We have recently identified a unique lipophilic peptide (VAP-peptide) with diapause egg inducing activity in the silkworm, Bombyx mori (Imai et al., 1996). The cloning and sequencing of cDNA encoding VAP-peptide have demonstrated that the deduced amino acid sequence consisted of 84 amino acid residu...
  5. Protein purification and cDNA cloning of a cecropin-like peptide from the larvae of fall webworm (Hyphantria cunea).

    Insect Biochemistry and Molecular Biology 27(8-9):711 (1997) PMID 9443371

    We obtained three other cDNAs exhibiting high sequence similarity with Hyphantria cecropin A. We synthesized the C-terminally amidated peptide of 35 residues based on the deduced sequence of the isolated cDNA of Hyphantria cecropin A. The synthetic peptide exhibited strong antibacterial activity aga...
  6. Semi-quantitative analysis of changes in the plasma peptidome of Manduca sexta larvae and their correlation with the transcriptome variation...

    Insect Biochemistry and Molecular Biology 47:46 (2014) PMID 24565606

    We launched a pilot study to identify differences in the peptidome of cell-free hemolymph samples from larvae injected with buffer or a mixture of bacteria. At 24 h after injection, plasma was collected and treated with 50% acetonitrile to precipitate large proteins. The supernatants, containing pep...
  7. De novo biosynthesis of linoleic acid and its conversion to the hydrocarbon (Z,Z)-6,9-heptadecadiene in the astigmatid mite, Carpoglyphus la...

    Insect Biochemistry and Molecular Biology 45:51 (2014) PMID 24333472

    De novo biosynthesis of linoleic acid (LA) and its conversion to (Z,Z)-6,9-heptadecadiene were examined in Carpoglyphus lactis (Acarina, Carpoglyphidae). Experiments involving (13)C-administration using [1-(13)C]-d-glucose revealed that (13)C atoms were incorporated into LA of total lipid extracted...
  8. Genetic marking of sex using a W chromosome-linked transgene.

    Insect Biochemistry and Molecular Biology 43(12):1079 (2013) PMID 24036279

    We established 160 transgenic silkworm (Bombyx mori) lines to test the possibility of genetic sexing using a W chromosome-linked transgene, which is thought to be the best sexing strategy for lepidopteran species. One transgenic line with a female-specific expression pattern of reporter gene was obt...
  9. De novo characterization of transcriptome and gene expression dynamics in epidermis during the larval-pupal metamorphosis of common cutworm.

    Insect Biochemistry and Molecular Biology 43(9):794 (2013) PMID 23796435

    Larval cuticle is degraded and replaced by the pupal counterpart during larval-pupal metamorphosis in the holometabolous insects. In addition to the extrinsic transformation, the epidermis goes through significant changes at molecular levels. To elucidate the intrinsic mechanism of epidermal metamor...
  10. Identification of a critical region in the Drosophila ryanodine receptor that confers sensitivity to diamide insecticides.

    Insect Biochemistry and Molecular Biology 43(9):820 (2013) PMID 23806522

    Anthranilic diamides, which include the new commercial insecticide, chlorantraniliprole, are an exciting new class of chemistry that target insect ryanodine receptors. These receptors regulate release of stored intracellular calcium and play a critical role in muscle contraction. As with insects, ne...