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Spider venom contains a very valuable repertoire of natural resources to discover novel components for molecular diversity analyses and therapeutic applications. In this study, HWTX-XI toxins from the spider venom glands of Ornithoctonus huwena which are Kunitz-type toxins (KTTs) and were directly cloned, analyzed and functionally characterized. To date, the HWTX-XI superfamily consists of 38 members...
The spider Ornithoctonus huwena is a venomous spider found in southern China. Its venom is a complex mixture of numerous biologically active components. In this study, 41 novel unique transcripts encoding cellular proteins or other possible venom components were generated from the previously constructed cDNA library. These proteins were also annotated by KOG (eukaryotic orthologous group) and GO (gene...
By sequencing random clones from the venom gland cDNA library of the spider Ornithoctonus huwena, a transcript, named SHL-Ib1, encoding a lectin-like peptide was cloned. The amino acid sequence of the putative mature peptide of SHL-Ib1 is identical, except for seven different residues, with that of SHL-I, a lectin found in the venom of O. huwena. The mature peptides of SHL-Ib1b and SHL-Ib1c are the...
The bird spider Ornithoctonus huwena is one of the most venomous spiders in China. Its venom is a mixture of various compounds with diverse bioactivities. Ninety proteins and 47 peptides have been identified, and 67 cDNA sequences encoding different toxin precursors have been cloned. However, the genomic DNA of them is seldom reported. To characterize the genomic DNA structure of huwentoxins, the...
The bird spider Ornithoctonus huwena is one of the most venomous spiders in China. Its venom has been investigated but usually only the most abundant components have been analyzed. To characterize the primary structure of O. huwena toxins, a list of transcripts within the venom gland were made using the expressed sequence tag (EST) strategy. We generated 468 ESTs from a directional cDNA library of...
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