Data/hora: 06/06/2024 14:20:56

Provedor de dados: | 80
País: | Brazil
Título: | Characterization of insecticidal peptides from venom Australian funnel-web spiders
Autores: | Vonorax,E. J.; Tyler,M. I.; Atkinson,R. K.; Howden,M. E. H.
Data: | 2006-04-01
Ano: | 2006
Palavras-chave: | Australian funnel-web spiders; Hadronyche and Atrax species; Venom; Insecticidal toxins; Peptides; Helicoverpa armigera.
Resumo: | Australian funnel-web spiders are relatively large primitive hunting spiders. Male Atrax robustus spiders have been responsible for a number of human deaths. Venom was collected from the species Hadronyche infensa (Hickman) [female], H. formidabilis [male and female], H. versuta [female], and A. robustus (Cambridge) [male] and was fractionated by high performance liquid chromatography. This resulted in the isolation and purification of a homologous series of 7 insecticidal peptides of relatively low molecular mass (approximately 4kDa). The amino acid sequences of these toxins consisted of 36 or 37 amino acids and were named atracotoxins. For the major bioassay of these toxins, we used the cotton bollworm, Helicoverpa armigera (Hubner), due to the great damage it causes to crops worldwide. These toxins, when injected subcutaneously into fifth or sixth instar larvae of Helicoverpa armigera,were lethal or caused an apparently irreversible writhing. The toxin from H. versuta venom showed no significant toxicity when subcutaneously injected into newborn mice. One of the toxins was found to have a free acid carboxyl terminus. These toxins have great potential as lead compounds for insecticide design or for incorporation in recombinant baculovirus insecticides.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992006000200005
Editor: | Centro de Estudos de Venenos e Animais Peçonhentos
Relação: | 10.1590/S1678-91992006000200005
Formato: | text/html
Fonte: | Journal of Venomous Animals and Toxins including Tropical Diseases  v.12 n.2 2006
Fonte: | info:eu-repo/semantics/openAccess