Expression of Aedes trypsin-modulating oostatic factor on the virion of TMV: A potential larvicide
Autor(es): Borovsky, Dov; Rabindran, Shailaja; Dawson, William O.; Powell, Charles A.; Iannotti, Donna A.; Morris, Timothy J.; Shabanowitz, Jeffry; Hunt, Donald F.; DeBondt, Hendrik L.; DeLoof, Arnold
Resumo: We report the engineering of the surface of the tobacco mosaic virus (TMV) virion with a mosquito decapepticle hormone, trypsinmodulating oostatic factor (TMOF). The TMV coat protein (CP) was fused to TMOF at the C terminus by using a read-through, leaky stop codon that facilitated expression of CP and chimeric CP-TMOF (20:1 ratio) that were coassembled into virus particles in infected Nicotiana tabacum. Plants that were infected with the hybrid TMV RNA accumulated TMOF to levels of 1.3% of total soluble protein. Infected tobacco leaf discs that were fed to Heliothis virescens fourth-instar larvae stunted their growth and inhibited trypsin and chymotrypsin activity in their midgut. Purified CP-TMOF virions fed to mosquito larvae stopped larval growth and caused death. Because TMV has a wide host range, expressing TMV-TMOF in plants can be used as a general method to protect them against agricultural insect pests and to control vector mosquitoes.
Palavras-Chave: Genetic Engineering; Helitothis Virescens; Mosquitoes; Plants; Digestion
Imprenta: Proceedings of the National Academy of Sciences of the United States of America, v. 103, n. 50, p. 18963-18968, 2006
Identificador do objeto digital: 10.1073/pnas.0606146103
Descritores: Aedes aegypti - Biochemistry ; Aedes aegypti - Larvicide ; Aedes aegypti - Public health
Data de publicação: 2006
