A gloverin-like antibacterial protein is synthesized in Helicoverpa armigera following bacterial challenge.
Dev Comp Immunol
; 22(4): 387-99, 1998.
Article
en En
| MEDLINE
| ID: mdl-9699484
ABSTRACT
A bacteria inducible antibacterial protein, P2, was isolated from the old world bollworm Helicoverpa armigera. Fifth-instar larvae were injected with live Escherichia coli NCTC 8196. P2 was isolated by HPLC using reversed-phase and size-exclusion columns. In addition, P2 was isolated by an alternative method of sequential cation-exchange and reversed-phase HPLC. The structure of P2 was determined by N-terminal Edman degradation and mass spectrometry. P2 had similar mass (14.1 kDa) structure and activity to gloverin, an inducible glycine-rich antibacterial protein isolated from Hyalophora gloveri [Axén, A.; Carlsson, A.; Engström, A.; Bennich, H. Eur. J. Biochem. 247614-619; 1997]. At the N-terminus P2 had approximately 60% identity with gloverin. P2 is basic, heat stable, and displayed rapid antibacterial action. P2 was active against the Gram-negative bacteria tested and was inactive against the Gram-positive bacteria, Candida albicans, a bovine turbinate cell line, and pestivirus.
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Banco de datos:
MEDLINE
Asunto principal:
Biosíntesis de Proteínas
/
Escherichia coli
/
Lepidópteros
/
Antiinfecciosos
Límite:
Animals
Idioma:
En
Año:
1998
Tipo del documento:
Article