Journal
ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY
Volume 53, Issue 2, Pages 92-100Publisher
WILEY-LISS
DOI: 10.1002/arch.10088
Keywords
Cotesia rubecula; venom; prophenoloxidase; protease inhibitor
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Insects are important vectors of diseases with remarkable immune defense capabilities. Hymenopteran endoparasitoids are adapted to overcome the host defense system and, therefore, are useful sources of immune-suppressing proteins. Not much is known about venom proteins in endoparasitoids, especially those that have a functional relationship with polydnaviruses (PDVs). Here, we describe the isolation and characterization of a small venom protein (Vn4.6) from an endoparositoid, Cotesia rubecula, which interferes with the activation of the host hemolymph prophenoloxidose. The coding region for Vn4.6 is located upstream in the opposite direction of a gene coding for a C rubecula PDV-protein (Crp32). Arch. Insect Biochem. Physiol. 53:92-100, 2003. (C) 2003 Wiley-Liss, Inc.
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