Abstract
The parasitic wasp Nasonia vitripennis suppresses host immune mechanisms that include melanization reactions. Melanization is an important immune response of hosts induced by wasp infection and thus its inhibition represents a successful strategy for parasitism. However, the molecular basis associated with such inhibition is largely unknown in N. vitripennis. Here, we report recombinant expression, structural and functional characterization of a Nasonia-derived defensin-like peptide (called nasonin-3) whose recombinant product exerts inhibitory effect on host melanization. The possible role of nasonin-3 in immune suppression is also discussed.
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