Journal
TOXINS
Volume 15, Issue 5, Pages -Publisher
MDPI
DOI: 10.3390/toxins15050311
Keywords
dipeptidyl peptidase IV; venom; parasitoid; transcriptome; gene expression
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In this study, the molecular characteristics and possible functions of SgVnDPPIV, a proline-specific serine peptidase found in the venom of Scleroderma guani, were investigated. The gene encoding SgVnDPPIV was cloned and the recombinant protein showed high enzymatic activity. Functional analysis revealed the effects of SgVnDPPIV on detoxification, lipid synthesis and metabolism, response to stimuli, and ion exchange in the envenomated host.
Dipeptidyl peptidase IV (DPPIV) is a proline-specific serine peptidase that remains poorly investigated in terms of venom composition. Here, we describe the molecular characteristics and possible functions of DPPIV as a major venom component of the ant-like bethylid ectoparasitoid, Scleroderma guani, named SgVnDPPIV. The SgVnDPPIV gene was cloned, which encodes a protein with the conserved catalytic triads and substrate binding sites of mammalian DPPIV. This venom gene is highly expressed in the venom apparatus. Recombinant SgVnDPPIV, produced in Sf9 cells using the baculovirus expression system, has high enzymatic activity, which can be efficiently inhibited by vildagliptin and sitagliptin. Functional analysis revealed that SgVnDPPIV affects genes related to detoxification, lipid synthesis and metabolism, response to stimuli, and ion exchange in pupae of Tenebrio molitor, an envenomated host of S. guani. The present work contributes towards understanding the role of venom DPPIV involved in the interaction between parasitoid wasp and its host.
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