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Expression of hornet genes encoding venom allergen antigen 5 in insects

Expression of hornet genes encoding venom allergen antigen 5 in insects Antigen 5, also known as Dol m V, is a major allergen found in the venom of the baldfaced hornet, Dolichovespula maculata. We have inserted the f10 and f17 cDNAs, which encode hornet antigen 5 (HA5) forms 2 (Dol m; VB) and 3 (Dol m VA), respectively, into the genome of the baculovirus, AcMNPV, to produce the recombinant baculovirus gene expression vectors, vEV‐HA5f10 and vEV‐HA5f17. Insect cells infected with either vEV‐HA5f10 or vEV‐HA5f17 produce and secrete a novel protein with an electrophoretic mobility which is similar if not identical to authentic mature Dol m V. The gene products also react specifically with a polyclonal antiserum raised to Dol m VB as expected. Dol m V gene products were not acutely toxic when injected into insect larvae. However, infection of fifth instar larvae with vEV‐HA5f17 resulted in premature melanization of the larvae and lower weight gain than infection with control virus. Thus, the Dol m V gene product has a subtle, possibly cytotoxic or biochemical effect on insects. The expression systems may prove useful in further structural and functional characterization of these proteins. © 1993 Wiley‐Liss, Inc. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Archives of Insect Biochemistry and Physiology Wiley

Expression of hornet genes encoding venom allergen antigen 5 in insects

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References (16)

Publisher
Wiley
Copyright
Copyright © 1993 Wiley‐Liss, Inc.
ISSN
0739-4462
eISSN
1520-6327
DOI
10.1002/arch.940220302
pmid
8467098
Publisher site
See Article on Publisher Site

Abstract

Antigen 5, also known as Dol m V, is a major allergen found in the venom of the baldfaced hornet, Dolichovespula maculata. We have inserted the f10 and f17 cDNAs, which encode hornet antigen 5 (HA5) forms 2 (Dol m; VB) and 3 (Dol m VA), respectively, into the genome of the baculovirus, AcMNPV, to produce the recombinant baculovirus gene expression vectors, vEV‐HA5f10 and vEV‐HA5f17. Insect cells infected with either vEV‐HA5f10 or vEV‐HA5f17 produce and secrete a novel protein with an electrophoretic mobility which is similar if not identical to authentic mature Dol m V. The gene products also react specifically with a polyclonal antiserum raised to Dol m VB as expected. Dol m V gene products were not acutely toxic when injected into insect larvae. However, infection of fifth instar larvae with vEV‐HA5f17 resulted in premature melanization of the larvae and lower weight gain than infection with control virus. Thus, the Dol m V gene product has a subtle, possibly cytotoxic or biochemical effect on insects. The expression systems may prove useful in further structural and functional characterization of these proteins. © 1993 Wiley‐Liss, Inc.

Journal

Archives of Insect Biochemistry and PhysiologyWiley

Published: Jan 1, 1993

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