Recombinant Dermatophagoides pteronyssinus Mite group 2 allergen Der p 2 (DERP2)

The N-terminal 6xHis tag was fused to the gene fragment corresponding to the 18-146aa of the Dermatophagoides pteronyssinus DERP2 protein and then was cloned into an expression vector. The expression vector was transfected into the yeast cells for expression. The generated product was purified and separated to obtain the recombinant Dermatophagoides pteronyssinus DERP2 protein. Its purity is higher than 90%. This recombinant Dermatophagoides pteronyssinus DERP2 protein showed an apparent molecular weight of about 16 kDa under SDS-PAGE condition.

DERP2 is a gene encoding a protein named Mite group 2 allergen Der p 2 and belongs NPC2 family. Allergic disease can be characterized as manifestations of an exaggerated inflammatory response to environmental allergens triggers. The house dust mite is a major source of environmental inhalation allergens involved in the pathogenesis of anaphylactic type reactions in humans and animals. Mite allergen Der-p2 (DERP2) is one of the major allergens of the house dust mite, which contributes to TLR4 expression and function in B cells in allergic patients. However, the precise mechanisms of Der-p2 on B cells remain obscure.