A DNA sequence encoding Der p1 protein having a particular base sequence is codon-optimized for the Pichia pastoris expression system, which is conducive to expressing Der p1 in Pichia pastoris. After gene optimization and adding an activating element to increase the expression of Der p1 in molecular level, it was found that Der p1 is expressed at a higher level as compared with the prior art and has biological activity similar to the natural protein.

[Problem] To provide a nucleic acid expected to be useful for treating mite allergy. [Means to be solved] Provided is a nucleic acid comprising a nucleotide sequence encoding a chimeric protein, wherein the nucleic acid comprises a nucleotide sequence encoding a signal peptide, a nucleotide sequence encoding an intra-organelle stabilizing domain of LAMP, a nucleotide sequence encoding an allergen domain comprising Der p 1, Der p 2, Der p 23, and Der p 7, a nucleotide sequence encoding a transmembrane domain and a nucleotide sequence encoding an endosomal/lysosomal targeting domain of LAMP in this order.

[Problem] To provide a nucleic acid expected to be useful for treating mite allergy.

[Means to be solved] Provided is a nucleic acid comprising a nucleotide sequence encoding a chimeric protein, wherein the nucleic acid comprises a nucleotide sequence encoding a signal peptide, a nucleotide sequence encoding an intra-organelle stabilizing domain of LAMP, a nucleotide sequence encoding an allergen domain comprising Der p 1, Der p 2, Der p 23, and Der p 7, a nucleotide sequence encoding a transmembrane domain and a nucleotide sequence encoding an endosomal/lysosomal targeting domain of LAMP in this order.

The present invention provides to novel prophylactic and therapeutic formulations being effective in the prevention and/or the reduction of allergenic responses to specific allergens. In particular the invention provides compositions comprising deglycosylated allergens which allergens are normally glycosylated in their natural environment. Further this invention further relates to hypoallergenic recombinant deglycosylated derivatives of the major protein allergen from Dermatophagoides pteronyssinus, allergen proDerp1. Even more particularly the invention further provides hypoallergenic recombinant deglycosylated derivatives of proDerp1 of which catalytic cysteine 132 is mutated.

[Problem] To provide a nucleic acid expected to be useful for treating mite allergy.

[Means to be solved] Provided is a nucleic acid comprising a nucleotide sequence encoding a chimeric protein, wherein the nucleic acid comprises a nucleotide sequence encoding a signal peptide, a nucleotide sequence encoding an intra-organelle stabilizing domain of LAMP, a nucleotide sequence encoding an allergen domain comprising Der p 1, Der p 2, Der p 23, and Der p 7, a nucleotide sequence encoding a transmembrane domain and a nucleotide sequence encoding an endosomal/lysosomal targeting domain of LAMP in this order.

A DNA sequence encoding Der p1 protein having a particular base sequence is codon-optimized for the Pichia pastoris expression system, which is conducive to expressing Der p1 in Pichia pastoris. After gene optimization and adding an activating element to increase the expression of Der p1 in molecular level, it was found that Der p1 is expressed at a higher level as compared with the prior art and has biological activity similar to the natural protein.

The present invention provides a measurement device which is compact and portable and is simply operated, and which is capable of quantifying the amount of an object to be inspected with high sensitivity and high accuracy. A measurement device of the present invention includes an SPR sensor cell, a light source, and a light receiving element. The SPR sensor cell includes a plurality of optical waveguides. At least one of the plurality of optical waveguides forms a detection unit together with a metal layer onto which a recognition substance for an object to be inspected is fixed, and at least another one of the plurality of optical waveguides forms a reference unit together with a metal layer free of the recognition substance.