Nucleic acid construct for use in screening for peptide antibody, and screening method using same

Abstract

The present invention provides a novel tool for simply screening a candidate molecule for an antibody and a method for screening a candidate molecule for an antibody using the tool. A nucleic acid construct includes: (x) an encoding nucleic acid of an antibody candidate, obtained by inserting an encoding nucleic acid of any peptide into an encoding nucleic acid of an antibody; (y) an encoding nucleic acid of a peptide tag; and (z) an encoding nucleic acid of an aptamer that is bindable to the peptide tag are used. When this nucleic acid construct is expressed, a complex of a fusion transcript of the encoding nucleic acids (x) to (z) and a fusion translation product of the encoding nucleic acids (x) and (y) is formed. When this complex and an antigen are brought into contact with each other, and the complex binding to the antigen is recovered, peptide that is bindable to the antigen and the encoding nucleic acid of the peptide can be identified from a transcript of an encoding nucleic acid of the any peptide in the complex.

Dependencies are inferred from the claim text.