FIELD: chemistry; biochemistry.
SUBSTANCE: present invention pertains to biotechnology. Description is given of a phage particle, exposing on its surface, T-cell receptor (TCR), which is a human scTCR. The exposed dTCR polypeptide pair or exposed scTCR polypeptide contains a series of α and β chains of extra-cellular constant lg of the native TCR domain. A disulphide bond joins amino acid residues of the given series of chains of the constant lg domain, where the given disulphide bond is between cysteic residues. Presented is a library of polypeptide pairs of mutated TCR or scTCR polypeptides, exposed on the described phage particle. Nucleic acid, which encodes the described phage particle, is also presented. A method of identifying TCRs is invented. The invention can be used for making various TCR libraries, for identification of high-affinity TCRs.
EFFECT: possibility of making various TCR libraries for identification of high-affinity TCRs.
17 cl, 25 ex, 63 dwg, 2 tbl
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