The invention relates to the technical field of therapeutic cyclopeptide-containing polypeptides, in particular to a cyclopeptide-containing polypeptide compound, application of the cyclopeptide-containing polypeptide compound and a long-acting
amylin medicine. The polypeptide compound containing the
cyclic peptide is selected from the following compounds shown in the following
structural formula: R < 1-gamma > Glu-Arg-Asp-Gly-Thr-Ala-Thr-Lys-Ala-Thr-Glu-Arg-Leu-Ala-X < 15 >-X < 16 >-X < 17 >-Gln-Arg-Ser-Ser-X < 22 >-X < 23 >-X < 24 >-X < 25 >-X < 26 >-Ser-X < 28 >-Thr-Glu-Val-Gly-Sr-Asn-Thr-{Hyp}-NH2 (Lactm bridge: Asp < 3 >-Lys8), and the
structural formula of the polypeptide compound containing the
cyclic peptide is shown in the description, (Lactm bridge: Asp3-Lys8) represents an intramolecular
lactam bridge formed between side chains of residues of a third
amino acid Asp and an eighth
amino acid Lys which are counted from an R1 end; r1 represents that R2 is independently selected from any one of a carboxyl group, a
carboxylate group, a tetrazolyl group, a
phosphate group, a
phosphate group, a
sulfonic acid group and a
sulfonate group; n is any integer from 10 to 24; x < 15 >, X < 16 >, X < 17 >, X < 22 >, X < 23 >, X < 24 >, X < 25 >, X < 26 > and X < 28 > are respectively and independently selected from amino acids. As an
amylin drug with a novel structure, the
amylin derivative is a multi-
target drug and has relatively good
biological activity and
bioavailability.