The present invention discloses an
epidermal growth factor -
linker polypeptide - collagen, and the
linker polypeptide has an
amino acid sequence as shown in SEQ ID No.1. In the present invention, a
linker polypeptide capable of connecting EGF and collagen is designed and synthesized. The N - terminal of the linker polypeptide mimics the EGF
receptor structure and can bind to EGF, and the connection between the linker polypeptide and EGF is through non - covalent van der Waals forces, which will not destroy the structure of EGF; the C - terminal of the linker polypeptide is rich in
lysine residues and can be covalently cross - linked to collagen through transglutaminase to form EGF - linker polypeptide - collagen. The
protein solution with the above - mentioned EGF - linker polypeptide - collagen as the
active ingredient not only has low
cytotoxicity and high
biological safety, but also can significantly prolong the action time of
epidermal growth factor. In addition, it can form a stable repair microenvironment on the surface of the
endometrium and significantly improve the repair effect of endometrial injury.