FIELD: chemistry.
SUBSTANCE: invention relates to biotechnology, specifically to obtaining modified IGF-1 proteins and can be used in medicine. Constructed is a polypeptide which contains a human IGF-1 precursor protein, wherein amino acids G1, P2 and E3 are removed as a result of deletion or amino acid E3 is removed as a result of deletion, and wherein amino acid R37 is replaced with alanine and amino acids R71 and R72 are removed as a result of deletion. The cleavage of the E-peptide from IGF-1 by a protease is reduced as a result of said modifications. The obtained polypeptide is used to treat a musculoskeletal disease, diabetes, conditions associated with neuron death, anaemia, chronic obstructive pulmonary disease and burn injury.
EFFECT: invention enables to obtain stabilised polypeptides containing a modified sequence of an IGF-1 precursor, in which the cleavage of the E-peptide from IGF1 which occurs in natural physiological conditions is reduced.
21 cl, 12 dwg, 1 tbl, 82 ex
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