Method for producing recombinant insulin from fusion proteins.

摘要

This invention relates to a DNA encoding a fusion protein of formula (I) ÄYÜ-ÄX1Ü-ÄB-chainÜ-ÄX2Ü-ÄLinkerÜ-ÄX3Ü-ÄA-chainÜ wherein Y is a leader peptide sequence for the expression and secretion of the protein, comprising at least one amino acid residue; X1 is an amino acid sequence which is cleavable enzymatically or chemically; B-chain is the amino acid sequence of insulin B chain; X2 is an amino acid sequence which is cleavable enzymatically; Linker is a linker sequence comprising at least one amino acid residue; X3 is an amino acid sequence which is cleavable enzymatically; and A- chain is the amino acid sequence of insulin A chain, and to a method for producing insulin using an expression system containing the DNA in high efficiency and high yield.