Signal peptide and DNA sequences coding thereof.

摘要

The invention relates to a signal peptide of formula: MXKSTLLLLFLLLCLPSWNAGA where A = alanine C = cysteine F = phenylalanine G = glycine K = lysine L = leucine M = methionine N = asparagine P = proline S = serine T = threonine W = triptophane and X denotes a direct bond between M and K, an amino acid chosen from the group of the 20 amino acids of the genetic code or a peptide containing 2, 3 or 4 amino acids, each chosen independently of the others from the group of the 20 amino acids of the genetic code. It also relates to the DNA sequences coding for the latter, the expression vectors carrying one of these sequences, the Gram-negative bacteria transformed by these vectors and the process for periplasmic production of a polypeptide. Application: Manufacture of polypeptides such as hGH or hirudine.