DNAs encoding new fusion proteins and processes for preparing useful polypeptides through expression of the DNAs

摘要

This invention relates to a DNA comprising a nucleotide sequence encoding a fusion protein, wherein the fusion protein comprises: a sequence of a signal peptide of a Bacillus cell wall protein (CWP) ; a tag sequence for separation and purification of the fusion protein; a linker sequence; a sequence for chemical or enzymatic cleavage; and an exogenous polypeptide sequence, said sequences being linked in order, said signal peptide, tag and linker being optional sequences. The nucleotide sequence encoding a fusion protein is ligated to the 3'-end of a nucleic acid sequence comprising a Bacillus promoter region. The invention also relates to a vector comprising the DNA; to a bacterium belonging to the genus Bacillus comprising the vector; and to a process for preparation of a useful polypeptide by culture of the bacterium. <IMAGE>