L- arginine, manufacturing method of l- ornithine or l- citrulline

According to the present invention, (i) SEQ ID NO: 1 in the amino acid sequence one or more amino acids from the N-terminal amino acid sequence first 20-38 amino acid sequence have been substituted represented, or (ii) SEQ ID NO: 1 in represented by one or more amino acids from the N-terminal amino acid sequence first 20-38 amino acid sequence is substituted, and one or more amino acids of the 1-19 th or 39 to 294 amino acid sequence is deleted loss, there is provided a polypeptide having a substituted or added has an amino acid sequence, and N- acetylglutamate kinase activity.