Abstract: It is intended to provide thermotolerant and antimicrobial proteins having a broad antibacterial spectrum and being useful in the agricultural, medical and industrial field; and plants resistant to pathogenic microorganisms. Namely, DNAs comprising the base sequences represented by SEQ ID NOS: 1 to 5 respectively; antimicrobial proteins encoded by these DNAs; and fungicides, antibacterial agents and antibacterial/antifungal agents for industrial use comprising the antimicrobial proteins as the active ingredient.

Abstract: It is intended to provide thermotolerant and antimicrobial proteins having a broad antibacterial spectrum and being useful in the agricultural, medical and industrial field; and plants resistant to pathogenic microorganisms. Namely, DNAs comprising the base sequences represented by SEQ ID NOS: 1 to 5 respectively; antimicrobial proteins encoded by these DNAs; and fungicides, antibacterial agents and antibacterial/antifungal agents for industrial use comprising the antimicrobial proteins as the active ingredient.

Abstract: An object of the present invention is to provide antibacterial peptides of high safety, improved antibacterial activity, wide antibacterial spectrum and lower molecular weight, and antibacterial agents containing such peptides as an effective ingredient, whose effects on in vivo immune system is decreased because of lower molecular weight thereof when they are given. To achieve this object, there are provided antibacterial peptides represented by the following formula: X-Ala-Ile-Arg-Lys-Arg-NH2  (1) wherein X is a peptide in which one or more than two amino acid residues are linked by peptide linkage, and Arg-NH2 means that a carboxyl group of Arg is amidated.