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Last Updated: April 20, 2024

Claims for Patent: 8,188,033


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Summary for Patent: 8,188,033
Title:Anti-microbial peptidomimetic compounds and methods to calculate anti-microbial activity
Abstract: This invention encompasses synthetic antimicrobial peptide analogs having certain un-natural amino acids, including the un-natural amino acids hydrophobic tetrahydroisoquinolinecarboxylic acid (Tic) and octahydroindolecarboxylic acid (Oic), incorporated into the polypeptide backbone. These antimicrobial peptides (AMPs) are useful to treat infection in humans and other mammals of such bacteria as Gram positive bacteria, Gram negative bacteria and Mycobacterium. Many of the AMPs also exhibit the property of reduced hemolytic activity. The invention also entails 3D-QSAR models and mathematical equations that calculate the biological activity of any peptide sequence against Staphylococcus aureus or Mycobacterium ranae.
Inventor(s): Hicks; Rickey P. (Greenville, NC), Venugopal; Diva Karamenon (Gaithersburg, MD), Bhonsle; Jayendra (Germantown, MD)
Assignee:
Application Number:12/004,397
Patent Claims:1. A synthetic antimicrobial peptide analog having a formula selected from the group consisting of: .SIGMA.-Glycine-O-(Tic-Oic-X-J-Tic-Oic-X--Z).sub.n-Tic-Oic-.PI.-J-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Tic-Oic-X--Z-Tic-Oic-X-J).sub.n-Tic-Oic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-B-(Tic-Oic-X--Z-Tic-Oic-X-J).sub.n-Tic-Oic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Tic-Oic-X-J-Tic-Oic-X--Z).sub.n-Tic-Oic-.PI.-J-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Tic-Oic-X--Z-Tic-Oic-X-J).sub.n-Tic-Oic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-B-(Tic-Oic-X--Z-Tic-Oic-X-J).sub.n-Tic-Oic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Tic-Oic-X-J-Tic-Oic-X--Z).sub.n-Tic-Oic-.PI.-J-Tic-U.s- ub.m--CONH--(CH.sub.2).sub.k--NH.sub.2 .SIGMA.-Glycine-O-(Tic-Oic-X-J-Tic-Oic-X--Z).sub.n-Tic-.PI.-U.sub.m--CONH- .sub.2 .SIGMA.-Glycine-O-(Tic-Oic-X-J-Tic-Oic-X--Z).sub.n-Oic-.PI.-U.sub.- m--CONH.sub.2 .SIGMA.-Glycine-O-(Tic-Oic-X--Z-Tic-Oic-X-J).sub.n-Tic-.PI.-U.sub.m--CONH- .sub.2, .SIGMA.-Glycine-O-(Tic-Oic-X--Z-Tic-Oic-X-J).sub.n-Oic-.PI.-U.sub.- m--CONH.sub.2 .SIGMA.-Glycine-O-(Tic-Oic-Z-Tic-Oic-J).sub.n-Tic-Oic-Z-Tic-U.sub.m--CONH- .sub.2 .SIGMA.-Glycine-B-(Tic-Oic-Z-Tic-Oic-J).sub.n-Tic-Oic-Z-Tic-U.sub.- m--CONH.sub.2 .SIGMA.-Glycine-O-(Tic-Tic-X-J-Tic-Tic-X--Z).sub.n-Tic-Tic-.PI.-J-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Tic-Tic-X--Z-Tic-Tic-X-J).sub.n-Tic-Tic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-B-(Tic-Tic-X--Z-Tic-Tic-X-J).sub.n-Tic-Tic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Tic-Tic-X-J-Tic-Tic-X--Z).sub.n-Tic-Tic-.PI.-J-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Tic-Tic-X--Z-Tic-Tic-X-J).sub.n-Tic-Tic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-B-(Tic-Tic-X--Z-Tic-Tic-X-J).sub.n-Tic-Tic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Tic-Tic-X-J-Tic-Tic-X--Z).sub.n-Tic-Tic-.PI.-J-Tic-U.s- ub.m--CONH--(CH.sub.2).sub.k--NH.sub.2 .SIGMA.-Glycine-O-(Tic-Tic-X-J-Tic-Tic-X--Z).sub.n-Tic-.PI.-U.sub.m--CONH- .sub.2 .SIGMA.-Glycine-O-(Tic-Tic-X-J-Tic-Tic-X--Z).sub.n-Tic-.PI.-U.sub.- m--CONH.sub.2 .SIGMA.-Glycine-O-(Tic-Tic-X--Z-Tic-Tic-X-J).sub.n-Tic-.PI.-U.sub.m--CONH- .sub.2, .SIGMA.-Glycine-O-(Tic-Tic-X--Z-Tic-Tic-X-J).sub.n-Tic-.PI.-U.sub.- m--CONH.sub.2, .SIGMA.-Glycine-O-(Tic-Tic-Z-Tic-Tic-J).sub.n-Tic-Tic-Z-Tic-U.sub.m--CONH- .sub.2 .SIGMA.-Glycine-B-(Tic-Tic-Z-Tic-tic-J).sub.n-Tic-Tic-Z-Tic-U.sub.- m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Tic-X-J-Oic-Tic-X--Z).sub.n-Oic-Tic-.PI.-J-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Tic-X--Z-Oic-Tic-X-J).sub.n-Oic-Tic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-B-(Oic-Tic-X--Z-Oic-Tic-X-J).sub.n-Oic-Tic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Tic-X-J-Oic-Tic-X--Z).sub.n-Oic-Tic-.PI.-J-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Tic-X--Z-Oic-Tic-X-J).sub.n-Oic-Tic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-B-(Oic-Tic-X--Z-Oic-Tic-X-J).sub.n-Oic-Tic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Tic-X-J-Tic-Tic-X--Z).sub.n-Tic-Tic-.PI.-J-Tic-U.s- ub.m--CONH--(CH.sub.2).sub.k--NH.sub.2 .SIGMA.-Glycine-O-(Oic-Tic-X-J-Oic-Tic-X--Z).sub.n-Tic-.PI.-U.sub.m--CONH- .sub.2 .SIGMA.-Glycine-O-(Oic-Tic-X-J-Oic-Tic-X--Z).sub.n-Tic-.PI.-U.sub.- m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Tic-X--Z-Oic-Tic-X-J).sub.n-Tic-.PI.-U.sub.m--CONH- .sub.2, .SIGMA.-Glycine-O-(Oic-Tic-X--Z-Oic-Tic-X-J).sub.n-Tic-.PI.-U.sub.- m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Tic-Z-Oic-Tic-J).sub.n-Oic-Tic-Z-Tic-U.sub.m--CONH- .sub.2 .SIGMA.-Glycine-B-(Oic-Tic-Z-Oic-tic-J).sub.n-Oic-Tic-Z-Tic-U.sub.- m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Oic-X-J-Oic-Oic-X--Z).sub.n-Oic-Oic-.PI.-J-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Oic-X--Z-Oic-Oic-X-J).sub.n-Oic-Oic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-B-(Oic-Oic-X--Z-Oic-Oic-X-J).sub.n-Oic-Oic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Oic-X-J-Oic-Oic-X--Z).sub.n-Oic-Oic-.PI.-J-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Oic-X--Z-Oic-Oic-X-J).sub.n-Oic-Oic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-B-(Oic-Oic-X--Z-Oic-Oic-X-J).sub.n-Oic-Oic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Oic-X-J-Oic-Oic-X--Z).sub.n-Oic-Oic-.PI.-J-Tic-U.s- ub.m--CONH--(CH.sub.2).sub.k--NH.sub.2 .SIGMA.-Glycine-O-(Oic-Oic-X-J-Oic-Oic-X--Z).sub.n-Tic-.PI.-U.sub.m--CONH- .sub.2 .SIGMA.-Glycine-O-(Oic-Oic-X-J-Oic-Oic-X--Z).sub.n-Tic-.PI.-U.sub.- m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Oic-X--Z-Oic-Oic-X-J).sub.n-Tic-.PI.-U.sub.m--CONH- .sub.2, .SIGMA.-Glycine-O-(Oic-Oic-X--Z-Oic-Oic-X-J).sub.n-Tic-.PI.-U.sub.- m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Oic-Z-Oic-Oic-J).sub.n-Oic-Oic-Z-Tic-U.sub.m--CONH- .sub.2 .SIGMA.-Glycine-B-(Oic-Oic-Z-Oic-tic-J).sub.n-Oic-Oic-Z-Tic-U.sub.- m--CONH.sub.2 .SIGMA.-U.sub.m-Glycine-O-(Tic-Oic-X-J-Tic-Oic-X--Z).sub.n-Tic-Oic-.PI.-J- -Tic-CONH.sub.2 .SIGMA.-U.sub.m-Glycine-O-(Tic-Oic-X--Z-Tic-Oic-X-J).sub.n-Tic-Oic-.PI.-Z- -Tic-CONH.sub.2 .SIGMA.-U.sub.m-Glycine-B-(Tic-Oic-X--Z-Tic-Oic-X-J).sub.n-Tic-Oic-.PI.-Z- -Tic-CONH.sub.2 .SIGMA.-U.sub.m-Glycine-O-(Tic-Oic-X-J-Tic-Oic-X--Z).sub.n-Tic-Oic-.PI.-J- -Tic-CONH.sub.2 .SIGMA.-U.sub.m-Glycine-O-(Tic-Oic-X--Z-Tic-Oic-X-J).sub.n-Tic-Oic-.PI.-Z- -Tic-CONH.sub.2 .SIGMA.-U.sub.m-Glycine-B-(Tic-Oic-X--Z-Tic-Oic-X-J).sub.n-Tic-Oic-.PI.-Z- -Tic-CONH.sub.2 .SIGMA.-U.sub.m-Glycine-O-(Tic-Oic-X-J-Tic-Oic-X--Z).sub.n-Tic-Oic-.PI.-J- -Tic-CONH--(CH.sub.2).sub.k--NH.sub.2 .SIGMA.-U.sub.m-Glycine-O-(Tic-Oic-X-J-Tic-Oic-X--Z).sub.n-Tic-.PI.-CONH.- sub.2 .SIGMA.-U.sub.m-Glycine-O-(Tic-Oic-X-J-Tic-Oic-X--Z).sub.n-Oic-.PI.- -CONH.sub.2 .SIGMA.-U.sub.m-Glycine-O-(Tic-Oic-X--Z-Tic-Oic-X-J).sub.n-Tic-.PI.-CONH.- sub.2 .SIGMA.-U.sub.m-Glycine-O-(Tic-Oic-X--Z-Tic-Oic-X-J).sub.n-Oic-.PI.- -CONH.sub.2, .SIGMA.-U.sub.m-Glycine-O-(Tic-Tic-X-J-Tic-Tic-X--Z).sub.n-Tic-Oic-.PI.-J- -Tic-CONH.sub.2 .SIGMA.-U.sub.m-Glycine-O-(Tic-Tic-X--Z-Tic-Tic-X-J).sub.n-Tic-Oic-.PI.-Z- -Tic-CONH.sub.2 .SIGMA.-U.sub.m-Glycine-B-(Tic-Tic-X--Z-Tic-Tic-X-J).sub.n-Tic-Oic-.PI.-Z- -Tic-CONH.sub.2 .SIGMA.-U.sub.m-Glycine-O-(Tic-Tic-X-J-Tic-Tic-X--Z).sub.n-Tic-Oic-.PI.-J- -Tic-CONH.sub.2 .SIGMA.-U.sub.m-Glycine-O-(Tic-Tic-X--Z-Tic-Tic-X-J).sub.n-Tic-Oic-.PI.-Z- -Tic-CONH.sub.2 .SIGMA.-U.sub.m-Glycine-B-(Tic-Tic-X--Z-Tic-Tic-X-J).sub.n-Tic-Oic-.PI.-Z- -Tic-CONH.sub.2, .SIGMA.-U.sub.m-Glycine-O-(Tic-Tic-X-J-Tic-Tic-X--Z).sub.n-Tic-Oic-.PI.-J- -Tic-CONH--(CH.sub.2).sub.k--NH.sub.2 .SIGMA.-U.sub.m-Glycine-O-(Tic-Tic-X-J-Tic-Tic-X--Z).sub.n-Tic-.PI.-CONH.- sub.2 .SIGMA.-U.sub.m-Glycine-O-(Tic-Tic-X-J-Tic-Tic-X--Z).sub.n-Oic-.PI.- -CONH.sub.2 .SIGMA.-U.sub.m-Glycine-O-(Tic-Tic-X--Z-Tic-Tic-X-J).sub.n-Tic-.PI.-CONH.- sub.2, and .SIGMA.-U.sub.m-Glycine-O-(Tic-Tic-X--Z-Tic-Tic-X-J).sub.n-Oic-- .PI.-CONH.sub.2 wherein Tic stands for tetrahydroisoquinolinecarboxylic acid, Oic stands for octahydroindolecarboxylic acid, .SIGMA. is acetyl, NH.sub.2, biotin, .beta.-thienylalanine (Thi), cysteine, Keyhole Limpet Haemocyanin (KLH), or Bovine Serum Albumine (BSA), U is lysine, arginine, histidine, ornithine, 2,3-diaminopropionic acid (Dpr), diaminobutanoic acid (Dab), 4-aminopiperidine-4-carboxylic acid (Apc4), or 3-aminopiperidine-3-carboxylic acid (Apc3), X is glycine, alanine, .beta.-alanine, gamma-aminobutyric acid (Gaba), .di-elect cons.-aminohexanoic acid (Ahx), phenylglycine (Phg), 9-aminooctanoic acid (9-Aoa), 10-aminodecanoic acid (10Ada), 12-aminododecanoic acid (12-Adda), or 16-aminopalmitic acid (16-Apa), J is lysine, arginine, histidine, ornithine, 2,3-diaminopropionic acid (Dpr), or 2,4-diaminobutanoic acid (Dab), Z is phenylalanine, tyrosine, tryptophan, 4-fluorophenylalanine (Fpa), 4-chlorophenylalanine (Cph), 4-nitrophenylalanine (Nph), phenyl glycine (Phg), valine, isoleucine, norvaline, norleucine, norisoleucine, 4-Aminobutyric acid, piperidinic acid, 6-Aminocaproic acid, 2-Aminoheptanoic acid, 2-Aminoisobutyric acid, 3-Aminoisobutyric acid, 2-Aminopimelic acid, 2,4-Diaminobutyric acid, N-Ethylglycine, allo-Isoleucine, N-Methylglycine, N-Methylisoleucine, or N-Methylvaline, O is phenylalanine, leucine, valine or isoleucine, B is lysine, arginine, histidine, ornithine, 2,3-diaminopropionic acid (Dpr), 2,4-diaminobutanoic acid (Dab), 4-aminopiperidine-4-carboxylic acid (Apc4), or 3-aminopiperidine-3-carboxylic acid (Apc3), .PI. is glycine, alanine, .beta.-alanine, gamma-aminobutyric acid (Gaba), or .di-elect cons.-Aminohexanoic acid (Ahx), n is 1 to 4 repeating units, m is 1 to 5 repeating units, and k is 1 to 5 repeating units.

2. The antimicrobial peptide of claim 1, which in its secondary structure includes at least three .beta.-turns and exhibits sufficient conformational flexibility to bind to the membrane of at least one of Gram positive bacteria, Gram negative bacteria or Mycobacterium.

3. The antimicrobial peptide of claim 1, which exhibits less hemolytic activity than naturally occurring non-selective antimicrobial peptides.

4. The antimicrobial peptide of claim 1, which is selected from the group consisting of NH.sub.2-GKGL-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-- Oic-GKR--CONH.sub.2 (SEQ ID NO:4) NH.sub.2-GKGL-Tic-Oic-GR-Tic-Oic-GF-Tic-Oic-GR-Tic-Oic-GF-Tic-Oic-GR-Tic-- Oic-GKR--CONH.sub.2 (SEQ ID NO:5) NH.sub.2-GKGL-Tic-Oic-GL-Tic-Oic-GK-Tic-Oic-GL-Tic-Oic-GK-Tic-Oic-GL-Tic-- Oic-GLR--CONH.sub.2 (SEQ ID NO:6) NH.sub.2-GKGL-Tic-Oic-GK-Tic-Oic-GL-Tic-Oic-GK-Tic-Oic-GL-Tic-Oic-GK-Tic-- Oic-GK LR--CONH.sub.2 (SEQ ID NO:7) NH.sub.2-GKGL-Tic-Oic-FK-Tic-Oic-KF-Tic-Oic-FK-Tic-Oic-KF-Tic-Oic-FK-Tic-- Oic-FKR--CONH.sub.2 (SEQ ID NO:8) NH.sub.2--KL-Tic-Oic-K-Tic-Oic-F-Tic-Oic-K-Tic-Oic-F-Tic-Oic-K-Tic-Oic-KR- --CONH.sub.2 (SEQ ID NO:9) Ac-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-KKKK--CONH.sub.2 (SEQ ID NO:10) Ac-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-KKKK--CONH--CH2-CH2-NH.- sub.2 (SEQ ID NO:11) Ac-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-KKKK--CONH--CH.sub.2--CH.sub.2- --CH.sub.2--NH.sub.2 (SEQ ID NO:12) NH.sub.2-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-KKKK--CONH.sub.2 (SEQ ID NO:13) NH.sub.2--KL-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-KKKK--CONH.sub.2 (SEQ ID NO:14) Ac-F-Tic-Oic-K-Tic-Oic-F-Tic-Oic-K-Tic-KKKK--CONH.sub.2 (SEQ ID NO:15) Ac-Gaba-F-Tic-Oic-Gaba-K-Tic-Oic-Gaba-F-Tic-Oic-Gaba-K-Tic-KKKK--CONH.sub- .2 (SEQ ID NO:16) Ac-G-Tic-Oic-K-Tic-Oic-G-Tic-Oic-K-Tic-KKKK--CONH.sub.2 (SEQ ID NO:17) Ac-GF-Oic-GK-Oic-GF-Oic-GKKKKK--CONH.sub.2 (SEQ ID NO:18) Ac-GF-Tic-GK-Tic-GF-Tic-GK-Tic-KKKK--CONH.sub.2 (SEQ ID NO:19) Ac-GF-Tic-G-GK-Tic-G-GF-Tic-G-GK-Tic-KKKK--CONH.sub.2 (SEQ ID NO:20) Ac-GF-G-Oic-GK-G-Oic-GF-G-Oic-GK-G-KKKK--CONH.sub.2 (SEQ ID NO:21) Ac-GF-F-Oic-GK-F-Oic-GF-F-Oic-GK-F-KKKK--CONH.sub.2 (SEQ ID NO:22) Ac-.beta.Ala-F-Tic-Oic-.beta.Ala-K-Tic-Oic-.beta.Ala-F-Tic-Oic-.beta.Ala-- K-Tic-KKKK--CONH.sub.2 (SEQ ID NO:23) Ac-Alix-F-Tic-Oic-Ahx-K-Tic-Oic-Ahx-F-Tic-Oic-Ahx-K-Tic-KKKK--CONH.sub.2 (SEQ ID NO:24) Ac-F-Tic-Oic-K-Tic-Oic-F-Tic-Oic-K-Tic-KKKKKK--CONH.sub.2 (SEQ ID NO:25) Ac-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-KKKKK--CONH.sub.2 (SEQ ID NO:26) Ac-Gaba-F-Tic-Oic-Gaba-K-Tic-Oic-Gaba-F-Tic-Oic-Gaba-K-Tic-KKKKK--- CONH.sub.2 (SEQ ID NO:27) Ac-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-Orn-Orn-Orn-Orn-CONH.sub.2(SEQ ID NO:28) Ac-G-Fpa-Tic-Oic-GK-Tic-Oic-G-Fpa-Tic-Oic-GK-Tic-KKKK--CONH.sub- .2 (SEQ ID NO:29) Ac-GF-Tic-Oic-G-Orn-Tic-Oic-GF-Tic-Oic-G-Orn-Tic-Orn-Orn-Orn-Orn-CONH.sub- .2 (SEQ ID NO:30) Biotin-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-KKKK--CONH.sub.2 (SEQ ID NO:31) Ac-GF-Tic-Oic-G-Dpr-Tic-Oic-GF-Tic-Oic-G-Dpr-Tic-Dpr-DprDpr-Dpr-CO- NH.sub.2 (SEQ ID NO:32) Ac-.beta.Ala-Fpa-Tic-Oic-.beta.Ala-Dpr-Tic-Oic-.beta.Ala-Fpa-Tic-Oic-.bet- a.Ala-Dpr-Tic-Dpr-Dpr-Dpr-Dpr-CONH.sub.2 (SEQ ID NO:33) Ac-G-dF-Tic-Oic-GK-Tic-Oic-G dF-Tic-Oic-GK-Tic-KKKK--CONH.sub.2 Ac-GF-Tic-Oic-G-dK-Tic-Oic-GF-Tic-Oic-G-dK-Tic-KKKK--CONH.sub.2 Ac-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-Dpr-Dpr-Dpr-Dpr-CONH.sub.2 (SEQ ID NO:46) (NH.sub.2).sub.4--(K).sub.2--K-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-Oic-G- F-Tic-Oic-GK-Tic-CONH.sub.2 (SEQ ID NO:47) Ac-G-Fpa-Tic-Oic-G-Dpr-Tic-Oic-G-Fpa-Tic-Oic-G-Dpr-Tic-Dpr-Dpr-Dpr-Dpr-CO- NH.sub.2 (SEQ ID NO:48) Ac-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-.beta.A-KKKK--CONH.sub.2 (SEQ ID NO:35) Ac-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-Gaba-KKKK--CONH.sub.- 2 (SEQ ID NO:36) Ac-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-Ahx-KKKK--CONH.sub.2 (SEQ ID NO:37) Ac-GF-Tic-Oic-G-Dab-Tic-Oic-GF-Tic-Oic-G-Dab-Tic-Dab-Dab-Dab-Dab-C- ONH.sub.2 (SEQ ID NO:38) Ac-GF-Tic-Oic-G-Tic-Oic-GF-Tic-Oic-G-Tic-G-KKKK--CONH.sub.2 (SEQ ID NO:49) Ac-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-Dab-Dab-Dab-Dab-CONH.su- b.2 (SEQ ID NO:50) (NH.sub.2).sub.4-(Orn).sub.2-Orn-Tic-Oic-G-Orn-Tic-Oic-GF-Tic-Oic-G-Orn-T- ic-Oic-GF-Tic-Oic-G-Orn-Tic-CONH.sub.2 (SEQ ID NO:51) Thi-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-G-KKKK--CONH.sub.2 (SEQ ID NO:52) Ac-GF-Tic-Oic-GR-Tic-Oic-GF-Tic-Oic-GR-Tic-RRRR--CONH.sub.2 (SEQ ID NO:41) Ac-GF-Tic-Tic-GK-Tic-Tic-GF-Tic-Tic-GK-Tic-KKKK--CONH.sub.2 (SEQ ID NO:42) Ac-GF-Oic-Oic-GK-Oic-Oic-GF-Oic-Oic-GK-Oic-KKKK--CONH.sub.2 (SEQ ID NO:53) Cys-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-G-KKKK--CONH.sub.2 (SEQ ID NO:54) (NH.sub.2).sub.4-(Dpr).sub.2-Dpr-Tic-Oic-G-Dpr-Tic-Oic-GF-Tic-Oic-G-Dpr-T- ic-Oic-GF-Tic-Oic-G-Dpr-Tic-CONH.sub.2 (SEQ ID NO:55) (NH.sub.2).sub.4-(Dab).sub.2-Dab-Tic-Oic-G-Dab-Tic-Oic-GF-Tic-Oic-G-Dab-T- ic-Oic-GF-Tic-Oic-G-Dab-Tic-CONH.sub.2 (SEQ ID NO:56) Ac-G-Nph-Tic-Oic-GK-Tic-Oic-G-Nph-Tic-Oic-GK-Tic-KKKK--CONH.sub.2 (SEQ ID NO:34) Thi-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-KKKK--CONH.sub.2 (SEQ ID NO:39) Ac-GF-Tic-Oic-GW-Tic-Oic-GF-Tic-Oic-GW-Tic-KKKK--CONH.sub.2 (SEQ ID NO:40) Ac-G-Cph-Tic-Oic-GK-Tic-Oic-G-Cph-Tic-Oic-GK-Tic-KKKK--CONH.sub.2 (SEQ ID NO:43) Ac-GF-Oic-Tic-GK-Oic-Tic-GF-Oic-Tic-GK-Tic-KKKK--CONH.sub.2 (SEQ ID NO:44) Ac-.beta.Ala-Fpa-Tic-Oic-.beta.Ala-K-Tic-Oic-.beta.Ala-Fpa-Tic-- Oic-.beta.Ala-K-Tic-Dpr-Dpr-Dpr-Dpr-CONH.sub.2, (SEQ ID NO:45) Ac-KKKK-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-CONH.sub.2 (SEQ ID NO:1), and Ac-KKKK-GF-Tic-Tic-GK-Tic-Tic-GF-Tic-Tic-GK-Tic-CONH.sub.2 (SEQ ID NO:57).

5. The antimicrobial peptide of claim 1, which is stably in association with a pharmaceutically acceptable adjuvant.

6. A method for treating at least one of Gram positive bacteria, Gram negative bacteria, Mycobacterium, Plasmodium falciparum, Candida albicans Cryptococcus neoformans, Botrytis cinerea, Fusarium culmorum or Neurospora crassa, comprising the step of administering to a mammal suspected of infection by at least one of Gram positive bacteria, Gram negative bacteria or Mycobacterium a pharmaceutically effective amount of at least one of the synthetic antimicrobial peptide analogs having a formula selected from the group consisting of: .SIGMA.-Glycine-O-(Tic-Oic-X-J-Tic-Oic-X--Z).sub.n-Tic-Oic-.PI.-J-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Tic-Oic-X--Z-Tic-Oic-X-J).sub.n-Tic-Oic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-B-(Tic-Oic-X--Z-Tic-Oic-X-J).sub.n-Tic-Oic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Tic-Oic-X-J-Tic-Oic-X--Z).sub.n-Tic-Oic-.PI.-J-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Tic-Oic-X--Z-Tic-Oic-X-J).sub.n-Tic-Oic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-B-(Tic-Oic-X--Z-Tic-Oic-X-J).sub.n-Tic-Oic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Tic-Oic-X-J-Tic-Oic-X--Z).sub.n-Tic-Oic-.PI.-J-Tic-U.s- ub.m--CONH--(CH.sub.2).sub.k--NH.sub.2 .SIGMA.-Glycine-O-(Tic-Oic-X-J-Tic-Oic-X--Z).sub.n-Tic-.PI.-U.sub.m--CONH- .sub.2 .SIGMA.-Glycine-O-(Tic-Oic-X-J-Tic-Oic-X--Z).sub.n-Oic-.PI.-U.sub.- m--CONH.sub.2 .SIGMA.-Glycine-O-(Tic-Oic-X--Z-Tic-Oic-X-J).sub.n-Tic-.PI.-U.sub.m--CONH- .sub.2, .SIGMA.-Glycine-O-(Tic-Oic-X--Z-Tic-Oic-X-J).sub.n-Oic-.PI.-U.sub.- m--CONH.sub.2 .SIGMA.-Glycine-O-(Tic-Oic-Z-Tic-Oic-J).sub.n-Tic-Oic-Z-Tic-U.sub.m--CONH- .sub.2 .SIGMA.-Glycine-B-(Tic-Oic-Z-Tic-Oic-J).sub.n-Tic-Oic-Z-Tic-U.sub.- m--CONH.sub.2 .SIGMA.-Glycine-O-(Tic-Tic-X-J-Tic-Tic-X--Z).sub.n-Tic-Tic-.PI.-J-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Tic-Tic-X--Z-Tic-Tic-X-J).sub.n-Tic-Tic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-B-(Tic-Tic-X--Z-Tic-Tic-X-J).sub.n-Tic-Tic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Tic-Tic-X-J-Tic-Tic-X--Z).sub.n-Tic-Tic-.PI.-J-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Tic-Tic-X--Z-Tic-Tic-X-J).sub.n-Tic-Tic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-B-(Tic-Tic-X--Z-Tic-Tic-X-J).sub.n-Tic-Tic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Tic-Tic-X-J-Tic-Tic-X--Z).sub.n-Tic-Tic-.PI.-J-Tic-U.s- ub.m--CONH--(CH.sub.2).sub.k--NH.sub.2 .SIGMA.-Glycine-O-(Tic-Tic-X-J-Tic-Tic-X--Z).sub.n-Tic-.PI.-U.sub.m--CONH- .sub.2 .SIGMA.-Glycine-O-(Tic-Tic-X-J-Tic-Tic-X--Z).sub.n-Tic-.PI.-U.sub.- m--CONH.sub.2 .SIGMA.-Glycine-O-(Tic-Tic-X--Z-Tic-Tic-X-J).sub.n-Tic-.PI.-U.sub.m--CONH- .sub.2, .SIGMA.-Glycine-O-(Tic-Tic-X--Z-Tic-Tic-X-J).sub.n-Tic-.PI.-U.sub.- m--CONH.sub.2, .SIGMA.-Glycine-O-(Tic-Tic-Z-Tic-Tic-J).sub.n-Tic-Tic-Z-Tic-U.sub.m--CONH- .sub.2 .SIGMA.-Glycine-B-(Tic-Tic-Z-Tic-tic-J).sub.n-Tic-Tic-Z-Tic-U.sub.- m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Tic-X-J-Oic-Tic-X--Z).sub.n-Oic-Tic-.PI.-J-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Tic-X--Z-Oic-Tic-X-J).sub.n-Oic-Tic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-B-(Oic-Tic-X--Z-Oic-Tic-X-J).sub.n-Oic-Tic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Tic-X-J-Oic-Tic-X--Z).sub.n-Oic-Tic-.PI.-J-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Tic-X--Z-Oic-Tic-X-J).sub.n-Oic-Tic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-B-(Oic-Tic-X--Z-Oic-Tic-X-J).sub.n-Oic-Tic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Tic-X-J-Tic-Tic-X--Z).sub.n-Tic-Tic-.PI.-J-Tic-U.s- ub.m--CONH--(CH.sub.2).sub.k--NH.sub.2 .SIGMA.-Glycine-O-(Oic-Tic-X-J-Oic-Tic-X--Z).sub.n-Tic-.PI.-U.sub.m--CONH- .sub.2 .SIGMA.-Glycine-O-(Oic-Tic-X-J-Oic-Tic-X--Z).sub.n-Tic-.PI.-U.sub.- m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Tic-X--Z-Oic-Tic-X-J).sub.n-Tic-.PI.-U.sub.m--CONH- .sub.2, .SIGMA.-Glycine-O-(Oic-Tic-X--Z-Oic-Tic-X-J).sub.n-Tic-.PI.-U.sub.- m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Tic-Z-Oic-Tic-J).sub.n-Oic-Tic-Z-Tic-U.sub.m--CONH- .sub.2 .SIGMA.-Glycine-B-(Oic-Tic-Z-Oic-tic-J).sub.n-Oic-Tic-Z-Tic-U.sub.- m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Oic-X-J-Oic-Oic-X--Z).sub.n-Oic-Oic-.PI.-J-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Oic-X--Z-Oic-Oic-X-J).sub.n-Oic-Oic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-B-(Oic-Oic-X--Z-Oic-Oic-X-J).sub.n-Oic-Oic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Oic-X-J-Oic-Oic-X--Z).sub.n-Oic-Oic-.PI.-J-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Oic-X--Z-Oic-Oic-X-J).sub.n-Oic-Oic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-B-(Oic-Oic-X--Z-Oic-Oic-X-J).sub.n-Oic-Oic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Oic-X-J-Oic-Oic-X--Z).sub.n-Oic-Oic-.PI.-J-Tic-U.s- ub.m--CONH--(CH.sub.2).sub.k--NH.sub.2 .SIGMA.-Glycine-O-(Oic-Oic-X-J-Oic-Oic-X--Z).sub.n-Tic-.PI.-U.sub.m--CONH- .sub.2 .SIGMA.-Glycine-O-(Oic-Oic-X-J-Oic-Oic-X--Z).sub.n-Tic-.PI.-U.sub.- m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Oic-X--Z-Oic-Oic-X-J).sub.n-Tic-.PI.-U.sub.m--CONH- .sub.2, .SIGMA.-Glycine-O-(Oic-Oic-X--Z-Oic-Oic-X-J).sub.n-Tic-.PI.-U.sub.- m--CONH.sub.2, .SIGMA.-Glycine-O-(Oic-Oic-Z-Oic-Oic-J).sub.n-Oic-Oic-Z-Tic-U.sub.m--CONH- .sub.2 .SIGMA.-Glycine-B-(Oic-Oic-Z-Oic-tic-J).sub.n-Oic-Oic-Z-Tic-U.sub.- m--CONH.sub.2 .SIGMA.-U.sub.m-Glycine-O-(Tic-Oic-X-J-Tic-Oic-X--Z).sub.n-Tic-Oic-.PI.-J- -Tic-CONH.sub.2 .SIGMA.-U.sub.m-Glycine-O-(Tic-Oic-X--Z-Tic-Oic-X-J).sub.n-Tic-Oic-.PI.-Z- -Tic-CONH.sub.2 .SIGMA.-U.sub.m-Glycine-B-(Tic-Oic-X--Z-Tic-Oic-X-J).sub.n-Tic-Oic-.PI.-Z- -Tic-CONH.sub.2 .SIGMA.-U.sub.mGlycine-O-(Tic-Oic-X-J-Tic-Oic-X--Z).sub.n-Tic-Oic-.PI.-J-- Tic-CONH.sub.2 .SIGMA.-U.sub.m-Glycine-O-(Tic-Oic-X--Z-Tic-Oic-X-J).sub.n-Tic-Oic-.PI.-Z- -Tic-CONH.sub.2 .SIGMA.-U.sub.m-Glycine-B-(Tic-Oic-X--Z-Tic-Oic-X-J).sub.n-Tic-Oic-.PI.-Z- -Tic-CONH.sub.2, .SIGMA.-U.sub.m-Glycine-O-(Tic-Oic-X-J-Tic-Oic-X--Z).sub.n-Tic-Oic-.PI.-J- -Tic-CONH--(CH.sub.2).sub.k--NH.sub.2 .SIGMA.-U.sub.m-Glycine-O-(Tic-Oic-X-J-Tic-Oic-X--Z).sub.n-Tic-.PI.-CONH.- sub.2 .SIGMA.-U.sub.m-Glycine-O-(Tic-Oic-X-J-Tic-Oic-X--Z).sub.n-Oic-.PI.- -CONH.sub.2 .SIGMA.-U.sub.m-Glycine-O-(Tic-Oic-X--Z-Tic-Oic-X-J).sub.n-Tic-.PI.-CONH.- sub.2 .SIGMA.-U.sub.m-Glycine-O-(Tic-Oic-X--Z-Tic-Oic-X-J).sub.n-Oic-.PI.- -CONH.sub.2 .SIGMA.-U.sub.m-Glycine-O-(Tic-Tic-X-J-Tic-Tic-X--Z).sub.n-Tic-Oic-.PI.-J- -Tic-CONH.sub.2 .SIGMA.-U.sub.m-Glycine-O-(Tic-Tic-X--Z-Tic-Tic-X-J).sub.n-Tic-Oic-.PI.-Z- -Tic-CONH.sub.2 .SIGMA.-U.sub.m-Glycine-B-(Tic-Tic-X--Z-Tic-Tic-X-J).sub.n-Tic-Oic-.PI.-Z- -Tic-CONH.sub.2 .SIGMA.-U.sub.mGlycine-O-(Tic-Tic-X-J-Tic-Tic-X--Z).sub.n-Tic-Oic-.PI.-J-- Tic-CONH.sub.2 .SIGMA.-U.sub.m-Glycine-O-(Tic-Tic-X--Z-Tic-Tic-X-J).sub.n-Tic-Oic-.PI.-Z- -Tic-CONH.sub.2 .SIGMA.-U.sub.m-Glycine-B-(Tic-Tic-X--Z-Tic-Tic-X-J).sub.n-Tic-Oic-.PI.-Z- -Tic-CONH.sub.2, .SIGMA.-U.sub.m-Glycine-O-(Tic-Tic-X-J-Tic-Tic-X--Z).sub.n-Tic-Oic-.PI.-J- -Tic-CONH--(CH.sub.2).sub.k--NH.sub.2 .SIGMA.-U.sub.m-Glycine-O-(Tic-Tic-X-J-Tic-Tic-X--Z).sub.n-Tic-.PI.-CONH.- sub.2 .SIGMA.-U.sub.m-Glycine-O-(Tic-Tic-X-J-Tic-Tic-X--Z).sub.n-Oic-.PI.- -CONH.sub.2 .SIGMA.-U.sub.m-Glycine-O-(Tic-Tic-X--Z-Tic-Tic-X-J).sub.n-Tic-.PI.-CONH.- sub.2 and .SIGMA.-U.sub.m-Glycine-O-(Tic-Tic-X--Z-Tic-Tic-X-J).sub.n-Oic-.- PI.-CONH.sub.2, wherein Tic stands for tetrahydroisoquinolinecarboxylic acid, Oic stands for octahydroindolecarboxylic acid, .SIGMA. is acetyl, NH.sub.2, biotin, .beta.-thienylalanine (Thi), cysteine, Keyhole Limpet Haemocyanin (KLH), or Bovine Serum Albumine (BSA), U is lysine, arginine, histidine, ornithine, 2,3-diaminopropionic acid (Dpr), diaminobutanoic acid (Dab), 4-aminopiperidine-4-carboxylic acid (Apc4), or 3-aminopiperidine-3-carboxylic acid (Apc3), X is glycine, alanine, .beta.-alanine, gamma-aminobutyric acid (Gaba), .di-elect cons.-aminohexanoic acid (Ahx), phenylglycine (Phg), 9-aminooctanoic acid (9-Aoa), 10-aminodecanoic acid (10Ada), 12-aminododecanoic acid (12-Adda), or 16-aminopalmitic acid (16-Apa), J is lysine, arginine, histidine, ornithine, 2,3-diaminopropionic acid (Dpr), or 2,4-diaminobutanoic acid (Dab), Z is phenylalanine, tyrosine, tryptophan, 4-fluorophenylalanine (Fpa), 4-chlorophenylalanine (Cph), 4-nitrophenylalanine (Nph), phenyl glycine (Phg), valine, isoleucine, norvaline, norleucine, norisoleucine, 4-Aminobutyric acid, piperidinic acid, 6-Aminocaproic acid, 2-Aminoheptanoic acid, 2-Aminoisobutyric acid, 3-Aminoisobutyric acid, 2-Aminopimelic acid, 2,4-Diaminobutyric acid, N-Ethylglycine, allo-Isoleucine, N-Methylglycine, N-Methylisoleucine, or N-Methylvaline, O is phenylalanine, leucine, valine or isoleucine, B is lysine, arginine, histidine, ornithine, 2,3-diaminopropionic acid (Dpr), 2,4-diaminobutanoic acid (Dab), 4-aminopiperidine-4-carboxylic acid (Apc4), or 3-aminopiperidine-3-carboxylic acid (Apc3), .PI. is glycine, alanine, .beta.-alanine, gamma-aminobutyric acid (Gaba), or .di-elect cons.-Aminohexanoic acid (Ahx), n is 1 to 4 repeating units, m is 1 to 5 repeating units, and k is 1 to 5 repeating units, and a pharmaceutically acceptable adjuvant.

7. The method of claim 6 wherein the antimicrobial peptide in its secondary structure includes at least three .beta.-turns and exhibits sufficient conformational flexibility to bind to the membrane of at least one of Gram positive bacteria, Gram negative bacteria or Mycobacterium.

8. The method of claim 6, wherein the antimicrobial peptide exhibits less hemolytic activity than naturally occurring non-selective antimicrobial peptides.

9. The method of claim 6, wherein the at least one antimicrobial peptide is selected from the group consisting of NH.sub.2-GKGL-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-- Oic-GKR--CONH.sub.2 (SEQ ID NO:4) NH.sub.2-GKGL-Tic-Oic-GR-Tic-Oic-GF-Tic-Oic-GR-Tic-Oic-GF-Tic-Oic-GR-Tic-- Oic-GKR--CONH.sub.2 (SEQ ID NO:5) NH.sub.2-GKGL-Tic-Oic-GL-Tic-Oic-GK-Tic-Oic-GL-Tic-Oic-GK-Tic-Oic-GL-Tic-- Oic-GLR--CONH.sub.2 (SEQ ID NO:6) NH.sub.2-GKGL-Tic-Oic-GK-Tic-Oic-GL-Tic-Oic-GK-Tic-Oic-GL-Tic-Oic-GK-Tic-- Oic-GK LR--CONH.sub.2 (SEQ ID NO:7) NH.sub.2-GKGL-Tic-Oic-FK-Tic-Oic-KF-Tic-Oic-FK-Tic-Oic-KF-Tic-Oic-FK-Tic-- Oic-FKR--CONH.sub.2 (SEQ ID NO:8) NH.sub.2--KL-Tic-Oic-K-Tic-Oic-F-Tic-Oic-K-Tic-Oic-F-Tic-Oic-K-Tic-Oic-KR- --CONH.sub.2 (SEQ ID NO:9) Ac-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-KKKK--CONH.sub.2 (SEQ ID NO:10) Ac-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-KKKK--CONH--CH2--CH2--N- H.sub.2 (SEQ ID NO:11) Ac-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-KKKK--CONH--CH.sub.2--CH.sub.2- --CH.sub.2--NH.sub.2 (SEQ ID NO:12) NH.sub.2-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-KKKK--CONH.sub.2 (SEQ ID NO:13) NH.sub.2--KL-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-KKKK--CONH.sub.2 (SEQ ID NO:14) Ac--F-Tic-Oic-K-Tic-Oic-F-Tic-Oic-K-Tic-KKKK--CONH.sub.2 (SEQ ID NO:15) Ac-Gaba-F-Tic-Oic-Gaba-K-Tic-Oic-Gaba-F-Tic-Oic-Gaba-K-Tic-KKKK--CONH.sub- .2 (SEQ ID NO:16) Ac-G-Tic-Oic-K-Tic-Oic-G-Tic-Oic-K-Tic-KKKK--CONH.sub.2 (SEQ ID NO:17) Ac-GF-Oic-GK-Oic-GF-Oic-GKKKKK--CONH.sub.2 (SEQ ID NO:18) Ac-GF-Tic-GK-Tic-GF-Tic-GK-Tic-KKKK--CONH.sub.2 (SEQ ID NO:19) Ac-GF-Tic-G-GK-Tic-G-GF-Tic-G-GK-Tic-KKKK--CONH.sub.2 (SEQ ID NO:20) Ac-GF-G-Oic-GK-G-Oic-GF-G-Oic-GK-G-KKKK--CONH.sub.2 (SEQ ID NO:21) Ac-GF-F-Oic-GK-F-Oic-GF-F-Oic-GK-F-KKKK--CONH.sub.2 (SEQ ID NO:22) Ac-.beta.Ala-F-Tic-Oic-.beta.Ala-K-Tic-Oic-.beta.Ala-F-Tic-Oic-.beta.Ala-- K-Tic-KKKK--CONH.sub.2 (SEQ ID NO:23) Ac-Ahx-F-Tic-Oic-Ahx-K-Tic-Oic-Ahx-F-Tic-Oic-Ahx-K-Tic-KKKK--CONH.sub.2 (SEQ ID NO:24) Ac--F-Tic-Oic-K-Tic-Oic-F-Tic-Oic-K-Tic-KKKKKK--CONH.sub.2 (SEQ ID NO:25) Ac-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-KKKKK--CONH.sub.2 (SEQ ID NO:26) Ac-Gaba-F-Tic-Oic-Gaba-K-Tic-Oic-Gaba-F-Tic-Oic-Gaba-K-Tic-KKKKK--- CONH.sub.2 (SEQ ID NO:27) Ac-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-Orn-Orn-Orn-Orn-CONH.sub.2(SEQ ID NO:28) Ac-G-Fpa-Tic-Oic-GK-Tic-Oic-G-Fpa-Tic-Oic-GK-Tic-KKKK--CONH.sub- .2 (SEQ ID NO:29) Ac-GF-Tic-Oic-G-Orn-Tic-Oic-GF-Tic-Oic-G-Orn-Tic-Orn-Orn-Orn-Orn-CONH.sub- .2 (SEQ ID NO:30) Biotin-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-KKKK--CONH.sub.2 (SEQ ID NO:31) Ac-GF-Tic-Oic-G-Dpr-Tic-Oic-GF-Tic-Oic-G-Dpr-Tic-Dpr-DprDpr-Dpr-CO- NH.sub.2 (SEQ ID NO:32) Ac-.beta.Ala-Fpa-Tic-Oic-.beta.Ala-Dpr-Tic-Oic-.beta.Ala-Fpa-Tic-Oic-.bet- a.Ala-Dpr-Tic-Dpr-Dpr-Dpr-Dpr-CONH.sub.2 (SEQ ID NO:33) Ac-G-dF-Tic-Oic-GK-Tic-Oic-G dF-Tic-Oic-GK-Tic-KKKK--CONH.sub.2 Ac-GF-Tic-Oic-G-dK-Tic-Oic-GF-Tic-Oic-G-dK-Tic-KKKK--CONH.sub.2 Ac-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-Dpr-Dpr-Dpr-Dpr-CONH.sub.2 (SEQ ID NO:46) (NH.sub.2).sub.4--(K).sub.2--K-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-Oic-G- F-Tic-Oic-GK-Tic-CONH.sub.2 (SEQ ID NO:47) Ac-G-Fpa-Tic-Oic-G-Dpr-Tic-Oic-G-Fpa-Tic-Oic-G-Dpr-Tic-Dpr-Dpr-Dpr-Dpr-CO- NH.sub.2 (SEQ ID NO:48) Ac-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-.beta.A-KKKK--CONH.sub.2 (SEQ ID NO:35) Ac-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-Gaba-KKKK--CONH.sub.- 2 (SEQ ID NO:36) Ac-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-Ahx-KKKK--CONH.sub.2 (SEQ ID NO:37) Ac-GF-Tic-Oic-G-Dab-Tic-Oic-GF-Tic-Oic-G-Dab-Tic-Dab-Dab-Dab-Dab-C- ONH.sub.2 (SEQ ID NO:38) Ac-GF-Tic-Oic-G-Tic-Oic-GF-Tic-Oic-G-Tic-G-KKKK--CONH.sub.2 (SEQ ID NO:49) Ac-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-Dab-Dab-Dab-Dab-CONH.su- b.2 (SEQ ID NO:50) (NH.sub.2).sub.4-(Orn).sub.2-Orn-Tic-Oic-G-Orn-Tic-Oic-GF-Tic-Oic-G-Orn-T- ic-Oic-GF-Tic-Oic-G-Orn-Tic-CONH.sub.2 (SEQ ID NO:51) Thi-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-G-KKKK--CONH.sub.2 (SEQ ID NO:52) Ac-GF-Tic-Oic-GR-Tic-Oic-GF-Tic-Oic-GR-Tic-RRRR--CONH.sub.2 (SEQ ID NO:41) Ac-GF-Tic-Tic-GK-Tic-Tic-GF-Tic-Tic-GK-Tic-KKKK--CONH.sub.2 (SEQ ID NO:42) Ac-GF-Oic-Oic-GK-Oic-Oic-GF-Oic-Oic-GK-Oic-KKKK--CONH.sub.2 (SEQ ID NO:53) Cys-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-G-KKKK--CONH.sub.2 (SEQ ID NO:54) (NH.sub.2).sub.4-(Dpr).sub.2-Dpr-Tic-Oic-G-Dpr-Tic-Oic-GF-Tic-Oic-G-Dpr-T- ic-Oic-GF-Tic-Oic-G-Dpr-Tic-CONH.sub.2 (SEQ ID NO:55) (NH.sub.2).sub.4-(Dab).sub.2-Dab-Tic-Oic-G-Dab-Tic-Oic-GF-Tic-Oic-G-Dab-T- ic-Oic-GF-Tic-Oic-G-Dab-Tic-CONH.sub.2 (SEQ ID NO:56) Ac-G-Nph-Tic-Oic-GK-Tic-Oic-G-Nph-Tic-Oic-GK-Tic-KKKK--CONH.sub.2 (SEQ ID NO:34) Thi-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-KKKK--CONH.sub.2 (SEQ ID NO:39) Ac-GF-Tic-Oic-GW-Tic-Oic-GF-Tic-Oic-GW-Tic-KKKK--CONH.sub.2 (SEQ ID NO:40) Ac-G-Cph-Tic-Oic-GK-Tic-Oic-G-Cph-Tic-Oic-GK-Tic-KKKK--CONH.sub.2(SEQ ID NO:43) Ac-GF-Oic-Tic-GK-Oic-Tic-GF-Oic-Tic-GK-Tic-KKKK--CONH.sub.2(SEQ ID NO:44) Ac-.beta.Ala-Fpa-Tic-Oic-.beta.Ala-K-Tic-Oic-.beta.Ala-Fpa-Tic-Oic- -.beta.Ala-K-Tic-Dpr-Dpr-Dpr-Dpr-CONH.sub.2, (SEQ ID NO:45) Ac-KKKK-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-CONH.sub.2 (SEQ ID NO:1), and Ac-KKKK-GF-Tic-Tic-GK-Tic-Tic-GF-Tic-Tic-GK-Tic-CONH.sub.2 (SEQ ID NO:57).

10. The method of claim 6 wherein the antimicrobial peptide is administered by topical, intravenous, infusion, and oral administration.

11. The method of claim 6, wherein the synthetic antimicrobial peptide analog is administered in conjunction with an antibiotic.

12. The method of claim 6, wherein the antibiotic is selected from the group consisting of ciprofloxacin, carbenicillin, nalidixic acid, amoxicillin, levofloxacin, cefuroxime and erythromycin, imipenem, rifampicin and azithromycin.

13. The method of claim 6, wherein the infection is by Mycobacterium, and the at least one synthetic antimicrobial peptide analog has the formula selected from the group consisting of .SIGMA.-Glycine-O-(Tic-Tic-X-J-Tic-Tic-X--Z).sub.n-Tic-Tic-.PI.-J-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Tic-Tic-X--Z-Tic-Tic-X-J).sub.n-Tic-Tic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-B-(Tic-Tic-X--Z-Tic-Tic-X-J).sub.n-Tic-Tic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Tic-Tic-X-J-Tic-Tic-X--Z).sub.n-Tic-Tic-.PI.-J-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Tic-Tic-X--Z-Tic-Tic-X-J).sub.n-Tic-Tic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-B-(Tic-Tic-X--Z-Tic-Tic-X-J).sub.n-Tic-Tic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Tic-Tic-X-J-Tic-Tic-X--Z).sub.n-Tic-Tic-.PI.-J-Tic-U.s- ub.m--CONH--(CH.sub.2).sub.k--NH.sub.2 .SIGMA.-Glycine-O-(Tic-Tic-X-J-Tic-Tic-X--Z).sub.n-Tic-.PI.-U.sub.m--CONH- .sub.2 .SIGMA.-Glycine-O-(Tic-Tic-X-J-Tic-Tic-X--Z).sub.n-Tic-.PI.-U.sub.- m--CONH.sub.2 .SIGMA.-Glycine-O-(Tic-Tic-X--Z-Tic-Tic-X-J).sub.n-Tic-.PI.-U.sub.m--CONH- .sub.2, .SIGMA.-Glycine-O-(Tic-Tic-X--Z-Tic-Tic-X-J).sub.n-Tic-.PI.-U.sub.- m--CONH.sub.2, .SIGMA.-Glycine-O-(Tic-Tic-Z-Tic-Tic-J).sub.n-Tic-Tic-Z-Tic-U.sub.m--CONH- .sub.2 .SIGMA.-Glycine-B-(Tic-Tic-Z-Tic-tic-J).sub.n-Tic-Tic-Z-Tic-U.sub.- m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Tic-X-J-Oic-Tic-X--Z).sub.n-Oic-Tic-.PI.-J-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Tic-X--Z-Oic-Tic-X-J).sub.n-Oic-Tic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-B-(Oic-Tic-X--Z-Oic-Tic-X-J).sub.n-Oic-Tic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Tic-X-J-Oic-Tic-X--Z).sub.n-Oic-Tic-.PI.-J-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Tic-X--Z-Oic-Tic-X-J).sub.n-Oic-Tic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-B-(Oic-Tic-X--Z-Oic-Tic-X-J).sub.n-Oic-Tic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Tic-X-J-Tic-Tic-X--Z).sub.n-Tic-Tic-.PI.-J-Tic-U.s- ub.m--CONH--(CH.sub.2).sub.k--NH.sub.2 .SIGMA.-Glycine-O-(Oic-Tic-X-J-Oic-Tic-X--Z).sub.n-Tic-.PI.-U.sub.m--CONH- .sub.2 .SIGMA.-Glycine-O-(Oic-Tic-X-J-Oic-Tic-X--Z).sub.n-Tic-.PI.-U.sub.- m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Tic-X--Z-Oic-Tic-X-J).sub.n-Tic-.PI.-U.sub.m--CONH- .sub.2, .SIGMA.-Glycine-O-(Oic-Tic-X--Z-Oic-Tic-X-J).sub.n-Tic-.PI.-U.sub.- m--CONH.sub.2, .SIGMA.-Glycine-O-(Oic-Tic-Z-Oic-Tic-X-J).sub.n-Oic-Tic-Z-Tic-U.sub.m--CO- NH.sub.2 .SIGMA.-Glycine-B-(Oic-Tic-Z-Oic-tic-J).sub.n-Oic-Tic-Z-Tic-U.su- b.m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Oic-X-J-Oic-Oic-X--Z).sub.n-Oic-Oic-.PI.-J-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Oic-X--Z-Oic-Oic-X-J).sub.n-Oic-Oic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-B-(Oic-Oic-X--Z-Oic-Oic-X-J).sub.n-Oic-Oic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Oic-X-J-Oic-Oic-X--Z).sub.n-Oic-Oic-.PI.-J-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Oic-X--Z-Oic-Oic-X-J).sub.n-Oic-Oic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-B-(Oic-Oic-X--Z-Oic-Oic-X-J).sub.n-Oic-Oic-.PI.-Z-Tic-U.s- ub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Oic-X-J-Oic-Oic-X--Z).sub.n-Oic-Oic-.PI.-J-Tic-U.s- ub.m--CONH--(CH.sub.2).sub.k--NH.sub.2 Glycine-O-(Oic-Oic-X-J-Oic-Oic-X--Z).sub.n-Tic-.PI.-U.sub.m--CONH.sub.2 .SIGMA.-Glycine-O-(Oic-Oic-X-J-Oic-Oic-X--Z).sub.n-Tic-.PI.-U.sub.m--CONH- .sub.2 .SIGMA.-Glycine-O-(Oic-Oic-X--Z-Oic-Oic-X-J).sub.n-Tic-.PI.-U.sub.- m--CONH.sub.2, .SIGMA.-Glycine-O-(Oic-Oic-X--Z-Oic-Oic-X-J).sub.n-Tic-.PI.-U.sub.m--CONH- .sub.2, .SIGMA.-Glycine-O-(Oic-Oic-Z-Oic-Oic-J).sub.n-Oic-Oic-Z-Tic-U.sub.- m--CONH.sub.2 .SIGMA.-Glycine-B-(Oic-Oic-Z-Oic-tic-J).sub.n-Oic-Oic-Z-Tic-U.sub.m--CONH- .sub.2 .SIGMA.-U.sub.m-Glycine-O-(Tic-Tic-X-J-Tic-Tic-X--Z).sub.n-Tic-Oic- -.PI.-J-Tic-CONH.sub.2 .SIGMA.-U.sub.m-Glycine-O-(Tic-Tic-X--Z-Tic-Tic-X-J).sub.n-Tic-Oic-.PI.-Z- -Tic-CONH.sub.2 .SIGMA.-U.sub.m-Glycine-B-(Tic-Tic-X--Z-Tic-Tic-X-J).sub.n-Tic-Oic-.PI.-Z- -Tic-CONH.sub.2 .SIGMA.-U.sub.m-Glycine-O-(Tic-Tic-X-J-Tic-Tic-X--Z).sub.n-Tic-Oic-.PI.-J- -Tic-CONH.sub.2 .SIGMA.-U.sub.m-Glycine-O-(Tic-Tic-X--Z-Tic-Tic-X-J).sub.n-Tic-Oic-.PI.-Z- -Tic-CONH.sub.2 .SIGMA.-U.sub.m-Glycine-B-(Tic-Tic-X--Z-Tic-Tic-X-J).sub.n-Tic-Oic-.PI.-Z- -Tic-CONH.sub.2, .SIGMA.-U.sub.m-Glycine-O-(Tic-Tic-X-J-Tic-Tic-X--Z).sub.n-Tic-Oic-.PI.-J- -Tic-CONH--(CH.sub.2).sub.k--NH.sub.2 .SIGMA.-U.sub.m-Glycine-O-(Tic-Tic-X-J-Tic-Tic-X--Z).sub.n-Tic-.PI.-CONH.- sub.2 .SIGMA.-U.sub.m-Glycine-O-(Tic-Tic-X-J-Tic-Tic-X--Z).sub.n-Oic-.PI.- -CONH.sub.2 .SIGMA.-U.sub.m-Glycine-O-(Tic-Tic-X--Z-Tic-Tic-X-J).sub.n-Tic-.PI.-CONH.- sub.2 and .SIGMA.-U.sub.m-Glycine-O-(Tic-Tic-X--Z-Tic-Tic-X-J).sub.n-Oic-.- PI.-CONH.sub.2.

14. The method of claim 13, wherein the at least one synthetic antimicrobial peptide is Ac-GF-Tic-Tic-GK-Tic-Tic-GF-Tic-Tic-GK-Tic-KKKK--CONH.sub.2 (SEQ ID NO:42) or Ac-GF-Oic-Tic-GK-Oic-Tic-GF-Oic-Tic-GK-Tic-KKKK--CONH.sub.2 (SEQ ID NO:44) or Ac-KKKK-GF-Tic-Tic-GK-Tic-Tic-GF-Tic-Tic-GK-Tic-CONH.sub.2 (SEQ ID NO:57), or a combination of these.

15. A method for treating infection by Bacillus anthracis or Yersinia pestis (plague), comprising the step of administering to a mammal suspected of infection by Bacillus anthracis or Yersinia pestis (plague), a pharmaceutically effective amount of one of the synthetic antimicrobial peptides NH.sub.2--KL-Tic-Oic-K-Tic-Oic-F-Tic-Oic-K-Tic-Oic-F-Tic-Oic-K-T- ic-Oic-KR--CONH.sub.2, (SEQ ID NO:9) Ac-GF-Tic-GK-Tic-GF-Tic-GK-Tic-KKKK--CONH.sub.2, (SEQ ID NO:19) Ac-.beta.Ala-F-Tic-Oic-.beta.Ala-K-Tic-Oic-.beta.Ala-F-Tic-Oic-.beta.Ala-- K-Tic-KKKK--CONH.sub.2, SEQ ID NO:23) Ac-G-Fpa-Tic-Oic-GK-Tic-Oic-G-Fpa-Tic-Oic-GK-Tic-KKKK--CONH.sub.2, (SEQ ID NO:29) Ac-GF-Tic-Oic-G-Orn-Tic-Oic-GF-Tic-Oic-G-Orn-Tic-Orn-Orn-Orn-Or- n-CONH.sub.2, (SEQ ID NO:30) Ac-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-.beta.A-KKKK--CONH.sub.2, (SEQ ID NO:35) Ac-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-Gaba-KKKK--CONH.sub.- 2, (SEQ ID NO:36) Ac-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-Ahx-KKKK--CONH.sub.2, (SEQ ID NO:37) Ac-GF-Tic-Oic-G-Dab-Tic-Oic-GF-Tic-Oic-G-Dab-Tic-Dab-Dab-Dab-Dab-C- ONH.sub.2, (SEQ ID NO:38) Thi-GF-Tic-Oic-GK-Tic-Oic-GF-Tic-Oic-GK-Tic-KKKK--CONH.sub.2, (SEQ ID NO:39) Ac-GF-Tic-Oic-GW-Tic-Oic-GF-Tic-Oic-GW-Tic-KKKK--CONH.sub.2, (SEQ ID NO:40) Ac-GF-Tic-Tic-GK-Tic-Tic-GF-Tic-Tic-GK-Tic-KKKK--CONH.sub.2, (SEQ ID NO:42) Ac-G-Cph-Tic-Oic-GK-Tic-Oic-G-Cph-Tic-Oic-GK-Tic-KKKK--CONH.sub.2, (SEQ ID NO:43) or a combination of these.

16. The method of claim 15, wherein the antimicrobial peptide exhibits less hemolytic activity than naturally occurring non-selective antimicrobial peptides.

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