Purification and properties of laticeptin, an antimicrobial peptide from skin secretions of the South American frog Leptodactylus laticeps.
Norepinephrine-stimulated skin secretions from the Sante Fe frog Leptodactylus laticeps contained high concentrations of a peptide, termed laticeptin, with the primary structure Gly-Val-Val-Asp-Ile-Leu-Lys-Gly-Ala-Ala-Lys-Asp-Leu-Ala-Gly-His-Leu-Ala-Thr-Lys-Val-Met-Asn-Lys-Leu.NH(2). Laticeptin inhibited the growth of selected Gram-negative bacteria but the lack of activity against Gram-positive bacteria and the very low hemolytic activity is probably a consequence of the weak amphipathicity of the peptide in its alpha-helical conformation.
Conlon
J Michael
JM
Department of Biochemistry, Faculty of Medicine and Health Sciences, United Arab Emirates University, 17666 Al-Ain, United Arab Emirates. jmconlon@uaeu.ac.ae
Al-Ghaferi
Nadia
N
Abraham
Bency
B
Sonnevend
Agnes
A
King
Jay D
JD
Nielsen
Per F
PF
D000595:Amino Acid Sequence; D000818:Animals; D023181:Antimicrobial Cationic Peptides / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D001001:Anura; D004912:Erythrocytes / Q000187:drug effects; D006090:Gram-Negative Bacteria / Q000187:drug effects; D006461:Hemolysis; D006801:Humans; D008297:Male; D008826:Microbial Sensitivity Tests; D008969:Molecular Sequence Data; D012867:Skin / Q000378:metabolism*
D023181:Antimicrobial Cationic Peptides; C511502:laticeptin, Leptodactylus laticeps