Decoralin, a novel linear cationic á-helical peptide from the venom of the solitary eumenine wasp Oreumenes decoratus
Peptides
; 28(12): 2320-2327, 2007.
Article
in English
| Sec. Est. Saúde SP, SESSP-IBPROD, Sec. Est. Saúde SP, SESSP-IBACERVO
| ID: biblio-1065271
Responsible library:
BR78.1
Localization: BR78.1
ABSTRACT
A novel peptide, decoralin, was isolated from the venom of the solitary eumenine wasp Oreumenes decoratus. Its sequence, Ser-Leu-Leu-Ser-Leu-Ile-Arg-Lys-Leu-Ile-Thr, was determined by Edman degradation and corroborated by solid-phase synthesis. This sequence has the characteristic features of linear cationic á-helical peptides; rich in hydrophobic and basic amino acids with no disulfide bond, and accordingly, it can be predicted to adopt an amphipathic á-helix secondary structure. In fact, the CD spectra of decoralin in the presence of TFE or SDS showed a high á-helical conformation content. In a biological evaluation, decoralin exhibited a significant broad-spectrum antimicrobial activity, and moderate mast cell degranulation and leishmanicidal activities, but showed virtually no hemolytic activity. A synthetic analog with C-terminal amidation showed a much more potent activity in all the biological assays.
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Collection:
National databases
/
Brazil
Database:
Sec. Est. Saúde SP
/
SESSP-IBACERVO
/
SESSP-IBPROD
Main subject:
Wasps
/
Insect Bites and Stings
Type of study:
Prognostic study
Limits:
Animals
Language:
English
Journal:
Peptides
Year:
2007
Document type:
Article
Institution/Affiliation country:
Instituto Butantan/BR