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Histamine-releasing and antimicrobial peptides from the skin secretions of the Dusky Gopher frog, Rana sevosa

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Graham, C, Richter, SC, McClean, Stephen, O'Kane, E, Flatt, Peter and Shaw, C (2006) Histamine-releasing and antimicrobial peptides from the skin secretions of the Dusky Gopher frog, Rana sevosa. PEPTIDES, 27 (6). pp. 1313-1319. [Journal article]

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DOI: 10.1016/j.peptides.2005.11.021

Abstract

Seven novel peptides were isolated from the skin secretions of the North American dusky gopher frog, Rana sevosa, on the basis of antimicrobial activity and histamine release from rat peritoneal mast cells. The peptides were purified to homogeneity using HPLC and characterized by electrospray ion-trap mass spectrometry, MALDI-TOF mass spectrometry and Edman sequencing. Bioinformatic analysis of primary structures revealed that the novel peptides could be assigned to four established families of ranid frog antimicrobial peptides, namely esculentin-1, esculentin-2, brevinin-1 and ranatuerin-2. The peptides were named in accordance with accepted terminology as ranatuerin 2SEa, etc., reflecting the peptide family name, the species of origin (SE for sevosa) and the isotype (a). Of major interest was the fact that brevinin 1SE displayed significant structural similarity to ponericin W5, an antibacterial venom peptide from the ant; Pachyconyla goeldii. This is a further example of amphibian skin defensive peptides showing striking structural similarities to peptides from insects. These data may shed some light on the functional biological relevance of defensive peptides that possess both antimicrobial and histamine-releasing activities. (c) 2005 Elsevier Inc. All rights reserved.

Item Type:Journal article
Faculties and Schools:Faculty of Life and Health Sciences
Faculty of Life and Health Sciences > School of Biomedical Sciences
Research Institutes and Groups:Biomedical Sciences Research Institute
Biomedical Sciences Research Institute > Diabetes
Biomedical Sciences Research Institute > Pharmaceutical Science and Practice
ID Code:2977
Deposited By:Professor Peter Flatt
Deposited On:18 Dec 2009 09:35
Last Modified:05 Oct 2010 12:17

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