Identification and Functional Analysis of Novel Bradykinin-Related Peptides (BRPs) from Skin Secretions of Five Asian Frogs
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In recent decades, various types of bioactive substances have been identified from amphibian skin and its secretions. Bradykinin-related peptides (BRPs) are among these compounds that make up the host defence system of amphibians. In the present study, we identified six novel BRPs, amolopkinin-GN1, amolopkinin-RK1, amolopkinin-TR1, amolopkinin-LF1, ranakinin-MS1, and ranakinin-MS2, from five East Asian amphibians, Amolops granulosus, Amolops ricketti, Amolops torrentis, Amolops lifanensis, and Hylarana maosonensis. This is the first report on BRPs in the skin of these species. Physiological assays reveal that these peptides have a contractive effect on the smooth muscle of rat ileum.
KeywordsAmphibian Skin Bradykinin-related peptides Host defence
The study was supported by the Natural Science Foundation of Educational Committee of Hebei Province of China (Nos. QN2016129), Natural Science Foundation of Hebei Province of China (Nos. C2016205244), and National Natural Science Foundation of China (Nos. 31200309).
Compliance with Ethical Standards
Conflict of interest
All authors declare that they have no conflicts of interest.
This article does not contain any studies with human participants performed by any of the authors.
- 15.Zhou J, Bjourson AJ, Coulter DJ, Chen T, Shaw C, O’Rourke M, Hirst DG et al (2007) Bradykinin-related peptides, including a novel structural variant, (Val1)-bradykinin, from the skin secretion of Guenther’s frog, Hylarana guentheri and their molecular precursors. Peptides 28:781–789CrossRefPubMedGoogle Scholar
- 18.Takagaki Y, Kitamura N, Nakanishi S (1985) Cloning and sequence analysis of cDNAs for human high molecular weight and low molecular weight prekininogens. Primary structures of two human prekininogens. J Biol Chem 14:8601–8609Google Scholar
- 28.Zhou X, Wang L, Zhou M, Chen T, Ding A, Rao P, Walker B et al (2009) Amolopkinins W1 and W2–novel bradykinin-related peptides (BRPs) from the skin of the Chinese torrent frog, Amolops wuyiensis: antagonists of bradykinin-induced smooth muscle contraction of the rat ileum. Peptides 30:893–900CrossRefPubMedGoogle Scholar