Ruder T, Ali SA, Ormerod K, Brust A, Roymanchadi ML, Ventura S, Undheim EAB, Jackson TNW, Mercier AJ, King GF, Alewood PF, Fry BG. Functional characterization on invertebrate and vertebrate tissues of tachykinin peptides from octopus venoms.
Peptides 2013;
47:71-6. [PMID:
23850991 DOI:
10.1016/j.peptides.2013.07.002]
[Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2013] [Revised: 07/01/2013] [Accepted: 07/02/2013] [Indexed: 10/26/2022]
Abstract
It has been previously shown that octopus venoms contain novel tachykinin peptides that despite being isolated from an invertebrate, contain the motifs characteristic of vertebrate tachykinin peptides rather than being more like conventional invertebrate tachykinin peptides. Therefore, in this study we examined the effect of three variants of octopus venom tachykinin peptides on invertebrate and vertebrate tissues. While there were differential potencies between the three peptides, their relative effects were uniquely consistent between invertebrate and vertebrae tissue assays. The most potent form (OCT-TK-III) was not only the most anionically charged but also was the most structurally stable. These results not only reveal that the interaction of tachykinin peptides is more complex than previous structure-function theories envisioned, but also reinforce the fundamental premise that animal venoms are rich resources of novel bioactive molecules, which are useful investigational ligands and some of which may be useful as lead compounds for drug design and development.
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