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Somuncurins: Bioactive Peptides from the Skin of the Endangered Endemic Patagonian Frog Pleurodema somuncurense.
Journal of Natural Products ( IF 3.3 ) Pub Date : 2020-03-05 , DOI: 10.1021/acs.jnatprod.9b00906
Natalia L Cancelarich 1 , Natalia Wilke 2, 3 , Marı A L Fanani 2, 3 , Daniel C Moreira 4 , Luis O Pérez 5 , Eder Alves Barbosa 6, 7 , Alexandra Plácido 8, 9 , Renato Socodato 9 , Camila C Portugal 9 , João B Relvas 9 , Beatriz G de la Torre 10 , Fernando Albericio 10, 11 , Néstor G Basso 12 , José R Leite 4 , Mariela M Marani 1
Affiliation  

The skin glands of amphibian species hold a major component of their innate immunity, namely a unique set of antimicrobial peptides (AMPs). Although most of them have common characteristics, differences in AMP sequences allow a huge repertoire of biological activity with varying degrees of efficacy. We present the first study of the AMPs from Pleurodema somuncurence (Anura: Leptodactylidae: Leiuperinae). Among the 11 identified mature peptides, three presented antimicrobial activity. Somuncurin-1 (FIIWPLRYRK), somuncurin-2 (FILKRSYPQYY), and thaulin-3 (NLVGSLLGGILKK) inhibited Escherichia coli growth. Somuncurin-1 also showed antimicrobial activity against Staphylococcus aureus. Biophysical membrane model studies revealed that this peptide had a greater permeation effect in prokaryotic-like membranes and capacity to restructure liposomes, suggesting fusogenic activity, which could lead to cell aggregation and disruption of cell morphology. This study contributes to the characterization of peptides with new sequences to enrich the databases for the design of therapeutic agents. Furthermore, it highlights the importance of investing in nature conservation and the power of genetic description as a strategy to identify new compounds.

中文翻译:

Somuncurins:来自濒临灭绝的地方性巴塔哥尼亚蛙Pleurodema somuncurense皮肤的生物活性肽。

两栖动物的皮肤腺体拥有其固有免疫力的主要组成部分,即独特的一组抗菌肽(AMP)。尽管它们中的大多数具有共同的特征,但是AMP序列的差异允许具有不同程度的功效的大量生物学活性。我们提出了对Pleurodema somuncurence(Anura:Leptodactylidae:Leiuperinae)AMPs的首次研究。在确定的11种成熟肽中,有3种具有抗菌活性。Somuncurin-1(FIIWPLRYRK),somuncurin-2(FILKRSYPQYY)和thaulin-3(NLVGSLLGGILKK)抑制了大肠杆菌的生长。Somuncurin-1还显示出对金黄色葡萄球菌的抗菌活性。生物物理膜模型研究表明,该肽在原核样膜中具有更大的渗透作用,并具有重组脂质体的能力,提示融合活性,这可能导致细胞聚集和细胞形态破坏。这项研究有助于用新序列表征肽,以丰富用于治疗剂设计的数据库。此外,它强调了投资于自然保护的重要性以及基因描述的力量作为识别新化合物的策略。
更新日期:2020-03-05
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