Mass Spectrometric Identification of Antimicrobial Peptides from Medicinal Seeds.

Mass Spectrometric Identification of Antimicrobial Peptides from Medicinal Seeds.
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DOI:
10.3390/molecules26237304
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发表时间:
2021-12-01
期刊:
Molecules (Basel, Switzerland)
影响因子:
--
通讯作者:
Hicks LM
Hicks LM
中科院分区:
其他
文献类型:
--
作者:
Moyer TB;Brechbill AM;Hicks LM

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传统药用植物含有多种具有生物活性的天然产物,包括富含半胱氨酸的抗菌肽(AMP)。富含Cys的AMP通常通过多个二硫键交联,这增加了它们对化学和酶降解的抗性。然而,这类分子相对来说还未被充分研究。在此,计算机模拟分析预测了来自三种可食用传统药用植物的每种80-100个富含Cys的AMP:亚麻(Linum usitatissimum)(亚麻)、红三叶草(Trifolium pratense)(红三叶草)和芝麻(Sesamum indicum)(芝麻)。种子肽提取物的自下而上的蛋白质组学分析揭示了每个物种翻译3-10个富含Cys的AMP的直接证据,包括脂质转移蛋白、防御素、α-发夹蛋白和蛇蛋白。抗菌筛选显示的阴性活性突出了采用多管齐下的方法发现AMP的重要性。此外,这项研究表明,亚麻,红三叶草,芝麻是有前途的来源,进一步AMP的发现和表征。
Traditional medicinal plants contain a variety of bioactive natural products including cysteine-rich (Cys-rich) antimicrobial peptides (AMPs). Cys-rich AMPs are often crosslinked by multiple disulfide bonds which increase their resistance to chemical and enzymatic degradation. However, this class of molecules is relatively underexplored. Herein, in silico analysis predicted 80–100 Cys-rich AMPs per species from three edible traditional medicinal plants: Linum usitatissimum (flax), Trifolium pratense (red clover), and Sesamum indicum (sesame). Bottom-up proteomic analysis of seed peptide extracts revealed direct evidence for the translation of 3–10 Cys-rich AMPs per species, including lipid transfer proteins, defensins, α-hairpinins, and snakins. Negative activity revealed by antibacterial screening highlights the importance of employing a multi-pronged approach for AMP discovery. Further, this study demonstrates that flax, red clover, and sesame are promising sources for further AMP discovery and characterization.
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