Domingues Marco M, Santiago Patrícia S, Castanho Miguel A R B, Santos Nuno C
Instituto de Medicina Molecular, Faculdade de Medicina da Universidade de Lisboa, Av. Prof. Egas Moniz, 1649-028, Lisboa, Portugal.
J Pept Sci. 2008 Apr;14(4):394-400. doi: 10.1002/psc.1007.
Highly charged peptides are important components of the immune system and belong to an important family of antibiotics. Although their therapeutic activity is known, most of the molecular level mechanisms are controversial. A wide variety of different approaches are usually applied to understand their mechanisms, but light scattering techniques are frequently overlooked. Yet, light scattering is a noninvasive technique that allows insights both on the peptide mechanism of action as well as on the development of new antibiotics. Dynamic light scattering (DLS) and static light scattering (SLS) are used to measure the aggregation process of lipid vesicles upon addition of peptides and molecular properties (shape, molecular weight). The high charge of these peptides allows electrostatic attraction toward charged lipid vesicles, which is studied by zeta potential (zeta-potential) measurements.
高电荷肽是免疫系统的重要组成部分，属于一类重要的抗生素。尽管它们的治疗活性已为人所知，但大多数分子水平的机制仍存在争议。通常采用各种各样的不同方法来理解它们的机制，但光散射技术常常被忽视。然而，光散射是一种非侵入性技术，既能深入了解肽的作用机制，也有助于开发新的抗生素。动态光散射（DLS）和静态光散射（SLS）用于测量添加肽后脂质囊泡的聚集过程以及分子特性（形状、分子量）。这些肽的高电荷使其能够与带电荷的脂质囊泡产生静电吸引，这可通过zeta电位测量来研究。
