| Description | Indolicidin is comprised of 13 amino acids, 5 of which are tryptophan residues, and the carboxylterminal arginine is carboxamidated. Indolicidin has the highest tryptophan content of any known protein. |
| In vitro | Indolicidin 是从牛中性粒细胞的细胞质颗粒中提炼出的强效抗菌多肽。它由13个氨基酸组成,其中5个为色氨酸残基,且羧基末端的精氨酸经过羧酰胺化。Indolicidin 的色氨酸含量是所有已知蛋白质中最高的。多个色氨酸残基在这种独特的抗生肽的功能中可能起着重要作用。Indolicidin 是一种具有体外杀菌活性的十三肽酰胺,其活性可与最活跃的防御素或白细胞素肽相媲美[1]。Indolicidin 高亲和力地结合纯化的表面脂多糖并使大肠杆菌的外膜对小型疏水分子1-N-苯基萘胺(Mr 200)渗透,这一结果与 Indolicidin 通过自促进吸收途径穿越外膜相一致。Indolicidin 羧基末端的甲酯化增强了其对革兰氏阴性和阳性细菌的活性。在革兰氏阴性细菌中,这与脂多糖的增强结合和外膜的增加渗透性有关。在大肠杆菌中通过膜渗透暴露细胞质β-半乳糖苷酶的方法表明,细胞质膜是Indolicidin作用的位点[2]。 |
| molecular weight | 1906.28 |
| Molecular formula | C100H132N26O13 |
| CAS | 140896-21-5 |
| Storage | keep away from moisture | Powder: -20°C for 3 years | In solvent: -80°C for 1 year |
| Solubility | DMSO: 10mM |
| References | 1. Selsted ME, et al. Indolicidin, a novel bactericidal tridecapeptide amide from neutrophils. J Biol Chem. 1992 Mar 5;267(7):4292-5. |