Hofmann K, Kiso Y
Proc Natl Acad Sci U S A. 1976 Oct;73(10):3516-8. doi: 10.1073/pnas.73.10.3516.
A novel approach to affinity columns is described that is based on the high avidity of biotinylated molecules for avidin attached to solid supports. Biocytin amide [Nepsilon-(+)-biotinyllysine amide] was coupled to the COOH-terminal carboxyl group of corticotropin(1-24) [ACTH(1-24)] to form [biocytin25]ACTH(1-25) amide. The ability of this peptide to stimulate steroidogenesis of bovine adrenocortical cells was within experimental error identical to that of ACTH(1-24). The peptide also binds to avidin and avidin-Sepharose, forming stable complexes. Thus, with biotin as the anchor, the adrenocorticotropically active segment of the ACTH molecule was attached to a solid support in a targeted manner. The general applicability of this principle for the attachment of peptides and proteins to solid supports is discussed.
描述了一种基于生物素化分子对附着在固体支持物上的抗生物素蛋白具有高亲和力的新型亲和柱方法。生物胞素酰胺[Nε-(+)-生物素基赖氨酸酰胺]与促肾上腺皮质激素(1-24)[促肾上腺皮质激素(1-24)]的COOH末端羧基偶联,形成[生物胞素25]促肾上腺皮质激素(1-25)酰胺。该肽刺激牛肾上腺皮质细胞类固醇生成的能力在实验误差范围内与促肾上腺皮质激素(1-24)相同。该肽还与抗生物素蛋白和抗生物素蛋白-琼脂糖结合,形成稳定的复合物。因此,以生物素为锚,促肾上腺皮质激素分子的促肾上腺皮质活性片段以靶向方式附着在固体支持物上。讨论了该原理在将肽和蛋白质附着到固体支持物上的一般适用性。