Provided are a modified IL-7 polypeptide and a fusion protein containing the modified IL-7 polypeptide. The fusion protein of the modified IL-7 includes: a first domain containing an interleukin-7 polypeptide; a second domain containing an oligopeptide having 1 to 10 amino acid residues (with proviso that the second domain excludes the oligopeptide consisting of methionine and/or glycine); and (c) a third domain which prolongs the half-life of the IL-7 fusion protein. The modified IL-7 polypeptide is composed of the (a) first domain and the (b) second domain. The modified IL-7 polypeptide and the fusion protein are expressed in a higher yield than the wild-type IL-7 and shows increased stability.
提供的是经修改的IL-7
多肽和含有经修改的IL-7
多肽的融合蛋白。经修改的IL-7的融合蛋白包括:包含白细胞介素-7
多肽的第一结构域;包含具有1至10个
氨基酸残基的寡肽的第二结构域(但第二结构域不包括由蛋
氨酸和/或甘
氨酸组成的寡肽);以及延长IL-7融合蛋白半衰期的第三结构域。经修改的IL-7
多肽由第一结构域和第二结构域组成。经修改的IL-7
多肽和融合蛋白的表达产量高于野生型IL-7,并显示出增加的稳定性。