Disclosed is a substantially pure polypeptide having a specific amino acid sequence containing (a) an amino acid residue selected from the group consisting of Asp, Glu and Gla wherein Gla represents a γ-carboxyglutamic acid residue or (b) a peptide or polypeptide residue consisting of at least two amino acid residues selected from Asp, Glu and Gla, wherein the above-mentioned at least two amino acid residues are all the same or combinations of the Asp, Glu and Gla. The polypeptide is capable of interacting with thrombin to form a binding therebetween, thereby exhibiting an activity to inhibit the blood coagulation and platelet aggregation by thrombin and/or an activity to promote the thrombin-catalyzed activation of protein C. This novel polypeptide has a low molecular weight so that it is suitable for oral or nasal administration.
本发明公开了一种具有特定
氨基酸序列的基本纯
多肽,该
氨基酸序列含有(a)选自Asp、Glu和Gla组成的组的
氨基酸残基,其中Gla代表γ-羧基谷
氨酸残基;或(b)由至少两个选自Asp、Glu和Gla的
氨基酸残基组成的肽或
多肽残基,其中上述至少两个
氨基酸残基均为相同的或Asp、Glu和Gla的组合。这种
多肽能够与凝血酶相互作用,在两者之间形成结合,从而表现出抑制凝血酶的血液凝固和血小板聚集的活性和/或促进凝血酶催化的蛋白 C 活化的活性。