作者:Takuya Shiraishi、Shojiro Kadono、Masayuki Haramura、Hirofumi Kodama、Yoshiyuki Ono、Hitoshi Iikura、Tohru Esaki、Takaki Koga、Kunihiro Hattori、Yoshiaki Watanabe、Akihisa Sakamoto、Kazutaka Yoshihashi、Takehisa Kitazawa、Keiko Esaki、Masateru Ohta、Haruhiko Sato、Toshiro Kozono
DOI:10.1248/cpb.58.38
日期:——
Selective factor VIIa-tissue factor complex (FVIIa/TF) inhibition is regarded as a promising target for developing new anticoagulant drugs. In previous reports, we described a S3 subsite found in the X-ray crystal structure of compound 2 that bound to FVIIa/soluble tissue factor (sTF). Based on the X-ray crystal structure information and with the aim of improving the inhibition activity for FVIIa/TF and selectivity against other serine proteases, we synthesized derivatives by introducing substituents at position 5 of the indole ring of compound 2. Among them, compound 16 showed high selectivity against other serine proteases. Contrary to our expectations, compound 16 did not occupy the S3-subsite; X-ray structure analysis revealed that compound 16 improved selectivity by forming hydrogen bonds with Gln217, Thr99 and Asn100.
选择性因子VIIa-组织因子复合物(FVIIa/TF)抑制被认为是开发新抗凝药物的一个有前景的靶点。在之前的报告中,我们描述了在化合物2的X射线晶体结构中发现的S3亚位点,该亚位点与FVIIa/可溶性组织因子(sTF)结合。基于X射线晶体结构信息,并旨在提高对FVIIa/TF的抑制活性及对其他丝氨酸蛋白酶的选择性,我们通过在化合物2的吲哚环的5位引入取代基合成了衍生物。其中,化合物16对其他丝氨酸蛋白酶显示了较高的选择性。与我们的预期相反,化合物16并未占据S3亚位点;X射线结构分析揭示,化合物16通过与Gln217、Thr99和Asn100形成氢键,提高了选择性。