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    • 13. 发明授权
    • Methods and compositions for inhibiting farnesyl transferase enzyme
    • 抑制法呢基转移酶的方法和组合物
    • US06936431B2
    • 2005-08-30
    • US10083894
    • 2002-02-27
    • Michael S. BrownJoseph L. GoldsteinYuval Reiss
    • Michael S. BrownJoseph L. GoldsteinYuval Reiss
    • A61K38/00C07K5/103C07K7/06C07K14/82C12N9/10C12Q1/48
    • C07K7/06A61K38/00C07K5/1013C07K14/82C12N9/1085Y10S435/815
    • Disclosed are methods and compositions for the identification, characterization and inhibition of farnesyl protein transferases, enzymes involved in the farnesylation of various cellular proteins, including cancer related ras proteins such as p21ras. One farnesyl protein transferase which is disclosed herein exhibits a molecular weight of between about 70,000 and about 100,000 upon gel exclusion chromatography. The enzyme appears to comprise one or two subunits of approximately 50 kDa each. Methods are disclosed for assay and purification of the enzyme, as well as procedures for using the purified enzyme in screening protocols for the identification of possible anticancer agents which inhibit the enzyme and thereby prevent expression of proteins such as p21ras. Also disclosed is a families of compounds which act either as false substrates for the enzyme or as pure inhibitors and can therefore be employed for inhibition of the enzyme. The most potent inhibitors are ones in which phenylalanine occurs at the third position of a tetrapeptide whose amino terminus is cysteine.
    • 公开了用于鉴定,表征和抑制法呢基蛋白转移酶的方法和组合物,涉及各种细胞蛋白质的法呢基化的酶,包括癌症相关的ras蛋白如p21Ras。 本文公开的一种法呢基蛋白转移酶在凝胶排阻色谱上显示约70,000至约100,000的分子量。 该酶似乎包含一个或两个约50kDa的亚单位。 公开了用于酶的测定和纯化的方法,以及在筛选方案中使用纯化酶鉴定可能的抗癌剂的方法,所述抗癌剂抑制酶,从而阻止蛋白质如p21的表达 >。 还公开了作为酶的假底物或纯抑制剂的化合物家族,因此可用于抑制酶。 最有效的抑制剂是其氨基末端是半胱氨酸的四肽的第三位发生苯丙氨酸的抑制剂。
    • 15. 发明授权
    • Sterol Regulatory Elements
    • 甾醇调节元素
    • US5256545A
    • 1993-10-26
    • US425852
    • 1989-10-20
    • Michael S. BrownJoseph L. GoldsteinDavid W. RussellThomas C. Sudhof
    • Michael S. BrownJoseph L. GoldsteinDavid W. RussellThomas C. Sudhof
    • C12N15/85C12N15/11C12N5/10C12N15/63
    • C12N15/85
    • Disclosed are discrete functionally translocatable DNA segments, termed Sterol Regulatory Elements (SREs), which are fused to heterologous structural genes to provide sterol regulatory capability to the thus formed hybrid gene. The hybrid genes respond to sterols by decreasing the production of messenger RNA. The SRE segments contain as their primary functional nucleotide sequence, a 16 bp sequence referred to as direct repeat 2, isolated from the 5' regions of the human LDL receptor gene. DNA segments which include this 16 nucleotide long sequence similarly confer sterol regulatory capability to previously known promoters such as the HSV TK promoter. Also disclosed are discrete sequences which confer positive transcription promotion to heterologous structural genes and promoters without conferring sterol responsivity. Methods are disclosed for employing these genetic control elements in a myriad of embodiments which provide for a fine-tune control of heterologous genes. Methods are also disclosed for employing the SRE in a screening assay for drugs capable of stimulating the cell to synthesize LDL receptors.
    • 公开了离散的功能可转位DNA片段,称为Sterol调节元件(SRE),其与异源结构基因融合以向由此形成的杂合基因提供固醇调节能力。 杂交基因通过降低信使RNA的产生来响应甾醇。 SRE片段包含从人LDL受体基因的5'区域分离的作为其主要功能核苷酸序列的16bp序列,称为直接重复序列2。 包括该16个核苷酸长序列的DNA片段类似地赋予先前已知的启动子如HSV TK启动子的甾醇调节能力。 还公开了对异源结构基因和启动子赋予阳性转录促进剂而不赋予固醇反应性的离散序列。 公开了在无数个实施例中使用这些遗传控制元件的方法,其提供异源基因的微调控制。 还公开了在能够刺激细胞合成LDL受体的药物的筛选测定中使用SRE的方法。