Novel inhibitors for PRMT1 discovered by high-throughput screening using activity-based fluorescence polarization.

Novel inhibitors for PRMT1 discovered by high-throughput screening using activity-based fluorescence polarization.
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DOI:
10.1021/cb300024c
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发表时间:
2012-07-20
影响因子:
4
通讯作者:
Mowen, Kerri A.
Mowen, Kerri A.
中科院分区:
生物学2区
文献类型:
--
作者:
Dillon, Myles B. C.;Bachovchin, Daniel A.;Brown, Steven J.;Finn, M. G.;Rosen, Hugh;Cravatt, Benjamin F.;Mowen, Kerri A.

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蛋白质精氨酸甲基转移酶(PRMTs)以S-腺苷甲硫氨酸(SAM)为甲基供体催化精氨酸的翻译后甲基化。PRMT家族广泛表达,并参与生物学功能,如RNA剪接、转录控制、信号转导和DNA修复。因此,针对PRMT的特异性抑制剂具有潜在的重要研究和治疗价值。特别地,PRMT 1负责>85%的精氨酸甲基转移酶活性,但目前可用的PRMT 1抑制剂缺乏特异性、功效和生物利用度。为了解决这一限制,我们开发了一种针对PRMT 1的高通量筛选试验,该试验利用活性位点内的高反应性半胱氨酸,这是几乎所有其他PRMT所缺乏的。该测定,它监测的动力学的荧光偏振信号增加后PRMT 1标记的罗丹明含半胱氨酸反应性探针,成功地确定了两种新的抑制剂选择性PRMT 1超过其他SAM依赖性甲基转移酶。
Protein Arginine Methyltransferases (PRMTs) catalyze the posttranslational methylation of arginine using S–adenosyl–methionine (SAM) as a methyl–donor. The PRMT family is widely expressed and has been implicated in biological functions such as RNA splicing, transcriptional control, signal transduction, and DNA repair. Therefore, specific inhibitors of individual PRMTs have potentially significant research and therapeutic value. In particular, PRMT1 is responsible for >85% of arginine methyltransferase activity, but currently available inhibitors of PRMT1 lack specificity, efficacy, and bioavailability. To address this limitation, we developed a high–throughput screening assay for PRMT1 that utilizes a hyper–reactive cysteine within the active–site, which is lacking in almost all other PRMTs. This assay, which monitors the kinetics of the fluorescence polarization signal increase upon PRMT1 labeling by a rhodamine–containing cysteine–reactive probe, successfully identified two novel inhibitors selective for PRMT1 over other SAM–dependent methyltransferases.
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