Development of small molecule inhibitors and probes of human SUMO deconjugating proteases.

Development of small molecule inhibitors and probes of human SUMO deconjugating proteases.
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DOI:
10.1016/j.chembiol.2011.05.008
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发表时间:
2011-06-24
影响因子:
--
通讯作者:
Bogyo M
Bogyo M
中科院分区:
生物1区
文献类型:
--
作者:
Albrow VE;Ponder EL;Fasci D;Békés M;Deu E;Salvesen GS;Bogyo M

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Sentrin特异性蛋白酶(SENP)负责从靶蛋白激活和去缀合SUMO(小泛素样调节剂)。由于缺乏可用于阻断SUMO从底物上去除的试剂,研究这种翻译后修饰仍然很困难。在这里,我们描述了识别小分子SENP抑制剂和活性位点探针含有氮杂环氧化物和酰氧基甲基酮(AOMK)反应基团。两类化合物都是hSENP 1、2、5和7的有效抑制剂,而只有AOMK有效抑制hSENP 6。与先前报道的肽乙烯基砜不同,这些化合物共价标记了多个重组表达的SENP蛋白酶的活性位点半胱氨酸,并且当添加到复杂的蛋白质混合物中时,AOMK探针显示出这些SENP的选择性标记。因此,AOMK化合物代表了研究SUMO去缀合过程的有前途的新试剂。
Sentrin specific proteases (SENPs) are responsible for activating and deconjugating SUMO (Small Ubiquitin like MOdifier) from target proteins. It remains difficult to study this post-translational modification due to the lack of reagents that can be used to block the removal of SUMO from substrates. Here we describe the identification of small molecule SENP inhibitors and active site probes containing aza-epoxide and acyloxymethyl ketone (AOMK) reactive groups. Both classes of compounds are effective inhibitors of hSENPs 1,2, 5 and 7 while only the AOMKs efficiently inhibit hSENP6. Unlike previous reported peptide vinyl sulfones, these compounds covalently labeled the active site cysteine of multiple recombinantly expressed SENP proteases and the AOMK probe showed selective labeling of these SENPs when added to complex protein mixtures. The AOMK compound therefore represent promising new reagents to study the process of SUMO deconjugation.
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