Department of Chemistry, Texas A&M University, College Station, TX 77843, USA.
Biochemistry. 2012 Jul 3;51(26):5232-4. doi: 10.1021/bi300535a. Epub 2012 Jun 19.
Using an evolved pyrrolysyl-tRNA synthetase-tRNA(Pyl) pair, a Se-alkylselenocysteine was genetically incorporated into histone H3 with a high protein expression yield. Quantitative oxidative elimination of Se-alkylselenocysteine followed by Michael addition reactions with various thiol nucleophiles generated biologically active mimics of H3 with posttranslational modifications including lysine methylation, lysine acetylation, and serine phosphorylation.
利用进化的吡咯赖氨酰-tRNA 合成酶-tRNA(Pyl)对,将 Se- 烷硒代半胱氨酸遗传掺入组蛋白 H3 中,实现了高蛋白质表达产量。Se- 烷硒代半胱氨酸的定量氧化消除,随后与各种巯基亲核试剂进行迈克尔加成反应,生成了具有翻译后修饰的 H3 的生物活性模拟物,包括赖氨酸甲基化、赖氨酸乙酰化和丝氨酸磷酸化。