烯烃交叉复分解 (CM) 是一种用于修饰含烯烃蛋白质的可行反应。尽管蛋白质中的烯丙基硫醚或硒化物侧链基序可以极大地提高 CM 反应的速率,但迄今为止尚未报道将它们的位点选择性遗传掺入蛋白质的有效方法。在这里,通过对含烯烃的非天然氨基酸代谢掺入的系统评估,我们发现了 S-烯丙基同型半胱氨酸 (Ahc) 作为一种可遗传编码的 Met 类似物,它不仅由翻译细胞机器加工,而且是一种特殊的 CM 底物残基。蛋白质。通过这种方式,Ahc 用于在 Met 营养缺陷型大肠杆菌菌株中进行有效的 Met 密码子重新分配。大肠杆菌(B834(DE3))以及人类细胞中蛋白质的代谢标记,并且在几种代表性蛋白质中对CM具有反应性。这扩展了 CM 在工具包中的使用,用于蛋白质的“标记和修改”功能化。
Nucleoside or nucleotides having novel unnatural bases and utilization of the same
申请人:Hirao Ichiro
公开号:US20060263771A1
公开(公告)日:2006-11-23
The object of the present invention is to provide a nucleoside or nucleotide having an unnatural base. The nucleoside or nucleotide of the present invention has a 5-substituted-2-oxo(1H)-pyridin-3-yl group as a base. Preferably, the 5-position of the above base is substituted with a substituent selected from the group consisting of the following: 1) a photoreactive group selected from iodine and bromine; 2) an alkenyl group, an alkynyl group or an amino group, or a derivative thereof; 3) biotin or a derivative thereof; and 4) a fluorescent molecule selected from fluorescein, 6-carboxyfluorescein, tetramethyl-6-carboxyrhodamine, and derivatives thereof.
Nucleosides or nucleotides having novel unnatural bases and use thereof
申请人:RIKEN
公开号:US07745417B2
公开(公告)日:2010-06-29
The object of the present invention is to provide a nucleoside or nucleotide having an unnatural base. The nucleoside or nucleotide of the present invention has a 5-substituted-2-oxo(1H)-pyridin-3-yl group as a base. Preferably, the 5-position of the above base is substituted with a substituent selected from the group consisting of the following:
1) a photoreactive group selected from iodine and bromine;
2) an alkenyl group, an alkynyl group or an amino group, or a derivative thereof;
3) biotin or a derivative thereof; and
4) a fluorescent molecule selected from fluorescein, 6-carboxyfluorescein, tetramethyl-6-carboxyrhodamine, and derivatives thereof.