The present invention relates to methods for the preparation of chemically aminoacylated tRNAs for the purpose of introduction of markers into nascent proteins. The present invention also relates to methods for the non-radioactive labeling, detection, quantitation and isolation of nascent proteins translated in a cellular or cell-free translation system utilizing chemically aminoacylated tRNAs. tRNA molecules are misaminoacylated with non-radioactive markers which may be non-native amino acids, amino acid analogs or derivatives. Markers may comprise cleavable moieties, detectable labels, reporter properties wherein markers incorporated into protein can be distinguished from unincorporated markers, or coupling agents which facilitate the detection and isolation of nascent protein from other components of the translation system.
本发明涉及用于制备
化学氨酰化tRNA的方法,目的是将标记物引入新生蛋白质中。本发明还涉及用于在细胞或无细胞翻译系统中翻译的新生蛋白质的非放射性标记、检测、定量和分离的方法,利用
化学氨酰化的tRNA。tRNA分子被非放射性标记物误
氨酰化,这些标记物可以是非天然
氨基酸、
氨基酸类似物或衍
生物。标记物可能包括可切割的基团、可检测的标签、报告性质,其中蛋白质中包含的标记物可以与未包含的标记物区分开来,或者促进检测和从翻译系统的其他组分中分离新生蛋白质的耦合剂。