申请人:Kikuchi Kazuya
公开号:US20110319603A1
公开(公告)日:2011-12-29
A method for fluorescently labeling a protein is provided that can also be used for labeling a biomolecule (a protein) in vivo with fluorescence. The method for fluorescently labeling a protein includes obtaining a fusion protein of a target protein to be labeled and, for example, a photoactive yellow protein (PYP), and fluorescently labeling the target protein by reacting the fusion protein with a compound represented by Formula (I), wherein in the compound represented by Formula (I), a coumarin skeleton in Formula (A) or a benzene skeleton in Formula (B) is intramolecnlarly associated with a group X and as a result, fluorescence derived from the group X is suppressed and when in the compound of Formula (I), the coumarin skeleton in Formula (A) or the benzene skeleton in Formula (B) is bound to the PYP or the PYP-derived protein contained in the fusion protein, the coumarin skeleton in Formula (A) or the benzene skeleton in Formula (B) is intramolecnlarly dissociated from the group X, and thereby fluorescence derived from the group X can be emitted.
提供了一种用于荧光标记蛋白质的方法,该方法也可用于在体内用荧光标记生物分子(蛋白质)。荧光标记蛋白质的方法包括获得目标蛋白质与例如光活性黄色蛋白(PYP)的融合蛋白质,并通过将融合蛋白质与由式(I)表示的化合物反应来荧光标记目标蛋白质。在式(I)表示的化合物中,式(A)中的香豆素骨架或式(B)中的苯骨架与基团X内部结合,从而抑制基于基团X的荧光。当在式(I)的化合物中,式(A)中的香豆素骨架或式(B)中的苯骨架与融合蛋白质中包含的PYP或PYP衍生蛋白质结合时,式(A)中的香豆素骨架或式(B)中的苯骨架与基团X内部解离,从而可以发射基于基团X的荧光。