申请人:The Regents of the University of California
公开号:US10202584B2
公开(公告)日:2019-02-12
A bioluminescent protein is provided that includes a substituted luciferase polypeptide having amino acid substitutions at positions 21 and 166, and with one or more additional amino acid substitutions at positions 3, 16, 20, 29, 30, 71, 87, 114, and 144, compared to the parent polypeptide. Also provided is a luciferin that has a selenium-containing group at position C8 of an imidazopyrazine backbone, and methods of making the luciferin. In addition, nucleic acids encoding the bioluminescent protein, cells expressing the bioluminescent protein, and reactions between the bioluminescent protein and luciferin substrates are also provided. Fusions between the substituted luciferase polypeptide and a fluorescent protein are also provided for bioluminescence resonance energy transfer based reporters.
本发明提供了一种生物发光蛋白,它包括一种取代的荧光素酶多肽,与母体多肽相比,该多肽在 21 和 166 位具有氨基酸取代,并在 3、16、20、29、30、71、87、114 和 144 位具有一个或多个额外的氨基酸取代。还提供了一种在咪唑吡嗪骨架的 C8 位具有含硒基团的荧光素,以及制造这种荧光素的方法。此外,还提供了编码生物发光蛋白的核酸、表达生物发光蛋白的细胞以及生物发光蛋白与荧光素底物之间的反应。还提供了替代荧光素酶多肽与荧光蛋白之间的融合,用于基于生物发光共振能量转移的报告。