利用活细胞中的蛋白质纳米笼定量比较 StayGold 单体变体

Giulia Viola, Kyle A Jacobs, Joel Lemiere, Matthew L Kutys, Torsten Wittmann
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引用次数: 0

摘要

为了对荧光蛋白进行标准化比较,并独立确定哪种单体 StayGold 变体最适合活体显微镜观察,我们分析了在活细胞内自组装成稳定的六十个亚单位十二面体的荧光蛋白标记 I3-01 肽。我们发现,在哺乳动物细胞质中,mStayGold 的亮度和光稳定性是 EGFP 的 3 倍,优于其他单体变体。此外,细胞内纳米笼扩散分析证实了 mStayGold 的单体性质。
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Quantitative Comparison of Monomeric StayGold Variants Using Protein Nanocages in Living Cells
To standardize comparison of fluorescent proteins and independently determine which monomeric StayGold variant is best for live microscopy, we analyzed fluorescent protein tagged I3-01 peptides that self-assemble into stable sixty subunit dodecahedrons inside live cells. We find mStayGold is 3-fold brighter and 3-fold more photostable compared with EGFP and superior to other monomeric variants in mammalian cytoplasm. In addition, analysis of intracellular nanocage diffusion confirms the monomeric nature of mStayGold.
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