Noncytotoxic orange and red/green derivatives of DsRed-Express2 for whole-cell labeling.

Noncytotoxic orange and red/green derivatives of DsRed-Express2 for whole-cell labeling.
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DOI:
10.1186/1472-6750-9-32
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发表时间:
2009-04-03
期刊:
影响因子:
3.5
通讯作者:
Keenan RJ
Keenan RJ
中科院分区:
工程技术3区
文献类型:
--
作者:
Strack RL;Bhattacharyya D;Glick BS;Keenan RJ

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全细胞标记是荧光蛋白(FPs)的常见应用,但许多红色和橙色FPs表现出细胞毒性,限制了它们作为全细胞标记的使用。最近,一种名为DsRed-Express2的四聚体红色FP被设计用于提高溶解度,并被证明在细菌和哺乳动物细胞中无细胞毒性。我们的目标是创造这种蛋白质的衍生物,具有不同的光谱特性。基于先前对DsRed突变体的研究,我们创建了两个DsRed- express2衍生物:E2-Orange(橙色FP)和E2-Red/Green(红色和绿色双色FP)。我们发现这些新的FPs保留了DsRed-Express2的低细胞毒性。此外,我们发现这些新的FPs可用作流式细胞术和荧光显微镜的第二或第三种颜色。e2 -橙色和e2 -红/绿将有助于生产健康、稳定的荧光细胞系和转基因生物,用于多色标记研究。
Whole-cell labeling is a common application of fluorescent proteins (FPs), but many red and orange FPs exhibit cytotoxicity that limits their use as whole-cell labels. Recently, a tetrameric red FP called DsRed-Express2 was engineered for enhanced solubility and was shown to be noncytotoxic in bacterial and mammalian cells. Our goal was to create derivatives of this protein with different spectral properties. Building on previous studies of DsRed mutants, we created two DsRed-Express2 derivatives: E2-Orange, an orange FP, and E2-Red/Green, a dual-color FP with both red and green emission. We show that these new FPs retain the low cytotoxicity of DsRed-Express2. In addition, we show that these new FPs are useful as second or third colors for flow cytometry and fluorescence microscopy. E2-Orange and E2-Red/Green will facilitate the production of healthy, stably fluorescent cell lines and transgenic organisms for multi-color labeling studies.
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