Multiplexed labeling of cellular proteins with split fluorescent protein tags.

Multiplexed labeling of cellular proteins with split fluorescent protein tags.
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DOI:
10.1038/s42003-021-01780-4
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发表时间:
2021-02-26
影响因子:
5.9
通讯作者:
Kamiyama D
Kamiyama D
中科院分区:
生物学2区
文献类型:
--
作者:
Tamura R;Jiang F;Xie J;Kamiyama D

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Self-complementing split fluorescent proteins (split FP1-10/11) have become an important labeling tool in live-cell protein imaging. However, current split FP systems to label multiple proteins in single cells have a fundamental limitation in the number of proteins that can be simultaneously labeled. Here, we describe an approach to expand the number of orthogonal split FP systems with spectrally distinct colors. By combining rational design and cycles of directed evolution, we expand the spectral color palette of FP1-10/11. We also circularly permutate GFP and synthesize the β-strand 7, 8, or 10 system. These split GFP pairs are not only capable of labeling proteins but are also orthogonal to the current FP1-10/11 pairs, offering multiplexed labeling of cellular proteins. Our multiplexing approach, using the new orthogonal split FP systems, demonstrates simultaneous imaging of four distinct proteins in single cells; the resulting images reveal nuclear localization of focal adhesion protein Zyxin. Tamura et al. expand the split fluorescent protein system to multi-colour imaging (six-colours). Their multiplexing approach, using the orthogonal split FP systems, allows simultaneous imaging of four distinct proteins in single cells.
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