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A Protein-Tagging System for Signal Amplification in Gene Expression and Fluorescence Imaging

Open access
Tanenbaum, Marvin E., Gilbert, Luke A., Qi, Lei S., Weissman, Jonathan S., Vale, Ronald D.·2014·Cell

Abstract

Summary Signals in many biological processes can be amplified by recruiting multiple copies of regulatory proteins to a site of action. Harnessing this principle, we have developed a novel protein scaffold, a repeating peptide array termed SunTag, which can recruit multiple copies of an antibody-fusion protein. We show that the SunTag can recruit up to 24 copies of GFP, thereby enabling long-term imaging of single protein molecules in living cells. We also use the SunTag to create a potent synthetic transcription factor by recruiting multiple copies of a transcriptional activation domain to a nuclease-deficient CRISPR/Cas9 protein and demonstrate strong activation of endogenous gene expression and re-engineered cell behavior with this system. Thus, the SunTag provides a versatile platform for multimerizing proteins on a target protein scaffold and is likely to have many applications in imaging and in controlling biological outputs.

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Metadata

Authors
Tanenbaum, M. E., Gilbert, L. A., Qi, L. S., Weissman, J. S., & Vale, R. D.
Venue
Cell
Publisher
Elsevier BV
Published
2014-10
Volume
159
Issue
3
Pages
635-646
ISSN
0092-8674 (ISSN-L)
OpenAlex
W2169373177
Cited by
1,580
References
7
FWCI
52.34
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: A Protein-Tagging System for Signal Amplification in Gene Expression and Fluorescence Imaging. https://app.cochat.ai/papers/10.1016/j.cell.2014.09.039
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Tanenbaum, M. E., Gilbert, L. A., Qi, L. S., Weissman, J. S., & Vale, R. D. (2014). A Protein-Tagging System for Signal Amplification in Gene Expression and Fluorescence Imaging. Cell. https://doi.org/10.1016/j.cell.2014.09.039

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