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Site-specific chemical modification of recombinant proteins produced in mammalian cells by using the genetically encoded aldehyde tag

Open access
Wu, Peng, Shui, Wenqing, Carlson, Brian L., Hu, Nancy, Rabuka, David, Lee, Julia, Bertozzi, Carolyn R.·2009·Proceedings of the National Academy of Sciences

Abstract

The properties of therapeutic proteins can be enhanced by chemical modification. Methods for site-specific protein conjugation are critical to such efforts. Here, we demonstrate that recombinant proteins expressed in mammalian cells can be site-specifically modified by using a genetically encoded aldehyde tag. We introduced the peptide sequence recognized by the endoplasmic reticulum (ER)-resident formylglycine generating enzyme (FGE), which can be as short as 6 residues, into heterologous proteins expressed in mammalian cells. Cotranslational modification of the proteins by FGE produced products bearing a unique aldehyde group. Proteins bearing this “aldehyde tag” were chemically modified by selective reaction with hydrazide- or aminooxy-functionalized reagents. We applied the technique to site-specific modification of monoclonal antibodies, the fastest growing class of biopharmaceuticals, as well as membrane-associated and cytosolic proteins expressed in mammalian cells.

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Metadata

Authors
Wu, P., Shui, W., Carlson, B. L., Hu, N., Rabuka, D., Lee, J., & Bertozzi, C. R.
Venue
Proceedings of the National Academy of Sciences
Published
2009-03-03
Volume
106
Issue
9
Pages
3000-3005
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W1979108979
Cited by
237
References
4
FWCI
8.62
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Site-specific chemical modification of recombinant proteins produced in mammalian cells by using the genetically encoded aldehyde tag. https://app.cochat.ai/papers/10.1073/pnas.0807820106
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Wu, P., Shui, W., Carlson, B. L., Hu, N., Rabuka, D., Lee, J., & Bertozzi, C. R. (2009). Site-specific chemical modification of recombinant proteins produced in mammalian cells by using the genetically encoded aldehyde tag. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.0807820106

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