Journal
SCIENCE
Volume 331, Issue 6017, Pages 571-575Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1198461
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Funding
- Skaggs Institute for Chemical Biology
- Lita Annenberg Hazen Foundation
- NIH [GM051105, F32 GM086039, AI072155]
- NSF [MCB 1019958]
- Direct For Biological Sciences
- Div Of Molecular and Cellular Bioscience [1019958] Funding Source: National Science Foundation
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N-glycosylation of eukaryotic proteins helps them fold and traverse the cellular secretory pathway and can increase their stability, although the molecular basis for stabilization is poorly understood. Glycosylation of proteins at naive sites (ones that normally are not glycosylated) could be useful for therapeutic and research applications but currently results in unpredictable changes to protein stability. We show that placing a phenylalanine residue two or three positions before a glycosylated asparagine in distinct reverse turns facilitates stabilizing interactions between the aromatic side chain and the first N-acetylglucosamine of the glycan. Glycosylating this portable structural module, an enhanced aromatic sequon, in three different proteins stabilizes their native states by -0.7 to -2.0 kilocalories per mole and increases cellular glycosylation efficiency.
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