80321-89-7Relevant articles and documents
Investigating cellular metabolism of synthetic azidosugars with the Staudinger ligation
Saxon, Eliana,Luchansky, Sarah J.,Hang, Howard C.,Yu, Chong,Lee, Sandy C.,Bertozzi, Carolyn R.
, p. 14893 - 14902 (2007/10/03)
The structure of sialic acid on living cells can be modulated by metabolism of unnatural biosynthetic precursors. Here we investigate the conversion of a panel of azide-functionalized mannosamine and glucosamine derivatives into cell-surface sialosides. A key tool in this study is the Staudinger ligation, a highly selective reaction between modified triarylphosphines and azides that produces an amide-linked product. A preliminary study of the mechanism of this reaction, and refined conditions for its in vivo execution, are reported. The reaction provided a means to label the glycoconjugate-bound azidosugars with biochemical probes. Finally, we demonstrate that the cell-surface Staudinger ligation is compatible with hydrazone formation from metabolically introduced ketones. These two strategies provide a means to selectively modify cell-surface glycans with exogenous probes.