O-GlcNAc Peptide Epoxyketones Are Recognized by Mammalian Proteasomes
摘要:
Cytosolic and nuclear proteins may be subject to both O-GlcNAcylation and proteasomal degradation. By means of activity-based profiling, we demonstrate that O-GlcNAc serine-containing peptide epoxyketones bind to the proteasome catalytic active sites and thus provide the first clear evidence that proteasomes recognize peptides post-translationally modified with a GlcNAc moiety.
O-GlcNAc Peptide Epoxyketones Are Recognized by Mammalian Proteasomes
摘要:
Cytosolic and nuclear proteins may be subject to both O-GlcNAcylation and proteasomal degradation. By means of activity-based profiling, we demonstrate that O-GlcNAc serine-containing peptide epoxyketones bind to the proteasome catalytic active sites and thus provide the first clear evidence that proteasomes recognize peptides post-translationally modified with a GlcNAc moiety.
High-throughput synthesis of azide libraries suitable for direct “click” chemistry and in situ screening
作者:Rajavel Srinivasan、Lay Pheng Tan、Hao Wu、Peng-Yu Yang、Karunakaran A. Kalesh、Shao Q. Yao
DOI:10.1039/b902338k
日期:——
building blocks (key components in clickchemistry). We report herein a highly robust and efficient strategy for high-throughput synthesis of a 325-member azide library. The method is highlighted by its simplicity and product purity. The utility of the library is demonstrated with the subsequent “click” synthesis of the corresponding bidentate inhibitors against PTP1B.