Disclosed are polymers comprising the moiety A, which is a moiety of formula I: and pharmaceutically acceptable salts thereof, wherein R, R
1
, R
2
, L, n1 and n2 are as defined herein. These polymers are useful for delivering nucleic acids to subject. These polymers and pharmaceutically acceptable compositions comprising such polymers and nucleic acids can be useful for treating various diseases, disorders and conditions.
Three novelreagents have been prepared to introduce photoactivatable o-nitrobenzyl phosphateesters. The use of fluorenylmethyl and t-butyl protecting groups allowed for a wide range of chemical transformations after phosphorylation. In addition, the use of S-acetylthioethyl and acyloxymethyl groups resulted in photo- and bioactivatable phosphate triesters of phosphatidic acid.
Direct One-Step Fluorescent Labeling of <i>O</i>-GlcNAc-Modified Proteins in Live Cells Using Metabolic Intermediates
作者:Hong Yee Tan、Razieh Eskandari、David Shen、Yanping Zhu、Ta-Wei Liu、Lianne I. Willems、Matthew G. Alteen、Zarina Madden、David J. Vocadlo
DOI:10.1021/jacs.8b08260
日期:2018.11.14
donor sugar substrates permit direct monitoring of OGT activity on protein substrates in vitro. We show that feeding cells with a corresponding fluorescent metabolic precursor for the last step of the hexosamine biosynthetic pathway (HBP) leads to its metabolic assimilation and labeling of O-GlcNAcylated proteins within live cells. This one-step metabolic feeding strategy permits labeling of O-GlcNAcylated