lysine, followed by Fmoc deprotection. The resulting compounds did not dissolve well in aqueous solvent, but could be solubilized with the assistance of surfactants, including cholicacid. The l-amino acid transporter (LAT1) can uptake diverse neutral l-amino acids. In vitro studies with U87 cells revealed a non-specific uptake of the hydrophobic Fmoc-protected lysine-conjugated mTCPP precursors, but
Lipid Pools As Photolabile “Protecting Groups”: Design of Light-Activatable Bioagents
作者:Luong T. Nguyen、Nathan P. Oien、Nancy L. Allbritton、David S. Lawrence
DOI:10.1002/anie.201305510
日期:2013.9.16
Inactive in the membrane: Lipidated light‐responsive constructs that sequester bioagents (R, see scheme) to the membranes of organelles and cells have been constructed. When membrane‐bound, the bioagent is not susceptible to processing by its biological target. Photolysis releases the bioagent from its membrane anchor and thereby renders it biologically active.
Investigating<scp>d</scp>-lysine stereochemistry for epigenetic methylation, demethylation and recognition
作者:Roman Belle、Abbas H. K. Al Temimi、Kiran Kumar、Bas J. G. E. Pieters、Anthony Tumber、James E. Dunford、Catrine Johansson、Udo Oppermann、Tom Brown、Christopher J. Schofield、Richard J. Hopkinson、Robert S. Paton、Akane Kawamura、Jasmin Mecinović
DOI:10.1039/c7cc08028j
日期:——
Histone lysine methylation is regulated by Nε-methyltransferases, demethylases, and Nε-methyl lysine binding proteins. Thermodynamic, catalytic and computational studies were carried out to investigate the interaction of three epigenetic protein classes with synthetic histone substrates containing L- and D-lysine residues. The results reveal that out of the three classes, Nε-methyl lysine binding proteins
copper(II)-catalyzed diazo transfer method, and introduced to a peptide by the ordinary Fmoc-based solid-phase peptide synthesis. This azido peptide could be condensed with a peptidethioester by the Ag+-free thioester method without any significant side reactions. The azido group was easily reduced to an amino group by Zn powder after peptide condensation.