A genetically encoded photocaged Nepsilon-methyl-L-lysine.
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abstract
A photocaged N(epsilon)-methyl-L-lysine has been genetically incorporated into proteins at amber codon positions in Escherichia coli using an evolved pyrrolysyl-tRNA synthetase-pylT pair. Its genetic incorporation and following photolysis to recover N(epsilon)-methyl-L-lysine at physiological pH provide a convenient method for the biosynthesis of proteins with monomethylated lysines at specific sites.