Selective Isotope Labelling of Leucine Residues by Using α-Ketoacid Precursor Compounds
作者:Roman J. Lichtenecker、Nicolas Coudevylle、Robert Konrat、Walther Schmid
DOI:10.1002/cbic.201200737
日期:2013.5.10
You can have one without the other: A new metabolic precursorcompound can selectively introduce 13C and 2H patterns at leucineresidues in proteins in cell‐based expression systems without interfering with valine metabolism. The protocol provides selectivelylabelled macromolecules well suited for probing structure and dynamics in high‐molecular‐weight proteins by NMR spectroscopy.
α-Ketoacids as precursors for phenylalanine and tyrosine labelling in cell-based protein overexpression
作者:Roman J. Lichtenecker、Katharina Weinhäupl、Walther Schmid、Robert Konrat
DOI:10.1007/s10858-013-9796-9
日期:2013.12
13C-α-ketoacid metabolic precursors of phenylalanine and tyrosine effectively enter the metabolism of a protein overexpressing E. coli strain to label Phe- and Tyr-residues devoid of any cross-labelling. The methodology gives access to highly selective labelling patterns as valuable tools in protein NMR spectroscopy without the need of 15N-chiral amino acid synthesis using organic chemistry.