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A trimethyllysine-containing trityl tag for solubilizing hydrophobic peptides.

Shun MasudaShugo TsudaTaku Yoshiya
Published in: Organic & biomolecular chemistry (2019)
Hydrophobic membrane peptides/proteins having low water solubility are often difficult to prepare. To overcome this issue, temporal introduction of solubilizing tags has been demonstrated to be beneficial. Following our recent work on the solubilization of a difficult target by using a hydrophilic oligo-Lys tag bearing a trityl linker (Trt-K method), this paper describes a comparative study of the solubilizing abilities of several peptidic trityl tags containing Lys, Arg, Glu, Asn, Nε-tri-Me-Lys or Cys-sulfonate using two hydrophobic model peptides. Among the tags evaluated, that containing Nε-tri-Me-Lys exhibits superior solubilizing ability.
Keyphrases
  • ionic liquid
  • amino acid
  • aqueous solution
  • liquid chromatography
  • mass spectrometry
  • high resolution