Peptide purification using the chemoselective reaction between N-(methoxy)glycine and isothiocyanato-functionalized resin.
An efficient peptide purification strategy is established, comprising the selective reaction of an N-terminal N-(methoxy)glycine residue of the peptide and isothiocyanato-functionalized resins, and subsequent Edman degradation. These reactions take place in acidic media; in particular, the Edman degradation proceeds smoothly in media containing more than 50% trifluoroacetic acid (v/v). These acidic conditions offer increased solubility, making them advantageous for the purification of hydrophobic and aggregation-prone peptides. The effectiveness of this method, together with scope and limitations, is demonstrated using model peptides and the practical purification of the loop region of the human dopamine D2 receptor long isoform (residues 240-272). Copyright © 2016 European Peptide Society and John Wiley & Sons, Ltd.
Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka, 560-0043, Japan.|JST ERATO, Lipid Active Structure Project, Osaka University, Toyonaka, Osaka, 560-0043, Japan.
Toshiaki
T
Hara
Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Osaka, 565-0871, Japan.
Akira
A
Tainosyo
Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Osaka, 565-0871, Japan.
Toru
T
Kawakami
Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Osaka, 565-0871, Japan.
Saburo
S
Aimoto
Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka, 560-0043, Japan.|JST ERATO, Lipid Active Structure Project, Osaka University, Toyonaka, Osaka, 560-0043, Japan.
Michio
M
Murata
D000595:Amino Acid Sequence; D020650:Combinatorial Chemistry Techniques; D005998:Glycine / Q000737:chemistry*; D006801:Humans; D017879:Isothiocyanates / Q000737:chemistry*; D010455:Peptides / Q000737:chemistry / Q000302:isolation & purification*; D017448:Receptors, Dopamine D2 / Q000737:chemistry*; D014269:Trifluoroacetic Acid / Q000737:chemistry
C581293:DRD2 protein, human; D017879:Isothiocyanates; D010455:Peptides; D017448:Receptors, Dopamine D2; D014269:Trifluoroacetic Acid; D005998:Glycine
Edman degradation; N-(methoxy)glycine; peptide purification; selective capture