An improved method for de novo sequencing of arginine-containing, Nalpha-tris(2,4,6-trimethoxyphenyl)phosphonium-acetylated peptides.
An improved method for de novo sequencing of arginine-containing peptides modified with succinimidyloxycarbonylmethyl tris(2,4,6-trimethoxyphenyl)phosphonium bromide (TMPP-Ac-OSu) is reported. A tagging reagent, TMPP-Ac-OSu, was introduced to improve the sequence analysis of peptides owing to the simplified fragmentation pattern. However, peptides containing arginine residues did not fragment efficiently even after TMPP-Ac modification at their N-termini. This report describes how fragmentation efficiency of TMPP-Ac-modified arginine-containing peptides was significantly improved by modifying the guanidino group on the side chain of arginine with acetylacetone.
Kuyama
Hiroki
H
Institute for Protein Research, Osaka University, Suita 565-0871, Japan. kuyama@protein.osaka-u.ac.jp
Sonomura
Kazuhiro
K
Shima
Keisuke
K
Nishimura
Osamu
O
Tsunasawa
Susumu
S
D000107:Acetylation; D001120:Arginine / Q000737:chemistry*; D019086:Bridged Bicyclo Compounds, Heterocyclic / Q000737:chemistry*; D010449:Peptide Mapping / Q000379:methods*; D010455:Peptides / Q000737:chemistry*; D017905:Phosphites / Q000737:chemistry*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D020539:Sequence Analysis, Protein / Q000379:methods*; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization / Q000379:methods*
D019086:Bridged Bicyclo Compounds, Heterocyclic; D010455:Peptides; D017905:Phosphites; C018165:trimethylolpropane phosphite; D001120:Arginine