Modification of N-Terminal α-Amino Groups of Peptides and Proteins Using Ketenes
作者:Anna On-Yee Chan、Chi-Ming Ho、Hiu-Chi Chong、Yun-Chung Leung、Jie-Sheng Huang、Man-Kin Wong、Chi-Ming Che
DOI:10.1021/ja208009r
日期:2012.2.8
of highly selective N-terminal modification of proteins as well as peptides by an isolated ketene was developed. Modification of a library of unprotected peptides XSKFR (X varies over 20 natural amino acids) by an alkyne-functionalized ketene (1) at room temperature at pH 6.3 resulted in excellent N-terminal selectivity (modified α-amino group/modified ε-amino group = >99:1) for 13 out of the 20 peptides
N-terminal α-amino group modification of peptides by an oxime formation–exchange reaction sequence
作者:Karen Ka-Yan Kung、Kong-Fan Wong、King-Chi Leung、Man-Kin Wong
DOI:10.1039/c3cc42261e
日期:——
A site-specific and efficient method for N-terminal modification of peptides using oxone for selective oxidation of N-terminal α-amino groups of peptides to oximes followed by transoximation with O-substituted hydroxylamines has been developed.