J. Biochem, 1994, Vol. 115, No. 2 208-212
© 1994 Japanese Biochemical Society
research-article |
Specific Chemical Cleavage of Asparaginyl and Glycyl-Glycine Bonds in Peptides and Proteins by Anhydrous Hydrazine Vapor1
*Research Institute for Biosciences, Science University of Tokyo 2669 Yamazaki, Noda, Chiba 278
**Department of Applied Biosciences, Science University of Tokyo 2669 Yamazaki, Noda, Chiba 278
2To whom correspondence should be addressed.
Hydrazinolysis of peptide or protein has been used for C-terminal amino acid determination by Akabori et al. (1952). In this study, proteins were reacted with anhydrous hydrazine vapor at 20°C for 16 h. Asparaginyl linkages were cleaved. Asparagine and glutamine were converted to their hydrazides, ß-hydrazidyl aspartic acid and
-hydrazidyl glutamic acid, respectively, even under milder conditions. The former hydrazide cyclizes to a 6-membered ring, asparaginyl bond at the carboxyl side. Other cleavages, including the glycyl-glycine bond, were also observed.
1This work was supported by a Grant-m-Aid for Specially Promoted Research form the Ministry of Education, Science and Culture of Japan This paper is dedicated to the late Professor Shiro Akabon, Osaka University.