Effect of alpha,alpha-dialkyl amino acids on the protease resistance of peptides.

Biosci Biotechnol Biochem

Department of Chemistry, Faculty of Science and Engineering, Saga University, Saga, Japan.

Published: October 2003

A tryptic [EC 3.4.21.4] digestion assay of 2-aminoisobutyric acid (Aib)-containing peptides was carried out to investigate the effect of alpha,alpha-dialkyl amino acid residues on the protease resistance. The introduction of Aib residues to the P1' positions exhibited a 19-fold higher protease resistance than the peptide with Aib residues introduced to the P2 position or the non-Aib peptide. The peptide having Aib residues introduced to the P1' and P2 positions resulted in complete resistance.

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http://dx.doi.org/10.1271/bbb.67.2269DOI Listing

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