Studies of Bitter Peptides from Casein Hydrolyzate. X. Synthesis and Bitter Taste of H–Arg–Gly–Pro–Phe–Pro–Ile–Ile–Val–OH Corresponding to C-Terminal Portion of β-Casein
作者:Hidenori Kanehisa、Ichizo Miyake、Hideo Okai、Haruhiko Aoyagi、Nobuo Izumiya
DOI:10.1246/bcsj.57.819
日期:1984.3
In order to ascertain the validity of the structure of bitter peptide BPIa (H–Arg–Gly–Pro–Pro–Phe–Ile–Val–OH) isolated from casein hydrolyzate by Minamiura et al., the C-terminal octapeptide of β-casein (H–Arg–Gly–Pro–Phe–Pro–Ile–Ile–Val–OH) determined by Ribadeau Dumas et al., which is assumed to correspond to BPIa, was synthesized and compared with the synthetic BPIa which was confirmed to be identical with the natural one. The two synthesized peptides, however, did not match on thin-layer chromatography. The result indicates that the structure of BPIa need not be converted to Ribadeau Dumas’ formula. The octapeptide possessed an extremely bitter taste, with a threshold value of 0.004 mM (1 M=l mol dm−3). It is the most bitter peptide.
为了确定 Minamiura 等人从酪蛋白水解物中分离出的苦肽 BPIa(H-Arg-Gly-Pro-Pro-Phe-Ile-Val-OH)结构的有效性,Ribadeau Dumas 等人测定了 β-酪蛋白的 C 端八肽(H-Arg-Gly-Pro-Phe-Pro-Ile-Val-OH)、Ribadeau Dumas 等人确定了 β-酪蛋白的 C 端八肽(H-Arg-Gly-Pro-Phe-Pro-Ile-Ile-Val-OH),并假定其与 BPIa 相对应。然而,这两种合成肽在薄层色谱法上并不匹配。这一结果表明,BPIa 的结构无需转换成 Ribadeau Dumas 公式。八肽具有极苦的味道,阈值为 0.004 mM(1 M=l mol dm-3)。它是最苦的肽。