Ribonuclease T<sub>1</sub>Peptides. I. Synthesis of a Protected<i>N</i>-Terminal Undecapeptide Containing Asparagine Residue in Third Position
作者:Motonori Ohno、Tetsuo Kato、Nobuo Mitsuyasu、Michinori Waki、Satoru Makisumi、Nobuo Izumiya
DOI:10.1246/bcsj.40.204
日期:1967.1
A protected undecapeptide containing the possible N-terminal sequence of ribonuclease T1, namely benzyloxycarbonyl-l-alanyl-S-benzyl-l-cysteinyl-l-asparaginyl-l-tyrosyl-l-threonyl-S-benzyl-l-cysteinyl-glycyl-l-seryl-l-asparaginyl-S-benzyl-l-cysteinyl-l-tyrosine ethyl ester (XXI), was synthesized by coupling of benzyloxycarbonyl-alanyl-S-benzylcysteinyl-asparaginyl-tyrosine azide with heptapeptide ester, threonyl-S-benzylcysteinyl-glycyl-seryl-asparaginyl-S-benzylcysteinyl-tyrosine ester, which is derived from p-methoxybenzyloxycarbonyl-heptapeptide ester by the action of trifluoroacetic acid. The optical homogeneity of the protected undecapeptide (XXI) was established by deblocking of XXI and subsequently digesting the resulting free undecapeptide with leucine aminopeptidase.
由对甲氧基苄氧羰基七肽酯与苏氨酰-S-苄基-天冬氨酰-甘氨酰-丝氨酰-天冬氨酰-S-苄基-天冬氨酰-酪氨酸酯偶联合成。通过解锁 XXI 并用亮氨酸氨肽酶消化游离出的后十肽,确定了受保护的后十肽(XXI)的光学均匀性。