Synthesis of the heptadecapeptide corresponding to the entire amino acid sequence of salmon melanin-concentrating hormone (MCH).
作者:KENJI OKAMOTO、KOICHI YASUMURA、KAZUYOSHI FUJITANI、YOSHIAKI KISO、HIROSHI KAWAUCHI、ICHIRO KAWAZOE、HARUAKI YAJIMA
DOI:10.1248/cpb.32.2963
日期:——
The heptadecapeptide corresponding to the entire amino acid sequence of melaninconcentrating hormone (MCH), isolated from chum salmon pituitaries, was synthesized by successive condensation of four peptide fragments and the N-terminal amino acid, i. e., Boc-(14-17)-OBzl, Boc-(9-13)-OH, Boc-(5-8)-NHNH2, Boc-(2-4)-NHNH2 and Boc-Asp (OBzl)-OH, followed by deprotection with 1 M trifluoromethanesulfonic acid-thioanisole in trifluoroacetic acid (TFA) and disulfide formation through the S-sulfonate. When melanin-concentrating activity was measured on a tilapia scale, the minimum effective concentration of the synthetic peptide was equivalent to that of natural salmon MCH (1nM).
从大麻哈鱼脑下垂体中分离出的、与促黑激素(MCH)整个氨基酸序列相对应的十七肽,是通过四个肽片段和N-端氨基酸,即Boc-(14-17)-OBzl、Boc-(9-13)-OH、Boc-(5-8)-NHNH2、Boc-(2-4)-NHNH2 和Boc-Asp(OBzl)-OH,依次缩合合成,随后用三氟乙酸(TFA)中的1M三氟甲磺酸-硫茴处理,通过S-磺酸酯形成二硫键并去保护。当在罗非鱼身上测量促黑活性时,合成肽的最小有效浓度与天然大麻哈鱼MCH的浓度(1nM)相当。