Studies on peptides. CXLVII Synthesis of valosin, a novel 25-residue peptide from porcine intestine.
作者:KENICHI AKAJI、MICHINORI TANAKA、SHOICHIRO SUMI、MASAFUMI KOGIRE、KYOICHI TAKAORI、RYUICHIRO DOI、KAZUTOMO INOUE、TAKAYOSHI TOBE、MOTOYUKI MORIGA、MITSURU AONO、HARUAKI YAJIMA
DOI:10.1248/cpb.35.535
日期:——
A 25-residue peptide isolated from porcine intestine, designated valosin, was synthesized by assembling seven peptide fragments of established purity, followed by deprotection with 1 M trifluoromethanesulfonic acid in trifluoroacetic acid. γ-Cycloheptylglutamate, [Glu (OChp)], was employed to suppress pyrrolidone formation during fragment condensation. Before deprotection, Met (O) was reduced with phenylthiotrimethylsilane and trimethylsilyl trifluoromethanesulfonate. The effect of the synthetic peptide on arterial pressure, blood flow in the superior mesenteric artery, pancreatic capillary blood flow and pancreatic exocrine secretion was examined in dogs, but no significant dose-dependent response was observed. In rats, synthetic valosin stimulated pancreatic secretion, but showed no anti-gastric activity.
通过组装七个已确定纯度的肽片段,然后用三氟乙酸中的 1 M 三氟甲磺酸去保护,合成了从猪肠中分离出的 25 个残基肽,命名为缬洛新。 γ-环庚基谷氨酸,[Glu (OChp)],用于抑制片段缩合过程中吡咯烷酮的形成。在脱保护之前,用苯硫基三甲基硅烷和三氟甲磺酸三甲基甲硅烷基酯还原Met (O)。在狗身上检查了合成肽对动脉压、肠系膜上动脉血流、胰腺毛细血管血流和胰腺外分泌分泌的影响,但没有观察到明显的剂量依赖性反应。在大鼠中,合成的缬洛辛刺激胰腺分泌,但没有表现出抗胃活性。