作者:Kunio IMAI、Toshikazu NOMURA、Hirotaka KATSUZAKI、Takashi KOMIYA、Okitsugu YAMASHITA
DOI:10.1271/bbb.62.1875
日期:1998.1
Diapause hormone is a 24-amino acid peptide amide, and its C-terminal penta-peptide amide structure of FGPRL-NH2 is believed to be essential for biological activity. The penta-peptide amide, the shorter peptide amides, and their derivatives and analogs were prepared to determine the minimal structure for biological activity. The C-terminal amide group of the penta-peptide amide was not replaced with the other functional groups, but Gly, the 4th amino acid from the C terminal, could be substituted with an other amino acid while maintaining the biological activity. The shorter peptide amide, PRL-NH2, possessed low but significant activity, indicating the minimum structure of diapause hormone. By modifying its N-terminal, the aromatic ring of Phe is shown to enhance the activity of PRL-NH2.
滞育激素是一种由24个氨基酸组成的肽酰胺,其C端五肽酰胺结构FGPRL-NH2被认为对生物活性至关重要。为了确定生物活性所需的最小结构,制备了五肽酰胺、较短的肽酰胺及其衍生物和类似物。五肽酰胺的C端酰胺基团未被其他功能基团替代,但Gly,即从C端起第四个氨基酸,可以在保持生物活性的前提下被其他氨基酸替换。较短的肽酰胺PRL-NH2具有较低但显著的活性,表明这是滞育激素的最小结构。通过修饰其N端,发现苯环对活性的增强作用,揭示了Phe环在PRL-NH2活性提升中的作用。