Presence of a dipeptidyl aminopeptidase III in Saccharomyces cerevisiae.
作者:Yasuhiro WATANABE、Yuka KUMAGAI、Yukio FUJIMOTO
DOI:10.1248/cpb.38.246
日期:——
The soluble fraction of a cell extract of Saccharomyces cerevisiae was found to contain hydrolytic activity toward arginyl-arginyl-β-naphthylamide (Arg-Arg-βNA). Most of the contaminating Arg-βNA hydrolysis activity was removed by diethylaminoethyl (DEAE)-cellulose column chromatography and the enzyme was partially purified. It is very similar in various properties to mammalian dipeptidyl aminopeptidase III (DAP III), although it differs slightly in some respects.
A reagent for testing periodontal diseases which diagnoses or prognosticates contraction or progress of said diseases by determining aminopeptidase-like enzymatic activity in a specimen, said reagent comprises as a substrate for the enzyme either or both compounds of the formula:
X-Z-Arg-Y [1]
wherein Arg is arginine residue; X is hydrogen or an amino blocking group; Y is a color developing group attached to the C-terminal of Arg; and Z is an amino acid or peptide residue composed of 1 to 4 amino acids or their blocked derivatives, the C-terminal of which is attached to the N-terminal of Arg, and
Xʹ-Zʹ-Pro-Yʹ [2]
wherein Pro is proline residue; Xʹ is hydrogen or an amino blocking group; Yʹ is a color developing group attached to the C-terminal of Pro; and Zʹ is an amino acid or peptide residue composed of 0 to 4 amino acids or their blocked derivatives, the C-terminal of which is attached to the N-terminal of Pro.
一种检测牙周疾病的试剂,它通过测定标本中氨基肽酶样酶的活性来诊断或预测所述疾病的收缩或进展,所述试剂包括作为酶底物的式中的一种或两种化合物:
X-Z-Arg-Y [1]
其中 Arg 是精氨酸残基;X 是氢或氨基封端基;Y 是连接到 Arg C 端的显色基团;Z 是由 1 至 4 个氨基酸或其封端衍生物组成的氨基酸或肽残基,其 C 端连接到 Arg 的 N 端,以及
Xʹ-Zʹ-Pro-Yʹ[2]
其中Pro是脯氨酸残基;Xʹ是氢或氨基封端基;Yʹ是连接到Pro的C-末端的显色基团;Zʹ是由0至4个氨基酸或其封端衍生物组成的氨基酸或肽残基,其C-末端连接到Pro的N-末端。