青鳉组织蛋白酶E基因全长cDNA克隆与功能预测
利用反转录聚合酶链式反应和cDNA末端快速扩增技术克隆青鳉(Oryzias latipes)肠道组织蛋白酶E(cathepsin E,CtpE)基因全长cDNA序列,并分析青鳉组织蛋白酶(OlCtpE)的功能。结果显示:OlCtpE基因cDNA(GenBank登录号:KP864679)全长1 301 bp,其中5'端非翻译区24 bp,3'端非翻译区56 bp,开放阅读框1 221 bp,编码406个氨基酸;OlCtpE蛋白N端含有一个由17个氨基酸组成的信号肽,属于分泌蛋白;同源比对显示,OlCtpE蛋白由2个以活性位点"DTGT"为催化中心的同源结构域组成,对称分布的2个保守的催化中心形成...
Saved in:
Published in | 浙江大学学报(农业与生命科学版) Vol. 43; no. 2; pp. 183 - 191 |
---|---|
Main Author | |
Format | Journal Article |
Language | Chinese |
Published |
沈阳工学院生命工程学院,辽宁抚顺,113122%辽宁省食品检验检测院,沈阳,110015%吉林大学生命科学学院,长春,130012
2017
|
Subjects | |
Online Access | Get full text |
ISSN | 1008-9209 |
DOI | 10.3785/j.issn.1008-9209.2016.04.111 |
Cover
Summary: | 利用反转录聚合酶链式反应和cDNA末端快速扩增技术克隆青鳉(Oryzias latipes)肠道组织蛋白酶E(cathepsin E,CtpE)基因全长cDNA序列,并分析青鳉组织蛋白酶(OlCtpE)的功能。结果显示:OlCtpE基因cDNA(GenBank登录号:KP864679)全长1 301 bp,其中5'端非翻译区24 bp,3'端非翻译区56 bp,开放阅读框1 221 bp,编码406个氨基酸;OlCtpE蛋白N端含有一个由17个氨基酸组成的信号肽,属于分泌蛋白;同源比对显示,OlCtpE蛋白由2个以活性位点"DTGT"为催化中心的同源结构域组成,对称分布的2个保守的催化中心形成"催化二联体";三级结构分析显示,负责底物固定的"活性中心翼环"延伸到活性部位上,活性部位的发夹式裂隙可以为底物与酶的契合提供空间。 |
---|---|
Bibliography: | WANG Jiaqing1, DONG Huiming2, LI Zhengang3, LI Shaoming1, WANG Ruonan1, FU Yujie1 (1. College of Life Engineering Shenyang Institute of Technology, Fushun 113122, Liaoning, China; 2. Liaoning Institute for Food Control, Shenyang 110015 China; 3. School of Life Science, Jilin University, Changchun 130012, China) 33-1247/S Summary Cathepsin is a kind of protease that mainly exists in intracellular lysosome. Under the weak acid condition, cathepsin can be activated and acts as hydrolysate protein. Based on the different mechanisms of the protein hydrolysis, cathepsin is divided into four species, including aspartic acid protease, cysteine protease, serine protease and threonine protease. Cathepsin D and cathepsin E (CtpE) both belong to aspartic proteases, while the latter is fundamental basis for life activities of mammals. Moreover, CtpE is an important enzyme in participating physiological processes of aquatic animals, such as digestion, yolk formation and immune response. However, few researches were focused o |
ISSN: | 1008-9209 |
DOI: | 10.3785/j.issn.1008-9209.2016.04.111 |