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植物研究 ›› 2023, Vol. 43 ›› Issue (4): 622-630.doi: 10.7525/j.issn.1673-5102.2023.04.015

• 分子生物学 • 上一篇    下一篇

巴西橡胶树去泛素化酶UCHs基因的克隆及功能分析

袁铭悦1,2, 周天忠2,3, 余马1, 胡斌2, 龙翔宇2, 陈华1()   

  1. 1.西南科技大学生命科学与工程学院,绵阳 621010
    2.中国热带农业科学院橡胶研究所/农业农村部橡胶树生物学与遗传资源利用重点实验室/省部共建国家重点实验室培育基地-海南省热带作物栽培生理学重点实验室/农业农村部儋州热带作物科学观测试验站,海口 571101
    3.云南农业大学普洱学院,普洱 665099
  • 收稿日期:2023-03-19 出版日期:2023-07-20 发布日期:2023-07-03
  • 通讯作者: 陈华 E-mail:hchen@swust.edu.cn
  • 作者简介:袁铭悦(1998—),女,硕士研究生,主要从事橡胶树产胶分子生物学方面的研究。
  • 基金资助:
    国家自然科学基金面上项目(31971680);海南省自然科学基金创新团队项目(322CXTD526);中央级公益性科研院所基本科研业务费专项(1630022022009);西南科技大学博士基金项目(19ZX7117)

Cloning and Functional Analysis of Deubiquitinating Enzyme Gene UCHs from Hevea brasiliensis

Mingyue YUAN1,2, Tianzhong ZHOU2,3, Ma YU1, Bin HU2, Xiangyu LONG2, Hua CHEN1()   

  1. 1.School of Life Science and Engineering,Southwest University of Science and Technology,Mianyang 621010
    2.Rubber Research Institute,Chinese Academy of Tropical Agricultural Sciences/Key Laboratory of Biology and Genetic Resources of Rubber Tree,Ministry of Agriculture and Rural Affairs,P. R. China/State Key Laboratory Incubation Base for Cultivation & Physiology of Tropical Crops/Danzhou Investigation & Experiment Station of Tropical Crops,Ministry of Agriculture and Rural Affairs,CATAS,Haikou 571101
    3.Pu'er University,Yunnan Agricultural University,Puer 665099
  • Received:2023-03-19 Online:2023-07-20 Published:2023-07-03
  • Contact: Hua CHEN E-mail:hchen@swust.edu.cn
  • About author:YUAN Mingyue(1998—),female,master student,molecular biology of rubber production from rubber trees.
  • Supported by:
    Project of National Natural Science Foundation of China(31971680);Innovation Team Project of Hainan Natural Science Foundation(322CXTD526);Special Project of Basic Research Funds for Public Welfare Research Institutes of the Central Government(1630022022009);Southwest University of Science and Technology,PhD Foundation Project(19ZX7117)

摘要:

为探究去泛素化酶中泛素羧基末端水解酶(UCHs)在巴西橡胶树乳管泛素化过程中发挥的潜在功能,从巴西橡胶树中成功分离2个UCHs家族成员(HbUCH-L3HbUCH-L5)的全长序列,开放阅读框分别长993、558 bp,编码330、185个氨基酸,具有典型的UCHs结构域;qRT-PCR结果表明HbUCH-L3HbUCH-L5在各组织中均有表达,且在胶乳中表达丰度较低;HbUCHs重组蛋白的体外泛素化底物切割试验表明,HbUCH-L3和HbUCH-L5均具有水解泛素的功能。HbUCHs显著降低C乳清中总蛋白整体泛素化水平,且HbUCH-L3去泛素化酶活性高于HbUCH-L5。由此推测橡胶树UCHs在乳管中参与维持泛素化动态平衡进而发挥其特定的生物学功能,但具体的作用及调控机制尚不清楚。

关键词: 巴西橡胶树, 泛素羧基末端水解酶, 乳管泛素化, 体外泛素化底物切割

Abstract:

To investigate the potential function of ubiquitin carboxyl terminal hydrolases(UCHs) in the ubiquitination process of laticiferous of Hevea brasiliensis, the full-length sequences of two UCHs family members(HbUCH-L3 and HbUCH-L5) were isolated from Hevea brasiliensis, and both had typical UCHs domains. The open reading frame of HbUCH-L3 and HbUCH-L5 were 993 bp and 558 bp, and encoded 330 and 185 amino acids, respectively. The results of qRT-PCR showed that HbUCH-L3 and HbUCH-L5 were constitutively expressed in all tissues, but was low in latex. In vitro ubiquitination substrates cleavage of recombinant HbUCHs showed that both HbUCH-L3 and HbUCH-L5 had the function of hydrolyzing ubiquitin. HbUCHs significantly reduced the overall ubiquitination level of C-serum proteins; while, the deubiquitinating activity of HbUCH-L3 was higher than that of HbUCH-L5. Therefore, it was speculated that UCHs played a role in maintaining the dynamic balance of laticiferous ubiquitination and thus played a specific biological function, but the exact mechanism was still unclear.

Key words: Hevea brasiliensis, ubiquitin carboxy-terminal hydrolases, laticiferous ubiquitination, in vitro ubiquitination substrate cleavage

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