Inhibition of proteasome activity by the TED4 protein in extracellular space: a novel mechanism for protection of living cells from injury caused by dying cells.

Inhibition of proteasome activity by the TED4 protein in extracellular space: a novel mechanism for protection of living cells from injury caused by dying cells.
复制标题

细胞外空间中 TED4 蛋白对蛋白酶体活性的抑制:保护活细胞免受死亡细胞损伤的新机制。

DOI:
10.1093/pcp/pce002
复制
发表时间:
2001
影响因子:
4.9
通讯作者:
Hiroo Fukuda
Hiroo Fukuda
中科院分区:
生物学2区
文献类型:
--
作者:
Satoshi Endo;T. Demura;Hiroo Fukuda

文献摘要

参考文献

被引文献

相似文献

在导管分子分化成熟过程中,许多水解酶被激活,从而执行导管分子的程序性细胞死亡。这些水解酶从成熟的TE释放到细胞外空间。水解酶的释放应该对周围细胞有害。TED4蛋白是一种初步的植物非特异性脂质转移蛋白,其在TE诱导的百日菊(Zinnia elegans L.)培养物中优先表达,在TE形态变化之前并与其相关地分泌到质外体间隙中。我们的研究TED4蛋白和蛋白水解活性之间的相互关系,使用一个在体外TE分化系统的百日菊揭示了以下事实。(1)在TE分化的成熟阶段,活性蛋白酶体被释放到培养基中。(2)TED4蛋白在培养基中与蛋白酶体形成复合物。(3)TED4蛋白抑制了百日菊细胞的培养基和粗提物中的蛋白酶体活性。(4)培养基中TED4蛋白的消耗导致其他活细胞死亡率的增加。这些结果强烈表明,分泌的TED4蛋白作为蛋白酶体的抑制剂,以保护其他细胞免受由于从垂死的TE渗出的蛋白水解活性而引起的不期望的损伤。
In maturation process of tracheary element (TE) differentiation, many hydrolases are activated to execute programmed cell death of TEs. Such hydrolases are released from maturing TEs into extracellular space. The release of hydrolases should be harmful to surrounding cells. The TED4 protein, a tentative plant non-specific lipid transfer protein that is expressed preferentially in TE-induced culture of zinnia (Zinnia elegans L.), is secreted into the apoplastic space prior to and associated with morphological changes of TEs. Our studies on the interrelationship between the TED4 protein and proteolytic activities using an in vitro TE differentiation system of zinnia revealed the following facts. (1) Active proteasome is released into medium at maturation stage of TE differentiation. (2) The TED4 protein forms a complex with proteasome in culture medium. (3) The TED4 protein inhibits proteasome activity in the medium and crude extracts of zinnia cells. (4) The depletion of the TED4 protein from culture medium results in an increase in mortality of other living cells. These results strongly suggest that the secreted TED4 protein acts as an inhibitor of proteasome to protect other cells from undesirable injury due to proteolytic activities exudated from dying TEs.
DOI: 10.1016/s0021-9258(18)37771-8
发表时间: 1988-09
期刊: The Journal of biological chemistry
影响因子: --
作者:
D. Ganoth;Esther Leshinsky;E. Eytan;A. Hershko
通讯作者: D. Ganoth;Esther Leshinsky;E. Eytan;A. Hershko
DOI: 10.1016/0955-0674(95)80031-x
发表时间: 1995-04-01
影响因子: 7.5
作者:
HOCHSTRASSER, M
通讯作者: HOCHSTRASSER, M
干扰素γ和主要组织相容性复合物编码亚基对人类多催化蛋白酶肽酶活性的影响。
DOI: 10.1073/pnas.92.2.584
发表时间: 1995
影响因子: 11.1
作者:
Ustrell,V;Pratt,G;Rechsteiner,M
通讯作者: Rechsteiner,M
多催化蛋白酶复合物中的一种新型胰凝乳蛋白酶样成分,在酸性 pH 条件下具有最佳活性。
DOI: 10.1006/abbi.1995.1137
发表时间: 1995
影响因子: 3.9
作者:
Figueiredo-Pereira,ME;Chen,WE;Yuan,HM;Wilk,S
通讯作者: Wilk,S
拟南芥 20S 蛋白酶体基因家族的分子组织。
DOI: 10.1093/genetics/149.2.677
发表时间: 1998
期刊: Genetics
影响因子: 3.3
作者:
Fu,H;Doelling,JH;Arendt,CS;Hochstrasser,M;Vierstra,RD
通讯作者: Vierstra,RD