ATP-Dependent Inactivation and Sequestration of Ornithine Decarboxylase by the 26S Proteasome Are Prerequisites for Degradation

ATP-Dependent Inactivation and Sequestration of Ornithine Decarboxylase by the 26S Proteasome Are Prerequisites for Degradation
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26S 蛋白酶体对鸟氨酸脱羧酶的 ATP 依赖性失活和隔离是降解的先决条件

DOI:
10.1128/mcb.19.10.7216
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发表时间:
1999
影响因子:
5.3
通讯作者:
Keiji Tanaka
Keiji Tanaka
中科院分区:
生物学2区
文献类型:
--
作者:
Y. Murakami;S. Matsufuji;S. Hayashi;N. Tanahashi;Keiji Tanaka

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摘要26 S蛋白酶体是真核生物的一种ATP依赖性蛋白酶,但其能量需求的分子基础尚不清楚。鸟氨酸脱羧酶(ODC)是唯一已知的被26 S蛋白酶体降解而不被泛素化的酶。我们在这里报告说,26 S蛋白酶体是负责不可逆的失活耦合螯合ODC,一个过程需要ATP和抗酶(AZ),但不蛋白水解活性。无论是20 S蛋白酶体(催化核心),也不是PA 700(调节复合物)本身有助于这种ODC失活。与C-末端突变ODC的分析表明,26 S蛋白酶体识别的C-末端降解信号的ODC暴露的附件的AZ,和随后的ATP依赖性螯合的ODC在26 S蛋白酶体的原因不可逆的失活,可能展开,ODC和解离的AZ。这些过程可能与ODC移位到20 S蛋白酶体内腔(集中在26 S蛋白酶体内)进行降解有关。
ABSTRACT The 26S proteasome is a eukaryotic ATP-dependent protease, but the molecular basis of its energy requirement is largely unknown. Ornithine decarboxylase (ODC) is the only known enzyme to be degraded by the 26S proteasome without ubiquitinylation. We report here that the 26S proteasome is responsible for the irreversible inactivation coupled to sequestration of ODC, a process requiring ATP and antizyme (AZ) but not proteolytic activity. Neither the 20S proteasome (catalytic core) nor PA700 (the regulatory complex) by itself contributed to this ODC inactivation. Analysis with a C-terminal mutant ODC revealed that the 26S proteasome recognizes the C-terminal degradation signal of ODC exposed by attachment of AZ, and subsequent ATP-dependent sequestration of ODC in the 26S proteasome causes irreversible inactivation, possibly unfolding, of ODC and dissociation of AZ. These processes may be linked to the translocation of ODC into the 20S proteasomal inner cavity, centralized within the 26S proteasome, for degradation.
降解与泛素连接的蛋白质的 26 S 复合物的组装伴随着 ATP 酶活性的形成。
DOI: --
发表时间: 1990
期刊: The Journal of biological chemistry
影响因子: --
作者:
Armon,T;Ganoth,D;Hershko,A
通讯作者: Hershko,A
DOI: 10.1126/science.2928784
发表时间: 1989-03-17
期刊: SCIENCE
影响因子: 56.9
作者:
GHODA, L;WETTERS, TV;COFFINO, P
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DOI: --
发表时间: 1993-06
期刊: Cancer research
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来自兔网织红细胞裂解物的多种形式的 20 S 多催化蛋白酶和 26 S 泛素/ATP 依赖性蛋白酶。
DOI: --
发表时间: 1992
期刊: The Journal of biological chemistry
影响因子: --
作者:
Hoffman,L;Pratt,G;Rechsteiner,M
通讯作者: Rechsteiner,M
来自肝癌细胞和变异细胞系的鸟氨酸脱羧酶,其中该酶更稳定。
DOI: --
发表时间: 1982
期刊: The Journal of biological chemistry
影响因子: --
作者:
Pritchard,ML;Pegg,AE;Jefferson,LS
通讯作者: Jefferson,LS