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
复制标题
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
中科院分区:
文献类型:
--
作者:
Y. Murakami;S. Matsufuji;S. Hayashi;N. Tanahashi;Keiji Tanaka
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.
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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
影响因子:
56.9
作者:
GHODA, L;WETTERS, TV;COFFINO, P
通讯作者:
COFFINO, P
影响因子:
11.2
作者:
J. Moshier;J. Dosescu;M. Skunca;G. Luk
通讯作者:
J. Moshier;J. Dosescu;M. Skunca;G. Luk
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
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