Co-translational Polyamine Sensing by Nascent ODC Antizyme
Co-translational Polyamine Sensing by Nascent ODC Antizyme
复制标题
新生 ODC 抗酶的共翻译多胺传感
DOI:
10.1007/978-4-431-55052-5_12
复制
发表时间:
2014
期刊:
影响因子:
--
通讯作者:
Dohmen
中科院分区:
文献类型:
--
作者:
Palanimurugan;Kurian;Dohmen
Polyamines are essential biogenic poly-cations with important roles in many cellular processes, including translation and DNA replication. High levels of polyamines have been linked to cancer. Increased levels of polyamines, however, have also been shown to promote longevity. Cellular regulation of polyamines involves a variety of complex mechanisms that regulate uptake and excretion as well as synthesis and catabolism of polyamines. A key enzyme in the biosynthesis of polyamines is ornithine decarboxylase (ODC). The activity and stability of this homodimeric protein is controlled by ODC antizyme (OAZ). OAZ binds ODC monomers and thereby targets them for ubiquitin-independent degradation by the proteasome. OAZ is encoded by an interrupted open reading frame. As a consequence, synthesis of the functional protein is slowed and only occurs when a ribosomal frameshift (RFS) event takes place. High polyamine concentrations lead to an increased efficiency of translation ofOAZmRNA. Our studies have revealed that nascent OAZ polypeptide causes a translational arrest of ribosomes when polyamine concentration is low. At higher concentrations, binding of polyamines to nascent OAZ prevents stalling of the ribosomes onOAZmRNA and thereby promotes synthesis of full-length ODC antizyme. Co-translational sensing of polyamines thereby contributes to a homeostatic regulation of polyamine biosynthesis.
登录
查看更多内容
DOI:
10.1042/bj2980485
发表时间:
1994
期刊:
The Biochemical journal
影响因子:
--
作者:
Thomas,TJ;Thomas,T
通讯作者:
Thomas,T
DOI:
10.1007/978-1-61779-034-8_1
发表时间:
2011
期刊:
Methods in molecular biology (Clifton, N.J.)
影响因子:
--
作者:
Pegg, Anthony E;Casero, Robert A Jr
通讯作者:
Casero, Robert A Jr
DOI:
10.1073/pnas.070055897
发表时间:
2000-04-25
影响因子:
11.1
作者:
Ivanov, IP;Rohrwasser, A;Atkins, JF
通讯作者:
Atkins, JF
DOI:
--
发表时间:
2004
期刊:
影响因子:
--
作者:
Matsufuji S
通讯作者:
Matsufuji S
影响因子:
4.8
作者:
Leroy, D;Heriche, JK;Cochet, C
通讯作者:
Cochet, C