Mapping and functional analysis of an instability element in phosphoenolpyruvate carboxykinase mRNA.

Mapping and functional analysis of an instability element in phosphoenolpyruvate carboxykinase mRNA.
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磷酸烯醇丙酮酸羧激酶 mRNA 中不稳定元件的定位和功能分析。

DOI:
10.1152/ajprenal.2000.279.5.f866
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发表时间:
2000
期刊:
American journal of physiology. Renal physiology
影响因子:
--
通讯作者:
Curthoys,NP
Curthoys,NP
中科院分区:
--
文献类型:
--
作者:
Laterza,OF;Taylor,L;Unnithan,S;Nguyen,L;Curthoys,NP

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磷酸烯醇式丙酮酸羧激酶(PEPCK)是肾脏疾病发生的关键调节酶。PEPCK mRNA的3′-非翻译区含有一个不稳定元件,该元件促进其快速转换并有助于PEPCK基因表达的调节。这些过程由特定的蛋白质结合元件介导。因此,RNA凝胶位移分析用于鉴定大鼠肾皮质胞质提取物中与PEPCK mRNA的3′-非翻译区结合的蛋白质。然后使用缺失构建体将结合相互作用映射到两个相邻的RNA区段(PEPCK-6和PEPCK-7)。然而,竞争实验证实,仅与PEPCK-7的结合是特异性的。通过克隆荧光素酶报告基因构建体pLuc/Zeo中的类似片段进行功能研究。该分析表明,PEPCK-6和PEPCK-7片段都是产生荧光素酶活性降低所必需的,其降低程度与用全长3′-非翻译区观察到的降低程度相当。因此,PEPCK-7片段结合特异性蛋白质,其可以募集一种或多种蛋白质以形成介导PEPCK mRNA快速衰变的复合物。
Phosphoenolpyruvate carboxykinase (PEPCK) is a key regulatory enzyme of renal gluconeogenesis. The 3′-nontranslated region of the PEPCK mRNA contains an instability element that facilitates its rapid turnover and contributes to the regulation of PEPCK gene expression. Such processes are mediated by specific protein-binding elements. Thus RNA gel shift analysis was used to identify proteins in rat renal cortical cytosolic extracts that bind to the 3′-nontranslated region of the PEPCK mRNA. Deletion constructs were then used to map the binding interactions to two adjacent RNA segments (PEPCK-6 and PEPCK-7). However, competition experiments established that only the binding to PEPCK-7 was specific. Functional studies were performed by cloning similar segments in a luciferase reporter construct, pLuc/Zeo. This analysis indicated that both PEPCK-6 and PEPCK-7 segments were necessary to produce a decrease in luciferase activity equivalent to that observed with the full-length 3′-nontranslated region. Thus the PEPCK-7 segment binds a specific protein that may recruit one or more proteins to form a complex that mediates the rapid decay of the PEPCK mRNA.
DOI: --
发表时间: 1984
期刊: The Journal of biological chemistry
影响因子: --
作者:
Sasaki,K;Cripe,TP;Koch,SR;Andreone,TL;Petersen,DD;Beale,EG;Granner,DK
通讯作者: Granner,DK
DOI: --
发表时间: 1993
期刊: European Journal of Biochemistry
影响因子: --
作者:
B. Christ;A. Nath
通讯作者: A. Nath
一种 cAMP 调节的 RNA 结合蛋白,与磷酸烯醇丙酮酸羧激酶 (GTP) mRNA 相互作用。
DOI: --
发表时间: 1993
影响因子: 4.8
作者:
N. Nachaliel;Deepak R Jain;Y. Hod
通讯作者: Y. Hod
磷酸烯醇丙酮酸羧激酶基因转录的多激素调节
DOI: 10.1111/j.1749-6632.1986.tb15530.x
发表时间: 1986
影响因子: 5.2
作者:
D. Granner;K. Sasaki;David T. W. Chu
通讯作者: David T. W. Chu
环 AMP 可稳定磷酸烯醇丙酮酸羧激酶 (GTP) 的 mRNA,防止降解。
DOI: --
发表时间: 1988
期刊: The Journal of biological chemistry
影响因子: --
作者:
Hod,Y;Hanson,RW
通讯作者: Hanson,RW