The optional long 5'-untranslated region of human ACAT1 mRNAs impairs the production of ACAT1 protein by promoting its mRNA decay.
The optional long 5'-untranslated region of human ACAT1 mRNAs impairs the production of ACAT1 protein by promoting its mRNA decay.
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人 ACAT1 mRNA 的可选长 5'-非翻译区通过促进其 mRNA 衰减来损害 ACAT1 蛋白的产生。
DOI:
10.1093/abbs/gmn004
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发表时间:
2009
影响因子:
3.7
通讯作者:
中科院分区:
文献类型:
--
作者:
We have previously reported that human ACAT1 mRNAs produce the 50 kDa protein using the AUG(11397-1399) initiation codon, and also a minor 56 kDa isoform using the upstream in-frame GGC(1274-1276) initiation codon. The GGC(1274-1276) codon is located at the optional long 5'-untranslated region (5'-UTR, nt 1-1396) of the mRNAs. The DNA sequences corresponding to this 5'-UTR are located in two different chromosomes, 7 and 1. In the current work, we report that the optional long 5'-UTR significantly impairs the production of human ACAT1 protein initiated from the AUG(1397-1399)codon, mainly by promoting its mRNA decay. The western blot analyses indicated that the optional long 5'-UTR potently impaired the production of different proteins initiated from the AUG(1397-1399) codon, meaning that this impairing effect was not influenced by the 3'-UTR or the coding sequence of ACAT1 mRNA. The results of reverse transcription-quantitative polymerase chain reaction demonstrated that this 5'- UTR dramatically reduced the contents of its linked mRNAs. Analyses of the protein to mRNA ratios showed that this 5'-UTR mainly decreased its mRNA stability rather than altering its translational efficiency. We next performed the plasmid transfection experiments and used actinomycin D to inhibit transcription. The results showed that this 5'-UTR promoted its mRNA decay. Additional transfection and nucleofection experiments using RNAs prepared in vitro illustrated that, in both the cytoplasm and the nucleus of cells, the optional long 5'-UTR-linked mRNAs decayed faster than those without the link. Overall, our study brings new insight to the regulation of the human ACAT1 gene expression at the post-transcription level.
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影响因子:
44.1
作者:
通讯作者:
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影响因子:
16.2
作者:
B. Hutter-Paier;H. Huttunen;L. Puglielli;C. Eckman;Doo Yeon Kim;A. Hofmeister;R. Moir;Sarah B. Domnitz;M. Frosch;M. Windisch;D. Kovacs
通讯作者:
B. Hutter-Paier;H. Huttunen;L. Puglielli;C. Eckman;Doo Yeon Kim;A. Hofmeister;R. Moir;Sarah B. Domnitz;M. Frosch;M. Windisch;D. Kovacs
DOI:
10.1016/s0021-9258(19)36846-2
发表时间:
1993-10
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
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通讯作者:
C. Chang;H. Huh;K. Cadigan;Ta-Yuan Chang
DOI:
10.1074/jbc.270.49.29532
发表时间:
1995-12
期刊:
The Journal of Biological Chemistry
影响因子:
--
作者:
Chang Catherine C. Y.;Jun Chen;Matthew A. Thomas;D. Cheng;Del Priore Veronica A.;R. Newton;M. Pape;Ta-Yuan Chang
通讯作者:
Chang Catherine C. Y.;Jun Chen;Matthew A. Thomas;D. Cheng;Del Priore Veronica A.;R. Newton;M. Pape;Ta-Yuan Chang
影响因子:
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作者:
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通讯作者:
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