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RNA secondary structures located in the interchromosomal region of human ACAT1 chimeric mRNA are required to produce the 56-kDa isoform | |
2008 | |
发表期刊 | CELL RESEARCH (IF:28.1[JCR-2023],36.4[5-Year]) |
ISSN | 1001-0602 |
EISSN | 1748-7838 |
卷号 | 18期号:9页码:921-936 |
发表状态 | 已发表 |
DOI | 10.1038/cr.2008.66 |
摘要 | processing of two discontinuous RNAs transcribed from chromosomes 1 and 7. The chimeric mRNA uses AUG(1397-1399) and GGC(1274-1276) as translation initiation codons to produce normal 50-kDa ACAT1 and a novel enzymatically active 56-kDa isoform, respectively, with the latter being authentically present in human cells, including human monocyte-derived macrophages. In this work, we report that RNA secondary structures located in the vicinity of the GGC(1274-1276) codon are required for production of the 56-kDa isoform. The effects of the three predicted stem-loops (nt 1255-1268, 1286-1342 and 1355-1384) were tested individually by transfecting expression plasmids into cells that contained the wild-type, deleted or mutant stem-loop sequences linked to a partial ACAT1 AUG open reading frame (ORF) or to the ORFs of other genes. The expression patterns were monitored by western blot analyses. We found that the upstream stem-loop(1255-1268) from chromosome 7 and downstream stem-loop(1286-1342) from chromosome 1 were needed for production of the 56-kDa isoform, whereas the last stem-loop(1355-1384) from chromosome 1 was dispensable. The results of experiments using both monocistronic and bicistronic vectors with a stable hairpin showed that translation initiation from the GGC(1274-1276) codon was mediated by an internal ribosome entry site (IRES). Further experiments revealed that translation initiation from the GGC(1274-1276) codon requires the upstream AU-constituted RNA secondary structure and the downstream GC-rich structure. This mechanistic work provides further support for the biological significance of the chimeric nature of the human ACAT1 transcript. |
关键词 | human ACAT1 isoform chimeric human ACAT1 mRNA interchromosomal region RNA secondary structure internal ribosome entry site |
URL | 查看原文 |
收录类别 | SCI |
WOS研究方向 | Cell Biology |
WOS类目 | Cell Biology |
WOS记录号 | WOS:000259891200004 |
WOS关键词 | A-CHOLESTEROL ACYLTRANSFERASE ; INTERNAL RIBOSOMAL ENTRY ; 2 DIFFERENT CHROMOSOMES ; ACYL-COENZYME ; TRANSLATION INITIATION ; BINDING-PROTEIN ; GENE-EXPRESSION ; HEPATITIS-C ; IN-VITRO ; VIRUS |
原始文献类型 | Article |
引用统计 | 正在获取...
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文献类型 | 期刊论文 |
条目标识符 | https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/120384 |
专题 | 个人在本单位外知识产出 |
共同第一作者 | Zhao, Xiao-Nan |
通讯作者 | Li, Bo-Liang |
作者单位 | 1.Chinese Acad Sci, Shanghai Inst Biol Sci, State Key Lab Mol Biol, Inst Biochem & Cell Biol, Shanghai 200031, Peoples R China 2.Dartmouth Med Sch, Dept Biochem, Hanover, NH 03756 USA |
推荐引用方式 GB/T 7714 | Chen, Jia,Zhao, Xiao-Nan,Yang, Li,et al. RNA secondary structures located in the interchromosomal region of human ACAT1 chimeric mRNA are required to produce the 56-kDa isoform[J]. CELL RESEARCH,2008,18(9):921-936. |
APA | Chen, Jia.,Zhao, Xiao-Nan.,Yang, Li.,Hu, Guang-Jing.,Lu, Ming.,...&Li, Bo-Liang.(2008).RNA secondary structures located in the interchromosomal region of human ACAT1 chimeric mRNA are required to produce the 56-kDa isoform.CELL RESEARCH,18(9),921-936. |
MLA | Chen, Jia,et al."RNA secondary structures located in the interchromosomal region of human ACAT1 chimeric mRNA are required to produce the 56-kDa isoform".CELL RESEARCH 18.9(2008):921-936. |
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