MALAT1相关胞浆小RNA
外观
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MALAT1相关胞浆小RNA(mascRNA) | |
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预测的mascRNA的二级结构和保守序列 | |
识别符 | |
代号 | mascRNA-menRNA |
Rfam | RF01684 |
其他数据 | |
RNA类型 | Gene |
域 | Eukaryota |
MALAT1相关胞浆小RNA(英语:MALAT1-associated small cytoplasmic RNA,缩写mascRNA)是一种在细胞质中发现的非编码RNA,长约53–61nt,由MALAT1(一个长链非编码RNA)的3′端经核糖核酸酶P酶切割形成5′端,再由核糖核酸酶Z切割出3′端,最后由CCA tRNA核苷酸转移酶在3′端加上CCA三个碱基后产生[1]。此RNA在人体许多组织中都有表现,在演化上保守,二级结构与tRNA(亦由核糖核酸酶P和Z前后切割产生)类似,都为三叶草形,但不会被胺酰化[1]。
mascRNA在细胞中并不稳定[1],其功能尚不清楚,有研究指其可调控转译[2]或影响肿瘤生长[3]。
另见
[编辑]- NEAT1和MALAT1,都位于11号染色体
- MEN β RNA:另一种长非编码RNA,长约20,000nt,其3′端序列与MALAT1的类似,亦可被核糖核酸酶P切割成长度相仿、结构与tRNA类似的小RNA[4]。
参考文献
[编辑]- ^ 1.0 1.1 1.2 Wilusz JE, Freier SM, Spector DL. 3′ end processing of a long nuclear-retained noncoding RNA yields a tRNA-like cytoplasmic RNA.. Cell. 2008, 135 (5): 919–932. PMC 2722846
. PMID 19041754. doi:10.1016/j.cell.2008.10.012.
- ^ Lu X, Huang J, Wu S, Zheng Q, Liu P, Feng H; et al. The tRNA-like small noncoding RNA mascRNA promotes global protein translation.. EMBO Rep. 2020, 21 (12): e49684. PMC 7726780
. PMID 33073493. doi:10.15252/embr.201949684.
- ^ Xie SJ, Diao LT, Cai N, Zhang LT, Xiang S, Jia CC; et al. mascRNA and its parent lncRNA MALAT1 promote proliferation and metastasis of hepatocellular carcinoma cells by activating ERK/MAPK signaling pathway.. Cell Death Discov. 2021, 7 (1): 110. PMC 8128908
. PMID 34001866. doi:10.1038/s41420-021-00497-x.
- ^ Sunwoo H, Dinger ME, Wilusz JE, Amaral PP, Mattick JS, Spector DL. MEN epsilon/beta nuclear-retained non-coding RNAs are up-regulated upon muscle differentiation and are essential components of paraspeckles. Genome Res. 2009, 19 (3): 347–359. PMC 2661813
. PMID 19106332. doi:10.1101/gr.087775.108.