MALAT1相關胞漿小RNA
MALAT1相關胞漿小RNA(mascRNA) | |
---|---|
預測的mascRNA的二級結構和保守序列 | |
識別符 | |
代號 | mascRNA-menRNA |
Rfam | RF01684 |
其他數據 | |
RNA類型 | Gene |
域 | Eukaryota |
MALAT1相關胞漿小RNA(英語:MALAT1-associated small cytoplasmic RNA,縮寫mascRNA)是一種在細胞質中發現的非編碼RNA,長約53–61nt,由MALAT1(一個長鏈非編碼RNA)的3′端經核糖核酸酶P酶切割形成5′端,再由核糖核酸酶Z切割出3′端,最後由CCA tRNA核苷酸轉移酶在3′端加上CCA三個鹼基後產生[1]。此RNA在人體許多組織中都有表現,在演化上保守,二級結構與tRNA(亦由核糖核酸酶P和Z前後切割產生)類似,都為三葉草形,但不會被胺醯化[1]。
mascRNA在細胞中並不穩定[1],其功能尚不清楚,有研究指其可調控轉譯[2]或影響腫瘤生長[3]。
另見
- NEAT1和MALAT1,都位於11號染色體
- MEN β RNA:另一種長非編碼RNA,長約20,000nt,其3′端序列與MALAT1的類似,亦可被核糖核酸酶P切割成長度相仿、結構與tRNA類似的小RNA[4]。
參考文獻
- ^ 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.