Functions and mechanisms of spliceosomal small nuclear RNA pseudouridylation.

Functions and mechanisms of spliceosomal small nuclear RNA pseudouridylation.
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DOI:
10.1002/wrna.77
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发表时间:
2011-07
影响因子:
7.3
通讯作者:
Yu, Yi-Tao
Yu, Yi-Tao
中科院分区:
生物学2区
文献类型:
--
作者:
Wu, Guowei;Yu, Andrew T.;Kantartzis, Athena;Yu, Yi-Tao

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假尿苷是剪接体小核 RNA (snRNA) 中最丰富且高度保守的修饰核苷酸。大多数假尿苷也聚集在剪接体 snRNA 的功能重要区域。在几个独立的实验系统中进行的实验表明,剪接体 snRNA 中的假尿苷对于前信使 RNA (mRNA) 剪接具有重要的功能。实验数据还表明,剪接体 snRNA 假尿苷化可以通过 RNA 依赖性(盒·H/ACA RNP)和 RNA 独立(仅蛋白质酶)机制催化。
Pseudouridines are the most abundant and highly conserved modified nucleotides identified in spliceosomal small nuclear RNAs (snRNAs). Most pseudouridines are also clustered in functionally important regions of spliceosomal snRNAs. Experiments carried out in several independent experimental systems show that the pseudouridines in spliceosomal snRNAs are functionally important for pre-messenger RNA (mRNA) splicing. Experimental data also indicate that spliceosomal snRNA pseudouridylation can be catalyzed by both RNA-dependent (box •H/ACA RNPs) and RNA-independent (protein-only enzymes) mechanisms.
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