Profiling of 2'-O-Me in human rRNA reveals a subset of fractionally modified positions and provides evidence for ribosome heterogeneity.

Profiling of 2'-O-Me in human rRNA reveals a subset of fractionally modified positions and provides evidence for ribosome heterogeneity.
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在人rRNA中2'-O-ME的分析揭示了一部分部分修饰的位置,并提供了核糖体异质性的证据。

DOI:
10.1093/nar/gkw482
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发表时间:
2016-09-19
影响因子:
14.9
通讯作者:
Nielsen H
Nielsen H
中科院分区:
生物学2区
文献类型:
--
作者:
Krogh N;Jansson MD;Häfner SJ;Tehler D;Birkedal U;Christensen-Dalsgaard M;Lund AH;Nielsen H

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Ribose methylation is one of the two most abundant modifications in human ribosomal RNA and is believed to be important for ribosome biogenesis, mRNA selectivity and translational fidelity. We have applied RiboMeth-seq to rRNA from HeLa cells for ribosome-wide, quantitative mapping of 2′-O-Me sites and obtained a comprehensive set of 106 sites, including two novel sites, and with plausible box C/D guide RNAs assigned to all but three sites. We find approximately two-thirds of the sites to be fully methylated and the remainder to be fractionally modified in support of ribosome heterogeneity at the level of RNA modifications. A comparison to HCT116 cells reveals similar 2′-O-Me profiles with distinct differences at several sites. This study constitutes the first comprehensive mapping of 2′-O-Me sites in human rRNA using a high throughput sequencing approach. It establishes the existence of a core of constitutively methylated positions and a subset of variable, potentially regulatory positions, and paves the way for experimental analyses of the role of variations in rRNA methylation under different physiological or pathological settings.
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