HnRNP L represses cryptic exons.

HnRNP L represses cryptic exons.
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DOI:
10.1261/rna.065508.117
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发表时间:
2018-06
期刊:
RNA (New York, N.Y.)
影响因子:
--
通讯作者:
Ling JP
Ling JP
中科院分区:
其他
文献类型:
--
作者:
McClory SP;Lynch KW;Ling JP

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RNA剪接的保真度由剪接增强子和抑制子组成的网络来调节,尽管管理这一过程的规则尚未完全理解。一种有助于剪接保真度的机制是通过识别二核苷酸重复的剪接因子来抑制非保守的隐蔽外显子。我们先前发现,TDP-43和PTBP1/PTBP2分别能够利用UG和CU重复抑制隐蔽外显子。在这里,我们证明了hnRNP L(HNRNPL)也通过利用外显子CA重复来抑制隐蔽外显子,特别是在5‘SS附近。我们假设hnRNP L调节CA重复抑制,既有隐蔽的外显子抑制,也有发育过程,如T细胞分化。
The fidelity of RNA splicing is regulated by a network of splicing enhancers and repressors, although the rules that govern this process are not yet fully understood. One mechanism that contributes to splicing fidelity is the repression of nonconserved cryptic exons by splicing factors that recognize dinucleotide repeats. We previously identified that TDP-43 and PTBP1/PTBP2 are capable of repressing cryptic exons utilizing UG and CU repeats, respectively. Here we demonstrate that hnRNP L (HNRNPL) also represses cryptic exons by utilizing exonic CA repeats, particularly near the 5′SS. We hypothesize that hnRNP L regulates CA repeat repression for both cryptic exon repression and developmental processes such as T cell differentiation.
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