Functional elements of the cis-regulatory lincRNA-p21

被引:27
作者
Winkler, Lauren [1 ]
Jimenez, Maria [1 ]
Zimmer, Joshua T. [2 ,3 ]
Williams, Adam [4 ]
Simon, Matthew D. [2 ,3 ]
Dimitrova, Nadya [1 ]
机构
[1] Yale Univ, Dept Mol Cellular & Dev Biol, New Haven, CT 06511 USA
[2] Yale Univ, Dept Mol Biophys & Biochem, New Haven, CT 06511 USA
[3] Yale Univ, Inst Biomol Design & Discovery, West Haven, CT 06516 USA
[4] Jackson Lab Genom Med, Farmington, CT 06032 USA
关键词
NONCODING RNAS; TRANSCRIPTION; ENHANCER; LNCRNA; COMPARTMENTALIZATION; RECRUITMENT; EXPRESSION; REVEALS; DNA;
D O I
10.1016/j.celrep.2022.110687
中图分类号
Q2 [细胞生物学];
学科分类号
071009 ; 090102 ;
摘要
The p53-induced long noncoding RNA (lncRNA) lincRNA-p21 is proposed to act in cis to promote p53-dependent expression of the neighboring cell cycle gene, Cdkn1a/p21. The molecular mechanism through which the transcribed lincRNA-p21 regulatory locus activates p21 expression remains poorly understood. To elucidate the functional elements of cis-regulation, we generate a series of genetic models that disrupt DNA regulatory elements, the transcription of lincRNA-p21, or the accumulation of mature lincRNA-p21. Unexpectedly, we determine that full-length transcription, splicing, and accumulation of lincRNA-p21 are dispensable for the chromatin organization of the locus and for cis-regulation. Instead, we find that production of lincRNA-p21 through conserved regions in exon 1 of lincRNA-p21 promotes cis-activation. These findings demonstrate that the activation of nascent transcription from this lncRNA locus, but not the generation or accumulation of a mature lncRNA transcript, is necessary to enact local gene expression control.
引用
收藏
页数:14
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