Structure of noncoding RNA is a determinant of function of RNA binding proteins in transcriptional regulation

Cell & Bioscience

Riki Kurokawa¹  Takanori Oyoshi² 

[1] Division of Gene Structure and Function Research Center for Genomic Medicine Saitama Medical University, 1397-1 Yamane, Hidaka-shi, Saitama-Ken, Japan, Mail code 350-1241;Department of Chemistry, Faculty of Science, Graduate School of Science, Shizuoka University, 836 Oya, Suruga, Shizuoka 422-8529, Japan

关键词: TERRA;    G-quadruplex;    B2 RNA;    TLS;    EWS;    noncoding RNA;   

Others  :  793689
DOI  :  10.1186/2045-3701-2-1

 received in 2011-09-06, accepted in 2012-01-03,  发布年份 2012

【 摘 要 】

The majority of the noncoding regions of mammalian genomes have been found to be transcribed to generate noncoding RNAs (ncRNAs), resulting in intense interest in their biological roles. During the past decade, numerous ncRNAs and aptamers have been identified as regulators of transcription. 6S RNA, first described as a ncRNA in E. coli, mimics an open promoter structure, which has a large bulge with two hairpin/stalk structures that regulate transcription through interactions with RNA polymerase. B2 RNA, which has stem-loops and unstructured single-stranded regions, represses transcription of mRNA in response to various stresses, including heat shock in mouse cells. The interaction of TLS (translocated in liposarcoma) with CBP/p300 was induced by ncRNAs that bind to TLS, and this in turn results in inhibition of CBP/p300 histone acetyltransferase (HAT) activity in human cells. Transcription regulator EWS (Ewing's sarcoma), which is highly related to TLS, and TLS specifically bind to G-quadruplex structures in vitro. The carboxy terminus containing the Arg-Gly-Gly (RGG) repeat domains in these proteins are necessary for cis-repression of transcription activation and HAT activity by the N-terminal glutamine-rich domain. Especially, the RGG domain in the carboxy terminus of EWS is important for the G-quadruplex specific binding. Together, these data suggest that functions of EWS and TLS are modulated by specific structures of ncRNAs.

【 授权许可】

   
2012 Oyoshi and Kurokawa; licensee BioMed Central Ltd.

【 图 表 】

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