期刊
RNA
卷 21, 期 12, 页码 2023-2029出版社
COLD SPRING HARBOR LAB PRESS, PUBLICATIONS DEPT
DOI: 10.1261/rna.053058.115
关键词
paraspeckle; charged single alpha-helix; coiled coil; multimerization; structural modeling
资金
- Hungarian Scientific Research Fund (OTKA) [NF104198, K108437]
- European Union
- European Social Fund [TAMOP 4.2.1/B-11/2/KMR-2011-0004]
- [9876-1/2015/FEKUT]
Paraspeckles are subnuclear particles involved in the regulation of mRNA expression. They are formed by the association of DBHS family proteins and the NEAT1 long noncoding RNA. Here, we show that a recently identified structural motif, the charged single alpha-helix, is largely conserved in the DBHS family. Based on the available structural data and a previously suggested multimerization scheme of DBHS proteins, we built a structural model of a (PSPC1/NONO)(n) multimer that might have relevance in paraspeckle formation. Our model contains an extended coiled-coil region that is followed by and partially overlaps with the predicted charged single alpha-helix. We suggest that the charged single a-helix can act as an elastic ruler governing the exact positioning of the dimeric core structures relative to each other during paraspeckle assembly along the NEAT1 noncoding RNA.
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