Architectural RNAs for Membraneless Nuclear Body Formation
- 1Institute for Genetic Medicine, Hokkaido University, Sapporo, 060-0815 Japan
- 2Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo, 060-0812 Japan
- Correspondence: hirose{at}igm.hokudai.ac.jp
Abstract
Long noncoding RNAs (lncRNAs) are fundamental regulators of various cellular processes. A subset of lncRNAs, termed architectural RNAs (arcRNAs), function in the formation and maintenance of phase-separated membraneless organelles in multiple eukaryotic species. These membraneless organelles represent an important type of compartmentalization in the crowded cellular environment and have several distinct features. The NEAT1_2 lncRNA is a well-characterized arcRNA that functions as an essential scaffold of paraspeckle nuclear bodies. Here, we describe the biogenesis of paraspeckles on arcRNAs through phase separation, focusing on the specific functions of multiple NEAT1_2 RNA domains and their partner RNA-binding proteins. Finally, we present an updated model of paraspeckle formation and discuss future perspectives of research into arcRNA-instructed architectures of phase-separated nuclear bodies.
- © 2019 Yamazaki et al.; Published by Cold Spring Harbor Laboratory Press
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