1. A phosphatidic acid-binding lncRNA SNHG9 facilitates LATS1 liquid–liquid phase separation to promote oncogenic YAP signaling
- Author
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Li, Rui-Hua, Tian, Tian, Ge, Qi-Wei, He, Xin-Yu, Shi, Cheng-Yu, Li, Jun-Hong, Zhang, Zhen, Liu, Fang-Zhou, Sang, Ling-Jie, Yang, Zuo-Zhen, Liu, Ya-Zhuo, Xiong, Yan, Yan, Qingfeng, Li, Xu, Ju, Huai-Qiang, Liu, Jian, Wang, Liang-Jing, Shao, Jian-Zhong, Wang, Wenqi, Zhou, Tianhua, and Lin, Aifu
- Subjects
Genetics ,Cancer ,Breast Cancer ,Biotechnology ,Aetiology ,2.1 Biological and endogenous factors ,Biological Phenomena ,Cell Line ,Tumor ,Cell Proliferation ,Hippo Signaling Pathway ,Humans ,Phosphatidic Acids ,Phosphoproteins ,Protein Serine-Threonine Kinases ,RNA ,Long Noncoding ,Signal Transduction ,YAP-Signaling Proteins ,Biochemistry and Cell Biology ,Clinical Sciences ,Developmental Biology - Abstract
Long noncoding RNAs (lncRNAs) are emerging as a new class of important regulators of signal transduction in tissue homeostasis and cancer development. Liquid-liquid phase separation (LLPS) occurs in a wide range of biological processes, while its role in signal transduction remains largely undeciphered. In this study, we uncovered a lipid-associated lncRNA, small nucleolar RNA host gene 9 (SNHG9) as a tumor-promoting lncRNA driving liquid droplet formation of Large Tumor Suppressor Kinase 1 (LATS1) and inhibiting the Hippo pathway. Mechanistically, SNHG9 and its associated phosphatidic acids (PA) interact with the C-terminal domain of LATS1, promoting LATS1 phase separation and inhibiting LATS1-mediated YAP phosphorylation. Loss of SNHG9 suppresses xenograft breast tumor growth. Clinically, expression of SNHG9 positively correlates with YAP activity and breast cancer progression. Taken together, our results uncover a novel regulatory role of a tumor-promoting lncRNA (i.e., SNHG9) in signal transduction and cancer development by facilitating the LLPS of a signaling kinase (i.e., LATS1).
- Published
- 2021