» Articles » PMID: 30698747

ARGLU1 is a Transcriptional Coactivator and Splicing Regulator Important for Stress Hormone Signaling and Development

Abstract

Stress hormones bind and activate the glucocorticoid receptor (GR) in many tissues including the brain. We identified arginine and glutamate rich 1 (ARGLU1) in a screen for new modulators of glucocorticoid signaling in the CNS. Biochemical studies show that the glutamate rich C-terminus of ARGLU1 coactivates multiple nuclear receptors including the glucocorticoid receptor (GR) and the arginine rich N-terminus interacts with splicing factors and binds to RNA. RNA-seq of neural cells depleted of ARGLU1 revealed significant changes in the expression and alternative splicing of distinct genes involved in neurogenesis. Loss of ARGLU1 is embryonic lethal in mice, and knockdown in zebrafish causes neurodevelopmental and heart defects. Treatment with dexamethasone, a GR activator, also induces changes in the pattern of alternatively spliced genes, many of which were lost when ARGLU1 was absent. Importantly, the genes found to be alternatively spliced in response to glucocorticoid treatment were distinct from those under transcriptional control by GR, suggesting an additional mechanism of glucocorticoid action is present in neural cells. Our results thus show that ARGLU1 is a novel factor for embryonic development that modulates basal transcription and alternative splicing in neural cells with consequences for glucocorticoid signaling.

Citing Articles

ARGLU1 enhances promoter-proximal pausing of RNA polymerase II and stimulates DNA damage repair.

Bachus S, Akkerman N, Fulham L, Graves D, Helwer R, Rempel J Nucleic Acids Res. 2024; 52(10):5658-5675.

PMID: 38520408 PMC: 11162773. DOI: 10.1093/nar/gkae208.


Proximity labeling reveals dynamic changes in the SQSTM1 protein network.

Ortiz A, Zhang L, Ash P, Basu A, Puri S, van der Spek S bioRxiv. 2024; .

PMID: 38168279 PMC: 10760047. DOI: 10.1101/2023.12.12.571324.


Molecular characteristics and clinical implications of serine/arginine-rich splicing factors in human cancer.

Zhang J, Fang Z, Song C Aging (Albany NY). 2023; 15(22):13287-13311.

PMID: 38015716 PMC: 10713412. DOI: 10.18632/aging.205241.


Single-Cell RNA Sequencing of Coronary Perivascular Adipose Tissue From End-Stage Heart Failure Patients Identifies Macrophage Subpopulation as a Target for Alleviating Fibrosis.

Fu M, Shu S, Peng Z, Liu X, Chen X, Zeng Z Arterioscler Thromb Vasc Biol. 2023; 43(11):2143-2164.

PMID: 37706320 PMC: 10597444. DOI: 10.1161/ATVBAHA.123.319828.


Deletion of ARGLU1 causes global defects in alternative splicing in vivo and mouse cortical malformations primarily via apoptosis.

Yao F, Huang S, Liu J, Tan C, Xu M, Wang D Cell Death Dis. 2023; 14(8):543.

PMID: 37612280 PMC: 10447433. DOI: 10.1038/s41419-023-06071-w.


References
1.
Auboeuf D, Batsche E, Dutertre M, Muchardt C, OMalley B . Coregulators: transducing signal from transcription to alternative splicing. Trends Endocrinol Metab. 2007; 18(3):122-9. DOI: 10.1016/j.tem.2007.02.003. View

2.
Bhat-Nakshatri P, Song E, Collins N, Uversky V, Dunker A, OMalley B . Interplay between estrogen receptor and AKT in estradiol-induced alternative splicing. BMC Med Genomics. 2013; 6:21. PMC: 3687557. DOI: 10.1186/1755-8794-6-21. View

3.
Iwasaki T, Chin W, Ko L . Identification and characterization of RRM-containing coactivator activator (CoAA) as TRBP-interacting protein, and its splice variant as a coactivator modulator (CoAM). J Biol Chem. 2001; 276(36):33375-83. DOI: 10.1074/jbc.M101517200. View

4.
Kadmiel M, Cidlowski J . Glucocorticoid receptor signaling in health and disease. Trends Pharmacol Sci. 2013; 34(9):518-30. PMC: 3951203. DOI: 10.1016/j.tips.2013.07.003. View

5.
Zhang C, Dowd D, Staal A, Gu C, Lian J, van Wijnen A . Nuclear coactivator-62 kDa/Ski-interacting protein is a nuclear matrix-associated coactivator that may couple vitamin D receptor-mediated transcription and RNA splicing. J Biol Chem. 2003; 278(37):35325-36. DOI: 10.1074/jbc.M305191200. View