Luminal fluid reabsorption plays a fundamental role in male fertility. We demonstrated that the ubiquitous GPCR signaling proteins Gq and β-arrestin-1 are essential for fluid reabsorption because they mediate coupling between an orphan receptor ADGRG2 (GPR64) and the ion channel CFTR. A reduction in protein level or deficiency of ADGRG2, Gq or β-arrestin-1 in a mouse model led to an imbalance in pH homeostasis in the efferent ductules due to decreased constitutive CFTR currents. Efferent ductule dysfunction was rescued by the specific activation of another GPCR, AGTR2. Further mechanistic analysis revealed that β-arrestin-1 acts as a scaffold for ADGRG2/CFTR complex formation in apical membranes, whereas specific residues of ADGRG2 confer coupling specificity for different G protein subtypes, this specificity is critical for male fertility. Therefore, manipulation of the signaling components of the ADGRG2-Gq/β-arrestin-1/CFTR complex by small molecules may be an effective therapeutic strategy for male infertility.
Gq activity- and β-arrestin-1 scaffolding-mediated ADGRG2/CFTR coupling are required for male fertility
Dao-Lai Zhang,Yu-jing Sun,M. Ma,Yi-jing Wang,Hui Lin,Rui-rui Li,Zong-Lai Liang,Yuan Gao,Zhao-ya Yang,Dong-fang He,Amy Lin,Hui Mo,Yu-Jing Lu,Meng-jing Li,W. Kong,K. Chung,F. Yi,Jian-yuan Li,Yingying Qin,Jingxin Li,A. Thomsen,Alem W. Kahsai,Zi-Jiang Chen,Zhigang Xu,Mingyao Liu,Dali Li,Xiao Yu,Jin-peng Sun
Published 2018 in eLife
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- Publication year
2018
- Venue
eLife
- Publication date
2018-02-02
- Fields of study
Biology, Medicine, Chemistry
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Semantic Scholar, PubMed
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