Abstract
The very large G protein coupled receptor (Vlgr1) is a member of adhesion receptors or large N-terminal family B-7 transmembrane helixes (LNB7TM) receptors within the seven trans-membrane receptor superfamily. Vlgr1 is the largest GPCR identified to date; its mRNA spans 19 kb and encodes 6,300 amino acids. Vlgr1 is a core component of ankle-link complex in inner ear hair cells. Knock-out and mutation mouse models show that loss of Vlgr1 function leads to abnormal stereociliary development and hearing loss, indicating crucial roles of Vlgr1 in hearing transduction or auditory system development. Over the past 10 or so years, human genetics data suggested that Vlgr1 mutations cause Usher syndromes and seizures. Although significant progresses have been made, the details of Vlgr1’s function in hair cells, its signaling cascade, and the mechanisms underlying causative effects of Vlgr1 mutations in human diseases remain elusive and ask for further investigation.
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This work was supported by grants from the National Basic Research Program of China (973; 2012CB910402 to J.S., 2011CB504505 to Z.X.), National Natural Science Foundation of China (31070969 to Z.X. and 31100580, 31271505 to J.S.), Specialized Research Fund for the Doctoral Program of Higher Education (20100131110014 to Z.X.), Foundation for Excellent Young and Middle-Aged Scientists of Shandong Province, China (BS2011SW020 to J.S, BS2010SW017 to Z.X.), Interdiscipline Fund of Shandong University (2012JC021 to Z.X.), and Independence Innovation Foundation of Shandong University (2012TS114 to J.S.).
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Sun, JP., Li, R., Ren, HZ. et al. The Very Large G Protein Coupled Receptor (Vlgr1) in Hair Cells. J Mol Neurosci 50, 204–214 (2013). https://doi.org/10.1007/s12031-012-9911-5
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DOI: https://doi.org/10.1007/s12031-012-9911-5