Cited by 46Nicotinic Acetylcholine Receptors StudyNeuroscience and Neuropharmacology ResearchCellular transport and secretion

UBXD4, a UBX-Containing Protein, Regulates the Cell Surface Number and Stability of α3-Containing Nicotinic Acetylcholine Receptors

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Rezvani, Khosrow, Teng, Yanfen, Pan, Yaping, Dani, John A., Lindstrom, Jon, García Gras, Eduardo A., McIntosh, J. Michael, De Biasi, Mariella·2009·The Journal of Neuroscience

Abstract

Adaptor proteins are likely to modulate spatially and temporally the trafficking of a number of membrane proteins, including neuronal nicotinic acetylcholine receptors (nAChRs). A yeast two-hybrid screen identified a novel UBX-containing protein, UBXD4, as one of the cytosolic proteins that interact directly with the α3 and α4 nAChR subunits. The function of UBX-containing proteins is largely unknown. Immunoprecipitation and confocal microscopy confirmed the interaction of UBXD4 with α3-containing nAChRs (α3* nAChRs) expressed in HEK293 cells, PC12 cells, and rat cortical neurons. Overexpression of UBXD4 in differentiated PC12 cells (dPC12) increased nAChR cell surface expression, especially that of the α3β2 subtype. These findings were corroborated by electrophysiology, immunofluorescent staining, and biotinylation of surface receptors. Silencing of UBXD4 led to a significant reduction of α3* nAChRs in rat cortical neurons and dPC12 cells. Biochemical and immunofluorescence studies of endogenous UBXD4 showed that the protein is located in both the ER and cis-Golgi compartments. Our investigations also showed that the α3 subunit is ubiquitinated and that UBXD4 can interfere with its ubiquitination and consequent degradation by the proteasome. Our data suggest that UBXD4 modulates the distribution of α3* nAChRs between specialized intracellular compartments and the plasma membrane. This effect is achieved by controlling the stability of the α3 subunit and, consequently, the number of receptors at the cell surface.

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Crossref · 10.1523/jneurosci.4723-08.2009

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Authors
Rezvani, K., Teng, Y., Pan, Y., Dani, J. A., Lindstrom, J., García Gras, E. A., McIntosh, J. M., & De Biasi, M.
Affiliations
  • Baylor College of Medicine (US)
  • University of Pennsylvania (US)
  • University of Utah (US)
Venue
The Journal of Neuroscience
Published
2009-05-27
Volume
29
Issue
21
Pages
6883-6896
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2077314520
Cited by
46
References
100
Citations by year
2025: 1 · 2024: 1 · 2023: 2 · 2021: 2 · 2020: 1 · 2019: 3 · 2018: 1 · 2017: 2 · 2016: 4 · 2015: 9 · 2014: 5 · 2013: 6 · 2012: 2
FWCI
1.21
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Philip Morris International
  • National Institute of Mental Health (MH53631, R01MH053631, R29MH053631)
  • National Institute on Drug Abuse (R21DA024385, DA017173, R01DA017173, R01DA009411)
  • National Institute of Neurological Disorders and Stroke (R01NS021229)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nicotinic Acetylcholine Receptors Study
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
Keywords
nicotinic acetylcholine receptors, alpha3 subunit, receptor trafficking, cell surface expression, receptor stability, ubiquitination, proteasomal degradation, adaptor proteins, cis-Golgi, endoplasmic reticulum, cortical neurons, PC12 cells
MeSH terms
Animals, Cell Differentiation, Cell Membrane, Cells, Cultured, Cerebral Cortex, Embryo, Mammalian, Endoplasmic Reticulum, Golgi Apparatus, Humans, Leucyl Aminopeptidase, Male, Membrane Potentials, Membrane Proteins, Mice, Inbred C57BL, Mutation, Neurons, Protein Binding, Receptors, Nicotinic, Transfection, Ubiquitins, Up-Regulation, Patch-Clamp Techniques, Microscopy, Confocal, Biotinylation, Rats, Long-Evans, Two-Hybrid System Techniques, RNA, Small Interfering, Proteasome Endopeptidase Complex, Immunoprecipitation, Mice, Rats

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