Cited by 66Ubiquitin and proteasome pathwaysAlzheimer's disease research and treatmentsAutophagy in Disease and Therapy

A novel brain-enriched E3 ubiquitin ligase RNF182 is up regulated in the brains of Alzheimer's patients and targets ATP6V0C for degradation

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Liu, Qing, Lei, Joy X, Sikorska, Marianna, Liu, Rugao·2008·Molecular Neurodegeneration

Abstract

BACKGROUND: Alterations in multiple cellular pathways contribute to the development of chronic neurodegeneration such as a sporadic Alzheimer's disease (AD). These, in turn, involve changes in gene expression, amongst which are genes regulating protein processing and turnover such as the components of the ubiquitin-proteosome system. Recently, we have identified a cDNA whose expression was altered in AD brains. It contained an open reading frame of 247 amino acids and represented a novel RING finger protein, RNF182. Here we examined its biochemical properties and putative role in brain cells. RESULTS: RNF182 is a low abundance cytoplasmic protein expressed preferentially in the brain. Its expression was elevated in post-mortem AD brain tissue and the gene could be up regulated in vitro in cultured neurons subjected to cell death-inducing injuries. Subsequently, we have established that RNF182 protein possessed an E3 ubiquitin ligase activity and stimulated the E2-dependent polyubiquitination in vitro. Yeast two-hybrid screening, overexpression and co-precipitation approaches revealed, both in vitro and in vivo, an interaction between RNF182 and ATP6V0C, known for its role in the formation of gap junction complexes and neurotransmitter release channels. The data indicated that RNF182 targeted ATP6V0C for degradation by the ubiquitin-proteosome pathway. Overexpression of RNF182 reduced cell viability and it would appear that by itself the gene can disrupt cellular homeostasis. CONCLUSION: Taken together, we have identified a novel brain-enriched RING finger E3 ligase, which was up regulated in AD brains and neuronal cells exposed to injurious insults. It interacted with ATP6V0C protein suggesting that it may play a very specific role in controlling the turnover of an essential component of neurotransmitter release machinery.

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  • Several CNS-specific E3 ligases have emerged, such as RNF182 and TRIM9.

    “several central nervous system (CNS)-specific E3 ligases have emerged, such as RNF182 (ref.148) and tripartite motif-containing protein 9 (TRIM9)149”

    From PROTAC targeted protein degraders: the past is prologue (2022) · cites this paper as [148]

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Authors
Liu, Q., Lei, J. X., Sikorska, M., & Liu, R.
Affiliations
  • University of Ottawa (CA)
  • Institute for Biological Sciences (CA)
  • University of North Dakota (US)
Corresponding author
Liu, Qing
Venue
Molecular Neurodegeneration
Published
2008
Volume
3
Issue
1
Pages
4
ISSN
1750-1326 (ISSN-L)
OpenAlex
W2041140379
Cited by
66
References
35
Citations by year
2026: 8 · 2025: 10 · 2024: 3 · 2023: 6 · 2022: 7 · 2021: 5 · 2020: 5 · 2019: 2 · 2018: 3 · 2016: 1 · 2015: 2 · 2014: 1 · 2013: 2 · 2012: 1
FWCI
1.37
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Molecular Neurodegeneration (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • NPARC (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
Keywords
E3 ubiquitin ligase, RING finger protein, Alzheimer's disease, ATP6V0C, ubiquitin-proteasome system, protein degradation, polyubiquitination, neuronal injury, gap junctions, neurotransmitter release, postmortem brain, neurodegeneration

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