Cited by 47Ubiquitin and proteasome pathwaysEndoplasmic Reticulum Stress and DiseaseHeat shock proteins research

Involvement of the p97-Ufd1-Npl4 Complex in the Regulated Endoplasmic Reticulum-associated Degradation of Inositol 1,4,5-Trisphosphate Receptors

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Alzayady, Kamil J., Panning, Margaret M., Kelley, Grant G., Richard Wojcikiewicz, J.H.·2005·Journal of Biological Chemistry

Abstract

Inositol 1,4,5-trisphosphate (IP(3)) receptors form tetrameric, IP(3)-gated channels in endoplasmic reticulum membranes that govern the release of Ca(2+) from this organelle. In response to activation of certain G protein-coupled receptors that persistently elevate IP(3) concentration, IP(3) receptors are ubiquitinated and degraded by the ubiquitin-proteasome pathway. IP(3) receptor ubiquitination is mediated by the ubiquitin-conjugating enzyme, (mam)Ubc7, a component of the endoplasmic reticulum-associated degradation pathway. However, the mechanism by which ubiquitinated IP(3) receptors are transferred to the proteasome is not known. Here, we examine this process and show in several mammalian cell types that the ATPase p97 associates with IP(3) receptors in response to hormonal stimuli that induce IP(3) receptor ubiquitination. To examine the functional relevance of the p97 interaction with IP(3) receptors, we stably and specifically reduced p97 protein levels by 62 +/- 3% in Rat-1 fibroblasts using RNA interference. In these cells, endothelin-1-induced IP(3) receptor degradation was markedly retarded and the accumulation of ubiquitinated IP(3) receptors was markedly enhanced. These effects were reversed by expression of exogenous p97. In addition, Ufd1 and Npl4, which complex with p97, also associated with IP(3) receptors upon hormonal stimulation. We conclude that the p97-Ufd1-Npl4 complex couples ubiquitinated IP(3) receptors to proteasomal degradation and, thus, plays a…

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Crossref · 10.1074/jbc.m508890200

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Authors
Alzayady, K. J., Panning, M. M., Kelley, G. G., & Richard Wojcikiewicz, J. H.
Affiliations
SUNY Upstate Medical University (US)
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2005-10
Volume
280
Issue
41
Pages
34530-34537
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2044025216
Cited by
47
References
67
Citations by year
2025: 1 · 2024: 1 · 2021: 1 · 2020: 1 · 2019: 1 · 2018: 1 · 2017: 2 · 2016: 3 · 2015: 1 · 2013: 2 · 2012: 2
FWCI
1.89
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute of Diabetes and Digestive and Kidney Diseases (DK 49194, R01DK056294, R29DK049194, DK 56294, R01DK049194)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Endoplasmic Reticulum Stress and Disease
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Heat shock proteins research
Keywords
VCP, Ufd1, Npl4, IP3 receptor, ER-associated degradation, ubiquitin-proteasome system, receptor ubiquitination, proteasomal degradation, endothelin-1, calcium release, G protein-coupled receptor signaling
MeSH terms
Adenosine Triphosphatases, Animals, Calcium, Carrier Proteins, Cell Line, Cytosol, Electrophoresis, Polyacrylamide Gel, Endoplasmic Reticulum, Fibroblasts, Nuclear Proteins, Proteins, Subcellular Fractions, Time Factors, Calcium Channels, Down-Regulation, DNA, Complementary, Receptors, Cytoplasmic and Nuclear, Cell Cycle Proteins, Ubiquitin, RNA Interference, Intercellular Signaling Peptides and Proteins, Ubiquitin-Conjugating Enzymes, Immunoprecipitation, Intracellular Signaling Peptides and Proteins, Mice, Rats, Inositol 1,4,5-Trisphosphate Receptors

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