ArticleJournal of proteome research2012
Peptidomic analysis of HEK293T cells: effect of the proteasome inhibitor epoxomicin on intracellular peptides.
Article in Journal of proteome research, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers, 1 of them a synthesis that pooled it.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
31 citing papers in PubMed, 1 synthesis or guideline pooled it, 62 citations in OpenAlex.
- Limitations of Mass Spectrometry-Based Peptidomic Approaches.Journal of the American Society for Mass Spectrometry · 2015Pooled it
- Neuropeptidomics of Genetically Defined Cell Types in Mouse Brain.Methods in molecular biology (Clifton, N.J.) · 2024Article
- Quantitative Peptidomics: General Considerations.Methods in molecular biology (Clifton, N.J.) · 2024Article
- Effect of FKBP12-Derived Intracellular Peptides on Rapamycin-Induced FKBP-FRB Interaction and Autophagy.Cells · 2022Article
- New Intracellular Peptide Derived from Hemoglobin Alpha Chain Induces Glucose Uptake and Reduces Blood Glycemia.Pharmaceutics · 2021Article
- Peptidome: Chaos or Inevitability.International journal of molecular sciences · 2021Review
- Identification of Low Molecular Weight Proteins and Peptides fromBiomolecules · 2021Article
- Thimet Oligopeptidase Biochemical and Biological Significances: Past, Present, and Future Directions.Biomolecules · 2020Review
- Peptides from Natural or Rationally Designed Sources Can Be Used in Overweight, Obesity, and Type 2 Diabetes Therapies.Molecules (Basel, Switzerland) · 2020Review
- Discovery of Missing Methylation Sites on Endogenous Peptides of Human Cell Lines.Journal of the American Society for Mass Spectrometry · 2019Article
- Thimet Oligopeptidase (EC 3.4.24.15) Key Functions Suggested by Knockout Mice Phenotype Characterization.Biomolecules · 2019Article
- Effect of Protein Denaturation and Enzyme Inhibitors on Proteasomal-Mediated Production of Peptides in Human Embryonic Kidney Cells.Biomolecules · 2019Article
- Intracellular Peptides in Cell Biology and Pharmacology.Biomolecules · 2019Review
- Quantitative peptidomics of endogenous peptides involved in TGF-β1-induced epithelial mesenchymal transition of renal epithelial cells.Cell death discovery · 2018Article
- Review
- Quantitative Peptidomics with Five-plex Reductive Methylation labels.Journal of the American Society for Mass Spectrometry · 2018Article
- Characterization of the Ovarian Tumor Peptidome.Vitamins and hormones · 2018Article
- Proteasome inhibitors bortezomib and carfilzomib used for the treatment of multiple myeloma do not inhibit the serine protease HtrA2/Omi.Toxicology research · 2016Article
- Proteasome inhibitors, including curcumin, improve pancreatic β-cell function and insulin sensitivity in diabetic mice.Nutrition & diabetes · 2016Article
- 18O-Tracer Metabolomics Reveals Protein Turnover and CDP-Choline Cycle Activity in Differentiating 3T3-L1 Pre-Adipocytes.PloS one · 2016Article
Corrections and comments
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Authors and funding
5 authors at 3 institutions in 2 countries.
Funding
Abstract
Peptides derived from cytosolic, mitochondrial, and nuclear proteins have been detected in extracts of animal tissues and cell lines. To test whether the proteasome is involved in their formation, HEK293T cells were treated with epoxomicin (0.2 or 2 μM) for 1 h and quantitative peptidomics analysis was performed. Altogether, 147 unique peptides were identified by mass spectrometry sequence analysis. Epoxomicin treatment decreased the levels of the majority of intracellular peptides, consistent with inhibition of the proteasome beta-2 and beta-5 subunits. Treatment with the higher concentration of epoxomicin elevated the levels of some peptides. Most of the elevated peptides resulted from cleavages at acidic residues, suggesting that epoxomicin increased the processing of proteins through the beta-1 subunit. Interestingly, some of the peptides that were elevated by the epoxomicin treatment had hydrophobic residues in P1 cleavage sites. Taken together, these findings suggest that, while the proteasome is the major source of intracellular peptides, other peptide-generating mechanisms exist. Because intracellular peptides are likely to perform intracellular functions, studies using proteasome inhibitors need to be interpreted with caution, as it is possible that the effects of these inhibitors are due to a change in the peptide levels rather than inhibition of protein degradation.
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What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.