Cited by 176Heat shock proteins researchUbiquitin and proteasome pathwaysEndoplasmic Reticulum Stress and Disease

Quality Control of Orphaned Proteins

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Juszkiewicz, Szymon, Hegde, Ramanujan S.·2018·Molecular Cell

Abstract

The billions of proteins inside a eukaryotic cell are organized among dozens of sub-cellular compartments, within which they are further organized into protein complexes. The maintenance of both levels of organization is crucial for normal cellular function. Newly made proteins that fail to be segregated to the correct compartment or assembled into the appropriate complex are defined as orphans. In this review, we discuss the challenges faced by a cell of minimizing orphaned proteins, the quality control systems that recognize orphans, and the consequences of excess orphans for protein homeostasis and disease.

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Crossref · 10.1016/j.molcel.2018.07.001

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  • Other RNA exosome subunits with reduced abundance by global proteomics had thermal stability largely unaffected, indicating their depletion may occur through mechanisms independent of protein destabilization, such as altered synthesis or degradation pathways including orphan protein decay.

    “In contrast, while other subunits of the RNA exosome exhibited reduced abundance by global proteomics, their thermal stability remained largely unaffected, indicating that their depletion may occur through mechanisms independent of protein destabilization, such as altered synthesis or degradation pathways that could include orphan protein decay89.”

    From EXOSC3 G191 Variants Trigger System-Wide Recalibration of RNA Processing Machinery (2026) · cites this paper as [89]

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Authors
Juszkiewicz, S., & Hegde, R. S.
Affiliations
MRC Laboratory of Molecular Biology (GB)
Corresponding author
Hegde, Ramanujan S.
Venue
Molecular Cell
Publisher
Elsevier BV
Published
2018-08
Volume
71
Issue
3
Pages
443-457
ISSN
1097-2765 (ISSN-L)
OpenAlex
W2886379694
Cited by
165
References
181
Citations by year
2026: 18 · 2025: 17 · 2024: 23 · 2023: 28 · 2022: 22 · 2021: 22 · 2020: 16 · 2019: 17 · 2018: 2
FWCI
1.44
Type
journal article
Language
en
Open access
Locations
  • Molecular Cell (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
Research Councils UK (MC_UP_A022_1007)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Heat shock proteins research
  • 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
Keywords
orphan proteins, protein quality control, protein complex formation, proteostasis, protein misfolding, disease
MeSH terms
Proteostasis, Proteins, Protein Biosynthesis, Protein Transport, Proteolysis

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