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The Eukaryotic Proteome Is Shaped by E3 Ubiquitin Ligases Targeting C-Terminal Degrons
Open accessAbstract
Summary Degrons are minimal elements that mediate the interaction of proteins with degradation machineries to promote proteolysis. Despite their central role in proteostasis, the number of known degrons remains small and a facile technology to characterize them is lacking. Using a strategy combining Global Protein Stability (GPS) profiling with a synthetic human peptidome, we identify thousands of peptides containing degron activity. Using CRISPR screening, we established that the stability of many proteins is regulated through degrons located at their C-terminus. We characterize eight Cullin-RING E3 ubiquitin ligase (CRL) complexes adaptors that regulate C-terminal degrons including six CRL2 and two CRL4 complexes and computationally implicate multiple non-CRLs in end recognition. Human proteome analysis revealed that the C-termini of eukaryotic proteins are depleted for C-terminal degrons, suggesting an E3 ligase-dependent modulation of proteome composition. Thus, we propose that a series of ‘C-end rules’ operate to govern protein stability and shape the eukaryotic proteome.
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Metadata
- Authors
- Koren, I., Timms, R. T., Kula, T., Xu, Q., Li, M. Z., & Elledge, S. J.
- Venue
- Cell
- Publisher
- Elsevier BV
- Published
- 2018-06
- Volume
- 173
- Issue
- 7
- Pages
- 1622-1635.e14
- ISSN
- 0092-8674 (ISSN-L)
- OpenAlex
- W2805030993
- Cited by
- 323
- References
- 7
- FWCI
- 6.75
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Koren, I., Timms, R. T., Kula, T., Xu, Q., Li, M. Z., & Elledge, S. J. (2018). The Eukaryotic Proteome Is Shaped by E3 Ubiquitin Ligases Targeting C-Terminal Degrons. Cell. https://doi.org/10.1016/j.cell.2018.04.028
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