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- W2997484712 abstract "Aims: The protein degradation machinery plays a critical role in the maintenance of cellular homeostasis, preventing the accumulation of damaged or misfolded proteins and controlling the levels of regulatory proteins. The 20S proteasome degradation machinery, which predominates during oxidative stress, is able to cleave any protein with a partially unfolded region, however, uncontrolled degradation of the myriad of potential substrates is improbable. This study aimed to identify and characterize the regulatory mechanism that controls 20S proteasome-mediated degradation. Results: Using a bioinformatic screen based on known 20S proteasome regulators, we have discovered a novel family of 20S proteasome regulators, named catalytic core regulators (CCRs). These regulators share structural and sequence similarities, and coordinate the function of the 20S proteasome by affecting the degradation of substrates. The CCRs are involved in the oxidative stress response via Nrf2, organizing into a feed-forward loop regulatory circuit, with some members stabilizing Nrf2, others being induced by Nrf2, and all of them inhibiting the 20S proteasome. Innovation and Conclusion: These data uncover a new family of regulatory proteins that utilize a fine-tuned mechanism to carefully modulate the activity of the 20S proteasome, in particular under conditions of oxidative stress, ensuring its proper functioning by controlling the degradative flux." @default.
- W2997484712 created "2020-01-10" @default.
- W2997484712 creator A5002148508 @default.
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- W2997484712 creator A5068165719 @default.
- W2997484712 creator A5090399462 @default.
- W2997484712 date "2020-03-20" @default.
- W2997484712 modified "2023-09-26" @default.
- W2997484712 title "Regulation of the 20S Proteasome by a Novel Family of Inhibitory Proteins" @default.
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- W2997484712 doi "https://doi.org/10.1089/ars.2019.7816" @default.
- W2997484712 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/31903784" @default.
- W2997484712 hasPublicationYear "2020" @default.
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