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Iyer-Bierhoff A, Wieczorek M, Peter SM, Ward D, Bens M, Vettorazzi S, Guehrs KH, Tuckermann JP, Heinzel T. Acetylation-induced proteasomal degradation of the activated glucocorticoid receptor limits hormonal signaling. iScience 2024; 27:108943. [PMID: 38333702 PMCID: PMC10850750 DOI: 10.1016/j.isci.2024.108943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 11/30/2023] [Accepted: 01/15/2024] [Indexed: 02/10/2024] Open
Abstract
Glucocorticoid (GC) signaling is essential for mounting a stress response, however, chronic stress or prolonged GC therapy downregulates the GC receptor (GR), leading to GC resistance. Regulatory mechanisms that refine this equilibrium are not well understood. Here, we identify seven lysine acetylation sites in the amino terminal domain of GR, with lysine 154 (Lys154) in the AF-1 region being the dominant acetyl-acceptor. GR-Lys154 acetylation is mediated by p300/CBP in the nucleus in an agonist-dependent manner and correlates with transcriptional activity. Deacetylation by NAD+-dependent SIRT1 facilitates dynamic regulation of this mark. Notably, agonist-binding to both wild-type GR and an acetylation-deficient mutant elicits similar short-term target gene expression. In contrast, upon extended treatment, the polyubiquitination of the acetylation-deficient GR mutant is impaired resulting in higher protein stability, increased chromatin association and prolonged transactivation. Taken together, reversible acetylation fine-tunes duration of the GC response by regulating proteasomal degradation of activated GR.
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Affiliation(s)
- Aishwarya Iyer-Bierhoff
- Institute of Biochemistry and Biophysics, Centre for Molecular Biomedicine (CMB), Friedrich Schiller University, Hans-Knoell-Strasse 2, 07745 Jena, Germany
| | - Martin Wieczorek
- Institute of Biochemistry and Biophysics, Centre for Molecular Biomedicine (CMB), Friedrich Schiller University, Hans-Knoell-Strasse 2, 07745 Jena, Germany
| | - Sina Marielle Peter
- Institute of Biochemistry and Biophysics, Centre for Molecular Biomedicine (CMB), Friedrich Schiller University, Hans-Knoell-Strasse 2, 07745 Jena, Germany
| | - Dima Ward
- Institute of Biochemistry and Biophysics, Centre for Molecular Biomedicine (CMB), Friedrich Schiller University, Hans-Knoell-Strasse 2, 07745 Jena, Germany
| | - Martin Bens
- Core Facility Next Generation Sequencing, Leibniz Institute on Aging – Fritz Lipmann Institute (FLI), Beutenbergstrasse 11, 07745 Jena, Germany
| | - Sabine Vettorazzi
- Institute of Comparative Molecular Endocrinology (CME), Ulm University, Helmholtzstrasse 8/1, 89081 Ulm, Germany
| | - Karl-Heinz Guehrs
- Core Facility Proteomics, Leibniz Institute on Aging – Fritz Lipmann Institute (FLI), Beutenbergstrasse 11, 07745 Jena, Germany
| | - Jan P. Tuckermann
- Institute of Comparative Molecular Endocrinology (CME), Ulm University, Helmholtzstrasse 8/1, 89081 Ulm, Germany
| | - Thorsten Heinzel
- Institute of Biochemistry and Biophysics, Centre for Molecular Biomedicine (CMB), Friedrich Schiller University, Hans-Knoell-Strasse 2, 07745 Jena, Germany
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Chen Y, Lv J, Zu G, Yang F, Geng J, You Z, Jiang C, Sheng Q, Nie Z. BmCBP Catalyzes the Acetylation of BmApoLp-II Protein and Regulates Its Stability in Silkworm, Bombyx mori. INSECTS 2023; 14:309. [PMID: 37103124 PMCID: PMC10146067 DOI: 10.3390/insects14040309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 03/17/2023] [Accepted: 03/21/2023] [Indexed: 06/19/2023]
Abstract
Acetylation is an important and reversible post-translational modification (PTM) of protein, which is involved in many cellular physiological processes. In previous studies, lots of nutrient storage proteins were found to be highly acetylated in silkworms, and acetylation can improve the stability of these proteins. However, the related acetyltransferase was not involved. In the present work, a Bombyx mori nutrient storage protein, apolipophorin II (BmApoLp-II), was further confirmed to be acetylated, and the acetylation could improve its protein expression. Furthermore, RNAi and Co-IP showed that the acetyltransferase BmCBP was found to catalyze the acetylation modification of BmApoLp-II, and thus affect its protein expression. Meanwhile, it was proved that acetylation could improve the stability of the BmApoLp-II protein by completing its ubiquitination. These results lay a foundation for further study on the mechanism of regulating nutrition storage and hydrolysis utilization of storage proteins by BmCBP and the acetylation in the silkworm Bombyx mori.
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Ma Y, Wu C, Liu J, Liu Y, Lv J, Sun Z, Wang D, Jiang C, Sheng Q, You Z, Nie Z. The stability and antiapoptotic activity of Bm30K-3 can be improved by lysine acetylation in the silkworm, Bombyx mori. ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY 2020; 103:e21649. [PMID: 31777104 DOI: 10.1002/arch.21649] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 11/05/2019] [Accepted: 11/14/2019] [Indexed: 06/10/2023]
Abstract
Acetylation is an important, highly conserved, and reversible post-translational modification of proteins. Previously, we showed by nano-HPLC/MS/MS that many nutrient storage proteins in the silkworm are acetylated. Among these proteins, most of the known 30K proteins were shown to be acetylated, including 23 acetylated 30K proteins containing 49 acetylated sites (Kac), indicating the importance of the acetylation of 30K proteins in silkworm. In this study, Bm30K-3, a 30K protein containing three Kac sites, was further assessed in functional studies of its acetylation. Increasing the level of Bm30K-3 acetylation by adding the deacetylase inhibitor trichostatin A (TSA) increased the levels of this protein and further inhibited cellular apoptosis induced by H2 O2 . In contrast, decreasing the level of acetylation by adding the acetylase inhibitor C646 could reduce the level of Bm30K-3 and increase H2 O2 -induced apoptosis. Subsequently, BmN cells were treated with CHX and MG132, and increasing the acetylation level using TSA was shown to inhibit protein degradation and improve the stability of Bm30K-3. Furthermore, the acetylation of Bm30K-3 could compete with its ability to be ubiquitinated, suggesting that acetylation could inhibit the ubiquitin-mediated proteasome degradation pathway, improving the stability and accumulation of proteins in cells. These results further indicate that acetylation might regulate nutrition storage and utilization in Bombyx mori, which requires further study.
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Affiliation(s)
- Yafei Ma
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China
| | - Chengcheng Wu
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China
| | - Jiahan Liu
- School of Forestry and Biotechnology, Zhejiang A & F University, Linan, China
| | - Yue Liu
- Zhejiang Economic & Trade Polytechnic, Hangzhou, China
| | - Jiao Lv
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China
| | - Zihan Sun
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China
| | - Dan Wang
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China
| | - Caiying Jiang
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China
| | - Qing Sheng
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China
| | - Zhengying You
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China
| | - Zuoming Nie
- College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, China
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