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Shi Y, Fang N, Wu Y, Xu H, Ning A, Zhang W, Liu Y, Tao X, Chen Q, Tian T, Zhang L, Chu M, Cui J. NEDD4L mediates ITGB4 ubiquitination and degradation to suppress esophageal carcinoma progression. Cell Commun Signal 2024; 22:302. [PMID: 38831335 PMCID: PMC11145805 DOI: 10.1186/s12964-024-01685-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Accepted: 05/27/2024] [Indexed: 06/05/2024] Open
Abstract
The ubiquitination-mediated protein degradation exerts a vital role in the progression of multiple tumors. NEDD4L, which belongs to the E3 ubiquitin ligase NEDD4 family, is related to tumor genesis, metastasis and drug resistance. However, the anti-tumor role of NEDD4L in esophageal carcinoma, and the potential specific recognition substrate remain unclear. Based on public esophageal carcinoma database and clinical sample data, it was discovered in this study that the expression of NEDD4L in esophageal carcinoma was apparently lower than that in atypical hyperplastic esophageal tissue and esophageal squamous epithelium. Besides, patients with high expression of NEDD4L in esophageal carcinoma tissue had longer progression-free survival than those with low expression. Experiments in vivo and in vitro also verified that NEDD4L suppressed the growth and metastasis of esophageal carcinoma. Based on co-immunoprecipitation and proteome analysis, the NEDD4L ubiquitination-degraded protein ITGB4 was obtained. In terms of the mechanism, the HECT domain of NEDD4L specifically bound to the Galx-β domain of ITGB4, which modified the K915 site of ITGB4 in an ubiquitination manner, and promoted the ubiquitination degradation of ITGB4, thus suppressing the malignant phenotype of esophageal carcinoma.
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Affiliation(s)
- Yijun Shi
- Department of Thoracic and Cardiovascular Surgery, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, 212002, China
| | - Na Fang
- Department of Oncology, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, 212002, China
| | - Yutong Wu
- Department of Epidemiology, School of Public Health, Nantong University, 9 Seyuan Road, Nantong, 226019, China
| | - Huiwen Xu
- Department of Epidemiology, School of Public Health, Nantong University, 9 Seyuan Road, Nantong, 226019, China
| | - Anhui Ning
- Department of Epidemiology, School of Public Health, Nantong University, 9 Seyuan Road, Nantong, 226019, China
| | - Wendi Zhang
- Department of Epidemiology, School of Public Health, Nantong University, 9 Seyuan Road, Nantong, 226019, China
| | - Yiran Liu
- Department of Epidemiology, School of Public Health, Nantong University, 9 Seyuan Road, Nantong, 226019, China
| | - Xiaobo Tao
- Department of Epidemiology, School of Public Health, Nantong University, 9 Seyuan Road, Nantong, 226019, China
| | - Qiong Chen
- Department of Epidemiology, School of Public Health, Nantong University, 9 Seyuan Road, Nantong, 226019, China
| | - Tian Tian
- Department of Epidemiology, School of Public Health, Nantong University, 9 Seyuan Road, Nantong, 226019, China
| | - Lei Zhang
- Department of Epidemiology, School of Public Health, Nantong University, 9 Seyuan Road, Nantong, 226019, China
| | - Minjie Chu
- Department of Epidemiology, School of Public Health, Nantong University, 9 Seyuan Road, Nantong, 226019, China.
| | - Jiahua Cui
- Department of Epidemiology, School of Public Health, Nantong University, 9 Seyuan Road, Nantong, 226019, China.
- Department of Oncology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China.
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Morgenstern TJ, Darko-Boateng A, Afriyie E, Shanmugam SK, Zhou X, Choudhury P, Desai M, Kass RS, Clarke OB, Colecraft HM. Ion channel inhibition by targeted recruitment of NEDD4-2 with divalent nanobodies. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.05.28.596281. [PMID: 38854018 PMCID: PMC11160594 DOI: 10.1101/2024.05.28.596281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2024]
Abstract
Targeted recruitment of E3 ubiquitin ligases to degrade traditionally undruggable proteins is a disruptive paradigm for developing new therapeutics. Two salient limitations are that <2% of the ~600 E3 ligases in the human genome have been exploited to produce proteolysis targeting chimeras (PROTACs), and the efficacy of the approach has not been demonstrated for a vital class of complex multi-subunit membrane proteins- ion channels. NEDD4-1 and NEDD4-2 are physiological regulators of myriad ion channels, and belong to the 28-member HECT (homologous to E6AP C-terminus) family of E3 ligases with widespread roles in cell/developmental biology and diverse diseases including various cancers, immunological and neurological disorders, and chronic pain. The potential efficacy of HECT E3 ligases for targeted protein degradation is unexplored, constrained by a lack of appropriate binders, and uncertain due to their complex regulation by layered intra-molecular and posttranslational mechanisms. Here, we identified a nanobody that binds with high affinity and specificity to a unique site on the N-lobe of the NEDD4-2 HECT domain at a location physically separate from sites critical for catalysis- the E2 binding site, the catalytic cysteine, and the ubiquitin exosite- as revealed by a 3.1 Å cryo-electron microscopy reconstruction. Recruiting endogenous NEDD4-2 to diverse ion channel proteins (KCNQ1, ENaC, and CaV2.2) using a divalent (DiVa) nanobody format strongly reduced their functional expression with minimal off-target effects as assessed by global proteomics, compared to simple NEDD4-2 overexpression. The results establish utility of a HECT E3 ligase for targeted protein downregulation, validate a class of complex multi-subunit membrane proteins as susceptible to this modality, and introduce endogenous E3 ligase recruitment with DiVa nanobodies as a general method to generate novel genetically-encoded ion channel inhibitors.
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Affiliation(s)
- Travis J. Morgenstern
- Department of Molecular Pharmacology and Therapeutics, Columbia University Irving Medical Center, New York, NY
| | - Arden Darko-Boateng
- Department of Physiology and Cellular Biophysics, Columbia University Irving Medical Center, New York, NY
| | - Emmanuel Afriyie
- Department of Physiology and Cellular Biophysics, Columbia University Irving Medical Center, New York, NY
| | - Sri Karthika Shanmugam
- Department of Physiology and Cellular Biophysics, Columbia University Irving Medical Center, New York, NY
| | - Xinle Zhou
- Department of Molecular Pharmacology and Therapeutics, Columbia University Irving Medical Center, New York, NY
| | - Papiya Choudhury
- Department of Physiology and Cellular Biophysics, Columbia University Irving Medical Center, New York, NY
| | | | - Robert S. Kass
- Department of Molecular Pharmacology and Therapeutics, Columbia University Irving Medical Center, New York, NY
| | - Oliver B. Clarke
- Department of Physiology and Cellular Biophysics, Columbia University Irving Medical Center, New York, NY
- Department of Anesthesiology, Columbia University Irving Medical Center, New York, NY
| | - Henry M. Colecraft
- Department of Molecular Pharmacology and Therapeutics, Columbia University Irving Medical Center, New York, NY
- Department of Physiology and Cellular Biophysics, Columbia University Irving Medical Center, New York, NY
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3
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Somsen BA, Cossar PJ, Arkin MR, Brunsveld L, Ottmann C. 14-3-3 Protein-Protein Interactions: From Mechanistic Understanding to Their Small-Molecule Stabilization. Chembiochem 2024:e202400214. [PMID: 38738787 DOI: 10.1002/cbic.202400214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 05/11/2024] [Accepted: 05/13/2024] [Indexed: 05/14/2024]
Abstract
Protein-protein interactions (PPIs) are of utmost importance for maintenance of cellular homeostasis. Herein, a central role can be found for 14-3-3 proteins. These hub-proteins are known to bind hundreds of interaction partners, thereby regulating their activity, localization, and/or stabilization. Due to their ability to bind a large variety of client proteins, studies of 14-3-3 protein complexes flourished over the last decades, aiming to gain greater molecular understanding of these complexes and their role in health and disease. Because of their crucial role within the cell, 14-3-3 protein complexes are recognized as highly interesting therapeutic targets, encouraging the discovery of small molecule modulators of these PPIs. We discuss various examples of 14-3-3-mediated regulation of its binding partners on a mechanistic level, highlighting the versatile and multi-functional role of 14-3-3 within the cell. Furthermore, an overview is given on the development of stabilizers of 14-3-3 protein complexes, from initially used natural products to fragment-based approaches. These studies show the potential of 14-3-3 PPI stabilizers as novel agents in drug discovery and as tool compounds to gain greater molecular understanding of the role of 14-3-3-based protein regulation.
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Affiliation(s)
- Bente A Somsen
- Department of Biomedical Engineering and Institute for Complex Molecular Systems, Laboratory of Chemical Biology, Eindhoven University of Technology, P.O. Box 513, MB Eindhoven, 5600, Eindhoven, The Netherlands
| | - Peter J Cossar
- Department of Biomedical Engineering and Institute for Complex Molecular Systems, Laboratory of Chemical Biology, Eindhoven University of Technology, P.O. Box 513, MB Eindhoven, 5600, Eindhoven, The Netherlands
| | - Michelle R Arkin
- Department of Pharmaceutical Chemistry and Small Molecule Discovery Center (SMDC), University of California, San Francisco, California, 94143, United States
| | - Luc Brunsveld
- Department of Biomedical Engineering and Institute for Complex Molecular Systems, Laboratory of Chemical Biology, Eindhoven University of Technology, P.O. Box 513, MB Eindhoven, 5600, Eindhoven, The Netherlands
| | - Christian Ottmann
- Department of Biomedical Engineering and Institute for Complex Molecular Systems, Laboratory of Chemical Biology, Eindhoven University of Technology, P.O. Box 513, MB Eindhoven, 5600, Eindhoven, The Netherlands
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Xu J, Jiang W, Hu T, Long Y, Shen Y. NEDD4 and NEDD4L: Ubiquitin Ligases Closely Related to Digestive Diseases. Biomolecules 2024; 14:577. [PMID: 38785984 PMCID: PMC11117611 DOI: 10.3390/biom14050577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2024] [Revised: 05/09/2024] [Accepted: 05/11/2024] [Indexed: 05/25/2024] Open
Abstract
Protein ubiquitination is an enzymatic cascade reaction and serves as an important protein post-translational modification (PTM) that is involved in the vast majority of cellular life activities. The key enzyme in the ubiquitination process is E3 ubiquitin ligase (E3), which catalyzes the binding of ubiquitin (Ub) to the protein substrate and influences substrate specificity. In recent years, the relationship between the subfamily of neuron-expressed developmental downregulation 4 (NEDD4), which belongs to the E3 ligase system, and digestive diseases has drawn widespread attention. Numerous studies have shown that NEDD4 and NEDD4L of the NEDD4 family can regulate the digestive function, as well as a series of related physiological and pathological processes, by controlling the subsequent degradation of proteins such as PTEN, c-Myc, and P21, along with substrate ubiquitination. In this article, we reviewed the appropriate functions of NEDD4 and NEDD4L in digestive diseases including cell proliferation, invasion, metastasis, chemotherapeutic drug resistance, and multiple signaling pathways, based on the currently available research evidence for the purpose of providing new ideas for the prevention and treatment of digestive diseases.
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Affiliation(s)
| | | | | | | | - Yueming Shen
- Department of Digestive Diseases, The Affiliated Changsha Central Hospital, Hengyang Medical School, University of South China, 161 Shaoshan Road, Changsha 410000, China; (J.X.); (W.J.); (T.H.); (Y.L.)
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5
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Iamshanova O, Hämmerli AF, Ramaye E, Seljmani A, Ross-Kaschitza D, Schärz N, Essers M, Guichard S, Rougier JS, Abriel H. The dispensability of 14-3-3 proteins for the regulation of human cardiac sodium channel Nav1.5. PLoS One 2024; 19:e0298820. [PMID: 38452156 PMCID: PMC10919853 DOI: 10.1371/journal.pone.0298820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 01/30/2024] [Indexed: 03/09/2024] Open
Abstract
BACKGROUND 14-3-3 proteins are ubiquitous proteins that play a role in cardiac physiology (e.g., metabolism, development, and cell cycle). Furthermore, 14-3-3 proteins were proposed to regulate the electrical function of the heart by interacting with several cardiac ion channels, including the voltage-gated sodium channel Nav1.5. Given the many cardiac arrhythmias associated with Nav1.5 dysfunction, understanding its regulation by the protein partners is crucial. AIMS In this study, we aimed to investigate the role of 14-3-3 proteins in the regulation of the human cardiac sodium channel Nav1.5. METHODS AND RESULTS Amongst the seven 14-3-3 isoforms, only 14-3-3η (encoded by YWHAH gene) weakly co-immunoprecipitated with Nav1.5 when heterologously co-expressed in tsA201 cells. Total and cell surface expression of Nav1.5 was however not modified by 14-3-3η overexpression or inhibition with difopein, and 14-3-3η did not affect physical interaction between Nav1.5 α-α subunits. The current-voltage relationship and the amplitude of Nav1.5-mediated sodium peak current density were also not changed. CONCLUSIONS Our findings illustrate that the direct implication of 14-3-3 proteins in regulating Nav1.5 is not evident in a transformed human kidney cell line tsA201.
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Affiliation(s)
- Oksana Iamshanova
- Faculty of Medicine, Institute of Biochemistry and Molecular Medicine, University of Bern, Bern, Switzerland
| | - Anne-Flore Hämmerli
- Faculty of Medicine, Institute of Biochemistry and Molecular Medicine, University of Bern, Bern, Switzerland
| | - Elise Ramaye
- Faculty of Medicine, Institute of Biochemistry and Molecular Medicine, University of Bern, Bern, Switzerland
| | - Arbresh Seljmani
- Faculty of Medicine, Institute of Biochemistry and Molecular Medicine, University of Bern, Bern, Switzerland
- medi—Center for Medical Education, Bern, Switzerland
| | - Daniela Ross-Kaschitza
- Faculty of Medicine, Institute of Biochemistry and Molecular Medicine, University of Bern, Bern, Switzerland
| | - Noëlia Schärz
- Faculty of Medicine, Institute of Biochemistry and Molecular Medicine, University of Bern, Bern, Switzerland
- medi—Center for Medical Education, Bern, Switzerland
| | - Maria Essers
- Faculty of Medicine, Institute of Biochemistry and Molecular Medicine, University of Bern, Bern, Switzerland
| | - Sabrina Guichard
- Faculty of Medicine, Institute of Biochemistry and Molecular Medicine, University of Bern, Bern, Switzerland
| | - Jean-Sébastien Rougier
- Faculty of Medicine, Institute of Biochemistry and Molecular Medicine, University of Bern, Bern, Switzerland
| | - Hugues Abriel
- Faculty of Medicine, Institute of Biochemistry and Molecular Medicine, University of Bern, Bern, Switzerland
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Obsilova V, Obsil T. The yeast 14-3-3 proteins Bmh1 and Bmh2 regulate key signaling pathways. Front Mol Biosci 2024; 11:1327014. [PMID: 38328397 PMCID: PMC10847541 DOI: 10.3389/fmolb.2024.1327014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 01/15/2024] [Indexed: 02/09/2024] Open
Abstract
Cell signaling regulates several physiological processes by receiving, processing, and transmitting signals between the extracellular and intracellular environments. In signal transduction, phosphorylation is a crucial effector as the most common posttranslational modification. Selectively recognizing specific phosphorylated motifs of target proteins and modulating their functions through binding interactions, the yeast 14-3-3 proteins Bmh1 and Bmh2 are involved in catabolite repression, carbon metabolism, endocytosis, and mitochondrial retrograde signaling, among other key cellular processes. These conserved scaffolding molecules also mediate crosstalk between ubiquitination and phosphorylation, the spatiotemporal control of meiosis, and the activity of ion transporters Trk1 and Nha1. In humans, deregulation of analogous processes triggers the development of serious diseases, such as diabetes, cancer, viral infections, microbial conditions and neuronal and age-related diseases. Accordingly, the aim of this review article is to provide a brief overview of the latest findings on the functions of yeast 14-3-3 proteins, focusing on their role in modulating the aforementioned processes.
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Affiliation(s)
- Veronika Obsilova
- Institute of Physiology of the Czech Academy of Sciences, Laboratory of Structural Biology of Signaling Proteins, Division, BIOCEV, Vestec, Czechia
| | - Tomas Obsil
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Prague, Czechia
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7
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Yuan W, Qiu ZM, Li H, Huang M, Yuan JJ, Niu SL, Chen Q, Yang QW, Ouyang Q. Investigation of the Binding Interaction of Mfsd2a with NEDD4-2 via Molecular Dynamics Simulations. ACS Chem Neurosci 2024; 15:382-393. [PMID: 38155530 DOI: 10.1021/acschemneuro.3c00791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2023] Open
Abstract
Major facilitator superfamily domain-containing 2a (Mfsd2a) is a sodium-dependent lysophosphatidylcholine cotransporter that plays an important role in maintaining the integrity of the blood-brain barrier and neurological function. Abnormal degradation of Mfsd2a often leads to dysfunction of the blood-brain barrier, while upregulation of Mfsd2a can retrieve neurological damage. It has been reported that Mfsd2a can be specifically recognized and ubiquitinated by neural precursor cell-expressed developmentally downregulated gene 4 type 2 (NEDD4-2) ubiquitin ligase and finally degraded through the proteasome pathway. However, the structural basis for the specific binding of Mfsd2a to NEDD4-2 is unclear. In this work, we combined deep learning and molecular dynamics simulations to obtain a Mfsd2a structure with high quality and a stable Mfsd2a/NEDD4-2-WW3 interaction model. Moreover, molecular mechanics generalized Born surface area (MM-GBSA) methods coupled with per-residue energy decomposition studies were carried out to analyze the key residues that dominate the binding interaction. Based on these results, we designed three peptides containing the key residues by truncating the Mfsd2a sequences. One of them was found to significantly inhibit Mfsd2a ubiquitination, which was further validated in an oxygen-glucose deprivation (OGD) model in a human microvascular endothelial cell line. This work provides some new insights into the understanding of Mfsd2a and NEDD4-2 interaction and might promote further development of drugs targeting Mfsd2a ubiquitination.
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Affiliation(s)
- Wen Yuan
- Department of Medicinal Chemistry, Third Military Medical University, Chongqing 400038, China
| | - Zhong-Ming Qiu
- Department of Neurology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, China
| | - Hongwei Li
- Department of Medicinal Chemistry, Third Military Medical University, Chongqing 400038, China
| | - Mouxin Huang
- Department of Medicinal Chemistry, Third Military Medical University, Chongqing 400038, China
| | - Jun-Jie Yuan
- Department of Neurology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, China
| | - Sheng-Li Niu
- Department of Medicinal Chemistry, Third Military Medical University, Chongqing 400038, China
| | - Qiong Chen
- Department of Neurology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, China
| | - Qing-Wu Yang
- Department of Neurology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, China
| | - Qin Ouyang
- Department of Medicinal Chemistry, Third Military Medical University, Chongqing 400038, China
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8
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Han Y, Bagchi P, Yun CC. Regulation of the intestinal Na +/H + exchanger NHE3 by AMP-activated kinase is dependent on phosphorylation of NHE3 at S555 and S563. Am J Physiol Cell Physiol 2024; 326:C50-C59. [PMID: 38047302 PMCID: PMC11192475 DOI: 10.1152/ajpcell.00540.2023] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 11/14/2023] [Accepted: 11/15/2023] [Indexed: 12/05/2023]
Abstract
Electroneutral NaCl transport by Na+/H+ exchanger 3 (NHE3, SLC9A3) is the major Na+ absorptive mechanism in the intestine and decreased NHE3 activity contributes to diarrhea. Patients with diabetes often experience gastrointestinal adverse effects and medications are often a culprit for chronic diarrhea in type 2 diabetes (T2D). We have shown previously that metformin, the most widely prescribed drug for the treatment of T2D, induces diarrhea by inhibition of Na+/H+ exchanger 3 (NHE3) in rodent models of T2D. Metformin was shown to activate AMP-activated protein kinase (AMPK), but AMPK-independent glycemic effects of metformin are also known. The current study is undertaken to determine whether metformin inhibits NHE3 by activation of AMPK and the mechanism by which NHE3 is inhibited by AMPK. Inhibition of NHE3 by metformin was abolished by knockdown of AMPK-α1 or AMPK-α2. AMPK activation by 5-aminoimidazole-4-carboxamide ribonucleoside (AICAR) phosphorylated NHE3 at S555. S555 is the primary site of phosphorylation by protein kinase A (PKA), but AMPK phosphorylated S555 independently of PKA. Using Mass spectrometry, we found S563 as a newly recognized phosphorylation site in NHE3. Altering either S555 or S563 to Ala was sufficient to block the inhibition of NHE3 activity by AMPK. NHE3 inhibition is dependent on ubiquitination by the E3 ubiquitin ligase Nedd4-2 and metformin was shown to induce NHE3 internalization via Nedd4-2-mediated ubiquitination. AICAR did not increase NHE3 ubiquitination when S555 or S563 was mutated. We conclude that AMPK activation inhibits NHE3 activity and NHE3 inhibition is associated with phosphorylation of NHE3 at S555 and S563.NEW & NOTEWORTHY We show that AMP-activated protein kinase (AMPK) phosphorylates NHE3 at S555 and S563 to inhibit NHE3 activity in intestinal epithelial cells. Phosphorylation of NHE3 by AMPK is necessary for ubiquitination of NHE3.
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Affiliation(s)
- Yiran Han
- Gastroenterology Research, Atlanta Veterans Administration Medical Center, Decatur, Georgia, United States
- Division of Digestive Diseases, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia, United States
| | - Pritha Bagchi
- Emory Integrated Proteomics Core, Emory University, Atlanta, Georgia, United States
| | - C Chris Yun
- Gastroenterology Research, Atlanta Veterans Administration Medical Center, Decatur, Georgia, United States
- Division of Digestive Diseases, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia, United States
- Winship Cancer Institute, Emory University School of Medicine, Atlanta, Georgia, United States
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9
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Kefalas G, Rotin D. Primate-specific isoform of Nedd4-1 regulates substrate binding via Ser/Thr phosphorylation and 14-3-3 binding. Sci Rep 2023; 13:17903. [PMID: 37863970 PMCID: PMC10589272 DOI: 10.1038/s41598-023-44761-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Accepted: 10/12/2023] [Indexed: 10/22/2023] Open
Abstract
Nedd4 (Nedd4-1) is an E3 ubiquitin ligase involved in crucial biological processes such as growth factor receptor signaling. While canonical Nedd4-1 comprises a C2-WW(4)-HECT domain architecture, alternative splicing produces non-canonical isoforms that are poorly characterized. Here we characterized Nedd4-1(NE), a primate-specific isoform of Nedd4-1 that contains a large N-terminal Extension (NE) that replaces most of the C2 domain. We show that Nedd4-1(NE) mRNA is ubiquitously expressed in human tissues and cell lines. Moreover, we found that Nedd4-1(NE) is more active than the canonical Nedd4-1 isoform, likely due to the absence of a C2 domain-mediated autoinhibitory mechanism. Additionally, we identified two Thr/Ser phosphoresidues in the NE region that act as binding sites for 14-3-3 proteins, and show that phosphorylation on these sites reduces substrate binding. Finally, we show that the NE region can act as a binding site for the RPB2 subunit of RNA polymerase II, a unique substrate of Nedd4-1(NE) but not the canonical Nedd4-1. Taken together, our results demonstrate that alternative splicing of the ubiquitin ligase Nedd4-1 can produce isoforms that differ in their catalytic activity, binding partners and substrates, and mechanisms of regulation.
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Affiliation(s)
- George Kefalas
- Cell Biology Program, the Hospital for Sick Children, PGCRL 19-9715, 686 Bay Street, Toronto, ON, M5G 0A4, Canada
- Biochemistry Department, University of Toronto, Toronto, ON, M5G 0A4, Canada
| | - Daniela Rotin
- Cell Biology Program, the Hospital for Sick Children, PGCRL 19-9715, 686 Bay Street, Toronto, ON, M5G 0A4, Canada.
- Biochemistry Department, University of Toronto, Toronto, ON, M5G 0A4, Canada.
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10
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Liu S, Guo R, Xu H, Yang J, Luo H, Yeung SCJ, Li K, Lee MH, Yang R. 14-3-3σ-NEDD4L axis promotes ubiquitination and degradation of HIF-1α in colorectal cancer. Cell Rep 2023; 42:112870. [PMID: 37494179 DOI: 10.1016/j.celrep.2023.112870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 06/12/2023] [Accepted: 07/11/2023] [Indexed: 07/28/2023] Open
Abstract
A hypoxic microenvironment contributes to tumor progression, with hypoxia-inducible factor-1α (HIF-1α) being a critical regulator. We have reported that 14-3-3σ is negatively associated with HIF-1α expression; however, its role in hypoxia-induced tumor progression remains poorly characterized. Here we show that 14-3-3σ suppresses cancer hypoxia-induced metastasis and angiogenesis in colorectal cancer (CRC). 14-3-3σ opposes HIF-1α expression by regulating the protein stability of HIF-1α, thereby decreasing HIF-1α transcriptional activity and suppressing tumor progression. Mechanistic studies show that the 14-3-3σ-interacting protein neural precursor cell-expressed developmentally down-regulated 4-like (NEDD4L) is an E3 ligase that targets HIF-1α. 14-3-3σ promotes the binding of S448-phosphorylated NEDD4L to HIF-1α, thereby enhancing HIF-1α poly-ubiquitination and subsequent proteasome-mediated degradation. Consistent with this anti-tumorigenic function for 14-3-3σ, low 14-3-3σ expression levels correlate with poor CRC patient survival, and 14-3-3σ enhances the response of CRC to bevacizumab. These results reveal an important mechanism for 14-3-3σ in tumor suppression through HIF-1α regulation.
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Affiliation(s)
- Sicheng Liu
- Department of the Second Medical Oncology, The Third Affiliated Hospital of Kunming Medical University, Kunming 650100, China; Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Disease, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou 510655, China; Guangdong Research Institute of Gastroenterology, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou 510655, China
| | - Rui Guo
- Department of the Second Medical Oncology, The Third Affiliated Hospital of Kunming Medical University, Kunming 650100, China
| | - Hui Xu
- Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Disease, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou 510655, China; Guangdong Research Institute of Gastroenterology, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou 510655, China
| | - Jinneng Yang
- Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Disease, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou 510655, China; Guangdong Research Institute of Gastroenterology, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou 510655, China
| | - Haidan Luo
- Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Disease, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou 510655, China; Guangdong Research Institute of Gastroenterology, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou 510655, China
| | - Sai-Ching Jim Yeung
- Department of Emergency Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Kai Li
- Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Disease, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou 510655, China; Guangdong Research Institute of Gastroenterology, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou 510655, China.
| | - Mong-Hong Lee
- Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Disease, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou 510655, China; Guangdong Research Institute of Gastroenterology, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou 510655, China.
| | - Runxiang Yang
- Department of the Second Medical Oncology, The Third Affiliated Hospital of Kunming Medical University, Kunming 650100, China.
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11
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Somsen BA, Sijbesma E, Leysen S, Honzejkova K, Visser EJ, Cossar PJ, Obšil T, Brunsveld L, Ottmann C. Molecular basis and dual ligand regulation of tetrameric Estrogen Receptor α/14-3-3ζ protein complex. J Biol Chem 2023:104855. [PMID: 37224961 PMCID: PMC10302166 DOI: 10.1016/j.jbc.2023.104855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 05/15/2023] [Accepted: 05/16/2023] [Indexed: 05/26/2023] Open
Abstract
Therapeutic strategies targeting Nuclear Receptors (NRs) beyond their endogenous ligand binding pocket have gained significant scientific interest, driven by a need to circumvent problems associated with drug resistance and pharmacological profile. The hub protein 14-3-3 is an endogenous regulator of various NRs, providing a novel entry point for small molecule modulation of NR activity. Exemplified, 14-3-3 binding to the C-terminal F-domain of the Estrogen Receptor alpha (ERα), and small molecule stabilization of the ERα/14-3-3ζ protein complex by the natural product Fusicoccin A (FC-A), was demonstrated to downregulate ERα-mediated breast cancer proliferation. This presents a novel drug discovery approach to target ERα, however, structural and mechanistic insights into ERα/14-3-3 complex formation are lacking. Here, we provide an in-depth molecular understanding of the ERα/14-3-3ζ complex by isolating 14-3-3ζ in complex with an ERα protein construct comprising its Ligand Binding Domain (LBD) and phosphorylated F-domain. Bacterial co-expression and co-purification of the ERα/14-3-3ζ complex, followed by extensive biophysical and structural characterization, revealed a tetrameric complex between the ERα homodimer and the 14-3-3ζ homodimer. 14-3-3ζ binding to ERα, and ERα/14-3-3ζ complex stabilization by FC-A, appeared to be orthogonal to ERα endogenous agonist (E2) binding, E2-induced conformational changes, and cofactor recruitment. Similarly, the ERα antagonist 4-hydroxytamoxifen inhibited cofactor recruitment to the ERα LBD while ERα was bound to 14-3-3ζ. Furthermore, stabilization of the ERα/14-3-3ζ protein complex by FC-A was not influenced by the disease-associated and 4-hydroxytamoxifen resistant ERα-Y537S mutant. Together, these molecular and mechanistic insights provide direction for targeting ERα via the ERα/14-3-3 complex as an alternative drug discovery approach.
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Affiliation(s)
- Bente A Somsen
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands
| | - Eline Sijbesma
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands
| | - Seppe Leysen
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands
| | - Karolina Honzejkova
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Prague, Czech Republic
| | - Emira J Visser
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands
| | - Peter J Cossar
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands
| | - Tomáš Obšil
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Prague, Czech Republic
| | - Luc Brunsveld
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands.
| | - Christian Ottmann
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands.
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12
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Zhou T, Liao W, Wang X, Wang Y, Yang P, Zuo L, Zhang X. Low temperature reduces occludin expression in bronchial epithelial cells: Implications in cold-induced asthma. Mol Immunol 2023; 157:176-185. [PMID: 37044043 DOI: 10.1016/j.molimm.2023.03.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 02/25/2023] [Accepted: 03/24/2023] [Indexed: 04/14/2023]
Abstract
BACKGROUND Cold exposure is a common factor to trigger asthma attacks. However, the underlying mechanism has not been thoroughly elucidated. We aimed to investigate the hypothesis that low temperature reduces occludin expression and compromises epithelial barrier function in airways, which in turn, results in asthma exacerbation. METHODS We examined occludin expression in human bronchial epithelial cell line (Beas-2B) cells exposed to either 29 °C or 37 °C. The following drugs were administered prior to cold treatment: MG132 (a proteasome inhibitor), cycloheximide (a protein synthesis inhibitor), HC-067047 plus GSK2193874 (transient receptor potential vanilloid 4 [TRPV4] antagonists), or C4-ceramide (a glucocorticoid-inducible kinase [SGK1] activator). siNedd4-2 was transfected into Beas-2B cells to investigate the role that Nedd4-2 plays in mediating occludin instability induced by cold. In animal experiments, we treated ovalbumin (OVA)-induced asthmatic mice with a thermoneutral temperature of 30 °C or cold exposure (10 °C, 6 h/day) for 2 weeks. GSK2193874 or C4-ceramide was administered during the cold treatment. Occludin expression of the lung, pulmonary permeability, serum IgE levels, and lung inflammation were assessed. RESULTS Low temperature treatment (29 °C) significantly reduced the expression of occludin in Beas-2B cells from 1 to 9 h, which was rescued upon treatment with MG132, HC-067047 plus GSK2193874, C4-ceramide, or Nedd4-2 knockdown. Low temperatures affected occludin stability through SGK1/Nedd4-2-dependent proteolysis. In vivo mice data revealed that cold exposure compromised the airway epithelial barrier function, decreased occludin expression, and exacerbated lung inflammation, which was attenuated by the GSK2193874 or C4-ceramide injection. CONCLUSION We identified a potential mechanism underlying cold-induced asthma exacerbation involving Nedd4-2-mediated occludin proteolysis and airway epithelial barrier disruption.
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Affiliation(s)
- Tingyang Zhou
- State Key Laboratory of Respiratory Disease, Department of Otolaryngology, Head & Neck Surgery, Laboratory of ENT-HNS Disease, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Wenjing Liao
- State Key Laboratory of Respiratory Disease, Department of Otolaryngology, Head & Neck Surgery, Laboratory of ENT-HNS Disease, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Xiaofen Wang
- State Key Laboratory of Respiratory Disease, Department of Otolaryngology, Head & Neck Surgery, Laboratory of ENT-HNS Disease, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Yiyan Wang
- State Key Laboratory of Respiratory Disease, Department of Otolaryngology, Head & Neck Surgery, Laboratory of ENT-HNS Disease, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Pingchang Yang
- State Key Laboratory of Respiratory Disease, Department of Otolaryngology, Head & Neck Surgery, Laboratory of ENT-HNS Disease, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China; Department of Allergy and Clinical Immunology, The First Affiliated Hospital, Guangzhou Medical University, Guangzhou, China; Research Center of Allergy & Immunology, Shenzhen University School of Medicine, Shenzhen, China
| | - Li Zuo
- School of Medicine, The University of Texas and UT Health Rio Grande Valley, TX 78539, USA
| | - Xiaowen Zhang
- State Key Laboratory of Respiratory Disease, Department of Otolaryngology, Head & Neck Surgery, Laboratory of ENT-HNS Disease, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China; Department of Cancer, The First Affiliated Hospital, Guangzhou Medical University, Guangzhou, China; Innovation and Transformation Platform of Upper Airway Disease in Guangdong Province, China; Department of Allergy and Clinical Immunology, The First Affiliated Hospital, Guangzhou Medical University, Guangzhou, China.
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13
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Fengmin L, Heng Z, Xiangjun Z, Xiaobo W, Huiyan L, Haitian F. Site-directed mutagenesis improves the practical application of L-glutamic acid decarboxylase in Escherichia coli. Eng Life Sci 2023; 23:e2200064. [PMID: 37025190 PMCID: PMC10071571 DOI: 10.1002/elsc.202200064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 01/11/2023] [Accepted: 02/26/2023] [Indexed: 04/08/2023] Open
Abstract
γ-Aminobutyric acid (GABA) is a kind of non-proteinogenic amino acid which is highly soluble in water and widely used in the food and pharmaceutical industries. Enzymatic conversion is an efficient method to produce GABA, whereby glutamic acid decarboxylase (GAD) is the key enzyme that catalyzes the process. The activity of wild-type GAD is usually limited by temperature, pH or biotin concentration, and hence directional modification is applied to improve its catalytic properties and practical application. GABA was produced using whole cell transformation of the recombinant strains Escherichia coli BL21(DE3)-Gad B, E. coli BL21(DE3)-Gad B-T62S and E. coli BL21(DE3)-Gad B-Q309A. The corresponding GABA concentrations in the fermentation broth were 219.09, 238.42, and 276.66 g/L, and the transformation rates were 78.02%, 85.04%, and 98.58%, respectively. The results showed that Gad B-T62S and Gad B-Q309A are two effective mutation sites. These findings may contribute to ideas for constructing potent recombinant strains for GABA production. Practical Application : Enzymatic properties of the GAD from Escherichia coli and GAD site-specific mutants were examined by analyzing their conserved sequences, substrate contacts, contact between GAD amino acid residues and mutation energy (ΔΔG) of the GAD mutants. The enzyme activity and stability of Gad B-T62S and Gad B-Q309A mutants were improved compared to Gad B. The kinetic parameters Km and Vmax of Gad B, Gad B-T62S, and Gad B-Q309A mutants were 11.3 ± 2.1 mM and 32.1 ± 2.4 U/mg, 7.3 ± 2.5 mM and 76.1 ± 3.1 U/mg, and 7.2 ± 3.8 mM and 87.3 ± 1.1 U/mg, respectively. GABA was produced using whole cell transformation of the recombinant strains E. coli BL21(DE3)-Gad B, E. coli BL21(DE3)-Gad B-T62S, and E. coli BL21(DE3)-Gad B-Q309A. The corresponding GABA concentrations in the fermentation broth were 219.09, 238.42, and 276.66 g/L, and the transformation rates were 78.02%, 85.04%, and 98.58%, respectively.
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Affiliation(s)
- Liu Fengmin
- School of Food and WineNingxia Key Laboratory for Food Microbial‐Applications Technology and Safety ControlNingxia UniversityYinchuanChina
| | - Zhang Heng
- School of Food and WineNingxia Key Laboratory for Food Microbial‐Applications Technology and Safety ControlNingxia UniversityYinchuanChina
| | - Zhang Xiangjun
- School of Food and WineNingxia Key Laboratory for Food Microbial‐Applications Technology and Safety ControlNingxia UniversityYinchuanChina
| | - Wei Xiaobo
- School of Food and WineNingxia Key Laboratory for Food Microbial‐Applications Technology and Safety ControlNingxia UniversityYinchuanChina
| | - Liu Huiyan
- School of Food and WineNingxia Key Laboratory for Food Microbial‐Applications Technology and Safety ControlNingxia UniversityYinchuanChina
| | - Fang Haitian
- School of Food and WineNingxia Key Laboratory for Food Microbial‐Applications Technology and Safety ControlNingxia UniversityYinchuanChina
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Zhu J, Peng Z, Tian X, Wu T, Sun A, Yang W, Lin Q. Activation of E3 ubiquitin ligase WWP2 by non-receptor tyrosine kinase ACK1. IUBMB Life 2023. [PMID: 36773333 DOI: 10.1002/iub.2705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Accepted: 01/19/2023] [Indexed: 02/13/2023]
Abstract
WW domain containing E3 ubiquitin protein ligase 2 (WWP2) is a member of the NEDD4 E3 ubiquitin ligase family. WWP2 ligase activity is regulated by the 2, 3-linker auto-inhibition. Tyrosine phosphorylation of the 2, 3-linker was identified as an activating means for releasing the auto-inhibition of WWP2. However, the tyrosine kinase (TK) for the phosphorylation and activation remains unknown. In this report, we have found that non-receptor TK ACK1 binds to the WW3 domain of WWP2 and phosphorylates WWP2. ACK1 phosphorylates WWP2 at the 2, 3-linker and partially activates the ubiquitination ligase activity. Unexpectedly, tyrosine phosphorylation of the 2, 3-linker seems not a major mode for activation of WWP2, as ACK1 causes much higher activation of the 2, 3-linker tyrosine phosphorylation defective mutants of WWP2 than that of wild-type WWP2. Furthermore, epidermal growth factor (EGF) stimulates tyrosine phosphorylation of WWP2 and this EGF-stimulated phosphorylation of WWP2 is mediated by ACK1. Finally, knockdown of WWP2 by shWWP2 inhibits the EGF-dependent cell proliferation of lung cancer A549 cells, suggesting that WWP2 may function in the EGFR signaling in lung cancer progression. Taken together, our findings have revealed a novel mechanism underlying activation of WWP2.
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Affiliation(s)
- Jun Zhu
- School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China
| | - Ziluo Peng
- School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China
| | - Xianyan Tian
- School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China
| | - Tiantian Wu
- School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China
| | - Aiqin Sun
- School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China
| | - Wannian Yang
- School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China
| | - Qiong Lin
- School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China
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15
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Masaryk J, Kale D, Pohl P, Ruiz-Castilla FJ, Zimmermannová O, Obšilová V, Ramos J, Sychrová H. The second intracellular loop of the yeast Trk1 potassium transporter is involved in regulation of activity, and interaction with 14-3-3 proteins. Comput Struct Biotechnol J 2023; 21:2705-2716. [PMID: 37168872 PMCID: PMC10165143 DOI: 10.1016/j.csbj.2023.04.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 04/19/2023] [Accepted: 04/19/2023] [Indexed: 05/13/2023] Open
Abstract
Potassium is an essential intracellular ion, and a sufficient intracellular concentration of it is crucial for many processes; therefore it is fundamental for cells to precisely regulate K+ uptake and efflux through the plasma membrane. The uniporter Trk1 is a key player in K+ acquisition in yeasts. The TRK1 gene is expressed at a low and stable level; thus the activity of the transporter needs to be regulated at a posttranslational level. S. cerevisiae Trk1 changes its activity and affinity for potassium ion quickly and according to both internal and external concentrations of K+, as well as the membrane potential. The molecular basis of these changes has not been elucidated, though phosphorylation is thought to play an important role. In this study, we examined the role of the second, short, and highly conserved intracellular hydrophilic loop of Trk1 (IL2), and identified two phosphorylable residues (Ser882 and Thr900) as very important for 1) the structure of the loop and consequently for the targeting of Trk1 to the plasma membrane, and 2) the upregulation of the transporter's activity reaching maximal affinity under low external K+ conditions. Moreover, we identified three residues (Thr155, Ser414, and Thr900) within the Trk1 protein as strong candidates for interaction with 14-3-3 regulatory proteins, and showed, in an in vitro experiment, that phosphorylated Thr900 of the IL2 indeed binds to both isoforms of yeast 14-3-3 proteins, Bmh1 and Bmh2.
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Affiliation(s)
- Jakub Masaryk
- Institute of Physiology of the Czech Academy of Sciences, Laboratory of Membrane Transport, 14200 Prague 4, Czech Republic
| | - Deepika Kale
- Institute of Physiology of the Czech Academy of Sciences, Laboratory of Membrane Transport, 14200 Prague 4, Czech Republic
| | - Pavel Pohl
- Institute of Physiology of the Czech Academy of Sciences, Laboratory of Structural Biology of Signaling Proteins, Division BIOCEV, 25250 Vestec, Czech Republic
| | - Francisco J. Ruiz-Castilla
- Department of Agricultural Chemistry, Edaphology and Microbiology, University of Córdoba, 140 71 Córdoba, Spain
| | - Olga Zimmermannová
- Institute of Physiology of the Czech Academy of Sciences, Laboratory of Membrane Transport, 14200 Prague 4, Czech Republic
| | - Veronika Obšilová
- Institute of Physiology of the Czech Academy of Sciences, Laboratory of Structural Biology of Signaling Proteins, Division BIOCEV, 25250 Vestec, Czech Republic
| | - José Ramos
- Department of Agricultural Chemistry, Edaphology and Microbiology, University of Córdoba, 140 71 Córdoba, Spain
| | - Hana Sychrová
- Institute of Physiology of the Czech Academy of Sciences, Laboratory of Membrane Transport, 14200 Prague 4, Czech Republic
- Corresponding author.
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16
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Somsen BA, Craenmehr FWB, Liu WHW, Koops AA, Pennings MAM, Visser EJ, Ottmann C, Cossar PJ, Brunsveld L. Functional mapping of the 14-3-3 hub protein as a guide to design 14-3-3 molecular glues. Chem Sci 2022; 13:13122-13131. [PMID: 36425501 PMCID: PMC9667936 DOI: 10.1039/d2sc04662h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2022] [Accepted: 10/24/2022] [Indexed: 12/03/2022] Open
Abstract
Molecular glues represent an evolution in drug discovery, however, targeted stabilization of protein complexes remains challenging, owing to a paucity of drug design rules. The functional mapping of hotspots has been critical to protein-protein interaction (PPI) inhibitor research, however, the orthogonal approach to stabilize PPIs has not exploited this information. Utilizing the hub protein 14-3-3 as a case study we demonstrate that functional mapping of hotspots provides a triage map for 14-3-3 molecular glue development. Truncation and mutation studies allowed deconvoluting the energetic contributions of sidechain and backbone interactions of a 14-3-3-binding non-natural peptide. Three central 14-3-3 hotspots were identified and their thermodynamic characteristics profiled. In addition to the phospho-binding pocket; (i) Asn226, (ii) Lys122 and (iii) the hydrophobic patch formed by Leu218, Ile219 and Leu222 were critical for protein complex formation. Exploiting this hotspot information allowed a peptide-based molecular glue that elicits high cooperativity (α = 36) and selectively stabilizes the 14-3-3/ChREBP PPI to be uniquely developed.
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Affiliation(s)
- Bente A Somsen
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Eindhoven University of Technology P.O. Box 513 Eindhoven 5600 MB The Netherlands
| | - Fenna W B Craenmehr
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Eindhoven University of Technology P.O. Box 513 Eindhoven 5600 MB The Netherlands
| | - Wei-Hong W Liu
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Eindhoven University of Technology P.O. Box 513 Eindhoven 5600 MB The Netherlands
| | - Auke A Koops
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Eindhoven University of Technology P.O. Box 513 Eindhoven 5600 MB The Netherlands
| | - Marloes A M Pennings
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Eindhoven University of Technology P.O. Box 513 Eindhoven 5600 MB The Netherlands
| | - Emira J Visser
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Eindhoven University of Technology P.O. Box 513 Eindhoven 5600 MB The Netherlands
| | - Christian Ottmann
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Eindhoven University of Technology P.O. Box 513 Eindhoven 5600 MB The Netherlands
| | - Peter J Cossar
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Eindhoven University of Technology P.O. Box 513 Eindhoven 5600 MB The Netherlands
| | - Luc Brunsveld
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Eindhoven University of Technology P.O. Box 513 Eindhoven 5600 MB The Netherlands
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17
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Thurairajah B, Hudson AJ, Doveston RG. Contemporary biophysical approaches for studying 14-3-3 protein-protein interactions. Front Mol Biosci 2022; 9:1043673. [PMID: 36425654 PMCID: PMC9679655 DOI: 10.3389/fmolb.2022.1043673] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Accepted: 10/24/2022] [Indexed: 06/28/2024] Open
Abstract
14-3-3 proteins are a family of regulatory hubs that function through a vast network of protein-protein interactions. Their dysfunction or dysregulation is implicated in a wide range of diseases, and thus they are attractive drug targets, especially for molecular glues that promote protein-protein interactions for therapeutic intervention. However, an incomplete understanding of the molecular mechanisms that underpin 14-3-3 function hampers progress in drug design and development. Biophysical methodologies are an essential element of the 14-3-3 analytical toolbox, but in many cases have not been fully exploited. Here, we present a contemporary review of the predominant biophysical techniques used to study 14-3-3 protein-protein interactions, with a focus on examples that address key questions and challenges in the 14-3-3 field.
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Affiliation(s)
| | | | - Richard G. Doveston
- Leicester Institute for Structural and Chemical Biology and School of Chemistry, University of Leicester, Leicester, United Kingdom
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18
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Jayaprakash S, Hegde M, BharathwajChetty B, Girisa S, Alqahtani MS, Abbas M, Sethi G, Kunnumakkara AB. Unraveling the Potential Role of NEDD4-like E3 Ligases in Cancer. Int J Mol Sci 2022; 23:ijms232012380. [PMID: 36293239 PMCID: PMC9604169 DOI: 10.3390/ijms232012380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 09/28/2022] [Accepted: 10/04/2022] [Indexed: 11/06/2022] Open
Abstract
Cancer is a deadly disease worldwide, with an anticipated 19.3 million new cases and 10.0 million deaths occurring in 2020 according to GLOBOCAN 2020. It is well established that carcinogenesis and cancer development are strongly linked to genetic changes and post-translational modifications (PTMs). An important PTM process, ubiquitination, regulates every aspect of cellular activity, and the crucial enzymes in the ubiquitination process are E3 ubiquitin ligases (E3s) that affect substrate specificity and must therefore be carefully regulated. A surfeit of studies suggests that, among the E3 ubiquitin ligases, neuronal precursor cell-expressed developmentally downregulated 4 (NEDD4)/NEDD4-like E3 ligases show key functions in cellular processes by controlling subsequent protein degradation and substrate ubiquitination. In addition, it was demonstrated that NEDD4 mainly acts as an oncogene in various cancers, but also plays a tumor-suppressive role in some cancers. In this review, to comprehend the proper function of NEDD4 in cancer development, we summarize its function, both its tumor-suppressive and oncogenic role, in multiple types of malignancies. Moreover, we briefly explain the role of NEDD4 in carcinogenesis and progression, including cell survival, cell proliferation, autophagy, cell migration, invasion, metastasis, epithelial-mesenchymal transition (EMT), chemoresistance, and multiple signaling pathways. In addition, we briefly explain the significance of NEDD4 as a possible target for cancer treatment. Therefore, we conclude that targeting NEDD4 as a therapeutic method for treating human tumors could be a practical possibility.
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Affiliation(s)
- Sujitha Jayaprakash
- Cancer Biology Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology (IIT) Guwahati, Guwahati 781039, Assam, India
| | - Mangala Hegde
- Cancer Biology Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology (IIT) Guwahati, Guwahati 781039, Assam, India
| | - Bandari BharathwajChetty
- Cancer Biology Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology (IIT) Guwahati, Guwahati 781039, Assam, India
| | - Sosmitha Girisa
- Cancer Biology Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology (IIT) Guwahati, Guwahati 781039, Assam, India
| | - Mohammed S. Alqahtani
- Radiological Sciences Department, College of Applied Medical Sciences, King Khalid University, Abha 61421, Saudi Arabia
- BioImaging Unit, Space Research Centre, Michael Atiyah Building, University of Leicester, Leicester LE1 7RH, UK
| | - Mohamed Abbas
- Electrical Engineering Department, College of Engineering, King Khalid University, Abha 61421, Saudi Arabia
- Electronics and Communications Department, College of Engineering, Delta University for Science and Technology, Gamasa 35712, Egypt
| | - Gautam Sethi
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117600, Singapore
- Correspondence: (G.S.); (A.B.K.)
| | - Ajaikumar B. Kunnumakkara
- Cancer Biology Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology (IIT) Guwahati, Guwahati 781039, Assam, India
- Correspondence: (G.S.); (A.B.K.)
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Obsilova V, Obsil T. Structural insights into the functional roles of 14-3-3 proteins. Front Mol Biosci 2022; 9:1016071. [PMID: 36188227 PMCID: PMC9523730 DOI: 10.3389/fmolb.2022.1016071] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Accepted: 09/02/2022] [Indexed: 12/02/2022] Open
Abstract
Signal transduction cascades efficiently transmit chemical and/or physical signals from the extracellular environment to intracellular compartments, thereby eliciting an appropriate cellular response. Most often, these signaling processes are mediated by specific protein-protein interactions involving hundreds of different receptors, enzymes, transcription factors, and signaling, adaptor and scaffolding proteins. Among them, 14-3-3 proteins are a family of highly conserved scaffolding molecules expressed in all eukaryotes, where they modulate the function of other proteins, primarily in a phosphorylation-dependent manner. Through these binding interactions, 14-3-3 proteins participate in key cellular processes, such as cell-cycle control, apoptosis, signal transduction, energy metabolism, and protein trafficking. To date, several hundreds of 14-3-3 binding partners have been identified, including protein kinases, phosphatases, receptors and transcription factors, which have been implicated in the onset of various diseases. As such, 14-3-3 proteins are promising targets for pharmaceutical interventions. However, despite intensive research into their protein-protein interactions, our understanding of the molecular mechanisms whereby 14-3-3 proteins regulate the functions of their binding partners remains insufficient. This review article provides an overview of the current state of the art of the molecular mechanisms whereby 14-3-3 proteins regulate their binding partners, focusing on recent structural studies of 14-3-3 protein complexes.
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Affiliation(s)
- Veronika Obsilova
- Institute of Physiology of the Czech Academy of Sciences, Laboratory of Structural Biology of Signaling Proteins, Division BIOCEV, Vestec, Czechia
- *Correspondence: Veronika Obsilova, ; Tomas Obsil,
| | - Tomas Obsil
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Prague, Czechia
- *Correspondence: Veronika Obsilova, ; Tomas Obsil,
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20
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The Post-Translational Modification Networking in WNK-Centric Hypertension Regulation and Electrolyte Homeostasis. Biomedicines 2022; 10:biomedicines10092169. [PMID: 36140271 PMCID: PMC9496095 DOI: 10.3390/biomedicines10092169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 08/26/2022] [Accepted: 08/27/2022] [Indexed: 11/17/2022] Open
Abstract
The with-no-lysine (WNK) kinase family, comprising four serine-threonine protein kinases (WNK1-4), were first linked to hypertension due to their mutations in association with pseudohypoaldosteronism type II (PHAII). WNK kinases regulate crucial blood pressure regulators, SPAK/OSR1, to mediate the post-translational modifications (PTMs) of their downstream ion channel substrates, such as sodium chloride co-transporter (NCC), epithelial sodium chloride (ENaC), renal outer medullary potassium channel (ROMK), and Na/K/2Cl co-transporters (NKCCs). In this review, we summarize the molecular pathways dysregulating the WNKs and their downstream target renal ion transporters. We summarize each of the genetic variants of WNK kinases and the small molecule inhibitors that have been discovered to regulate blood pressure via WNK-triggered PTM cascades.
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21
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Brink H, Riemens R, Thee S, Bieshuizen B, Da Costa Pereira D, Wijtmans M, De Esch IJP, Smit MJ, De Boer AH. Fragment screening yields a small-molecule stabilizer of 14-3-3 dimers that modulates client protein interactions. Chembiochem 2022; 23:e202200178. [PMID: 35767695 PMCID: PMC9543038 DOI: 10.1002/cbic.202200178] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 06/28/2022] [Indexed: 11/30/2022]
Abstract
The development of protein‐protein interaction (PPI) inhibitors has been a successful strategy in drug development. However, the identification of PPI stabilizers has proven much more challenging. Here we report a fragment‐based drug screening approach using the regulatory hub‐protein 14‐3‐3 as a platform for identifying PPI stabilizers. A homogenous time‐resolved FRET assay was used to monitor stabilization of 14‐3‐3/peptide binding using the known interaction partner estrogen receptor alpha. Screening of an in‐house fragment library identified fragment 2 (VUF15640) as a putative PPI stabilizer capable of cooperatively stabilizing 14‐3‐3 PPIs in a cooperative fashion with Fusicoccin‐A. Mechanistically, fragment 2 appears to enhance 14‐3‐3 dimerization leading to increased client‐protein binding. Functionally, fragment 2 enhanced potency of 14‐3‐3 in a cell‐free system inhibiting the enzyme activity of the nitrate reductase. In conclusion, we identified a general PPI stabilizer targeting 14‐3‐3, which could be used as a tool compound for investigating 14‐3‐3 client protein interactions.
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Affiliation(s)
- Hendrik Brink
- Vrije Universiteit Amsterdam, Division of medicinal chemistry, faculty of life sciences, De Boelelaan 1108, 1081 HZ, Amsterdam, NETHERLANDS
| | - Rick Riemens
- Vrije Universiteit Amsterdam, Division of medicinal chemistry, faculty of life sciences, NETHERLANDS
| | - Stephanie Thee
- Vrije Universiteit Amsterdam, Division of Medicinal Chemistry, Faculty of Sciences, NETHERLANDS
| | - Berend Bieshuizen
- Vrije Universiteit Amsterdam, Division of medicinal chemistry, faculty of life sciences, NETHERLANDS
| | - Daniel Da Costa Pereira
- Vrije Universiteit Amsterdam, Division of Medicinal Chemistry, Faculty of Sciences, NETHERLANDS
| | - Maikel Wijtmans
- Vrije Universiteit Amsterdam, Division of medicinal chemistry, faculty of life sciences, NETHERLANDS
| | - Iwan J P De Esch
- Vrije Universiteit Amsterdam, Division of medicinal chemistry, faculty of life sciences, NETHERLANDS
| | - Martine J Smit
- Vrije Universiteit Amsterdam, Division of medicinal chemistry, faculty of life sciences, NETHERLANDS
| | - Albertus H De Boer
- Vrije Universiteit Amsterdam, Division of Medicinal Chemistry, De Boelelaan 1108, 1075GJ, Amsterdam, NETHERLANDS
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22
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Han X, Ren J, Lohner H, Yakoumatos L, Liang R, Wang H. SGK1 negatively regulates inflammatory immune responses and protects against alveolar bone loss through modulation of TRAF3 activity. J Biol Chem 2022; 298:102036. [PMID: 35588785 PMCID: PMC9190018 DOI: 10.1016/j.jbc.2022.102036] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 05/09/2022] [Accepted: 05/10/2022] [Indexed: 12/05/2022] Open
Abstract
Serum- and glucocorticoid-regulated kinase 1 (SGK1) is a serine/threonine kinase that plays important roles in the cellular stress response. While SGK1 has been reported to restrain inflammatory immune responses, the molecular mechanisms involved remain elusive, especially in oral bacteria-induced inflammatory milieu. Here, we found that SGK1 curtails Porphyromonas gingivalis-induced inflammatory responses through maintaining levels of tumor necrosis factor receptor-associated factor (TRAF) 3, thereby suppressing NF-κB signaling. Specifically, SGK1 inhibition significantly enhances production of proinflammatory cytokines, including tumor necrosis factor α, interleukin (IL)-6, IL-1β, and IL-8 in P. gingivalis-stimulated innate immune cells. The results were confirmed with siRNA and LysM-Cre-mediated SGK1 KO mice. Moreover, SGK1 deletion robustly increased NF-κB activity and c-Jun expression but failed to alter the activation of mitogen-activated protein kinase signaling pathways. Further mechanistic data revealed that SGK1 deletion elevates TRAF2 phosphorylation, leading to TRAF3 degradation in a proteasome-dependent manner. Importantly, siRNA-mediated traf3 silencing or c-Jun overexpression mimics the effect of SGK1 inhibition on P. gingivalis-induced inflammatory cytokines and NF-κB activation. In addition, using a P. gingivalis infection-induced periodontal bone loss model, we found that SGK1 inhibition modulates TRAF3 and c-Jun expression, aggravates inflammatory responses in gingival tissues, and exacerbates alveolar bone loss. Altogether, we demonstrated for the first time that SGK1 acts as a rheostat to limit P. gingivalis-induced inflammatory immune responses and mapped out a novel SGK1-TRAF2/3-c-Jun-NF-κB signaling axis. These findings provide novel insights into the anti-inflammatory molecular mechanisms of SGK1 and suggest novel interventional targets to inflammatory diseases relevant beyond the oral cavity.
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Affiliation(s)
- Xiao Han
- Department of Oral and Craniofacial Molecular Biology, VCU Philips Institute for Oral Health Research, Virginia Commonwealth University, Richmond, Virginia, USA
| | - Junling Ren
- Department of Oral and Craniofacial Molecular Biology, VCU Philips Institute for Oral Health Research, Virginia Commonwealth University, Richmond, Virginia, USA
| | - Hannah Lohner
- Department of Oral and Craniofacial Molecular Biology, VCU Philips Institute for Oral Health Research, Virginia Commonwealth University, Richmond, Virginia, USA
| | - Lan Yakoumatos
- Department of Oral Immunology and Infectious Diseases, University of Louisville, Louisville, Kentucky, USA
| | - Ruqiang Liang
- Department of Biochemistry and Molecular Medicine, University of California, Davis, Davis, California, USA
| | - Huizhi Wang
- Department of Oral and Craniofacial Molecular Biology, VCU Philips Institute for Oral Health Research, Virginia Commonwealth University, Richmond, Virginia, USA.
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23
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Sluchanko NN. Recent advances in structural studies of 14-3-3 protein complexes. ADVANCES IN PROTEIN CHEMISTRY AND STRUCTURAL BIOLOGY 2022; 130:289-324. [PMID: 35534110 DOI: 10.1016/bs.apcsb.2021.12.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Being phosphopeptide-binding hubs, 14-3-3 proteins coordinate multiple cellular processes in eukaryotes, including the regulation of apoptosis, cell cycle, ion channels trafficking, transcription, signal transduction, and hormone biosynthesis. Forming constitutive α-helical dimers, 14-3-3 proteins predominantly recognize specifically phosphorylated Ser/Thr sites within their partners; this generally stabilizes phosphotarget conformation and affects its activity, intracellular distribution, dephosphorylation, degradation and interactions with other proteins. Not surprisingly, 14-3-3 complexes are involved in the development of a range of diseases and are considered promising drug targets. The wide interactome of 14-3-3 proteins encompasses hundreds of different phosphoproteins, for many of which the interaction is well-documented in vitro and in vivo but lack the structural data that would help better understand underlying regulatory mechanisms and develop new drugs. Despite obtaining structural information on 14-3-3 complexes is still lagging behind the research of 14-3-3 interactions on a proteome-wide scale, recent works provided some advances, including methodological improvements and accumulation of new interesting structural data, that are discussed in this review.
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Affiliation(s)
- Nikolai N Sluchanko
- A.N. Bach Institute of Biochemistry, Federal Research Center "Fundamentals of Biotechnology" of the Russian Academy of Sciences, Moscow, Russian Federation.
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24
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Liu L, Zhang C, Qu S, Liu R, Chen H, Liang Z, Tian Z, Li L, Ma S, Liu X. ESR1 inhibits ionizing radiation-induced ferroptosis in breast cancer cells via the NEDD4L/CD71 pathway. Arch Biochem Biophys 2022; 725:109299. [DOI: 10.1016/j.abb.2022.109299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Revised: 05/18/2022] [Accepted: 05/19/2022] [Indexed: 11/02/2022]
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25
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Lacoursiere RE, Hadi D, Shaw GS. Acetylation, Phosphorylation, Ubiquitination (Oh My!): Following Post-Translational Modifications on the Ubiquitin Road. Biomolecules 2022; 12:biom12030467. [PMID: 35327659 PMCID: PMC8946176 DOI: 10.3390/biom12030467] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 03/11/2022] [Accepted: 03/14/2022] [Indexed: 02/06/2023] Open
Abstract
Ubiquitination is controlled by a series of E1, E2, and E3 enzymes that can ligate ubiquitin to cellular proteins and dictate the turnover of a substrate and the outcome of signalling events such as DNA damage repair and cell cycle. This process is complex due to the combinatorial power of ~35 E2 and ~1000 E3 enzymes involved and the multiple lysine residues on ubiquitin that can be used to assemble polyubiquitin chains. Recently, mass spectrometric methods have identified that most enzymes in the ubiquitination cascade can be further modified through acetylation or phosphorylation under particular cellular conditions and altered modifications have been noted in different cancers and neurodegenerative diseases. This review provides a cohesive summary of ubiquitination, acetylation, and phosphorylation sites in ubiquitin, the human E1 enzyme UBA1, all E2 enzymes, and some representative E3 enzymes. The potential impacts these post-translational modifications might have on each protein function are highlighted, as well as the observations from human disease.
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26
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The Role of NEDD4 E3 Ubiquitin–Protein Ligases in Parkinson’s Disease. Genes (Basel) 2022; 13:genes13030513. [PMID: 35328067 PMCID: PMC8950476 DOI: 10.3390/genes13030513] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 03/03/2022] [Indexed: 01/25/2023] Open
Abstract
Parkinson’s disease (PD) is a debilitating neurodegenerative disease that causes a great clinical burden. However, its exact molecular pathologies are not fully understood. Whilst there are a number of avenues for research into slowing, halting, or reversing PD, one central idea is to enhance the clearance of the proposed aetiological protein, oligomeric α-synuclein. Oligomeric α-synuclein is the main constituent protein in Lewy bodies and neurites and is considered neurotoxic. Multiple E3 ubiquitin-protein ligases, including the NEDD4 (neural precursor cell expressed developmentally downregulated protein 4) family, parkin, SIAH (mammalian homologues of Drosophila seven in absentia), CHIP (carboxy-terminus of Hsc70 interacting protein), and SCFFXBL5 SCF ubiquitin ligase assembled by the S-phase kinase-associated protein (SKP1), cullin-1 (Cul1), a zinc-binding RING finger protein, and the F-box domain/Leucine-rich repeat protein 5-containing protein FBXL5), have been shown to be able to ubiquitinate α-synuclein, influencing its subsequent degradation via the proteasome or lysosome. Here, we explore the link between NEDD4 ligases and PD, which is not only via α-synuclein but further strengthened by several additional substrates and interaction partners. Some members of the NEDD4 family of ligases are thought to crosstalk even with PD-related genes and proteins found to be mutated in familial forms of PD. Mutations in NEDD4 family genes have not been observed in PD patients, most likely because of their essential survival function during development. Following further in vivo studies, it has been thought that NEDD4 ligases may be viable therapeutic targets in PD. NEDD4 family members could clear toxic proteins, enhancing cell survival and slowing disease progression, or might diminish beneficial proteins, reducing cell survival and accelerating disease progression. Here, we review studies to date on the expression and function of NEDD4 ubiquitin ligases in the brain and their possible impact on PD pathology.
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27
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Somsen BA, Ottmann C. Facing the challenges of studying 14-3-3 protein-protein interactions with full length protein partners. Biophys J 2022; 121:1115-1116. [PMID: 35320703 PMCID: PMC9034296 DOI: 10.1016/j.bpj.2022.03.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 03/03/2022] [Accepted: 03/07/2022] [Indexed: 11/28/2022] Open
Affiliation(s)
- Bente A Somsen
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Eindhoven University of Technology, Eindhoven, the Netherlands
| | - Christian Ottmann
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Eindhoven University of Technology, Eindhoven, the Netherlands.
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28
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Joshi R, Pohl P, Strachotova D, Herman P, Obsil T, Obsilova V. Nedd4-2 binding to 14-3-3 modulates the accessibility of its catalytic site and WW domains. Biophys J 2022; 121:1299-1311. [PMID: 35189105 PMCID: PMC9034186 DOI: 10.1016/j.bpj.2022.02.025] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 11/30/2021] [Accepted: 02/15/2022] [Indexed: 11/02/2022] Open
Abstract
Neural precursor cells expressed developmentally downregulated protein 4-2 (Nedd4-2), a homologous to the E6-AP carboxyl terminus (HECT) ubiquitin ligase, triggers the endocytosis and degradation of its downstream target molecules by regulating signal transduction through interactions with other targets, including 14-3-3 proteins. In our previous study, we found that 14-3-3 binding induces a structural rearrangement of Nedd4-2 by inhibiting interactions between its structured domains. Here, we used time-resolved fluorescence intensity and anisotropy decay measurements, together with fluorescence quenching and mass spectrometry, to further characterize interactions between Nedd4-2 and 14-3-3 proteins. The results showed that 14-3-3 binding affects the emission properties of AEDANS-labeled WW3, WW4, and, to a lesser extent, WW2 domains, and reduces their mobility, but not those of the WW1 domain, which remains mobile. In contrast, 14-3-3 binding has the opposite effect on the active site of the HECT domain, which is more solvent exposed and mobile in the complexed form than in the apo form of Nedd4-2. Overall, our results suggest that steric hindrance of the WW3 and WW4 domains combined with conformational changes in the catalytic domain may account for the 14-3-3 binding-mediated regulation of Nedd4-2.
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