1
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Sunami Y, Yoshino S, Yamazaki Y, Iwamoto T, Nakamura T. Rapid increase of C/EBPα p42 induces growth arrest of acute myeloid leukemia (AML) cells by Cop1 deletion in Trib1-expressing AML. Leukemia 2024:10.1038/s41375-024-02430-4. [PMID: 39367171 DOI: 10.1038/s41375-024-02430-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2024] [Revised: 09/26/2024] [Accepted: 09/27/2024] [Indexed: 10/06/2024]
Abstract
Cop1 encodes a ubiquitin E3 ligase that has been well preserved during evolution in both plants and metazoans. In metazoans, the C/EBP family transcription factors are targets for degradation by Cop1, and this process is regulated by the Tribbles pseudokinase family. Over-expression of Tribbles homolog 1 (Trib1) induces acute myeloid leukemia (AML) via Cop1-dependent degradation of the C/EBPα p42 isoform. Here, we induced rapid growth arrest and granulocytic differentiation of Trib1-expressing AML cells using a Cop1 conditional knockout (KO), which is associated with a transient increase in the C/EBPα p42 isoform. The growth-suppressive effect of Cop1 KO was canceled by silencing of Cebpa and reinforced by exogenous expression of the p42 isoform. Moreover, Cop1 KO improved the survival of recipients transplanted with Trib1-expressing AML cells. We further identified a marked increase in Trib1 protein expression in Cop1 KO, indicating that Trib1 is self-degraded by the Cop1 degradosome. COP1 downregulation also inhibits the proliferation of human AML cells in a TRIB1-dependent manner. Taken together, our results provide new insights into the role of Trib1/Cop1 machinery in the C/EBPα p42-dependent leukemogenic activity, and a novel idea to develop new therapeutics.
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Affiliation(s)
- Yoshitaka Sunami
- Department of Experimental Pathology, Institute of Medical Science, Tokyo Medical University, Tokyo, Japan
| | - Seiko Yoshino
- Department of Molecular Oncology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yukari Yamazaki
- Department of Experimental Pathology, Institute of Medical Science, Tokyo Medical University, Tokyo, Japan
| | - Takashi Iwamoto
- Department of Experimental Pathology, Institute of Medical Science, Tokyo Medical University, Tokyo, Japan
| | - Takuro Nakamura
- Department of Experimental Pathology, Institute of Medical Science, Tokyo Medical University, Tokyo, Japan.
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2
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Deng Y, Ding W, Ma K, Zhan M, Sun L, Zhou Z, Lu L. SPOP point mutations regulate substrate preference and affect its function. Cell Death Dis 2024; 15:172. [PMID: 38409107 PMCID: PMC10897488 DOI: 10.1038/s41419-024-06565-1] [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: 09/18/2023] [Revised: 02/14/2024] [Accepted: 02/15/2024] [Indexed: 02/28/2024]
Abstract
The adaptor SPOP recruits substrates to CUL3 E3 ligase for ubiquitination and degradation. Structurally, SPOP harbors a MATH domain for substrate recognition, and a BTB domain responsible for binding CUL3. Reported point mutations always occur in SPOP's MATH domain and are through to disrupt affinities of SPOP to substrates, thereby leading to tumorigenesis. In this study, we identify the tumor suppressor IRF2BP2 as a novel substrate of SPOP. SPOP enables to attenuate IRF2BP2-inhibited cell proliferation and metastasis in HCC cells. However, overexpression of wild-type SPOP alone suppresses HCC cell proliferation and metastasis. In addition, a HCC-derived mutant, SPOP-M35L, shows an increased affinity to IRF2BP2 in comparison with wild-type SPOP. SPOP-M35L promotes HCC cell proliferation and metastasis, suggesting that M35L mutation possibly reprograms SPOP from a tumor suppressor to an oncoprotein. Taken together, this study uncovers mutations in SPOP's MATH lead to distinct functional consequences in context-dependent manners, rather than simply disrupting its interactions with substrates, raising a noteworthy concern that we should be prudent to select SPOP as therapeutic target for cancers.
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Affiliation(s)
- Yanran Deng
- Jiangsu Key laboratory of Drug Screening, China Pharmaceutical University, 210009, Nanjing, China
- Key Laboratory of Biodiversity Conservation and Bioresource Utilization of Jiangxi Province, College of Life Sciences, Jiangxi Normal University, 330022, Nanchang, China
| | - Wenhao Ding
- College of Life Sciences, Shandong Agricultural University, 271018, Tai'an, China
| | - Kaize Ma
- College of Life Sciences, Shandong Agricultural University, 271018, Tai'an, China
| | - Meixiao Zhan
- Guangdong Provincial Key Laboratory of Tumor Interventional Diagnosis and Treatment, Zhuhai People's Hospital (Zhuhai Hospital Affiliated with Jinan University), 519000, Zhuhai, Guangdong, China
| | - Li Sun
- Jiangsu Key laboratory of Drug Screening, China Pharmaceutical University, 210009, Nanjing, China.
| | - Zizhang Zhou
- Key Laboratory of Biodiversity Conservation and Bioresource Utilization of Jiangxi Province, College of Life Sciences, Jiangxi Normal University, 330022, Nanchang, China.
- College of Life Sciences, Shandong Agricultural University, 271018, Tai'an, China.
| | - Ligong Lu
- Guangdong Provincial Key Laboratory of Tumor Interventional Diagnosis and Treatment, Zhuhai People's Hospital (Zhuhai Hospital Affiliated with Jinan University), 519000, Zhuhai, Guangdong, China.
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3
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Fu AB, Xiang SF, He QJ, Ying MD. Kelch-like proteins in the gastrointestinal tumors. Acta Pharmacol Sin 2023; 44:931-939. [PMID: 36266566 PMCID: PMC10104798 DOI: 10.1038/s41401-022-01007-0] [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: 04/16/2022] [Accepted: 09/22/2022] [Indexed: 11/08/2022] Open
Abstract
Gastrointestinal tumors have become a worldwide health problem with high morbidity and poor clinical outcomes. Chemotherapy and surgery, the main treatment methods, are still far from meeting the treatment needs of patients, and targeted therapy is in urgent need of development. Recently, emerging evidence suggests that kelch-like (KLHL) proteins play essential roles in maintaining proteostasis and are involved in the progression of various cancers, functioning as adaptors in the E3 ligase complex and promoting the specific degradation of substrates. Therefore, KLHL proteins should be taken into consideration for targeted therapy strategy discovery. This review summarizes the current knowledge of KLHL proteins in gastrointestinal tumors and discusses the potential of KLHL proteins as potential drug targets and prognostic biomarkers.
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Affiliation(s)
- An-Bo Fu
- Institute of Pharmacology and Toxicology, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China
- Institute of Gastroenterology, Zhejiang University, Hangzhou, 310002, China
- Department of Gastroenterology, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 310002, China
| | - Sen-Feng Xiang
- Institute of Pharmacology and Toxicology, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China.
| | - Qiao-Jun He
- Institute of Pharmacology and Toxicology, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China.
- Cancer Center, Zhejiang University, Hangzhou, 310058, China.
| | - Mei-Dan Ying
- Institute of Pharmacology and Toxicology, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China.
- Cancer Center, Zhejiang University, Hangzhou, 310058, China.
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4
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Deng Y, Peng D, Xiao J, Zhao Y, Ding W, Yuan S, Sun L, Ding J, Zhou Z, Zhan M. Inhibition of the transcription factor ZNF281 by SUFU to suppress tumor cell migration. Cell Death Differ 2023; 30:702-715. [PMID: 36220888 PMCID: PMC9984498 DOI: 10.1038/s41418-022-01073-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 09/28/2022] [Accepted: 09/29/2022] [Indexed: 03/05/2023] Open
Abstract
Although the Hedgehog (Hh) pathway plays an evolutionarily conserved role from Drosophila to mammals, some divergences also exist. Loss of Sufu, an important component of the Hh pathway, does not lead to an obvious developmental defect in Drosophila. However, in mammals, loss of SUFU results in serious disorder, even various cancers. This divergence suggests that SUFU plays additional roles in mammalian cells, besides regulating the Hh pathway. Here, we identify that the transcription factor ZNF281 is a novel binding partner of SUFU. Intriguingly, the Drosophila genome does not encode any homologs of ZNF281. SUFU is able to suppress ZNF281-induced tumor cell migration and DNA damage repair by inhibiting ZNF281 activity. Mechanistically, SUFU binds ZNF281 to mask the nuclear localization signal of ZNF281, culminating in ZNF281 cytoplasmic retention. In addition, SUFU also hampers the interactions between ZNF281 and promoters of target genes. Finally, we show that SUFU is able to inhibit ZNF281-induced tumor cell migration using an in vivo model. Taken together, these results uncover a Hh-independent mechanism of SUFU exerting the anti-tumor role, in which SUFU suppresses tumor cell migration through antagonizing ZNF281. Therefore, this study provides a possible explanation for the functional divergence of SUFU in mammals and Drosophila.
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Affiliation(s)
- Yanran Deng
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, 210009, Nanjing, China
| | - Dezhen Peng
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, 210009, Nanjing, China
| | - Jing Xiao
- Center of Intervention radiology, Zhuhai Precision Medicine Center, Zhuhai People's Hospital, 519000, Zhuhai, China
| | - Yunhe Zhao
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, 271018, Tai'an, China
| | - Wenhao Ding
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, 271018, Tai'an, China
| | - Shengtao Yuan
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, 210009, Nanjing, China
| | - Li Sun
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, 210009, Nanjing, China
| | - Jian Ding
- Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, 210009, Nanjing, China.
- Division of Antitumor Pharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 201203, Shanghai, China.
| | - Zizhang Zhou
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, 271018, Tai'an, China.
| | - Meixiao Zhan
- Center of Intervention radiology, Zhuhai Precision Medicine Center, Zhuhai People's Hospital, 519000, Zhuhai, China.
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5
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Cavalcante IP, Berthon A, Fragoso MC, Reincke M, Stratakis CA, Ragazzon B, Bertherat J. Primary bilateral macronodular adrenal hyperplasia: definitely a genetic disease. Nat Rev Endocrinol 2022; 18:699-711. [PMID: 35922573 DOI: 10.1038/s41574-022-00718-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/30/2022] [Indexed: 11/08/2022]
Abstract
Primary bilateral macronodular adrenal hyperplasia (PBMAH) is an adrenal cause of Cushing syndrome. Nowadays, a PBMAH diagnosis is more frequent than previously, as a result of progress in the diagnostic methods for adrenal incidentalomas, which are widely available. Although some rare syndromic forms of PBMAH are known to be of genetic origin, non-syndromic forms of PBMAH have only been recognized as a genetic disease in the past 10 years. Genomics studies have highlighted the molecular heterogeneity of PBMAH and identified molecular subgroups, allowing improved understanding of the clinical heterogeneity of this disease. Furthermore, the generation of these subgroups permitted the identification of new genes responsible for PBMAH. Constitutive inactivating variants in ARMC5 and KDM1A are responsible for the development of distinct forms of PBMAH. To date, pathogenic variants of ARMC5 are responsible for 20-25% of PBMAH, whereas germline KDM1A alterations have been identified in >90% of PBMAH causing food-dependent Cushing syndrome. The identification of pathogenic variants in ARMC5 and KDM1A demonstrated that PBMAH, despite mostly being diagnosed in adults aged 45-60 years, is a genetic disorder. This Review summarizes the important progress made in the past 10 years in understanding the genetics of PBMAH, which have led to a better understanding of the pathophysiology, opening new clinical perspectives.
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Affiliation(s)
- Isadora P Cavalcante
- Université Paris Cité, Institut Cochin, Inserm U1016, CNRS UMR8104, Paris, France
| | - Annabel Berthon
- Université Paris Cité, Institut Cochin, Inserm U1016, CNRS UMR8104, Paris, France
| | - Maria C Fragoso
- Department of Endocrinology, Adrenal Unit, University of Sao Paulo, Sao Paulo, Brazil
| | - Martin Reincke
- Medizinische Klinik und Poliklinik IV, LMU Klinikum, Ludwig-Maximilians-Universität München, München, Germany
| | | | - Bruno Ragazzon
- Université Paris Cité, Institut Cochin, Inserm U1016, CNRS UMR8104, Paris, France
| | - Jérôme Bertherat
- Department of Endocrinology and National Reference Center for Rare Adrenal Disorders, Hôpital Cochin, Assistance Publique Hôpitaux de Paris, Paris, France.
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6
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Ding Y, Wang G, Zhan M, Sun X, Deng Y, Zhao Y, Liu B, Liu Q, Wu S, Zhou Z. Hippo signaling suppresses tumor cell metastasis via a Yki-Src42A positive feedback loop. Cell Death Dis 2021; 12:1126. [PMID: 34862372 PMCID: PMC8642408 DOI: 10.1038/s41419-021-04423-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 11/11/2021] [Accepted: 11/23/2021] [Indexed: 12/22/2022]
Abstract
Metastasis is an important cause of death from malignant tumors. It is of great significance to explore the molecular mechanism of metastasis for the development of anti-cancer drugs. Here, we find that the Hippo pathway hampers tumor cell metastasis in vivo. Silence of hpo or its downstream wts promotes tumor cell migration in a Yki-dependent manner. Furthermore, we identify that inhibition of the Hippo pathway promotes tumor cell migration through transcriptional activating src42A, a Drosophila homolog of the SRC oncogene. Yki activates src42A transcription through direct binding its intron region. Intriguingly, Src42A further increases Yki transcriptional activity to form a positive feedback loop. Finally, we show that SRC is also a target of YAP and important for YAP to promote the migration of human hepatocellular carcinoma cells. Together, our findings uncover a conserved Yki/YAP-Src42A/SRC positive feedback loop promoting tumor cell migration and provide SRC as a potential therapeutic target for YAP-driven metastatic tumors.
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Affiliation(s)
- Yan Ding
- grid.440622.60000 0000 9482 4676State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, 271018 Tai’an, China
| | - Guiping Wang
- grid.216938.70000 0000 9878 7032Tianjin Key Laboratory of Protein Sciences, State Key Laboratory of Medical Chemical Biology, College of Life Sciences, Nankai University, 300071 Tianjin, China
| | - Meixiao Zhan
- grid.452930.90000 0004 1757 8087Center of Intervention radiology, Zhuhai Precision Medicine Center, Zhuhai People’s Hospital, 519000 Zhuhai, China
| | - Xiaohan Sun
- grid.440622.60000 0000 9482 4676State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, 271018 Tai’an, China
| | - Yanran Deng
- grid.254147.10000 0000 9776 7793Jiangsu Key laboratory of Drug Screening, China Pharmaceutical University, 210009 Nanjing, China
| | - Yunhe Zhao
- grid.440622.60000 0000 9482 4676State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, 271018 Tai’an, China
| | - Bin Liu
- grid.440622.60000 0000 9482 4676State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, 271018 Tai’an, China
| | - Qingxin Liu
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, 271018, Tai'an, China.
| | - Shian Wu
- Tianjin Key Laboratory of Protein Sciences, State Key Laboratory of Medical Chemical Biology, College of Life Sciences, Nankai University, 300071, Tianjin, China.
| | - Zizhang Zhou
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, 271018, Tai'an, China.
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7
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Liu B, Ding Y, Sun B, Liu Q, Zhou Z, Zhan M. The Hh pathway promotes cell apoptosis through Ci-Rdx-Diap1 axis. Cell Death Discov 2021; 7:263. [PMID: 34561426 PMCID: PMC8463586 DOI: 10.1038/s41420-021-00653-3] [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: 06/17/2021] [Revised: 08/22/2021] [Accepted: 09/09/2021] [Indexed: 11/28/2022] Open
Abstract
Apoptosis is a strictly coordinated process to eliminate superfluous or damaged cells, and its deregulation leads to birth defects and various human diseases. The regulatory mechanism underlying apoptosis still remains incompletely understood. To identify novel components in apoptosis, we carry out a modifier screen and find that the Hh pathway aggravates Hid-induced apoptosis. In addition, we reveal that the Hh pathway triggers apoptosis through its transcriptional target gene rdx, which encodes an E3 ubiquitin ligase. Rdx physically binds Diap1 to promote its K63-linked polyubiquitination, culminating in attenuating Diap1-Dronc interaction without affecting Diap1 stability. Taken together, our findings unexpectedly uncover the oncogenic Hh pathway is able to promote apoptosis through Ci-Rdx-Diap1 module, raising a concern to choose Hh pathway inhibitors as anti-tumor drugs.
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Affiliation(s)
- Bin Liu
- College of Life Sciences, Shandong Agricultural University, Tai'an, China
| | - Yan Ding
- College of Life Sciences, Shandong Agricultural University, Tai'an, China
| | - Bing Sun
- Department of Anorectum, the First affiliated Hospital of Shandong First Medical University, Ji'nan, China
| | - Qingxin Liu
- College of Life Sciences, Shandong Agricultural University, Tai'an, China
| | - Zizhang Zhou
- College of Life Sciences, Shandong Agricultural University, Tai'an, China.
| | - Meixiao Zhan
- Zhuhai Interventional Medical Center, Zhuhai Precision Medical Center, Zhuhai People's Hospital, Zhuhai Hospital Affiliated with Jinan University, Zhuhai, China.
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8
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Young BD, Sha J, Vashisht AA, Wohlschlegel JA. Human Multisubunit E3 Ubiquitin Ligase Required for Heterotrimeric G-Protein β-Subunit Ubiquitination and Downstream Signaling. J Proteome Res 2021; 20:4318-4330. [PMID: 34342229 DOI: 10.1021/acs.jproteome.1c00292] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
G-protein-coupled receptors (GPCRs) initiate intracellular signaling events through heterotrimeric G-protein α-subunits (Gα) and the βγ-subunit dimer (Gβγ). In this study, we utilized mass spectrometry to identify novel regulators of Gβγ signaling in human cells. This prompted our characterization of KCTD2 and KCTD5, two related potassium channel tetramerization domain (KCTD) proteins that specifically recognize Gβγ. We demonstrated that these KCTD proteins are substrate adaptors for a multisubunit CUL3-RING ubiquitin ligase, in which a KCTD2-KCTD5 hetero-oligomer associates with CUL3 through KCTD5 subunits and recruits Gβγ through both KCTD proteins in response to G-protein activation. These KCTD proteins promote monoubiquitination of lysine-23 within Gβ1/2 in vitro and in HEK-293 cells. Depletion of these adaptors from cancer cell lines sharply impairs downstream signaling. Together, our studies suggest that a KCTD2-KCTD5-CUL3-RING E3 ligase recruits Gβγ in response to signaling, monoubiquitinates lysine-23 within Gβ1/2, and regulates Gβγ effectors to modulate downstream signal transduction.
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Affiliation(s)
- Brian D Young
- Department of Biological Chemistry, David Geffen School of Medicine, UCLA, Los Angeles, California 90095, United States.,Molecular Biology Institute, David Geffen School of Medicine, UCLA, Los Angeles, California 90095, United States
| | - Jihui Sha
- Department of Biological Chemistry, David Geffen School of Medicine, UCLA, Los Angeles, California 90095, United States
| | - Ajay A Vashisht
- Department of Biological Chemistry, David Geffen School of Medicine, UCLA, Los Angeles, California 90095, United States
| | - James A Wohlschlegel
- Department of Biological Chemistry, David Geffen School of Medicine, UCLA, Los Angeles, California 90095, United States.,Molecular Biology Institute, David Geffen School of Medicine, UCLA, Los Angeles, California 90095, United States
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9
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Li Y, Sun X, Gao D, Ding Y, Liu J, Chen J, Luo J, Zhang J, Liu Q, Zhou Z. Dual functions of Rack1 in regulating Hedgehog pathway. Cell Death Differ 2020; 27:3082-3096. [PMID: 32467643 PMCID: PMC7560836 DOI: 10.1038/s41418-020-0563-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2019] [Revised: 05/12/2020] [Accepted: 05/13/2020] [Indexed: 01/20/2023] Open
Abstract
Hedgehog (Hh) pathway plays multiple roles in many physiological processes and its dysregulation leads to congenital disorders and cancers. Hh regulates the cellular localization of Smoothened (Smo) and the stability of Cubitus interruptus (Ci) to fine-tune the signal outputs. However, the underlying mechanisms are still unclear. Here, we show that the scaffold protein Rack1 plays dual roles in Hh signaling. In the absence of Hh, Rack1 promotes Ci and Cos2 to form a Ci–Rack1–Cos2 complex, culminating in Slimb-mediated Ci proteolysis. In the presence of Hh, Rack1 dissociates from Ci–Rack1–Cos2 complex and forms a trimeric complex with Smo and Usp8, leading to Smo deubiquitination and cell surface accumulation. Furthermore, we find the regulation of Rack1 on Hh pathway is conserved from Drosophila to mammalian cells. Our findings demonstrate that Rack1 plays dual roles during Hh signal transduction and provide Rack1 as a potential drug target for Hh-related diseases.
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Affiliation(s)
- Yan Li
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, 271018, Tai'an, China
| | - Xiaohan Sun
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, 271018, Tai'an, China
| | - Dongqing Gao
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, 271018, Tai'an, China
| | - Yan Ding
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, 271018, Tai'an, China
| | - Jinxiao Liu
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, 271018, Tai'an, China
| | - Jiong Chen
- State Key Laboratory of Pharmaceutical Biotechnology and MOE Key Laboratory of Model Animals for Disease Study, Model Animal Research Center, Nanjing University, 210061, Nanjing, China
| | - Jun Luo
- State Key Laboratory of Pharmaceutical Biotechnology and MOE Key Laboratory of Model Animals for Disease Study, Model Animal Research Center, Nanjing University, 210061, Nanjing, China
| | - Junzheng Zhang
- Department of Entomology and MOA Key Lab of Pest Monitoring and Green Management, College of Plant Protection, China Agricultural University, 100094, Beijing, China
| | - Qingxin Liu
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, 271018, Tai'an, China.
| | - Zizhang Zhou
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, 271018, Tai'an, China.
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10
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CUL3 BPM E3 ubiquitin ligases regulate MYC2, MYC3, and MYC4 stability and JA responses. Proc Natl Acad Sci U S A 2020; 117:6205-6215. [PMID: 32123086 DOI: 10.1073/pnas.1912199117] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
The jasmonate (JA)-pathway regulators MYC2, MYC3, and MYC4 are central nodes in plant signaling networks integrating environmental and developmental signals to fine-tune JA defenses and plant growth. Continuous activation of MYC activity is potentially lethal. Hence, MYCs need to be tightly regulated in order to optimize plant fitness. Among the increasing number of mechanisms regulating MYC activity, protein stability is arising as a major player. However, how the levels of MYC proteins are modulated is still poorly understood. Here, we report that MYC2, MYC3, and MYC4 are targets of BPM (BTB/POZ-MATH) proteins, which act as substrate adaptors of CUL3-based E3 ubiquitin ligases. Reduction of function of CUL3BPM in amiR-bpm lines, bpm235 triple mutants, and cul3ab double mutants enhances MYC2 and MYC3 stability and accumulation and potentiates plant responses to JA such as root-growth inhibition and MYC-regulated gene expression. Moreover, MYC3 polyubiquitination levels are reduced in amiR-bpm lines. BPM3 protein is stabilized by JA, suggesting a negative feedback regulatory mechanism to control MYC activity, avoiding harmful runaway responses. Our results uncover a layer for JA-pathway regulation by CUL3BPM-mediated degradation of MYC transcription factors.
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11
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Zhou Z, Yao X, Pang S, Chen P, Jiang W, Shan Z, Zhang Q. The deubiquitinase UCHL5/UCH37 positively regulates Hedgehog signaling by deubiquitinating Smoothened. J Mol Cell Biol 2019; 10:243-257. [PMID: 28992318 DOI: 10.1093/jmcb/mjx036] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2017] [Accepted: 08/21/2017] [Indexed: 01/20/2023] Open
Abstract
The Hedgehog (Hh) signaling pathway plays important roles in developmental processes including pattern formation and tissue homeostasis. The seven-pass transmembrane receptor Smoothened (Smo) is the pivotal transducer in the pathway; it, and thus the pathway overall, is regulated by ubiquitin-mediated degradation, which occurs in the absence of Hh. In the presence of Hh, the ubiquitination levels of Smo are decreased, but the molecular basis for this outcome is not well understood. Here, we identify the deubiquitinase UCHL5 as a positive regulator of the Hh pathway. We provide both genetic and biochemical evidence that UCHL5 interacts with and deubiquitinates Smo, increasing stability and promoting accumulation at the cell membrane. Strikingly, we find that Hh enhances the interaction between UCHL5 and Smo, thereby stabilizing Smo. We also find that proteasome subunit RPN13, an activator of UCHL5, could enhance the effect of UCHL5 on Smo protein level. More importantly, we find that the mammalian counterpart of UCHL5, UCH37, plays the same role in the regulation of Hh signaling by modulating hSmo ubiquitination and stability. Our findings thus identify UCHL5/UCH37 as a critical regulator of Hh signaling and potential therapeutic target for cancers.
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Affiliation(s)
- Zizhang Zhou
- State Key Laboratory of Pharmaceutical Biotechnology and MOE Key Laboratory of Model Animals for Disease Study, Model Animal Research Center of Nanjing University, Nanjing, China.,Collaborative Innovation Center of Genetics and Development, Shanghai, China
| | - Xia Yao
- State Key Laboratory of Pharmaceutical Biotechnology and MOE Key Laboratory of Model Animals for Disease Study, Model Animal Research Center of Nanjing University, Nanjing, China.,Collaborative Innovation Center of Genetics and Development, Shanghai, China
| | - Shu Pang
- State Key Laboratory of Pharmaceutical Biotechnology and MOE Key Laboratory of Model Animals for Disease Study, Model Animal Research Center of Nanjing University, Nanjing, China.,Collaborative Innovation Center of Genetics and Development, Shanghai, China
| | - Ping Chen
- State Key Laboratory of Pharmaceutical Biotechnology and MOE Key Laboratory of Model Animals for Disease Study, Model Animal Research Center of Nanjing University, Nanjing, China.,Collaborative Innovation Center of Genetics and Development, Shanghai, China
| | - Weirong Jiang
- State Key Laboratory of Pharmaceutical Biotechnology and MOE Key Laboratory of Model Animals for Disease Study, Model Animal Research Center of Nanjing University, Nanjing, China.,Collaborative Innovation Center of Genetics and Development, Shanghai, China
| | - Zhaoliang Shan
- State Key Laboratory of Pharmaceutical Biotechnology and MOE Key Laboratory of Model Animals for Disease Study, Model Animal Research Center of Nanjing University, Nanjing, China.,Collaborative Innovation Center of Genetics and Development, Shanghai, China
| | - Qing Zhang
- State Key Laboratory of Pharmaceutical Biotechnology and MOE Key Laboratory of Model Animals for Disease Study, Model Animal Research Center of Nanjing University, Nanjing, China.,Collaborative Innovation Center of Genetics and Development, Shanghai, China
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Usp7 regulates Hippo pathway through deubiquitinating the transcriptional coactivator Yorkie. Nat Commun 2019; 10:411. [PMID: 30679505 PMCID: PMC6345853 DOI: 10.1038/s41467-019-08334-7] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2018] [Accepted: 01/03/2019] [Indexed: 12/13/2022] Open
Abstract
The Hippo pathway plays an important role in organ development and adult tissue homeostasis, and its deregulation has been implicated in many cancers. The Hippo signaling relies on a core kinase cascade culminating in phosphorylation of the transcription coactivator Yorkie (Yki). Although Yki is the key effector of Hippo pathway, the regulation of its protein stability is still unclear. Here, we show that Hippo pathway attenuates the binding of a ubiquitin-specific protease Usp7 to Yki, which regulates Hippo signaling through deubiquitinating Yki. Furthermore, the mammalian homolog of Usp7, HAUSP plays a conserved role in regulating Hippo pathway by modulating Yap ubiquitination and degradation. Finally, we find that the expression of HAUSP is positively correlated with that of Yap, both showing upregulated levels in clinical hepatocellular carcinoma (HCC) specimens. In summary, our findings demonstrate that Yki/Yap is stabilized by Usp7/HAUSP, and provide HAUSP as a potential therapeutic target for HCC. Hippo signaling leads to the phosphorylation of the key transcriptional effector, Yap/Yki, although how Yap/Yki stability is regulated has remained unclear. Here, Sun et al. identify HAUSP/Usp7 as a conserved and clinically relevant regulator of the Hippo pathway that increases Yap/Yki stability.
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Shen X, Sun X, Sun B, Li T, Wu G, Li Y, Chen L, Liu Q, Cui M, Zhou Z. ARRDC3 suppresses colorectal cancer progression through destabilizing the oncoprotein YAP. FEBS Lett 2018; 592:599-609. [PMID: 29364502 DOI: 10.1002/1873-3468.12986] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 01/16/2018] [Accepted: 01/17/2018] [Indexed: 01/12/2023]
Affiliation(s)
- Xu Shen
- College of Life Sciences Shandong Agricultural University Tai'an Shandong China
| | - Xiaohan Sun
- College of Life Sciences Shandong Agricultural University Tai'an Shandong China
| | - Bing Sun
- Department of Anorectum Qianfo Mount Hospital affiliated to Shandong University Ji'nan Shandong China
| | - Tao Li
- Department of Anorectum Qianfo Mount Hospital affiliated to Shandong University Ji'nan Shandong China
| | - Guoliang Wu
- Department of Anorectum Qianfo Mount Hospital affiliated to Shandong University Ji'nan Shandong China
| | - Yuantao Li
- Department of Anorectum Qianfo Mount Hospital affiliated to Shandong University Ji'nan Shandong China
| | - Lai Chen
- Jiangxi University of Traditional Chinese Medicine Nanchang China
| | - Qingxin Liu
- College of Life Sciences Shandong Agricultural University Tai'an Shandong China
| | - Meng Cui
- Department of Anorectum Qianfo Mount Hospital affiliated to Shandong University Ji'nan Shandong China
| | - Zizhang Zhou
- College of Life Sciences Shandong Agricultural University Tai'an Shandong China
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14
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Wang XF, Shen Y, Cheng Q, Fu CL, Zhou ZZ, Hirose S, Liu QX. Apontic directly activates hedgehog and cyclin E for proper organ growth and patterning. Sci Rep 2017; 7:12470. [PMID: 28963499 PMCID: PMC5622130 DOI: 10.1038/s41598-017-12766-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Accepted: 09/14/2017] [Indexed: 11/09/2022] Open
Abstract
Hedgehog (Hh) signaling pathway and Cyclin E are key players in cell proliferation and organ development. Hyperactivation of hh and cyclin E has been linked to several types of cancer. However, coordination of the expression of hh and cyclin E was not well understood. Here we show that an evolutionarily conserved transcription factor Apontic (Apt) directly activates hh and cyclin E through its binding site in the promoter regions of hh and cyclin E. This Apt-dependent proper expression of hh and cyclin E is required for cell proliferation and development of the Drosophila wing. Furthermore, Fibrinogen silencer-binding protein (FSBP), a mammalian homolog of Apt, also positively regulates Sonic hh (Shh), Desert hh (Dhh), Cyclin E1 (CCNE1) and Cyclin E2 (CCNE2) in cultured human cells, suggesting evolutionary conservation of the mechanism. Apt-mediated expression of hh and cyclin E can direct proliferation of Hh-expressing cells and simultaneous growth, patterning and differentiation of Hh-recipient cells. The discovery of the simultaneous expression of Hh and principal cell-cycle regulator Cyclin E by Apt implicates insight into the mechanism by which deregulated hh and cyclin E promotes tumor formation.
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Affiliation(s)
- Xian-Feng Wang
- Laboratory of Developmental Genetics, Shandong Agricultural University, Tai'an, Shandong, 271018, China
| | - Yang Shen
- Laboratory of Developmental Genetics, Shandong Agricultural University, Tai'an, Shandong, 271018, China
| | - Qian Cheng
- Laboratory of Developmental Genetics, Shandong Agricultural University, Tai'an, Shandong, 271018, China
| | - Chong-Lei Fu
- Laboratory of Developmental Genetics, Shandong Agricultural University, Tai'an, Shandong, 271018, China
| | - Zi-Zhang Zhou
- Laboratory of Developmental Genetics, Shandong Agricultural University, Tai'an, Shandong, 271018, China
| | - Susumu Hirose
- Department of Developmental Genetics, National Institute of Genetics, Mishima, Shizuoka, 411-8540, Japan.
| | - Qing-Xin Liu
- Laboratory of Developmental Genetics, Shandong Agricultural University, Tai'an, Shandong, 271018, China.
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15
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The regulation of Jmjd3 upon the expression of NF-κB downstream inflammatory genes in LPS activated vascular endothelial cells. Biochem Biophys Res Commun 2017; 485:62-68. [DOI: 10.1016/j.bbrc.2017.02.020] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Accepted: 02/05/2017] [Indexed: 12/21/2022]
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16
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Zhan M, Sun X, Liu J, Li Y, Li Y, He X, Zhou Z, Lu L. Usp7 promotes medulloblastoma cell survival and metastasis by activating Shh pathway. Biochem Biophys Res Commun 2017; 484:429-434. [PMID: 28137592 DOI: 10.1016/j.bbrc.2017.01.144] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Accepted: 01/25/2017] [Indexed: 11/24/2022]
Abstract
The ubiquitin-specific protease Usp7 plays roles in multiple cellular processes through deubiquitinating and stabilizing numerous substrates, including P53, Pten and Gli. Aberrant Usp7 activity has been implicated in many disorders and tumorigenesis, making it as a potential target for therapeutic intervention. Although it is clear that Usp7 is involved in many types of cancer, its role in regulating medulloblastoma (MB) is still unknown. In this study, we show that knockdown of Usp7 inhibits the proliferation and migration of MB cells, while Usp7 overexpression exerts an opposite effect. Furthermore, we establish Usp7 knockout MB cell line using the CRISPR/Cas9 system and further confirm that Usp7 knockout also blocks MB cell proliferation and metastasis. In addition, we reveal that knockdown of Usp7 compromises Shh pathway activity and decrease Gli protein levels, while P53 level and P53 target gene expression have no obvious changes. Finally, we find that Usp7 inhibitors apparently inhibit MB cell viability and migration. Taken together, our findings suggest that Usp7 is important for MB cell proliferation and metastasis by activating Shh pathway, and is a putative therapeutic target for MBs.
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Affiliation(s)
- Meixiao Zhan
- Department of Interventional Oncology, Guangdong Provincial Cardiovascular Institute, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China; Zhuhai Precision Medicine Center, Zhuhai People's Hospital, Jinan University, Zhuhai, China
| | - Xiaohan Sun
- College of Life Sciences, Shandong Agricultural University, Taian, Shangdong, China
| | - Jinxiao Liu
- College of Life Sciences, Shandong Agricultural University, Taian, Shangdong, China
| | - Yan Li
- College of Life Sciences, Shandong Agricultural University, Taian, Shangdong, China
| | - Yong Li
- Department of Interventional Oncology, Guangdong Provincial Cardiovascular Institute, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China; Zhuhai Precision Medicine Center, Zhuhai People's Hospital, Jinan University, Zhuhai, China
| | - Xu He
- Zhuhai Precision Medicine Center, Zhuhai People's Hospital, Jinan University, Zhuhai, China
| | - Zizhang Zhou
- College of Life Sciences, Shandong Agricultural University, Taian, Shangdong, China.
| | - Ligong Lu
- Department of Interventional Oncology, Guangdong Provincial Cardiovascular Institute, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China; Zhuhai Precision Medicine Center, Zhuhai People's Hospital, Jinan University, Zhuhai, China.
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Regulation of the CUL3 Ubiquitin Ligase by a Calcium-Dependent Co-adaptor. Cell 2016; 167:525-538.e14. [DOI: 10.1016/j.cell.2016.09.026] [Citation(s) in RCA: 88] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2016] [Revised: 07/13/2016] [Accepted: 09/15/2016] [Indexed: 12/27/2022]
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