1
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Tavares S, Liv N, Pasolli M, Opdam M, Rätze MAK, Saornil M, Sluimer LM, Hengeveld RCC, van Es R, van Werkhoven E, Vos H, Rehmann H, Burgering BMT, Oosterkamp HM, Lens SMA, Klumperman J, Linn SC, Derksen PWB. FER regulates endosomal recycling and is a predictor for adjuvant taxane benefit in breast cancer. Cell Rep 2022; 39:110584. [PMID: 35385742 DOI: 10.1016/j.celrep.2022.110584] [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: 04/12/2021] [Revised: 10/28/2021] [Accepted: 03/07/2022] [Indexed: 11/18/2022] Open
Abstract
Elevated expression of non-receptor tyrosine kinase FER is an independent prognosticator that correlates with poor survival of high-grade and basal/triple-negative breast cancer (TNBC) patients. Here, we show that high FER levels are also associated with improved outcomes after adjuvant taxane-based combination chemotherapy in high-risk, HER2-negative patients. In TNBC cells, we observe a causal relation between high FER levels and sensitivity to taxanes. Proteomics and mechanistic studies demonstrate that FER regulates endosomal recycling, a microtubule-dependent process that underpins breast cancer cell invasion. Using chemical genetics, we identify DCTN2 as a FER substrate. Our work indicates that the DCTN2 tyrosine 6 is essential for the development of tubular recycling domains in early endosomes and subsequent propagation of TNBC cell invasion in 3D. In conclusion, we show that high FER expression promotes endosomal recycling and represents a candidate predictive marker for the benefit of adjuvant taxane-containing chemotherapy in high-risk patients, including TNBC patients.
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Affiliation(s)
- Sandra Tavares
- Department of Pathology, University Medical Center Utrecht, 3584CX Utrecht, the Netherlands
| | - Nalan Liv
- Section Cell Biology, Center for Molecular Medicine, University Medical Center Utrecht, 3584CX Utrecht, the Netherlands
| | - Milena Pasolli
- Cell Biology, Neurobiology, and Biophysics, Department of Biology, Faculty of Science, Utrecht University, 3584CH Utrecht, the Netherlands
| | - Mark Opdam
- Department of Molecular Pathology, Netherlands Cancer Institute, 1066CX Amsterdam, the Netherlands
| | - Max A K Rätze
- Department of Pathology, University Medical Center Utrecht, 3584CX Utrecht, the Netherlands
| | - Manuel Saornil
- Department of Pathology, University Medical Center Utrecht, 3584CX Utrecht, the Netherlands
| | - Lilian M Sluimer
- Department of Pathology, University Medical Center Utrecht, 3584CX Utrecht, the Netherlands
| | - Rutger C C Hengeveld
- Oncode Institute, Department of Molecular Cancer Research, University Medical Center Utrecht, 3584CX Utrecht, the Netherlands
| | - Robert van Es
- Oncode Institute, Department of Molecular Cancer Research, University Medical Center Utrecht, 3584CX Utrecht, the Netherlands
| | - Erik van Werkhoven
- Department of Molecular Pathology, Netherlands Cancer Institute, 1066CX Amsterdam, the Netherlands
| | - Harmjan Vos
- Oncode Institute, Department of Molecular Cancer Research, University Medical Center Utrecht, 3584CX Utrecht, the Netherlands
| | - Holger Rehmann
- Flensburg University of Applied Sciences, 24943 Flensburg, Germany
| | - Boudewijn M T Burgering
- Oncode Institute, Department of Molecular Cancer Research, University Medical Center Utrecht, 3584CX Utrecht, the Netherlands
| | - Hendrika M Oosterkamp
- Department of Medical Oncology, Haaglanden Medisch Centrum, 2501 CK The Hague, the Netherlands
| | - Susanne M A Lens
- Oncode Institute, Department of Molecular Cancer Research, University Medical Center Utrecht, 3584CX Utrecht, the Netherlands
| | - Judith Klumperman
- Section Cell Biology, Center for Molecular Medicine, University Medical Center Utrecht, 3584CX Utrecht, the Netherlands
| | - Sabine C Linn
- Department of Pathology, University Medical Center Utrecht, 3584CX Utrecht, the Netherlands; Department of Molecular Pathology, Netherlands Cancer Institute, 1066CX Amsterdam, the Netherlands; Department of Medical Oncology, Netherlands Cancer Institute, 1066CX Amsterdam, the Netherlands
| | - Patrick W B Derksen
- Department of Pathology, University Medical Center Utrecht, 3584CX Utrecht, the Netherlands.
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2
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Grinshtain E, Shpungin S, Baum M, Nir U, Breitbart H. The Fer tyrosine kinase protects sperm from spontaneous acrosome reaction. Dev Biol 2022; 487:24-33. [DOI: 10.1016/j.ydbio.2022.04.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 03/23/2022] [Accepted: 04/13/2022] [Indexed: 11/24/2022]
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3
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Yeung W, Ruan Z, Kannan N. Emerging roles of the αC-β4 loop in protein kinase structure, function, evolution, and disease. IUBMB Life 2020; 72:1189-1202. [PMID: 32101380 DOI: 10.1002/iub.2253] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Accepted: 02/07/2020] [Indexed: 12/11/2022]
Abstract
The faithful propagation of cellular signals in most organisms relies on the coordinated functions of a large family of protein kinases that share a conserved catalytic domain. The catalytic domain is a dynamic scaffold that undergoes large conformational changes upon activation. Most of these conformational changes, such as movement of the regulatory αC-helix from an "out" to "in" conformation, hinge on a conserved, but understudied, loop termed the αC-β4 loop, which mediates conserved interactions to tether flexible structural elements to the kinase core. We previously showed that the αC-β4 loop is a unique feature of eukaryotic protein kinases. Here, we review the emerging roles of this loop in kinase structure, function, regulation, and diseases. Through a kinome-wide analysis, we define the boundaries of the loop for the first time and show that sequence and structural variation in the loop correlate with conformational and regulatory variation. Many recurrent disease mutations map to the αC-β4 loop and contribute to drug resistance and abnormal kinase activation by relieving key auto-inhibitory interactions associated with αC-helix and inter-lobe movement. The αC-β4 loop is a hotspot for post-translational modifications, protein-protein interaction, and Hsp90 mediated folding. Our kinome-wide analysis provides insights for hypothesis-driven characterization of understudied kinases and the development of allosteric protein kinase inhibitors.
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Affiliation(s)
- Wayland Yeung
- Institute of Bioinformatics, University of Georgia, Athens, Georgia
| | - Zheng Ruan
- Institute of Bioinformatics, University of Georgia, Athens, Georgia
| | - Natarajan Kannan
- Institute of Bioinformatics, University of Georgia, Athens, Georgia.,Department of Biochemistry & Molecular Biology, University of Georgia, Athens, Georgia
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4
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Pfeiffer J, Tarbashevich K, Bandemer J, Palm T, Raz E. Rapid progression through the cell cycle ensures efficient migration of primordial germ cells - The role of Hsp90. Dev Biol 2018; 436:84-93. [PMID: 29477339 DOI: 10.1016/j.ydbio.2018.02.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Revised: 11/30/2017] [Accepted: 02/21/2018] [Indexed: 01/21/2023]
Abstract
Zebrafish primordial germ cells (PGCs) constitute a useful in vivo model to study cell migration and to elucidate the role of specific proteins in this process. Here we report on the role of the heat shock protein Hsp90aa1.2, a protein whose RNA level is elevated in the PGCs during their migration. Reducing Hsp90aa1.2 activity slows down the progression through the cell cycle and leads to defects in the control over the MTOC number in the migrating cells. These defects result in a slower migration rate and compromise the arrival of PGCs at their target, the region where the gonad develops. Our results emphasize the importance of ensuring rapid progression through the cell cycle during single-cell migration and highlight the role of heat shock proteins in the process.
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Affiliation(s)
- Jana Pfeiffer
- Institute of Cell Biology, Center for Molecular Biology of Inflammation, University of Münster, Von-Esmarch-Str. 56, 48149 Münster, Germany
| | - Katsiaryna Tarbashevich
- Institute of Cell Biology, Center for Molecular Biology of Inflammation, University of Münster, Von-Esmarch-Str. 56, 48149 Münster, Germany
| | - Jan Bandemer
- Institute of Cell Biology, Center for Molecular Biology of Inflammation, University of Münster, Von-Esmarch-Str. 56, 48149 Münster, Germany
| | - Thomas Palm
- Institute of Cell Biology, Center for Molecular Biology of Inflammation, University of Münster, Von-Esmarch-Str. 56, 48149 Münster, Germany
| | - Erez Raz
- Institute of Cell Biology, Center for Molecular Biology of Inflammation, University of Münster, Von-Esmarch-Str. 56, 48149 Münster, Germany.
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5
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Wang X, Zhang Y, Zhao Y, Liang Y, Xiang C, Zhou H, Zhang H, Zhang Q, Qing H, Jiang B, Xiong H, Peng L. CD24 promoted cancer cell angiogenesis via Hsp90-mediated STAT3/VEGF signaling pathway in colorectal cancer. Oncotarget 2018; 7:55663-55676. [PMID: 27494878 PMCID: PMC5342444 DOI: 10.18632/oncotarget.10971] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Accepted: 07/16/2016] [Indexed: 01/05/2023] Open
Abstract
CD24 is involved in tumor progression of various cancers, but the effects of CD24 on tumor angiogenesis in colorectal cancer are still unknown. We aimed to investigate the underlying mechanism and role of CD24 on colorectal cancer (CRC) angiogenesis. Our data showed that the microvessal density (MVD) was related to the expression of CD24 in primary and metastasis CRC. Silencing of CD24 could dramatically decrease human umbilical vein endothelial cell (HUVEC) migration, invasion and tubule formation, but trivially affected cell proliferation. We also mechanically showed that silencing CD24 could downregulate the expression of VEGF via inhibiting the phosphorylation and translocation of STAT3. Moreover, Hsp90 was identified as the down-interaction protein of CD24 with co-immunoprecipitation assay and systematic mass spectrometry. Immunofluorescence results showed Hsp90 partly co-localized with CD24 in CRC cell membrane and there was a positive correlation between CD24 and Hsp90 expression in CRC tissues. We gradually evidenced that Hsp90 modulated the stability and degradation of CD24 in a proteasome-depended manner, and transferred the signal transmission from CD24 to STAT3. 17-AAG, a specific Hsp90, could abrogate the CD24 induce- HUVEC migration, invasion and tubule formation in vitro and in vivo. Collectively, our results suggested that CD24 induced CRC angiogenesis in Hsp90-dependent manner and activated STAT3-mediated transcription of VEGF. We provided a new insight into the regulation mechanism of tumor angiogenesis by exploring the role of CD24 in angiogenesis.
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Affiliation(s)
- Xinying Wang
- Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China.,Guangdong Provincial Key Laboratory of Gastroenterology, Guangzhou 510515, China
| | - Yu Zhang
- Department of Gastroenterology, The First People's Hospital of Yunnan Province, Kunming 65003, China
| | - Yingying Zhao
- Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China.,Guangdong Provincial Key Laboratory of Gastroenterology, Guangzhou 510515, China
| | - Yanling Liang
- Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China.,Guangdong Provincial Key Laboratory of Gastroenterology, Guangzhou 510515, China
| | - Cheng Xiang
- Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China.,Guangdong Provincial Key Laboratory of Gastroenterology, Guangzhou 510515, China
| | - Huanyu Zhou
- Department of Ultrasound Imaging, 306 Hospital of PLA, Beijing 100101, China
| | - Hui Zhang
- Institute of Immunology and Molecular Medicine, Jining Medical College, Jining 272067, China.,Department of Medicine, Immunology Institute, Icahn School of Medicine at Mount Sinai, New York 10029, NY, USA
| | - Qiang Zhang
- Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China.,Guangdong Provincial Key Laboratory of Gastroenterology, Guangzhou 510515, China
| | - Haitao Qing
- Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China.,Guangdong Provincial Key Laboratory of Gastroenterology, Guangzhou 510515, China
| | - Bo Jiang
- Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China.,Guangdong Provincial Key Laboratory of Gastroenterology, Guangzhou 510515, China
| | - Huabao Xiong
- Department of Medicine, Immunology Institute, Icahn School of Medicine at Mount Sinai, New York 10029, NY, USA
| | - Liang Peng
- Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China.,Guangdong Provincial Key Laboratory of Gastroenterology, Guangzhou 510515, China.,Department of Medicine, Immunology Institute, Icahn School of Medicine at Mount Sinai, New York 10029, NY, USA
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6
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Elkis Y, Cohen M, Yaffe E, Satmary-Tusk S, Feldman T, Hikri E, Nyska A, Feiglin A, Ofran Y, Shpungin S, Nir U. A novel Fer/FerT targeting compound selectively evokes metabolic stress and necrotic death in malignant cells. Nat Commun 2017; 8:940. [PMID: 29038547 PMCID: PMC5643328 DOI: 10.1038/s41467-017-00832-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: 06/02/2016] [Accepted: 07/28/2017] [Indexed: 12/31/2022] Open
Abstract
Disruption of the reprogrammed energy management system of malignant cells is a prioritized goal of targeted cancer therapy. Two regulators of this system are the Fer kinase, and its cancer cell specific variant, FerT, both residing in subcellular compartments including the mitochondrial electron transport chain. Here, we show that a newly developed inhibitor of Fer and FerT, E260, selectively evokes metabolic stress in cancer cells by imposing mitochondrial dysfunction and deformation, and onset of energy-consuming autophagy which decreases the cellular ATP level. Notably, Fer was also found to associate with PARP-1 and E260 disrupted this association thereby leading to PARP-1 activation. The cooperative intervention with these metabolic pathways leads to energy crisis and necrotic death in malignant, but not in normal human cells, and to the suppression of tumors growth in vivo. Thus, E260 is a new anti-cancer agent which imposes metabolic stress and cellular death in cancer cells. The tyrosine-kinases Fer/FerT associate with the mitochondrial electron transport chain in cancer cells supporting their metabolic reprogramming. Here the authors discover a compound that disrupts Fer /FerT activity and selectively induces cell death of cancer cell lines displaying anti-tumor activity in vivo.
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Affiliation(s)
- Yoav Elkis
- The Mina and Everard Goodman Faculty of Life-Sciences, Bar-Ilan University, Ramat-Gan, 52900, Israel
| | - Moshe Cohen
- The Mina and Everard Goodman Faculty of Life-Sciences, Bar-Ilan University, Ramat-Gan, 52900, Israel
| | - Etai Yaffe
- The Mina and Everard Goodman Faculty of Life-Sciences, Bar-Ilan University, Ramat-Gan, 52900, Israel
| | - Shirly Satmary-Tusk
- The Mina and Everard Goodman Faculty of Life-Sciences, Bar-Ilan University, Ramat-Gan, 52900, Israel
| | - Tal Feldman
- The Mina and Everard Goodman Faculty of Life-Sciences, Bar-Ilan University, Ramat-Gan, 52900, Israel
| | - Elad Hikri
- The Mina and Everard Goodman Faculty of Life-Sciences, Bar-Ilan University, Ramat-Gan, 52900, Israel
| | - Abraham Nyska
- Consultant in Toxicological Pathology, Timrat, and Sackler School of Medicine, Tel Aviv University, Tel Aviv, 36576, Israel
| | - Ariel Feiglin
- The Mina and Everard Goodman Faculty of Life-Sciences, Bar-Ilan University, Ramat-Gan, 52900, Israel
| | - Yanay Ofran
- The Mina and Everard Goodman Faculty of Life-Sciences, Bar-Ilan University, Ramat-Gan, 52900, Israel
| | - Sally Shpungin
- The Mina and Everard Goodman Faculty of Life-Sciences, Bar-Ilan University, Ramat-Gan, 52900, Israel
| | - Uri Nir
- The Mina and Everard Goodman Faculty of Life-Sciences, Bar-Ilan University, Ramat-Gan, 52900, Israel.
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7
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Zahari MS, Wu X, Blair BG, Pinto SM, Nirujogi RS, Jelinek CA, Malhotra R, Kim MS, Park BH, Pandey A. Activating Mutations in PIK3CA Lead to Widespread Modulation of the Tyrosine Phosphoproteome. J Proteome Res 2015; 14:3882-3891. [DOI: 10.1021/acs.jproteome.5b00302] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Muhammad Saddiq Zahari
- McKusick-Nathans
Institute of Genetic Medicine and Department of Biological Chemistry, Johns Hopkins University School of Medicine, 733 North Broadway Street, Baltimore, Maryland 21205, United States
| | - Xinyan Wu
- McKusick-Nathans
Institute of Genetic Medicine and Department of Biological Chemistry, Johns Hopkins University School of Medicine, 733 North Broadway Street, Baltimore, Maryland 21205, United States
| | - Brian G. Blair
- The
Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins University School of Medicine, 401 North Broadway Street, Baltimore, Maryland 21231, United States
| | - Sneha M. Pinto
- Institute of Bioinformatics, International
Tech Park, Bangalore, 560066 India
| | - Raja S. Nirujogi
- Institute of Bioinformatics, International
Tech Park, Bangalore, 560066 India
| | - Christine A. Jelinek
- McKusick-Nathans
Institute of Genetic Medicine and Department of Biological Chemistry, Johns Hopkins University School of Medicine, 733 North Broadway Street, Baltimore, Maryland 21205, United States
| | - Radhika Malhotra
- College
of Arts and Sciences, University of Delaware, 4 Kent Way, Newark, Delaware 19716, United States
| | - Min-Sik Kim
- McKusick-Nathans
Institute of Genetic Medicine and Department of Biological Chemistry, Johns Hopkins University School of Medicine, 733 North Broadway Street, Baltimore, Maryland 21205, United States
| | - Ben Ho Park
- The
Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins University School of Medicine, 401 North Broadway Street, Baltimore, Maryland 21231, United States
| | - Akhilesh Pandey
- McKusick-Nathans
Institute of Genetic Medicine and Department of Biological Chemistry, Johns Hopkins University School of Medicine, 733 North Broadway Street, Baltimore, Maryland 21205, United States
- Departments
of Oncology and Pathology, Johns Hopkins University School of Medicine, 401 North Broadway Street, Baltimore, Maryland 21231, United States
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8
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Yaffe E, Hikri E, Elkis Y, Cohen O, Segal A, Makovski A, Varvak A, Shpungin S, Nir U. Oncogenic properties of a spermatogenic meiotic variant of fer kinase expressed in somatic cells. Cancer Res 2014; 74:6474-85. [PMID: 25237066 DOI: 10.1158/0008-5472.can-14-0058] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The kinase Fer and its spermatogenic meiotic variant, FerT, are coexpressed in normal testes and cancerous tumors, but whether they exert related roles in spermatogenic or malignant cells has not been known. Here, we show that Fer and FerT reside in the mitochondria of spermatogenic cells and are harnessed to the reprogrammed mitochondria of colon carcinoma cells. Both kinases bound complex I of the mitochondrial electron transport chain (ETC) in spermatogenic and in colon carcinoma cells, and silencing of either Fer or FerT was sufficient to impair the activity of this complex. Directed mitochondrial accumulation of FerT in nonmalignant NIH3T3 cells increased their ETC complex I activity, ATP production, and survival, contingent upon stress conditions caused by nutrient and oxygen deprivation. Strikingly, directed mitochondrial accumulation of FerT endowed nonmalignant cells with tumor-forming ability. Thus, recruitment of a meiotic mitochondrial component to cancer cell mitochondria highlights a pivotal role for reprogrammed mitochondria in tumorigenesis.
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Affiliation(s)
- Etai Yaffe
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, Israel
| | - Elad Hikri
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, Israel
| | - Yoav Elkis
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, Israel
| | - Ortal Cohen
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, Israel
| | - Ariela Segal
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, Israel
| | - Adar Makovski
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, Israel
| | - Alexander Varvak
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, Israel
| | - Sally Shpungin
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, Israel
| | - Uri Nir
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, Israel.
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9
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Makovski A, Yaffe E, Shpungin S, Nir U. Intronic promoter drives the BORIS-regulated expression of FerT in colon carcinoma cells. J Biol Chem 2012; 287:6100-12. [PMID: 22223638 DOI: 10.1074/jbc.m111.327106] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Fer is an intracellular tyrosine kinase that accumulates in most mammalian tissues. A truncated variant of Fer, FerT, is uniquely detected in spermatogenic cells and is absent from normal somatic tissues. Here, we show that in addition to Fer, FerT also accumulates in CC cells and in metastases derived from colorectal tumors, but not in normal human cells. Thus, FerT is a new member of the CTA protein family. Transcription of the ferT gene in CC cells was found to be driven by an intronic promoter residing in intron 10 of the fer gene and to be regulated by another CTA, the Brother of the Regulator of Imprinted Sites (BORIS) transcription factor. BORIS binds to the ferT promoter and down-regulation of BORIS significantly decreases the expression of ferT in CC cells. Accumulation of the ferT RNA was also regulated by the DNA methylation status and paralleled the expression profile of the boris transcript. Accordingly, the intronic ferT promoter was found to be hypomethylated in cancer cells expressing the FerT protein, by comparison with non-expressers. Collectively, we show here that FerT is a new CTA whose accumulation in CC cells, commonly considered low CTA expressers, is controlled by a novel transcription regulatory mechanism.
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Affiliation(s)
- Adar Makovski
- Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat Gan 52900, Israel
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10
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Laederich MB, Degnin CR, Lunstrum GP, Holden P, Horton WA. Fibroblast growth factor receptor 3 (FGFR3) is a strong heat shock protein 90 (Hsp90) client: implications for therapeutic manipulation. J Biol Chem 2011; 286:19597-604. [PMID: 21487019 DOI: 10.1074/jbc.m110.206151] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Fibroblast growth factor receptor 3 (FGFR3) is a key regulator of growth and differentiation, whose aberrant activation causes a number of genetic diseases including achondroplasia and cancer. Hsp90 is a specialized molecular chaperone involved in stabilizing a select set of proteins termed clients. Here, we delineate the relationship of Hsp90 and co-chaperone Cdc37 with FGFR3 and the FGFR family. FGFR3 strongly associates with these chaperone complexes and depends on them for stability and function. Inhibition of Hsp90 function using the geldanamycin analog 17-AAG induces the ubiquitination and degradation of FGFR3 and reduces the signaling capacity of FGFR3. Other FGFRs weakly interact with these chaperones and are differentially influenced by Hsp90 inhibition. The Hsp90-related ubiquitin ligase CHIP is able to interact and destabilize FGFR3. Our results establish FGFR3 as a strong Hsp90 client and suggest that modulating Hsp90 chaperone complexes may beneficially influence the stability and function of FGFR3 in disease.
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Affiliation(s)
- Melanie B Laederich
- Research Center, Shriners Hospital for Children, Department of Cell & Developmental Biology, Oregon Health & Science University, Portland, Oregon 97239, USA
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11
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Abstract
Heat shock protein 90 (HSP90) is a highly conserved molecular chaperone that facilitates the maturation of a wide range of proteins (known as clients). Clients are enriched in signal transducers, including kinases and transcription factors. Therefore, HSP90 regulates diverse cellular functions and exerts marked effects on normal biology, disease and evolutionary processes. Recent structural and functional analyses have provided new insights on the transcriptional and biochemical regulation of HSP90 and the structural dynamics it uses to act on a diverse client repertoire. Comprehensive understanding of how HSP90 functions promises not only to provide new avenues for therapeutic intervention, but to shed light on fundamental biological questions.
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