151
|
Agoni C, Ramharack P, Soliman MES. Allosteric inhibition induces an open WPD-loop: a new avenue towards glioblastoma therapy. RSC Adv 2018; 8:40187-40197. [PMID: 35558220 PMCID: PMC9091281 DOI: 10.1039/c8ra08427k] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Accepted: 11/25/2018] [Indexed: 01/06/2023] Open
Abstract
Structural mechanism of inhibition of NAZ2329 at the allosteric site of PTPRZ, with particular emphasis on the dynamics of the WPD-loop.
Collapse
Affiliation(s)
- Clement Agoni
- Molecular Bio-computation and Drug Design Laboratory
- School of Health Sciences
- University of KwaZulu-Natal
- Durban 4001
- South Africa
| | - Pritika Ramharack
- Molecular Bio-computation and Drug Design Laboratory
- School of Health Sciences
- University of KwaZulu-Natal
- Durban 4001
- South Africa
| | - Mahmoud E. S. Soliman
- Molecular Bio-computation and Drug Design Laboratory
- School of Health Sciences
- University of KwaZulu-Natal
- Durban 4001
- South Africa
| |
Collapse
|
152
|
Structure and Molecular Dynamics Simulations of Protein Tyrosine Phosphatase Non-Receptor 12 Provide Insights into the Catalytic Mechanism of the Enzyme. Int J Mol Sci 2017; 19:ijms19010060. [PMID: 29278368 PMCID: PMC5796010 DOI: 10.3390/ijms19010060] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 12/21/2017] [Accepted: 12/23/2017] [Indexed: 01/19/2023] Open
Abstract
Protein tyrosine phosphatase non-receptor 12 (PTPN12) is an important protein tyrosine phosphatase involved in regulating cell adhesion and migration as well as tumorigenesis. Here, we solved a crystal structure of the native PTPN12 catalytic domain with the catalytic cysteine (residue 231) in dual conformation (phosphorylated and unphosphorylated). Combined with molecular dynamics simulation data, we concluded that those two conformations represent different states of the protein which are realized during the dephosphorylation reaction. Together with docking and mutagenesis data, our results provide a molecular basis for understanding the catalytic mechanism of PTPN12 and its role in tumorigenesis.
Collapse
|
153
|
Hepatic protein tyrosine phosphatase receptor gamma links obesity-induced inflammation to insulin resistance. Nat Commun 2017; 8:1820. [PMID: 29180649 PMCID: PMC5703876 DOI: 10.1038/s41467-017-02074-2] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2017] [Accepted: 11/03/2017] [Indexed: 12/31/2022] Open
Abstract
Obesity-induced inflammation engenders insulin resistance and type 2 diabetes mellitus (T2DM) but the inflammatory effectors linking obesity to insulin resistance are incompletely understood. Here, we show that hepatic expression of Protein Tyrosine Phosphatase Receptor Gamma (PTPR-γ) is stimulated by inflammation in obese/T2DM mice and positively correlates with indices of inflammation and insulin resistance in humans. NF-κB binds to the promoter of Ptprg and is required for inflammation-induced PTPR-γ expression. PTPR-γ loss-of-function lowers glycemia and insulinemia by enhancing insulin-stimulated suppression of endogenous glucose production. These phenotypes are rescued by re-expression of Ptprg only in liver of mice lacking Ptprg globally. Hepatic PTPR-γ overexpression that mimics levels found in obesity is sufficient to cause severe hepatic and systemic insulin resistance. We propose hepatic PTPR-γ as a link between obesity-induced inflammation and insulin resistance and as potential target for treatment of T2DM. During obesity, chronic inflammation leads to insulin resistance and diabetes. Here, Brenachot et al. show that Protein Tyrosine Phosphatase Receptor Gamma is upregulated in obesity by inflammatory signals and correlates with insulin resistance in humans. Its deletion in mouse models of obesity and inflammation ameliorates insulin resistance by suppressing glucose production.
Collapse
|
154
|
Pastor M, Fernández-Calle R, Di Geronimo B, Vicente-Rodríguez M, Zapico JM, Gramage E, Coderch C, Pérez-García C, Lasek AW, Puchades-Carrasco L, Pineda-Lucena A, de Pascual-Teresa B, Herradón G, Ramos A. Development of inhibitors of receptor protein tyrosine phosphatase β/ζ (PTPRZ1) as candidates for CNS disorders. Eur J Med Chem 2017; 144:318-329. [PMID: 29275231 DOI: 10.1016/j.ejmech.2017.11.080] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Revised: 11/10/2017] [Accepted: 11/27/2017] [Indexed: 02/04/2023]
Abstract
A new series of blood-brain barrier permeable molecules designed to mimic the activity of Pleiotrophin in the CNS has been designed and synthesized. These compounds exert their action by interacting with the intracellular domain PD1 of the Protein Tyrosine-Phosphatase Receptor Z1 (PTPRZ1), and inhibiting its tyrosine phosphatase activity. The most potent compounds 10a and 12b (IC50 = 0,1 μM) significantly increase the phosphorylation of key tyrosine residues of PTPRZ1 substrates involved in neuronal survival and differentiation, and display protective effects against amphetamine-induced toxicity. Docking and molecular dynamics experiments have been used to analyze the binding mode and to explain the observed selectivity against PTP1B. An In vivo experiment has demonstrated that 10a can cross the BBB, thus promoting the possibility of moving forward these candidates for the development of drugs for the treatment of CNS disorders, such as drug addiction and neurodegenerative diseases.
Collapse
Affiliation(s)
- Miryam Pastor
- Departamento de Química y Bioquímica, Facultad de Farmacia, Universidad San Pablo-CEU, CEU Universities, Urbanización Montepríncipe, 28925, Alcorcón, Madrid, Spain
| | - Rosalía Fernández-Calle
- Departamento de Ciencias Farmacéuticas y de la Salud, Facultad de Farmacia, Universidad San Pablo-CEU, CEU Universities, Urbanización Montepríncipe, 28925, Alcorcón, Madrid, Spain
| | - Bruno Di Geronimo
- Departamento de Química y Bioquímica, Facultad de Farmacia, Universidad San Pablo-CEU, CEU Universities, Urbanización Montepríncipe, 28925, Alcorcón, Madrid, Spain
| | - Marta Vicente-Rodríguez
- Departamento de Ciencias Farmacéuticas y de la Salud, Facultad de Farmacia, Universidad San Pablo-CEU, CEU Universities, Urbanización Montepríncipe, 28925, Alcorcón, Madrid, Spain
| | - José María Zapico
- Departamento de Química y Bioquímica, Facultad de Farmacia, Universidad San Pablo-CEU, CEU Universities, Urbanización Montepríncipe, 28925, Alcorcón, Madrid, Spain
| | - Esther Gramage
- Departamento de Ciencias Farmacéuticas y de la Salud, Facultad de Farmacia, Universidad San Pablo-CEU, CEU Universities, Urbanización Montepríncipe, 28925, Alcorcón, Madrid, Spain
| | - Claire Coderch
- Departamento de Química y Bioquímica, Facultad de Farmacia, Universidad San Pablo-CEU, CEU Universities, Urbanización Montepríncipe, 28925, Alcorcón, Madrid, Spain
| | - Carmen Pérez-García
- Departamento de Ciencias Farmacéuticas y de la Salud, Facultad de Farmacia, Universidad San Pablo-CEU, CEU Universities, Urbanización Montepríncipe, 28925, Alcorcón, Madrid, Spain
| | - Amy W Lasek
- Department of Psychiatry, University of Illinois at Chicago, 1601 West Taylor Street, Chicago, IL 60612, USA
| | - Leonor Puchades-Carrasco
- Unidad Mixta en Metabolómica Clínica Instituto de Investigación Sanitaria La Fe - Centro de Investigación Príncipe Felipe, Hospital Universitario y Politécnico La Fe, Avenida Fernando Abril Martorell, 106, Torre A, 6-17, 46026 Valencia, Spain
| | - Antonio Pineda-Lucena
- Unidad Mixta en Metabolómica Clínica Instituto de Investigación Sanitaria La Fe - Centro de Investigación Príncipe Felipe, Hospital Universitario y Politécnico La Fe, Avenida Fernando Abril Martorell, 106, Torre A, 6-17, 46026 Valencia, Spain
| | - Beatriz de Pascual-Teresa
- Departamento de Química y Bioquímica, Facultad de Farmacia, Universidad San Pablo-CEU, CEU Universities, Urbanización Montepríncipe, 28925, Alcorcón, Madrid, Spain.
| | - Gonzalo Herradón
- Departamento de Ciencias Farmacéuticas y de la Salud, Facultad de Farmacia, Universidad San Pablo-CEU, CEU Universities, Urbanización Montepríncipe, 28925, Alcorcón, Madrid, Spain.
| | - Ana Ramos
- Departamento de Química y Bioquímica, Facultad de Farmacia, Universidad San Pablo-CEU, CEU Universities, Urbanización Montepríncipe, 28925, Alcorcón, Madrid, Spain.
| |
Collapse
|
155
|
Fujikawa A, Chow JPH, Matsumoto M, Suzuki R, Kuboyama K, Yamamoto N, Noda M. Identification of novel splicing variants of protein tyrosine phosphatase receptor type Z. J Biochem 2017; 162:381-390. [PMID: 28992190 DOI: 10.1093/jb/mvx042] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Accepted: 06/14/2017] [Indexed: 11/13/2022] Open
Abstract
Protein tyrosine phosphatase receptor type Z (PTPRZ, also known as PTPζ or RPTPβ) is preferentially expressed in the central nervous system (CNS). PTPRZ plays important roles during development and adulthood in CNS myelination, learning and memory. Three splicing isoforms for PTPRZ have been identified to date: two receptor type isoforms, PTPRZ-A and PTPRZ-B, and one secretory isoform, PTPRZ-S. We herein identified novel PTPRZ receptor sub-isoforms without a seven-amino acid sequence encoded by exon 16. This sequence forms a part of the helix-turn-helix segment called the 'wedge' structure, which is located at the N-terminal region in the membrane-proximal protein tyrosine phosphatase domain. In contrast to conventional receptor isoforms with uniform expression, the deleted isoforms were expressed in the brain, but not in the retina, indicating the tissue-specific splicing of exon 16. Biochemical analyses of PTPRZ intracellular regions revealed differences in the characteristics of the deleted form, namely, stronger binding activity to postsynaptic density protein 95 (PSD95) and greater enrichment in the postsynaptic density fraction than the full-length form. Furthermore, the exon 16-deleted form exhibited higher catalytic efficiency in vitro. These results suggest that sub-isoforms of PTPRZ have different functions because of variations in the wedge structure.
Collapse
Affiliation(s)
- Akihiro Fujikawa
- Division of Molecular Neurobiology, National Institute for Basic Biology
| | - Jeremy Pak Hong Chow
- Division of Molecular Neurobiology, National Institute for Basic Biology.,School of Life Science, Graduate University for Advanced Studies, 5-1 Higashiyama, Myodaiji-cho, Okazaki, Aichi 444-8787, Japan
| | - Masahito Matsumoto
- Division of Molecular Neurobiology, National Institute for Basic Biology
| | - Ryoko Suzuki
- Division of Molecular Neurobiology, National Institute for Basic Biology
| | - Kazuya Kuboyama
- Division of Molecular Neurobiology, National Institute for Basic Biology
| | - Naoki Yamamoto
- Laboratory of Molecular Biology & Histochemistry, Fujita Health University, 1-98, Toyoake, Aichi 470-1192, Japan
| | - Masaharu Noda
- Division of Molecular Neurobiology, National Institute for Basic Biology.,School of Life Science, Graduate University for Advanced Studies, 5-1 Higashiyama, Myodaiji-cho, Okazaki, Aichi 444-8787, Japan
| |
Collapse
|
156
|
Witten MR, Wissler L, Snow M, Geschwindner S, Read JA, Brandon NJ, Nairn AC, Lombroso PJ, Käck H, Ellman JA. X-ray Characterization and Structure-Based Optimization of Striatal-Enriched Protein Tyrosine Phosphatase Inhibitors. J Med Chem 2017; 60:9299-9319. [PMID: 29116812 DOI: 10.1021/acs.jmedchem.7b01292] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Excessive activity of striatal-enriched protein tyrosine phosphatase (STEP) in the brain has been detected in numerous neuropsychiatric disorders including Alzheimer's disease. Notably, knockdown of STEP in an Alzheimer mouse model effected an increase in the phosphorylation levels of downstream STEP substrates and a significant reversal in the observed cognitive and memory deficits. These data point to the promising potential of STEP as a target for drug discovery in Alzheimer's treatment. We previously reported a substrate-based approach to the development of low molecular weight STEP inhibitors with Ki values as low as 7.8 μM. Herein, we disclose the first X-ray crystal structures of inhibitors bound to STEP and the surprising finding that they occupy noncoincident binding sites. Moreover, we utilize this structural information to optimize the inhibitor structure to achieve a Ki of 110 nM, with 15-60-fold selectivity across a series of phosphatases.
Collapse
Affiliation(s)
- Michael R Witten
- Department of Chemistry, Yale University , New Haven, Connecticut 06520, United States
| | - Lisa Wissler
- Discovery Sciences, Innovative Medicines and Early Development Biotech Unit, AstraZeneca , Gothenburg, Sweden
| | - Melanie Snow
- Discovery Sciences, Innovative Medicines and Early Development Biotech Unit, AstraZeneca , Macclesfield SK10 4TG, United Kingdom
| | - Stefan Geschwindner
- Discovery Sciences, Innovative Medicines and Early Development Biotech Unit, AstraZeneca , Gothenburg, Sweden
| | - Jon A Read
- Discovery Sciences, Innovative Medicines and Early Development Biotech Unit, AstraZeneca , Cambridge CB4 0WG, United Kingdom
| | - Nicholas J Brandon
- Neuroscience, Innovative Medicines and Early Development Biotech Unit, AstraZeneca , Cambridge, Massachusetts 02139, United States
| | - Angus C Nairn
- Department of Psychiatry, Yale University , New Haven, Connecticut 06520, United States
| | - Paul J Lombroso
- Department of Psychiatry, Yale University , New Haven, Connecticut 06520, United States.,Child Study Center, Yale University , New Haven, Connecticut 06520, United States
| | - Helena Käck
- Discovery Sciences, Innovative Medicines and Early Development Biotech Unit, AstraZeneca , Gothenburg, Sweden
| | - Jonathan A Ellman
- Department of Chemistry, Yale University , New Haven, Connecticut 06520, United States
| |
Collapse
|
157
|
Lu C, Liu X, Zhang CS, Gong H, Wu JW, Wang ZX. Structural and Dynamic Insights into the Mechanism of Allosteric Signal Transmission in ERK2-Mediated MKP3 Activation. Biochemistry 2017; 56:6165-6175. [PMID: 29077400 DOI: 10.1021/acs.biochem.7b00827] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The mitogen-activated protein kinases (MAPKs) are key components of cellular signal transduction pathways, which are down-regulated by the MAPK phosphatases (MKPs). Catalytic activity of the MKPs is controlled both by their ability to recognize selective MAPKs and by allosteric activation upon binding to MAPK substrates. Here, we use a combination of experimental and computational techniques to elucidate the molecular mechanism for the ERK2-induced MKP3 activation. Mutational and kinetic study shows that the 334FNFM337 motif in the MKP3 catalytic domain is essential for MKP3-mediated ERK2 inactivation and is responsible for ERK2-mediated MKP3 activation. The long-term molecular dynamics (MD) simulations further reveal a complete dynamic process in which the catalytic domain of MKP3 gradually changes to a conformation that resembles an active MKP catalytic domain over the time scale of the simulation, providing a direct time-dependent observation of allosteric signal transmission in ERK2-induced MKP3 activation.
Collapse
Affiliation(s)
- Chang Lu
- Key Laboratory of Ministry of Education for Protein Science, School of Life Sciences, Tsinghua University , Beijing 100084, PR China
| | - Xin Liu
- Key Laboratory of Ministry of Education for Protein Science, School of Life Sciences, Tsinghua University , Beijing 100084, PR China
| | - Chen-Song Zhang
- State Key Laboratory of Stress Cell Biology, School of Life Sciences, Xiamen University , Xiamen, Fujian 361005, PR China
| | - Haipeng Gong
- Key Laboratory of Ministry of Education for Protein Science, School of Life Sciences, Tsinghua University , Beijing 100084, PR China
| | - Jia-Wei Wu
- Key Laboratory of Ministry of Education for Protein Science, School of Life Sciences, Tsinghua University , Beijing 100084, PR China
| | - Zhi-Xin Wang
- Key Laboratory of Ministry of Education for Protein Science, School of Life Sciences, Tsinghua University , Beijing 100084, PR China
| |
Collapse
|
158
|
Wei CH, Min HG, Kim M, Kim GH, Chun HJ, Ryu SE. Two intermediate states of the conformational switch in dual specificity phosphatase 13a. Pharmacol Res 2017; 128:211-219. [PMID: 29106959 DOI: 10.1016/j.phrs.2017.10.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Revised: 10/16/2017] [Accepted: 10/16/2017] [Indexed: 10/18/2022]
Abstract
Dual specificity phosphatases (DUSPs) include MAP kinase phosphatases and atypical dual specificity phosphatases and mediate cell growth and differentiation, brain function, and immune responses. They serve as targets for drug development against cancers, diabetes and depression. Several DUSPs have non-canonical conformation of the central β-sheet and active site loops, suggesting that they may have conformational switch that is related to the regulation of enzyme activity. Here, we determined the crystal structure of DUSP13a, and identified two different structures that represent intermediates of the postulated conformational switch. Amino acid sequence of DUSP13a is not significantly homologous to DUSPs with conformational switch, indicating that the conformational switch is not sequence-dependent, but rather determined by ligand interaction. The sequence-independency suggests that other DUSPs with canonical conformation may have the conformational switch during specific cellular regulation. The conformational switch leads to significant changes in the protein surface, including a hydrophobic surface and pockets, which can be exploited for development of allosteric modulators of drug target DUSPs.
Collapse
Affiliation(s)
- Chun Hwa Wei
- Department of Bioengineering, College of Engineering, Hanyang University, Seoul, Korea
| | - Hee Gyeong Min
- Department of Bioengineering, College of Engineering, Hanyang University, Seoul, Korea
| | - Myeongbin Kim
- Department of Bioengineering, College of Engineering, Hanyang University, Seoul, Korea
| | - Gwan Hee Kim
- Department of Bioengineering, College of Engineering, Hanyang University, Seoul, Korea
| | - Ha-Jung Chun
- Department of Radiation onclogy, College of Medicine, Hanyang University, Seoul, Korea
| | - Seong Eon Ryu
- Department of Bioengineering, College of Engineering, Hanyang University, Seoul, Korea.
| |
Collapse
|
159
|
Cui N, Lu H, Li M, Yan Q. PTPN21 protects PC12 cell against oxygen-glucose deprivation by activating cdk5 through ERK1/2 signaling pathway. Eur J Pharmacol 2017; 814:226-231. [DOI: 10.1016/j.ejphar.2017.08.021] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Revised: 08/15/2017] [Accepted: 08/15/2017] [Indexed: 12/29/2022]
|
160
|
Zhang S, Fan G, Hao Y, Hammell M, Wilkinson JE, Tonks NK. Suppression of protein tyrosine phosphatase N23 predisposes to breast tumorigenesis via activation of FYN kinase. Genes Dev 2017; 31:1939-1957. [PMID: 29066500 PMCID: PMC5710140 DOI: 10.1101/gad.304261.117] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Accepted: 10/06/2017] [Indexed: 12/18/2022]
Abstract
Zhang et al. identified PTPN23 as a suppressor of cell motility and invasion in mammary epithelial and breast cancer cells. They validated the underlying mechanism of PTPN23 function in breast tumorigenesis as that of a key phosphatase that normally suppresses the activity of FYN in two different models. Disruption of the balanced modulation of reversible tyrosine phosphorylation has been implicated in the etiology of various human cancers, including breast cancer. Protein Tyrosine Phosphatase N23 (PTPN23) resides in chromosomal region 3p21.3, which is hemizygously or homozygously lost in some breast cancer patients. In a loss-of-function PTPome screen, our laboratory identified PTPN23 as a suppressor of cell motility and invasion in mammary epithelial and breast cancer cells. Now, our TCGA (The Cancer Genome Atlas) database analyses illustrate a correlation between low PTPN23 expression and poor survival in breast cancers of various subtypes. Therefore, we investigated the tumor-suppressive function of PTPN23 in an orthotopic transplantation mouse model. Suppression of PTPN23 in Comma 1Dβ cells induced breast tumors within 56 wk. In PTPN23-depleted tumors, we detected hyperphosphorylation of the autophosphorylation site tyrosine in the SRC family kinase (SFK) FYN as well as Tyr142 in β-catenin. We validated the underlying mechanism of PTPN23 function in breast tumorigenesis as that of a key phosphatase that normally suppresses the activity of FYN in two different models. We demonstrated that tumor outgrowth from PTPN23-deficient BT474 cells was suppressed in a xenograft model in vivo upon treatment with AZD0530, an SFK inhibitor. Furthermore, double knockout of FYN and PTPN23 via CRISPR/CAS9 also attenuated tumor outgrowth from PTPN23 knockout Cal51 cells. Overall, this mechanistic analysis of the tumor-suppressive function of PTPN23 in breast cancer supports the identification of FYN as a therapeutic target for breast tumors with heterozygous or homozygous loss of PTPN23.
Collapse
Affiliation(s)
- Siwei Zhang
- Cold Spring Harbor Laboratory, Cold Spring Harbor, New York 11724, USA.,Department of Molecular Genetics and Microbiology, Stony Brook University, Stony Brook, New York 11794, USA
| | - Gaofeng Fan
- Cold Spring Harbor Laboratory, Cold Spring Harbor, New York 11724, USA.,School of Life Science and Technology, ShanghaiTech University, Shanghai, 201210, China
| | - Yuan Hao
- Cold Spring Harbor Laboratory, Cold Spring Harbor, New York 11724, USA
| | - Molly Hammell
- Cold Spring Harbor Laboratory, Cold Spring Harbor, New York 11724, USA
| | - John Erby Wilkinson
- Unit for Laboratory Animal Medicine, Department of Pathology, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - Nicholas K Tonks
- Cold Spring Harbor Laboratory, Cold Spring Harbor, New York 11724, USA
| |
Collapse
|
161
|
Mi W, Guan H, Lyu J, Zhao D, Xi Y, Jiang S, Andrews FH, Wang X, Gagea M, Wen H, Tora L, Dent SYR, Kutateladze TG, Li W, Li H, Shi X. YEATS2 links histone acetylation to tumorigenesis of non-small cell lung cancer. Nat Commun 2017; 8:1088. [PMID: 29057918 PMCID: PMC5651844 DOI: 10.1038/s41467-017-01173-4] [Citation(s) in RCA: 87] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Accepted: 08/24/2017] [Indexed: 12/17/2022] Open
Abstract
Recognition of modified histones by “reader” proteins constitutes a key mechanism regulating diverse chromatin-associated processes important for normal and neoplastic development. We recently identified the YEATS domain as a novel acetyllysine-binding module; however, the functional importance of YEATS domain-containing proteins in human cancer remains largely unknown. Here, we show that the YEATS2 gene is highly amplified in human non-small cell lung cancer (NSCLC) and is required for cancer cell growth and survival. YEATS2 binds to acetylated histone H3 via its YEATS domain. The YEATS2-containing ATAC complex co-localizes with H3K27 acetylation (H3K27ac) on the promoters of actively transcribed genes. Depletion of YEATS2 or disruption of the interaction between its YEATS domain and acetylated histones reduces the ATAC complex-dependent promoter H3K9ac levels and deactivates the expression of essential genes. Taken together, our study identifies YEATS2 as a histone H3K27ac reader that regulates a transcriptional program essential for NSCLC tumorigenesis. Histone modification recognition is an important mechanism for gene expression regulation in cancer. Here, the authors identify YEATS2 as a histone H3K27ac reader, regulating a transcriptional program essential for tumorigenesis in human non-small cell lung cancer.
Collapse
Affiliation(s)
- Wenyi Mi
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas M.D. Anderson Cancer Center, Houston, TX, 77030, USA.,Center for Cancer Epigenetics, The University of Texas M.D. Anderson Cancer Center, Houston, TX, 77030, USA
| | - Haipeng Guan
- MOE Key Laboratory of Protein Sciences, Beijing Advanced Innovation Center for Structural Biology, Department of Basic Medical Sciences, School of Medicine, Tsinghua University, Beijing, 100084, China.,Tsinghua-Peking Joint Center for Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Jie Lyu
- Department of Molecular and Cellular Biology, Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Dan Zhao
- MOE Key Laboratory of Protein Sciences, Beijing Advanced Innovation Center for Structural Biology, Department of Basic Medical Sciences, School of Medicine, Tsinghua University, Beijing, 100084, China.,Tsinghua-Peking Joint Center for Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Yuanxin Xi
- Department of Molecular and Cellular Biology, Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Shiming Jiang
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas M.D. Anderson Cancer Center, Houston, TX, 77030, USA.,Center for Cancer Epigenetics, The University of Texas M.D. Anderson Cancer Center, Houston, TX, 77030, USA
| | - Forest H Andrews
- Department of Pharmacology, University of Colorado School of Medicine, Aurora, CO, 80045, USA
| | - Xiaolu Wang
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas M.D. Anderson Cancer Center, Houston, TX, 77030, USA.,Center for Cancer Epigenetics, The University of Texas M.D. Anderson Cancer Center, Houston, TX, 77030, USA
| | - Mihai Gagea
- Department of Veterinary Medicine & Surgery, The University of Texas M.D. Anderson Cancer Center, Houston, TX, 77030, USA
| | - Hong Wen
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas M.D. Anderson Cancer Center, Houston, TX, 77030, USA.,Center for Cancer Epigenetics, The University of Texas M.D. Anderson Cancer Center, Houston, TX, 77030, USA
| | - Laszlo Tora
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, 67404, Illkirch, France.,Centre National de la Recherche Scientifique, UMR7104, 67404, Illkirch, France.,Institut National de la Santé et de la Recherche Médicale, U964, 67404, Illkirch, France.,Université de Strasbourg, 67404, Illkirch, France
| | - Sharon Y R Dent
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas M.D. Anderson Cancer Center, Houston, TX, 77030, USA.,Center for Cancer Epigenetics, The University of Texas M.D. Anderson Cancer Center, Houston, TX, 77030, USA.,Genes and Development and Epigenetics & Molecular Carcinogenesis Graduate Programs, The University of Texas Graduate School of Biomedical Sciences, Houston, TX, 77030, USA
| | - Tatiana G Kutateladze
- Department of Pharmacology, University of Colorado School of Medicine, Aurora, CO, 80045, USA
| | - Wei Li
- Department of Molecular and Cellular Biology, Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX, 77030, USA.
| | - Haitao Li
- MOE Key Laboratory of Protein Sciences, Beijing Advanced Innovation Center for Structural Biology, Department of Basic Medical Sciences, School of Medicine, Tsinghua University, Beijing, 100084, China. .,Tsinghua-Peking Joint Center for Life Sciences, Tsinghua University, Beijing, 100084, China.
| | - Xiaobing Shi
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas M.D. Anderson Cancer Center, Houston, TX, 77030, USA. .,Center for Cancer Epigenetics, The University of Texas M.D. Anderson Cancer Center, Houston, TX, 77030, USA. .,Genes and Development and Epigenetics & Molecular Carcinogenesis Graduate Programs, The University of Texas Graduate School of Biomedical Sciences, Houston, TX, 77030, USA.
| |
Collapse
|
162
|
Soady KJ, Tornillo G, Kendrick H, Meniel V, Olijnyk-Dallis D, Morris JS, Stein T, Gusterson BA, Isacke CM, Smalley MJ. The receptor protein tyrosine phosphatase PTPRB negatively regulates FGF2-dependent branching morphogenesis. Development 2017; 144:3777-3788. [PMID: 28870991 PMCID: PMC6126639 DOI: 10.1242/dev.149120] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Accepted: 08/25/2017] [Indexed: 02/02/2023]
Abstract
PTPRB is a transmembrane protein tyrosine phosphatase known to regulate blood vessel remodelling and angiogenesis. Here, we demonstrate that PTPRB negatively regulates branching morphogenesis in the mouse mammary epithelium. We show that Ptprb is highly expressed in adult mammary stem cells and also, although at lower levels, in oestrogen receptor-positive luminal cells. During mammary development, Ptprb expression is downregulated during puberty, a period of extensive ductal outgrowth and branching. In vivo shRNA knockdown of Ptprb in the cleared mammary fat pad transplant assay resulted in smaller epithelial outgrowths with an increased branching density and also increased branching in an in vitro organoid assay. Organoid branching was dependent on stimulation by FGF2, and Ptprb knockdown in mammary epithelial cells resulted in a higher level of fibroblast growth factor receptor (FGFR) activation and ERK1/2 phosphorylation, both at baseline and following FGF2 stimulation. Therefore, PTPRB regulates branching morphogenesis in the mammary epithelium by modulating the response of the FGFR signalling pathway to FGF stimulation. Considering the importance of branching morphogenesis in multiple taxa, our findings have general importance outside mammary developmental biology.
Collapse
Affiliation(s)
- Kelly J Soady
- Division of Breast Cancer Research, Breast Cancer Now Research Centre, The Institute of Cancer Research, 237 Fulham Road, London SW3 6JB, UK
| | - Giusy Tornillo
- European Cancer Stem Cell Research Institute and Cardiff School of Biosciences, Cardiff University, Hadyn Ellis Building, Maindy Road, Cardiff, CF24 4HQ, UK
| | - Howard Kendrick
- European Cancer Stem Cell Research Institute and Cardiff School of Biosciences, Cardiff University, Hadyn Ellis Building, Maindy Road, Cardiff, CF24 4HQ, UK
| | - Valerie Meniel
- European Cancer Stem Cell Research Institute and Cardiff School of Biosciences, Cardiff University, Hadyn Ellis Building, Maindy Road, Cardiff, CF24 4HQ, UK
| | - Daria Olijnyk-Dallis
- Institute of Cancer Sciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Joanna S Morris
- School of Veterinary Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Bearsden Road, Glasgow, G61 1QH, UK
| | - Torsten Stein
- Institute of Cancer Sciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Barry A Gusterson
- Institute of Cancer Sciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Clare M Isacke
- Division of Breast Cancer Research, Breast Cancer Now Research Centre, The Institute of Cancer Research, 237 Fulham Road, London SW3 6JB, UK
| | - Matthew J Smalley
- European Cancer Stem Cell Research Institute and Cardiff School of Biosciences, Cardiff University, Hadyn Ellis Building, Maindy Road, Cardiff, CF24 4HQ, UK
| |
Collapse
|
163
|
Chan WC, Knowlton GS, Bishop AC. Activation of Engineered Protein Tyrosine Phosphatases with the Biarsenical Compound AsCy3-EDT 2. Chembiochem 2017; 18:1950-1958. [PMID: 28745017 PMCID: PMC5923034 DOI: 10.1002/cbic.201700253] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Indexed: 12/22/2022]
Abstract
Methods for activating signaling enzymes hold significant potential for the study of cellular signal transduction. Here we present a strategy for engineering chemically activatable protein tyrosine phosphatases (actPTPs). To generate actPTP1B, we introduced three cysteine point mutations in the enzyme's WPD loop. Biarsenical compounds were screened for the capability to bind actPTP1B's WPD loop and increase its phosphatase activity. We identified AsCy3-EDT2 as a robust activator that selectively targets actPTP1B in proteomic mixtures and intact cells. Introduction of the corresponding mutations in T-cell PTP also generates an enzyme (actTCPTP) that is strongly activated by AsCy3-EDT2 . Given the conservation of WPD-loop structure among the classical PTPs, our results potentially provide the groundwork of a widely generalizable approach for generating actPTPs as tools for elucidating PTP signaling roles as well as connections between dysregulated PTP activity and human disease.
Collapse
Affiliation(s)
- Wai Cheung Chan
- Amherst College, Department of Chemistry, Amherst, Massachusetts 01002
| | | | - Anthony C. Bishop
- Amherst College, Department of Chemistry, Amherst, Massachusetts 01002
| |
Collapse
|
164
|
Defining the molecular basis of interaction between R3 receptor-type protein tyrosine phosphatases and VE-cadherin. PLoS One 2017; 12:e0184574. [PMID: 28926625 PMCID: PMC5604967 DOI: 10.1371/journal.pone.0184574] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Accepted: 08/26/2017] [Indexed: 11/19/2022] Open
Abstract
Receptor-type protein tyrosine phosphatases (RPTPs) of the R3 subgroup play key roles in the immune, vascular and nervous systems. They are characterised by a large ectodomain comprising multiple FNIII-like repeats, a transmembrane domain, and a single intracellular phosphatase domain. The functional role of the extracellular region has not been clearly defined and potential roles in ligand interaction, dimerization, and regulation of cell-cell contacts have been reported. Here bimolecular fluorescence complementation (BiFC) in live cells was used to examine the molecular basis for the interaction of VE-PTP with VE-cadherin, two proteins involved in endothelial cell contact and maintenance of vascular integrity. The potential of other R3-PTPs to interact with VE-cadherin was also explored using this method. Quantitative BiFC analysis, using a VE-PTP construct expressing only the ectodomain and transmembrane domain, revealed a specific interaction with VE-cadherin, when compared with controls. Controls were sialophorin, an unrelated membrane protein with a large ectodomain, and a membrane anchored C-terminal Venus-YFP fragment, lacking both ectodomain and transmembrane domains. Truncation of the first 16 FNIII-like repeats from the ectodomain of VE-PTP indicated that removal of this region is not sufficient to disrupt the interaction with VE-cadherin, although it occurs predominantly in an intracellular location. A construct with a deletion of only the 17th domain of VE-PTP was, in contrast to previous studies, still able to interact with VE-cadherin, although this also was predominantly intracellular. Other members of the R3-PTP family (DEP-1, GLEPP1 and SAP-1) also exhibited the potential to interact with VE-cadherin. The direct interaction of DEP-1 with VE-cadherin is likely to be of physiological relevance since both proteins are expressed in endothelial cells. Together the data presented in the study suggest a role for both the ectodomain and transmembrane domain of R3-PTPs in interaction with VE-cadherin.
Collapse
|
165
|
Zhang H, Xiao P, Wong YT, Shen W, Chhabra M, Peltier R, Jiang Y, He Y, He J, Tan Y, Xie Y, Ho D, Lam YW, Sun J, Sun H. Construction of an alkaline phosphatase-specific two-photon probe and its imaging application in living cells and tissues. Biomaterials 2017; 140:220-229. [DOI: 10.1016/j.biomaterials.2017.06.032] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2017] [Revised: 06/08/2017] [Accepted: 06/22/2017] [Indexed: 01/09/2023]
|
166
|
Lipchock JM, Ginther PS, Douglas BB, Bird KE, Patrick Loria J. Exploring protein structure and dynamics through a project-oriented biochemistry laboratory module. BIOCHEMISTRY AND MOLECULAR BIOLOGY EDUCATION : A BIMONTHLY PUBLICATION OF THE INTERNATIONAL UNION OF BIOCHEMISTRY AND MOLECULAR BIOLOGY 2017; 45:403-410. [PMID: 28294503 DOI: 10.1002/bmb.21056] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Revised: 01/30/2017] [Accepted: 02/12/2017] [Indexed: 06/06/2023]
Abstract
Here, we present a 10-week project-oriented laboratory module designed to provide a course-based undergraduate research experience in biochemistry that emphasizes the importance of biomolecular structure and dynamics in enzyme function. This module explores the impact of mutagenesis on an important active site loop for a biomedically-relevant human enzyme, protein tyrosine phosphatase 1B (PTP1B). Over the course of the semester students guide their own mutant of PTP1B from conception to characterization in a cost-effective manner and gain exposure to fundamental techniques in biochemistry, including site-directed DNA mutagenesis, bacterial recombinant protein expression, affinity column purification, protein quantitation, SDS-PAGE, and enzyme kinetics. This project-based approach allows an instructor to simulate a research setting and prepare students for productive research beyond the classroom. Potential modifications to expand or contract this module are also provided. © 2017 by The International Union of Biochemistry and Molecular Biology, 45(5):403-410, 2017.
Collapse
Affiliation(s)
- James M Lipchock
- Department of Chemistry, Washington College, Chestertown, Maryland, 21620
| | - Patrick S Ginther
- Department of Chemistry, Washington College, Chestertown, Maryland, 21620
| | - Bonnie B Douglas
- Department of Chemistry, Washington College, Chestertown, Maryland, 21620
| | - Kelly E Bird
- Department of Chemistry, Washington College, Chestertown, Maryland, 21620
| | - J Patrick Loria
- Department of Chemistry, Yale University, New Haven, Connecticut, 06511
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, Connecticut, 06511
| |
Collapse
|
167
|
Role of ESCRT component HD-PTP/ PTPN23 in cancer. Biochem Soc Trans 2017; 45:845-854. [PMID: 28620046 DOI: 10.1042/bst20160332] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 03/29/2017] [Accepted: 04/07/2017] [Indexed: 12/11/2022]
Abstract
Sustained cellular signalling originated from the receptors located at the plasma membrane is widely associated with cancer susceptibility. Endosomal sorting and degradation of the cell surface receptors is therefore crucial to preventing chronic downstream signalling and tumorigenesis. Since the Endosomal Sorting Complexes Required for Transport (ESCRT) controls these processes, ESCRT components were proposed to act as tumour suppressor genes. However, the bona fide role of ESCRT components in tumorigenesis has not been clearly demonstrated. The ESCRT member HD-PTP/PTPN23 was recently identified as a novel haplo-insufficient tumour suppressor in vitro and in vivo, in mice and humans. In this mini-review, we outline the role of the ESCRT components in cancer and summarize the functions of HD-PTP/PTPN23 in tumorigenesis.
Collapse
|
168
|
Targeting PTPRZ inhibits stem cell-like properties and tumorigenicity in glioblastoma cells. Sci Rep 2017; 7:5609. [PMID: 28717188 PMCID: PMC5514153 DOI: 10.1038/s41598-017-05931-8] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Accepted: 06/06/2017] [Indexed: 01/08/2023] Open
Abstract
The R5 subfamily of receptor-type protein tyrosine phosphatases (RPTPs) comprises PTPRZ and PTPRG. A recent study on primary human glioblastomas suggested a close association between PTPRZ1 (human PTPRZ) expression and cancer stemness. However, the functional roles of PTPRZ activity in glioma stem cells have remained unclear. In the present study, we found that sphere-forming cells from the rat C6 and human U251 glioblastoma cell lines showed high expression levels of PTPRZ-B, the short receptor isoform of PTPRZ. Stable PTPRZ knockdown altered the expression levels of stem cell transcription factors such as SOX2, OLIG2, and POU3F2 and decreased the sphere-forming abilities of these cells. Suppressive effects on the cancer stem-like properties of the cells were also observed following the knockdown of PTPRG. Here, we identified NAZ2329, a cell-permeable small molecule that allosterically inhibits both PTPRZ and PTPRG. NAZ2329 reduced the expression of SOX2 in C6 and U251 cells and abrogated the sphere-forming abilities of these cells. Tumor growth in the C6 xenograft mouse model was significantly slower with the co-treatment of NAZ2329 with temozolomide, an alkylating agent, than with the individual treatments. These results indicate that pharmacological inhibition of R5 RPTPs is a promising strategy for the treatment of malignant gliomas.
Collapse
|
169
|
Leveraging Reciprocity to Identify and Characterize Unknown Allosteric Sites in Protein Tyrosine Phosphatases. J Mol Biol 2017. [PMID: 28625849 DOI: 10.1016/j.jmb.2017.06.009] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Drug-like molecules targeting allosteric sites in proteins are of great therapeutic interest; however, identification of potential sites is not trivial. A straightforward approach to identify hidden allosteric sites is demonstrated in protein tyrosine phosphatases (PTP) by creation of single alanine mutations in the catalytic acid loop of PTP1B and VHR. This approach relies on the reciprocal interactions between an allosteric site and its coupled orthosteric site. The resulting NMR chemical shift perturbations (CSPs) of each mutant reveal clusters of distal residues affected by acid loop mutation. In PTP1B and VHR, two new allosteric clusters were identified in each enzyme. Mutations in these allosteric clusters altered phosphatase activity with changes in kcat/KM ranging from 30% to nearly 100-fold. This work outlines a simple method for identification of new allosteric sites in PTP, and given the basis of this method in thermodynamics, it is expected to be generally useful in other systems.
Collapse
|
170
|
Yang F, Xie F, Zhang Y, Xia Y, Liu W, Jiang F, Lam C, Qiao Y, Xie D, Li J, Fu L. Y-shaped bis-arylethenesulfonic acid esters: Potential potent and membrane permeable protein tyrosine phosphatase 1B inhibitors. Bioorg Med Chem Lett 2017; 27:2166-2170. [DOI: 10.1016/j.bmcl.2017.03.060] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Revised: 03/07/2017] [Accepted: 03/22/2017] [Indexed: 12/31/2022]
|
171
|
Zhang X, Maity T, Kashyap MK, Bansal M, Venugopalan A, Singh S, Awasthi S, Marimuthu A, Charles Jacob HK, Belkina N, Pitts S, Cultraro CM, Gao S, Kirkali G, Biswas R, Chaerkady R, Califano A, Pandey A, Guha U. Quantitative Tyrosine Phosphoproteomics of Epidermal Growth Factor Receptor (EGFR) Tyrosine Kinase Inhibitor-treated Lung Adenocarcinoma Cells Reveals Potential Novel Biomarkers of Therapeutic Response. Mol Cell Proteomics 2017; 16:891-910. [PMID: 28331001 PMCID: PMC5417828 DOI: 10.1074/mcp.m117.067439] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 02/24/2017] [Indexed: 02/05/2023] Open
Abstract
Mutations in the Epidermal growth factor receptor (EGFR) kinase domain, such as the L858R missense mutation and deletions spanning the conserved sequence 747LREA750, are sensitive to tyrosine kinase inhibitors (TKIs). The gatekeeper site residue mutation, T790M accounts for around 60% of acquired resistance to EGFR TKIs. The first generation EGFR TKIs, erlotinib and gefitinib, and the second generation inhibitor, afatinib are FDA approved for initial treatment of EGFR mutated lung adenocarcinoma. The predominant biomarker of EGFR TKI responsiveness is the presence of EGFR TKI-sensitizing mutations. However, 30-40% of patients with EGFR mutations exhibit primary resistance to these TKIs, underscoring the unmet need of identifying additional biomarkers of treatment response. Here, we sought to characterize the dynamics of tyrosine phosphorylation upon EGFR TKI treatment of mutant EGFR-driven human lung adenocarcinoma cell lines with varying sensitivity to EGFR TKIs, erlotinib and afatinib. We employed stable isotope labeling with amino acids in cell culture (SILAC)-based quantitative mass spectrometry to identify and quantify tyrosine phosphorylated peptides. The proportion of tyrosine phosphorylated sites that had reduced phosphorylation upon erlotinib or afatinib treatment correlated with the degree of TKI-sensitivity. Afatinib, an irreversible EGFR TKI, more effectively inhibited tyrosine phosphorylation of a majority of the substrates. The phosphosites with phosphorylation SILAC ratios that correlated with the TKI-sensitivity of the cell lines include sites on kinases, such as EGFR-Y1197 and MAPK7-Y221, and adaptor proteins, such as SHC1-Y349/350, ERRFI1-Y394, GAB1-Y689, STAT5A-Y694, DLG3-Y705, and DAPP1-Y139, suggesting these are potential biomarkers of TKI sensitivity. DAPP1, is a novel target of mutant EGFR signaling and Y-139 is the major site of DAPP1 tyrosine phosphorylation. We also uncovered several off-target effects of these TKIs, such as MST1R-Y1238/Y1239 and MET-Y1252/1253. This study provides unique insight into the TKI-mediated modulation of mutant EGFR signaling, which can be applied to the development of biomarkers of EGFR TKI response.
Collapse
Affiliation(s)
- Xu Zhang
- From the ‡Thoracic and Gastrointestinal Oncology Branch, Center for Cancer Research, NCI, NIH, Bethesda, Maryland, 20892
| | - Tapan Maity
- From the ‡Thoracic and Gastrointestinal Oncology Branch, Center for Cancer Research, NCI, NIH, Bethesda, Maryland, 20892
| | - Manoj K Kashyap
- §Johns Hopkins University School of Medicine, Baltimore, Maryland, 21205
| | - Mukesh Bansal
- ¶Department of System Biology, Columbia University, New York, New York, 10032
- ‖PsychoGenics Inc., Tarrytown, New York, 10591
| | - Abhilash Venugopalan
- From the ‡Thoracic and Gastrointestinal Oncology Branch, Center for Cancer Research, NCI, NIH, Bethesda, Maryland, 20892
| | - Sahib Singh
- From the ‡Thoracic and Gastrointestinal Oncology Branch, Center for Cancer Research, NCI, NIH, Bethesda, Maryland, 20892
| | - Shivangi Awasthi
- From the ‡Thoracic and Gastrointestinal Oncology Branch, Center for Cancer Research, NCI, NIH, Bethesda, Maryland, 20892
| | | | | | - Natalya Belkina
- From the ‡Thoracic and Gastrointestinal Oncology Branch, Center for Cancer Research, NCI, NIH, Bethesda, Maryland, 20892
| | - Stephanie Pitts
- From the ‡Thoracic and Gastrointestinal Oncology Branch, Center for Cancer Research, NCI, NIH, Bethesda, Maryland, 20892
| | - Constance M Cultraro
- From the ‡Thoracic and Gastrointestinal Oncology Branch, Center for Cancer Research, NCI, NIH, Bethesda, Maryland, 20892
| | - Shaojian Gao
- From the ‡Thoracic and Gastrointestinal Oncology Branch, Center for Cancer Research, NCI, NIH, Bethesda, Maryland, 20892
| | - Guldal Kirkali
- From the ‡Thoracic and Gastrointestinal Oncology Branch, Center for Cancer Research, NCI, NIH, Bethesda, Maryland, 20892
| | - Romi Biswas
- From the ‡Thoracic and Gastrointestinal Oncology Branch, Center for Cancer Research, NCI, NIH, Bethesda, Maryland, 20892
| | - Raghothama Chaerkady
- §Johns Hopkins University School of Medicine, Baltimore, Maryland, 21205
- **Medimmune LLC, Gaithersburg, Maryland, 20878
| | - Andrea Califano
- ¶Department of System Biology, Columbia University, New York, New York, 10032
| | - Akhilesh Pandey
- §Johns Hopkins University School of Medicine, Baltimore, Maryland, 21205
| | - Udayan Guha
- From the ‡Thoracic and Gastrointestinal Oncology Branch, Center for Cancer Research, NCI, NIH, Bethesda, Maryland, 20892;
| |
Collapse
|
172
|
Palma A, Tinti M, Paoluzi S, Santonico E, Brandt BW, Hooft van Huijsduijnen R, Masch A, Heringa J, Schutkowski M, Castagnoli L, Cesareni G. Both Intrinsic Substrate Preference and Network Context Contribute to Substrate Selection of Classical Tyrosine Phosphatases. J Biol Chem 2017; 292:4942-4952. [PMID: 28159843 DOI: 10.1074/jbc.m116.757518] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 01/31/2017] [Indexed: 01/19/2023] Open
Abstract
Reversible tyrosine phosphorylation is a widespread post-translational modification mechanism underlying cell physiology. Thus, understanding the mechanisms responsible for substrate selection by kinases and phosphatases is central to our ability to model signal transduction at a system level. Classical protein-tyrosine phosphatases can exhibit substrate specificity in vivo by combining intrinsic enzymatic specificity with the network of protein-protein interactions, which positions the enzymes in close proximity to their substrates. Here we use a high throughput approach, based on high density phosphopeptide chips, to determine the in vitro substrate preference of 16 members of the protein-tyrosine phosphatase family. This approach helped identify one residue in the substrate binding pocket of the phosphatase domain that confers specificity for phosphopeptides in a specific sequence context. We also present a Bayesian model that combines intrinsic enzymatic specificity and interaction information in the context of the human protein interaction network to infer new phosphatase substrates at the proteome level.
Collapse
Affiliation(s)
- Anita Palma
- From the Department of Biology, University of Rome Tor Vergata, 00133 Rome, Italy
| | - Michele Tinti
- From the Department of Biology, University of Rome Tor Vergata, 00133 Rome, Italy
| | - Serena Paoluzi
- From the Department of Biology, University of Rome Tor Vergata, 00133 Rome, Italy
| | - Elena Santonico
- From the Department of Biology, University of Rome Tor Vergata, 00133 Rome, Italy
| | - Bernd Willem Brandt
- the Centre for Integrative Bioinformatics, Vrije Universiteit, 1081 HV Amsterdam, The Netherlands, and
| | | | - Antonia Masch
- the Institut für Biochemie & Biotechnologie, Martin-Luther-Universität Halle-Wittenberg, 06108 Halle, Germany
| | - Jaap Heringa
- the Centre for Integrative Bioinformatics, Vrije Universiteit, 1081 HV Amsterdam, The Netherlands, and
| | - Mike Schutkowski
- the Institut für Biochemie & Biotechnologie, Martin-Luther-Universität Halle-Wittenberg, 06108 Halle, Germany
| | - Luisa Castagnoli
- From the Department of Biology, University of Rome Tor Vergata, 00133 Rome, Italy
| | - Gianni Cesareni
- From the Department of Biology, University of Rome Tor Vergata, 00133 Rome, Italy,
| |
Collapse
|
173
|
Dong H, Ma L, Gan J, Lin W, Chen C, Yao Z, Du L, Zheng L, Ke C, Huang X, Song H, Kumar R, Yeung SC, Zhang H. PTPRO represses ERBB2-driven breast oncogenesis by dephosphorylation and endosomal internalization of ERBB2. Oncogene 2017; 36:410-422. [PMID: 27345410 PMCID: PMC5269534 DOI: 10.1038/onc.2016.213] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Revised: 05/05/2016] [Accepted: 05/08/2016] [Indexed: 02/05/2023]
Abstract
The plasma membrane-associated tyrosine phosphatase PTPRO is frequently transcriptionally repressed in cancers and signifies poor prognosis of breast cancer patients. In this study, deletion of Ptpro in MMTV-Erbb2 transgenic mice dramatically shortened the mammary tumor latency and accelerated tumor growth due to loss of Ptpro within the breast cancer cells but not in surrounding tissue as confirmed by hetero-transplantation studies. Both in vitro and in vivo data demonstrated that the phosphatase activity was required for the inactivation of ERBB2 and its downstream signaling. PTPRO regulated the phosphorylation status of ERBB2 at Y1248. Co-immunoprecipitation and proximity ligation assay (Duolink) indicated that PTPRO directly physically interacted with ERBB2. Moreover, PTPRO phosphatase activity shortened the half-life of ERBB2 by increasing endocytotic degradation. PTPRO reexpression by demethylation treatment using 5-azacytidine reduced the proliferation and colony formation potential in ERBB2-positive breast cancer cells. Taken together, PTPRO inhibited ERBB2-driven breast cancer through dephosphorylation leading to dual effects of ERBB2 signaling suppression and endosomal internalization of ERBB2, Therefore, reexpression of PTPRO may be a potential therapy for ERBB2-overexpressing breast cancer.
Collapse
Affiliation(s)
- H Dong
- Cancer Research Center, Shantou University Medical College, Shantou, China
| | - L Ma
- Department of Gastroenterology, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - J Gan
- Cancer Research Center, Shantou University Medical College, Shantou, China
| | - W Lin
- Cancer Research Center, Shantou University Medical College, Shantou, China
| | - C Chen
- Cancer Research Center, Shantou University Medical College, Shantou, China
| | - Z Yao
- Cancer Research Center, Shantou University Medical College, Shantou, China
| | - L Du
- Cancer Research Center, Shantou University Medical College, Shantou, China
| | - L Zheng
- Cancer Research Center, Shantou University Medical College, Shantou, China
| | - C Ke
- Cancer Research Center, Shantou University Medical College, Shantou, China
| | - X Huang
- MOE Key Laboratory of Model Animal for Disease Study, Model Animal Research Center of Nanjing University, Nanjing, China
| | - H Song
- Department of Cell Biology, Xi'an Jiaotong University Suzhou Academy, Suzhou, China
| | - R Kumar
- Department of Biochemistry and Molecular Medicine, School of Medicine and Health Sciences, George Washington University, Washington DC, USA
| | - S C Yeung
- Cancer Research Center, Shantou University Medical College, Shantou, China
- Department of Emergency Medicine, University of Texas MD Anderson Cancer Center, Houston, TX, USA
- Department of Endocrine Neoplasia and Hormonal Disorders, University of Texas MD Anderson Cancer Center, Houston, TX, USA
- Department of Endocrine Neoplasia and Hormonal Disorders, University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX 77030, USA. E-mail:
| | - H Zhang
- Cancer Research Center, Shantou University Medical College, Shantou, China
- Department of Biotherapy, Affiliated Cancer Hospital of Shantou University Medical College, Shantou, China
- Cancer Research Center, Shantou University Medical College, Xinling Road No. 22, Shantou 515041, ChinaE-mail:
| |
Collapse
|
174
|
Baßler J, Ahmed YL, Kallas M, Kornprobst M, Calviño FR, Gnädig M, Thoms M, Stier G, Ismail S, Kharde S, Castillo N, Griesel S, Bastuck S, Bradatsch B, Thomson E, Flemming D, Sinning I, Hurt E. Interaction network of the ribosome assembly machinery from a eukaryotic thermophile. Protein Sci 2017; 26:327-342. [PMID: 27863450 DOI: 10.1002/pro.3085] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Revised: 10/24/2016] [Accepted: 11/08/2016] [Indexed: 12/30/2022]
Abstract
Ribosome biogenesis in eukaryotic cells is a highly dynamic and complex process innately linked to cell proliferation. The assembly of ribosomes is driven by a myriad of biogenesis factors that shape pre-ribosomal particles by processing and folding the ribosomal RNA and incorporating ribosomal proteins. Biochemical approaches allowed the isolation and characterization of pre-ribosomal particles from Saccharomyces cerevisiae, which lead to a spatiotemporal map of biogenesis intermediates along the path from the nucleolus to the cytoplasm. Here, we cloned almost the entire set (∼180) of ribosome biogenesis factors from the thermophilic fungus Chaetomium thermophilum in order to perform an in-depth analysis of their protein-protein interaction network as well as exploring the suitability of these thermostable proteins for structural studies. First, we performed a systematic screen, testing about 80 factors for crystallization and structure determination. Next, we performed a yeast 2-hybrid analysis and tested about 32,000 binary combinations, which identified more than 1000 protein-protein contacts between the thermophilic ribosome assembly factors. To exemplary verify several of these interactions, we performed biochemical reconstitution with the focus on the interaction network between 90S pre-ribosome factors forming the ctUTP-A and ctUTP-B modules, and the Brix-domain containing assembly factors of the pre-60S subunit. Our work provides a rich resource for biochemical reconstitution and structural analyses of the conserved ribosome assembly machinery from a eukaryotic thermophile.
Collapse
Affiliation(s)
- Jochen Baßler
- Biochemistry Center Heidelberg BZH, University of Heidelberg, Heidelberg, 69120, Germany
| | - Yasar Luqman Ahmed
- Biochemistry Center Heidelberg BZH, University of Heidelberg, Heidelberg, 69120, Germany
| | - Martina Kallas
- Biochemistry Center Heidelberg BZH, University of Heidelberg, Heidelberg, 69120, Germany
| | - Markus Kornprobst
- Biochemistry Center Heidelberg BZH, University of Heidelberg, Heidelberg, 69120, Germany
| | - Fabiola R Calviño
- Biochemistry Center Heidelberg BZH, University of Heidelberg, Heidelberg, 69120, Germany
| | - Marén Gnädig
- Biochemistry Center Heidelberg BZH, University of Heidelberg, Heidelberg, 69120, Germany
| | - Matthias Thoms
- Biochemistry Center Heidelberg BZH, University of Heidelberg, Heidelberg, 69120, Germany
| | - Gunter Stier
- Biochemistry Center Heidelberg BZH, University of Heidelberg, Heidelberg, 69120, Germany
| | - Sherif Ismail
- Biochemistry Center Heidelberg BZH, University of Heidelberg, Heidelberg, 69120, Germany
| | - Satyavati Kharde
- Biochemistry Center Heidelberg BZH, University of Heidelberg, Heidelberg, 69120, Germany
| | - Nestor Castillo
- Biochemistry Center Heidelberg BZH, University of Heidelberg, Heidelberg, 69120, Germany
| | - Sabine Griesel
- Biochemistry Center Heidelberg BZH, University of Heidelberg, Heidelberg, 69120, Germany
| | - Sonja Bastuck
- Biochemistry Center Heidelberg BZH, University of Heidelberg, Heidelberg, 69120, Germany
| | - Bettina Bradatsch
- Biochemistry Center Heidelberg BZH, University of Heidelberg, Heidelberg, 69120, Germany
| | - Emma Thomson
- Biochemistry Center Heidelberg BZH, University of Heidelberg, Heidelberg, 69120, Germany
| | - Dirk Flemming
- Biochemistry Center Heidelberg BZH, University of Heidelberg, Heidelberg, 69120, Germany
| | - Irmgard Sinning
- Biochemistry Center Heidelberg BZH, University of Heidelberg, Heidelberg, 69120, Germany
| | - Ed Hurt
- Biochemistry Center Heidelberg BZH, University of Heidelberg, Heidelberg, 69120, Germany
| |
Collapse
|
175
|
Lipchock JM, Hendrickson HP, Douglas BB, Bird KE, Ginther PS, Rivalta I, Ten NS, Batista VS, Loria JP. Characterization of Protein Tyrosine Phosphatase 1B Inhibition by Chlorogenic Acid and Cichoric Acid. Biochemistry 2017; 56:96-106. [PMID: 27959494 PMCID: PMC5292209 DOI: 10.1021/acs.biochem.6b01025] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Protein tyrosine phosphatase 1B (PTP1B) is a known regulator of the insulin and leptin signaling pathways and is an active target for the design of inhibitors for the treatment of type II diabetes and obesity. Recently, cichoric acid (CHA) and chlorogenic acid (CGA) were predicted by docking methods to be allosteric inhibitors that bind distal to the active site. However, using a combination of steady-state inhibition kinetics, solution nuclear magnetic resonance experiments, and molecular dynamics simulations, we show that CHA is a competitive inhibitor that binds in the active site of PTP1B. CGA, while a noncompetitive inhibitor, binds in the second aryl phosphate binding site, rather than the predicted benzfuran binding pocket. The molecular dynamics simulations of the apo enzyme and cysteine-phosphoryl intermediate states with and without bound CGA suggest CGA binding inhibits PTP1B by altering hydrogen bonding patterns at the active site. This study provides a mechanistic understanding of the allosteric inhibition of PTP1B.
Collapse
Affiliation(s)
- James M. Lipchock
- Department of Chemistry, Washington College, Chestertown, Maryland 21620, United States
| | - Heidi P. Hendrickson
- Department of Chemistry, Yale University, New Haven, Connecticut 06511, United States
| | - Bonnie B. Douglas
- Department of Chemistry, Washington College, Chestertown, Maryland 21620, United States
- Department of Chemistry, Yale University, New Haven, Connecticut 06511, United States
| | - Kelly E. Bird
- Department of Chemistry, Washington College, Chestertown, Maryland 21620, United States
- Department of Chemistry, Yale University, New Haven, Connecticut 06511, United States
| | - Patrick S. Ginther
- Department of Chemistry, Washington College, Chestertown, Maryland 21620, United States
- Department of Chemistry, Yale University, New Haven, Connecticut 06511, United States
| | - Ivan Rivalta
- Department of Chemistry, Yale University, New Haven, Connecticut 06511, United States
- Univ Lyon, Ens de Lyon, CNRS, Université Lyon 1, Laboratoire de Chimie UMR 5182, F-69342, Lyon, France
| | - Nicholas S. Ten
- Department of Chemistry, Yale University, New Haven, Connecticut 06511, United States
| | - Victor S. Batista
- Department of Chemistry, Yale University, New Haven, Connecticut 06511, United States
| | - J. Patrick Loria
- Department of Chemistry, Yale University, New Haven, Connecticut 06511, United States
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, Connecticut 06511, United States
| |
Collapse
|
176
|
Bishop AC. A missense methionine mutation augments catalytic activity but reduces thermal stability in two protein tyrosine phosphatases. Biochem Biophys Res Commun 2016; 481:153-158. [PMID: 27816449 PMCID: PMC5118098 DOI: 10.1016/j.bbrc.2016.11.001] [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: 10/20/2016] [Accepted: 11/01/2016] [Indexed: 11/23/2022]
Abstract
Recent data sets that catalog the missense mutations in thousands of human genomes have revealed a vast and largely unexplored world of non-canonical protein sequences that are expressed in humans. The functional consequences of most human missense mutations, however, are unknown, and the accuracy with which their effects can be predicted by computational algorithms remains unclear. Among humans of European descent, the most common missense mutation in the catalytic domain of SH2-containing protein tyrosine phosphatase 1 (SHP-1) converts the enzyme's canonical valine 451 to methionine (V451M). The V451M mutation lies in a conserved motif adjacent to the protein tyrosine phosphatase (PTP) consensus sequence and is predicted to compromise catalytic function. In this study it is shown that, counter to prediction, V451M SHP-1 possesses increased catalytic activity as compared to the wild-type enzyme. Additionally, a PTP-wide search of missense-mutation data revealed a variant of one other PTP, Fas-associated PTP (FAP-1), that contains a methionine mutation at the position corresponding to 451 of SHP-1 (T2406M FAP-1). It is shown here that the T2406M mutation increases FAP-1's PTP activity, to a degree that is comparable to the activation deriving from the V451M mutation in SHP-1. Although the two non-canonical methionine residues confer increased activity at moderate temperatures, both V451M SHP-1 and T2406M FAP-1 are less thermally stable than their canonical counterparts, as demonstrated by the mutants' strongly reduced activities at high temperatures. These results highlight the challenges in predicting the functional consequences of missense mutations, which can differ under varying conditions, and suggest that, with regard to position 451/2406, canonical PTP domains have "chosen" stability over optimized activity during the course of evolution.
Collapse
Affiliation(s)
- Anthony C Bishop
- Amherst College, Department of Chemistry, Amherst, MA 01002, USA.
| |
Collapse
|
177
|
Skrzypczynska KM, Zhu JW, Weiss A. Positive Regulation of Lyn Kinase by CD148 Is Required for B Cell Receptor Signaling in B1 but Not B2 B Cells. Immunity 2016; 45:1232-1244. [PMID: 27889108 DOI: 10.1016/j.immuni.2016.10.013] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Revised: 08/09/2016] [Accepted: 09/01/2016] [Indexed: 12/31/2022]
Abstract
B1 and B2 B cells differ in their ability to respond to T-cell-independent (TI) antigens. Here we report that the Src-family kinase (SFK) regulator CD148 has a unique and critical role in the initiation of B1 but not B2 cell antigen receptor signaling. CD148 loss-of-function mice were found to have defective B1 B-cell-mediated antibody responses against the T-cell-independent antigens NP-ficoll and Pneumovax 23 and had impaired selection of the B1 B cell receptor (BCR) repertoire. These deficiencies were associated with a decreased ability of B1 B cells to induce BCR signaling downstream of the SFK Lyn. Notably, Lyn appeared to be selectively regulated by CD148 and loss of this SFK resulted in opposite signaling phenotypes in B1 and B2 B cells. These findings reveal that the function and regulation of Lyn during B1 cell BCR signaling is distinct from other B cell subsets.
Collapse
Affiliation(s)
- Katarzyna M Skrzypczynska
- Howard Hughes Medical Institute, Rosalind Russell and Ephraim P. Engleman Rheumatology Research Center, Departments of Medicine and of Microbiology and Immunology, University of California, San Francisco, San Francisco, CA 94143-0795, USA
| | - Jing W Zhu
- Howard Hughes Medical Institute, Rosalind Russell and Ephraim P. Engleman Rheumatology Research Center, Departments of Medicine and of Microbiology and Immunology, University of California, San Francisco, San Francisco, CA 94143-0795, USA
| | - Arthur Weiss
- Howard Hughes Medical Institute, Rosalind Russell and Ephraim P. Engleman Rheumatology Research Center, Departments of Medicine and of Microbiology and Immunology, University of California, San Francisco, San Francisco, CA 94143-0795, USA.
| |
Collapse
|
178
|
Abstract
Tuberculosis is an infectious disease associated with significant mortality and morbidity worldwide, particularly in developing countries. The rise of antibiotic resistance in Mycobacterium tuberculosis (Mtb) urgently demands the development of new drug leads to tackle resistant strains. Fragment-based methods have recently emerged at the forefront of pharmaceutical development as a means to generate more effective lead structures, via the identification of fragment molecules that form weak but high quality interactions with the target biomolecule and subsequent fragment optimization. This review highlights a number of novel inhibitors of Mtb targets that have been developed through fragment-based approaches in recent years.
Collapse
|
179
|
The Intersection of Structural and Chemical Biology - An Essential Synergy. Cell Chem Biol 2016; 23:173-182. [PMID: 26933743 DOI: 10.1016/j.chembiol.2015.12.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2015] [Revised: 12/04/2015] [Accepted: 12/04/2015] [Indexed: 12/22/2022]
Abstract
The continual improvement in our ability to generate high resolution structural models of biological molecules has stimulated and supported innovative chemical biology projects that target increasingly challenging ligand interaction sites. In this review we outline some of the recent developments in chemical biology and rational ligand design and show selected examples that illustrate the synergy between these research areas.
Collapse
|
180
|
Zhang G, Scarborough H, Kim J, Rozhok AI, Chen YA, Zhang X, Song L, Bai Y, Fang B, Liu RZ, Koomen J, Tan AC, Degregori J, Haura EB. Coupling an EML4-ALK-centric interactome with RNA interference identifies sensitizers to ALK inhibitors. Sci Signal 2016; 9:rs12. [PMID: 27811184 DOI: 10.1126/scisignal.aaf5011] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Patients with lung cancers harboring anaplastic lymphoma kinase (ALK) gene fusions benefit from treatment with ALK inhibitors, but acquired resistance inevitably arises. A better understanding of proximal ALK signaling mechanisms may identify sensitizers to ALK inhibitors that disrupt the balance between prosurvival and proapoptotic effector signals. Using affinity purification coupled with mass spectrometry in an ALK fusion lung cancer cell line (H3122), we generated an ALK signaling network and investigated signaling activity using tyrosine phosphoproteomics. We identified a network of 464 proteins composed of subnetworks with differential response to ALK inhibitors. A small hairpin RNA screen targeting 407 proteins in this network revealed 64 and 9 proteins that when knocked down sensitized cells to crizotinib and alectinib, respectively. Among these, knocking down fibroblast growth factor receptor substrate 2 (FRS2) or coiled-coil and C2 domain-containing protein 1A (CC2D1A), both scaffolding proteins, sensitized multiple ALK fusion cell lines to the ALK inhibitors crizotinib and alectinib. Collectively, our data set provides a resource that enhances our understanding of signaling and drug resistance networks consequent to ALK fusions and identifies potential targets to improve the efficacy of ALK inhibitors in patients.
Collapse
Affiliation(s)
- Guolin Zhang
- Department of Thoracic Oncology, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL 33612, USA
| | - Hannah Scarborough
- Department of Biochemistry and Molecular Genetics, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Jihye Kim
- Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Andrii I Rozhok
- Department of Biochemistry and Molecular Genetics, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Yian Ann Chen
- Department of Biostatistics and Bioinformatics, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL 33612, USA
| | - Xiaohui Zhang
- Department of Hematopathology and Laboratory Medicine, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL 33612, USA
| | - Lanxi Song
- Department of Thoracic Oncology, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL 33612, USA
| | - Yun Bai
- Department of Thoracic Oncology, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL 33612, USA
| | - Bin Fang
- Proteomics Core Facility, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL 33612, USA
| | - Richard Z Liu
- Department of Biostatistics and Bioinformatics, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL 33612, USA
| | - John Koomen
- Department of Molecular Oncology Program, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL 33612, USA
| | - Aik Choon Tan
- Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - James Degregori
- Department of Biochemistry and Molecular Genetics, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Eric B Haura
- Department of Thoracic Oncology, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL 33612, USA.
| |
Collapse
|
181
|
Ge L, Li KS, Li MM, Xiao P, Hou XB, Chen X, Liu HD, Lin A, Yu X, Ren GJ, Fang H, Sun JP. Identification of a benzo imidazole thiazole derivative as the specific irreversible inhibitor of protein tyrosine phosphatase. Bioorg Med Chem Lett 2016; 26:4795-4798. [DOI: 10.1016/j.bmcl.2016.08.024] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 08/06/2016] [Accepted: 08/10/2016] [Indexed: 10/21/2022]
|
182
|
Ghattas MA, Raslan N, Sadeq A, Al Sorkhy M, Atatreh N. Druggability analysis and classification of protein tyrosine phosphatase active sites. DRUG DESIGN DEVELOPMENT AND THERAPY 2016; 10:3197-3209. [PMID: 27757011 PMCID: PMC5053377 DOI: 10.2147/dddt.s111443] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Protein tyrosine phosphatases (PTP) play important roles in the pathogenesis of many diseases. The fact that no PTP inhibitors have reached the market so far has raised many questions about their druggability. In this study, the active sites of 17 PTPs were characterized and assessed for its ability to bind drug-like molecules. Consequently, PTPs were classified according to their druggability scores into four main categories. Only four members showed intermediate to very druggable pocket; interestingly, the rest of them exhibited poor druggability. Particularly focusing on PTP1B, we also demonstrated the influence of several factors on the druggability of PTP active site. For instance, the open conformation showed better druggability than the closed conformation, while the tight-bound water molecules appeared to have minimal effect on the PTP1B druggability. Finally, the allosteric site of PTP1B was found to exhibit superior druggability compared to the catalytic pocket. This analysis can prove useful in the discovery of new PTP inhibitors by assisting researchers in predicting hit rates from high throughput or virtual screening and saving unnecessary cost, time, and efforts via prioritizing PTP targets according to their predicted druggability.
Collapse
Affiliation(s)
- Mohammad A Ghattas
- College of Pharmacy, Al Ain University of Science and Technology, Al Ain, UAE
| | - Noor Raslan
- College of Pharmacy, Al Ain University of Science and Technology, Al Ain, UAE
| | - Asil Sadeq
- College of Pharmacy, Al Ain University of Science and Technology, Al Ain, UAE
| | - Mohammad Al Sorkhy
- College of Pharmacy, Al Ain University of Science and Technology, Al Ain, UAE
| | - Noor Atatreh
- College of Pharmacy, Al Ain University of Science and Technology, Al Ain, UAE
| |
Collapse
|
183
|
Crystallization of PTP Domains. Methods Mol Biol 2016. [PMID: 27514806 DOI: 10.1007/978-1-4939-3746-2_10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
Protein crystallography is the most powerful method to obtain atomic resolution information on the three-dimensional structure of proteins. An essential step towards determining the crystallographic structure of a protein is to produce good quality crystals from a concentrated sample of purified protein. These crystals are then used to obtain X-ray diffraction data necessary to determine the 3D structure by direct phasing or molecular replacement if the model of a homologous protein is available. Here, we describe the main approaches and techniques to obtain suitable crystals for X-ray diffraction. We include tools and guidance on how to evaluate and design the protein construct, how to prepare Se-methionine derivatized protein, how to assess the stability and quality of the sample, and how to crystallize and prepare crystals for diffraction experiments. While general strategies for protein crystallization are summarized, specific examples of the application of these strategies to the crystallization of PTP domains are discussed.
Collapse
|
184
|
Kuboyama K, Fujikawa A, Suzuki R, Tanga N, Noda M. Role of Chondroitin Sulfate (CS) Modification in the Regulation of Protein-tyrosine Phosphatase Receptor Type Z (PTPRZ) Activity: PLEIOTROPHIN-PTPRZ-A SIGNALING IS INVOLVED IN OLIGODENDROCYTE DIFFERENTIATION. J Biol Chem 2016; 291:18117-28. [PMID: 27445335 DOI: 10.1074/jbc.m116.742536] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Indexed: 11/06/2022] Open
Abstract
Protein-tyrosine phosphatase receptor type Z (PTPRZ) is predominantly expressed in the developing brain as a CS proteoglycan. PTPRZ has long (PTPRZ-A) and short type (PTPRZ-B) receptor forms by alternative splicing. The extracellular CS moiety of PTPRZ is required for high-affinity binding to inhibitory ligands, such as pleiotrophin (PTN), midkine, and interleukin-34; however, its functional significance in regulating PTPRZ activity remains obscure. We herein found that protein expression of CS-modified PTPRZ-A began earlier, peaking at approximately postnatal days 5-10 (P5-P10), and then that of PTN peaked at P10 at the developmental stage corresponding to myelination onset in the mouse brain. Ptn-deficient mice consistently showed a later onset of the expression of myelin basic protein, a major component of the myelin sheath, than wild-type mice. Upon ligand application, PTPRZ-A/B in cultured oligodendrocyte precursor cells exhibited punctate localization on the cell surface instead of diffuse distribution, causing the inactivation of PTPRZ and oligodendrocyte differentiation. The same effect was observed with the removal of CS chains with chondroitinase ABC but not polyclonal antibodies against the extracellular domain of PTPRZ. These results indicate that the negatively charged CS moiety prevents PTPRZ from spontaneously clustering and that the positively charged ligand PTN induces PTPRZ clustering, potentially by neutralizing electrostatic repulsion between CS chains. Taken altogether, these data indicate that PTN-PTPRZ-A signaling controls the timing of oligodendrocyte precursor cell differentiation in vivo, in which the CS moiety of PTPRZ receptors maintains them in a monomeric active state until its ligand binding.
Collapse
Affiliation(s)
- Kazuya Kuboyama
- From the Division of Molecular Neurobiology, National Institute for Basic Biology (NIBB) and
| | - Akihiro Fujikawa
- From the Division of Molecular Neurobiology, National Institute for Basic Biology (NIBB) and
| | - Ryoko Suzuki
- From the Division of Molecular Neurobiology, National Institute for Basic Biology (NIBB) and
| | - Naomi Tanga
- From the Division of Molecular Neurobiology, National Institute for Basic Biology (NIBB) and the School of Life Science, Graduate University for Advanced Studies (SOKENDAI), 5-1 Higashiyama, Myodaiji-cho, Okazaki, Aichi 444-8787, Japan
| | - Masaharu Noda
- From the Division of Molecular Neurobiology, National Institute for Basic Biology (NIBB) and the School of Life Science, Graduate University for Advanced Studies (SOKENDAI), 5-1 Higashiyama, Myodaiji-cho, Okazaki, Aichi 444-8787, Japan
| |
Collapse
|
185
|
Chang VT, Fernandes RA, Ganzinger KA, Lee SF, Siebold C, McColl J, Jönsson P, Palayret M, Harlos K, Coles CH, Jones EY, Lui Y, Huang E, Gilbert RJC, Klenerman D, Aricescu AR, Davis SJ. Initiation of T cell signaling by CD45 segregation at 'close contacts'. Nat Immunol 2016; 17:574-582. [PMID: 26998761 PMCID: PMC4839504 DOI: 10.1038/ni.3392] [Citation(s) in RCA: 207] [Impact Index Per Article: 25.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Accepted: 12/29/2015] [Indexed: 12/14/2022]
Abstract
It has been proposed that the local segregation of kinases and the tyrosine phosphatase CD45 underpins T cell antigen receptor (TCR) triggering, but how such segregation occurs and whether it can initiate signaling is unclear. Using structural and biophysical analysis, we show that the extracellular region of CD45 is rigid and extends beyond the distance spanned by TCR-ligand complexes, implying that sites of TCR-ligand engagement would sterically exclude CD45. We also show that the formation of 'close contacts', new structures characterized by spontaneous CD45 and kinase segregation at the submicron-scale, initiates signaling even when TCR ligands are absent. Our work reveals the structural basis for, and the potent signaling effects of, local CD45 and kinase segregation. TCR ligands have the potential to heighten signaling simply by holding receptors in close contacts.
Collapse
Affiliation(s)
- Veronica T Chang
- Radcliffe Department of Medicine and MRC Human Immunology Unit, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DS, United Kingdom
| | - Ricardo A Fernandes
- Radcliffe Department of Medicine and MRC Human Immunology Unit, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DS, United Kingdom
| | | | - Steven F Lee
- Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW
| | - Christian Siebold
- Division of Structural Biology, Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford OX3 7BN
| | - James McColl
- Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW
| | - Peter Jönsson
- Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW
| | - Matthieu Palayret
- Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW
| | - Karl Harlos
- Division of Structural Biology, Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford OX3 7BN
| | - Charlotte H Coles
- Division of Structural Biology, Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford OX3 7BN
| | - E Yvonne Jones
- Division of Structural Biology, Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford OX3 7BN
| | - Yuan Lui
- Radcliffe Department of Medicine and MRC Human Immunology Unit, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DS, United Kingdom
| | - Elizabeth Huang
- Radcliffe Department of Medicine and MRC Human Immunology Unit, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DS, United Kingdom
| | - Robert J C Gilbert
- Division of Structural Biology, Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford OX3 7BN
| | - David Klenerman
- Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW
| | - A Radu Aricescu
- Division of Structural Biology, Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford OX3 7BN
| | - Simon J Davis
- Radcliffe Department of Medicine and MRC Human Immunology Unit, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DS, United Kingdom
| |
Collapse
|
186
|
Li H, Yang F, Liu C, Xiao P, Xu Y, Liang Z, Liu C, Wang H, Wang W, Zheng W, Zhang W, Ma X, He D, Song X, Cui F, Xu Z, Yi F, Sun JP, Yu X. Crystal Structure and Substrate Specificity of PTPN12. Cell Rep 2016; 15:1345-58. [DOI: 10.1016/j.celrep.2016.04.016] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Revised: 01/27/2016] [Accepted: 03/29/2016] [Indexed: 01/21/2023] Open
|
187
|
Zhang ZY, Dodd GT, Tiganis T. Protein Tyrosine Phosphatases in Hypothalamic Insulin and Leptin Signaling. Trends Pharmacol Sci 2016; 36:661-674. [PMID: 26435211 DOI: 10.1016/j.tips.2015.07.003] [Citation(s) in RCA: 100] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Revised: 07/01/2015] [Accepted: 07/10/2015] [Indexed: 12/22/2022]
Abstract
The hypothalamus is critical to the coordination of energy balance and glucose homeostasis. It responds to peripheral factors, such as insulin and leptin, that convey to the brain the degree of adiposity and the metabolic status of the organism. The development of leptin and insulin resistance in hypothalamic neurons appears to have a key role in the exacerbation of diet-induced obesity. In rodents, this has been attributed partly to the increased expression of the tyrosine phosphatases Protein Tyrosine Phosphatase 1B (PTP1B) and T cell protein tyrosine phosphatase (TCPTP), which attenuate leptin and insulin signaling. Deficiencies in PTP1B and TCPTP in the brain, or specific neurons, promote insulin and leptin signaling and prevent diet-induced obesity, type 2 diabetes mellitus (T2DM), and fatty liver disease. Although targeting phosphatases and hypothalamic circuits remains challenging, recent advances indicate that such hurdles might be overcome. Here, we focus on the roles of PTP1B and TCPTP in insulin and leptin signaling and explore their potential as therapeutic targets.
Collapse
Affiliation(s)
- Zhong-Yin Zhang
- Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, IN, 46202-5126, USA
| | - Garron T Dodd
- Department of Biochemistry and Molecular Biology, Monash University, VIC 3800, Australia
| | - Tony Tiganis
- Department of Biochemistry and Molecular Biology, Monash University, VIC 3800, Australia.
| |
Collapse
|
188
|
A conserved motif in JNK/p38-specific MAPK phosphatases as a determinant for JNK1 recognition and inactivation. Nat Commun 2016; 7:10879. [PMID: 26988444 PMCID: PMC4802042 DOI: 10.1038/ncomms10879] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2015] [Accepted: 01/28/2016] [Indexed: 02/06/2023] Open
Abstract
Mitogen-activated protein kinases (MAPKs), important in a large array of signalling pathways, are tightly controlled by a cascade of protein kinases and by MAPK phosphatases (MKPs). MAPK signalling efficiency and specificity is modulated by protein–protein interactions between individual MAPKs and the docking motifs in cognate binding partners. Two types of docking interactions have been identified: D-motif-mediated interaction and FXF-docking interaction. Here we report the crystal structure of JNK1 bound to the catalytic domain of MKP7 at 2.4-Å resolution, providing high-resolution structural insight into the FXF-docking interaction. The 285FNFL288 segment in MKP7 directly binds to a hydrophobic site on JNK1 that is near the MAPK insertion and helix αG. Biochemical studies further reveal that this highly conserved structural motif is present in all members of the MKP family, and the interaction mode is universal and critical for the MKP-MAPK recognition and biological function. The important MAPK family of signalling proteins is controlled by MAPK phosphatases (MKPs). Here, the authors report the structure of MKP7 bound to JNK1 and characterise the conserved MKP-MAPK interaction.
Collapse
|
189
|
Li X, Köhn M. Prediction and verification of novel peptide targets of protein tyrosine phosphatase 1B. Bioorg Med Chem 2016; 24:3255-8. [PMID: 27025565 PMCID: PMC4957924 DOI: 10.1016/j.bmc.2016.03.030] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Revised: 03/14/2016] [Accepted: 03/16/2016] [Indexed: 11/26/2022]
Abstract
Phosphotyrosine peptides are useful starting points for inhibitor design and for the search for protein tyrosine phosphatase (PTP) phosphoprotein substrates. To identify novel phosphopeptide substrates of PTP1B, we developed a computational prediction protocol based on a virtual library of protein sequences with known phosphotyrosine sites. To these we applied sequence-based methods, biologically meaningful filters and molecular docking. Five peptides were selected for biochemical testing of their potential as PTP1B substrates. All five peptides were equally good substrates for PTP1B compared to a known peptide substrate whereas appropriate control peptides were not recognized, showing that our protocol can be used to identify novel peptide substrates of PTP1B.
Collapse
Affiliation(s)
- Xun Li
- European Molecular Biology Laboratory, Genome Biology Unit, Meyerhofstrasse 1, 69117 Heidelberg, Germany; European Molecular Biology Laboratory-European Bioinformatics Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge CB10 1SD, United Kingdom
| | - Maja Köhn
- European Molecular Biology Laboratory, Genome Biology Unit, Meyerhofstrasse 1, 69117 Heidelberg, Germany.
| |
Collapse
|
190
|
G9a-mediated methylation of ERα links the PHF20/MOF histone acetyltransferase complex to hormonal gene expression. Nat Commun 2016; 7:10810. [PMID: 26960573 PMCID: PMC4792926 DOI: 10.1038/ncomms10810] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Accepted: 01/24/2016] [Indexed: 12/19/2022] Open
Abstract
The euchromatin histone methyltransferase 2 (also known as G9a) methylates histone H3K9 to repress gene expression, but it also acts as a coactivator for some nuclear receptors. The molecular mechanisms underlying this activation remain elusive. Here we show that G9a functions as a coactivator of the endogenous oestrogen receptor α (ERα) in breast cancer cells in a histone methylation-independent manner. G9a dimethylates ERα at K235 both in vitro and in cells. Dimethylation of ERαK235 is recognized by the Tudor domain of PHF20, which recruits the MOF histone acetyltransferase (HAT) complex to ERα target gene promoters to deposit histone H4K16 acetylation promoting active transcription. Together, our data suggest the molecular mechanism by which G9a functions as an ERα coactivator. Along with the PHF20/MOF complex, G9a links the crosstalk between ERα methylation and histone acetylation that governs the epigenetic regulation of hormonal gene expression. The histone methyltransferase G9a methylates histone H3K9 to repress gene expression, but it also acts as a coactivator for some nuclear receptors. Here, Zhang et al. show that methylation of ERα by G9a recruits the PHF20/MOF complex that deposits histone H4K16 acetylation promoting active transcription.
Collapse
|
191
|
Fu LL, Tian M, Li X, Li JJ, Huang J, Ouyang L, Zhang Y, Liu B. Inhibition of BET bromodomains as a therapeutic strategy for cancer drug discovery. Oncotarget 2016; 6:5501-16. [PMID: 25849938 PMCID: PMC4467383 DOI: 10.18632/oncotarget.3551] [Citation(s) in RCA: 184] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Accepted: 02/13/2015] [Indexed: 02/05/2023] Open
Abstract
As a conserved protein interaction module that recognizes and binds to acetylated lysine, bromodomain (BRD) contains a deep, largely hydrophobic acetyl lysine binding site. Proteins that share the feature of containing two BRDs and an extra-terminal domain belong to BET family, including BRD2, BRD3, BRD4 and BRDT. BET family proteins perform transcription regulatory function under normal conditions, while in cancer, they regulate transcription of several oncogenes, such as c-Myc and Bcl-2. Thus, targeting BET proteins may be a promising strategy, and intense interest of BET proteins has fueled the development of structure-based bromodomain inhibitors in cancer. In this review, we focus on summarizing several small-molecule BET inhibitors and their relevant anti-tumor mechanisms, which would provide a clue for exploiting new targeted BET inhibitors in the future cancer therapy.
Collapse
Affiliation(s)
- Lei-lei Fu
- State Key Laboratory of Biotherapy, Collaborative Innovation Center of Biotherapy, Department of Urology, West China Hospital, Sichuan University, Chengdu, China
| | - Mao Tian
- State Key Laboratory of Biotherapy, Collaborative Innovation Center of Biotherapy, Department of Urology, West China Hospital, Sichuan University, Chengdu, China
| | - Xiang Li
- State Key Laboratory of Biotherapy, Collaborative Innovation Center of Biotherapy, Department of Urology, West China Hospital, Sichuan University, Chengdu, China
| | - Jing-jing Li
- State Key Laboratory of Biotherapy, Collaborative Innovation Center of Biotherapy, Department of Urology, West China Hospital, Sichuan University, Chengdu, China
| | - Jian Huang
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, China
| | - Liang Ouyang
- State Key Laboratory of Biotherapy, Collaborative Innovation Center of Biotherapy, Department of Urology, West China Hospital, Sichuan University, Chengdu, China
| | - Yonghui Zhang
- State Key Laboratory of Biotherapy, Collaborative Innovation Center of Biotherapy, Department of Urology, West China Hospital, Sichuan University, Chengdu, China.,Collaborative Innovation Center for Biotherapy, Department of Pharmacology & Pharmaceutical Sciences, School of Medicine, Tsinghua University, Beijing, China
| | - Bo Liu
- State Key Laboratory of Biotherapy, Collaborative Innovation Center of Biotherapy, Department of Urology, West China Hospital, Sichuan University, Chengdu, China
| |
Collapse
|
192
|
Zhou Y, Skelton LA, Xu L, Chandler MP, Berthiaume JM, Boron WF. Role of Receptor Protein Tyrosine Phosphatase γ in Sensing Extracellular CO2 and HCO3. J Am Soc Nephrol 2016; 27:2616-21. [PMID: 26839367 DOI: 10.1681/asn.2015040439] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Accepted: 12/17/2015] [Indexed: 01/06/2023] Open
Abstract
Regulation of blood pH-critical for virtually every facet of life-requires that the renal proximal tubule (PT) adjust its rate of H(+) secretion (nearly the same as the rate of HCO3 (-) reabsorption, JHCO3 ) in response to changes in blood [CO2] and [HCO3 (-)]. Yet CO2/HCO3 (-) sensing mechanisms remain poorly characterized. Because receptor tyrosine kinase inhibitors render JHCO3 in the PT insensitive to changes in CO2 concentration, we hypothesized that the structural features of receptor protein tyrosine phosphatase-γ (RPTPγ) that are consistent with binding of extracellular CO2 or HCO3 (-) facilitate monitoring of blood CO2/HCO3 (-) concentrations. We now report that PTs express RPTPγ on blood-facing membranes. Moreover, RPTPγ deletion in mice eliminated the CO2 and HCO3 (-) sensitivities of JHCO3 as well as the normal defense of blood pH during whole-body acidosis. Thus, RPTPγ appears to be a novel extracellular CO2/HCO3 (-) sensor critical for pH homeostasis.
Collapse
Affiliation(s)
- Yuehan Zhou
- Department of Physiology and Biophysics, Case Western Reserve University School of Medicine, Cleveland, Ohio
| | - Lara A Skelton
- Department of Physiology and Biophysics, Case Western Reserve University School of Medicine, Cleveland, Ohio
| | - Lumei Xu
- Department of Physiology and Biophysics, Case Western Reserve University School of Medicine, Cleveland, Ohio
| | - Margaret P Chandler
- Department of Physiology and Biophysics, Case Western Reserve University School of Medicine, Cleveland, Ohio
| | - Jessica M Berthiaume
- Department of Physiology and Biophysics, Case Western Reserve University School of Medicine, Cleveland, Ohio
| | - Walter F Boron
- Department of Physiology and Biophysics, Case Western Reserve University School of Medicine, Cleveland, Ohio
| |
Collapse
|
193
|
Fan LC, Teng HW, Shiau CW, Lin H, Hung MH, Chen YL, Huang JW, Tai WT, Yu HC, Chen KF. SHP-1 is a target of regorafenib in colorectal cancer. Oncotarget 2015; 5:6243-51. [PMID: 25071018 PMCID: PMC4171626 DOI: 10.18632/oncotarget.2191] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Regorafenib is an inhibitor of multiple protein kinases which exerts antitumor and antimetastatic activities in metastatic colorectal cancer (CRC). SH2 domain-containing phosphatase 1 (SHP-1) is reported to have tumor suppressive potential because it acts as a negative regulator of p-STAT3Tyr705 signaling. However, little is known about the mechanism regarding regorafenib affects SHP-1 tyrosine phosphatase activity and leads to apoptosis and tumor suppression in CRC. Here, we found that regorafenib triggered apoptotic cell death and significantly enhanced SHP-1 activity, which dramatically decreased the phosphorylated form of STAT3 at Tyr705 (p-STAT3Tyr705). Importantly, regorafenib augmented SHP-1 activity by direct disruption of the association between N-SH2 and catalytic PTP domain of SHP-1. Deletion of the N-SH2 domain (dN1) or point mutation (D61A) of SHP-1 blocked the effect of regorafenib-induced SHP-1 activity, growth inhibition and a decrease of p-STAT3Tyr705 expression, suggesting that regorafenib triggers a conformational change in SHP-1 by relieving its autoinhibition. In vivo assay showed that regorafenib significantly inhibited xenograft growth and decreased p-STAT3Tyr705 expression but induced higher SHP-1 activity. Collectively, regorafenib is a novel SHP-1 agonist exerts superior anti-tumor effects by enhancing SHP-1 activity that directly targets p-STAT3Tyr705. Small molecule-enhancement of SHP-1 activity may be a promising therapeutic approach for CRC treatment.
Collapse
Affiliation(s)
- Li-Ching Fan
- Department of Medical Research, National Taiwan University Hospital, Taipei, Taiwan; National Center of Excellence for Clinical Trial and Research, National Taiwan University Hospital, Taipei, Taiwan; These authors contributed equally to this work
| | - Hao-Wei Teng
- Division of Hematology and Oncology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan; National Yang-Ming University School of Medicine, Taipei, Taiwan; These authors contributed equally to this work
| | - Chung-Wai Shiau
- Institute of Biopharmaceutical Sciences, National Yang-Ming University, Taipei, Taiwan; These authors contributed equally to this work
| | - Hang Lin
- Department of Medical Research, National Taiwan University Hospital, Taipei, Taiwan; National Center of Excellence for Clinical Trial and Research, National Taiwan University Hospital, Taipei, Taiwan
| | - Man-Hsin Hung
- Division of Hematology and Oncology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan; Program in Molecular Medicine, School of Life Sciences, National Yang-Ming University, Taipei, Taiwan
| | - Yen-Lin Chen
- Department of Pathology, Cardinal Tien Hospital, School of Medicine, Fu-Jen Catholic University, New Taipei, Taiwan
| | - Jui-Wen Huang
- Industrial Technology Research Institute, Hsin-Chu, Taiwan
| | - Wei-Tien Tai
- Department of Medical Research, National Taiwan University Hospital, Taipei, Taiwan; National Center of Excellence for Clinical Trial and Research, National Taiwan University Hospital, Taipei, Taiwan
| | - Hui-Chuan Yu
- Department of Medical Research, National Taiwan University Hospital, Taipei, Taiwan; National Center of Excellence for Clinical Trial and Research, National Taiwan University Hospital, Taipei, Taiwan
| | - Kuen-Feng Chen
- Department of Medical Research, National Taiwan University Hospital, Taipei, Taiwan; National Center of Excellence for Clinical Trial and Research, National Taiwan University Hospital, Taipei, Taiwan
| |
Collapse
|
194
|
Alonso A, Pulido R. The extended human PTPome: a growing tyrosine phosphatase family. FEBS J 2015; 283:1404-29. [PMID: 26573778 DOI: 10.1111/febs.13600] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Revised: 10/02/2015] [Accepted: 11/13/2015] [Indexed: 12/13/2022]
Abstract
Tyr phosphatases are, by definition, enzymes that dephosphorylate phospho-Tyr (pTyr) from proteins. This activity is found in several structurally diverse protein families, including the protein Tyr phosphatase (PTP), arsenate reductase, rhodanese, haloacid dehalogenase (HAD) and His phosphatase (HP) families. Most of these families include members with substrate specificity for non-pTyr substrates, such as phospho-Ser/phospho-Thr, phosphoinositides, phosphorylated carbohydrates, mRNAs, or inorganic moieties. A Cys is essential for catalysis in PTPs, rhodanese and arsenate reductase enzymes, whereas this work is performed by an Asp in HAD phosphatases and by a His in HPs, via a catalytic mechanism shared by all of the different families. The category that contains most Tyr phosphatases is the PTP family, which, although it received its name from this activity, includes Ser, Thr, inositide, carbohydrate and RNA phosphatases, as well as some inactive pseudophosphatase proteins. Here, we propose an extended collection of human Tyr phosphatases, which we call the extended human PTPome. The addition of new members (SACs, paladin, INPP4s, TMEM55s, SSU72, and acid phosphatases) to the currently categorized PTP group of enzymes means that the extended human PTPome contains up to 125 proteins, of which ~ 40 are selective for pTyr. We set criteria to ascribe proteins to the extended PTPome, and summarize the more important features of the new PTPome members in the context of their phosphatase activity and their relationship with human disease.
Collapse
Affiliation(s)
- Andrés Alonso
- Instituto de Biología y Genética Molecular (IBGM), CSIC-Universidad de Valladolid, Valladolid, Spain
| | - Rafael Pulido
- Biocruces Health Research Institute, Barakaldo, Spain.,IKERBASQUE, Basque Foundation for Science, Bilbao, Spain
| |
Collapse
|
195
|
César-Razquin A, Snijder B, Frappier-Brinton T, Isserlin R, Gyimesi G, Bai X, Reithmeier RA, Hepworth D, Hediger MA, Edwards AM, Superti-Furga G. A Call for Systematic Research on Solute Carriers. Cell 2015; 162:478-87. [PMID: 26232220 DOI: 10.1016/j.cell.2015.07.022] [Citation(s) in RCA: 392] [Impact Index Per Article: 43.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Indexed: 01/10/2023]
Abstract
Solute carrier (SLC) membrane transport proteins control essential physiological functions, including nutrient uptake, ion transport, and waste removal. SLCs interact with several important drugs, and a quarter of the more than 400 SLC genes are associated with human diseases. Yet, compared to other gene families of similar stature, SLCs are relatively understudied. The time is right for a systematic attack on SLC structure, specificity, and function, taking into account kinship and expression, as well as the dependencies that arise from the common metabolic space.
Collapse
Affiliation(s)
- Adrián César-Razquin
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, 1090 Vienna, Austria
| | - Berend Snijder
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, 1090 Vienna, Austria
| | | | - Ruth Isserlin
- The Donnelly Centre, University of Toronto, Toronto, Ontario, M5S 3E1, Canada
| | - Gergely Gyimesi
- Institute of Biochemistry and Molecular Medicine and Swiss National Center of Competence in Research, NCCR TransCure, University of Bern, 3012 Bern, Switzerland
| | - Xiaoyun Bai
- Department of Biochemistry, University of Toronto, Toronto, Ontario, M5S 1A8 Canada
| | | | - David Hepworth
- Worldwide Medicinal Chemistry, Pfizer Worldwide Research and Development, Cambridge, MA 02139, USA
| | - Matthias A Hediger
- Institute of Biochemistry and Molecular Medicine and Swiss National Center of Competence in Research, NCCR TransCure, University of Bern, 3012 Bern, Switzerland.
| | - Aled M Edwards
- Structural Genomics Consortium, University of Toronto, Toronto, Ontario M5G 1L7, Canada.
| | - Giulio Superti-Furga
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, 1090 Vienna, Austria; Center for Physiology and Pharmacology, Medical University of Vienna, 1090 Vienna, Austria.
| |
Collapse
|
196
|
Kuban-Jankowska A, Gorska M, Jaremko L, Jaremko M, Tuszynski JA, Wozniak M. The physiological concentration of ferrous iron (II) alters the inhibitory effect of hydrogen peroxide on CD45, LAR and PTP1B phosphatases. Biometals 2015; 28:975-86. [PMID: 26407665 PMCID: PMC4635172 DOI: 10.1007/s10534-015-9882-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Accepted: 09/22/2015] [Indexed: 11/27/2022]
Abstract
Hydrogen peroxide is an important regulator of protein tyrosine phosphatase activity via reversible oxidation. However, the role of iron in this reaction has not been yet elucidated. Here we compare the influence of hydrogen peroxide and the ferrous iron (reagent for Fenton reaction) on the enzymatic activity of recombinant CD45, LAR, PTP1B phosphatases and cellular CD45 in Jurkat cells. The obtained results show that ferrous iron (II) is potent inhibitor of CD45, LAR and PTP1B, but the inhibitory effect is concentration dependent. We found that the higher concentrations of ferrous iron (II) increase the inactivation of CD45, LAR and PTP1B phosphatase caused by hydrogen peroxide, but the addition of the physiological concentration (500 nM) of ferrous iron (II) has even a slightly preventive effect on the phosphatase activity against hydrogen peroxide.
Collapse
Affiliation(s)
| | - Magdalena Gorska
- Department of Medical Chemistry, Medical University of Gdansk, Gdansk, Poland
| | - Lukasz Jaremko
- Max Planck Institute for Biophysical Chemistry and German Center for Neurodegenerative Diseases (DZNE), Göttingen, Germany
| | - Mariusz Jaremko
- Department of Medical Chemistry, Medical University of Gdansk, Gdansk, Poland.,Department of NMR-based Structural Biology, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
| | | | - Michal Wozniak
- Department of Medical Chemistry, Medical University of Gdansk, Gdansk, Poland
| |
Collapse
|
197
|
Hou X, Li K, Yu X, Sun JP, Fang H. Protein Flexibility in Docking-Based Virtual Screening: Discovery of Novel Lymphoid-Specific Tyrosine Phosphatase Inhibitors Using Multiple Crystal Structures. J Chem Inf Model 2015; 55:1973-83. [DOI: 10.1021/acs.jcim.5b00344] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Xuben Hou
- Department
of Medicinal Chemistry, Key Laboratory of Chemical Biology
of Natural Products (MOE), School of Pharmacy, ‡Department of Physiology, School
of Medicine, and §Key Laboratory Experimental Teratology of the Ministry of Education
and Department of Biochemistry and Molecular Biology, School of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Kangshuai Li
- Department
of Medicinal Chemistry, Key Laboratory of Chemical Biology
of Natural Products (MOE), School of Pharmacy, ‡Department of Physiology, School
of Medicine, and §Key Laboratory Experimental Teratology of the Ministry of Education
and Department of Biochemistry and Molecular Biology, School of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Xiao Yu
- Department
of Medicinal Chemistry, Key Laboratory of Chemical Biology
of Natural Products (MOE), School of Pharmacy, ‡Department of Physiology, School
of Medicine, and §Key Laboratory Experimental Teratology of the Ministry of Education
and Department of Biochemistry and Molecular Biology, School of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Jin-peng Sun
- Department
of Medicinal Chemistry, Key Laboratory of Chemical Biology
of Natural Products (MOE), School of Pharmacy, ‡Department of Physiology, School
of Medicine, and §Key Laboratory Experimental Teratology of the Ministry of Education
and Department of Biochemistry and Molecular Biology, School of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Hao Fang
- Department
of Medicinal Chemistry, Key Laboratory of Chemical Biology
of Natural Products (MOE), School of Pharmacy, ‡Department of Physiology, School
of Medicine, and §Key Laboratory Experimental Teratology of the Ministry of Education
and Department of Biochemistry and Molecular Biology, School of Medicine, Shandong University, Jinan, Shandong 250012, China
| |
Collapse
|
198
|
Lin WW, Yi Z, Stunz LL, Maine CJ, Sherman LA, Bishop GA. The adaptor protein TRAF3 inhibits interleukin-6 receptor signaling in B cells to limit plasma cell development. Sci Signal 2015; 8:ra88. [PMID: 26329582 DOI: 10.1126/scisignal.aaa5157] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Tumor necrosis factor receptor-associated factor 3 (TRAF3) is an adaptor protein that inhibits signaling by CD40 and by the receptor for B cell-activating factor (BAFF) and negatively regulates homeostatic B cell survival. Loss-of-function mutations in TRAF3 are associated with human B cell malignancies, in particular multiple myeloma. The cytokine interleukin-6 (IL-6) supports the differentiation and survival of normal and neoplastic plasma cells. We found that mice with a deficiency in TRAF3 specifically in B cells (B-Traf3(-/-) mice) had about twice as many plasma cells as did their littermate controls. TRAF3-deficient B cells had enhanced responsiveness to IL-6, and genetic loss of IL-6 in B-Traf3(-/-) mice restored their plasma cell numbers to normal. TRAF3 inhibited IL-6 receptor (IL-6R)-mediated signaling by facilitating the association of PTPN22 (a nonreceptor protein tyrosine phosphatase) with the kinase Janus-activated kinase 1 (Jak1), which in turn blocked phosphorylation of the transcription factor STAT3 (signal transducer and activator of transcription 3). Consistent with these results, the number of plasma cells in the PTPN22-deficient mice was increased compared to that in the wild-type mice. Our findings identify TRAF3 and PTPN22 as inhibitors of IL-6R signaling in B cells and reveal a previously uncharacterized role for TRAF3 in the regulation of plasma cell differentiation.
Collapse
Affiliation(s)
- Wai W Lin
- Graduate Immunology Program, University of Iowa, Iowa City, IA 52242, USA
| | - Zuoan Yi
- Department of Microbiology, University of Iowa, Iowa City, IA 52242, USA
| | - Laura L Stunz
- Department of Microbiology, University of Iowa, Iowa City, IA 52242, USA
| | - Christian J Maine
- Department of Immunology and Microbial Sciences, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Linda A Sherman
- Department of Immunology and Microbial Sciences, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Gail A Bishop
- Graduate Immunology Program, University of Iowa, Iowa City, IA 52242, USA. Department of Microbiology, University of Iowa, Iowa City, IA 52242, USA. Department of Internal Medicine, University of Iowa, Iowa City, IA 52242, USA. Veterans Affairs Medical Center, Iowa City, IA 52246, USA.
| |
Collapse
|
199
|
Seo H, Cho S. PTP Inhibitor V Inhibits Dual-specificity Phosphatase 22 (DUSP22) Activity. B KOREAN CHEM SOC 2015. [DOI: 10.1002/bkcs.10444] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Huiyun Seo
- College of Pharmacy; Chung-Ang University; Seoul 156-756 Republic of Korea
| | - Sayeon Cho
- College of Pharmacy; Chung-Ang University; Seoul 156-756 Republic of Korea
| |
Collapse
|
200
|
Toneto Novaes LF, Martins Avila C, Pelizzaro-Rocha KJ, Vendramini-Costa DB, Pereira Dias M, Barbosa Trivella DB, Ernesto de Carvalho J, Ferreira-Halder CV, Pilli RA. (−)-Tarchonanthuslactone: Design of New Analogues, Evaluation of their Antiproliferative Activity on Cancer Cell Lines, and Preliminary Mechanistic Studies. ChemMedChem 2015; 10:1687-99. [DOI: 10.1002/cmdc.201500246] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Revised: 08/03/2015] [Indexed: 01/24/2023]
|