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Gomez Barroso JA, Miranda MR, Pereira CA, Garratt RC, Aguilar CF. X-ray diffraction and in vivo studies reveal the quinary structure of Trypanosoma cruzi nucleoside diphosphate kinase 1: a novel helical oligomer structure. Acta Crystallogr D Struct Biol 2022; 78:30-42. [PMID: 34981759 DOI: 10.1107/s2059798321011219] [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: 08/03/2021] [Accepted: 10/25/2021] [Indexed: 11/10/2022] Open
Abstract
Trypanosoma cruzi is a flagellated protozoan parasite that causes Chagas disease, which represents a serious health problem in the Americas. Nucleoside diphosphate kinases (NDPKs) are key enzymes that are implicated in cellular energy management. TcNDPK1 is the canonical isoform in the T. cruzi parasite. TcNDPK1 has a cytosolic, perinuclear and nuclear distribution. It is also found in non-membrane-bound filaments adjacent to the nucleus. In the present work, X-ray diffraction and in vivo studies of TcNDPK1 are described. The structure reveals a novel, multi-hexameric, left-handed helical oligomer structure. The results of directed mutagenesis studies led to the conclusion that the microscopic TcNDPK1 granules observed in vivo in T. cruzi parasites are made up by the association of TcNDPK1 oligomers. In the absence of experimental data, analysis of the interactions in the X-ray structure of the TcNDPK1 oligomer suggests the probable assembly and disassembly steps: dimerization, assembly of the hexamer as a trimer of dimers, hexamer association to generate the left-handed helical oligomer structure and finally oligomer association in a parallel manner to form the microscopic TcNDPK1 filaments that are observed in vivo in T. cruzi parasites. Oligomer disassembly takes place on the binding of substrate in the active site of TcNDPK1, leading to dissociation of the hexamers. This study constitutes the first report of such a protein arrangement, which has never previously been seen for any protein or NDPK. Further studies are needed to determine its physiological role. However, it may suggest a paradigm for protein storage reflecting the complex mechanism of action of TcNDPK1.
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Affiliation(s)
- Juan Arturo Gomez Barroso
- Laboratorio de Biología Molecular Estructural, Universidad Nacional de San Luis, Ejército de los Andes 950, 5700 San Luis, Argentina
| | - Mariana Reneé Miranda
- Laboratorio de Parasitología Molecular, Instituto de Investigaciones Médicas (IDIM), Universidad de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas, Ciudad Autónoma de Buenos Aires, Buenos Aires, Argentina
| | - Claudio Alejandro Pereira
- Laboratorio de Parasitología Molecular, Instituto de Investigaciones Médicas (IDIM), Universidad de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas, Ciudad Autónoma de Buenos Aires, Buenos Aires, Argentina
| | - Richard Charles Garratt
- Instituto de Física de São Carlos, Universidade de São Paulo, Avenida Trabalhador São-carlense No. 400, São Carlos, São Paulo 13566-590, Brazil
| | - Carlos Fernando Aguilar
- Laboratorio de Biología Molecular Estructural, Universidad Nacional de San Luis, Ejército de los Andes 950, 5700 San Luis, Argentina
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Li Y, Liu W, Saini V, Wong YH. Mutations at the dimer interface and surface residues of Nm23-H1 metastasis suppressor affect its expression and function. Mol Cell Biochem 2020; 474:95-112. [PMID: 32705629 DOI: 10.1007/s11010-020-03836-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Accepted: 07/11/2020] [Indexed: 11/25/2022]
Abstract
The Nm23 metastasis suppressor family is involved in a variety of physiological and pathological processes including cell proliferation, differentiation, tumorigenesis, and metastasis. Given that Nm23 proteins may function as hexamers composed of different members of the family, especially Nm23-H1 and H2 isoforms, it is pertinent to assess the importance of interface and surface residues in defining the functional characteristics of Nm23 proteins. Using molecular modeling to identify clusters of residues that may affect dimer formation and isoform specificity, mutants of Nm23-H1 were constructed and assayed for their ability to modulate cell migration. Mutations of dimer interface residues Gly22 and Lys39 affected the expression level of Nm23-H1, without altering the transcript level. The reduced protein expression was not due to increased protein degradation or altered subcellular distribution. Substitution of the surface residues of Nm23-H1 with Nm23-H2-specific Ser131 and/or Lys124/135 affected the electrophoretic mobility of the protein. Moreover, in cell migration assays, several mutants with altered surface residues exhibited impaired ability to suppress the mobility of MDA-MB-231 cells. Collectively, the study suggests that disrupting the dimer interface may affect the expression of Nm23-H1, while the residues at α-helix and β-sheet on the surface of Nm23-H1 may contribute to its metastasis suppressive function.
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Affiliation(s)
- Yuanjun Li
- Division of Life Science and the Biotechnology Research Institute, Hong Kong University of Science and Technology, Hong Kong, China.,Eye Center of Xiangya Hospital, Hunan Key Laboratory of Opthalmology, Xiangya Hospital, Central South University, Changsha, China
| | - Wen Liu
- Division of Life Science and the Biotechnology Research Institute, Hong Kong University of Science and Technology, Hong Kong, China
| | - Vasu Saini
- Division of Life Science and the Biotechnology Research Institute, Hong Kong University of Science and Technology, Hong Kong, China
| | - Yung H Wong
- Division of Life Science and the Biotechnology Research Institute, Hong Kong University of Science and Technology, Hong Kong, China. .,State Key Laboratory of Molecular Neuroscience and the Molecular Neuroscience Center, Hong Kong University of Science and Technology, Hong Kong, China.
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3
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Radić M, Šoštar M, Weber I, Ćetković H, Slade N, Herak Bosnar M. The Subcellular Localization and Oligomerization Preferences of NME1/NME2 upon Radiation-Induced DNA Damage. Int J Mol Sci 2020; 21:ijms21072363. [PMID: 32235358 PMCID: PMC7177722 DOI: 10.3390/ijms21072363] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 03/20/2020] [Accepted: 03/26/2020] [Indexed: 02/06/2023] Open
Abstract
Nucleoside diphosphate kinases (NDPK/NME/Nm23) are enzymes composed of subunits NME1/NDPK A and NME2/NDPK B, responsible for the maintenance of the cellular (d)NTP pool and involved in other cellular processes, such as metastasis suppression and DNA damage repair. Although eukaryotic NDPKs are active only as hexamers, it is unclear whether other NME functions require the hexameric form, and how the isoenzyme composition varies in different cellular compartments. To examine the effect of DNA damage on intracellular localization of NME1 and NME2 and the composition of NME oligomers in the nucleus and the cytoplasm, we used live-cell imaging and the FRET/FLIM technique. We showed that exogenous NME1 and NME2 proteins co-localize in the cytoplasm of non-irradiated cells, and move simultaneously to the nucleus after gamma irradiation. The FRET/FLIM experiments imply that, after DNA damage, there is a slight shift in the homomer/heteromer balance between the nucleus and the cytoplasm. Collectively, our results indicate that, after irradiation, NME1 and NME2 engage in mutual functions in the nucleus, possibly performing specific functions in their homomeric states. Finally, we demonstrated that fluorophores fused to the N-termini of NME polypeptides produce the largest FRET effect and thus recommend this orientation for use in similar studies.
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Affiliation(s)
- Martina Radić
- Division of Molecular Medicine, Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia; (M.R.); (N.S.)
| | - Marko Šoštar
- Division of Molecular Biology, Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia; (M.Š.); (I.W.); (H.Ć.)
| | - Igor Weber
- Division of Molecular Biology, Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia; (M.Š.); (I.W.); (H.Ć.)
| | - Helena Ćetković
- Division of Molecular Biology, Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia; (M.Š.); (I.W.); (H.Ć.)
| | - Neda Slade
- Division of Molecular Medicine, Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia; (M.R.); (N.S.)
| | - Maja Herak Bosnar
- Division of Molecular Medicine, Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia; (M.R.); (N.S.)
- Correspondence: ; Tel.: +385-1-456-0996
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Ozretić P, Hanžić N, Proust B, Sabol M, Trnski D, Radić M, Musani V, Ciribilli Y, Milas I, Puljiz Z, Bosnar MH, Levanat S, Slade N. Expression profiles of p53/p73, NME and GLI families in metastatic melanoma tissue and cell lines. Sci Rep 2019; 9:12470. [PMID: 31462745 PMCID: PMC6713730 DOI: 10.1038/s41598-019-48882-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Accepted: 08/01/2019] [Indexed: 02/08/2023] Open
Abstract
Unlike other tumours, TP53 is rarely mutated in melanoma; however, it fails to function as a tumour suppressor. We assume that its functions might be altered through interactions with several families of proteins, including p53/p73, NME and GLI. To elucidate the potential interplay among these families we analysed the expression profiles of aforementioned genes and proteins in a panel of melanoma cell lines, metastatic melanoma specimens and healthy corresponding tissue. Using qPCR a higher level of NME1 gene expression and lower levels of Δ40p53β, ΔNp73, GLI1, GLI2 and PTCH1 were observed in tumour samples compared to healthy tissue. Protein expression of Δ133p53α, Δ160p53α and ΔNp73α isoforms, NME1 and NME2, and N'ΔGLI1, GLI1FL, GLI2ΔN isoforms was elevated in tumour tissue, whereas ∆Np73β was downregulated. The results in melanoma cell lines, in general, support these findings. In addition, we correlated expression profiles with clinical features and outcome. Higher Δ133p53β and p53α mRNA and both GLI1 mRNA and GLI3R protein expression had a negative impact on the overall survival. Shorter overall survival was also connected with lower p53β and NME1 gene expression levels. In conclusion, all examined genes may have implications in melanoma development and functional inactivity of TP53.
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Affiliation(s)
- Petar Ozretić
- Division of Molecular Medicine, Ruđer Bošković Institute, Bijenička cesta 54, HR-10000, Zagreb, Croatia
| | - Nikolina Hanžić
- Division of Molecular Medicine, Ruđer Bošković Institute, Bijenička cesta 54, HR-10000, Zagreb, Croatia
| | - Bastien Proust
- Division of Molecular Medicine, Ruđer Bošković Institute, Bijenička cesta 54, HR-10000, Zagreb, Croatia
| | - Maja Sabol
- Division of Molecular Medicine, Ruđer Bošković Institute, Bijenička cesta 54, HR-10000, Zagreb, Croatia
| | - Diana Trnski
- Division of Molecular Medicine, Ruđer Bošković Institute, Bijenička cesta 54, HR-10000, Zagreb, Croatia
| | - Martina Radić
- Division of Molecular Medicine, Ruđer Bošković Institute, Bijenička cesta 54, HR-10000, Zagreb, Croatia
| | - Vesna Musani
- Division of Molecular Medicine, Ruđer Bošković Institute, Bijenička cesta 54, HR-10000, Zagreb, Croatia
| | - Yari Ciribilli
- Department of Cellular, Computational and Integrative Biology (CIBIO), University of Trento, Via Sommarive 9, Povo (Trento), IT-38123, Italy
| | - Ivan Milas
- Sestre milosrdnice University Hospital Center, Vinogradska cesta 29, HR-10000, Zagreb, Croatia
| | - Zvonimir Puljiz
- Sestre milosrdnice University Hospital Center, Vinogradska cesta 29, HR-10000, Zagreb, Croatia
| | - Maja Herak Bosnar
- Division of Molecular Medicine, Ruđer Bošković Institute, Bijenička cesta 54, HR-10000, Zagreb, Croatia
| | - Sonja Levanat
- Division of Molecular Medicine, Ruđer Bošković Institute, Bijenička cesta 54, HR-10000, Zagreb, Croatia
| | - Neda Slade
- Division of Molecular Medicine, Ruđer Bošković Institute, Bijenička cesta 54, HR-10000, Zagreb, Croatia.
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Liu L, Li M, Zhang C, Zhang J, Li G, Zhang Z, He X, Fan M. Prognostic value and clinicopathologic significance of nm23 in various cancers: A systematic review and meta-analysis. Int J Surg 2018; 60:257-265. [PMID: 30389538 DOI: 10.1016/j.ijsu.2018.10.035] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2018] [Revised: 09/10/2018] [Accepted: 10/23/2018] [Indexed: 01/30/2023]
Abstract
OBJECTIVE Extensive studies have been carried out to investigate the association between nm23 expression and the prognosis and clinicopathologic significance of various tumors. METHODS AND MATERIALS Eligible studies were searched from Embase, China National Knowledge Infrastructure (CNKI), PubMed and Web of Science up to May 2017. In this study, we calculated the pooled hazard ratios (HRs) with 95% confidence intervals (95%CIs) to determine the association between nm23 expression and the prognosis of various tumors. RESULTS A total of 49 studies were finally included in the meta-analysis. The pooled HRs were 2.00 (95% CIs: 1.44-2.78) for overall survival (OS), 1.23 (95% CIs: 1.04-1.46) for disease-specific survival or progression-free survival (DFS/PFS), and 2.21 (95% CIs: 1.38-3.57) for survival of recurrence-free survival or metastasis-free survival (RFS/MFS). Moreover, the results indicated that low nm23 expression was significantly correlated with the lymph node metastasis (P = 0.002). For the subgroup analysis, the expression of nm23 in patients at N0 stage was obviously higher than the patients with breast carcinoma at N1-N3 stage [Odds ratio (OR) = 2.07, 95%CI (1.31, 3.26), P = 0.002]. Moreover, the expression of nm23 in the patients at N0 stage was remarkably higher than those at N1-N3 stages in the Chinese patients with breast carcinoma and those with nasopharyngeal carcinoma (P < 0.05). Whereas, no statistical difference was noticed in the expression of nm23 in patients of various age, gender, T stage, histological degree, TNM stage, respectively (P > 0.05). CONCLUSION Our study suggests that down-regulation of nm23 is related to poor prognosis in many cancers. The expression of nm23 in cancer tissues may serve as an important factor for evaluating the presence of lymph node metastasis.
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Affiliation(s)
- Liang Liu
- Department of Radiation Oncology, Fudan University Shanghai Cancer Center, Shanghai, 200032, PR China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, PR China
| | - Man Li
- Department of Otolaryngology-Head and Neck Surgery, Taihe Hospital, Hubei University of Medicine, Shiyan, Hubei, 442000, PR China
| | - Chengdong Zhang
- School of Life Sciences, Fudan University, Shanghai, 200082, PR China
| | - Junhua Zhang
- Department of Radiation Oncology, Fudan University Shanghai Cancer Center, Shanghai, 200032, PR China
| | - Guoyi Li
- Department of Otolaryngology-Head and Neck Surgery, Taihe Hospital, Hubei University of Medicine, Shiyan, Hubei, 442000, PR China
| | - Zhimin Zhang
- Department of Otolaryngology-Head and Neck Surgery, Taihe Hospital, Hubei University of Medicine, Shiyan, Hubei, 442000, PR China
| | - Xinhong He
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, PR China; Department of Interventional Radiology, Shanghai Cancer Center, Fudan University, 200032, PR China.
| | - Min Fan
- Department of Radiation Oncology, Fudan University Shanghai Cancer Center, Shanghai, 200032, PR China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, PR China.
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Marioni G, Cappellesso R, Ottaviano G, Fasanaro E, Marchese-Ragona R, Favaretto N, Giacomelli L, Guzzardo V, Martini A, Fassina A, Blandamura S. Nuclear nonmetastatic protein 23-H1 expression and epithelial-mesenchymal transition in laryngeal carcinoma: A pilot investigation. Head Neck 2018; 40:2020-2028. [DOI: 10.1002/hed.25188] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2017] [Revised: 01/05/2018] [Accepted: 03/02/2018] [Indexed: 12/22/2022] Open
Affiliation(s)
- Gino Marioni
- Department of Neuroscience DNS, Otolaryngology Section; University of Padova; Padova Italy
| | | | - Giancarlo Ottaviano
- Department of Neuroscience DNS, Otolaryngology Section; University of Padova; Padova Italy
| | - Elena Fasanaro
- Department of Radiotherapy; Veneto Institute of Oncology IOV-IRCCS; Padova Italy
| | | | - Niccolò Favaretto
- Department of Neuroscience DNS, Otolaryngology Section; University of Padova; Padova Italy
| | | | | | - Alessandro Martini
- Department of Neuroscience DNS, Otolaryngology Section; University of Padova; Padova Italy
| | - Ambrogio Fassina
- Department of Medicine DIMED; University of Padova; Padova Italy
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Filić V, Marinović M, Šoštar M, Weber I. Modulation of small GTPase activity by NME proteins. J Transl Med 2018; 98:589-601. [PMID: 29434248 DOI: 10.1038/s41374-018-0023-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2017] [Revised: 12/06/2017] [Accepted: 12/29/2017] [Indexed: 12/26/2022] Open
Abstract
NME proteins are reported to influence signal transduction activity of small GTPases from the Ras superfamily by diverse mechanisms in addition to their generic NDP kinase activity, which replenishes the cytoplasmic pool of GTP. Comprehensive evidence shows that NME proteins modulate the activity of Ras GTPases, in particular members of the Rho family, via binding to their major activators GEFs. Direct interaction between several NMEs and Ras GTPases were also indicated in vitro and in vivo. These modes of regulation are mainly independent of the NME's kinase activity. NMEs also modulate the Ras-mediated signal transduction by interfering with the formation of a Ras signaling complex at the plasma membrane. In several examples, NMEs were proposed to perform the role of GAP proteins by promoting hydrolysis of the bound GTP, but this activity still requires additional verification. Early suggestions that NMEs can activate small GTPases by direct phosphorylation of the bound GDP, or by high-rate loading of GTP onto a closely apposed GTPase, were largely dismissed. In this review article, we survey and put into perspective published examples of identified and hypothetical mechanisms of Ras signaling modulation by NME proteins. We also point out involvement of NMEs in the transcriptional regulation of components of Ras GTPases-mediated signal transduction pathways, and reciprocal regulation of NME function by small GTPases, particularly related to NME's binding to membranes.
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Affiliation(s)
- Vedrana Filić
- Ruđer Bošković Institute, Division of Molecular Biology, Bijenička 54, HR-10000, Zagreb, Croatia
| | - Maja Marinović
- Ruđer Bošković Institute, Division of Molecular Biology, Bijenička 54, HR-10000, Zagreb, Croatia
| | - Marko Šoštar
- Ruđer Bošković Institute, Division of Molecular Biology, Bijenička 54, HR-10000, Zagreb, Croatia
| | - Igor Weber
- Ruđer Bošković Institute, Division of Molecular Biology, Bijenička 54, HR-10000, Zagreb, Croatia.
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8
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NM23/NDPK proteins in transcription regulatory functions and chromatin modulation: emerging trends. J Transl Med 2018; 98:175-181. [PMID: 29083410 PMCID: PMC5854247 DOI: 10.1038/labinvest.2017.98] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2017] [Revised: 06/23/2017] [Accepted: 06/30/2017] [Indexed: 12/12/2022] Open
Abstract
NM23/NDPK proteins have been studied for their metastasis suppressor role but the molecular pathways involved in this process are not very vivid. Nucleotide binding and kinase activities of NM23 proteins implicated in anti-metastatic effects have been widely studied. In addition to these, transcriptional regulation adds another arm to the versatility of NM23 proteins that together with the other functions may contribute to better understanding of underlying mechanisms. In this review we discuss emerging reports describing the role of NM23 proteins in gene regulation and chromatin modulation in association with other factors or on their own.
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Panthu B, Ohlmann T, Perrier J, Schlattner U, Jalinot P, Elena-Herrmann B, Rautureau GJP. Cell-Free Protein Synthesis Enhancement from Real-Time NMR Metabolite Kinetics: Redirecting Energy Fluxes in Hybrid RRL Systems. ACS Synth Biol 2018; 7:218-226. [PMID: 28915016 DOI: 10.1021/acssynbio.7b00280] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
A counterintuitive cell-free protein synthesis (CFPS) strategy, based on reducing the ribosomal fraction in rabbit reticulocyte lysate (RRL), triggers the development of hybrid systems composed of RRL ribosome-free supernatant complemented with ribosomes from different mammalian cell-types. Hybrid RRL systems maintain translational properties of the original ribosome cell types, and deliver protein expression levels similar to RRL. Here, we show that persistent ribosome-associated metabolic activity consuming ATP is a major obstacle for maximal protein yield. We provide a detailed picture of hybrid CFPS systems energetic metabolism based on real-time nuclear magnetic resonance (NMR) investigation of metabolites kinetics. We demonstrate that protein synthesis capacity has an upper limit at native ribosome concentration and that lower amounts of the ribosomal fraction optimize energy fluxes toward protein translation, consequently increasing CFPS yield. These results provide a rationalized strategy for further mammalian CFPS developments and reveal the potential of real-time NMR metabolism phenotyping for optimization of cell-free protein expression systems.
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Affiliation(s)
- Baptiste Panthu
- Univ. Lyon, ENS de Lyon, Univ. Claude Bernard, CNRS UMR 5239, INSERM U1210, Laboratory of Biology and Modelling of the Cell, 46 allée d’Italie Site Jacques Monod, F-69007 Lyon, France
| | - Théophile Ohlmann
- CIRI, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, Univ. Lyon, F-69007 Lyon, France
| | - Johan Perrier
- Univ. Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, Institut des Sciences Analytiques, UMR 5280, 5 rue de la Doua, F-69100 Villeurbanne, France
| | - Uwe Schlattner
- Univ. Grenoble Alpes, Laboratory of Fundamental and Applied Bioenergetics (LBFA), 38058 Grenoble cedex, France
| | - Pierre Jalinot
- Univ. Lyon, ENS de Lyon, Univ. Claude Bernard, CNRS UMR 5239, INSERM U1210, Laboratory of Biology and Modelling of the Cell, 46 allée d’Italie Site Jacques Monod, F-69007 Lyon, France
| | - Bénédicte Elena-Herrmann
- Univ. Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, Institut des Sciences Analytiques, UMR 5280, 5 rue de la Doua, F-69100 Villeurbanne, France
| | - Gilles J. P. Rautureau
- Univ. Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, Institut des Sciences Analytiques, UMR 5280, 5 rue de la Doua, F-69100 Villeurbanne, France
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10
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Luzarowski M, Kosmacz M, Sokolowska E, Jasińska W, Willmitzer L, Veyel D, Skirycz A. Affinity purification with metabolomic and proteomic analysis unravels diverse roles of nucleoside diphosphate kinases. JOURNAL OF EXPERIMENTAL BOTANY 2017; 68:3487-3499. [PMID: 28586477 PMCID: PMC5853561 DOI: 10.1093/jxb/erx183] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Accepted: 05/04/2017] [Indexed: 05/22/2023]
Abstract
Interactions between metabolites and proteins play an integral role in all cellular functions. Here we describe an affinity purification (AP) approach in combination with LC/MS-based metabolomics and proteomics that allows, to our knowledge for the first time, analysis of protein-metabolite and protein-protein interactions simultaneously in plant systems. More specifically, we examined protein and small-molecule partners of the three (of five) nucleoside diphosphate kinases present in the Arabidopsis genome (NDPK1-NDPK3). The bona fide role of NDPKs is the exchange of terminal phosphate groups between nucleoside diphosphates (NDPs) and triphosphates (NTPs). However, other functions have been reported, which probably depend on both the proteins and small molecules specifically interacting with the NDPK. Using our approach we identified 23, 17, and 8 novel protein partners of NDPK1, NDPK2, and NDPK3, respectively, with nucleotide-dependent proteins such as actin and adenosine kinase 2 being enriched. Particularly interesting, however, was the co-elution of glutathione S-transferases (GSTs) and reduced glutathione (GSH) with the affinity-purified NDPK1 complexes. Following up on this finding, we could demonstrate that NDPK1 undergoes glutathionylation, opening a new paradigm of NDPK regulation in plants. The described results extend our knowledge of NDPKs, the key enzymes regulating NDP/NTP homeostasis.
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Affiliation(s)
- Marcin Luzarowski
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg, Potsdam-Golm, Germany
| | - Monika Kosmacz
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg, Potsdam-Golm, Germany
| | - Ewelina Sokolowska
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg, Potsdam-Golm, Germany
| | - Weronika Jasińska
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg, Potsdam-Golm, Germany
| | - Lothar Willmitzer
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg, Potsdam-Golm, Germany
| | - Daniel Veyel
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg, Potsdam-Golm, Germany
| | - Aleksandra Skirycz
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg, Potsdam-Golm, Germany
- Correspondence:
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Sjuvarsson E, Marquez VE, Eriksson S. Selective Phosphorylation of South and North-Cytidine and Adenosine Methanocarba-Nucleosides by Human Nucleoside and Nucleotide Kinases Correlates with Their Growth Inhibitory Effects on Cultured Cells. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2016; 34:544-64. [PMID: 26167664 DOI: 10.1080/15257770.2015.1031248] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Here bicyclo[3.1.0]hexane locked deoxycytidine (S-MCdC, N-MCdC), and deoxyadenosine analogs (S-MCdA and N-MCdA) were examined as substrates for purified preparations of human deoxynucleoside kinases: dCK, dGK, TK2, TK1, the ribonucleoside kinase UCK2, two NMP kinases (CMPK1, TMPK) and a NDP kinase. dCK can be important for the first step of phosphorylation of S-MCdC in cells, but S-MCdCMP was not a substrate for CMPK1, TMPK, or NDPK. dCK and dGK had a preference for the S-MCdA whereas N-MCdA was not a substrate for dCK, TK1, UCK2, TK2, dGK nucleoside kinases. The cell growth experiments suggested that N-MCdC and S-MCdA could be activated in cells by cellular kinases so that a triphosphate metabolite was formed. List of abbreviations: ddC, 2', 3'-didioxycytosine, Zalcitabine; 3TC, β-L-(-)-2',3'-dideoxy-3'-thiacytidine, Lamivudine; CdA, 2-cloro-2'-deoxyadenosine, Cladribine; AraA, 9-β-D-arabinofuranosyladenine; hCNT 1-3, human Concentrative Nucleoside Transporter type 1, 2 and 3; hENT 1-4, human Equilibrative Nucleoside Transporter type 1, 2, 3, and 4.
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Affiliation(s)
- Elena Sjuvarsson
- a Department of Anatomy, Physiology, and Biochemistry, Swedish University of Agricultural Sciences , VHC , Uppsala , Sweden
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Role of Interaction and Nucleoside Diphosphate Kinase B in Regulation of the Cystic Fibrosis Transmembrane Conductance Regulator Function by cAMP-Dependent Protein Kinase A. PLoS One 2016; 11:e0149097. [PMID: 26950439 PMCID: PMC4780765 DOI: 10.1371/journal.pone.0149097] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Accepted: 01/27/2016] [Indexed: 02/05/2023] Open
Abstract
Cystic fibrosis results from mutations in the cystic fibrosis transmembrane conductance regulator (CFTR), a cAMP-dependent protein kinase A (PKA) and ATP-regulated chloride channel. Here, we demonstrate that nucleoside diphosphate kinase B (NDPK-B, NM23-H2) forms a functional complex with CFTR. In airway epithelia forskolin/IBMX significantly increases NDPK-B co-localisation with CFTR whereas PKA inhibitors attenuate complex formation. Furthermore, an NDPK-B derived peptide (but not its NDPK-A equivalent) disrupts the NDPK-B/CFTR complex in vitro (19-mers comprising amino acids 36–54 from NDPK-B or NDPK-A). Overlay (Far-Western) and Surface Plasmon Resonance (SPR) analysis both demonstrate that NDPK-B binds CFTR within its first nucleotide binding domain (NBD1, CFTR amino acids 351–727). Analysis of chloride currents reflective of CFTR or outwardly rectifying chloride channels (ORCC, DIDS-sensitive) showed that the 19-mer NDPK-B peptide (but not its NDPK-A equivalent) reduced both chloride conductances. Additionally, the NDPK-B (but not NDPK-A) peptide also attenuated acetylcholine-induced intestinal short circuit currents. In silico analysis of the NBD1/NDPK-B complex reveals an extended interaction surface between the two proteins. This binding zone is also target of the 19-mer NDPK-B peptide, thus confirming its capability to disrupt NDPK-B/CFTR complex. We propose that NDPK-B forms part of the complex that controls chloride currents in epithelia.
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Marioni G, Ottaviano G, Lionello M, Fasanaro E, Staffieri C, Giacomelli L, Gattazzo S, Staffieri A, Blandamura S. A panel of biomarkers for predicting response to postoperative RT for laryngeal cancer? Am J Otolaryngol 2014; 35:771-8. [PMID: 25064017 DOI: 10.1016/j.amjoto.2014.06.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Accepted: 06/10/2014] [Indexed: 12/11/2022]
Abstract
OBJECTIVES Postoperative radiotherapy (PORT) improves locoregional control and survival rates for patients with advanced laryngeal carcinoma (LSCC), but reported outcomes after PORT for LSCC vary considerably. Predictive markers (including biomarkers) are needed for LSCC to orient the choice of the most appropriate adjuvant therapy for individual patients. The aim of this study was to identify a panel of LSCC tissue markers (considering EGFR, mTOR, survivin, Bcl-2, angiogenin, endoglin [CD105], nm23-H1) capable of pinpointing patients at higher risk of recurrence among 33 LSCC cases treated with PORT. METHODS/RESULTS Univariate analysis found 4 biomarkers (mTOR, nuclear survivin, CD105, non-nuclear nm23-H1) significantly associated with LSCC recurrence. A collinearity emerged between mTOR and CD105 expressions. The predictive role of two different panels (panel 1: mTOR, nuclear survivin, non-nuclear nm23-H1; panel 2: CD105, nuclear survivin, non-nuclear nm23-H1) was considered. According to the Hosmer and Lemeshow scale, panel 1 demonstrated an outstanding discriminatory power (AUC 0.903) in predicting LSCC recurrence after PORT. Panel 2 had an excellent discriminatory power too (AUC 0.899). CONCLUSIONS Both panels of biomarkers showed an important discriminatory power in pinpointing patients at higher risk of recurrence after PORT for LSCC who could reasonably benefit from adjuvant postoperative chemo-RT.
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Peng B, Lei N, Chai Y, Chan EKL, Zhang JY. CIP2A regulates cancer metabolism and CREB phosphorylation in non-small cell lung cancer. MOLECULAR BIOSYSTEMS 2014; 11:105-14. [PMID: 25325377 DOI: 10.1039/c4mb00513a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The cancerous inhibitor of protein phosphatase 2A (CIP2A) is a recently characterized endogenous inhibitor of the phosphatase activity of protein phosphatase 2A (PP2A), which extends the half-life of oncogenic protein c-myc and promotes in vivo tumor growth. The function of CIP2A in cancer progression is still poorly understood. To uncover the underlying mechanism of CIP2A-mediated cell proliferation, we implemented a two-dimensional electrophoresis (2DE)-based proteomic approach to examine lung cancer cell H1299 with and without CIP2A. We found 47 proteins differentially expressed where 19 proteins were upregulated and 28 proteins were downregulated. These were categorized into functional groups such as metabolism (25%), transcriptional and translational control (23%), and the signaling pathway and protein degradation (20%). On one hand, we validate our proteomic work by measuring the metabolic change. The knockdown of CIP2A decreased the expression of LDH-A as well as the enzymatic activity, accompanying with a decreased lactate production, an increased NADH/NAD+ ratio and ROS production. On the other hand, we found that CIP2A may regulate CREB activity through bioinformatics analysis. Our following experiments showed that, CIP2A positively regulated the phosphorylation of CREB in response to the serum treatment. Therefore, our proteomic study suggested that CIP2A mediates cancer progression through the metabolic pathway and intracellular signaling cascade.
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Affiliation(s)
- Bo Peng
- Border Biomedical Research Center & Department of Biological Sciences, The University of Texas at El Paso, El Paso, Texas 79968, USA.
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Francois-Moutal L, Marcillat O, Granjon T. Structural comparison of highly similar nucleoside-diphosphate kinases: Molecular explanation of distinct membrane-binding behavior. Biochimie 2014; 105:110-8. [DOI: 10.1016/j.biochi.2014.06.025] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2013] [Accepted: 06/30/2014] [Indexed: 02/06/2023]
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Dorion S, Rivoal J. Clues to the functions of plant NDPK isoforms. Naunyn Schmiedebergs Arch Pharmacol 2014; 388:119-32. [PMID: 24964975 DOI: 10.1007/s00210-014-1009-x] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2014] [Accepted: 06/15/2014] [Indexed: 12/20/2022]
Abstract
This review describes the five nucleoside diphosphate kinase (NDPK) genes found in both model plants Arabidopsis thaliana (thale cress) and Oryza sativa L. (rice). Phylogenetic and sequence analyses of these genes allow the definition of four types of NDPK isoforms with different predicted subcellular localization. These predictions are supported by experimental evidence for most NDPK types. Data mining also provides evidence for the existence of a novel NDPK type putatively localized in the endoplasmic reticulum. Phylogenic analyses indicate that plant types I, II, and III belong to the previously identified Nme group I whereas type IV belongs to Nme group II. Additional analysis of the literature offers clues supporting the idea that the various plant NDPK types have different functions. Hence, cytosolic type I NDPKs are involved in metabolism, growth, and stress responses. Type II NDPKs are localized in the chloroplast and mainly involved in photosynthetic development and oxidative stress management. Type III NDPKs have dual targeting to the mitochondria and the chloroplast and are principally involved in energy metabolism. The subcellular localization and precise function of the novel type IV NDPKs, however, will require further investigations.
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Affiliation(s)
- Sonia Dorion
- IRBV, Université de Montréal, 4101 rue Sherbrooke est, Montréal, QC, H1X 2B2, Canada
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Pereira CA, Reigada C, Sayé M, Digirolamo FA, Miranda MR. Cytosolic Trypanosoma cruzi nucleoside diphosphate kinase generates large granules that depend on its quaternary structure. Exp Parasitol 2014; 142:43-50. [PMID: 24768953 DOI: 10.1016/j.exppara.2014.04.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2013] [Revised: 03/28/2014] [Accepted: 04/17/2014] [Indexed: 10/25/2022]
Abstract
Nucleoside diphosphate kinase (NDPK) is a key enzyme in the control of cellular concentrations of nucleoside triphosphates, and has been shown to play important roles in many cellular processes. In this work we investigated the subcellular localization of the canonical NDPK1 from Trypanosoma cruzi (TcNDPK1), the etiological agent Chagas's Disease, and evaluated the effect of adding an additional weak protein-protein interaction domain from the green fluorescent protein (GFP). Immunofluorescence microscopy revealed that the enzyme from wild-type and TcNDPK1 overexpressing parasites has a cytosolic distribution, being the signal more intense around the nucleus. However, when TcNDPK1 was fused with dimeric GFP it relocalizes in non-membrane bounded granules also located adjacent to the nucleus. In addition, these granular structures were dependent on the quaternary structure of TcNDPK1 and GFP since mutations in residues involved in their oligomerization dramatically decrease the amount of granules. This phenomenon seems to be specific for TcNDPK1 since other cytosolic hexameric enzyme from T. cruzi, such as the NADP(+)-linked glutamate dehydrogenase, was not affected by the fusion with GFP. In addition, in parasites without GFP fusions granules could be observed in a subpopulation of epimastigotes under metacyclogenesis and metacyclic trypomastigotes. Organization into higher protein arrangements appears to be a singular feature of canonical NDPKs; however the physiological function of such structures requires further investigation.
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Affiliation(s)
- Claudio A Pereira
- Laboratorio de Biología Molecular de Trypanosoma cruzi (LBMTC), Instituto de Investigaciones Médicas Alfredo Lanari, Universidad de Buenos Aires and CONICET, Buenos Aires, Argentina
| | - Chantal Reigada
- Laboratorio de Biología Molecular de Trypanosoma cruzi (LBMTC), Instituto de Investigaciones Médicas Alfredo Lanari, Universidad de Buenos Aires and CONICET, Buenos Aires, Argentina
| | - Melisa Sayé
- Laboratorio de Biología Molecular de Trypanosoma cruzi (LBMTC), Instituto de Investigaciones Médicas Alfredo Lanari, Universidad de Buenos Aires and CONICET, Buenos Aires, Argentina
| | - Fabio A Digirolamo
- Laboratorio de Biología Molecular de Trypanosoma cruzi (LBMTC), Instituto de Investigaciones Médicas Alfredo Lanari, Universidad de Buenos Aires and CONICET, Buenos Aires, Argentina
| | - Mariana R Miranda
- Laboratorio de Biología Molecular de Trypanosoma cruzi (LBMTC), Instituto de Investigaciones Médicas Alfredo Lanari, Universidad de Buenos Aires and CONICET, Buenos Aires, Argentina.
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Lionello M, Blandamura S, Lovato A, Franchella S, Giacomelli L, Ottaviano G, Stellini E, Staffieri A, Marioni G. A high nuclear nm23-H1 expression is associated with a better prognosis in elderly patients with laryngeal carcinoma. Acta Otolaryngol 2013; 133:874-80. [PMID: 23768014 DOI: 10.3109/00016489.2013.777159] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
CONCLUSIONS Nuclear nm23-H1 expression may be useful in identifying elderly patients operated for laryngeal squamous cell carcinoma (LSCC) at higher risk of recurrence. Further studies are needed to clarify the biological role of nm23-H1 in elderly patients with LSCC and to determine how to restore nm23-H1 loss of expression/function. OBJECTIVES Nowadays more than 50% of cancer cases are elderly patients and this percentage is expected to be 70% by 2030. Despite advances in LSCC diagnosis and treatment, patient survival has not improved in the last two decades. Novel, effective strategies should rely also on receptor-mediated LSCC-targeted therapy. nm23-H1 protein is related to the tumor cells' metastatic potential, and low nm23-H1 expression in carcinomas often correlates with a poor prognosis. METHODS Immunohistochemistry and image analysis were used to investigate the prognostic value of nm23-H1 expression and subcellular localization in a series of 54 elderly patients consecutively undergoing primary surgery for LSCC. RESULTS On univariate analysis, the disease recurrence rate correlated inversely with nuclear nm23-H1 expression (p = 0.014), and disease-free survival (DFS) was longer in patients whose nuclear nm23-H1 levels were ≥2.0% (p = 0.022). On multivariate analysis, nuclear nm23-H1 expression (hazard ratio (HR) 2.77, p = 0.022) and N stage (HR 3.49, p = 0.007) were prognostically significant in terms of DFS.
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Affiliation(s)
- Marco Lionello
- Department of Neurosciences, Otolaryngology Section, University of Padova, Padova, Italy
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Marioni G, Ottaviano G, Lionello M, Lora L, Lovato A, Staffieri C, Favaretto N, Giacomelli L, Stellini E, Staffieri A, Blandamura S. Nm23-H1 nuclear expression is associated with a more favourable prognosis in laryngeal carcinoma: univariate and multivariate analysis. Histopathology 2012; 61:1057-64. [PMID: 22978449 DOI: 10.1111/j.1365-2559.2012.04331.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
AIMS To use image analysis and multivariate analysis to investigate the prognostic significance of Nm23-H1 subcellular localization in a large cohort of laryngeal squamous cell carcinomas (LSCCs). METHODS AND RESULTS Nm23-H1 total and nuclear levels were immunohistochemically determined and calculated with an image analysis system in 104 consecutively operated LSCCs. The mean follow-up was 58.3 ± 35.1 months (median 45 months). Total Nm23-H1 levels correlated only with patient stratification by pT (P=0.01). Mean nuclear Nm23-H1 levels were lower in patients with recurrent disease (P=0.01), and disease-free survival (DFS) was longer in patients whose nuclear levels of Nm23-H1 were >2.0% than in those with levels ≤ 2.0% (P=0.019). On multivariate analysis, Nm23-H1 nuclear expression [hazard ratio (HR) 2.59, P=0.005] and N stage (HR 3.60, P=0.0001) were prognostically significant in relation to DFS. CONCLUSIONS In LSCC, Nm23-H1 nuclear expression may be useful for identifying patients at higher risk of recurrence after treatment and who might be considered for more aggressive therapy. Further investigations are needed before Nm23-H1 can be considered for use in targeted treatments for LSCC.
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Affiliation(s)
- Gino Marioni
- Department of Neurosciences, Otolaryngology Section, University of Padova, Padova, Italy.
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Lionello M, Blandamura S, Agostini M, Staffieri C, Lovato A, Tealdo G, Favaretto N, Giacomelli L, Loreggian L, Staffieri A, Marioni G. A prognostic role for Nm23-H1 in laryngeal carcinoma treated with postoperative radiotherapy: an introductory investigation. Eur Arch Otorhinolaryngol 2012; 270:197-203. [DOI: 10.1007/s00405-012-2133-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2012] [Accepted: 07/19/2012] [Indexed: 12/14/2022]
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Bach E, Krahl R, Lange T, Schüler F, Al-Ali H, Büchner T, Haferlach T, Dölken G, Niederwieser D, Cross M. Delayed processing of bone marrow samples reveals a prognostic pattern of NME mRNA expression in cytogenetically normal acute myeloid leukemia. Leuk Lymphoma 2012; 53:1561-8. [PMID: 22421058 DOI: 10.3109/10428194.2012.676176] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Improvements in the therapy of cytogenetically normal acute myeloid leukemia (CN-AML) will depend largely on the characterization of functional subtypes identified by prognostic markers. Exposing leukemic cells to stress ex vivo may reveal relevant phenotypic markers not apparent in freshly explanted cells. Here, we assess the prognostic relevance of expression of the nucleoside diphosphate kinase genes NME1 and NME2 in a cohort of 78 patients with CN-AML aged < 60 years using archived mononuclear cell samples originally prepared from bone marrow either directly (n = 25) or following 2-3 days of transport (n = 53). The stress conditions arising during transport resulted in the development of a prognostic pattern of NME mRNA with maintenance of high NME2 mRNA being a strong indicator of increased event-free survival independent of FLT3-internal tandem duplication. Prospective analysis of CN-AML bone marrow (n = 7) confirmed that NME1 mRNA is always decreased during storage, while NME2 mRNA is either decreased or maintained. We conclude that ex vivo stress can reveal novel prognostic markers.
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Affiliation(s)
- Enrica Bach
- Department of Hematology, Oncology and Hemostasiology, University of Leipzig, Leipzig, Germany
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Filipeanu CM, Guidry JJ, Leonard ST, Winsauer PJ. Δ9-THC increases endogenous AHA1 expression in rat cerebellum and may modulate CB1 receptor function during chronic use. J Neurochem 2011; 118:1101-12. [PMID: 21781118 DOI: 10.1111/j.1471-4159.2011.07391.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
To characterize the long-term effects of adolescent marijuana abuse, we performed a proteomic analysis of cerebellar extracts from adult female rats with and without ovariectomy that were treated with Δ9-THC for 40 days during adolescence. Six proteins were found to significantly differ among the four treatment groups, with Δ9-THC and ovariectomy (OVX) decreasing the mitochondrial proteins, pyruvate carboxylase and NADH dehydrogenase, whereas the levels of putative cytosolic molecular chaperones NM23B, translationally controlled tumor protein, DJ-1 and activator of heat-shock 90kDa protein ATPase homolog 1 (AHA1) were increased. We further analyzed the effects of AHA1, a HSP90 co-chaperone, on CB1R and CB2R trafficking and signaling in transfected HEK293T and Neuro-2A cells. In HEK293T cells, AHA1 over-expression enhanced plasma membrane levels of CB1R and increased CB1R-mediated effects on cAMP levels and on MAPK phosphorylation. AHA1 over-expression also enhanced cell surface levels of endogenous CB1R and the effects of Δ9-THC on the cAMP levels in Neuro-2A cells. In contrast, over-expression of AHA1 did not affect the subcellular localization and signaling of CB2R. Our data indicate that chronic Δ9-THC administration in adolescence altered the endogenous levels of specialized proteins in the cerebellum, such as AHA1, and that this protein can change CB1R cell surface levels and signaling.
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Affiliation(s)
- Catalin M Filipeanu
- Department of Pharmacology and Experimental Therapeutics, Louisiana State University Health Sciences Center, New Orleans, Louisiana, USA.
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Kovacevic Z, Sivagurunathan S, Mangs H, Chikhani S, Zhang D, Richardson DR. The metastasis suppressor, N-myc downstream regulated gene 1 (NDRG1), upregulates p21 via p53-independent mechanisms. Carcinogenesis 2011; 32:732-40. [PMID: 21398495 DOI: 10.1093/carcin/bgr046] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
The metastasis suppressor, N-myc downstream regulated gene-1 (NDRG1), has been shown to markedly reduce metastasis of numerous tumors. The current study was focused on further elucidating the molecular mechanisms behind the antitumor function of NDRG1. We have identified for the first time that NDRG1 upregulates the potent cyclin-dependent kinase inhibitor, p21. This effect was observed in three different cancer cell types, including PC3MM and DU145 prostate cancer cells and H1299 lung carcinoma cells, and occurred independently of p53. In addition, reducing NDRG1 expression using short hairpin RNA in PC3MM and DU145 cells resulted in significantly reduced p21 protein levels. Hence, p21 is closely correlated with NDRG1 expression in these latter cell types. Examining the mechanisms behind the effect of NDRG1 on p21 expression, we found that NDRG1 upregulated p21 via transcriptional and posttranscriptional mechanisms in prostate cancer cells, although its effect on H1299 cells was posttranscriptional only. Further studies identified two additional NDRG1 protein targets. The dominant-negative p63 isoform, ΔNp63, which has been found to inhibit p21 transcription, was downregulated by NDRG1. On the other hand, a truncated 50 kDa MDM2 isoform (p50(MDM2)), which may protect p21 from proteasomal degradation, was upregulated by NDRG1. The downregulation of ΔNp63 and upregulation of p50(MDM2) are potential mechanisms by which NDRG1 increases p21 expression in these cells. Additional functional studies identified that NDRG1 inhibits cancer cell migration, suggesting that p21 is a molecular player in its antimetastatic activity.
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Affiliation(s)
- Zaklina Kovacevic
- Iron Metabolism and Chelation Program, Department of Pathology, Bosch Institute, University of Sydney, New South Wales 2006, Australia
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Kaur N, Hu J. Defining the plant peroxisomal proteome: from Arabidopsis to rice. FRONTIERS IN PLANT SCIENCE 2011; 2:103. [PMID: 22645559 PMCID: PMC3355810 DOI: 10.3389/fpls.2011.00103] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2011] [Accepted: 12/08/2011] [Indexed: 05/08/2023]
Abstract
Peroxisomes are small subcellular organelles mediating a multitude of processes in plants. Proteomics studies over the last several years have yielded much needed information on the composition of plant peroxisomes. In this review, the status of peroxisome proteomics studies in Arabidopsis and other plant species and the cumulative advances made through these studies are summarized. A reference Arabidopsis peroxisome proteome is generated, and some unique aspects of Arabidopsis peroxisomes that were uncovered through proteomics studies and hint at unanticipated peroxisomal functions are also highlighted. Knowledge gained from Arabidopsis was utilized to compile a tentative list of peroxisome proteins for the model monocot plant, rice. Differences in the peroxisomal proteome between these two model plants were drawn, and novel facets in rice were expounded upon. Finally, we discuss about the current limitations of experimental proteomics in decoding the complete and dynamic makeup of peroxisomes, and complementary and integrated approaches that would be beneficial to defining the peroxisomal metabolic and regulatory roadmaps. The synteny of genomes in the grass family makes rice an ideal model to study peroxisomes in cereal crops, in which these organelles have received much less attention, with the ultimate goal to improve crop yield.
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Affiliation(s)
- Navneet Kaur
- MSU-DOE Plant Research Laboratory, Michigan State UniversityEast Lansing, MI, USA
| | - Jianping Hu
- MSU-DOE Plant Research Laboratory, Michigan State UniversityEast Lansing, MI, USA
- Plant Biology Department, Michigan State UniversityEast Lansing, MI, USA
- *Correspondence: Jianping Hu, MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, MI 48824, USA. e-mail:
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Determination of 6-thioguanosine diphosphate and triphosphate and nucleoside diphosphate kinase activity in erythrocytes: novel targets for thiopurine therapy? Ther Drug Monit 2010; 32:119-28. [PMID: 20216118 DOI: 10.1097/ftd.0b013e3181d12f19] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
6-Thioguanine nucleotides are the sum of 6-thioguanosine 5'-monophosphate (TGMP), -diphosphate (TGDP), and -triphosphate (TGTP) representing essential metabolites involved in drug action of thiopurines. Elevated levels of TGDP have been associated with poor response to azathioprine therapy in patients with inflammatory bowel disease. The conversion of TGDP to TGTP is supposed to be catalyzed by nucleoside diphosphate kinase (NDPK). The aim of this work was to investigate simultaneously individual 6-thioguanosine phosphate levels and NDPK activity in red blood cells (RBCs) of patients on azathioprine therapy. Ion-pair high-performance liquid chromatography methods with fluorescence and ultraviolet detection were applied to quantify individual levels of 6-thioguanosine 5'-phosphates and NDPK activity, respectively, in RBCs. Recombinantly expressed NDPK isoforms A and B were unequivocally identified to catalyze the formation of TGTP (30.6 +/- 3.88 nmol x min x mg for NDPK A versus 41.2 +/- 1.05 nmol x min x mg for NDPK B). Comprehensive analyses on the stability of TGMP, TGDP, and TGTP and the reproducibility of NDPK activity in RBCs were performed to provide a reliable sampling protocol for clinical practice. Of note, isolation of RBCs within 6 hours followed by immediate storage at -80 degrees C is crucial for prevention of degradation of 5'-phosphates. In a clinical study of 37 patients on azathioprine, TGTP was the predominant 6-thioguanosine phosphate in RBCs. In contrast, three patients showed TGTP/(TGDP + TGTP) ratios of 57.2%, 64.3%, and 66% corresponding to elevated TGDP levels. NDPK activity ranged from 4.1 to 11.3 nmol x min x mg hemoglobin. No correlation between NDPK activity and the 6-thioguanosine phosphate levels was found. The question whether interindividual variability of NDPK activity may explain differences in 6-thioguanosine 5'-phosphates levels has to be investigated in a prospective large-scale study.
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Purinergic mechanisms in breast cancer support intravasation, extravasation and angiogenesis. Cancer Lett 2010; 291:131-41. [PMID: 19926395 DOI: 10.1016/j.canlet.2009.09.021] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2009] [Revised: 09/25/2009] [Accepted: 09/29/2009] [Indexed: 12/30/2022]
Abstract
Several advances have recently expanded models of tumor growth and promoted the concept of tumor homeostasis, the hypothesis that primary tumors exert an anti-proliferative effect on both themselves and subclinical secondary metastases. Recent trials indicate that the characterization of tumor growth as uncontrolled is inconsistent with animal models, clinical models, and epidemiological models. There is a growing body of evidence which lends support to an updated concept of tumor growth: tumor homeostasis. In the case of breast cancer, if not all metastasizing tumors, these advances suggest an inconvenient truth. That is, if breast tumor cells metastasize to distant sites early in the tumorigenesis process, then removal of a breast tumor may hasten the development of its metastases. We explore the heretofore unappreciated notion that nucleotides generated by tumor cells following the secretion of an ADP-kinase can promote metastasis and support angiogenesis. Evidence is presented that blockade of the actions of nucleotides in the setting of newly diagnosed breast cancer may provide a useful adjunct to current anti-angiogenesis treatment.
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Plakoglobin interacts with and increases the protein levels of metastasis suppressor Nm23-H2 and regulates the expression of Nm23-H1. Oncogene 2010; 29:2118-29. [PMID: 20101217 DOI: 10.1038/onc.2009.495] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Plakoglobin (gamma-catenin) is a homolog of beta-catenin with similar dual adhesive and signaling functions. The adhesive function of these proteins is mediated by their interactions with cadherins, whereas their signaling activity is regulated by association with various intracellular partners. In this respect, beta-catenin has a well-defined oncogenic activity through its role in the Wnt signaling pathway, whereas plakoglobin acts as a tumor/metastasis suppressor through mechanisms that remain unclear. We previously expressed plakoglobin in SCC9 squamous carcinoma cells (SCC9-P) and observed a mesenchymal-to-epidermoid transition. Comparison of the protein and RNA profiles of parental SCC9 cells and SCC9-P transfectants identified various differentially expressed proteins and transcripts, including the nonmetastatic protein 23 (Nm23). In this study, we show that Nm23-H1 mRNA and Nm23-H2 protein are increased after plakoglobin expression. Coimmunoprecipitation and confocal microscopy studies using SCC9-P and various epithelial cell lines with endogenous plakoglobin expression revealed that Nm23 interacts with plakoglobin, cadherins and alpha-catenin. Furthermore, Nm23-H2 is the primary isoform involved in these interactions, which occur prominently in the cytoskeleton-associated pool of cellular proteins. In addition, we show that plakoglobin-Nm23 interaction requires the N-terminal (alpha-catenin interacting) domain of plakoglobin. Our data suggest that by increasing the expression and stability of Nm23, plakoglobin has a role in regulating the metastasis suppressor activity of Nm23, which may further provide a potential mechanism for the tumor/metastasis suppressor function of plakoglobin itself.
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Mehta A, Orchard S. Nucleoside diphosphate kinase (NDPK, NM23, AWD): recent regulatory advances in endocytosis, metastasis, psoriasis, insulin release, fetal erythroid lineage and heart failure; translational medicine exemplified. Mol Cell Biochem 2009; 329:3-15. [PMID: 19415463 PMCID: PMC2721137 DOI: 10.1007/s11010-009-0114-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2009] [Accepted: 04/02/2009] [Indexed: 12/17/2022]
Abstract
The guest editor (AM) provides his perspective on the most recent advances on nucleoside diphosphate kinase (NDPK, otherwise known as AWD or NM23) showcasing phospho-histidine biochemistry and its impact on diverse pathology when disordered. His co-author (SO) provides state-of-the-art analyses from the European institute of Bioinformatics in an appendix to support the most recent advances made by the NDPK community. Unfortunately, to those outside the field, NDPK is often dismissed as a tiny ‘ancient housekeeper’ protein found in marine sponges, social amoebae, worms, fruit flies, rodents and humans but the state-of-the-art papers overviewed here show that NDPK does not act simply in mindless rote, inter-converting cellular ‘energy currencies’. That two NDPK isoforms regulate fetal erythroid lineage is a developmental case in point. Seminal Cancer Research UK support is gratefully acknowledged that generated additional resources to enable the NDPK community to meet in Dundee in 2007 (www.dundee.ac.uk/mchs/ndpk; next meeting is planned: 2010/Mannheim-Heidelberg). The presented papers illustrate the point that when scientists are left alone ‘shut up in the narrow cell of their laboratory’ (as the philosopher Ortega once said, a sentiment echoed by Erwin Schrödinger), then progress will ultimately occur bridging the gap between specialization and translation for human benefit. To aid translation, this overview initially introduces the NDPK family to the non-specialist, who serendipitously finds these proteins in their biology. This is immediately followed by examples of the diverse biology generated by this self-aggregating group of multi-functional proteins and finally capped by an emerging idea explaining how this diversity might arise.
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Affiliation(s)
- Anil Mehta
- Division of Medical Sciences, Tayside Institute of Child Health, Ninewells Hospital Medical School, Dundee DD19SY, Scotland, UK.
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