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Makowska-Grzyska M, Kim Y, Maltseva N, Osipiuk J, Gu M, Zhang M, Mandapati K, Gollapalli DR, Gorla SK, Hedstrom L, Joachimiak A. A novel cofactor-binding mode in bacterial IMP dehydrogenases explains inhibitor selectivity. J Biol Chem 2015; 290:5893-911. [PMID: 25572472 PMCID: PMC4342496 DOI: 10.1074/jbc.m114.619767] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The steadily rising frequency of emerging diseases and antibiotic resistance creates an urgent need for new drugs and targets. Inosine 5'-monophosphate dehydrogenase (IMP dehydrogenase or IMPDH) is a promising target for the development of new antimicrobial agents. IMPDH catalyzes the oxidation of IMP to XMP with the concomitant reduction of NAD(+), which is the pivotal step in the biosynthesis of guanine nucleotides. Potent inhibitors of bacterial IMPDHs have been identified that bind in a structurally distinct pocket that is absent in eukaryotic IMPDHs. The physiological role of this pocket was not understood. Here, we report the structures of complexes with different classes of inhibitors of Bacillus anthracis, Campylobacter jejuni, and Clostridium perfringens IMPDHs. These structures in combination with inhibition studies provide important insights into the interactions that modulate selectivity and potency. We also present two structures of the Vibrio cholerae IMPDH in complex with IMP/NAD(+) and XMP/NAD(+). In both structures, the cofactor assumes a dramatically different conformation than reported previously for eukaryotic IMPDHs and other dehydrogenases, with the major change observed for the position of the NAD(+) adenosine moiety. More importantly, this new NAD(+)-binding site involves the same pocket that is utilized by the inhibitors. Thus, the bacterial IMPDH-specific NAD(+)-binding mode helps to rationalize the conformation adopted by several classes of prokaryotic IMPDH inhibitors. These findings offer a potential strategy for further ligand optimization.
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Affiliation(s)
- Magdalena Makowska-Grzyska
- From the Center for Structural Genomics of Infectious Diseases, Computational Institute, University of Chicago, Chicago, Illinois 60637
| | - Youngchang Kim
- From the Center for Structural Genomics of Infectious Diseases, the Structural Biology Center, Biosciences, Argonne National Laboratory, Argonne, Illinois 60439, and Computational Institute, University of Chicago, Chicago, Illinois 60637
| | - Natalia Maltseva
- From the Center for Structural Genomics of Infectious Diseases, Computational Institute, University of Chicago, Chicago, Illinois 60637
| | - Jerzy Osipiuk
- From the Center for Structural Genomics of Infectious Diseases, the Structural Biology Center, Biosciences, Argonne National Laboratory, Argonne, Illinois 60439, and Computational Institute, University of Chicago, Chicago, Illinois 60637
| | - Minyi Gu
- From the Center for Structural Genomics of Infectious Diseases, Computational Institute, University of Chicago, Chicago, Illinois 60637
| | | | | | | | | | - Lizbeth Hedstrom
- the Departments of Biology and Chemistry, Brandeis University, Waltham, Massachusetts 024549110
| | - Andrzej Joachimiak
- From the Center for Structural Genomics of Infectious Diseases, the Structural Biology Center, Biosciences, Argonne National Laboratory, Argonne, Illinois 60439, and Computational Institute, University of Chicago, Chicago, Illinois 60637,
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Frederick DW, Davis JG, Dávila A, Agarwal B, Michan S, Puchowicz MA, Nakamaru-Ogiso E, Baur JA. Increasing NAD synthesis in muscle via nicotinamide phosphoribosyltransferase is not sufficient to promote oxidative metabolism. J Biol Chem 2014; 290:1546-58. [PMID: 25411251 DOI: 10.1074/jbc.m114.579565] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The NAD biosynthetic precursors nicotinamide mononucleotide and nicotinamide riboside are reported to confer resistance to metabolic defects induced by high fat feeding in part by promoting oxidative metabolism in skeletal muscle. Similar effects are obtained by germ line deletion of major NAD-consuming enzymes, suggesting that the bioavailability of NAD is limiting for maximal oxidative capacity. However, because of their systemic nature, the degree to which these interventions exert cell- or tissue-autonomous effects is unclear. Here, we report a tissue-specific approach to increase NAD biosynthesis only in muscle by overexpressing nicotinamide phosphoribosyltransferase, the rate-limiting enzyme in the salvage pathway that converts nicotinamide to NAD (mNAMPT mice). These mice display a ∼50% increase in skeletal muscle NAD levels, comparable with the effects of dietary NAD precursors, exercise regimens, or loss of poly(ADP-ribose) polymerases yet surprisingly do not exhibit changes in muscle mitochondrial biogenesis or mitochondrial function and are equally susceptible to the metabolic consequences of high fat feeding. We further report that chronic elevation of muscle NAD in vivo does not perturb the NAD/NADH redox ratio. These studies reveal for the first time the metabolic effects of tissue-specific increases in NAD synthesis and suggest that critical sites of action for supplemental NAD precursors reside outside of the heart and skeletal muscle.
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Affiliation(s)
- David W Frederick
- From the Department of Physiology, Institute for Diabetes, Obesity, and Metabolism and
| | - James G Davis
- From the Department of Physiology, Institute for Diabetes, Obesity, and Metabolism and
| | - Antonio Dávila
- From the Department of Physiology, Institute for Diabetes, Obesity, and Metabolism and
| | - Beamon Agarwal
- From the Department of Physiology, Institute for Diabetes, Obesity, and Metabolism and
| | - Shaday Michan
- Instituto Nacional de Geriatría, México, Distrito Federal 10200, México, and
| | - Michelle A Puchowicz
- Department of Nutrition, Mouse Metabolic Phenotyping Center, Case Western Reserve University, Cleveland, Ohio 44106
| | - Eiko Nakamaru-Ogiso
- Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104
| | - Joseph A Baur
- From the Department of Physiology, Institute for Diabetes, Obesity, and Metabolism and
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Del Nagro C, Xiao Y, Rangell L, Reichelt M, O'Brien T. Depletion of the central metabolite NAD leads to oncosis-mediated cell death. J Biol Chem 2014; 289:35182-92. [PMID: 25355314 DOI: 10.1074/jbc.m114.580159] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Depletion of the central metabolite NAD in cells results in broad metabolic defects leading to cell death and is a proposed novel therapeutic strategy in oncology. There is, however, a limited understanding of the underlying mechanisms that connect disruption of this central metabolite with cell death. Here we utilize GNE-617, a small molecule inhibitor of NAMPT, a rate-limiting enzyme required for NAD generation, to probe the pathways leading to cell death following NAD depletion. In all cell lines examined, NAD was rapidly depleted (average t½ of 8.1 h) following NAMPT inhibition. Concurrent with NAD depletion, there was a decrease in both cell proliferation and motility, which we attribute to reduced activity of NAD-dependent deacetylases because cells fail to deacetylate α-tubulin-K40 and histone H3-K9. Following depletion of NAD by >95%, cells lose the ability to regenerate ATP. Cell lines with a slower rate of ATP depletion (average t½ of 45 h) activate caspase-3 and show evidence of apoptosis and autophagy, whereas cell lines with rapid depletion ATP (average t½ of 32 h) do not activate caspase-3 or show signs of apoptosis or autophagy. However, the predominant form of cell death in all lines is oncosis, which is driven by the loss of plasma membrane homeostasis once ATP levels are depleted by >20-fold. Thus, our work illustrates the sequence of events that occurs in cells following depletion of a key metabolite and reveals that cell death caused by a loss of NAD is primarily driven by the inability of cells to regenerate ATP.
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Affiliation(s)
| | - Yang Xiao
- From the Departments of Translational Oncology and
| | - Linda Rangell
- Pathology, Genentech Inc., South San Francisco, California 94080
| | - Mike Reichelt
- Pathology, Genentech Inc., South San Francisco, California 94080
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Soncini D, Caffa I, Zoppoli G, Cea M, Cagnetta A, Passalacqua M, Mastracci L, Boero S, Montecucco F, Sociali G, Lasigliè D, Damonte P, Grozio A, Mannino E, Poggi A, D'Agostino VG, Monacelli F, Provenzani A, Odetti P, Ballestrero A, Bruzzone S, Nencioni A. Nicotinamide phosphoribosyltransferase promotes epithelial-to-mesenchymal transition as a soluble factor independent of its enzymatic activity. J Biol Chem 2014; 289:34189-204. [PMID: 25331943 DOI: 10.1074/jbc.m114.594721] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Boosting NAD(+) biosynthesis with NAD(+) intermediates has been proposed as a strategy for preventing and treating age-associated diseases, including cancer. However, concerns in this area were raised by observations that nicotinamide phosphoribosyltransferase (NAMPT), a key enzyme in mammalian NAD(+) biosynthesis, is frequently up-regulated in human malignancies, including breast cancer, suggesting possible protumorigenic effects for this protein. We addressed this issue by studying NAMPT expression and function in human breast cancer in vivo and in vitro. Our data indicate that high NAMPT levels are associated with aggressive pathological and molecular features, such as estrogen receptor negativity as well as HER2-enriched and basal-like PAM50 phenotypes. Consistent with these findings, we found that NAMPT overexpression in mammary epithelial cells induced epithelial-to-mesenchymal transition, a morphological and functional switch that confers cancer cells an increased metastatic potential. However, importantly, NAMPT-induced epithelial-to-mesenchymal transition was found to be independent of NAMPT enzymatic activity and of the NAMPT product nicotinamide mononucleotide. Instead, it was mediated by secreted NAMPT through its ability to activate the TGFβ signaling pathway via increased TGFβ1 production. These findings have implications for the design of therapeutic strategies exploiting NAD(+) biosynthesis via NAMPT in aging and cancer and also suggest the potential of anticancer agents designed to specifically neutralize extracellular NAMPT. Notably, because high levels of circulating NAMPT are found in obese and diabetic patients, our data could also explain the increased predisposition to cancer of these subjects.
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Affiliation(s)
| | | | - Gabriele Zoppoli
- the Institut Jules Bordet, Université Libre de Bruxelles, 1000 Brussels, Belgium, the Laboratory of Molecular Pharmacology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892
| | - Michele Cea
- From the Department of Internal Medicine, the Jerome Lipper Multiple Myeloma Center, Dana-Farber Cancer Institute, Harvard Medical School, Boston Novartis Institutes for BioMedical Research, Cambridge, Massachusetts 02139
| | - Antonia Cagnetta
- the Jerome Lipper Multiple Myeloma Center, Dana-Farber Cancer Institute, Harvard Medical School, Boston Novartis Institutes for BioMedical Research, Cambridge, Massachusetts 02139
| | - Mario Passalacqua
- Department of Experimental Medicine, Section of Biochemistry, and Italian Institute of Biostructures and Biosystems, University of Genoa, 16132 Genoa, Italy
| | - Luca Mastracci
- Department of Integrated Surgical and Diagnostic Sciences, Pathology Unit, University of Genoa, 16132 Genoa, Italy, the Istituto di Ricovero e Cura a Carattere Scientifico Azienda Ospedaliera Universitaria San Martino-Istituto Scientifico Tumori, Istituto Nazionale per la Ricerca sul Cancro, 16132 Genoa, Italy
| | - Silvia Boero
- the Istituto di Ricovero e Cura a Carattere Scientifico Azienda Ospedaliera Universitaria San Martino-Istituto Scientifico Tumori, Istituto Nazionale per la Ricerca sul Cancro, 16132 Genoa, Italy
| | - Fabrizio Montecucco
- From the Department of Internal Medicine, the Division of Cardiology, Foundation for Medical Researches, Department of Medical Specialties, University of Geneva, 1211 Geneva, Switzerland
| | - Giovanna Sociali
- Department of Experimental Medicine, Section of Biochemistry, and Center of Excellence for Biomedical Research, and
| | | | | | - Alessia Grozio
- Department of Experimental Medicine, Section of Biochemistry, and Center of Excellence for Biomedical Research, and
| | - Elena Mannino
- Department of Experimental Medicine, Section of Biochemistry, and Center of Excellence for Biomedical Research, and
| | - Alessandro Poggi
- the Istituto di Ricovero e Cura a Carattere Scientifico Azienda Ospedaliera Universitaria San Martino-Istituto Scientifico Tumori, Istituto Nazionale per la Ricerca sul Cancro, 16132 Genoa, Italy
| | - Vito G D'Agostino
- the Laboratory of Genomic Screening, Centre for Integrative Biology, University of Trento, 38123 Trento, Italy, and
| | | | - Alessandro Provenzani
- the Laboratory of Genomic Screening, Centre for Integrative Biology, University of Trento, 38123 Trento, Italy, and
| | - Patrizio Odetti
- From the Department of Internal Medicine, the Istituto di Ricovero e Cura a Carattere Scientifico Azienda Ospedaliera Universitaria San Martino-Istituto Scientifico Tumori, Istituto Nazionale per la Ricerca sul Cancro, 16132 Genoa, Italy
| | - Alberto Ballestrero
- From the Department of Internal Medicine, the Istituto di Ricovero e Cura a Carattere Scientifico Azienda Ospedaliera Universitaria San Martino-Istituto Scientifico Tumori, Istituto Nazionale per la Ricerca sul Cancro, 16132 Genoa, Italy
| | - Santina Bruzzone
- Department of Experimental Medicine, Section of Biochemistry, and Center of Excellence for Biomedical Research, and
| | - Alessio Nencioni
- From the Department of Internal Medicine, the Istituto di Ricovero e Cura a Carattere Scientifico Azienda Ospedaliera Universitaria San Martino-Istituto Scientifico Tumori, Istituto Nazionale per la Ricerca sul Cancro, 16132 Genoa, Italy,
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Abstract
CinA is a widely distributed protein in Gram-positive and Gram-negative bacteria. It is associated with natural competence and is proposed to have a function as an enzyme participating in the pyridine nucleotide cycle, which recycles products formed by non-redox uses of NAD. Here we report the determination of the crystal structure of CinA from Thermus thermophilus, in complex with several ligands. CinA was shown to have both nicotinamide mononucleotide deamidase and ADP-ribose pyrophosphatase activities. The crystal structure shows an unusual asymmetric dimer, with three domains for each chain; the C-terminal domain harbors the nicotinamide mononucleotide deamidase activity, and the structure of a complex with the product nicotinate mononucleotide suggests a mechanism for deamidation. The N-terminal domain belongs to the COG1058 family and is associated with the ADP-ribose pyrophosphatase activity. The asymmetry in the CinA dimer arises from two alternative orientations of the COG1058 domains, only one of which forms a contact with the KH-type domain from the other chain, effectively closing the active site into, we propose, a catalytically competent state. Structures of complexes with Mg2+/ADP-ribose, Mg2+/ATP, and Mg2+/AMP suggest a mechanism for the ADP-ribose pyrophosphatase reaction that involves a rotation of the COG1058 domain dimer as part of the reaction cycle, so that each active site oscillates between open and closed forms, thus promoting catalysis.
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Affiliation(s)
- Vijaykumar Karuppiah
- From the Faculty of Life Sciences, University of Manchester, Michael Smith Building, Oxford Road, Manchester M13 9PT, United Kingdom
| | - Angela Thistlethwaite
- From the Faculty of Life Sciences, University of Manchester, Michael Smith Building, Oxford Road, Manchester M13 9PT, United Kingdom
| | - Rana Dajani
- From the Faculty of Life Sciences, University of Manchester, Michael Smith Building, Oxford Road, Manchester M13 9PT, United Kingdom
| | - Jim Warwicker
- From the Faculty of Life Sciences, University of Manchester, Michael Smith Building, Oxford Road, Manchester M13 9PT, United Kingdom
| | - Jeremy P Derrick
- From the Faculty of Life Sciences, University of Manchester, Michael Smith Building, Oxford Road, Manchester M13 9PT, United Kingdom
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Nam TS, Park KH, Shawl AI, Kim BJ, Han MK, Kim Y, Moss J, Kim UH. Critical role for NAD glycohydrolase in regulation of erythropoiesis by hematopoietic stem cells through control of intracellular NAD content. J Biol Chem 2014; 289:16362-73. [PMID: 24759100 DOI: 10.1074/jbc.m114.560359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
NAD glycohydrolases (NADases) catalyze the hydrolysis of NAD to ADP-ribose and nicotinamide. Although many members of the NADase family, including ADP-ribosyltransferases, have been cloned and characterized, the structure and function of NADases with pure hydrolytic activity remain to be elucidated. Here, we report the structural and functional characterization of a novel NADase from rabbit reticulocytes. The novel NADase is a glycosylated, glycosylphosphatidylinositol-anchored cell surface protein exclusively expressed in reticulocytes. shRNA-mediated knockdown of the NADase in bone marrow cells resulted in a reduction of erythroid colony formation and an increase in NAD level. Furthermore, treatment of bone marrow cells with NAD, nicotinamide, or nicotinamide riboside, which induce an increase in NAD content, resulted in a significant decrease in erythroid progenitors. These results indicate that the novel NADase may play a critical role in regulating erythropoiesis of hematopoietic stem cells by modulating intracellular NAD.
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Affiliation(s)
- Tae-Sik Nam
- From the Department of Biochemistry, National Creative Research Laboratory for Ca Signaling Network, and
| | - Kwang-Hyun Park
- From the Department of Biochemistry, National Creative Research Laboratory for Ca Signaling Network, and
| | - Asif Iqbal Shawl
- From the Department of Biochemistry, National Creative Research Laboratory for Ca Signaling Network, and
| | - Byung-Ju Kim
- From the Department of Biochemistry, National Creative Research Laboratory for Ca Signaling Network, and
| | - Myung-Kwan Han
- Department of Microbiology, Chonbuk National University Medical School, Jeonju 561-182, Korea
| | - Youngho Kim
- Department of Biochemistry, School of Medicine, Wonkwang University, Iksan 570-749, Korea, and
| | - Joel Moss
- Cardiovascular and Pulmonary Branch, NHLBI, National Institutes of Health, Bethesda, Maryland 20892
| | - Uh-Hyun Kim
- From the Department of Biochemistry, National Creative Research Laboratory for Ca Signaling Network, and Institute of Cardiovascular Research, Chonbuk National University Medical School, Jeonju 561-182, Korea,
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7
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Hikosaka K, Ikutani M, Shito M, Kazuma K, Gulshan M, Nagai Y, Takatsu K, Konno K, Tobe K, Kanno H, Nakagawa T. Deficiency of nicotinamide mononucleotide adenylyltransferase 3 (nmnat3) causes hemolytic anemia by altering the glycolytic flow in mature erythrocytes. J Biol Chem 2014; 289:14796-811. [PMID: 24739386 DOI: 10.1074/jbc.m114.554378] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
NAD biosynthesis is of substantial interest because of its important roles in regulating various biological processes. Nicotinamide mononucleotide adenylyltransferase 3 (Nmnat3) is considered a mitochondria-localized NAD synthesis enzyme involved in de novo and salvage pathways. Although the biochemical properties of Nmnat3 are well documented, its physiological function in vivo remains unclear. In this study, we demonstrated that Nmnat3 was localized in the cytoplasm of mature erythrocytes and critically regulated their NAD pool. Deficiency of Nmnat3 in mice caused splenomegaly and hemolytic anemia, which was associated with the findings that Nmnat3-deficient erythrocytes had markedly lower ATP levels and shortened lifespans. However, the NAD level in other tissues were not apparently affected by the deficiency of Nmnat3. LC-MS/MS-based metabolomics revealed that the glycolysis pathway in Nmnat3-deficient erythrocytes was blocked at a glyceraldehyde 3-phosphate dehydrogenase (GAPDH) step because of the shortage of the coenzyme NAD. Stable isotope tracer analysis further demonstrated that deficiency of Nmnat3 resulted in glycolysis stall and a shift to the pentose phosphate pathway. Our findings indicate the critical roles of Nmnat3 in maintenance of the NAD pool in mature erythrocytes and the physiological impacts at its absence in mice.
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Affiliation(s)
| | - Masashi Ikutani
- Department of Immunobiology and Pharmacological Genetics, Graduate School of Medicine and Pharmaceutical Science for Research
| | - Masayuki Shito
- the Departments of Transfusion Medicine and Cell Processing and
| | - Kohei Kazuma
- the Institute of Natural Medicine, University of Toyama, Toyama 930-0194
| | - Maryam Gulshan
- From the Frontier Research Core for Life Sciences, The First Department of Internal Medicine, Graduate School of Medicine and Pharmaceutical Science for Research, and
| | - Yoshinori Nagai
- Department of Immunobiology and Pharmacological Genetics, Graduate School of Medicine and Pharmaceutical Science for Research, the JST, PRESTO, Saitama 332-0012, Japan
| | - Kiyoshi Takatsu
- Department of Immunobiology and Pharmacological Genetics, Graduate School of Medicine and Pharmaceutical Science for Research, the Toyama Prefectural Institute for Pharmaceutical Research, Toyama 939-0363, and
| | - Katsuhiro Konno
- the Institute of Natural Medicine, University of Toyama, Toyama 930-0194
| | - Kazuyuki Tobe
- The First Department of Internal Medicine, Graduate School of Medicine and Pharmaceutical Science for Research, and
| | - Hitoshi Kanno
- the Departments of Transfusion Medicine and Cell Processing and Advanced Biomedical Engineering and Science, Graduate School of Medicine, Tokyo Women's Medical University, Tokyo 162-8666
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