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Hesari Z, Nourbakhsh M, Hosseinkhani S, Abdolvahabi Z, Alipour M, Tavakoli-Yaraki M, Ghorbanhosseini SS, Yousefi Z, Jafarzadeh M, Yarahmadi S. Down-regulation of NAMPT expression by mir-206 reduces cell survival of breast cancer cells. Gene 2018; 673:149-158. [PMID: 29886033 DOI: 10.1016/j.gene.2018.06.021] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2018] [Revised: 06/05/2018] [Accepted: 06/07/2018] [Indexed: 01/10/2023]
Abstract
Nicotinamide adenine dinucleotide (NAD) is a critical coenzyme for all living cells. Nicotinamide phosphoribosyltransferase (NAMPT) functions as a key enzyme in the salvage pathway of NAD biosynthesis. Cancer cells have higher rate of NAD consumption and therefore NAMPT is essential for their survival. Thus, we investigated the effect of NAMPT inhibition by miR-206 on breast cancer cell survival. Breast cancer cells were transfected with miR-206 mimic, inhibitor and their negative controls. NAMPT levels were assessed by real-time PCR as well as western blotting. Cell survival assay and quantification of NAD level were performed by using colorimetric methods. Apoptosis assay was performed by labeling cells with Annexin V-FITC and propidium iodide followed by the flow cytometric analysis. Bioinformatics analysis was done to assess whether NAMPT 3'-UTR is a direct target of miR-206 and the results were confirmed by the luciferase reporter assay. NAMPT 3'-UTR was shown to be a direct target of miR-206. miR-206 reduced NAMPT expression at the protein level, leading to a significant decrease in the intracellular NAD level and subsequent decline in cell survival and induction of apoptosis. Targeting of NAMPT-mediated NAD salvage pathway by miR-206 might provide a new insight in the possible molecular mechanism of breast cancer cell growth regulation. This pathway might provide a new approach for breast cancer therapy.
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Affiliation(s)
- Zahra Hesari
- Department of Biochemistry, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Mitra Nourbakhsh
- Department of Biochemistry, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
| | - Saman Hosseinkhani
- Department of Biochemistry, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
| | - Zohreh Abdolvahabi
- Department of Biochemistry, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Mohsen Alipour
- Department of Nano biotechnology, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran; Department of Advanced Medical Sciences & Technologies, School of Medicine, Jahrom University of Medical Sciences, Jahrom, Iran; Research Center for Noncommunicable Diseases, School of Medicine, Jahrom University of Medical Sciences (JUMS), Jahrom, Iran
| | - Masoumeh Tavakoli-Yaraki
- Department of Biochemistry, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | | | - Zeynab Yousefi
- Department of Biochemistry, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Meisam Jafarzadeh
- Department of Molecular Genetics, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
| | - Sahar Yarahmadi
- Department of Biochemistry, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
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Santidrian AF, LeBoeuf SE, Wold ED, Ritland M, Forsyth JS, Felding BH. Nicotinamide phosphoribosyltransferase can affect metastatic activity and cell adhesive functions by regulating integrins in breast cancer. DNA Repair (Amst) 2014; 23:79-87. [PMID: 25263164 DOI: 10.1016/j.dnarep.2014.08.006] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2014] [Revised: 06/25/2014] [Accepted: 08/28/2014] [Indexed: 12/16/2022]
Abstract
NAD(+) metabolism is an essential regulator of cellular redox reactions, energy pathways, and a substrate provider for NAD(+) consuming enzymes. We recently demonstrated that enhancement of NAD(+)/NADH levels in breast cancer cells with impaired mitochondrial NADH dehydrogenase activity, through augmentation of complex I or by supplementing tumor cell nutrients with NAD(+) precursors, inhibits tumorigenicity and metastasis. To more fully understand how aberrantly low NAD(+) levels promote tumor cell dissemination, we here asked whether inhibition of NAD(+) salvage pathway activity by reduction in nicotinamide phosphoribosyltransferase (NAMPT) expression can impact metastasis and tumor cell adhesive functions. We show that knockdown of NAMPT, the enzyme catalyzing the rate-limiting step of the NAD(+) salvage pathway, enhances metastatic aggressiveness in human breast cancer cells and involves modulation of integrin expression and function. Reduction in NAMPT expression is associated with upregulation of select adhesion receptors, particularly αvβ3 and β1 integrins, and results in increased breast cancer cell attachment to extracellular matrix proteins, a key function in tumor cell dissemination. Interestingly, NAMPT downregulation prompts expression of integrin αvβ3 in a high affinity conformation, known to promote tumor cell adhesive interactions during hematogenous metastasis. NAMPT has been selected as a therapeutic target for cancer therapy based on the essential functions of this enzyme in NAD(+) metabolism, cellular redox, DNA repair and energy pathways. Notably, our results indicate that incomplete inhibition of NAMPT, which impedes NAD(+) metabolism but does not kill a tumor cell can alter its phenotype to be more aggressive and metastatic. This phenomenon could promote cancer recurrence, even if NAMPT inhibition initially reduces tumor growth.
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Affiliation(s)
- Antonio F Santidrian
- Departments of Chemical Physiology and Molecular and Experimental Medicine, The Scripps Research Institute, 10550 N Torrey Pines Road, La Jolla, CA 92037, USA.
| | - Sarah E LeBoeuf
- Departments of Chemical Physiology and Molecular and Experimental Medicine, The Scripps Research Institute, 10550 N Torrey Pines Road, La Jolla, CA 92037, USA.
| | - Erik D Wold
- Departments of Chemical Physiology and Molecular and Experimental Medicine, The Scripps Research Institute, 10550 N Torrey Pines Road, La Jolla, CA 92037, USA.
| | - Melissa Ritland
- Departments of Chemical Physiology and Molecular and Experimental Medicine, The Scripps Research Institute, 10550 N Torrey Pines Road, La Jolla, CA 92037, USA.
| | - Jane S Forsyth
- Departments of Chemical Physiology and Molecular and Experimental Medicine, The Scripps Research Institute, 10550 N Torrey Pines Road, La Jolla, CA 92037, USA.
| | - Brunhilde H Felding
- Departments of Chemical Physiology and Molecular and Experimental Medicine, The Scripps Research Institute, 10550 N Torrey Pines Road, La Jolla, CA 92037, USA.
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Abstract
NAD is a vital molecule in all organisms. It is a key component of both energy and signal transduction--processes that undergo crucial changes in cancer cells. NAD(+)-dependent signalling pathways are many and varied, and they regulate fundamental events such as transcription, DNA repair, cell cycle progression, apoptosis and metabolism. Many of these processes have been linked to cancer development. Given that NAD(+)-dependent signalling reactions involve the degradation of the molecule, permanent nucleotide resynthesis through different biosynthetic pathways is crucial for incessant cancer cell proliferation. This necessity supports the targeting of NAD metabolism as a new therapeutic concept for cancer treatment.
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Affiliation(s)
- Alberto Chiarugi
- Department of Preclinical and Clinical Pharmacology, University of Firenze, 50139, Italy
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Kunjara S, Greenbaum AL, Sochor M, Ali M, Flyvbjerg A, Grønbaek H, McLean P. Effects of long-acting somatostatin analogues on adrenal growth and phosphoribosyl pyrophosphate formation in experimental diabetes. Int J Exp Pathol 2012; 93:56-69. [PMID: 22264286 DOI: 10.1111/j.1365-2613.2011.00801.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Adrenal growth and increased adrenal function occur in experimental diabetes. Previously, we have shown that phosphoribosyl pyrophosphate (PRPP) and PRPP synthetase increased rapidly between 3 and 7 days after induction of diabetes with streptozotocin (STZ), with less marked changes in enzymes of the pentose phosphate pathway. The present study examines the earlier phase of 1-3 days following induction of diabetes, seeking to elucidate whether control of PRPP production is a result of diabetic hyperglycaemia, or to a more general re-ordering of hormonal factors. To investigate this question, the role of insulin and two different long-acting somatostatin analogues, Angiopeptin and Sandostatin, were used in a well-established animal model. PRPP was chosen specifically as a target for these studies in view of its central role in nucleotide formation and nicotinamide mononucleotide synthesis via Nampt which is the rate-limiting step in the synthesis of NAD and which has been shown to have multiple roles in cell signalling in addition to its known function in glycolysis and energy production. Treatment with the somatostatin analogues ab initio effectively abolished the adrenal growth, the increase in PRPP formation and the rise of PRPP synthetase activity in the first 7 days of diabetes, without having any significant effect on blood glucose values. This suggests that elevated glucose per se is not responsible for the diabetic adrenal hypertrophy and implies that growth factors/hormones, regulated by somatostatin analogues, play a significant role in adrenal growth processes.
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Affiliation(s)
- Sirilaksana Kunjara
- Division of Biosciences, Metabolic Regulation Group, University College London, Gower Street, London, UK
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Carlson LA, Boberg J, HÖgstedt B. Some physiological and clinical implications of lipid mobilization from adipose tissue
1. Compr Physiol 2011. [DOI: 10.1002/cphy.cp050163] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Scow RO. Perfusion of isolated adipose tissue: FFA release and blood flow in rat parametrial fat body. Compr Physiol 2011. [DOI: 10.1002/cphy.cp050145] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Siebert G, Humphrey GB. Enzymology of the nucleus. ADVANCES IN ENZYMOLOGY AND RELATED AREAS OF MOLECULAR BIOLOGY 2006; 27:239-88. [PMID: 4303032 DOI: 10.1002/9780470122723.ch5] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Stirpe F, Aldridge WN. Diphosphopyridine nucleotide pyrophosphorylase in the nuclei isolated from poisoned and regenerating rat liver. Biochem J 2006; 80:481-7. [PMID: 16748921 PMCID: PMC1243257 DOI: 10.1042/bj0800481] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- F Stirpe
- Toxicology Research Unit, M.R.C. Laboratories, Woodmansterne Road, Carshalton, Surrey
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Zhang X, Kurnasov OV, Karthikeyan S, Grishin NV, Osterman AL, Zhang H. Structural characterization of a human cytosolic NMN/NaMN adenylyltransferase and implication in human NAD biosynthesis. J Biol Chem 2003; 278:13503-11. [PMID: 12574164 DOI: 10.1074/jbc.m300073200] [Citation(s) in RCA: 94] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Pyridine dinucleotides (NAD and NADP) are ubiquitous cofactors involved in hundreds of redox reactions essential for the energy transduction and metabolism in all living cells. In addition, NAD also serves as a substrate for ADP-ribosylation of a number of nuclear proteins, for silent information regulator 2 (Sir2)-like histone deacetylase that is involved in gene silencing regulation, and for cyclic ADP ribose (cADPR)-dependent Ca(2+) signaling. Pyridine nucleotide adenylyltransferase (PNAT) is an indispensable central enzyme in the NAD biosynthesis pathways catalyzing the condensation of pyridine mononucleotide (NMN or NaMN) with the AMP moiety of ATP to form NAD (or NaAD). Here we report the identification and structural characterization of a novel human PNAT (hsPNAT-3) that is located in the cytoplasm and mitochondria. Its subcellular localization and tissue distribution are distinct from the previously identified human nuclear PNAT-1 and PNAT-2. Detailed structural analysis of PNAT-3 in its apo form and in complex with its substrate(s) or product revealed the catalytic mechanism of the enzyme. The characterization of the cytosolic human PNAT-3 provided compelling evidence that the final steps of NAD biosynthesis pathways may exist in mammalian cytoplasm and mitochondria, potentially contributing to their NAD/NADP pool.
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Affiliation(s)
- Xuejun Zhang
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA.
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McLEAN P. Carbohydrate metabolism of mammary tissue. II. Levels of oxidised and reduced diphosphopyridine nucleotide and triphosphopyridine nucleotide in the rat mammary gland. ACTA ACUST UNITED AC 2000; 30:316-24. [PMID: 13607448 DOI: 10.1016/0006-3002(58)90056-8] [Citation(s) in RCA: 103] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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ATKINSON MR, JACKSON JF, MORTON RK. Nicotinamide mononucleotide adenylyltransferase of pig-liver nuclei. The effects of nicotinamide mononucleotide concentration and pH on dinucleotide synthesis. Biochem J 1998; 80:318-23. [PMID: 13684981 PMCID: PMC1244001 DOI: 10.1042/bj0800318] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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HAWTREY AO, SILK MH. Mitochondria of the Ehrlich ascites-tumour cell. Isolation and studies of oxidative phosphorylation. Biochem J 1998; 74:21-6. [PMID: 14400276 PMCID: PMC1204043 DOI: 10.1042/bj0740021] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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CHRISTIE GS, BAILIE MJ, LE PAGE RN. Acute toxic liver injury. nicotinamide-adenine dinucleotide-pyrophosphorylase activity of nuclei isolated from rat liver in heliotrine and in dimethylnitrosamine poisoning. Biochem J 1998; 84:364-8. [PMID: 13879300 PMCID: PMC1243677 DOI: 10.1042/bj0840364] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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ATKINSON MR, JACKSON JF, MORTON RK. Substrate specificity and inhibition of nicotinamide mononucleotideadenylyl transferase of liver nuclei: possible mechanism of effect of 6-mercaptopurine on tumour growth. Nature 1998; 192:946-8. [PMID: 13863112 DOI: 10.1038/192946a0] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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CAIGER P, MORTON RK, FILSELL OH, JARRETT IG. A comparative study of nicotinamide nucleotide coenzymes during growth of the sheep and rat. Biochem J 1998; 85:351-9. [PMID: 14017726 PMCID: PMC1243741 DOI: 10.1042/bj0850351] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Boulton S, Kyle S, Durkacz BW. Low nicotinamide mononucleotide adenylyltransferase activity in a tiazofurin-resistant cell line: effects on NAD metabolism and DNA repair. Br J Cancer 1997; 76:845-51. [PMID: 9328141 PMCID: PMC2228057 DOI: 10.1038/bjc.1997.473] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Poly(ADP-ribose) polymerase (PADPRP), which uses NAD to synthesize ADP-ribose polymers, is activated by DNA strand breaks and mediates cellular responses to DNA damage. The consequences of low cellular NAD levels in a cell line deficient in nicotinamide mononucleotide adenylyltransferase (NMNAT), an enzyme essential for NAD biosynthesis, were investigated by assessing NAD metabolism and DNA repair after treatment with alkylating agents. A tiazofurin-resistant L1210 cell line (TZR) was isolated. NAD levels were approximately 5933 and 3375 pmol mg(-1) protein for parental (wild type, WT) and TZR cells respectively, and NMNAT levels were reduced by > 95%. TZR cells were more sensitive to temozolomide (TM) and 1-methyl-3-nitro-1-nitroso-guanidine (MNNG), particularly at concentrations that caused > 50% NAD depletion. TM and MNNG treatment decreased NAD levels in both cell lines, but took longer to return to control levels in TZR cells. For example, MNNG (5 microM), depleted NAD levels at 6 h to approximately 4512 (WT) and 1442 (TZR) pmol mg(-1) protein; however, NAD levels had returned to control levels by 8 h in WT cells, but were not restored by 16 h in TZR cells. Both cell lines were equisensitive to the growth-inhibitory effects of NU1025 per se (IC50 370 microM). Co-exposure of the cell lines to TM (100 microM) with increasing concentrations of NU1025 led to a synergistic enhancement of cytotoxicity, with IC50 values for NU1025 decreasing to 17 +/- 4 microM (TZR) and 37 +/- 6 microM (WT). A similar enhanced sensitivity to NU1025 (approximately 2.7-fold) was obtained when TZR cells were co-exposed to MNNG + NU1025. TM-induced DNA strand breaks were increased by co-incubation with NU1025, and again the TZR cell line showed increased sensitivity to NU1025. There were no significant changes in NMNAT activity in response to MNNG treatment over 24 h, either in the presence or in the absence of NU1025. These data demonstrate that modest decreases in cellular NAD levels can sensitize cells to alkylating agents and PADPRP inhibitors.
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Affiliation(s)
- S Boulton
- Cancer Research Unit, Medical School, University of Newcastle upon Tyne, UK
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SHIMOYAMA M, KORI J, USUKI K, LAN SJ, GHOLSON RK. ENZYMIC LESIONS OF NICOTINAMIDE-ADENINE DINUCLEOTIDE BIOSYNTHESIS IN HEPATOMAS. Biochim Biophys Acta Gen Subj 1996; 97:402-4. [PMID: 14292866 DOI: 10.1016/0304-4165(65)90124-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Lowe G, Tansley G. The stereochemical course of nucleotidyl transfer catalysed by NAD pyrophosphorylase. EUROPEAN JOURNAL OF BIOCHEMISTRY 1983; 132:117-20. [PMID: 6301818 DOI: 10.1111/j.1432-1033.1983.tb07334.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
NAD pyrophosphorylase catalyses nucleotidyl transfer from adenosine (R)-5'-[alpha-17O]triphosphate to nicotinamide mononucleotide with inversion of configuration at the alpha-P giving (S)-[17O]NAD+. The simplest interpretation of this observation is that the adenylyl group is transferred directly from ATP to the co-substrate by an 'in line' mechanism. It is also shown that snake venom phosphodiesterase hydrolyses NAD+ regio-specifically at the adenylyl terminus of the pyrophosphate bond.
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Ferro AM, Kuehl L. Adenosine triphosphate: nicotinamide mononucleotide adenylyltransferase of pig liver. Purification and properties. BIOCHIMICA ET BIOPHYSICA ACTA 1975; 410:285-9. [PMID: 1090 DOI: 10.1016/0005-2744(75)90231-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Adenosine triphosphate : nicotinamide mononucleotide adenylyltransferase (EC 2.7.7.1) has been purifiec approximately 3500-fold from an extract of pig liver nuclei to a specific activity of 40 mumol of NAD+ per min per mg protein. The enzyme was found to have a molecular weight of 203 000, a frictional ratio of 1.6 and an isoelectric point of approximately 5. Michaelis constants for ATP and NMN were 0.11 mM and 0.12 mM, respectively.
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GRUNICKE H, KELLER HJ, PUSCHENDORF B, BENAGUID A. Biosynthesis of Nicotinamide Adenine Dinucleotide in Mitochondria. ACTA ACUST UNITED AC 1975. [DOI: 10.1111/j.1432-1033.1975.tb04039.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Jacobson EL, Jacobson MK, Bernofsky C. NAD levels in 3T3 cells during exponential growth and density-dependent inhibition of growth. FEBS Lett 1974; 47:23-5. [PMID: 4372089 DOI: 10.1016/0014-5793(74)80417-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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