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Ou LP, Liu YJ, Qiu ST, Yang C, Tang JX, Li XY, Liu HF, Ye ZN. Glutaminolysis is a Potential Therapeutic Target for Kidney Diseases. Diabetes Metab Syndr Obes 2024; 17:2789-2807. [PMID: 39072347 PMCID: PMC11283263 DOI: 10.2147/dmso.s471711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2024] [Accepted: 07/15/2024] [Indexed: 07/30/2024] Open
Abstract
Metabolic reprogramming contributes to the progression and prognosis of various kidney diseases. Glutamine is the most abundant free amino acid in the body and participates in more metabolic processes than other amino acids. Altered glutamine metabolism is a prominent feature in different kidney diseases. Glutaminolysis converts glutamine into the TCA cycle metabolite, alpha-ketoglutarate, via a cascade of enzymatic reactions. This metabolic pathway plays pivotal roles in inflammation, maladaptive repair, cell survival and proliferation, redox homeostasis, and immune regulation. Given the crucial role of glutaminolysis in bioenergetics and anaplerotic fluxes in kidney pathogenesis, studies on this cascade could provide a better understanding of kidney diseases, thus inspiring the development of potential methods for targeted therapy. Emerging evidence has shown that targeting glutaminolysis is a promising therapeutic strategy for ameliorating kidney disease. In this narrative review, equation including keywords related to glutamine, glutaminolysis and kidney are subjected to an exhaustive search on Pubmed database, we identified all relevant articles published before 1 April, 2024. Afterwards, we summarize the regulation of glutaminolysis in major kidney diseases and its underlying molecular mechanisms. Furthermore, we highlight therapeutic strategies targeting glutaminolysis and their potential clinical applications.
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Affiliation(s)
- Li-Ping Ou
- Institute of Nephrology, and Guangdong Provincial Key Laboratory of Autophagy and Major Chronic Non-Communicable Diseases, and Key Laboratory of Prevention and Management of Chronic Kidney Disease of Zhanjiang City, Affiliated Hospital of Guangdong Medical University, Zhanjiang, 524001, People’s Republic of China
| | - Yong-Jian Liu
- Institute of Nephrology, and Guangdong Provincial Key Laboratory of Autophagy and Major Chronic Non-Communicable Diseases, and Key Laboratory of Prevention and Management of Chronic Kidney Disease of Zhanjiang City, Affiliated Hospital of Guangdong Medical University, Zhanjiang, 524001, People’s Republic of China
| | - Shi-Tong Qiu
- Institute of Nephrology, and Guangdong Provincial Key Laboratory of Autophagy and Major Chronic Non-Communicable Diseases, and Key Laboratory of Prevention and Management of Chronic Kidney Disease of Zhanjiang City, Affiliated Hospital of Guangdong Medical University, Zhanjiang, 524001, People’s Republic of China
| | - Chen Yang
- Institute of Nephrology, and Guangdong Provincial Key Laboratory of Autophagy and Major Chronic Non-Communicable Diseases, and Key Laboratory of Prevention and Management of Chronic Kidney Disease of Zhanjiang City, Affiliated Hospital of Guangdong Medical University, Zhanjiang, 524001, People’s Republic of China
| | - Ji-Xin Tang
- Institute of Nephrology, and Guangdong Provincial Key Laboratory of Autophagy and Major Chronic Non-Communicable Diseases, and Key Laboratory of Prevention and Management of Chronic Kidney Disease of Zhanjiang City, Affiliated Hospital of Guangdong Medical University, Zhanjiang, 524001, People’s Republic of China
| | - Xiao-Yu Li
- Institute of Nephrology, and Guangdong Provincial Key Laboratory of Autophagy and Major Chronic Non-Communicable Diseases, and Key Laboratory of Prevention and Management of Chronic Kidney Disease of Zhanjiang City, Affiliated Hospital of Guangdong Medical University, Zhanjiang, 524001, People’s Republic of China
| | - Hua-Feng Liu
- Institute of Nephrology, and Guangdong Provincial Key Laboratory of Autophagy and Major Chronic Non-Communicable Diseases, and Key Laboratory of Prevention and Management of Chronic Kidney Disease of Zhanjiang City, Affiliated Hospital of Guangdong Medical University, Zhanjiang, 524001, People’s Republic of China
| | - Zhen-Nan Ye
- Institute of Nephrology, and Guangdong Provincial Key Laboratory of Autophagy and Major Chronic Non-Communicable Diseases, and Key Laboratory of Prevention and Management of Chronic Kidney Disease of Zhanjiang City, Affiliated Hospital of Guangdong Medical University, Zhanjiang, 524001, People’s Republic of China
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Shurubor YI, Krasnikov AB, Isakova EP, Deryabina YI, Yudin VS, Keskinov AA, Krasnikov BF. Energy Metabolites and Indicative Significance of α-Ketoglutarate and α-Ketoglutaramate in Assessing the Progression of Chronic Hepatoencephalopathy. Biomolecules 2024; 14:217. [PMID: 38397454 PMCID: PMC10887089 DOI: 10.3390/biom14020217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 02/02/2024] [Accepted: 02/06/2024] [Indexed: 02/25/2024] Open
Abstract
In the example of a rat model with chronic hepatoencephalopathy (HE), changes in the organ morphology of rats affect the balance of metabolites of the tricarboxylic acid (TCA) cycle and metabolites of the glutamine-glutamate (Gln-Glu) cycle, namely α-ketoglutarate (αKG) and α-ketoglutaramate (αKGM), as well as the enzymes associated with them, ω-amidase (ωA) and glutamine transaminase (GTK). This model of rats was obtained as a result of 2-22 weeks of consumption by animals of hepatotoxin thioacetamide (TAA) added to drinking water at a concentration of 0.4 g/L. The control (n = 26) and TAA-induced (n = 55) groups of rats consisted of 11 cohorts each. The control cohorts consisted of 2-4 rats, and the TAA-induced cohorts consisted of 4-7 individuals. Every two weeks, samples of blood plasma, liver, kidney, and brain tissues were taken from the next cohort of rats (a total of 320 samples). By the end of the experiment, irreversible morphological changes were observed in the organs of rats: the weight of the animals was reduced up to ~45%, the weight of the kidneys up to 5%, the brain up to ~20%, and the weight of the liver increased up to ~20%. The analysis revealed: (i) a decrease in the activity of ωA and GTK in the tissues of the brain, kidneys, and liver of rats with chronic HE (by ~3, 40, and 65% and ~10, 60, and 70%, respectively); and (ii) the appearance of a significant imbalance in the content of metabolites of the Gln-Glu cycle, αKG, and αKGM. It is indicative that a ~1.5-12-fold increase in the level of αKG in the blood plasma and tissues of the organs of rats with chronic HE was accompanied by a synchronous, ~1.2-2.5-fold decrease in the level of αKGM. The data obtained indicate an essential involvement of the Gln-Glu cycle in the regulation of energy metabolism in rats under conditions of chronic HE. Attention is focused on the significance of the αKG/αKGM ratio, which can act as a potential marker for diagnosing the degree of HE development.
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Affiliation(s)
- Yevgeniya I. Shurubor
- Centre for Strategic Planning of FMBA of Russia, Pogodinskaya St., Bld. 10, 119121 Moscow, Russia; (Y.I.S.); (V.S.Y.); (A.A.K.)
| | | | - Elena P. Isakova
- Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia; (E.P.I.); (Y.I.D.)
| | - Yulia I. Deryabina
- Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia; (E.P.I.); (Y.I.D.)
| | - Vladimir S. Yudin
- Centre for Strategic Planning of FMBA of Russia, Pogodinskaya St., Bld. 10, 119121 Moscow, Russia; (Y.I.S.); (V.S.Y.); (A.A.K.)
| | - Anton A. Keskinov
- Centre for Strategic Planning of FMBA of Russia, Pogodinskaya St., Bld. 10, 119121 Moscow, Russia; (Y.I.S.); (V.S.Y.); (A.A.K.)
| | - Boris F. Krasnikov
- Centre for Strategic Planning of FMBA of Russia, Pogodinskaya St., Bld. 10, 119121 Moscow, Russia; (Y.I.S.); (V.S.Y.); (A.A.K.)
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, N.I. Pirogov Russian National Research Medical University, 1 Ostrovitianova Str., 117997 Moscow, Russia
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Vuksanovic N, Melkonian TR, Serrano DA, Schwabacher AW, Silvaggi NR. Structural and Biochemical Characterization of MppQ, an L-Enduracididine Biosynthetic Enzyme from Streptomyces hygroscopicus. Biochemistry 2023; 62:3105-3115. [PMID: 37890134 DOI: 10.1021/acs.biochem.3c00428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/29/2023]
Abstract
MppQ is an enzyme of unknown function from Streptomyces hygroscopicus (ShMppQ) that operates in the biosynthesis of the nonproteinogenic amino acid L-enduracididine (L-End). Since L-End is a component of several peptides showing activity against antibiotic-resistant pathogens, understanding its biosynthetic pathway could facilitate the development of chemoenzymatic routes to novel antibiotics. Herein, we report on the crystal structures of ShMppQ complexed with pyridoxal-5'-phosphate (PLP) and pyridoxamine-5'-phosphate (PMP). ShMppQ is similar to fold-type I PLP-dependent aminotransferases like aspartate aminotransferase. The tertiary structure of ShMppQ is composed of an N-terminal extension, a large domain, and a small domain. The active site is placed at the junction of the large and small domains and includes residues from both protomers of the homodimer. We also report the first functional characterization of MppQ, which we incubated with the enzymatically produced 2-ketoenduracidine and observed the conversion to L-End, establishing ShMppQ as the final enzyme in L-End biosynthesis. Additionally, we have observed that MppQ has a relatively high affinity for 2-keto-5-guanidinovaleric acid (i.e., 2-ketoarginine), a shunt product of MppP, indicating the potential role of MppQ in increasing the efficiency of L-End biosynthesis by converting 2-ketoarginine back to the starting material, l-arginine. A panel of potential amino-donor substrates was tested for the transamination activity against a saturating concentration of 2-ketoarginine in end-point assays. Most l-Arg was produced with l-ornithine as the donor substrate. Steady-state kinetic analysis of the transamination reaction with l-Orn and 2-ketoarginine shows that the kinetic constants are in line with those for the amino donor substrate of other fold-type I aminotransferases.
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Affiliation(s)
- Nemanja Vuksanovic
- Department of Chemistry and Biochemistry, University of Wisconsin-Milwaukee, 3210 North Cramer Street, Milwaukee, Wisconsin 53211, United States
- Department of Chemistry, Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215, United States
| | - Trevor R Melkonian
- Department of Chemistry and Biochemistry, University of Wisconsin-Milwaukee, 3210 North Cramer Street, Milwaukee, Wisconsin 53211, United States
- Division of Chemical Biology and Medicinal Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Dante A Serrano
- Department of Chemistry and Biochemistry, University of Wisconsin-Milwaukee, 3210 North Cramer Street, Milwaukee, Wisconsin 53211, United States
- Department of Chemistry, Pennsylvania State University, 302 Chemistry Building, University Park, Pennsylvania 16802, United States
| | - Alan W Schwabacher
- Department of Chemistry and Biochemistry, University of Wisconsin-Milwaukee, 3210 North Cramer Street, Milwaukee, Wisconsin 53211, United States
| | - Nicholas R Silvaggi
- Department of Chemistry and Biochemistry, University of Wisconsin-Milwaukee, 3210 North Cramer Street, Milwaukee, Wisconsin 53211, United States
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Cooper AJL, Dorai T, Pinto JT, Denton TT. Metabolic Heterogeneity, Plasticity, and Adaptation to "Glutamine Addiction" in Cancer Cells: The Role of Glutaminase and the GTωA [Glutamine Transaminase-ω-Amidase (Glutaminase II)] Pathway. BIOLOGY 2023; 12:1131. [PMID: 37627015 PMCID: PMC10452834 DOI: 10.3390/biology12081131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 07/06/2023] [Accepted: 07/21/2023] [Indexed: 08/27/2023]
Abstract
Many cancers utilize l-glutamine as a major energy source. Often cited in the literature as "l-glutamine addiction", this well-characterized pathway involves hydrolysis of l-glutamine by a glutaminase to l-glutamate, followed by oxidative deamination, or transamination, to α-ketoglutarate, which enters the tricarboxylic acid cycle. However, mammalian tissues/cancers possess a rarely mentioned, alternative pathway (the glutaminase II pathway): l-glutamine is transaminated to α-ketoglutaramate (KGM), followed by ω-amidase (ωA)-catalyzed hydrolysis of KGM to α-ketoglutarate. The name glutaminase II may be confused with the glutaminase 2 (GLS2) isozyme. Thus, we recently renamed the glutaminase II pathway the "glutamine transaminase-ω-amidase (GTωA)" pathway. Herein, we summarize the metabolic importance of the GTωA pathway, including its role in closing the methionine salvage pathway, and as a source of anaplerotic α-ketoglutarate. An advantage of the GTωA pathway is that there is no net change in redox status, permitting α-ketoglutarate production during hypoxia, diminishing cellular energy demands. We suggest that the ability to coordinate control of both pathways bestows a metabolic advantage to cancer cells. Finally, we discuss possible benefits of GTωA pathway inhibitors, not only as aids to studying the normal biological roles of the pathway but also as possible useful anticancer agents.
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Affiliation(s)
- Arthur J. L. Cooper
- Department of Biochemistry and Molecular Biology, New York Medical College, 15 Dana Road, Valhalla, NY 10595, USA; (T.D.); (J.T.P.)
| | - Thambi Dorai
- Department of Biochemistry and Molecular Biology, New York Medical College, 15 Dana Road, Valhalla, NY 10595, USA; (T.D.); (J.T.P.)
- Department of Urology, New York Medical College, Valhalla, NY 10595, USA
| | - John T. Pinto
- Department of Biochemistry and Molecular Biology, New York Medical College, 15 Dana Road, Valhalla, NY 10595, USA; (T.D.); (J.T.P.)
| | - Travis T. Denton
- Department Pharmaceutical Sciences, College of Pharmacy & Pharmaceutical Sciences, Washington State University Health Sciences Spokane, Spokane, WA 99202, USA
- Department of Translational Medicine and Physiology, Elson S. Floyd College of Medicine, Washington State University Health Sciences Spokane, Spokane, WA 99164, USA
- Steve Gleason Institute for Neuroscience, Washington State University Health Sciences Spokane, Spokane, WA 99164, USA
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Serum Metabolites Associated with Muscle Hypertrophy after 8 Weeks of High- and Low-Load Resistance Training. Metabolites 2023; 13:metabo13030335. [PMID: 36984775 PMCID: PMC10058868 DOI: 10.3390/metabo13030335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 02/13/2023] [Accepted: 02/18/2023] [Indexed: 02/26/2023] Open
Abstract
The mechanisms responsible for the similar muscle growth attained with high- and low-load resistance training (RT) have not yet been fully elucidated. One mechanism is related to the mechanical stimulus and the level of motor unit recruitment; another mechanism is related to the metabolic response. We investigated the electromyographic signal amplitude (sEMG) and the general metabolic response to high-load RT (HL) and low-load resistance training (LL). We measured muscle thickness by ultrasound, sEMG amplitude by electromyography, and analysis of metabolites expressed through metabolomics. No differences were observed between the HL and LL groups for metabolic response and muscle thickness. A greater amplitude of sEMG was observed in the HL group. In addition, a correlation was observed between changes in muscle thickness of the vastus lateralis muscle in the HL group and levels of the metabolites carnitine, creatine, 3-hydroxyisovalerate, phenylalanine, asparagine, creatine phosphate, and methionine. In the LL group, a correlation was observed between changes in muscle thickness of the vastus lateralis muscle and levels of the metabolites acetoacetate, creatine phosphate, and oxypurinol. These correlations seem to be related to the characteristics of activated muscle fibers, the metabolic demand of the training protocols used, and the process of protein synthesis.
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Yue Z, Liu Y, Chen Y, Chen C, Zhang J, He L, Ma K. Comprehensive Genomics and Proteomics Analysis Reveals the Multiple Response Strategies of Endophytic Bacillus sp. WR13 to Iron Limitation. Microorganisms 2023; 11:microorganisms11020367. [PMID: 36838332 PMCID: PMC9961900 DOI: 10.3390/microorganisms11020367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 01/25/2023] [Accepted: 01/27/2023] [Indexed: 02/05/2023] Open
Abstract
Iron (Fe) is an important metal element for the growth of bacteria. Many bacteria respond to Fe limitation through a variety of strategies. We previously isolated an endophyte Bacillus sp. WR13 from wheat root. However, whether and how this strain can cope with Fe-deficient environments remains unclear. In this study, the growth of WR13 under Fe starvation was investigated, and the underlying mechanisms of WR13 in response to Fe starvation were elucidated via genomics and iTRAQ-based proteomics. Under Fe limitation, WR13 showed a growth pattern similar to that of Fe sufficiency. Genomics analysis demonstrated that WR13 had gene clusters related to siderophore synthesis (dhbACEBF), transportation (bcbE), uptake (feuABC-yusV) and hydrolysis (besA). These genes were significantly up-regulated in Fe-starved WR13, which resulted in more siderophore production. Proteomics data revealed that many Fe-containing proteins such as ACO, HemQ, ferredoxin, CNP, and SufD were significantly reduced under Fe limitation. Meanwhile, significant decreases in many proteins involved in glycolysis, TCA cycle, pentose phosphate pathway; asparagine, glutamine, methionine, and serine metabolism; and phospholipid hydrolysis were also observed. Overall, this study shows that Bacillus sp. WR13 was able to respond to Fe limitation via multiple strategies and provides a theoretical basis for the application of WR13 in Fe-deficient soil.
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Affiliation(s)
- Zonghao Yue
- College of Life Sciences and Agronomy, Zhoukou Normal University, Zhoukou 466001, China
| | - Yongchuang Liu
- College of Life Sciences and Agronomy, Zhoukou Normal University, Zhoukou 466001, China
| | - Yanjuan Chen
- School of Mechanical and Electrical Engineering, Zhoukou Normal University, Zhoukou 466001, China
| | - Can Chen
- Henan Key Laboratory of Plant Molecular Breeding and Bioreactor, Zhoukou 466001, China
| | - Ju Zhang
- Henan Key Laboratory of Plant Molecular Breeding and Bioreactor, Zhoukou 466001, China
| | - Le He
- College of Life Sciences and Agronomy, Zhoukou Normal University, Zhoukou 466001, China
| | - Keshi Ma
- College of Life Sciences and Agronomy, Zhoukou Normal University, Zhoukou 466001, China
- Correspondence: ; Tel.: +86-158-9672-0176
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Cooper AJL, Dorai T, Pinto JT, Denton TT. α-Ketoglutaramate-A key metabolite contributing to glutamine addiction in cancer cells. Front Med (Lausanne) 2022; 13:1035335. [PMID: 36404951 PMCID: PMC9671947 DOI: 10.3389/fmed.2022.1035335] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Accepted: 10/10/2022] [Indexed: 08/27/2023] Open
Affiliation(s)
- Arthur J. L. Cooper
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, NY, United States
| | - Thambi Dorai
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, NY, United States
- Department of Urology, New York Medical College, Valhalla, NY, United States
| | - John T. Pinto
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, NY, United States
| | - Travis T. Denton
- Department Pharmaceutical Sciences, College of Pharmacy and Pharmaceutical Sciences, Washington State University Health Sciences Spokane, Spokane, WA, United States
- Department of Translational Medicine and Physiology, Elson S. Floyd College of Medicine, Washington State University Health Sciences Spokane, Spokane, WA, United States
- Steve Gleason Institute for Neuroscience, Washington State University Health Sciences Spokane, Spokane, WA, United States
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Biochemical and Biological Evaluation of an L-Asparaginase from Isolated Escherichia coli MF-107 as an Anti-Tumor Enzyme on MCF7 Cell Line. IRANIAN BIOMEDICAL JOURNAL 2022; 26:279-90. [PMID: 35690915 PMCID: PMC9432472 DOI: 10.52547/ibj.3494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Background: Methods: Results: Conclusion:
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Preparative Biocatalytic Synthesis of α-Ketoglutaramate. Int J Mol Sci 2021; 22:ijms222312748. [PMID: 34884551 PMCID: PMC8657959 DOI: 10.3390/ijms222312748] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 11/15/2021] [Accepted: 11/23/2021] [Indexed: 11/17/2022] Open
Abstract
α-Ketoglutaramate (KGM) is an underexamined metabolite of L-glutamine in the metabolic pathway of glutaminase II of α-ketoglutarate formation. Presumably, KGM may be a biomarker of hepatic encephalopathy and other hyperammonemic diseases. This metabolite is a substrate for the ω-amidase enzyme and is used to determine its activity in the study of the biochemistry of various types of cancer. However, the commercial unavailability of KGM hinders its widespread use. Methods for the preparative synthesis of KGM are known, but they either do not provide the proper yield or proper purity of the target product. In this work, a detailed description of the procedures is given that allows the production of KGM with a purity above 97% and a yield of the target product above 75% using L-amino acid oxidase from C. adamanteus as a catalyst of L-glutamine conversion. KGM can be obtained both in the form of a highly concentrated aqueous solution and in the form of crystals of sodium salt. The developed methods can be used both for scaling up the synthesis of KGM and for creating economical biocatalytic technologies for the production of other highly purified preparations.
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Epova EY, Shevelev AB, Shurubor YI, Cooper AJL, Biryukova YK, Bogdanova ES, Tyno YY, Lebedeva AA, Krasnikov BF. A novel efficient producer of human ω-amidase (Nit2) in Escherichia coli. Anal Biochem 2021; 632:114332. [PMID: 34391728 DOI: 10.1016/j.ab.2021.114332] [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: 04/10/2021] [Revised: 07/09/2021] [Accepted: 08/06/2021] [Indexed: 11/25/2022]
Abstract
Nit2/ω-amidase catalyzes the hydrolysis of α-ketoglutaramate (KGM, the α-keto acid analogue of glutamine) to α-ketoglutarate and ammonia. The enzyme also catalyzes the amide hydrolysis of monoamides of 4- and 5-C-dicarboxylates, including α-ketosuccinamate (KSM, the α-keto acid analogue of asparagine) and succinamate (SM). Here we describe an inexpensive procedure for high-yield expression of human Nit2 (hNit2) in Escherichia coli and purification of the expressed protein. This work includes: 1) the design of a genetic construct (pQE-Nit22) obtained from the previously described construct (pQE-Nit2) by replacing rare codons within an 81 bp-long DNA fragment "preferred" by E. coli near the translation initiation site; 2) methods for producing and maintaining the pQE-Nit22 construct; 3) purification of recombinant hNit2; and 4) activity measurements of the purified enzyme with KGM and SM. Important features of the hNit2 gene within the pQE-Nit22 construct are: 1) optimized codon composition, 2) the presence of an N-terminus His6 tag immediately after the initiating codon ATG (Met) that permits efficient purification of the end-product on a Ni-NTA-agarose column. We anticipate that the availability of high yield hNit2/ω-amidase will be helpful in elucidating the normal and pathological roles of this enzyme and in the design of specific inhibitors.
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Affiliation(s)
- Ekaterina Yu Epova
- Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, Moscow, Russia
| | - Alexei B Shevelev
- Vavilov Institute of General Genetics, Russian Academy of Sciences, Moscow, Russia
| | | | - Arthur J L Cooper
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, NY, 10595, USA
| | - Yulia K Biryukova
- Vavilov Institute of General Genetics, Russian Academy of Sciences, Moscow, Russia
| | - Elena S Bogdanova
- Vavilov Institute of General Genetics, Russian Academy of Sciences, Moscow, Russia; Plekhanov Russian University of Economics, Moscow, Russia
| | - Yaroslav Ya Tyno
- Vavilov Institute of General Genetics, Russian Academy of Sciences, Moscow, Russia
| | - Anna A Lebedeva
- Vavilov Institute of General Genetics, Russian Academy of Sciences, Moscow, Russia
| | - Boris F Krasnikov
- Centre for Strategic Planning of FMBA of the Russian Federation, Moscow, Russia; Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, NY, 10595, USA.
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11
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Kubicka A, Matczak K, Łabieniec-Watała M. More Than Meets the Eye Regarding Cancer Metabolism. Int J Mol Sci 2021; 22:9507. [PMID: 34502416 PMCID: PMC8430985 DOI: 10.3390/ijms22179507] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 08/20/2021] [Accepted: 08/30/2021] [Indexed: 12/14/2022] Open
Abstract
In spite of the continuous improvement in our knowledge of the nature of cancer, the causes of its formation and the development of new treatment methods, our knowledge is still incomplete. A key issue is the difference in metabolism between normal and cancer cells. The features that distinguish cancer cells from normal cells are the increased proliferation and abnormal differentiation and maturation of these cells, which are due to regulatory changes in the emerging tumour. Normal cells use oxidative phosphorylation (OXPHOS) in the mitochondrion as a major source of energy during division. During OXPHOS, there are 36 ATP molecules produced from one molecule of glucose, in contrast to glycolysis which provides an ATP supply of only two molecules. Although aerobic glucose metabolism is more efficient, metabolism based on intensive glycolysis provides intermediate metabolites necessary for the synthesis of nucleic acids, proteins and lipids, which are in constant high demand due to the intense cell division in cancer. This is the main reason why the cancer cell does not "give up" on glycolysis despite the high demand for energy in the form of ATP. One of the evolving trends in the development of anti-cancer therapies is to exploit differences in the metabolism of normal cells and cancer cells. Currently constructed therapies, based on cell metabolism, focus on the attempt to reprogram the metabolic pathways of the cell in such a manner that it becomes possible to stop unrestrained proliferation.
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Affiliation(s)
- Anna Kubicka
- Department of Medical Biophysics, Faculty of Biology and Environmental Protection, Institute of Biophysics, University of Lodz, Pomorska Street 141/143, 90-236 Lodz, Poland;
- Doctoral School of Exact and Natural Sciences, University of Lodz, Banacha Street 12/16, 90-237 Lodz, Poland
| | - Karolina Matczak
- Department of Medical Biophysics, Faculty of Biology and Environmental Protection, Institute of Biophysics, University of Lodz, Pomorska Street 141/143, 90-236 Lodz, Poland;
| | - Magdalena Łabieniec-Watała
- Department of Medical Biophysics, Faculty of Biology and Environmental Protection, Institute of Biophysics, University of Lodz, Pomorska Street 141/143, 90-236 Lodz, Poland;
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Silva Teixeira CS, Sousa SF, Cerqueira NMFSA. An Unsual Cys-Glu-Lys Catalytic Triad is Responsible for the Catalytic Mechanism of the Nitrilase Superfamily: A QM/MM Study on Nit2. Chemphyschem 2021; 22:796-804. [PMID: 33463886 DOI: 10.1002/cphc.202000751] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 01/13/2021] [Indexed: 12/29/2022]
Abstract
Nitrilase 2 (Nit2) is a representative member of the nitrilase superfamily that catalyzes the hydrolysis of α-ketosuccinamate into oxaloacetate. It has been associated with the metabolism of rapidly dividing cells like cancer cells. The catalytic mechanism of Nit2 employs a catalytic triad formed by Cys191, Glu81 and Lys150. The Cys191 and Glu81 play an active role during the catalytic process while the Lys150 is shown to play only a secondary role. The results demonstrate that the catalytic mechanism of Nit2 involves four steps. The nucleophilic attack of Cys191 to the α-ketosuccinamate, the formation of two tetrahedral enzyme adducts and the hydrolysis of a thioacyl-enzyme intermediate, from which results the formation of oxaloacetate and enzymatic turnover. The rate limiting step of the catalytic process is the formation of the first tetrahedral intermediate with a calculated activation free energy of 18.4 kcal/mol, which agrees very well with the experimental kcat (17.67 kcal/mol).
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Affiliation(s)
- Carla S Silva Teixeira
- UCIBIO@REQUIMTE, BioSIM, Departamento de Biomedicina, Faculdade de Medicina, Universidade do Porto, Porto, 4200-319, Portugal
| | - Sérgio F Sousa
- UCIBIO@REQUIMTE, BioSIM, Departamento de Biomedicina, Faculdade de Medicina, Universidade do Porto, Porto, 4200-319, Portugal
| | - Nuno M F S A Cerqueira
- UCIBIO@REQUIMTE, BioSIM, Departamento de Biomedicina, Faculdade de Medicina, Universidade do Porto, Porto, 4200-319, Portugal
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13
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The metabolic importance of the glutaminase II pathway in normal and cancerous cells. Anal Biochem 2020; 644:114083. [PMID: 33352190 DOI: 10.1016/j.ab.2020.114083] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 12/08/2020] [Accepted: 12/15/2020] [Indexed: 02/08/2023]
Abstract
In rapidly dividing cells, including many cancer cells, l-glutamine is a major energy source. Utilization of glutamine is usually depicted as: l-glutamine → l-glutamate (catalyzed by glutaminase isozymes; GLS1 and GLS2), followed by l-glutamate → α-ketoglutarate [catalyzed by glutamate-linked aminotransferases or by glutamate dehydrogenase (GDH)]. α-Ketoglutarate is a major anaplerotic component of the tricarboxylic acid (TCA) cycle. However, the glutaminase II pathway also converts l-glutamine to α-ketoglutarate. This pathway consists of a glutamine transaminase coupled to ω-amidase [Net reaction: l-Glutamine + α-keto acid + H2O → α-ketoglutarate + l-amino acid + NH4+]. This review focuses on the biological importance of the glutaminase II pathway, especially in relation to metabolism of cancer cells. Our studies suggest a component enzyme of the glutaminase II pathway, ω-amidase, is utilized by tumor cells to provide anaplerotic carbon. Inhibitors of GLS1 are currently in clinical trials as anti-cancer agents. However, this treatment will not prevent the glutaminase II pathway from providing anaplerotic carbon derived from glutamine. Specific inhibitors of ω-amidase, perhaps in combination with a GLS1 inhibitor, may provide greater therapeutic efficacy.
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14
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The metabolic importance of the overlooked asparaginase II pathway. Anal Biochem 2020; 644:114084. [PMID: 33347861 DOI: 10.1016/j.ab.2020.114084] [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: 09/30/2020] [Revised: 12/13/2020] [Accepted: 12/15/2020] [Indexed: 11/23/2022]
Abstract
The asparaginase II pathway consists of an asparagine transaminase [l-asparagine + α-keto acid ⇆ α-ketosuccinamate + l-amino acid] coupled to ω-amidase [α-ketosuccinamate + H2O → oxaloacetate + NH4+]. The net reaction is: l-asparagine + α-keto acid + H2O → oxaloacetate + l-amino acid + NH4+. Thus, in the presence of a suitable α-keto acid substrate, the asparaginase II pathway generates anaplerotic oxaloacetate at the expense of readily dispensable asparagine. Several studies have shown that the asparaginase II pathway is important in photorespiration in plants. However, since its discovery in rat tissues in the 1950s, this pathway has been almost completely ignored as a conduit for asparagine metabolism in mammals. Several mammalian transaminases can catalyze transamination of asparagine, one of which - alanine-glyoxylate aminotransferase type 1 (AGT1) - is important in glyoxylate metabolism. Glyoxylate is a precursor of oxalate which, in the form of its calcium salt, is a major contributor to the formation of kidney stones. Thus, transamination of glyoxylate with asparagine may be physiologically important for the removal of potentially toxic glyoxylate. Asparaginase has been the mainstay treatment for certain childhood leukemias. We suggest that an inhibitor of ω-amidase may potentiate the therapeutic benefits of asparaginase treatment.
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15
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Wang Y, Fan S, Yang M, Shi G, Hu S, Yin D, Zhang Y, Xu F. Evaluation of the mechanism of Danggui-Shaoyao-San in regulating the metabolome of nephrotic syndrome based on urinary metabonomics and bioinformatics approaches. JOURNAL OF ETHNOPHARMACOLOGY 2020; 261:113020. [PMID: 32592886 DOI: 10.1016/j.jep.2020.113020] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2019] [Revised: 05/22/2020] [Accepted: 05/24/2020] [Indexed: 06/11/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Danggui-Shaoyao-San (DSS), a well-known classic Traditional Chinese medicine (TCM) formula for enhancing Qi (vital energy and spirit), invigorating blood circulation and promoting diuresis, has been widely used in the treatment of nephrotic syndrome (NS). Previously, we have reported some protective effects of DSS against NS, but the in-depth mechanisms remain unclear. AIM OF THE STUDY In this study, an ultra performance liquid chromatography coupled with quadrupole-time-of-flight mass spectrometry (UPLC-Q/TOF-MS)-based urinary metabonomics coupled with bioinformatics method was employed to evaluate the mechanisms of DSS in treating NS from the perspective of metabolism. MATERIALS AND METHODS The rat models of NS were established using adriamycin injection. The regulative effects of DSS on NS in rats were first assessed by non-targeted metabonomics, which was based on UPLC-Q/TOF-MS. A series of target prediction models were used to predict the target of components identified in DSS and potential metabolites in NS, combined with the experimental results of metabonomics, to construct the biological network. RESULTS A total of 16 potential metabolites were screened in NS, of which 13 were significantly regulated by DSS. Metabolic pathway analysis showed that the therapeutic effect of DSS on NS was mainly involved in regulating the amino acid metabolism and energy metabolism. The component-target-metabolites-pathway network revealed 29 targets associated with metabolites that were linked to 27 components of DSS. Bioinformatics analysis showed that the potential targets have various molecular functions (especially serine-type endopeptidase inhibitor activity) and biological process (such as positive regulation of peptidyl-tyrosine phosphorylation or autophosphorylation). CONCLUSIONS The regulation of disrupted metabolic pathways and the relative targets may be the mechanism for DSS in the treatment of NS. Notably, metabonomics coupled with bioinformatics would be useful to explore the mechanism of DSS against NS and provide better insights on DSS for clinical use.
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Affiliation(s)
- Yunlai Wang
- School of Pharmacy, Anhui University of Chinese Medicine, Hefei, 230012, PR China; Key Laboratory of Chinese Medicine Formula of Anhui Province, Hefei, 230012, PR China.
| | - Shengnan Fan
- School of Pharmacy, Anhui University of Chinese Medicine, Hefei, 230012, PR China; Key Laboratory of Chinese Medicine Formula of Anhui Province, Hefei, 230012, PR China.
| | - Mo Yang
- School of Pharmacy, Anhui University of Chinese Medicine, Hefei, 230012, PR China; Key Laboratory of Chinese Medicine Formula of Anhui Province, Hefei, 230012, PR China.
| | - Gaoxiang Shi
- School of Pharmacy, Anhui University of Chinese Medicine, Hefei, 230012, PR China; Key Laboratory of Chinese Medicine Formula of Anhui Province, Hefei, 230012, PR China.
| | - Siyao Hu
- The Chinese University of Hong Kong (Shenzhen), Shenzhen, 518172, PR China.
| | - Dengke Yin
- School of Pharmacy, Anhui University of Chinese Medicine, Hefei, 230012, PR China; Key Laboratory of Chinese Medicine Formula of Anhui Province, Hefei, 230012, PR China.
| | - Yazhong Zhang
- Anhui Institute for Food and Drug Control, Hefei, 230051, PR China.
| | - Fan Xu
- School of Pharmacy, Anhui University of Chinese Medicine, Hefei, 230012, PR China; Key Laboratory of Chinese Medicine Formula of Anhui Province, Hefei, 230012, PR China.
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16
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Shen D, Kruger L, Deatherage T, Denton TT. Synthesis of α-Ketoglutaramic acid. Anal Biochem 2020; 607:113862. [PMID: 32771374 DOI: 10.1016/j.ab.2020.113862] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 06/23/2020] [Accepted: 07/06/2020] [Indexed: 12/27/2022]
Abstract
α-Ketoglutaramic acid (KGM, α-ketoglutaramate), also known as 2-oxoglutaramic acid (OGM, 2-oxoglutaramate), is a substrate of ω-amidase, also known as Nitrilase 2 (NIT2), and is essential for studying the canonical role of ω-amidase, as well as its role in multiple diseases. Until now, KGM used for biological studies has been prepared most often by the enzymatic oxidation of l-glutamine using snake venom l-amino acid oxidase, which provides KGM as an aqueous solution, containing by-products including 5-oxoproline and α-ketoglutarate. The enzymatic method for KGM preparation, therefore, cannot provide pure product or an accurate percent yield evaluation. Here, we report a synthetic method for the preparation of this important substrate, KGM, in 3 steps, from l-2-hydroxyglutaramic acid, in pure form, in 53% overall yield.
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Affiliation(s)
- Dunxin Shen
- Department of Pharmaceutical Sciences, College of Pharmacy and Pharmaceutical Sciences, Washington State University, Spokane, WA, 99201, United States
| | - Laken Kruger
- Department of Pharmaceutical Sciences, College of Pharmacy and Pharmaceutical Sciences, Washington State University, Spokane, WA, 99201, United States
| | - Tyler Deatherage
- Department of Pharmaceutical Sciences, College of Pharmacy and Pharmaceutical Sciences, Washington State University, Spokane, WA, 99201, United States
| | - Travis T Denton
- Department of Pharmaceutical Sciences, College of Pharmacy and Pharmaceutical Sciences, Washington State University, Spokane, WA, 99201, United States.
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17
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Thakur N, Sharma N, Kumar V, Bhalla TC. Computational Analysis of the Primary and Secondary Structure of Amidases in Relation to their pH Adaptation. CURR PROTEOMICS 2020. [DOI: 10.2174/1570164616666190718150627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
Amidases are ubiquitous enzymes and biological functions of these enzymes
vary widely. They are considered to be synergistically involved in the synthesis of a wide variety of
carboxylic acids, hydroxamic acids and hydrazides, which find applications in commodity chemicals
synthesis, pharmaceuticals agrochemicals and wastewater treatments.
Methods:
They hydrolyse a wide variety of amides (short-chain aliphatic amides, mid-chain amides,
arylamides, α-aminoamides and α-hydroxyamides) and can be grouped on the basis of their catalytic
site and preferred substrate. Despite their economic importance, we lack knowledge as to how these
amidases withstand elevated pH and temperature whereas others cannot.
Results:
The present study focuses on the statistical comparison between the acid-tolerant, alkali tolerant
and neutrophilic organisms. In silico analysis of amidases of acid-tolerant, alkali tolerant and neutrophilic
organisms revealed some striking trends as to how amino acid composition varies significantly.
Statistical analysis of primary and secondary structure revealed amino acid trends in amidases of
these three groups of bacteria. The abundance of isoleucine (Ile, I) in acid-tolerant and leucine (Leu, L)
in alkali tolerant showed the aliphatic amino acid dominance in extreme conditions of pH in acidtolerant
and alkali tolerant amidases.
Conclusion:
The present investigation insights physiochemical properties and dominance of some crucial
amino acid residues in the primary and secondary structure of some amidases from acid-tolerant,
alkali tolerant and neutrophilic microorganisms.
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Affiliation(s)
- Neerja Thakur
- Bioinformatics Centre, Himachal Pradesh University, Summer Hill, Shimla, Himachal Pradesh 171005, India
| | - Nikhil Sharma
- Bioinformatics Centre, Himachal Pradesh University, Summer Hill, Shimla, Himachal Pradesh 171005, India
| | - Vijay Kumar
- Department of Biotechnology, Himachal Pradesh University, Summer Hill, Shimla, Himachal Pradesh 171005, India
| | - Tek Chand Bhalla
- Department of Biotechnology, Himachal Pradesh University, Summer Hill, Shimla, Himachal Pradesh 171005, India
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18
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Bowsher RR, Henry DP. Purification, characterization and identification of rat brain cytosolic tyrosine transaminase as glutamine Transaminase-K. Neurochem Int 2019; 133:104653. [PMID: 31874188 DOI: 10.1016/j.neuint.2019.104653] [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: 08/06/2019] [Revised: 12/17/2019] [Accepted: 12/19/2019] [Indexed: 10/25/2022]
Abstract
The current study was undertaken to investigate the spectrum of tyrosine transaminases enzymes in a cytosolic fraction of rat brain and to specifically purify and characterize a previously identified cytosolic brain enzyme possessing tyrosine/glyoxylate transaminase activity. Based upon extensive biochemical and immunochemical characterization of purified brain tyrosine/glyoxylate transaminase, we concluded the purified enzyme is glutamine transaminase-K (EC 2.6.1.64). This conclusion was based on: 1.) a concurrent enrichment in the tyrosine/glyoxylate and glutamine/phenylpyruvate transaminase activities during purification, 2.) demonstration of a co-substrate specificity for amino acids and α-keto acids that was highly consistent with published information for glutamine transaminase-K, 3.) results from detailed kinetic analysis, 4.) glutamine was a potent inhibitor of in vitro tyrosine/glyoxylate transamination, 5.) biochemical characterization, including pH optimum of 8.5 and spectrophotometric analysis and 6.) immunoanalytical analysis using a specific antiserum to rat renal glutamine transaminase-k. In addition, immunochemical characterization of a crude soluble extract of whole brain suggests that the in vitro tyrosine transaminase activity for several different α-keto acid co-substrates likely reflect the activity of glutamine transaminase-K. In conclusion, this investigation confirmed the presence of multiple tyrosine transaminase enzymes in a cytosolic extract of rat brain. Moreover, we concluded glutamine transaminase-K represents a predominant cytosolic enzyme in rat brain that's capable of catalyzing in vitro transamination of p-tyrosine and other aromatic amino acids, including the neurotransmitter precursors L-dopa and 5-hydroxytryptophan. The purified transaminase possesses a broad co-substrate specificity with preferential reactivity with α-keto acids derived from neutral aliphatic and aromatic amino acids. Lastly, we identified a heterogeneous regional distribution of tyrosine/glyoxylate transaminase (glutamine transaminase-K) in rat brain with a significantly higher level of in vitro activity in cerebellum.
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Affiliation(s)
- Ronald R Bowsher
- B2S Life Sciences llc and the Departments of Biochemistry and Molecular Biology, Indianapolis, IN, 46202, USA.
| | - David P Henry
- Medicine, Pharmacology and Toxicology, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
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19
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Dorai T, Dorai B, Pinto JT, Grasso M, Cooper AJL. High Levels of Glutaminase II Pathway Enzymes in Normal and Cancerous Prostate Suggest a Role in 'Glutamine Addiction'. Biomolecules 2019; 10:biom10010002. [PMID: 31861280 PMCID: PMC7022959 DOI: 10.3390/biom10010002] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Accepted: 12/13/2019] [Indexed: 12/17/2022] Open
Abstract
Abstract: Many tumors readily convert l-glutamine to α-ketoglutarate. This conversion is almost invariably described as involving deamidation of l-glutamine to l-glutamate followed by a transaminase (or dehydrogenase) reaction. However, mammalian tissues possess another pathway for conversion of l-glutamine to α-ketoglutarate, namely the glutaminase II pathway: l-Glutamine is transaminated to α-ketoglutaramate, which is then deamidated to α-ketoglutarate by ω-amidase. Here we show that glutamine transaminase and ω-amidase specific activities are high in normal rat prostate. Immunohistochemical analyses revealed that glutamine transaminase K (GTK) and ω-amidase are present in normal and cancerous human prostate and that expression of these enzymes increases in parallel with aggressiveness of the cancer cells. Our findings suggest that the glutaminase II pathway is important in providing anaplerotic carbon to the tricarboxylic acid (TCA) cycle, closing the methionine salvage pathway, and in the provision of citrate carbon in normal and cancerous prostate. Finally, our data also suggest that selective inhibitors of GTK and/or ω-amidase may be clinically important for treatment of prostate cancer. In conclusion, the demonstration of a prominent glutaminase II pathway in prostate cancer cells and increased expression of the pathway with increasing aggressiveness of tumor cells provides a new perspective on 'glutamine addiction' in cancers.
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Affiliation(s)
- Thambi Dorai
- Department of Urology, New York Medical College, Valhalla, NY 10595, USA; (T.D.); (M.G.)
- Department of Biochemistry & Molecular Biology, New York Medical College, Valhalla, NY 10595, USA;
| | - Bhuvaneswari Dorai
- Department of Pathology, Montefiore-Nyack Hospital, Nyack, NY 10960, USA;
| | - John T. Pinto
- Department of Biochemistry & Molecular Biology, New York Medical College, Valhalla, NY 10595, USA;
| | - Michael Grasso
- Department of Urology, New York Medical College, Valhalla, NY 10595, USA; (T.D.); (M.G.)
| | - Arthur J. L. Cooper
- Department of Biochemistry & Molecular Biology, New York Medical College, Valhalla, NY 10595, USA;
- Correspondence: ; Tel.: +1-914-594-3330; Fax: +1-914-594-4058
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20
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Mostafa Y, Alrumman S, Alamri S, Hashem M, Al-izran K, Alfaifi M, Elbehairi SE, Taha T. Enhanced production of glutaminase-free l-asparaginase by marine Bacillus velezensis and cytotoxic activity against breast cancer cell lines. ELECTRON J BIOTECHN 2019. [DOI: 10.1016/j.ejbt.2019.10.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
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21
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Udupa S, Nguyen S, Hoang G, Nguyen T, Quinones A, Pham K, Asaka R, Nguyen K, Zhang C, Elgogary A, Jung JG, Xu Q, Fu J, Thomas AG, Tsukamoto T, Hanes J, Slusher BS, Cooper AJL, Le A. Upregulation of the Glutaminase II Pathway Contributes to Glutamate Production upon Glutaminase 1 Inhibition in Pancreatic Cancer. Proteomics 2019; 19:e1800451. [PMID: 31231915 PMCID: PMC6851409 DOI: 10.1002/pmic.201800451] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 06/07/2019] [Indexed: 12/18/2022]
Abstract
The targeting of glutamine metabolism specifically via pharmacological inhibition of glutaminase 1 (GLS1) has been translated into clinical trials as a novel therapy for several cancers. The results, though encouraging, show room for improvement in terms of tumor reduction. In this study, the glutaminase II pathway is found to be upregulated for glutamate production upon GLS1 inhibition in pancreatic tumors. Moreover, genetic suppression of glutamine transaminase K (GTK), a key enzyme of the glutaminase II pathway, leads to the complete inhibition of pancreatic tumorigenesis in vivo unveiling GTK as a new metabolic target for cancer therapy. These results suggest that current trials using GLS1 inhibition as a therapeutic approach targeting glutamine metabolism in cancer should take into account the upregulation of other metabolic pathways that can lead to glutamate production; one such pathway is the glutaminase II pathway via GTK.
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Affiliation(s)
- Sunag Udupa
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA.,Department of Chemical and Biomolecular Engineering, Johns Hopkins University Whiting School of Engineering, Baltimore, MD, 21218, USA
| | - Stephanie Nguyen
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Giang Hoang
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Tu Nguyen
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Addison Quinones
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Khoa Pham
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Ryoichi Asaka
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Kiet Nguyen
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Cissy Zhang
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Amira Elgogary
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Jin G Jung
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Qingguo Xu
- Department of Ophthalmology and Wilmer Eye Institute Center for Nanomedicine, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA.,Department of Pharmaceutics, Virginia Commonwealth University, Richmond, VA, 23298, USA
| | - Jie Fu
- Department of Ophthalmology and Wilmer Eye Institute Center for Nanomedicine, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Ajit G Thomas
- Johns Hopkins Drug Discovery, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Takashi Tsukamoto
- Johns Hopkins Drug Discovery, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA.,Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Justin Hanes
- Department of Ophthalmology and Wilmer Eye Institute Center for Nanomedicine, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA.,Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA.,Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA.,Department of Pharmacology and Molecular Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA.,Department of Chemical and Biomolecular Engineering, Johns Hopkins University Whiting School of Engineering, Baltimore, MD, 21218, USA
| | - Barbara S Slusher
- Johns Hopkins Drug Discovery, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA.,Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA.,Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA.,Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA.,Department of Psychiatry, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Arthur J L Cooper
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, NY, 10595, USA
| | - Anne Le
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA.,Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
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22
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The multifaceted contribution of α-ketoglutarate to tumor progression: An opportunity to exploit? Semin Cell Dev Biol 2019; 98:26-33. [PMID: 31175937 DOI: 10.1016/j.semcdb.2019.05.031] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 05/29/2019] [Accepted: 05/31/2019] [Indexed: 01/25/2023]
Abstract
The thriving field that constitutes cancer metabolism has unveiled some groundbreaking facts over the past two decades, at the heart of which is the TCA cycle and its intermediates. As such and besides its metabolic role, α-ketoglutarate was shown to withstand a wide range of physiological reactions from protection against oxidative stress, collagen and bone maintenance to development and immunity. Most importantly, it constitutes the rate-limiting substrate of 2-oxoglutarate-dependent dioxygenases family enzymes, which are involved in hypoxia sensing and in the shaping of cellular epigenetic landscape, two major drivers of oncogenic transformation. Based on literature reports, we hereby review the benefits of this metabolite as a possible novel adjuvant therapeutic opportunity to target tumor progression. This article is part of the special issue "Mitochondrial metabolic alterations in cancer cells and related therapeutic targets".
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23
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Li T, Huang S, Li J, Liu H, Wang W, Li N, Shi M, Tao S, Zhang S, Li Z, Wang J. Dynamic changes of postprandial plasma metabolites after intake of corn-soybean meal or casein-starch diets in growing pigs. J Anim Sci Biotechnol 2019; 10:48. [PMID: 31161037 PMCID: PMC6542062 DOI: 10.1186/s40104-019-0351-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 04/02/2019] [Indexed: 01/03/2023] Open
Abstract
Background Postprandial nutrients utilization and metabolism of a certain diet is a complicated process. The metabolic feature of pigs after intake of corn-soybean meal or casein-starch diets are largely unknown. Therefore, this study was conducted to investigate the dynamic postprandial changes of plasma metabolic profile using growing pigs using metabolomics. Methods Twenty-four growing pigs with average initial body weight (BW) about 30 kg were placed in metabolic cages and then fitted with precaval vein catheters. Pigs were fed daily 4% of initial body weight. Two experimental diets were included: (i) a starch-casein based purified diet (PD) and (ii) a common corn-soybean meal diet (CD). Plasma was collected before feeding and 0.5 h, 1 h, 2 h, 4 h, 8 h after feeding. Results In both diets, compared to prior to feeding, the concentrations of glucose, most amino acids, metabolites such as 5-aminopentanoic acid, pipecolic acid, ornithine and 5-hydroxy-L-tryptophan were significantly increased in plasma during the first hour, whereas the concentrations of plasma triglycerides, glutamate, glycine, palmitelaidic acid, 13-HODE and oleic acid were decreased in the first hour. Compared with PD group, concentration of plasma leucine and isoleucine declined at 30 min in CD group. Plasma linoleic acid, sphingosine and many dipeptides were significantly higher in pigs fed CD. Conclusion Most significant metabolic changes occurred during the first hour after feeding and then became relatively stable after 2 h in both diets. These results show a broad scope picture of postprandial changes in plasma metabolites after intake of PD and CD and could be a reference for further nutrition intervention as well as the design of nutritional studies. Electronic supplementary material The online version of this article (10.1186/s40104-019-0351-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Tiantian Li
- 1State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193 China
| | - Shimeng Huang
- 1State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193 China
| | - Juntao Li
- 1State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193 China
| | - Hu Liu
- 1State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193 China
| | - Wei Wang
- 1State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193 China
| | - Na Li
- 1State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193 China
| | - Meng Shi
- 1State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193 China
| | - Shiyu Tao
- 1State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193 China
| | - Shuai Zhang
- 1State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193 China
| | - Zhen Li
- 2State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing, 100193 China
| | - Junjun Wang
- 1State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193 China
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Alrumman SA, Mostafa YS, Al-Izran KA, Alfaifi MY, Taha TH, Elbehairi SE. Production and Anticancer Activity of an L-Asparaginase from Bacillus licheniformis Isolated from the Red Sea, Saudi Arabia. Sci Rep 2019; 9:3756. [PMID: 30842557 PMCID: PMC6403232 DOI: 10.1038/s41598-019-40512-x] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Accepted: 02/18/2019] [Indexed: 01/25/2023] Open
Abstract
Microbial L-asparaginase (ASNase) is an important anticancer agent that is used extensively worldwide. In this study, 40 bacterial isolates were obtained from the Red Sea of Saudi Arabia and screened for ASNase production using a qualitative rapid plate assay, 28 of which were producing large L-asparagine hydrolysis zones. The ASNase production of the immobilized bacterial cells was more favorable than that of freely suspended cells. A promising isolate, KKU-KH14, was identified by 16S rRNA gene sequencing as Bacillus licheniformis. Maximal ASNase production was achieved using an incubation period of 72 h, with an optimum of pH 6.5, an incubation temperature of 37 °C, an agitation rate 250 rpm, and with glucose and (NH4)2SO4 used as the carbon and nitrogen sources, respectively. The glutaminase activity was not detected in the ASNase preparations. The purified ASNase showed a final specific activity of 36.08 U/mg, and the molecular weight was found to be 37 kDa by SDS-PAGE analysis. The maximum activity and stability of the purified enzyme occurred at pH values of 7.5 and 8.5, respectively, with maximum activity at 37 °C and complete thermal stability at 70 °C for 1 h. The Km and Vmax values of the purified enzyme were 0.049995 M and of 45.45 μmol/ml/min, respectively. The anticancer activity of the purified ASNase showed significant toxic activity toward HepG-2 cells (IC50 11.66 µg/mL), which was greater than that observed against MCF-7 (IC50 14.55 µg/mL) and HCT-116 cells (IC50 17.02 µg/mL). The results demonstrated that the Red Sea is a promising biological reservoir, as shown by the isolation of B. licheniformis, which produces a glutaminase free ASNase and may be a potential candidate for further pharmaceutical use as an anticancer drug.
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Affiliation(s)
- S A Alrumman
- Department of Biology, College of Science, King Khalid University, P.O. Box 9004, Abha, 61413, Saudi Arabia.
| | - Y S Mostafa
- Department of Biology, College of Science, King Khalid University, P.O. Box 9004, Abha, 61413, Saudi Arabia
| | - Kholood A Al-Izran
- Department of Biology, College of Science, King Khalid University, P.O. Box 9004, Abha, 61413, Saudi Arabia
| | - M Y Alfaifi
- Department of Biology, College of Science, King Khalid University, P.O. Box 9004, Abha, 61413, Saudi Arabia
| | - T H Taha
- Environmental Biotechnology Department, Genetic Engineering and Biotechnology Research Institute, City of Scientific Research & Technological Applications, P.O. Box: 21934, Alexandria, Egypt
| | - S E Elbehairi
- Department of Biology, College of Science, King Khalid University, P.O. Box 9004, Abha, 61413, Saudi Arabia
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Ruan JJ, Yu Y, Hou W, Chen Z, Fang J, Zhang J, Ni M, Li D, Lu S, Rui J, Wu R, Zhang W, Ruan BH. Kidney-Type Glutaminase Inhibitor Hexylselen Selectively Kills Cancer Cells via a Three-Pronged Mechanism. ACS Pharmacol Transl Sci 2019; 2:18-30. [PMID: 32219214 DOI: 10.1021/acsptsci.8b00047] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Indexed: 12/26/2022]
Abstract
Tumor metabolism has been deeply investigated for cancer therapeutics. Here, we demonstrate that glutamine deficiency alone could not completely inhibit cancer cell growth and that many potent kidney-type glutaminase (KGA) inhibitors did not show satisfying in vivo efficacy. The potent KGA allosteric inhibitor, CB-839, resulted in up to 80% growth inhibition of all tested cell lines, whereas Hexylselen (CPD-3B), a KGA/glutamate dehydrogenase (GDH) inhibitor, showed essentially no toxicity to normal cells up to a 10 μM concentration and could completely inhibit the growth of many aggressive cell lines. Further analyses showed that CPD-3B targets not only KGA and GDH but also thioredoxin reductase (TrxR) and amidotransferase (GatCAB), which results in corresponding regulation of Akt/Erk/caspase-9 signaling pathways. In an aggressive liver cancer xenograft model, CPD-3B significantly reduced tumor size, caused massive tumor tissue damage, and prolonged survival rate. These provide important information for furthering the drug design of an effective anticancer KGA allosteric inhibitor.
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Affiliation(s)
- Jennifer Jin Ruan
- College of Pharmaceutical Science, Collaborative Innovation Center of Yangtza River Delta Region Green Pharmaceuticals, IDD & CB, Zhejiang University of Technology, Hangzhou 310014, China
| | - Yan Yu
- College of Pharmaceutical Science, Collaborative Innovation Center of Yangtza River Delta Region Green Pharmaceuticals, IDD & CB, Zhejiang University of Technology, Hangzhou 310014, China
| | - Wei Hou
- College of Pharmaceutical Science, Collaborative Innovation Center of Yangtza River Delta Region Green Pharmaceuticals, IDD & CB, Zhejiang University of Technology, Hangzhou 310014, China
| | - Zhao Chen
- College of Pharmaceutical Science, Collaborative Innovation Center of Yangtza River Delta Region Green Pharmaceuticals, IDD & CB, Zhejiang University of Technology, Hangzhou 310014, China
| | - Jinzhang Fang
- College of Pharmaceutical Science, Collaborative Innovation Center of Yangtza River Delta Region Green Pharmaceuticals, IDD & CB, Zhejiang University of Technology, Hangzhou 310014, China
| | - Jingjing Zhang
- College of Pharmaceutical Science, Collaborative Innovation Center of Yangtza River Delta Region Green Pharmaceuticals, IDD & CB, Zhejiang University of Technology, Hangzhou 310014, China
| | - Muowei Ni
- Center for Cancer Research, Zhejiang Cancer Hospital, Hangzhou 310022, PR China
| | - Di Li
- College of Pharmaceutical Science, Collaborative Innovation Center of Yangtza River Delta Region Green Pharmaceuticals, IDD & CB, Zhejiang University of Technology, Hangzhou 310014, China
| | - Shiying Lu
- College of Pharmaceutical Science, Collaborative Innovation Center of Yangtza River Delta Region Green Pharmaceuticals, IDD & CB, Zhejiang University of Technology, Hangzhou 310014, China
| | - Jingjing Rui
- College of Pharmaceutical Science, Collaborative Innovation Center of Yangtza River Delta Region Green Pharmaceuticals, IDD & CB, Zhejiang University of Technology, Hangzhou 310014, China
| | - Rui Wu
- College of Pharmaceutical Science, Collaborative Innovation Center of Yangtza River Delta Region Green Pharmaceuticals, IDD & CB, Zhejiang University of Technology, Hangzhou 310014, China
| | - Wei Zhang
- Department of Urology, Tongde Hospital of Zhejiang Province, Hangzhou 310012, China
| | - Benfang Helen Ruan
- College of Pharmaceutical Science, Collaborative Innovation Center of Yangtza River Delta Region Green Pharmaceuticals, IDD & CB, Zhejiang University of Technology, Hangzhou 310014, China
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26
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Glutamine Addiction and Therapeutic Strategies in Lung Cancer. Int J Mol Sci 2019; 20:ijms20020252. [PMID: 30634602 PMCID: PMC6359540 DOI: 10.3390/ijms20020252] [Citation(s) in RCA: 79] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 01/05/2019] [Accepted: 01/07/2019] [Indexed: 12/16/2022] Open
Abstract
Lung cancer cells are well-documented to rewire their metabolism and energy production networks to support rapid survival and proliferation. This metabolic reorganization has been recognized as a hallmark of cancer. The increased uptake of glucose and the increased activity of the glycolytic pathway have been extensively described. However, over the past years, increasing evidence has shown that lung cancer cells also require glutamine to fulfill their metabolic needs. As a nitrogen source, glutamine contributes directly (or indirectly upon conversion to glutamate) to many anabolic processes in cancer, such as the biosynthesis of amino acids, nucleobases, and hexosamines. It plays also an important role in the redox homeostasis, and last but not least, upon conversion to α-ketoglutarate, glutamine is an energy and anaplerotic carbon source that replenishes tricarboxylic acid cycle intermediates. The latter is generally indicated as glutaminolysis. In this review, we explore the role of glutamine metabolism in lung cancer. Because lung cancer is the leading cause of cancer death with limited curative treatment options, we focus on the potential therapeutic approaches targeting the glutamine metabolism in cancer.
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Qi Y, Zhao X, Huang D, Pan X, Yang Y, Zhao H, Hu H, Cheng G. Exploration of the Relationship between Intestinal Colostrum or Milk, and Serum Metabolites in Neonatal Calves by Metabolomics Analysis. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:7200-7208. [PMID: 29920084 DOI: 10.1021/acs.jafc.8b01621] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In contrast to colostral immunoglobulins, changes in metabolite composition of ingested colostrum in the gut have received little attention. Here, we characterized the metabolite profiles of colostrum and milk, ingested colostrum and milk, and serum of neonatal calves by liquid chromatography tandem-mass spectrometry and gas chromatography-mass spectrometry metabolomics approaches. Colostrum and milk underwent similar changes in metabolite profiles in the gut after being ingested. These changes were characterized by increases in methionine, glutamate, thymine, and phosphorylcholine. After ingestion, colostrum concentrations of several metabolites, such as γ-aminobutyric acid, glutamate, cinnamic acid, and thymine increased, whereas concentrations of d-ribose, and arginine decreased. These increases and decreases occurred in a time-dependent manner and were associated with alanine, aspartate, glutamate, and pyrimidine metabolism, and valine, leucine, and isoleucine biosynthesis, respectively. Meanwhile, similar changes in serum metabolites were also observed in neonatal calves fed colostrum, which implies that colostrum metabolites are transported across the small intestine and into the bloodstream. In addition, several metabolites of ingested milk were detected in the gut, and were also transferred to the bloodstream. These metabolites were related to phenylalanine, tyrosine, tryptophan, valine, leucine, and isoleucine biosynthesis, the citrate cycle, and histidine metabolism. These findings reveal that the serum metabolome of neonatal calves' changes as a result of ingesting colostrum, which can provide health-related benefits in early life.
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Affiliation(s)
- Yunxia Qi
- Institute of Animal Science and Veterinary Medicine , Anhui Academy of Agricultural Sciences , Hefei 230031 , China
| | - Xiaowei Zhao
- Institute of Animal Science and Veterinary Medicine , Anhui Academy of Agricultural Sciences , Hefei 230031 , China
| | - Dongwei Huang
- Institute of Animal Science and Veterinary Medicine , Anhui Academy of Agricultural Sciences , Hefei 230031 , China
| | - Xiaocheng Pan
- Institute of Animal Science and Veterinary Medicine , Anhui Academy of Agricultural Sciences , Hefei 230031 , China
| | - Yongxin Yang
- Institute of Animal Science and Veterinary Medicine , Anhui Academy of Agricultural Sciences , Hefei 230031 , China
| | - Huiling Zhao
- Institute of Animal Science and Veterinary Medicine , Anhui Academy of Agricultural Sciences , Hefei 230031 , China
| | - Han Hu
- Institute of Apicultural Research/Key Laboratory of Pollinating Insect Biology, Ministry of Agriculture , Chinese Academy of Agricultural Sciences , Beijing 100093 , China
| | - Guanglong Cheng
- Institute of Animal Science and Veterinary Medicine , Anhui Academy of Agricultural Sciences , Hefei 230031 , China
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Miyazaki T, Nagasaka H, Komatsu H, Inui A, Morioka I, Tsukahara H, Kaji S, Hirayama S, Miida T, Kondou H, Ihara K, Yagi M, Kizaki Z, Bessho K, Kodama T, Iijima K, Yorifuji T, Matsuzaki Y, Honda A. Serum Amino Acid Profiling in Citrin-Deficient Children Exhibiting Normal Liver Function During the Apparently Healthy Period. JIMD Rep 2018; 43:53-61. [PMID: 29654547 DOI: 10.1007/8904_2018_99] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Revised: 02/23/2018] [Accepted: 02/27/2018] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Citrin (mitochondrial aspartate-glutamate transporter) deficiency causes the failures in both carbohydrate-energy metabolism and the urea cycle, and the alterations in the serum levels of several amino acids in the stages of newborn (NICCD) and adult (CTLN2). However, the clinical manifestations are resolved between the NICCD and CTLN2, but the reasons are still unclear. This study evaluated the serum amino acid profile in citrin-deficient children during the healthy stage. METHODS Using HPLC-MS/MS analysis, serum amino acids were evaluated among 20 citrin-deficient children aged 5-13 years exhibiting normal liver function and 35 age-matched healthy controls. RESULTS The alterations in serum amino acids characterized in the NICCD and CTLN2 stages were not observed in the citrin-deficient children. Amino acids involved in the urea cycle, including arginine, ornithine, citrulline, and aspartate, were comparable in the citrin-deficient children to the respective control levels, but serum urea was twofold higher, suggestive of a functional urea cycle. The blood sugar level was normal, but glucogenic amino acids and glutamine were significantly decreased in the citrin-deficient children compared to those in the controls. In addition, significant increases of ketogenic amino acids, branched-chain amino acids (BCAAs), a valine intermediate 3-hydroxyisobutyrate, and β-alanine were also found in the citrin-deficient children. CONCLUSION The profile of serum amino acids in the citrin-deficient children during the healthy stage showed different characteristics from the NICCD and CTLN2 stages, suggesting that the failures in both urea cycle function and energy metabolism might be compensated by amino acid metabolism. SYNOPSIS In the citrin-deficient children during the healthy stage, the characteristics of serum amino acids, including decrease of glucogenic amino acids, and increase of ketogenic amino acids, BCAAs, valine intermediate, and β-alanine, were found by comparison to the age-matched healthy control children, and it suggested that the characteristic alteration of serum amino acids may be resulted from compensation for energy metabolism and ammonia detoxification.
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Affiliation(s)
- Teruo Miyazaki
- Division of Gastroenterology, Joint Research Center, Tokyo Medical University Ibaraki Medical Center, Ami, Ibaraki, Japan.
| | - Hironori Nagasaka
- Department of Pediatrics, Takarazuka City Hospital, Takarazuka, Hyogo, Japan
| | - Haruki Komatsu
- Department of Pediatrics, Toho University Sakura Medical Center, Chiba, Japan
| | - Ayano Inui
- Department of Pediatric Hepatology and Gastroenterology, Saiseikai Yokohamashi Tobu Hospital, Yokohama, Kanagawa, Japan
| | - Ichiro Morioka
- Department of Pediatrics, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan
| | - Hirokazu Tsukahara
- Department of Pediatrics, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Shunsaku Kaji
- Department of Pediatrics, Tsuyama-Chuo Hospital, Tsuyama, Okayama, Japan
| | - Satoshi Hirayama
- Department of Clinical Laboratory Medicine, Juntendo University School of Medicine, Tokyo, Japan
| | - Takashi Miida
- Department of Clinical Laboratory Medicine, Juntendo University School of Medicine, Tokyo, Japan
| | - Hiroki Kondou
- Department of Pediatrics, Kindai University Nara Hospital, Nara, Japan
| | - Kenji Ihara
- Department of Pediatrics, Kyushu University Graduate School of Medical Science, Fukuoka, Japan
- Department of Pediatrics, Faculty of Medicine, Oita University, Yufu, Oita, Japan
| | - Mariko Yagi
- Department of Pediatrics, Nikoniko House Medical and Welfare Center, Kobe, Hyogo, Japan
| | - Zenro Kizaki
- Department of Pediatrics, Japanese Red Cross Kyoto Daiichi Hospital, Kyoto, Japan
| | - Kazuhiko Bessho
- Department of Pediatrics, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Takahiro Kodama
- Department of Gastroenterology and Hepatology, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Kazumoto Iijima
- Department of Pediatrics, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan
| | - Tohru Yorifuji
- Division of Pediatric Endocrinology and Metabolism, Children's Medical Center, Osaka City General Hospital, Osaka, Japan
| | - Yasushi Matsuzaki
- Division of Gastroenterology, Joint Research Center, Tokyo Medical University Ibaraki Medical Center, Ami, Ibaraki, Japan
| | - Akira Honda
- Division of Gastroenterology, Joint Research Center, Tokyo Medical University Ibaraki Medical Center, Ami, Ibaraki, Japan
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29
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Shiromizu S, Kusunose N, Matsunaga N, Koyanagi S, Ohdo S. Optimizing the dosing schedule of l-asparaginase improves its anti-tumor activity in breast tumor-bearing mice. J Pharmacol Sci 2018; 136:228-233. [PMID: 29605274 DOI: 10.1016/j.jphs.2018.01.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Revised: 01/08/2018] [Accepted: 01/09/2018] [Indexed: 12/18/2022] Open
Abstract
Proliferation of acute lymphoblastic leukemic cells is nutritionally dependent on the external supply of asparagine. l-asparaginase, an enzyme hydrolyzing l-asparagine in blood, is used for treatment of acute lymphoblastic leukemic and other related blood cancers. Although previous studies demonstrated that l-asparaginase suppresses the proliferation of cultured solid tumor cells, it remains unclear whether this enzyme prevents the growth of solid tumors in vivo. In this study, we demonstrated the importance of optimizing dosing schedules for the anti-tumor activity of l-asparaginase in 4T1 breast tumor-bearing mice. Cultures of several types of murine solid tumor cells were dependent on the external supply of asparagine. Among them, we selected murine 4T1 breast cancer cells and implanted them into BALB/c female mice kept under standardized light/dark cycle conditions. The growth of 4T1 tumor cells implanted in mice was significantly suppressed by intravenous administration of l-asparaginase during the light phase, whereas its administration during the dark phase failed to show significant anti-tumor activity. Decreases in plasma asparagine levels due to the administration of l-asparaginase were closely related to the dosing time-dependency of its anti-tumor effects. These results suggest that the anti-tumor efficacy of l-asparaginase in breast tumor-bearing mice is improved by optimizing the dosing schedule.
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Affiliation(s)
- Shoya Shiromizu
- Department of Pharmaceutics, Faculty of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Naoki Kusunose
- Department of Pharmaceutics, Faculty of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Naoya Matsunaga
- Department of Pharmaceutics, Faculty of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan; Department of Glocal Healthcare, Faculty of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Satoru Koyanagi
- Department of Pharmaceutics, Faculty of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan; Department of Glocal Healthcare, Faculty of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Shigehiro Ohdo
- Department of Pharmaceutics, Faculty of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.
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30
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Abstract
Many potentially toxic electrophilic xenobiotics and some endogenous compounds are detoxified by conversion to the corresponding glutathione S-conjugate, which is metabolized to the N-acetylcysteine S-conjugate (mercapturate) and excreted. Some mercapturate pathway components, however, are toxic. Bioactivation (toxification) may occur when the glutathione S-conjugate (or mercapturate) is converted to a cysteine S-conjugate that undergoes a β-lyase reaction. If the sulfhydryl-containing fragment produced in this reaction is reactive, toxicity may ensue. Some drugs and halogenated workplace/environmental contaminants are bioactivated by this mechanism. On the other hand, cysteine S-conjugate β-lyases occur in nature as a means of generating some biologically useful sulfhydryl-containing compounds.
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31
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Krasnikov BF, Deryabina YI, Isakova EP, Biriukova IK, Shevelev AB, Antipov AN. New recombinant producer of human ω-amidase based on Escherichia coli. APPL BIOCHEM MICRO+ 2017. [DOI: 10.1134/s0003683817030115] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Hariharan VA, Denton TT, Paraszcszak S, McEvoy K, Jeitner TM, Krasnikov BF, Cooper AJL. The Enzymology of 2-Hydroxyglutarate, 2-Hydroxyglutaramate and 2-Hydroxysuccinamate and Their Relationship to Oncometabolites. BIOLOGY 2017; 6:biology6020024. [PMID: 28358347 PMCID: PMC5485471 DOI: 10.3390/biology6020024] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 03/10/2017] [Accepted: 03/13/2017] [Indexed: 12/17/2022]
Abstract
Many enzymes make "mistakes". Consequently, repair enzymes have evolved to correct these mistakes. For example, lactate dehydrogenase (LDH) and mitochondrial malate dehydrogenase (mMDH) slowly catalyze the reduction of 2-oxoglutarate (2-OG) to the oncometabolite l-2-hydroxyglutarate (l-2-HG). l-2-HG dehydrogenase corrects this error by converting l-2-HG to 2-OG. LDH also catalyzes the reduction of the oxo group of 2-oxoglutaramate (2-OGM; transamination product of l-glutamine). We show here that human glutamine synthetase (GS) catalyzes the amidation of the terminal carboxyl of both the l- and d- isomers of 2-HG. The reaction of 2-OGM with LDH and the reaction of l-2-HG with GS generate l-2-hydroxyglutaramate (l-2-HGM). We also show that l-2-HGM is a substrate of human ω-amidase. The product (l-2-HG) can then be converted to 2-OG by l-2-HG dehydrogenase. Previous work showed that 2-oxosuccinamate (2-OSM; transamination product of l-asparagine) is an excellent substrate of LDH. Finally, we also show that human ω-amidase converts the product of this reaction (i.e., l-2-hydroxysuccinamate; l-2-HSM) to l-malate. Thus, ω-amidase may act together with hydroxyglutarate dehydrogenases to repair certain "mistakes" of GS and LDH. The present findings suggest that non-productive pathways for nitrogen metabolism occur in mammalian tissues in vivo. Perturbations of these pathways may contribute to symptoms associated with hydroxyglutaric acidurias and to tumor progression. Finally, methods for the synthesis of l-2-HGM and l-2-HSM are described that should be useful in determining the roles of ω-amidase/4- and 5-C compounds in photorespiration in plants.
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Affiliation(s)
- Vivek A Hariharan
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, NY 10590, USA.
| | - Travis T Denton
- Department of Pharmaceutical Sciences, Washington State University, College of Pharmacy, Spokane, WA 99210-1495, USA.
| | - Sarah Paraszcszak
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, NY 10590, USA.
| | - Kyle McEvoy
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, NY 10590, USA.
| | - Thomas M Jeitner
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, NY 10590, USA.
| | - Boris F Krasnikov
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, NY 10590, USA.
| | - Arthur J L Cooper
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, NY 10590, USA.
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Zhu M, Fang J, Zhang J, Zhang Z, Xie J, Yu Y, Ruan JJ, Chen Z, Hou W, Yang G, Su W, Ruan BH. Biomolecular Interaction Assays Identified Dual Inhibitors of Glutaminase and Glutamate Dehydrogenase That Disrupt Mitochondrial Function and Prevent Growth of Cancer Cells. Anal Chem 2017; 89:1689-1696. [DOI: 10.1021/acs.analchem.6b03849] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Min Zhu
- School
of Pharmacy, Zhejiang University of Technology, Hangzhou, Zhejiang, China 310014
| | - Jinzhang Fang
- School
of Pharmacy, Zhejiang University of Technology, Hangzhou, Zhejiang, China 310014
| | - Jingjing Zhang
- School
of Pharmacy, Zhejiang University of Technology, Hangzhou, Zhejiang, China 310014
| | - Zheng Zhang
- School
of Pharmacy, Zhejiang University of Technology, Hangzhou, Zhejiang, China 310014
| | - Jianhui Xie
- School
of Pharmacy, Zhejiang University of Technology, Hangzhou, Zhejiang, China 310014
| | - Yan Yu
- School
of Pharmacy, Zhejiang University of Technology, Hangzhou, Zhejiang, China 310014
| | | | - Zhao Chen
- School
of Pharmacy, Zhejiang University of Technology, Hangzhou, Zhejiang, China 310014
| | - Wei Hou
- School
of Pharmacy, Zhejiang University of Technology, Hangzhou, Zhejiang, China 310014
| | - Gensheng Yang
- School
of Pharmacy, Zhejiang University of Technology, Hangzhou, Zhejiang, China 310014
| | - Weike Su
- School
of Pharmacy, Zhejiang University of Technology, Hangzhou, Zhejiang, China 310014
| | - Benfang Helen Ruan
- School
of Pharmacy, Zhejiang University of Technology, Hangzhou, Zhejiang, China 310014
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Kynurenine Aminotransferase Isozyme Inhibitors: A Review. Int J Mol Sci 2016; 17:ijms17060946. [PMID: 27314340 PMCID: PMC4926479 DOI: 10.3390/ijms17060946] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Revised: 06/08/2016] [Accepted: 06/10/2016] [Indexed: 12/22/2022] Open
Abstract
Kynurenine aminotransferase isozymes (KATs 1–4) are members of the pyridoxal-5’-phosphate (PLP)-dependent enzyme family, which catalyse the permanent conversion of l-kynurenine (l-KYN) to kynurenic acid (KYNA), a known neuroactive agent. As KATs are found in the mammalian brain and have key roles in the kynurenine pathway, involved in different categories of central nervous system (CNS) diseases, the KATs are prominent targets in the quest to treat neurodegenerative and cognitive impairment disorders. Recent studies suggest that inhibiting these enzymes would produce effects beneficial to patients with these conditions, as abnormally high levels of KYNA are observed. KAT-1 and KAT-3 share the highest sequence similarity of the isozymes in this family, and their active site pockets are also similar. Importantly, KAT-2 has the major role of kynurenic acid production (70%) in the human brain, and it is considered therefore that suitable inhibition of this isozyme would be most effective in managing major aspects of CNS diseases. Human KAT-2 inhibitors have been developed, but the most potent of them, chosen for further investigations, did not proceed in clinical studies due to the cross toxicity caused by their irreversible interaction with PLP, the required cofactor of the KAT isozymes, and any other PLP-dependent enzymes. As a consequence of the possibility of extensive undesirable adverse effects, it is also important to pursue KAT inhibitors that reversibly inhibit KATs and to include a strategy that seeks compounds likely to achieve substantial interaction with regions of the active site other than the PLP. The main purpose of this treatise is to review the recent developments with the inhibitors of KAT isozymes. This treatise also includes analyses of their crystallographic structures in complex with this enzyme family, which provides further insight for researchers in this and related studies.
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Structure of the PLP-Form of the Human Kynurenine Aminotransferase II in a Novel Spacegroup at 1.83 Å Resolution. Int J Mol Sci 2016; 17:446. [PMID: 27023527 PMCID: PMC4848902 DOI: 10.3390/ijms17040446] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 03/10/2016] [Accepted: 03/22/2016] [Indexed: 11/16/2022] Open
Abstract
Kynurenine aminotransferase II (KAT-II) is a 47 kDa pyridoxal phosphate (PLP)-dependent enzyme, active as a homodimer, which catalyses the transamination of the amino acids kynurenine (KYN) and 3-hydroxykynurenine (3-HK) in the tryptophan pathway, and is responsible for producing metabolites that lead to kynurenic acid (KYNA), which is implicated in several neurological diseases such as schizophrenia. In order to fully describe the role of KAT-II in the pathobiology of schizophrenia and other brain disorders, the crystal structure of full-length PLP-form hKAT-II was determined at 1.83 Å resolution, the highest available. The electron density of the active site reveals an aldimine linkage between PLP and Lys263, as well as the active site residues, which characterize the fold-type I PLP-dependent enzymes.
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Lu H, Kopcho L, Ghosh K, Witmer M, Parker M, Gupta S, Paul M, Krishnamurthy P, Laksmaiah B, Xie D, Tredup J, Zhang L, Abell LM. Development of a RapidFire mass spectrometry assay and a fluorescence assay for the discovery of kynurenine aminotransferase II inhibitors to treat central nervous system disorders. Anal Biochem 2016; 501:56-65. [PMID: 26874021 DOI: 10.1016/j.ab.2016.02.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Revised: 01/15/2016] [Accepted: 02/02/2016] [Indexed: 12/16/2022]
Abstract
Kynurenine aminotransferases convert kynurenine to kynurenic acid and play an important role in the tryptophan degradation pathway. Kynurenic acid levels in brain have been hypothesized to be linked to a number of central nervous system (CNS) disorders. Kynurenine aminotransferase II (KATII) has proven to be a key modulator of kynurenic acid levels in brain and, thus, is an attractive target to treat CNS diseases. A sensitive, high-throughput, label-free RapidFire mass spectrometry assay has been developed for human KATII. Unlike other assays, this method is directly applicable to KATII enzymes from different animal species, which allows us to select proper animal model(s) to evaluate human KATII inhibitors. We also established a coupled fluorescence assay for human KATII. The short assay time and kinetic capability of the fluorescence assay provide a useful tool for orthogonal inhibitor validation and mechanistic studies.
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Affiliation(s)
- Hao Lu
- Lead Discovery and Optimization, Bristol-Myers Squibb R&D, Pennington, NJ 08534, USA.
| | - Lisa Kopcho
- Lead Discovery and Optimization, Bristol-Myers Squibb R&D, Pennington, NJ 08534, USA
| | - Kaushik Ghosh
- Disease Sciences and Technology, Biocon Bristol-Myers Squibb R&D Centre, Bangalore, 560099, India
| | - Mark Witmer
- Protein Science, Bristol-Myers Squibb R&D, Princeton, NJ 08648, USA
| | - Michael Parker
- Discovery Chemistry, Bristol-Myers Squibb R&D, Wallingford, CT 06492, USA
| | - Sumit Gupta
- Disease Sciences and Technology, Biocon Bristol-Myers Squibb R&D Centre, Bangalore, 560099, India
| | - Marilyn Paul
- Disease Sciences and Technology, Biocon Bristol-Myers Squibb R&D Centre, Bangalore, 560099, India
| | - Prasad Krishnamurthy
- Disease Sciences and Technology, Biocon Bristol-Myers Squibb R&D Centre, Bangalore, 560099, India
| | - Basanth Laksmaiah
- Disease Sciences and Technology, Biocon Bristol-Myers Squibb R&D Centre, Bangalore, 560099, India
| | - Dianlin Xie
- Protein Science, Bristol-Myers Squibb R&D, Princeton, NJ 08648, USA
| | - Jeffrey Tredup
- Protein Science, Bristol-Myers Squibb R&D, Princeton, NJ 08648, USA
| | - Litao Zhang
- Lead Discovery and Optimization, Bristol-Myers Squibb R&D, Pennington, NJ 08534, USA
| | - Lynn M Abell
- Lead Discovery and Optimization, Bristol-Myers Squibb R&D, Pennington, NJ 08534, USA.
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