DOCSLIB.ORG

Nitrogen Metabolism in Haemonchus Contortus and Teladorsagia Circumcincta

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Nitrogen Metabolism in Haemonchus Contortus and Teladorsagia Circumcincta Copyright is owned by the Author of the thesis. Permission is given for a copy to be downloaded by an individual for the purpose of research and private study only. The thesis may not be reproduced elsewhere without the permission of the Author. Nitrogen Metabolism in Haemonchus contortus and Teladorsagia circumcincta A thesis presented In partial fulfilment of the requirements For the degree of DOCTOR OF PHILOSOPHY at Massey University Palmerston North New Zealand Sallah Umair 2012 Table of Contents Table of Contents ...................................................................................................................... i Abstract ...................................................................................................................................... vi Acknowledgements............................................................................................................. viii List of Figures ............................................................................................................................ x List of Tables ........................................................................................................................... xv List of Abbreviations ......................................................................................................... xvii Introduction ............................................................................................................................... 1 CHAPTER 1 (Literature Review) ................................................................................... 3 1. NITROGEN METABOLISM IN NEMATODES .......................................................... 4 1.1. NEMATODE NEUROTRANSMITTERS .................................................................. 4 1.2. GLUTATHIONE METOBOLISM ................................................................................ 5 1.3. CHITIN METABOLISM ................................................................................................. 6 1.4. CHORISMATE MUTASE .............................................................................................. 6 1.5. AMINO ACID METABOLISM IN NEMATODES .................................................. 7 1.5.1. GLUTAMATE METABOLISM ................................................................................ 8 1.5.1.1. Aminotransferases .................................................................................................. 8 1.5.1.2. Glutaminase ................................................................................................................ 9 1.5.1.3. Glutamine synthetase-Glutamate synthase (GS-GOGAT) pathway ...... 9 1.5.1.4. Glutamate dehydrogenase ................................................................................. 10 i 1.5.1.5. Gamma-amino butyric acid (GABA)............................................................... 12 1.5.2. ARGININE METABOLISM ....................................................................................... 1 1.5.2.1. Ornithine urea cycle (OUC) ............................................................................... 14 1.5.2.2. Ornithine synthesis .............................................................................................. 15 1.5.2.2.1. Arginase ................................................................................................................ 15 1.5.2.2.2. Arginine deiminase pathway ........................................................................ 16 1.5.2.2.3. Arginine dihydrolase pathway ..................................................................... 16 1.5.2.3. Nitric oxide synthesis .......................................................................................... 17 1.5.2.4. Polyamine synthesis ............................................................................................ 18 1.5.2.4.1. Polyamine synthesis by ornithine decarboxylase ................................ 18 1.5.2.4.2. Polyamine synthesis by arginine decarboxylase .................................. 19 1.5.2.5. Phosphagen synthesis ......................................................................................... 19 1.5.3. PROLINE METABOLISM ...................................................................................... 21 1.5.4. LYSINE METABOLISM .......................................................................................... 22 1.5.4.1. The α-amino adipic acid pathway .................................................................. 22 1.5.4.2. The pipecolate pathway ..................................................................................... 23 1.5.4.3. Non-mammalian pathways ............................................................................... 24 1.6. Conclusions .................................................................................................................. 24 Chapter II ................................................................................................................................ 26 Glutamate synthase, but not GABA shunt enzymes, contributes to nitrogen metabolism of the sheep abomasal nematode parasites Haemonchus contortus and Teladorsagia circumcincta ................................................................... 27 Chapter III .............................................................................................................................. 32 Molecular and biochemical characterisation of a Teladorsagia circumcincta glutamate dehydrogenase ................................................................................................. 33 ii Chapter IV .............................................................................................................................. 43 Nucleotide allosteric regulation of the glutamate dehydrogenases of Teladorsagia circumcincta and Haemonchus contortus ........................................ 44 Chapter V ................................................................................................................................ 52 Enzymes of the ornithine-proline-glutamate pathway in the sheep abomasal nematode parasites Haemonchus contortus and Teladorsagia circumcincta 53 Chapter VI .............................................................................................................................. 59 Arginine metabolism in the sheep abomasal nematode parasites Haemonchus contortus and Teladorsagia circumcincta ................................................................... 60 Chapter VII ............................................................................................................................. 72 Lysine catabolism in Haemonchus contortus and Teladorsagia circumcincta ..................................................................................................................................................... 73 Chapter VIII ........................................................................................................................... 79 GENERAL DISCUSSION ..................................................................................................... 80 8.1. LYSINE CATABOLISM ............................................................................................... 81 8.2. PROLINE METABOLISM .......................................................................................... 83 8.3. ARGININE METABOLISM........................................................................................ 84 8.3.1. Arginase ........................................................................................................................ 85 8.3.2. Polyamine Synthesis ................................................................................................ 86 8.4. GLUTAMATE METABOLISM ................................................................................. 88 8.4.1. Gaba Metabolism ...................................................................................................... 89 8.4.2. Glutamate Synthase (GOGAT) .............................................................................. 89 8.4.3. Glutamate Dehydrogenase (GDH) ...................................................................... 90 iii 8.4.3.1. H. contortus GDH ................................................................................................... 91 8.4.3.2. Nucleotide allosteric regulation ...................................................................... 92 8.4.3.3. Recombinant T. circumcincta GDH ................................................................. 92 8.5. METABOLIC DIFFERENCES IN ABOMASAL NEMATODES ...................... 93 8.5.1. Difference between parasite and host .............................................................. 93 8.5.1 Difference between life-cycle stages .................................................................. 95 8.5.2 Difference between parasite species ................................................................. 95 8.6. FUTURE WORK ........................................................................................................... 96 References ............................................................................................................................. 98 Appendix 1. Statements of contribution to doctoral thesis containing publications .......................................................................................................................... 116 Appendix 2. Parasitology ..............................................................................................
Load more

Recommended publications
  • On the Active Site Thiol of Y-Glutamylcysteine Synthetase
    Proc. Natl. Acad. Sci. USA Vol. 85, pp. 2464-2468, April 1988 Biochemistry On the active site thiol of y-glutamylcysteine synthetase: Relationships to catalysis, inhibition, and regulation (glutathione/cystamine/Escherichia coli/kidney/enzyme inactivation) CHIN-SHIou HUANG, WILLIAM R. MOORE, AND ALTON MEISTER Cornell University Medical College, Department of Biochemistry, 1300 York Avenue, New York, NY 10021 Contributed by Alton Meister, December 4, 1987 ABSTRACT y-Glutamylcysteine synthetase (glutamate- dithiothreitol, suggesting that cystamine forms a mixed cysteine ligase; EC 6.3.2.2) was isolated from an Escherichia disulfide between cysteamine and an enzyme thiol (15). coli strain enriched in the gene for this enzyme by recombinant Inactivation of the enzyme by the L- and D-isomers of DNA techniques. The purified enzyme has a specific activity of 3-amino-1-chloro-2-pentanone, as well as that by cystamine, 1860 units/mg and a molecular weight of 56,000. Comparison is prevented by L-glutamate (14). Treatment of the enzyme of the E. coli enzyme with the well-characterized rat kidney with cystamine prevents its interaction with the sulfoxi- enzyme showed that these enzymes have similar catalytic prop- mines. Titration of the enzyme with 5,5'-dithiobis(2- erties (apparent Km values, substrate specificities, turnover nitrobenzoate) reveals that the enzyme has a single exposed numbers). Both enzymes are feedback-inhibited by glutathione thiol that reacts with this reagent without affecting activity but not by y-glutamyl-a-aminobutyrylglycine; the data indicate (16). 5,5'-Dithiobis(2-nitrobenzoate) does not interact with that glutathione binds not only at the glutamate binding site but the thiol that reacts with cystamine.
    [Show full text]
  • The Janus-Like Role of Proline Metabolism in Cancer Lynsey Burke1,Innaguterman1, Raquel Palacios Gallego1, Robert G
    Burke et al. Cell Death Discovery (2020) 6:104 https://doi.org/10.1038/s41420-020-00341-8 Cell Death Discovery REVIEW ARTICLE Open Access The Janus-like role of proline metabolism in cancer Lynsey Burke1,InnaGuterman1, Raquel Palacios Gallego1, Robert G. Britton1, Daniel Burschowsky2, Cristina Tufarelli1 and Alessandro Rufini1 Abstract The metabolism of the non-essential amino acid L-proline is emerging as a key pathway in the metabolic rewiring that sustains cancer cells proliferation, survival and metastatic spread. Pyrroline-5-carboxylate reductase (PYCR) and proline dehydrogenase (PRODH) enzymes, which catalyze the last step in proline biosynthesis and the first step of its catabolism, respectively, have been extensively associated with the progression of several malignancies, and have been exposed as potential targets for anticancer drug development. As investigations into the links between proline metabolism and cancer accumulate, the complexity, and sometimes contradictory nature of this interaction emerge. It is clear that the role of proline metabolism enzymes in cancer depends on tumor type, with different cancers and cancer-related phenotypes displaying different dependencies on these enzymes. Unexpectedly, the outcome of rewiring proline metabolism also differs between conditions of nutrient and oxygen limitation. Here, we provide a comprehensive review of proline metabolism in cancer; we collate the experimental evidence that links proline metabolism with the different aspects of cancer progression and critically discuss the potential mechanisms involved. ● How is the rewiring of proline metabolism regulated Facts depending on cancer type and cancer subtype? 1234567890():,; 1234567890():,; 1234567890():,; 1234567890():,; ● Is it possible to develop successful pharmacological ● Proline metabolism is widely rewired during cancer inhibitor of proline metabolism enzymes for development.
    [Show full text]
  • Methionine Sulfoximine: a Novel Anti Inflammatory Agent
    Wayne State University Wayne State University Dissertations January 2018 Methionine Sulfoximine: A Novel Anti Inflammatory Agent Tyler Peters Wayne State University, [email protected] Follow this and additional works at: https://digitalcommons.wayne.edu/oa_dissertations Part of the Biochemistry Commons Recommended Citation Peters, Tyler, "Methionine Sulfoximine: A Novel Anti Inflammatory Agent" (2018). Wayne State University Dissertations. 2124. https://digitalcommons.wayne.edu/oa_dissertations/2124 This Open Access Dissertation is brought to you for free and open access by DigitalCommons@WayneState. It has been accepted for inclusion in Wayne State University Dissertations by an authorized administrator of DigitalCommons@WayneState. METHIONINE SULFOXIMINE: A NOVEL ANTI-INFLAMMATORY AGENT by TYLER J. PETERS DISSERTATION Submitted to the Graduate School of Wayne State University – School of Medicine Detroit, Michigan in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOHPY 2018 MAJOR: BIOCHEMISTRY & MOL. BIOLOGY Approved By: __________________________________________ Advisor Date DEDICATION This work is dedicated to my family. I wouldn’t have made it this far without your unconditional love and support. ii ACKNOWLEDGEMENTS Thank you Dr. Brusilow, I consider myself very fortunate for having the privilege of working in the laboratory of Dr. William S.A. Brusilow these past few years. Under his mentorship, my scientific autonomy was always respected, and my opinions were always valued with consideration. I am thankful for his guidance and support as an advisor; I truly admire his patience and envy his calm demeanor. He exemplifies scientific integrity, and his dedication to develop MSO has inspired me. I had never experienced consistent failure in any aspect of life before encountering scientific research; at times I felt that Dr.
    [Show full text]
  • Amino Acid Disorders 105
    AMINO ACID DISORDERS 105 Massaro, A. S. (1995). Trypanosomiasis. In Guide to Clinical tions in biological fluids relatively easy. These Neurology (J. P. Mohrand and J. C. Gautier, Eds.), pp. 663– analyzers separate amino acids either by ion-ex- 667. Churchill Livingstone, New York. Nussenzweig, V., Sonntag, R., Biancalana, A., et al. (1953). Ac¸a˜o change chromatography or by high-pressure liquid de corantes tri-fenil-metaˆnicos sobre o Trypanosoma cruzi in chromatography. The results are plotted as a graph vitro: Emprego da violeta de genciana na profilaxia da (Fig. 1). The concentration of each amino acid can transmissa˜o da mole´stia de chagas por transfusa˜o de sangue. then be calculated from the size of the corresponding O Hospital (Rio de Janeiro) 44, 731–744. peak on the graph. Pagano, M. A., Segura, M. J., DiLorenzo, G. A., et al. (1999). Cerebral tumor-like American trypanosomiasis in Most amino acid disorders can be diagnosed by acquired immunodeficiency syndrome. Ann. Neurol. 45, measuring the concentrations of amino acids in 403–406. blood plasma; however, some disorders of amino Rassi, A., Trancesi, J., and Tranchesi, B. (1982). Doenc¸ade acid transport are more easily recognized through the Chagas. In Doenc¸as Infecciosas e Parasita´rias (R. Veroesi, Ed.), analysis of urine amino acids. Therefore, screening 7th ed., pp. 674–712. Guanabara Koogan, Sa˜o Paulo, Brazil. Spina-Franc¸a, A., and Mattosinho-Franc¸a, L. C. (1988). for amino acid disorders is best done using both South American trypanosomiasis (Chagas’ disease). In blood and urine specimens. Occasionally, analysis of Handbook of Clinical Neurology (P.
    [Show full text]
  • Yeast Genome Gazetteer P35-65
    gazetteer Metabolism 35 tRNA modification mitochondrial transport amino-acid metabolism other tRNA-transcription activities vesicular transport (Golgi network, etc.) nitrogen and sulphur metabolism mRNA synthesis peroxisomal transport nucleotide metabolism mRNA processing (splicing) vacuolar transport phosphate metabolism mRNA processing (5’-end, 3’-end processing extracellular transport carbohydrate metabolism and mRNA degradation) cellular import lipid, fatty-acid and sterol metabolism other mRNA-transcription activities other intracellular-transport activities biosynthesis of vitamins, cofactors and RNA transport prosthetic groups other transcription activities Cellular organization and biogenesis 54 ionic homeostasis organization and biogenesis of cell wall and Protein synthesis 48 plasma membrane Energy 40 ribosomal proteins organization and biogenesis of glycolysis translation (initiation,elongation and cytoskeleton gluconeogenesis termination) organization and biogenesis of endoplasmic pentose-phosphate pathway translational control reticulum and Golgi tricarboxylic-acid pathway tRNA synthetases organization and biogenesis of chromosome respiration other protein-synthesis activities structure fermentation mitochondrial organization and biogenesis metabolism of energy reserves (glycogen Protein destination 49 peroxisomal organization and biogenesis and trehalose) protein folding and stabilization endosomal organization and biogenesis other energy-generation activities protein targeting, sorting and translocation vacuolar and lysosomal
    [Show full text]
  • Amino Acid Disorders
    471 Review Article on Inborn Errors of Metabolism Page 1 of 10 Amino acid disorders Ermal Aliu1, Shibani Kanungo2, Georgianne L. Arnold1 1Children’s Hospital of Pittsburgh, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA; 2Western Michigan University Homer Stryker MD School of Medicine, Kalamazoo, MI, USA Contributions: (I) Conception and design: S Kanungo, GL Arnold; (II) Administrative support: S Kanungo; (III) Provision of study materials or patients: None; (IV) Collection and assembly of data: E Aliu, GL Arnold; (V) Data analysis and interpretation: None; (VI) Manuscript writing: All authors; (VII) Final approval of manuscript: All authors. Correspondence to: Georgianne L. Arnold, MD. UPMC Children’s Hospital of Pittsburgh, 4401 Penn Avenue, Suite 1200, Pittsburgh, PA 15224, USA. Email: [email protected]. Abstract: Amino acids serve as key building blocks and as an energy source for cell repair, survival, regeneration and growth. Each amino acid has an amino group, a carboxylic acid, and a unique carbon structure. Human utilize 21 different amino acids; most of these can be synthesized endogenously, but 9 are “essential” in that they must be ingested in the diet. In addition to their role as building blocks of protein, amino acids are key energy source (ketogenic, glucogenic or both), are building blocks of Kreb’s (aka TCA) cycle intermediates and other metabolites, and recycled as needed. A metabolic defect in the metabolism of tyrosine (homogentisic acid oxidase deficiency) historically defined Archibald Garrod as key architect in linking biochemistry, genetics and medicine and creation of the term ‘Inborn Error of Metabolism’ (IEM). The key concept of a single gene defect leading to a single enzyme dysfunction, leading to “intoxication” with a precursor in the metabolic pathway was vital to linking genetics and metabolic disorders and developing screening and treatment approaches as described in other chapters in this issue.
    [Show full text]
  • Characterization of the Scavenger Cell Proteome in Mouse and Rat Liver
    Biol. Chem. 2021; 402(9): 1073–1085 Martha Paluschinski, Cheng Jun Jin, Natalia Qvartskhava, Boris Görg, Marianne Wammers, Judith Lang, Karl Lang, Gereon Poschmann, Kai Stühler and Dieter Häussinger* Characterization of the scavenger cell proteome in mouse and rat liver + https://doi.org/10.1515/hsz-2021-0123 The data suggest that the population of perivenous GS Received January 25, 2021; accepted July 4, 2021; scavenger cells is heterogeneous and not uniform as previ- published online July 30, 2021 ously suggested which may reflect a functional heterogeneity, possibly relevant for liver regeneration. Abstract: The structural-functional organization of ammonia and glutamine metabolism in the liver acinus involves highly Keywords: glutaminase; glutamine synthetase; liver specialized hepatocyte subpopulations like glutamine syn- zonation; proteomics; scavenger cells. thetase (GS) expressing perivenous hepatocytes (scavenger cells). However, this cell population has not yet been char- acterized extensively regarding expression of other genes and Introduction potential subpopulations. This was investigated in the present study by proteome profiling of periportal GS-negative and There is a sophisticated structural-functional organization in perivenous GS-expressing hepatocytes from mouse and rat. the liver acinus with regard to ammonium and glutamine Apart from established markers of GS+ hepatocytes such as metabolism (Frieg et al. 2021; Gebhardt and Mecke 1983; glutamate/aspartate transporter II (GLT1) or ammonium Häussinger 1983, 1990). Periportal hepatocytes express en- transporter Rh type B (RhBG), we identified novel scavenger zymes required for urea synthesis such as the rate-controlling cell-specific proteins like basal transcription factor 3 (BTF3) enzyme carbamoylphosphate synthetase 1 (CPS1) and liver- and heat-shock protein 25 (HSP25).
    [Show full text]
  • Low Proline Diet in Type I Hyperprolinaemia
    Arch Dis Child: first published as 10.1136/adc.46.245.72 on 1 February 1971. Downloaded from Archives of Disease in Childhood, 1971, 46, 72. Low Proline Diet in Type I Hyperprolinaemia J. T. HARRIES, A. T. PIESOWICZ,* J. W. T. SEAKINS, D. E. M. FRANCIS, and 0. H. WOLFF From The Hospital for Sick Children, and the Institute of Child Health, University of London Harries, J. T., Piesowicz, A. T., Seakins, J. W. T., Francis, D. E. M., and Wolff, 0. H. (1971). Archives of Disease in Childhood, 46, 72. Low proline diet in type I hyperprolinaemia. A diagnosis of Type I hyperprolinaemia was made in a 7-month-old infant who presented with hypocalcaemic convulsions and malabsorp- tion. The plasma levels of proline were grossly raised and the urinary excretion of proline, hydroxyproline, and glycine was increased; neurological development was delayed and there were associated abnormalities of the electroencephalogram, renal tract, and bones. Restriction of dietary proline at the age of 9 months resulted in a prompt fall of plasma levels of proline to normal, and a low proline diet was continued until the age of 27 months when persistence of the biochemical defect was shown. During the period of dietary treatment, growth was satisfactory, mental development improved, and the electroencephalogram, and the renal, skeletal, and intestinal abnormalities disappeared. Proline should be regarded as a 'semi-essential' amino acid in the growing infant. Hyperprolinaemia, appearing in several members balance can be maintained on a proline-free diet copyright. of a family was first described by Scriver, Schafer, (Rose et al., 1955), and therefore the amino acid is and Efron in 1961.
    [Show full text]
  • The Journal of Nutrition 1968 Volume 95 No.1
    THE JOURNAL OF NUTRITION* OFFICIAL ORGAN OF THE AMERICAN INSTITUTE OF NUTRITION R i c h a r d H . B a r n e s , Editor Graduate School of Nutrition Cornell University, Savage Hall Ithaca, New York H a r o l d H . W i l l i a m s E. N e i g e T o d h u n t e r Associate Editor Biographical Editor EDITORIAL BOARD S a m u e l J . F o m o n W i l l i a m N. P e a r s o n M . K . H o r w i t t P a u l M . N e w b e r n e F. H. K r a t z e r K e n d a l l W . K i n g B o y d L. O’D e l l H. N. M u n r o H e r b e r t P . S a r e t t H. E. S a u b e r l i c h D o r i s H o w e s C a l l o w a y G e o r g e G . G r a h a m R o s l y n B . A l f i n -S l a t e r J . M . B e l l W i l l i a m G . H o e k s t r a G e o r g e H .
    [Show full text]
  • Resolution of Carbon Metabolism and Sulfur-Oxidation Pathways of Metallosphaera Cuprina Ar-4 Via Comparative Proteomics
    JOURNAL OF PROTEOMICS 109 (2014) 276– 289 Available online at www.sciencedirect.com ScienceDirect www.elsevier.com/locate/jprot Resolution of carbon metabolism and sulfur-oxidation pathways of Metallosphaera cuprina Ar-4 via comparative proteomics Cheng-Ying Jianga, Li-Jun Liua, Xu Guoa, Xiao-Yan Youa, Shuang-Jiang Liua,c,⁎, Ansgar Poetschb,⁎⁎ aState Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, PR China bPlant Biochemistry, Ruhr University Bochum, Bochum, Germany cEnvrionmental Microbiology and Biotechnology Research Center, Institute of Microbiology, Chinese Academy of Sciences, Beijing, PR China ARTICLE INFO ABSTRACT Article history: Metallosphaera cuprina is able to grow either heterotrophically on organics or autotrophically Received 16 March 2014 on CO2 with reduced sulfur compounds as electron donor. These traits endowed the species Accepted 6 July 2014 desirable for application in biomining. In order to obtain a global overview of physiological Available online 14 July 2014 adaptations on the proteome level, proteomes of cytoplasmic and membrane fractions from cells grown autotrophically on CO2 plus sulfur or heterotrophically on yeast extract Keywords: were compared. 169 proteins were found to change their abundance depending on growth Quantitative proteomics condition. The proteins with increased abundance under autotrophic growth displayed Bioleaching candidate enzymes/proteins of M. cuprina for fixing CO2 through the previously identified Autotrophy 3-hydroxypropionate/4-hydroxybutyrate cycle and for oxidizing elemental sulfur as energy Heterotrophy source. The main enzymes/proteins involved in semi- and non-phosphorylating Entner– Industrial microbiology Doudoroff (ED) pathway and TCA cycle were less abundant under autotrophic growth. Also Extremophile some transporter proteins and proteins of amino acid metabolism changed their abundances, suggesting pivotal roles for growth under the respective conditions.
    [Show full text]
  • Proline Metabolism in Glucagon Treated Rats
    PROLINE CATABOLISM IN LIVER by © Michael Roland Haslett A thesis submitted to the School of Graduate Studies in partial fulfilment of the requirements for the degree of Master of Science Department of Biochemistry Memorial University of Newfoundland and Labrador 2009 St. John's Newfoundland and Labrador, Canada Abstract The goal of this work was to localize one of the enzymes involved in proline oxidation, 111-pyrroline-5-carboxylate dehydrogenase (P5CDh) and to gain an understanding of the factors affecting proline catabolism in rat liver. In this regard we performed a systematic subcellular localization for P5CDh and studied proline catabolism in response to dietary protein and exogenous glucagon. Our results indicate that P5CDh is located solely in mitochondria in rat liver. With respect to factors affecting proline catabolism we observed that rats fed a diet containing excess protein (45% casein) display a 1.5 fold increase in activity of P5CDh and proline oxidase (PO), and a 40% increase in flux through the pathway resulting in complete oxidation of proline in isolated mitochondria. We also observed that rats administered exogenous glucagon exhibit a 2 fold increase in PO activity and a 1.5 fold increase in P5CDh activity, and a 2 fold increase in flux through the pathway resulting in complete oxidation of proline in 14 14 isolated mitochondria. C02 production from C-proline in the isolated nonrecirculating perfused rat liver was also elevated 2 fold in the glucagon treated rat. We also studied the transport of proline into isolated hepatocytes and observed a 1.5 fold increase in the transport of proline in rats given exogenous glucagon.
    [Show full text]
  • Phosphine Stabilizers for Oxidoreductase Enzymes
    Europäisches Patentamt *EP001181356B1* (19) European Patent Office Office européen des brevets (11) EP 1 181 356 B1 (12) EUROPEAN PATENT SPECIFICATION (45) Date of publication and mention (51) Int Cl.7: C12N 9/02, C12P 7/00, of the grant of the patent: C12P 13/02, C12P 1/00 07.12.2005 Bulletin 2005/49 (86) International application number: (21) Application number: 00917839.3 PCT/US2000/006300 (22) Date of filing: 10.03.2000 (87) International publication number: WO 2000/053731 (14.09.2000 Gazette 2000/37) (54) Phosphine stabilizers for oxidoreductase enzymes Phosphine Stabilisatoren für oxidoreduktase Enzymen Phosphines stabilisateurs des enzymes ayant une activité comme oxidoreducase (84) Designated Contracting States: (56) References cited: DE FR GB NL US-A- 5 777 008 (30) Priority: 11.03.1999 US 123833 P • ABRIL O ET AL.: "Hybrid organometallic/enzymatic catalyst systems: (43) Date of publication of application: Regeneration of NADH using dihydrogen" 27.02.2002 Bulletin 2002/09 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY., vol. 104, no. 6, 1982, pages 1552-1554, (60) Divisional application: XP002148357 DC US cited in the application 05021016.0 • BHADURI S ET AL: "Coupling of catalysis by carbonyl clusters and dehydrigenases: (73) Proprietor: EASTMAN CHEMICAL COMPANY Redution of pyruvate to L-lactate by dihydrogen" Kingsport, TN 37660 (US) JOURNAL OF THE AMERICAN CHEMICAL SOCIETY., vol. 120, no. 49, 11 October 1998 (72) Inventors: (1998-10-11), pages 12127-12128, XP002148358 • HEMBRE, Robert, T. DC US cited in the application Johnson City, TN 37601 (US) • OTSUKA K: "Regeneration of NADH and ketone • WAGENKNECHT, Paul, S. hydrogenation by hydrogen with the San Jose, CA 95129 (US) combination of hydrogenase and alcohol • PENNEY, Jonathan, M.
    [Show full text]