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Sproat BS, Iribarren A, Beijer B, Pieles U, Lamond AI. 2′-O-alkyloligoribonucleotides Synthesis and Applications in Studying RNA Splicing. ACTA ACUST UNITED AC 2007. [DOI: 10.1080/07328319108046433] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Brian S. Sproat
- a EMBL , Meyerhofstrasse 1, D-6900 , Heidelberg , West Germany
| | | | - Barbro Beijer
- a EMBL , Meyerhofstrasse 1, D-6900 , Heidelberg , West Germany
| | - Uwe Pieles
- a EMBL , Meyerhofstrasse 1, D-6900 , Heidelberg , West Germany
| | - Angus I. Lamond
- a EMBL , Meyerhofstrasse 1, D-6900 , Heidelberg , West Germany
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2
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Isa Y, Tsuge H, Hayakawa T. Effect of vitamin B6 deficiency on S-adenosylhomocysteine hydrolase activity as a target point for methionine metabolic regulation. J Nutr Sci Vitaminol (Tokyo) 2007; 52:302-6. [PMID: 17190099 DOI: 10.3177/jnsv.52.302] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The objective of this study was to clarify the relationship between the accumulation of S-adenosylhomocysteine (SAH) and the change in the SAH hydrolase activity in vitamin B6 (B6). Male Wistar rats were fed a control diet (control and pair-fed groups) or B6-free diet (B6-deficient group) for 5 wk. Although the SAH-synthetic activity of SAH hydrolase significantly increased in the B6-deficient group, SAH-hydrolytic activity of SAH hydrolase showed no significant difference in the liver among the three groups. On the other hand, SAH hydrolase mRNA in the liver did not show any significant change. Thus, the accumulation of SAH would be due to the increased SAH-synthetic activity of SAH hydrolase. The disturbed methionine metabolism by B6-deficiency, such as a significant increase of plasma homocysteine, might induce the activation of SAH hydrolase in the direction of SAH synthesis.
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Affiliation(s)
- Yasuka Isa
- The United Graduate School of Agricultural Science, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
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3
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Tavenier M, Skladanowski AC, De Abreu RA, de Jong JW. Kinetics of adenylate metabolism in human and rat myocardium. BIOCHIMICA ET BIOPHYSICA ACTA 1995; 1244:351-6. [PMID: 7599155 DOI: 10.1016/0304-4165(95)98595-c] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Pathways producing and converting adenosine have hardly been investigated in human heart, contrasting work in other species. We compared the kinetics of enzymes associated with purine degradation and salvage in human and rat heart cytoplasm assaying for adenosine deaminase, nucleoside phosphorylase, xanthine oxidoreductase, AMP deaminase, AMP- and IMP-specific 5'-nucleotidases, adenosine kinase and hypoxanthine guanine phosphoribosyltransferase (HGPRT). Xanthine oxidoreductase was not detectable in human heart. The Km-values of the AMP-catabolizing enzymes were 2-5 times higher in human heart; the substrate affinity of the other enzymes was in the same order of magnitude in both species. The maximal activity (Vmax) of adenosine kinase was the same in both species, but HGPRT in man was only 12% of that in the rat. For human heart the Vmax-values of adenosine deaminase, nucleoside phosphorylase, AMP- and IMP-specific 5'-nucleotidases, and AMP deaminase were 25-50% of those for rat heart. We conclude that human heart is less geared to purine catabolism than rat heart as is evident from the lower activities of the catabolic enzymes. Maintenance of the nucleotide pool may thus play a more important role in human heart.
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Affiliation(s)
- M Tavenier
- Cardiochemical Laboratory, Thoraxcenter, Erasmus University Rotterdam, Netherlands
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4
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Flores JR, Alvarez JMF. Adsorptive stripping square-wave voltammetric behavior of the enzyme adenosine deaminase. ELECTROANAL 1992. [DOI: 10.1002/elan.1140040313] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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5
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Niedzwicki JG, Abernethy DR. Structure-activity relationship of ligands of human plasma adenosine deaminase2. Biochem Pharmacol 1991; 41:1615-24. [PMID: 2043151 DOI: 10.1016/0006-2952(91)90162-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Diethylaminoethyl-cellulose chromatography was used to separate the two isoenzymes of adenosine deaminase (EC3.5.4.4), adenosine deaminase1 (ADA1) and adenosine deaminase2 (ADA2), in human plasma. One hundred and fifteen purine base, nucleoside, and nucleotide analogs were tested as inhibitors of this partially purified preparation of ADA2. Coformycin and 2'-deoxycoformycin were by far the most potent inhibitors of this isoenzyme (apparent Ki values 20 and 19 nM, respectively). ADA2 was also inhibited by nebularine (apparent Ki 1.5 mM) but was resistant to the potent ADA1 inhibitor (+)-erythro-9(2-S-hydroxy-3-R-nonyl)adenine. alpha-D-Adenosine also inhibited ADA2, as did several halogenated purine and adenine base analogs. Structural requirements for the binding of purine analogs to ADA2 are presented which provide a general basis for the design of specific inhibitors of ADA2. Such inhibitors may be useful in studies designed to provide an understanding of the physiological role of ADA2 both in the normal state and in diseases such as human immunodeficiency virus-1 infection where levels in plasma are increased markedly.
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Affiliation(s)
- J G Niedzwicki
- Division of Clinical Pharmacology, Brown University, Providence, Rhode Island
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6
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Gustafsson LE, Persson MG, Ohlén A, Hedqvist P, Lindbom L. Adenosine modulation of resting vascular tone in rabbit skeletal muscle. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 1990; 341:444-9. [PMID: 2366879 DOI: 10.1007/bf00176338] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The effects of adenosine and adenosine antagonists on arteriolar vessel diameters were studied in the rabbit tenuissimus muscle in situ by means of intravital microscopy. Topically applied adenosine dose-dependently dilated transverse and terminal arterioles, an effect which was competitively antagonized by alkylxanthines. Topically applied alkylxanthines per se evoked dose-dependent vasoconstriction with the same potency order as for their adenosine antagonism. Furthermore, the concentrations of alkylxanthines eliciting vasoconstriction correlated with the observed pA2 values for their adenosine antagonism. The data indicate a physiological role of adenosine, or other purines, as regulator of resting vascular tone in mammalian skeletal muscle.
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Affiliation(s)
- L E Gustafsson
- Department of Physiology, Karolinska Institute, Stockholm, Sweden
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7
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Sproat BS, Beijer B, Iribarren A. New synthetic routes to protected purine 2'-O-methylriboside-3'-O-phosphoramidites using a novel alkylation procedure. Nucleic Acids Res 1990; 18:41-9. [PMID: 2308835 PMCID: PMC330201 DOI: 10.1093/nar/18.1.41] [Citation(s) in RCA: 71] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
A highly selective alkylation procedure has been developed enabling new synthetic routes to be established for protected purine 2'-O-methylriboside-3'-O-phosphoramidites; building blocks for the assembly of 2'-O-methyloligoribonucleotides. The new procedure avoids the use of the highly toxic and potentially explosive reagent diazomethane and is far superior to the use of silver oxide/methyl iodide. Moreover, the use of highly versatile key intermediates will enable the synthesis of a wide variety of base modified analogues as well as other 2'-O-alkylriboside derivatives.
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Affiliation(s)
- B S Sproat
- European Molecular Biology Laboratory, Heidelberg, FRG
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8
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Knudsen TB, Gray MK, Church JK, Blackburn MR, Airhart MJ, Kellems RE, Skalko RG. Early postimplantation embryolethality in mice following in utero inhibition of adenosine deaminase with 2'-deoxycoformycin. TERATOLOGY 1989; 40:615-26. [PMID: 2623648 DOI: 10.1002/tera.1420400609] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Adenosine deaminase (ADA) catalyzes the hydrolytic deamination of adenosine (or 2'-deoxyadenosine) to inosine (or 2'-deoxyinosine). Previously, we have shown that ADA activity is subject to strong cell-specific developmental regulation in placental tissues of mice between days 6 and 11 of gestation (Knudsen et al.:Biology of Reproduction 39:937-951, 1988). In the present study, we examined the effects of intrauterine exposure to 2'-deoxycoformycin (dCF; pentostatin), a potent irreversible inhibitor of ADA, on early postimplantation development. Deoxycoformycin was administered to pregnant ICR mice as a single intraperitoneal injection at a dose of 5 mg/kg on one of days 6 through 11 of gestation (plug day 0). A marked increase in the incidence of implantation site resorptions was observed following treatment specifically on days 7 (61% resorbed) or 8 (78% resorbed). No effect was observed following treatment on days 6, 9, 10, or 11. ADA-immunoreactive protein was shown, by ABC-immunoperoxidase staining on days 7 or 8 of gestation, to be present at high levels in decidual cells of the antimesometrial region but at below-detectable levels in the embryo. Treatment of pregnant dams with dCF on day 7 produced a complete (greater than 99%) inhibition of ADA activity in the antimesometrial decidua by 30 min, induced excessive cell death in the prospective neural plate and primary mesenchyme of the trilaminar disc by 6 h, and arrested embryonic development at an early somite stage. These results suggest that the antimesometrial decidua plays a protective role in preventing an inappropriate accumulation of endogenous ADA substrates in the implantation site.
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Affiliation(s)
- T B Knudsen
- Department of Anatomy, James H. Quillen College of Medicine Johnson City, Tennessee 37614
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Mejer J, Mortensen BT. Changes in the activities of cytidine deaminase during differentiation of HL60 cells induced by 1,25 dihydroxy D3. Leuk Res 1988; 12:405-9. [PMID: 3164086 DOI: 10.1016/0145-2126(88)90059-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The activities of the enzymes cytidine deaminase (CDD), deoxycytidine kinase (dCK), adenosine deaminase (ADA), and purine nucleoside phosphorylase (PNP), have been investigated in the promyelocytic leukemia cell line HL60. The activities of the enzymes corresponded well with that seen in acute myeloid leukemia cells except, that the CDD activity was very low in the HL60 cells. Induction of differentiation in HL60 cells by 1,25 dihydroxy D3 resulted in an increase in CDD from 12 to 247 nmol/h/mg and a decrease in ADA from 1326 to 896 nmol/h/mg, while the activities of dCK, and PNP were unchanged. Retinoic acid, another used inducer of differentiation, gave no changes of the enzyme activities. The increase in CDD activity induced by 1,25 dihydroxy D3 was prevented by inhibition of protein synthesis, whereas inhibition of proliferation of the cells did not abolish the increase of CDD. The changes correspond well with the differences seen between immature and mature myeloid cells. The results may have consequences for the interpretation of results obtained with cytostatics, which are metabolized by the enzymes.
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Affiliation(s)
- J Mejer
- Department of Medicine, Finsen Institute, Copenhagen, Denmark
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10
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Abstract
Optimal monitor wavelengths and differential millimolar extinction coefficients (m delta epsilon) for rate determination of reactions catalyzed by adenosine deaminases on several substrates have been investigated as a function of pH in the range from 6.5 to 12. The values found are in some cases at variance with those quoted in the biochemical literature. The effect of pH on m delta epsilon values is shown to be clearly related to acid-base properties of product and/or substrate in the reaction. Experimental data are in most cases used to derive analytical functions describing the pH dependence of m delta epsilon. For the conversion of adenosine to inosine at pH 6.5, the following values of m delta epsilon +/- SE were obtained: at 263 nm, 8.27 +/- 0.02; at 264 nm, 8.36 +/- 0.02; at 265 nm, 8.27 +/- 0.03. These represent absolute maximal values as a function of pH.
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Affiliation(s)
- G Cercignani
- Department of Physiology and Biochemistry, University of Pisa, Italy
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11
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Knudsen TB, Elmer WA. Evidence for negative control of growth by adenosine in the mammalian embryo: induction of Hmx/+ mutant limb outgrowth by adenosine deaminase. Differentiation 1987; 33:270-9. [PMID: 3596088 DOI: 10.1111/j.1432-0436.1987.tb01567.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
We investigated the growth-regulatory actions of adenosine and adenosine deaminase (ADA) during embryonic limb development in the mouse. Polydactylous outgrowth, an expression of the Hemimelia-extra toe (Hmx/+) mutant phenotype, was experimentally regulated in hindlimb buds explanted into a serum-free in vitro system at stage 18 of gestation. Its expression was promoted by exposure to 0.1 or 0.2 IU/ml exogenous ADA and suppressed by co-exposure to 10 nM (-)-N6-(R-phenylisopropyl)-adenosine (N6-PIA). Evidence that N6-PIA acted as a high-affinity agonist against the external adenosine receptor was provided by experiments in which 100 microM caffeine, a known antagonist, competitively blocked its effect. The endogenous adenosine content was analyzed by reversed-phase high-performance liquid chromatography with fluorometric detection following its conversion to the 1,N6-ethenoadenosine derivative. At stage 18, the adenosine levels were 0.5 pmol/micrograms DNA in whole embryos and 0.08 pmol/micrograms DNA in hindlimb buds. At the same stage, partially purified extracts of the embryonal plasma enriched fraction contained high levels of ADA activity (0.04-0.06 IU/embryo, or 0.7-1.0 IU/mg protein). In contrast, blood cells contained 0.0001 IU/embryo (or 0.01 IU/mg protein). This enzyme occurred as a single kinetic form with a molecular weight of 45000-47000 daltons and an apparent Km of 36-38 microM. Its presence in the embryonal plasma argues against an endocrine mechanism of adenosine secretion in favor of autocrine (self-regulatory) or paracrine (proximate-regulatory) mechanisms. Taken together, our results suggest that the in vitro outgrowth of the prospective polydactylous region is induced upon escape from the local growth-inhibitory influence of extracellular adenosine.(ABSTRACT TRUNCATED AT 250 WORDS)
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Patel BT, Tudball N. Localization of S-adenosylhomocysteine hydrolase and adenosine deaminase immunoreactivities in rat brain. Brain Res 1986; 370:250-64. [PMID: 3518860 DOI: 10.1016/0006-8993(86)90480-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Antisera against rat-liver S-adenosylhomocysteine hydrolase (SAH-hydrolase) and calf intestinal mucosal adenosine deaminase (ADA) were raised in rabbits and subsequently used to determine the distribution of the corresponding enzymes in rat-brain using the peroxidase-antiperoxidase immunohistochemical procedure. SAH-hydrolase antigenicity was prominent in the neocortex, hippocampal formation, cerebellum and olfactory tubercle. In the cerebellum, only those cells associated with the Purkinje layer possessed pronounced reactivity with anti-SAH hydrolase. The intense staining present could be correlated mainly with nuclei, the cytosol being stained less intensely. Weak ADA antigenicity was found throughout the brain, but strong antigenic reactivity was associated with neurones in the basal hypothalamus, superior colliculus and in nerve fibres in many regions. Many ADA antigenic neurones and fibres were seen in close proximity to blood vessels. The distribution of ADA antigenicity was also studied in cat and rabbit brain. In cat brain only general staining of tissue occurred with anti-ADA and no intensely stained regions comparable to those seen in rat brain were observed. Rabbit brain showed weak specifically stained neurones only in the superior colliculus. Enzyme assays were also performed to confirm immunohistochemical findings. There appears to be little in common between regions which stained intensely with anti-SAH hydrolase and anti-ADA respectively. The possible implications of these findings are discussed.
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13
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Tudball N. The effects of S-adenosylhomocysteine and S-adenosylmethionine on some purine- and pyrimidine-metabolizing systems. Biosci Rep 1982; 2:769-75. [PMID: 6293601 DOI: 10.1007/bf01114936] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
The effects of S-adenosylhomocysteine and S-adenosylmethionine on some purine- and pyrimidine-metabolizing systems have been examined. Both compounds were capable of acting as relatively good inhibitors of adenosine deaminase, nucleoside phosphorylase, and adenylate deaminase activities but as relatively poor inhibitors of myokinase and nucleoside monophosphate kinase. The inhibitory effects were freely reversible. 5'-Nucleotidase, orotidine 5'- phosphate, and phosphodiesterase were unaffected. Nucleoside phosphorylase was competitively inhibited by both compounds, whereas mixed inhibitory effects occurred with adenosine deaminase.
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14
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Nair V, Wiechert RJ. Substrate specificity of adenosine deaminase—Function of the 5′-hydroxyl group of adenosine. Bioorg Chem 1980. [DOI: 10.1016/0045-2068(80)90002-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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15
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Abstract
The pathway for the utilization of 2,6-diaminopurine (DAP) as an exogenous purine source in Salmonella typhimurium was examined. In strains able to use DAP as a purine source, mutant derivatives lacking either purine nucleoside phosphorylase or adenosine deaminase activity lost the ability to do so. The implied pathway of DAP utilization was via its conversion to DAP ribonucleoside by purine nucleoside phosphorylase, followed by deamination to guanosine by adenosine deaminase. Guanosine can then enter the established purine salvage pathways. In the course of defining this pathway, purine auxotrophs able to utilize DAP as sole purine source were isolated and partially characterized. These mutants fell into several classes, including (i) strains that only required an exogenous source of guanine nucleotides (e.g., guaA and guaB strains); (ii) strains that had a purF genetic lesion (i.e., were defective in alpha-5-phosphoribosyl 1-pyrophosphate amidotransferase activity); and (iii) strains that had constitutive levels of purine nucleoside phosphorylase. Selection among purine auxotrophs blocked in the de novo synthesis of inosine 5'-monophosphate, for efficient growth on DAP as sole source of purine nucleotides, readily yielded mutants which were defective in the regulation of their deoxyribonucleoside-catabolizing enzymes (e.g., deoR mutants).
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Lawrence F, Richou M, Robert-Gero M. Simultaneous decrease in deamination of 5'-adenylic acid and 5'-deoxy-5'-S-isobutylthioadenosine in chick-embryo fibroblasts infected by Rous sarcoma virus. EUROPEAN JOURNAL OF BIOCHEMISTRY 1980; 107:467-73. [PMID: 6249591 DOI: 10.1111/j.1432-1033.1980.tb06052.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The rate of deamination of 5'-deoxy-5'-S-isobutylthioadenosine [(iBuS5'Ado] in chick embryo fibroblasts was substantially reduced after their infection and morphological transformation by Rous sarcoma virus. Concomitant with the reduction in rate of (iBuS)5'Ado deamination there was a decrease in adenosine deaminase and 5'-adenylic acid deaminase activities. The drop of these activities was related to infection and not to the expression of the src gene. (iBuS)5'Ado was deaminated by at least three enzymes or isoenzymes whose apparent molecular weights have been estimated to be 295000, 121000 and 37000 respectively. Two of these enzymes have been characterized as 5'-adenylic acid deaminase and the heavy form of adenosine deaminase, respectively.
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Henderson JF, Scott FW, Lowe JK. Toxicity of naturally occurring purine deoxyribonucleosides. Pharmacol Ther 1980; 8:573-604. [PMID: 6247724 DOI: 10.1016/0163-7258(80)90077-7] [Citation(s) in RCA: 57] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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18
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Grant AJ, Lerner LM. Unusual substrates for adenosine deaminase from calf intestinal mucosa. BIOCHIMICA ET BIOPHYSICA ACTA 1978; 525:472-6. [PMID: 687643 DOI: 10.1016/0005-2744(78)90244-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A number of adenine nucleosides with exocyclic double bonds either at the 4',5' position in pentofuranosyl nucleosides or at the 5',6' position of hexofuranosyl nucleosides have been found to act as substrates for adenosine deaminase (adenosine aminohydrolase, EC 3.5.4.4) from calf intestinal mucosa. Most of the results obtained are contrary to the accepted minimal structural requirements for substrate activity. These nucleosides had either incorrect anomeric configurations or no hydroxyl group at C-5' or C-3' in the proper configuration; some compounds incorporated both structural changes. There is a possiblity that the unsaturated group has a special role in binding to the enzyme.
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19
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Sakai T, Jun HK. Purification and crystallization of adenosine deaminase in Pseudomonas iodinum IFO 3558. FEBS Lett 1978; 86:174-8. [PMID: 624400 DOI: 10.1016/0014-5793(78)80557-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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20
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Bennett LL, Montgomery JA, Brockman RW, Shealy YF. Design of analogs of purine nucleosides with specifically altered activities as substrates for nucleoside- metabolizing enzymes. ADVANCES IN ENZYME REGULATION 1977; 16:255-71. [PMID: 211817 DOI: 10.1016/0065-2571(78)90077-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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21
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Cha S. Tight-binding inhibitors--III. A new approach for the determination of competition between tight-binding inhibitors and substrates--inhibition of adenosine deaminase by coformycin. Biochem Pharmacol 1976; 25:2695-702. [PMID: 1008893 DOI: 10.1016/0006-2952(76)90259-8] [Citation(s) in RCA: 102] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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22
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Agarwal RP, Sagar SM, Parks RE. Adenosine deaminase from human erythrocytes: purification and effects of adenosine analogs. Biochem Pharmacol 1975; 24:693-701. [PMID: 1125070 DOI: 10.1016/0006-2952(75)90245-2] [Citation(s) in RCA: 172] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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23
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Bishop SH, Barnes LB, Kirkpatrick DS. Adenosine deaminase from Metridium senile (L.) a sea anemone. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. B, COMPARATIVE BIOCHEMISTRY 1972; 43:949-63. [PMID: 4145714 DOI: 10.1016/0305-0491(72)90239-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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24
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Meyskens FL, Williams HE. Adenosine metabolism in human erythrocytes. BIOCHIMICA ET BIOPHYSICA ACTA 1971; 240:170-9. [PMID: 5559973 DOI: 10.1016/0005-2787(71)90654-x] [Citation(s) in RCA: 90] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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25
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3 Purine, Purine Nucleoside, and Purine Nucleotide Aminohydrolases. ACTA ACUST UNITED AC 1971. [DOI: 10.1016/s1874-6047(08)60363-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
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26
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Chivot JJ, Depernet D, Caen J. [Radiochromatographic determination of adenosine deaminase in plasma]. Clin Chim Acta 1970; 27:241-50. [PMID: 4984694 DOI: 10.1016/0009-8981(70)90341-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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27
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Montgomery JA. The biochemical basis for the drug actions of purines. PROGRESS IN MEDICINAL CHEMISTRY 1970; 7:69-123. [PMID: 4923898 DOI: 10.1016/s0079-6468(08)70352-7] [Citation(s) in RCA: 33] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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28
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29
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Ma PF, Fisher JR. Two different hepatic adenosine deaminases in the chicken. BIOCHIMICA ET BIOPHYSICA ACTA 1968; 159:153-9. [PMID: 5650429 DOI: 10.1016/0005-2744(68)90253-2] [Citation(s) in RCA: 51] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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30
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Baer HP, Drummond GI, Gillis J. Studies on the specificity and mechanism of action of adenosine deaminase. Arch Biochem Biophys 1968; 123:172-8. [PMID: 5689048 DOI: 10.1016/0003-9861(68)90116-1] [Citation(s) in RCA: 34] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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31
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Hoagland VD, Fisher JR. Purification and Properties of Chicken Duodenal Adenosine Deaminase. J Biol Chem 1967. [DOI: 10.1016/s0021-9258(18)99544-x] [Citation(s) in RCA: 36] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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32
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Frederiksen S. Specificity of adenosine deaminase toward adenosine and 2'-deoxyadenosine analogues. Arch Biochem Biophys 1966; 113:383-8. [PMID: 5941196 DOI: 10.1016/0003-9861(66)90202-5] [Citation(s) in RCA: 88] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Kompetitive Hemmung der Adenosin-Desaminase als m�gliche Ursache der coronardilatierenden Wirkung einer Pyrimidopyrimidin-Verbindung. Naunyn Schmiedebergs Arch Pharmacol 1966. [DOI: 10.1007/bf00544874] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
34
|
Tong GL, Lee WW, Goodman L, Frederiksen S. Synthesis of some 2′-deoxyribosides of 8-azaadenine. Arch Biochem Biophys 1965. [DOI: 10.1016/0003-9861(65)90012-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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