101
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Turner RJ, Kempner ES. Radiation inactivation studies of the renal brush-border membrane phlorizin-binding protein. J Biol Chem 1982. [DOI: 10.1016/s0021-9258(18)33894-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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102
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Krall JF, Leshon SC, Frolich M, Jamgotchian N, Korenman SG. Adenylate cyclase activation. Characterization of guanyl nucleotide requirements by direct radioligand-binding methods. J Biol Chem 1982. [DOI: 10.1016/s0021-9258(18)33861-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
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103
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Baehr W, Morita EA, Swanson RJ, Applebury ML. Characterization of bovine rod outer segment G-protein. J Biol Chem 1982. [DOI: 10.1016/s0021-9258(20)65163-8] [Citation(s) in RCA: 227] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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104
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Svec J, Svec P, Halcak L, Thurzo V. Role of natural prostaglandins in the control of murine mammary tumor virus expression. J Cancer Res Clin Oncol 1982; 103:55-67. [PMID: 6281284 DOI: 10.1007/bf00410306] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The regulation of murine mammary tumor virus (MuMTV) production by mammotropic hormones, hormonomimetic substances, and cyclic nucleotides was investigated. The virus produced in control and treated mammary tumor cell cultures was quantitated by measuring the supernatant reverse transcriptase activity in exogenous reaction using poly(rC).oligo(dG) as template-primer. Two days after exposure, the synthetic glucocorticoid, dexamethasone (DXMT), increased spontaneous MuMTV production at optimal concentration (0.1 mumol) up to ten times. Dibutyryl derivative of cyclic AMP had no effect on spontaneous MuMTV production, whereas the drug potentiated suboptimal concentrations of the glucocorticoid. Natural prostaglandins, potent agonists of adenylate cyclase catalyzing intracellular synthesis of cyclic AMP, enhanced both basal (up to five times) and DXMT-stimulated (up to 1.6 times) MuMTV replication. The MuMTV-stimulating activity of prostaglandins decreased in the order of PGA1 greater than PGE1 greater than PGB1 greater than PGF2 alpha. Prostaglandins can be replaced partially by norepinephrine and isoproterenol by enhancing the DXMT-mediated MuMTV stimulation, whereas these drugs remained without effect on spontaneous MuMTV production. Theophylline, an antagonist of cAMP-phosphodiesterase converting cAMP to AMP, enhanced the virus-stimulating activity of DXMT as well as of prostaglandins. The enhancement of MuMTV production by adenylate cyclase agonists do not correlate absolutely with the estimates of intracellular cAMP levels, since the highest amounts of cAMP has been repeatedly observed in cells treated with PGE1 and norepinephrine. The results indicate that besides hormones, other hormone-like substances and cyclic nucleotides may be involved in the complex mechanism of hormone-regulated MuMTV genome expression.
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105
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106
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Bradham LS, Cheung WY. Nucleotide cyclases. PROGRESS IN NUCLEIC ACID RESEARCH AND MOLECULAR BIOLOGY 1982; 27:189-231. [PMID: 6124997 DOI: 10.1016/s0079-6603(08)60601-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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107
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108
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Minocherhomjee AM, Roufogalis BD. Mechanisms of coupling of the beta-adrenergic receptor to adenylate cyclase--an overview. GENERAL PHARMACOLOGY 1982; 13:87-93. [PMID: 6284585 DOI: 10.1016/0306-3623(82)90061-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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109
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Cholera toxin action and the regulation of hormone-sensitive adenylate cyclase. ACTA ACUST UNITED AC 1982. [DOI: 10.1016/b978-0-444-80400-6.50007-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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110
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Pollet R, Kempner E, Standaert M, Haase B. Structure of the insulin receptor of the cultured human lymphoblastoid cell IM-9. Evidence suggesting that two subunits are required for insulin binding. J Biol Chem 1982. [DOI: 10.1016/s0021-9258(19)68283-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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111
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Fewtrell C, Kempner E, Poy G, Metzger H. Unexpected findings from target analysis of immunoglobulin E and its receptor. Biochemistry 1981; 20:6589-94. [PMID: 6458330 DOI: 10.1021/bi00526a011] [Citation(s) in RCA: 32] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The membrane receptor for immunoglobulin E (IgE) and its ligand, IgE, were irradiated with high-energy electrons. Loss of binding activity was measured for each, and the size of the functional targets was assessed. In both cases, the target size was substantially smaller than the covalent structure of the molecule. The direction of this discrepancy is unprecedented on the basis of experience with loss of enzymatic activity by irradiation; indeed, two enzymes which were present in the receptor preparations gave expected values when measured simultaneously. We suggest that in instances where a function such as ligand binding resides in a conformationally stable domain, radiation inactivation may be capable of revealing this.
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112
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Kincaid R, Kempner E, Manganiello V, Osborne J, Vaughan M. Calmodulin-activated cyclic nucleotide phosphodiesterase from brain. Relationship of subunit structure to activity assessed by radiation inactivation. J Biol Chem 1981. [DOI: 10.1016/s0021-9258(19)68598-4] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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113
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Harmon J, Kempner E, Kahn C. Demonstration by radiation inactivation that insulin alters the structure of the insulin receptor in rat liver membranes. J Biol Chem 1981. [DOI: 10.1016/s0021-9258(18)43332-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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114
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Svoboda M, Lambert M, Christophe J. Distinct effects of the C-terminal octapeptide of cholecystokinin and of a cholera toxin pretreatment of the kinetics of rat pancreatic adenylate cyclase activity. BIOCHIMICA ET BIOPHYSICA ACTA 1981; 675:46-61. [PMID: 6266495 DOI: 10.1016/0304-4165(81)90068-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
(1) The kinetic parameters of rat pancreatic adenylate cyclase were evaluated, using GTP, p[NH]ppG or GTP gamma S as nucleotide activator, cholecystokinin as peptide hormone, and GDP beta S and dibutyryl cyclic GMP as inhibitors of guanosine triphosphate and CCK-8, respectively. The time courses of activation and the degree of activation at steady state (EA/ETOT) were compatible with a simple two-state model of activation-deactivation based on a pseudo-monomolecular activation process (rate constant kappa+1), and a deactivation process (rate constant kappa off) that included, depending on the activating nucleotide, the hydrolysis of GTP (rate constant kappa 2) and/or the dissociation of the intact nucleotide (rate constant kappa-1), so that EA/ETOT = kappa+1/(kappa+1 + kappa 2 + kappa-1). (2) The hormone CCK-8 increased the value of kappa+1 with GTP dose-dependently, from 0.2 to 10.9 min-1. The value of kappa-1 increased 0.01 to 0.3 min-1 but the value of kappa 2 was unaltered at 7 min-1, so that EA/ETOT increased 15-fold, from 4% to 61%. (3) A cholera toxin pretreatment at 30 micrograms/ml allowed also a large increase in EA/ETOT with GTP (up to 51%) but the underlying mechanism was different. It consisted of a 14-fold decrease in the kappa off value of the GTP-activated enzyme (from 7 min-1 to 0.5 min-1) that corresponded to a reduction in GTPase activity. When testing the system with p[NH]ppG, two added effects of the cholera toxin pretreatment were observed: a 4-fold increase in the value of kappa+1 (from 0.2 to 0.8 min-1) and the occurrence of a significant 0.3 min-1 value for kappa-1.
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115
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Steer C, Kempner E, Ashwell G. Molecular size of the hepatic receptor for asialoglycoproteins determined in situ by radiation inactivation. J Biol Chem 1981. [DOI: 10.1016/s0021-9258(19)69285-9] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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116
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De Vente J, Zaagsma J. The influence of the divalent cations Mn2+ and Mg2+ on the activation of particulate and digitonin-solubilized adenylate cyclase from rat fat cell membranes. Arch Biochem Biophys 1981; 209:249-55. [PMID: 7283440 DOI: 10.1016/0003-9861(81)90278-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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117
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118
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Beckner SK, Blecher M. Regulatory states of adenylate cyclase in RL-PR-C cloned rat hepatocytes. BIOCHIMICA ET BIOPHYSICA ACTA 1981; 673:467-76. [PMID: 7225427 DOI: 10.1016/0304-4165(81)90478-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The adenylate cyclase of cloned differentiated rat hepatocytes (RL-PR-C) is regulated by cholera toxin, guanine nucleotides and fluoride. The activation of hepatic adenylate cyclase by cholera toxin was additive with that by GTP and synergistic with that by epinephrine. In contrast, when membranes were exposed to cholera toxin in the presence of Gpp(NH)p or fluoride, the response was the same as to these agents in the absence of cholera toxin. Cholera toxin-activated membranes were responsiveness only to epinephrine and GTP, while fluoride-activated membranes responded somewhat to all other agents, and Gpp(NH)p-activated membranes responded to no other agents. These data suggest that responsiveness of hepatic adenylate cyclase to cholera toxin, fluoride and Gpp(NH)p cannot be expressed simultaneously. A model is presented to explain these observations which invokes multiple states of adenylate cyclase, each being sensitive to, or brought about by, a different regulatory agent.
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119
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Shain W, Carpenter DO. Mechanisms of synaptic modulation. INTERNATIONAL REVIEW OF NEUROBIOLOGY 1981; 22:205-50. [PMID: 6115826 DOI: 10.1016/s0074-7742(08)60294-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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120
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Kahn CR, Baird KL, Flier JS, Grunfeld C, Harmon JT, Harrison LC, Karlsson FA, Kasuga M, King GL, Lang UC, Podskalny JM, Van Obberghen E. Insulin receptors, receptor antibodies, and the mechanism of insulin action. RECENT PROGRESS IN HORMONE RESEARCH 1981; 37:477-538. [PMID: 6269165 DOI: 10.1016/b978-0-12-571137-1.50015-3] [Citation(s) in RCA: 35] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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121
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Freedman R. Chapter 5 Membrane-bound enzymes. ACTA ACUST UNITED AC 1981. [DOI: 10.1016/s0167-7306(09)60009-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
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122
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Diamond E, Norton K, McIntosh D, Berman M. Tightly bound calcium of adenosine triphosphatase in sarcoplasmic reticulum from rabbit skeletal muscle. J Biol Chem 1980. [DOI: 10.1016/s0021-9258(19)70299-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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123
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124
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Wright D, Rodbell M. Preparation of 2-thioltryptophan-glucagon and (tryptophan-S-glucagon)2. Differences in binding to the glucagon receptor in the hepatic adenylate cyclase system. J Biol Chem 1980. [DOI: 10.1016/s0021-9258(19)70389-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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125
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Neer E, Echeverria D, Knox S. Increase in the size of soluble brain adenylate cyclase with activation by guanosine 5'-(beta, gamma-imino)triphosphate. J Biol Chem 1980. [DOI: 10.1016/s0021-9258(18)43461-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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126
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Selective effects of organic mercurials on the GTP-regulatory proteins of adenylate cyclase systems. J Biol Chem 1980. [DOI: 10.1016/s0021-9258(20)79694-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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127
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Kempner E, Miller J, Schlegel W, Hearon J. The functional unit of polyenzymes. Determination by radiation inactivation. J Biol Chem 1980. [DOI: 10.1016/s0021-9258(18)43647-2] [Citation(s) in RCA: 38] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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128
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Goldhammer A, Cook G, Wolff J. Preactivation as a determinant for the size of thyroid adenylate cyclase. J Biol Chem 1980. [DOI: 10.1016/s0021-9258(18)43662-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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129
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Schlegel W, Cooper DM, Rodbell M. Inhibition and activation of fat cell adenylate cyclase by GTP is mediated by structures of different size. Arch Biochem Biophys 1980; 201:678-82. [PMID: 6249213 DOI: 10.1016/0003-9861(80)90559-7] [Citation(s) in RCA: 37] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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130
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Harmon J, Kahn C, Kempner E, Schlegel W. Characterization of the insulin receptor in its membrane environment by radiation inactivation. J Biol Chem 1980. [DOI: 10.1016/s0021-9258(19)85714-9] [Citation(s) in RCA: 94] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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131
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Modulation of adenylate cyclase in intact macrophages by microtubules. Opposing actions of colchicine and chemotactic factor. J Biol Chem 1980. [DOI: 10.1016/s0021-9258(19)85785-x] [Citation(s) in RCA: 38] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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132
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Kaslow H, Johnson G, Brothers V, Bourne H. A regulatory component of adenylate cyclase from human erythrocyte membranes. J Biol Chem 1980. [DOI: 10.1016/s0021-9258(19)85766-6] [Citation(s) in RCA: 51] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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133
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Abstract
Cell membrane receptors for hormones and neurotransmitters form oligomeric complexes with GTP-regulatory proteins and inhibit the latter from reacting with GTP. Hormones and neurotransmitters act by releasing the inhibitory constraints imposed by the receptors, thus allowing the GTP-regulatory proteins to interact with and control the activity of enzymes such as adenylate cyclase. This theory may apply generally to membrane signal transduction involving surface receptors.
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134
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Lad P, Nielsen T, Preston M, Rodbell M. The role of the guanine nucleotide exchange reaction in the regulation of the beta-adrenergic receptor and in the actions of catecholamines and cholera toxin on adenylate cyclase in turkey erythrocyte membranes. J Biol Chem 1980. [DOI: 10.1016/s0021-9258(19)86130-6] [Citation(s) in RCA: 103] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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135
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Stengel D, Hanoune J. Solubilization and physical characterization of the adenylate cyclase from rat-liver plasma membranes. EUROPEAN JOURNAL OF BIOCHEMISTRY 1979; 102:21-34. [PMID: 520322 DOI: 10.1111/j.1432-1033.1979.tb06259.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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