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Pan FTC, Applebaum SL, Manahan DT. Differing thermal sensitivities of physiological processes alter ATP allocation. ACTA ACUST UNITED AC 2021; 224:jeb.233379. [PMID: 33328288 DOI: 10.1242/jeb.233379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 12/07/2020] [Indexed: 10/22/2022]
Abstract
Changes in environmental temperature affect rate processes at all levels of biological organization. Yet the thermal sensitivity of specific physiological processes that affect allocation of the ATP pool within a species is less well understood. In this study of developmental stages of the Pacific oyster, Crassostrea gigas, thermal sensitivities were measured for growth, survivorship, protein synthesis, respiration and transport of amino acids and ions. At warmer temperatures, larvae grew faster but suffered increased mortality. An analysis of temperature sensitivity (Q 10 values) revealed that protein synthesis, the major ATP-consuming process in larvae of C. gigas, is more sensitive to temperature change (Q 10 value of 2.9±0.18) than metabolic rate (Q 10 of 2.0±0.15). Ion transport by Na+/K+-ATPase measured in vivo has a Q 10 value of 2.1±0.09. The corresponding value for glycine transport is 2.4±0.23. Differing thermal responses for protein synthesis and respiration result in a disproportional increase in the allocation of available ATP to protein synthesis with rising temperature. A bioenergetic model is presented illustrating how changes in growth and temperature affect allocation of the ATP pool. Over an environmentally relevant temperature range for this species, the proportion of the ATP pool allocated to protein synthesis increases from 35 to 65%. The greater energy demand to support protein synthesis with increasing temperature will compromise energy availability to support other essential physiological processes. Defining the trade-offs of ATP demand will provide insights into understanding the adaptive capacity of organisms to respond to various scenarios of environmental change.
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Affiliation(s)
- Francis T C Pan
- Department of Biological Sciences, University of Southern California, Los Angeles, CA 90089-0371, USA
| | - Scott L Applebaum
- Department of Biological Sciences, University of Southern California, Los Angeles, CA 90089-0371, USA
| | - Donal T Manahan
- Department of Biological Sciences, University of Southern California, Los Angeles, CA 90089-0371, USA
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2
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Koepsell H. Methodological aspects of purification and reconstitution of transport proteins from mammalian plasma membranes. Rev Physiol Biochem Pharmacol 2006; 104:65-137. [PMID: 2940665 DOI: 10.1007/bfb0031013] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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3
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Abstract
This article gives a history of the evidence (a) that animal cell membranes contain pumps that expel sodium ions in exchange for potassium ions; (b) that the pump derives energy from the hydrolysis of ATP; (c) that it is thermodynamically reversible-artificially steep transmembrane ion gradients make it run backward synthesizing ATP from ADP and orthophosphate; (d) that its mechanism is a ping-pong one, in which phosphorylation of the pump by ATP is associated with an efflux of three sodium ions, and hydrolysis of the phosphoenzyme is associated with an influx of two potassium ions; (e) that each half of the working cycle involves both the transfer of a phosphate group and a conformational change-the phosphate transfer being associated with the occlusion of ions bound at one surface and the conformational change releasing the occluded ions at the opposite surface.
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Affiliation(s)
- Ian M Glynn
- Trinity College, Cambridge CB2 1TQ, England.
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4
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Fendler K, Dröse S, Altendorf K, Bamberg E. Electrogenic K+ transport by the Kdp-ATPase of Escherichia coli. Biochemistry 1996; 35:8009-17. [PMID: 8672505 DOI: 10.1021/bi960175e] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Charge translocation by the Kdp-ATPase of Escherichia coli was measured by adsorption of proteoliposomes to a planar lipid membrane. The proteoliposomes were prepared by reconstitution of purified Kdp-ATPase into liposomes prepared from E. coli lipids. The protein was activated by a ATP concentration jump produced by photolysis of a protected derivative of ATP, caged ATP. Charge translocation was measured with a time resolution of 15-40 ms. Stationary currents demonstrated the continuous pumping activity of the enzyme. Control measurements with the potential-sensitive dye DiSC3(5) showed a negative potential inside the proteoliposomes after activation with ATP. The measured electrical signals as well as the dye measurements correspond to the transport of positive charge to the intracellular face of the protein. The electrical signal was increased when K+ was inside the proteoliposomes (K0.5 approximately 50 microM) and was inhibited by vanadate. These experiments demonstrate the electrogeneity of the Kdp-ATPase in a purified reconstituted system.
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Affiliation(s)
- K Fendler
- Max-Planck-Institut für Biophysik, Frankfurt/M, Germany
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5
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Labrecque G, Holowka D, Baird B. Characterization of increased K+ permeability associated with the stimulation of receptors for immunoglobulin E on rat basophilic leukemia cells. J Biol Chem 1991. [DOI: 10.1016/s0021-9258(18)98564-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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6
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Cornelius F. Functional reconstitution of the sodium pump. Kinetics of exchange reactions performed by reconstituted Na/K-ATPase. BIOCHIMICA ET BIOPHYSICA ACTA 1991; 1071:19-66. [PMID: 1848452 DOI: 10.1016/0304-4157(91)90011-k] [Citation(s) in RCA: 102] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- F Cornelius
- Institute of Biophysics, University of Aarhus, Denmark
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7
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Villalobo A. Reconstitution of ion-motive transport ATPases in artificial lipid membranes. BIOCHIMICA ET BIOPHYSICA ACTA 1990; 1017:1-48. [PMID: 1693288 DOI: 10.1016/0005-2728(90)90176-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- A Villalobo
- Instituto de Investigaciones Biomédicas, C.S.I.C., Madrid, Spain
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8
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Chapter 13 Sodium Pump Current in Renal Tubular Cells. ACTA ACUST UNITED AC 1989. [DOI: 10.1016/s0070-2161(08)60017-9] [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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9
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Goldin SM, Forgac M, Chin G. Reconstitution of Na,K-pump activity by cholate dialysis: sidedness and stoichiometry. Methods Enzymol 1988; 156:127-40. [PMID: 2835599 DOI: 10.1016/0076-6879(88)56016-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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10
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Cornelius F. Incorporation of C12E8-solubilized Na+,K+-ATPase into liposomes: determination of sidedness and orientation. Methods Enzymol 1988; 156:156-67. [PMID: 2835601 DOI: 10.1016/0076-6879(88)56018-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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11
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Hokin LE, Dixon JF. Reconstitution of the Na,K-pump by freeze-thaw sonication: estimation of coupling ratio and electrogenicity. Methods Enzymol 1988; 156:141-55. [PMID: 2835600 DOI: 10.1016/0076-6879(88)56017-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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12
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Marver D, Lear S, Marver LT, Silva P, Epstein FH. Cyclic AMP-dependent stimulation of Na,K-ATPase in shark rectal gland. J Membr Biol 1986; 94:205-15. [PMID: 3031307 DOI: 10.1007/bf01869716] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Scatchard analysis of 3H ouabain bound to isolated rectal gland cells as a function of increasing ouabain concentrations produced a concave curvilinear plot that was resolved into two specific sites with either a high (I) or low (II) affinity for ouabain. Cyclic cAMP/theophylline (+/- furosemide, 10(-4) M) increased the amount of 3H ouabain bound to the high-affinity site I. Vanadate, a phosphate congener which promotes formation of the ouabain-binding state of the enzyme, mimicked the effects of cAMP/theophylline at low concentrations of ouabain, suggesting that cAMP/theophylline increases binding to site I by enhancing the rate of turnover of resident enzyme. Enhanced 86Rb uptake seen following cAMP/theophylline administration was primarily associated with increased flux through the high-affinity ouabain site, and this stimulation was not obliterated by the co-administration of furosemide. A model was presented which suggested the presence of two noninteracting pools of enzyme or isozymes which exhibit either a high or low affinity for ouabain. Cyclic AMP both stimulated turnover via site I, and modified the kinetics of binding of 3H ouabain to site II. The (ave) Kd of 3H ouabain for site II was increased from 3.6 microM (controls) to 0.5 microM (cAMP/theophylline) and the Hill coefficient was modified from 0.45 (controls) to 1.12 (cAMP/theophylline), suggesting a transition from a negative- to a noncooperative binding state. While furosemide reversed the effects of cAMP/theophylline on site II kinetics, it did not obliterate cAMP/theophylline effects on site I. This suggests that cAMP may alter the intrinsic turnover rate of this particular pool of Na,K-ATPase in shark rectal gland.
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13
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Marín R, Proverbio T, Proverbio F. Inside-out basolateral plasma membrane vesicles from rat kidney proximal tubular cells. BIOCHIMICA ET BIOPHYSICA ACTA 1986; 858:195-201. [PMID: 3011091 DOI: 10.1016/0005-2736(86)90306-8] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
A method for preparation of highly purified basolateral plasma membranes from rat kidney proximal tubular cells is reported. These membranes were assayed for the presence of vesicles as well as for their orientation. (Na+ + K+)-ATPase activity and [3H]ouabain binding studies with membranes treated with or without SDS revealed that the preparation consisted of almost 100% vesicles. The percentage of inside-out vesicles was found to be approx. 70%. This percentage was determined measuring the (Na+ + K+)-ATPase activity in K+-loaded vesicles and in membranes treated with or without trypsin and SDS. These membranes represent a very efficient tool to assay the correlation between active transport and ATPase activities in basolateral plasma membranes from rat kidney proximal tubular cells.
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Anner BM. Interaction of (Na+ + K+)-ATPase with artificial membranes. I. Formation and structure of (Na+ + K+)-ATPase-liposomes. BIOCHIMICA ET BIOPHYSICA ACTA 1985; 822:319-34. [PMID: 2998473 DOI: 10.1016/0304-4157(85)90013-9] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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15
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Anner BM. Interaction of (Na+ + K+)-ATPase with artificial membranes. II. Expression of partial transport reactions. BIOCHIMICA ET BIOPHYSICA ACTA 1985; 822:335-53. [PMID: 2415163 DOI: 10.1016/0304-4157(85)90014-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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16
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Cornelius F, Skou JC. Reconstitution of (Na+ + K+)-ATPase into phospholipid vesicles with full recovery of its specific activity. BIOCHIMICA ET BIOPHYSICA ACTA 1984; 772:357-73. [PMID: 6326830 DOI: 10.1016/0005-2736(84)90153-6] [Citation(s) in RCA: 91] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
(Na+ + K+)-ATPase from rectal glands of the spiny dogfish has been reconstituted into phospholipid vesicles. The nonionic detergent octaethyleneglycoldodecyl monoether ( C12E8 ) is used to dissolve both the enzyme and the lipids and reconstitution is accomplished by subsequent removal of the detergent by adsorption to polystyrene beads. About 60% of the enzyme incorporates in the right-side-out orientation (r/o). The fraction of molecules in the inside-out orientation (i/o) increases from about 10% to about 30% with a parallel decrease in the fraction of 'non-oriented' (n-o) molecules (both sides exposed) when the protein/lipid ratio decreases from 1:10 to 1:75. The orientation of enzyme molecules detected from vanadate binding is the same as measured from activity, i.e., the turnover of the enzyme molecule in the different orientations is the same. The recovery of the specific activity of the incorporated enzyme increases with an increase in the protein/lipid ratio and is 100% with a protein/lipid ratio of about 1:20 or higher. Full recovery is only obtained provided a proper lipid composition is chosen which includes both negatively charged phospholipids, preferably phosphatidylinositol, and cholesterol. The ATP-dependent, K+-stimulated Na+-influx is found to be about 35 mumol Na+ per mg (i/o)-protein per min at 22 degrees C in 1:10 protein/lipid liposomes. The specific activity corresponds to 3 Na+ transported per ATP molecule hydrolyzed.
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17
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Hiatt A, McDonough AA, Edelman IS. Assembly of the (Na+ + K+)-adenosine triphosphatase. Post-translational membrane integration of the alpha subunit. J Biol Chem 1984. [DOI: 10.1016/s0021-9258(17)43400-4] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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18
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3 Ion Transport and Gill Atpases. ACTA ACUST UNITED AC 1984. [DOI: 10.1016/s1546-5098(08)60182-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
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19
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Na and K Fluxes Mediated by ATP-Free and ATP-Activated Na,K-ATPase in Liposomes. ACTA ACUST UNITED AC 1983. [DOI: 10.1016/s0070-2161(08)60617-6] [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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20
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Forbush B. Characterization of right-side-out membrane vesicles rich in (Na,K)-ATPase and isolated from dog kidney outer medulla. J Biol Chem 1982. [DOI: 10.1016/s0021-9258(18)33564-6] [Citation(s) in RCA: 75] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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21
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Isolation of plasma membrane vesicles from rabbit skeletal muscle and their use in ion transport studies. J Biol Chem 1982. [DOI: 10.1016/s0021-9258(18)33527-0] [Citation(s) in RCA: 90] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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22
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Boldyrev AA, Svinukhova IA. Na+, K+-dependent adenosine triphosphate phosphohydrolase. Two types of kinetics. BIOCHIMICA ET BIOPHYSICA ACTA 1982; 707:167-70. [PMID: 6291616 DOI: 10.1016/0167-4838(82)90411-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Kinetic analysis of hydrolytic activity of (Na+, K+)-ATPase purified from duck salt glands shows that several substrates are hydrolysed in different manners. UTP, GTP and ITP are hydrolysed in accordance with usual Michaelis kinetics with the single Km value and with no cooperatively (Hill coefficient, nH = 1), while CTP is hydrolysed, like ATP, in accordance with non-Michaelis kinetics with two Km values. Hydrolysis of the last two substrates in the range of the second Km is characterised by positive cooperativity with nH greater than 1.
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23
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Ross MD, Ernst SA, Kerr TP. Possible functional roles of Na+,K+-ATPase in the inner ear and their relevance to Ménière's disease. Am J Otolaryngol 1982; 3:353-60. [PMID: 6293330 DOI: 10.1016/s0196-0709(82)80010-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
This article reviews the functions of the enzyme Na+,K+-ATPase in epithelial tissues and discusses early and recent biochemical, physiologic and morphologic studies of the enzyme in the inner ear. The purpose of the investigation was to learn whether a relationship between perturbations in activity of the enzyme and Ménière's disease is possible. It is concluded that the preponderance of the evidence indicates that Na+,K+-ATPase plays a role in regulating ion transport into the scala media, but that the significance of the distribution of the enzyme along only one cell type (the marginal) in the functional chains of cells of the outer cochlear wall needs further study. The possible vasoconstrictive effects of ouabain perfusions employed by some investigators must also be taken into account. Recent cytochemical and autoradiographic studies have demonstrated high levels of Na+, K+-ATPase on cochlear nerve fibers, especially near the foramina nervosa and within the organ of Corti. Thus, perturbations in Na+,K+-ATPase activity in the inner ear not only could affect certain aspects of fluid balance, but also could account for the sensory disturbances experienced by patients who have Ménière's disease.
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24
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Reconstitution of a sodium pump on lipid vesicles. NEUROPHYSIOLOGY+ 1982. [DOI: 10.1007/bf01058668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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25
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Bruni A, Palatini P. Biological and pharmacological properties of phospholipids. PROGRESS IN MEDICINAL CHEMISTRY 1982; 19:111-203. [PMID: 6758038 DOI: 10.1016/s0079-6468(08)70329-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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26
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Sengupta N, Datta SC, Sengupta D. Altered kinetics of membrane ATPase in mental illness. BIOCHEMICAL MEDICINE 1981; 26:277-85. [PMID: 6277300 DOI: 10.1016/0006-2944(81)90002-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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27
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Abstract
Techniques for the isolation and study of basolateral membrane vesicles from the intestinal epithelium have afforded new insights into the mechanisms of intestinal absorption. First, we have confirmed the hypothesis that the second stage of glucose transport involves facilitated diffusion. Second, we have shown that the major system for translocation of neutral amino acids across the basolateral membrane is the classical "L" system. Third, we have established that basolateral membranes contain sodium-dependent transport systems that may be useful in the supply of essential amino acids to the epithelium from the blood. And, finally, our studies of the basolateral (Na + K)-ATPase have clarified the role of this enzyme in sodium absorption.
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Cumberbatch M, Zareian K, Morgan DB, Swaminathan R. The relationship between sodium transport and Na+, K+ ATPase in human erythrocytes. BIOCHEMICAL MEDICINE 1981; 26:60-6. [PMID: 6271119 DOI: 10.1016/0006-2944(81)90030-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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29
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Swann AC, Albers RW. Temperature effects on cation affinities of the (Na+, K+)-ATPase of mammalian brain. BIOCHIMICA ET BIOPHYSICA ACTA 1981; 644:36-40. [PMID: 6266463 DOI: 10.1016/0005-2736(81)90055-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Effects of temperature on the Na+-dependent ADP-ATP exchange and the p-nitrophenylphosphatase reactions catalysed by (Na+, K+)-ATPase were examined. Apparent Mg2+ affinity decreased with decreasing temperature. Arrhenius plots of p-nitrophenylphosphatase in the presence of Na+ and ATP had discontinuities similar to those previously reported for (Na+ + K+)-ATPase, while those of p-nitrophenylphosphatase measured without Na+ or ATP did not. The apparent activation energy for p-nitrophenylphosphatase was a function of the physical characteristics of the cation acting at the K+ site.
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Abstract
Proteins which traverse membranes tend to have a dimeric structure in which the dimer is arranged asymmetrically across the membrane with the axis of symmetry perpendicular to the membrane plane. This general structure is well suited to the function of transporting nutrients across the cell membrane.
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32
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Rodriguez HJ, Hogan WC, Sinha SK, Jacobson MP, Klahr S. The K+-dependent phosphatase of rat kidney. Its properties and the effects of maneuvers that modify (Na+ + K+)-ATPase activity. BIOCHIMICA ET BIOPHYSICA ACTA 1981; 641:36-54. [PMID: 6260182 DOI: 10.1016/0005-2736(81)90567-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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33
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Wüthrich C, Steck AJ. A permeability change of myelin membrane vesicles towards cations is induced by MgATP but not by phosphorylation of myelin basic proteins. BIOCHIMICA ET BIOPHYSICA ACTA 1981; 640:195-206. [PMID: 6163456 DOI: 10.1016/0005-2736(81)90545-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The existence of an endogenous protein kinase activity and protein phosphatase activity in myelin membrane from mammalian brain has now been well established. We found that under all conditions tested the myelin basic protein is almost the only substrate of the endogenous protein kinase in myelin of bovine brain. The protein kinase activity is stimulated by Ca2+ in the micromolar range. Optimal activity is reached at a free Ca2+ concentration of about 2 microM. Myelin membrane vesicles were prepared and then shown to be sealed by a light-scattering technique. After preloading with 45Ca2+, 86Rb+, or 22Na+, the self-diffusion (passive outflux) of these ions from myelin membrane vesicles was measured. Ionophores induced a rapid, concentration-dependent outflux of 80--90% of the cations, indicating that only a small fraction of the trapped ions was membrane bound. There was no difference in the diffusion rates of the three cations whether phosphorylated (about 1 mol phosphate per myelin basic protein) or non-phosphorylated vesicles were tested. In contrast, a small but significant decrease in permeability for Rb+ and Na+ was measured, when the vesicles were pretreated with ATP and Mg2+.
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Grosse R, Spitzer E, Kupriyanov VV, Saks VA, Repke KR. Coordinate interplay between (Na+ + K+)-ATPase and creatine phosphokinase optimizes (Na+/K+)-antiport across the membrane of vesicles formed from the plasma membrane of cardiac muscle cell. BIOCHIMICA ET BIOPHYSICA ACTA 1980; 603:142-56. [PMID: 6255995 DOI: 10.1016/0005-2736(80)90397-1] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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36
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37
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39
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Bakker-Grunwald T, Andrew JS, Neville MC. K+ influx components in ascites cells: the effects of agents interacting with the (Na+ + K+)-pump. J Membr Biol 1980; 52:141-6. [PMID: 6245215 DOI: 10.1007/bf01869119] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Several agents known to interact with the (Na+ + K+)-pump were tested for their effects on the components of steady-state K+ flux in ascites cells. 86Rb+ was used as a tracer for K+, and influx was differentiated into a ouabain-inhibitable "pump" component, a Cl--dependent and furosemide-sensitive "exchange" component, and a residual "leak" flux. All agents tested (ouabain, quercetin, oligomycin, phosphate) affected both the "pump" flux and the Cl--linked flux. These findings suggest a linkage between the activity of the Na/K ATPase and the Cl--dependent K+ exchange flux. In the discussion we point out that the mechanism of this linkage could be direct; e.g., Cl--dependent exchange may represent a mode of operation of the Na/K ATPase. However, data from this and other systems tend to suggest an indirect linkage between the Na+ pump and a KCl symporter, perhaps via a change in the level of intracellular ATP.
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40
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Oxygen consumption in the rectal gland of the dogfishScyliorhinus canicula and the effects of cyclic AMP. ACTA ACUST UNITED AC 1980. [DOI: 10.1007/bf00688620] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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41
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42
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Pennington J, Hokin L. Effects of wheat germ agglutinin on the coupled transports of sodium and potassium in reconstituted (Na,K)-ATPase liposomes. J Biol Chem 1979. [DOI: 10.1016/s0021-9258(19)83580-9] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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43
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(Na+ + K+)-adenosine triphosphatase of mammalian brain. Catalytic and regulatory K+ sites distinguishable by selectivity for Li+. J Biol Chem 1979. [DOI: 10.1016/s0021-9258(17)30045-5] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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44
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Ionophores and Ion Transport Across Natural Membranes. ACTA ACUST UNITED AC 1979. [DOI: 10.1016/b978-0-12-152509-5.50011-7] [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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45
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Negendank W, Shaller C. Potassium-sodium distribution in human lymphocytes: description by the association-induction hypothesis. J Cell Physiol 1979; 98:95-105. [PMID: 762204 DOI: 10.1002/jcp.1040980111] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Human lymphocytes were equilibrated for 48 hours over a wide range of external potassium levels, and their contents of potassium, sodium, and water determined. As external potassium rose from zero, cell potassium rose steeply in a sigmoidal fashion, reached half-saturation at 0.4 mM esternal potassium, and then saturated at 129 mmoles/kg cells. The saturable cell potassium exchanged mole-for-mole with sodium. Analysis of the saturable components by a statistical-mechanical adsorption model demonstrated a cooperative intraction between sites determining equilibrium potassium-sodium distribution. Superimposed upon the saturable fraction of cell potassium was a smaller one that was non-saturable with increasing external potassium to at least 64 mM, and that, when expressed as mmoles/liter cell water, existed in a ratio to external potassium of 0.6. The results strongly support the association-induction hypothesis, which predicts a small non-saturable component of ions determined by exclusion from oriented cell water and a cooperative interaction between sites throughout the cell that associate with potassium or sodium.
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Kagawa Y. Reconstitution of the energy transformer, gate and channel subunit reassembly, crystalline ATPase and ATP synthesis. BIOCHIMICA ET BIOPHYSICA ACTA 1978; 505:45-93. [PMID: 30482 DOI: 10.1016/0304-4173(78)90008-3] [Citation(s) in RCA: 198] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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47
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Klingenberg M. [Transport catalysis in biomembranes elucidated by the interactions of ADP, ATP-carriers in mitochondria]. THE SCIENCE OF NATURE - NATURWISSENSCHAFTEN 1978; 65:456-61. [PMID: 703848 DOI: 10.1007/bf00702831] [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 basic issue of biomembranes is their ability to facilitate specific transport of selected molecules. This transport is catalyzed by carriers which are membrane proteins and form, analogous to enzymes, carrier-substrate complexes. The ADP, ATP carrier of mitochondria is highly suitable for elucidating the mechanism of this catalysis due to its unique qualities such as great abundance in higher cells, easy isolation in native state by detergents, existence of inhibitors specific for either the in- or outward looking binding site and direct observation of a carrier-substrate complex. As central catalytic steps, the reorientation of the substrate-binding site at the carrier during translocation across the membrane could be demonstrated at the intact membrane and the isolated protein. The results are interpreted by the gated-pore mechanism where two subunits form a gate with a central binding site which radically change conformation and specificity on transition from one to the other side of the membrane.
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Schackmann RW, Eddy EM, Shapiro BM. The acrosome reaction of Strongylocentrotus purpuratus sperm. Ion requirements and movements. Dev Biol 1978; 65:483-95. [PMID: 680373 DOI: 10.1016/0012-1606(78)90043-x] [Citation(s) in RCA: 207] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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49
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Braughler JM, Corder CN. Reversible in activation of purified (Na+ + K+)-ATPase from human renal tissue by cyclic AMP-dependent protein kinase. BIOCHIMICA ET BIOPHYSICA ACTA 1978; 524:455-65. [PMID: 208625 DOI: 10.1016/0005-2744(78)90184-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Human renal (Na+ + K+)-ATPase (ATP phosphohydrolase, EC 3.6.1.3) preparations which exhibited a non-linear reaction rate, contained high levels of membrane-bound cyclic AMP-dependent protein kinase, while this latter activity was much less or absent in purified preparations. A non-linear reaction rate was observed in a purified preparation of (Na+ + K+)-ATPase by reconstituting the enzyme into lipid vesicles with cyclic AMP-dependent protein kinase. The addition of cyclic AMP to the ATPase assay of these lipid vesicles inactivated the (Na+ + K+)-ATPase. The cytoplasmic fraction of the cell contained a nondialyzable factor, which prevented (or reversed) the cyclic AMP-mediated inactivation of the enzyme.
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Hossler FE, Sarras MP, Allen ER. Ultrastructural, cyto- and biochemical observations during turnover of plasma membrane in duck salt gland. Cell Tissue Res 1978; 188:299-315. [PMID: 148323 DOI: 10.1007/bf00222639] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The mechanism of plasma membrane turnover was investigated using the duckling salt gland as a model system. Feeding fresh water to salt-stressed ducklings results in a decrease in the Na, K-ATPase in salt gland to non-stressed levels in about 7 days, as measured by ATP hydrolysis and 3H-ouabain binding. Electron micrographs reveal that this is accompanied by a decrease in plasma membrane infoldings on the basal and lateral borders of gland secretory cells. Simultaneously there is an increase in filamentous material and a rise in acid phosphatase and peptidase activities in these cells. Cytochemistry shows that the acid phosphatase activity is mostly associated with the basal or basolateral regions of secretory cells. These ovservations could indicate that the removal of plasma membrane components is accomplished by internalization and digestion within the secretory cells.
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