Abstract：
:Electrophorus electroplax microsomes were examined for Ca2+- and Mg2+-dependent ATPase activity. In addition to the previously reported low-affinity ATPase, a high-affinity (Ca2+,Mg2+)-ATPase was found. At low ATP and Mg2+ concentrations (200 microM or less), the high-affinity (Ca2+,Mg2+)-ATPase exhibits an activity of 18 nmol Pi mg-1 min-1 with 0.58 microM Ca2+. At higher ATP concentrations (3 mM), the low-affinity Ca2+-ATPase predominates, with an activity of 28 nmol Pi mg-1 min-1 with 1 mM Ca2+. In addition, Mg2+ can also activate the low-affinity ATPase (18 nmol Pi mg-1 min-1). The high-affinity ATPase hydrolyzes ATP at a greater rate than it does GTP, ITP, or UTP and is insensitive to ouabain, oligomycin, or dicyclohexylcarbodiimide inhibition. The high-affinity enzyme is inhibited by vanadate, trifluoperazine, and N-ethylmaleimide. Added calmodulin does not significantly stimulate enzyme activity; rinsing the microsomes with EGTA does not confer calmodulin sensitivity. Thus the high-affinity ATPase from electroplax microsomes is similar to the (Ca2+,Mg2+)-ATPase reported to be associated with Ca2+ transport, based on its affinity for calcium and its response to inhibitors. The low-affinity enzyme hydrolyzes all tested nucleoside triphosphates, as well as diphosphates, but not AMP. Vanadate and N-ethylmaleimide do not inhibit the low-affinity enzymes. The low-affinity enzyme reflects a nonspecific nucleoside triphosphatase, probably an ectoenzyme.
journal_name
J Neurochemjournal_title
Journal of neurochemistryauthors
Amende LM,Chock SP,Albers RWdoi
10.1111/j.1471-4159.1983.tb08090.xsubject
Has Abstractpub_date
1983-04-01 00:00:00pages
1040-7issue
4eissn
0022-3042issn
1471-4159journal_volume
40pub_type
杂志文章abstract：:Neuronal nicotinic acetylcholine receptors are differentially sensitive to blockade by the competitive antagonist dihydro-beta-erythroidine. Both alpha and beta subunits participate in determining sensitivity to this antagonist. The alpha subunit contribution to dihydro-beta-erythroidine sensitivity is illustrated by ...
journal_title：Journal of neurochemistry
pub_type： 杂志文章
doi：10.1046/j.1471-4159.1996.67051953.x
更新日期：1996-11-01 00:00:00
abstract：:The glutamine cycle has been proposed as a pathway in which glutamine synthesized in glia provides substrate for synthesis of the neurotransmitters glutamate and GABA as they are lost from neurons. To test whether GABA may regulate this pathway, the effect of elevated GABA on the glial enzyme glutamine synthetase was ...
journal_title：Journal of neurochemistry
pub_type： 杂志文章
doi：10.1046/j.1471-4159.1995.65010355.x
更新日期：1995-07-01 00:00:00
abstract：:Previously we found close similarities between high-affinity binding sites for [3H]cocaine and those for [3H]imipramine in the mouse cerebral cortex in regard to their association with neuronal uptake of serotonin. In the present study we investigated whether the two ligands bind to the same site. The two ligands had ...
journal_title：Journal of neurochemistry
pub_type： 杂志文章
doi：10.1111/j.1471-4159.1984.tb06703.x
更新日期：1984-07-01 00:00:00
abstract：:Variations occurring in cortical nitric oxide (NO) release were analysed with a voltametric method in rats (i) placed in control conditions, (ii) while being paradoxical sleep deprived (PSD), or (iii) recovering from a PSD. Activities of neuronal (nNOS) and inducible (iNOS) NO-synthases as well as nNOS expression were...
journal_title：Journal of neurochemistry
pub_type： 杂志文章
doi：10.1111/j.1471-4159.2004.02529.x
更新日期：2004-08-01 00:00:00
abstract：:The thermodynamic parameters associated with the interactions of agonists and antagonists with glycine receptors in rat spinal cord membranes were determined. The binding of the antagonist [3H]strychnine and the inhibition of strychnine binding by 11 different glycinergic ligands were examined at temperatures between ...
journal_title：Journal of neurochemistry
pub_type： 杂志文章
doi：10.1111/j.1471-4159.1989.tb07256.x
更新日期：1989-06-01 00:00:00
abstract：:We previously showed that Nuclear Factor kappaB (NF-kappaB) inactivation in astrocytes leads to improved functional recovery following spinal cord injury (SCI). This correlated with reduced expression of pro-inflammatory mediators and chondroitin sulfate proteoglycans, and increased white matter preservation. Hence we...
journal_title：Journal of neurochemistry
pub_type： 杂志文章
doi：10.1111/j.1471-4159.2009.06190.x
更新日期：2009-07-01 00:00:00
abstract：:Neurodegenerative diseases, such as Parkinson's disease, Alzheimer's disease, and Huntington's disease, are considered incurable and significantly reduce the quality of life of the patients. A variety of drugs that modulate neurotransmitter levels have been used for the treatment of the neurodegenerative diseases but ...
journal_title：Journal of neurochemistry
pub_type： 杂志文章
doi：10.1111/jnc.14815
更新日期：2019-10-01 00:00:00
abstract：:A protein that binds vesamicol has been purified from a soluble fraction of the Torpedo electric organ homogenate that does not contain synaptic vesicles. The purified vesamicol-binding protein (VBP) has a molecular mass of 470 kDa composed of 30- and 24-kDa subunits. Chemical deglycosylation yielded a single, heterog...
journal_title：Journal of neurochemistry
pub_type： 杂志文章
doi：10.1111/j.1471-4159.1991.tb03780.x
更新日期：1991-08-01 00:00:00
abstract：:The inhibitors of apoptosis (IAPs) are emerging as key proteins in the control of cell death. In this study, we evaluated the expression and subcellular distribution of the antiapoptotic protein X-linked IAP (XIAP), and its interactions with the XIAP-associated factor 1 (XAF1) in neonatal rat brain following hypoxia-i...
journal_title：Journal of neurochemistry
pub_type： 杂志文章
doi：10.1111/j.1471-4159.2008.05482.x
更新日期：2008-08-01 00:00:00
abstract：:Previous studies from this laboratory have shown that synthesis of GT3, the precursor of c series gangliosides, occurs in proximal Golgi compartments, as has been shown for the synthesis of GM3 and GD3, the precursors of a and b series gangliosides, respectively. In this work we studied whether the synthesis of GM3, G...
journal_title：Journal of neurochemistry
pub_type： 杂志文章
doi：10.1046/j.1471-4159.1996.67041393.x
更新日期：1996-10-01 00:00:00
abstract：:The K+-stimulated efflux of endogenous taurine from primary rat cerebellar astrocyte cultures prepared from 7-9-day-old rats was studied at 16-18 days in vitro using HPLC analysis. Taurine efflux was dose-dependent at K+ concentrations between 10 mM and 80 mM, with an EC50 of approximately 50 mM. Maximum stimulation o...
journal_title：Journal of neurochemistry
pub_type： 杂志文章
doi：10.1111/j.1471-4159.1988.tb04844.x
更新日期：1988-07-01 00:00:00
abstract：:Chromogranin A and two other proteins (A1 and A2) of the soluble proteins of bovine chromaffin granules were isolated by extraction from polyacrylamide gels after electrophoresis. The carbohydrate content of these proteins was 5%, with galactose, N-acetylgalactosamine, and sialic acid as the main sugars. Membranes of ...
journal_title：Journal of neurochemistry
pub_type： 杂志文章
doi：10.1111/j.1471-4159.1982.tb08691.x
更新日期：1982-03-01 00:00:00
abstract：:We investigated the role of Ca(2+)-dependent protein kinases in the regulation of astrocytic cell volume. Calmodulin (CaM) antagonists were used to inhibit CaM and thus Ca2+/CaM-dependent protein kinase. The effect of these inhibitors as well as activators and inhibitors of protein kinase C (PKC) on astrocytic volume ...
journal_title：Journal of neurochemistry
pub_type： 杂志文章
doi：10.1111/j.1471-4159.1992.tb10064.x
更新日期：1992-05-01 00:00:00
abstract：:The murine neuroblastoma N1E-115 cell line possesses a high density of angiotensin II (AngII) receptors that can be solubilized with the zwitterionic detergent 3-[(3-cholamidopropyl)dimethylammonio]-1-propanesulfonate. These solubilized binding sites exhibited high affinity for CGP-42112A and not Losartan, indicating ...
journal_title：Journal of neurochemistry
pub_type： 杂志文章
doi：10.1046/j.1471-4159.1994.62062106.x
更新日期：1994-06-01 00:00:00
abstract：:The aim of the present study was to gain a deeper insight into the cell signaling pathways involved in the neuroprotection/neurorescue activity of the major green tea polyphenol (-)-epigallocatechin-3-gallate (EGCG). EGCG (1 micro m) caused an immediate (30 min) down-regulation (approximately 40%) of Bad protein level...
journal_title：Journal of neurochemistry
pub_type： 杂志文章
doi：10.1111/j.1471-4159.2006.04265.x
更新日期：2007-02-01 00:00:00
abstract：:Increasing reports support that air pollution causes neuroinflammation and is linked to central nervous system (CNS) disease/damage. Diesel exhaust particles (DEP) are a major component of urban air pollution, which has been linked to microglial activation and Parkinson's disease-like pathology. To begin to address ho...
journal_title：Journal of neurochemistry
pub_type： 杂志文章
doi：10.1111/jnc.12231
更新日期：2013-06-01 00:00:00
abstract：:Recent evidence indicates that tyrosine phosphorylation may play important roles in retinal photoreceptor rod outer segments (ROS). We investigated the tyrosine phosphorylation of endogenous proteins in isolated bovine ROS. Several proteins with apparent molecular masses of 31, 39, 60, 83, 90, 97, 120, 140, and 180 kD...
journal_title：Journal of neurochemistry
pub_type： 杂志文章
doi：10.1046/j.1471-4159.2000.0752006.x
更新日期：2000-11-01 00:00:00
abstract：:The choline acetyltransferase (ChAT) reaction involves the transfer of the acetyl group of acetyl-CoA to choline, in which an active site histidine is believed to act as a general acid/base catalyst. A comparison of the deduced amino acid sequences of the enzyme from Drosophila, pig, rat, and Caernohabditis elegans re...
journal_title：Journal of neurochemistry
pub_type： 杂志文章
doi：10.1111/j.1471-4159.1993.tb03561.x
更新日期：1993-07-01 00:00:00
abstract：:We have introduced a series of point mutations into the human opioid receptor-like (ORL1) receptor and characterized them for their ability to constitutively activate G protein-coupled receptor signalling pathways. Among the 12 mutants generated, mutation at Asn133 (N133W) gave increased basal signalling through three...
journal_title：Journal of neurochemistry
pub_type： 杂志文章
doi：10.1046/j.1471-4159.2002.01231.x
更新日期：2002-12-01 00:00:00
abstract：:Antisera raised to the 68,000, 145,000 and 200,000 molecular weight subunits of rat neurofilaments were used for immunochemical staining of polypeptides separated by one- and two-dimensional gel electrophoresis. It was found that each antiserum reacts intensely with its corresponding neurofilament subunit and weakly w...
journal_title：Journal of neurochemistry
pub_type： 杂志文章
doi：10.1111/j.1471-4159.1981.tb04676.x
更新日期：1981-11-01 00:00:00
abstract：:We assessed the functional expression of the norepinephrine (NE) transporter (NET) in cultured rat cortical astrocytes. Specific [3H]NE uptake increased in a time-dependent manner, and this uptake involves temperature- and Na+-sensitive mechanisms. The Na+-dependent [3H]NE uptake was saturable, and the Km for the proc...
journal_title：Journal of neurochemistry
pub_type： 杂志文章
doi：10.1046/j.1471-4159.2003.01514.x
更新日期：2003-01-01 00:00:00
abstract：:It has been suggested that release of cytochrome c (Cyt c) from mitochondria during apoptotic death is through opening of the mitochondrial permeability transition pore followed by swelling-induced rupture of the mitochondrial outer membrane. However, this remains controversial and may vary with cell type and model sy...
journal_title：Journal of neurochemistry
pub_type： 杂志文章
doi：10.1046/j.1471-4159.2002.01049.x
更新日期：2002-09-01 00:00:00
abstract：:Axonal degeneration is a key component of many neurodegenerative diseases. Injured axons undergo a program of self-destruction termed Wallerian degeneration that is an active, well-regulated process. The pathways leading to axon fragmentation are uncharacterized, but experiments with wld(s) mutant mice led to the disc...
journal_title：Journal of neurochemistry
pub_type： 杂志文章
doi：10.1111/j.1471-4159.2009.06002.x
更新日期：2009-04-01 00:00:00
abstract：:Activation of metabotropic glutamate receptors (mGluRs) in glia results in significant physiological effects for both the glia and the neighboring neurons; but in many cases, the mGluR subtypes and signal transduction mechanisms mediating these effects have not been determined. In this study, we report that mGluR acti...
journal_title：Journal of neurochemistry
pub_type： 杂志文章
doi：10.1046/j.1471-4159.1998.71020603.x
更新日期：1998-08-01 00:00:00
abstract：:Cystatin C, a well-established biomarker of renal function, has been associated with a protective effect against stroke. However, the potential neuroprotective mechanism of cystatin C in ischemic brain injury remains unclear. Our study hypothesized that cystatin C can ameliorate blood-brain barrier (BBB) disruption by...
journal_title：Journal of neurochemistry
pub_type： 杂志文章
doi：10.1111/jnc.14894
更新日期：2020-05-01 00:00:00
abstract：:The somatodendritic release of dopamine in substantia nigra previously has been suggested to be nonvesicular in nature and thus to differ from the classical, exocytotic release of dopamine described for the dopaminergic nerve terminal in striatum. We have compared the effects of reserpine, a compound that disrupts ves...
journal_title：Journal of neurochemistry
pub_type： 杂志文章
doi：10.1046/j.1471-4159.1995.65010192.x
更新日期：1995-07-01 00:00:00
abstract：:Over the last two decades, a number of studies have underlined the importance of lysosomal-based degradative pathways in maintaining the homeostasis of post-mitotic cells, and revealed the remarkable contribution of a functional autophagic machinery in the promotion of longevity. In contrast, defects in the clearance ...
journal_title：Journal of neurochemistry
pub_type： 杂志文章,评审
doi：10.1111/jnc.14908
更新日期：2020-02-01 00:00:00
abstract：:The current study used an ethanol antagonist, increased atmospheric pressure, to test the hypothesis that ethanol acts on multiple sites in glycine receptors (GlyRs). The effects of 12 times normal atmospheric pressure of helium-oxygen gas (pressure) on ethanol-induced potentiation of GlyR function in Xenopus oocytes ...
journal_title：Journal of neurochemistry
pub_type： 杂志文章
doi：10.1111/j.1471-4159.2004.02390.x
更新日期：2004-06-01 00:00:00
abstract：:alpha-Conotoxins interact with nicotinic acetylcholine receptors (nAChRs) and acetylcholine-binding proteins (AChBPs) at the sites for agonists/competitive antagonists. alpha-Conotoxins blocking muscle-type or alpha7 nAChRs compete with alpha-bungarotoxin. However, alpha-conotoxin ImII, a close homolog of the alpha7 n...
journal_title：Journal of neurochemistry
pub_type： 杂志文章
doi：10.1111/j.1471-4159.2009.06359.x
更新日期：2009-11-01 00:00:00
abstract：:The effect of phorbol esters was investigated on the down-regulation of protein kinase C (PKC) and on the release of [3H]norepinephrine (NE) in synaptosomes from the rat cerebrum. Treatment with 12-O-tetradecanoylphorbol 13-acetate (TPA) promoted the translocation of PKC activity in a P2 fraction from the cytosol to t...
journal_title：Journal of neurochemistry
pub_type： 杂志文章
doi：10.1111/j.1471-4159.1991.tb11420.x
更新日期：1991-04-01 00:00:00
