Coupling of calcium transport with ATP hydrolysis in scallop sarcoplasmic reticulum.

Coupling of calcium transport with ATP hydrolysis in scallop sarcoplasmic reticulum. Research Abstract Details 

Research Abstract Table of Contents

Jump to the:

Coupling of calcium transport with ATP hydrolysis in scallop sarcoplasmic reticulum. Abstract Text:

Naoko Matsuo,Yoshiaki Nagata,Jun Nakamura,Taibo Yamamoto,

Previously, we showed that incubation of the scallop sarcoplasmic reticulum (SR) with EGTA at above 37 degrees C resulted in the uncoupling of ATP hydrolysis with Ca2+ transport [Nagata et al. (1996) J. Biochem. 119, 1100-1105]. We have extended this study by comparing the kinetic behavior of Ca2+ release and binding to the uncoupled SR with that of intact scallop or rabbit SR. The change in the Ca2+ concentration in the reaction medium, as determined as the absorption of APIII, was followed using a stopped flow system. Intact scallop SR was preincubated with Ca2+ in the presence of a Ca2+ ionophore, A23187, and then ATP was added to initiate the reaction. The Ca2+ level in the medium increased to the maximum level in several seconds, and then slowly decreased to the initial low level. The rising and subsequent slow decay phases could be related to the dissociation and reassociation of Ca2+ with the Ca-ATPase, respectively. When uncoupled scallop SR vesicles were preincubated with CaCl2 in the absence of A23187 and then the reaction was initiated by the addition of ATP, a remarkable amount of Ca2+ was released from the SR vesicles into the cytosolic solution, whereas, with intact scallop or rabbit SR, only a sharp decrease in the Ca2+ level was observed. Based on these findings, we concluded that the heat treatment of scallop SR in EGTA may alter the conformation of the Ca-ATPase, thereby causing Ca2+ to be released from the enzyme, during the catalytic cycle, at the cytoplasmic surface, but not at the lumenal surface of SR vesicles.

Coupling of calcium transport with ATP hydrolysis in scallop sarcoplasmic reticulum. Publishing Authors By Initials

N Matsuo,Y Nagata,J Nakamura,T Yamamoto,

For similar inorganic chemicals: electrolytes: ions: anions: vanadates research abstracts see: inorganic chemicals: electrolytes: ions: anions: vanadates research

PUBMED ID PMID:

MEDLINE DATE:

Coupling of calcium transport with ATP hydrolysis in scallop sarcoplasmic reticulum. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Journal of biochemistry

VOLUME: 131

Page Numbers: 375-81

Journal Abbreviation: J. Biochem.

ISSN: 0021-924X

DAY: 19

MONTH: Mar

YEAR: 2002

Coupling of calcium transport with ATP hydrolysis in scallop sarcoplasmic reticulum. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 376600

Coupling of calcium transport with ATP hydrolysis in scallop sarcoplasmic reticulum. Keywords Mesh Terms:

KEYWORDS: Vanadates

MESH TERMS: pharmacology

Chemical & Substance for Abstract: Coupling of calcium transport with ATP hydrolysis in scallop sarcoplasmic reticulum. Information

Substance Name: Calcium-Transporting ATPases

Registry Number: EC 3.6.1.8

Grant and Affiliation Information for Coupling of calcium transport with ATP hydrolysis in scallop sarcoplasmic reticulum.

AFFILIATION: Department of Biology, Graduate School of Science, Osaka University, Machikaneyama, Toyonaka, Osaka 560-0043, Japan.

Country: Japan

AGENCY:

GRANT:

ACRONYM:

MEDLINETA: J Biochem

REFSOURCE:

DATABASENAME:

ACCESSION NUMBER:

Number Hits: 0

Coupling of calcium transport with ATP hydrolysis in scallop sarcoplasmic reticulum Related Publications

• CO2-enhanced sonographically guided radiofrequency ablation and transcatheter arterial chemoembolization for small hepatocellular carcinoma poorly defined on conventional sonography.
• Contested dominance modifies the anovulatory consequences of social subordination in female marmosets.
• Decreased fractal correlation in diurnal physical activity in chronic fatigue syndrome.
• Descriptive study of gallbladder, extrahepatic bile duct, and ampullary cancers in the United States, 1997-2002.
• Diastereo- and enantioselective synthesis of nitroso Diels-Alder-type bicycloketones using dienamine: mechanistic insight into sequential nitroso Aldol/Michael reaction and application for optically pure 1-amino-3,4-diol synthesis.
• Drosophila CTLA-2-like protein (D/CTLA-2) inhibits cysteine proteinase 1 (CP1), a cathepsin L-like enzyme.
• Dynamic changes in vesicular glutamate transporter 1 function and expression related to methamphetamine-induced glutamate release.
• Effects of bilateral jugular vein ligation on local cerebral blood flow.
• Effects of brain lesions on taste-potentiated odor aversion in rats.
• Effects of chronic unpredictable stress and methamphetamine on hippocampal glutamate function.
• Evaluation of osteogenic/chondrogenic cellular proliferation and differentiation in the xenogeneic periosteal graft.
• Gene expression signatures that can discriminate oral leukoplakia subtypes and squamous cell carcinoma.
• Haloperidol treatment after high-dose methamphetamine administration is excitotoxic to GABA cells in the substantia nigra pars reticulata.
• Imaging of Regional Differences of Muscle Oxygenation during Exercise Using Spatially Resolved NIRS.
• Interactions between methamphetamine and environmental stress: role of oxidative stress, glutamate and mitochondrial dysfunction.
• Intraoperative electro-oculographic Monitoring for Skull Base Surgery.
• Involvement of the Mesolimbic System in Palatability-induced Ingestion.
• Ketamine and N-acetylaspartylglutamate peptidase inhibitor exert analgesia in bone cancer pain.
• Kinetic mechanism of the fastest motor protein, Chara myosin.
• Loss of the TOR kinase Tor2 mimics nitrogen starvation and activates the sexual development pathway in fission yeast.
• Menatetrenone, a vitamin K2 analogue, inhibits hepatocellular carcinoma cell growth by suppressing cyclin D1 expression through inhibition of nuclear factor kappaB activation.
• Myostatin modulates adipogenesis to generate adipocytes with favorable metabolic effects.
• Negative regulation of BMP/Smad signaling by Tob in osteoblasts.
• Prior exposure to chronic stress and MDMA potentiates mesoaccumbens dopamine release mediated by the 5-HT(1B) receptor.
• Regulation of Wnt signalling by receptor-mediated endocytosis.
• Simultaneous gene transfer of bone morphogenetic protein (BMP) -2 and BMP-7 by in vivo electroporation induces rapid bone formation and BMP-4 expression.
• The Role of Orexigenic Neuropeptides in the Ingestion of Sweet-tasting Substances in Rats.
• The relationship between cerebral blood flow and cognitive function in patients with brain insult of various etiology.
• The use of polylactic acid/polyglycolic acid copolymer and gelatin sponge complex containing human recombinant bone morphogenetic protein-2 following condylectomy in rabbits.
• Trehalose Sensitivity of the Gustatory Receptor Neurons Expressing Wild-type, Mutant and Ectopic Gr5a in Drosophila.