Výsledky vyhledávání - "Odile M. Viratelle"

Interaction of doxorubicin with ATP: quantification of complexes and effect on its diffusion into DNA-loaded liposomes--implication for ATP-driven transport studies

Autor: Marc Chambon, Odile M. Viratelle

Publikováno v: Analytical biochemistry. 263(2)

Doxorubicin, a drug largely used in chemotherapy, is transported by P-glycoprotein, a protein involved in the multidrug-resistance phenotype. Taking advantage of the doxorubicin fluorescence quenching upon interaction with DNA, a sensitive assay of t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f26c7068cc3b8aef819d2354fff4a18b
https://pubmed.ncbi.nlm.nih.gov/9799532

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Platelet membrane phosphatidylinositol kinase activity. Triton X-100 effects provide evidence for intramicellar reaction

Autor: David Boué, Odile M. Viratelle

Publikováno v: Biochimica et biophysica acta. 1103(1)

Phosphatidylinositol (PI) kinase activity of platelet membranes was solubilized and partially purified by anion-exchange chromatography to measure the initial enzymatic rates. Kinetic studies were performed in the presence of Triton X-100 to obtain m

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::793022d36097cc55200b420ffd1cd65c
https://pubmed.ncbi.nlm.nih.gov/1309657

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Functional properties of beta-galactosidase from mutant strain 13 PO of Escherichia coli

Autor: Patrick Deschavanne, Odile M. Viratelle, Jeannine M. Yon

Publikováno v: Proceedings of the National Academy of Sciences. 75:1892-1896

The functional properties of CZP protein, a mutant deriving from wild-type beta-galactosidase (beta-D-galactoside galactohydrolase; EC 3.2.1.23) by a point mutation, were investigated. A large decrease of the specificity, as evaluated by the kcat/Km

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https://doi.org/10.1073/pnas.75.4.1892

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Radioimmunoassay of cyclic AMP can provide a highly sensitive assay for adenylate cyclase, even at very high ATP concentrations

Autor: Michel A. Delaage, Tobias T. Volker, Odile M. Viratelle, Julie Labouesse

Publikováno v: Analytical Biochemistry. 144:347-355

Modifications of the cyclic AMP radioimmunoassay of Cailla et al. [in Hormones and Cell Regulation (J. Dumont and J. Nunez, eds.), Vol. 4, pp. 1–24, Elsevier/North-Holland, Amsterdam/New York (1980)] allowed its use in the determination of adenylat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1cc5ce433422d751e088612567b36497
https://doi.org/10.1016/0003-2697(85)90127-7

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pH- and Magnesium Ion-Dependence of the Hydrolyses of β-d-Galactopyranosyl Pyridinium Salts Catalysed by Escherichia coli β-Galactosidase

Autor: Stephen G. Withers, Michael L. Sinnott, Odile M. Viratelle

Publikováno v: Biochemical Society Transactions. 3:1006-1009

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0cdf18696891f04c9e58eb69eb36d0cb
https://doi.org/10.1042/bst0031006

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The effect of methanol and dioxan on the rates of the β-galactosidase-catalysed hydrolyses of some β-d-galactopyranosides: rate-limiting degalactosylation. The pH-dependence of galactosylation and degalactosylation

Autor: Michael L. Sinnott, Odile M. Viratelle

Publikováno v: Biochemical Journal. 133:81-87

1. The effect of methanol on the β-galactosidase-catalysed hydrolysis of some nitrophenyl β-d-galactopyranosides has been studied under steady-state conditions. 2. The initial fractional rate of increase of kcat. as a function of methanol concentra

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https://doi.org/10.1042/bj1330081

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pH Dependence of the Activity of beta-Galactosidase from Escherichia coli

Autor: Odile M. Viratelle, Jean-Pierre Tenu, Jean Garnier, Jeannine M. Yon

Publikováno v: European Journal of Biochemistry. 20:363-370

The “specific reactivity” of β-galactosidase from Escherichia coli for different substrates has been studied at the optimal pH value. The pH dependence of the enzyme activity has been reinvestigated in highly controlled conditions with respect t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dd06793c4985b3a6b51f1faa63b0f361
https://doi.org/10.1111/j.1432-1033.1971.tb01402.x

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Kinetic Study of the Activation Process of beta-Galactosidase from Escherichia coli by Mg2+

Autor: Jeannine M. Yon, Odile M. Viratelle, Jean-Pierre Tenu

Publikováno v: European Journal of Biochemistry. 26:112-118

The action of Mg2+ ions on β-galactosidase activity has been studied under strictly controlled conditions with different substrates. The activation effect does not depend on the substrate. In the absence of Mg2+ ions, a residual activity has been fo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1bde62fd081d9a6780d2cc199a3f7b04
https://doi.org/10.1111/j.1432-1033.1972.tb01746.x

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Pseudoconservative transition: a two-state model for the co-operative behavior of oligomeric proteins

Autor: Odile M. Viratelle, François Seydoux

Publikováno v: Journal of molecular biology. 92(2)

A plausible extension of the two-state concerted model is proposed. This extended two-state model involves at least one state with pairwise asymmetry and consequent heterogeneous binding properties. Such a pseudoconservative transition model accounts

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::373b672e61eb02ce8b69db62f416d1e1
https://pubmed.ncbi.nlm.nih.gov/167173

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