0000000000549032

AUTHOR

Lucie Bertheau

showing 3 related works from this author

Automatic Counting of Intra-Cellular Ribonucleo-Protein Aggregates in Saccharomyces cerevisiae Using a Textural Approach.

2019

AbstractIn the context of microbiology, recent studies show the importance of ribonucleo-protein aggregates (RNPs) for the understanding of mechanisms involved in cell responses to specific environmental conditions. The assembly and disassembly of aggregates is a dynamic process, the characterization of the stage of their evolution can be performed by the evaluation of their number. The aim of this study is to propose a method to automatically determine the count of RNPs. We show that the determination of a precise count is an issue by itself and hence, we propose three textural approaches: a classical point of view using Haralick features, a frequency point of view with generalized Fourier…

CytoplasmSaccharomyces cerevisiae ProteinsZernike polynomialsComputer scienceSaccharomyces cerevisiaeGreen Fluorescent Proteins0211 other engineering and technologiessub-cellular structuresContext (language use)02 engineering and technologySaccharomyces cerevisiaeProtein aggregationribonucleo-protein aggregatesCytoplasmic GranulesModels BiologicalPoly(A)-Binding Proteins03 medical and health sciencessymbols.namesakeProtein Aggregates[SDV.IDA]Life Sciences [q-bio]/Food engineeringGeneralized Fourier descriptorsInstrumentation030304 developmental biology021110 strategic defence & security studies0303 health sciencesFusionHaralickbiologyZernikeA proteinbiology.organism_classificationFourier transformMicroscopy FluorescenceRibonucleoproteinssymbolsBiological systemMicroscopy and microanalysis : the official journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada
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An Off-On-Off Fluorescent Sensor for pH Windows Based on the 13aneN4-Zn 2+ System

2016

International audience; The new ligand L was prepared and features a 13-membered tetraaza macrocyclic ring with a 1,8-naphthalimide fluorophore appended to a C atom of its backbone. The protonation constants of L as well as its complexation constants with Zn2+ ions were determined in 1:1 water/methanol solutions by potentiometric titrations. Fluorimetric pH titrations were performed with L alone and L in the presence of Zn2+ ions (1:1), and the species distributions (%) versus pH were compared. A window-shaped fluorescence trend was observed with pH for the L/Zn2+ system, which behaves as an off-on-off pH sensor. The on window is centred in the 6.5-7.5 pH range, in correspondence with the f…

inorganic chemicalsFluorophorePotentiometric titrationInorganic chemistryProtonationYeast cellsSensors; Fluorescence; Zinc; Yeast cells; Macrocyclic ligands010402 general chemistry01 natural sciencesMicelleFluorescenceInorganic Chemistrychemistry.chemical_compoundMacrocyclic ligandsCyclamLipophilicity[SDV.IDA]Life Sciences [q-bio]/Food engineeringEquilibriaMicellesIonsChemosensors010405 organic chemistryLigandSensorsChelation-enhanced fluorescencezinc[ SDV.IDA ] Life Sciences [q-bio]/Food engineeringMetal-complexesFluorescence0104 chemical scienceschemistryCyclamTitrationMacrocycles
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Metal stresses modify soluble proteomes and toxin profiles in two Mediterranean strains of the distributed dinoflagellate Alexandrium pacificum

2022

WOS:000789651000009; HABs involving Alexandrium pacificum have been reported in metal-contaminated ecosystems, suggesting that this distributed species adapts to and/or can tolerate the effects of metals. Modifications in soluble proteomes and PST contents were characterized in two Mediterranean A. pacificum strains exposed to mono- or polymetallic stresses (zinc, lead, copper, cadmium). These strains were isolated from two anthropized locations: Santa Giusta Lagoon (Italy, SG C10-3) and the Tarragona seaport (Spain, TAR C5-4F). In both strains, metals primarily downregulated key photosynthesis proteins. Metals also upregulated other proteins involved in photosynthesis (PCP in both strains)…

ProteomicsEnvironmental EngineeringProteomeParalytic shellfish toxins[SDE.MCG]Environmental Sciences/Global Changeschemistry.chemical_elementmedicine.disease_causePhotosynthesiscomplex mixturesMicrobiologychemistry.chemical_compoundTar (tobacco residue)BiosynthesismedicineEnvironmental ChemistryWaste Management and DisposalEcosystemCadmiumbiologyStrain (chemistry)Harmful algal bloomToxinChemistryDinoflagellatebiology.organism_classificationPollutionADKMetalsDinoflagellida[SDE.BE]Environmental Sciences/Biodiversity and Ecology
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