0000000000403465

AUTHOR

Marinus Pilon

showing 3 related works from this author

AtCCS is a functional homolog of the yeast copper chaperone Ccs1/Lys7

2005

AbstractIn plant chloroplasts two superoxide dismutase (SOD) activities occur, FeSOD and Cu/ZnSOD, with reciprocal regulation in response to copper availability. This system presents a unique model to study the regulation of metal-cofactor delivery to an organelle. The Arabidopsis thaliana gene AtCCS encodes a functional homolog to yeast Ccs1p/Lys7p, a copper chaperone for SOD. The AtCCS protein was localized to chloroplasts where it may supply copper to the stromal Cu/ZnSOD. AtCCS mRNA expression levels are upregulated in response to Cu-feeding and senescence. We propose that AtCCS expression is regulated to allow the most optimal use of Cu for photosynthesis.

0106 biological sciencesCu/Zn superoxide dismutaseChloroplastsSaccharomyces cerevisiae ProteinsMolecular Sequence DataArabidopsisBiophysicsSaccharomyces cerevisiaeMetallo chaperoneChloroplastModels Biological01 natural sciencesBiochemistryGreen fluorescent proteinSuperoxide dismutase03 medical and health sciencesDownregulation and upregulationGene Expression Regulation PlantStructural BiologyOrganelleGeneticsAmino Acid SequenceRNA MessengerMolecular BiologyGene030304 developmental biology0303 health sciencesbiologyArabidopsis ProteinsGene Expression ProfilingGenetic Complementation TestCell BiologyYeastChloroplastProtein TransportBiochemistryChaperone (protein)Mutationbiology.proteinSequence AlignmentCopperMolecular Chaperones010606 plant biology & botanyFEBS Letters
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Higher plants possess two different types of ATX1-like copper chaperones.

2007

Abstract Copper (Cu) chaperones constitute a family of small Cu+-binding proteins required for Cu homeostasis in eukaryotes. The ATX1 family of Cu chaperones specifically delivers Cu to heavy metal P-type ATPases. The plant Arabidopsis thaliana expresses the ATX1-like Cu chaperone CCH, which exhibits a plant-specific carboxy-terminal domain (CTD) with unique structural properties. We show that CCH homologues from other higher plants contain CTDs with structural properties similar to Arabidopsis CCH. Furthermore, we identify a new ATX1-like Cu chaperone in Arabidopsis, AtATX1, which functionally complements yeast atx1Δ and sod1Δ associated phenotypes, and localizes to the cytosol of Arabidop…

endocrine systemATPaseTwo-hybrid screeningBiophysicsArabidopsischemistry.chemical_elementBiochemistryArabidopsisMolecular BiologyAdenosine TriphosphatasesbiologyArabidopsis ProteinsCell BiologyHistone-Lysine N-Methyltransferasebiology.organism_classificationPhenotypeCopperYeastProtein Structure TertiaryCytosolBiochemistrychemistryChaperone (protein)biology.proteinCopperGenome PlantMolecular ChaperonesTranscription FactorsBiochemical and biophysical research communications
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Expression of the Intracellular COPT3-Mediated Cu Transport Is Temporally Regulated by the TCP16 Transcription Factor

2018

[EN] Copper is an essential element in plants. When scarce, copper is acquired from extracellular environment or remobilized from intracellular sites, through members of the high affinity copper transporters family COPT located at the plasma membrane and internal membrane, respectively. Here, we show that COPT3 is an intracellular copper transporter, located at a compartment of the secretory pathway, that is mainly expressed in pollen grains and vascular bundles. Contrary to the COPT1 plasma membrane member, the expression of the internal COPT3 membrane transporter was higher at 12 h than at 0 h of a neutral photoperiod day under copper deficiency. The screening of a library of conditionall…

0106 biological sciences0301 basic medicineMutantchemistry.chemical_elementPlant Sciencelcsh:Plant culture01 natural sciencesTCP1603 medical and health sciencesTranscriptional regulationGene expressionBIOQUIMICA Y BIOLOGIA MOLECULARExtracellularmedicinelcsh:SB1-1110COPT3transcriptional regulationheavy metalsTranscription factorSecretory pathwayOriginal ResearchCopper transportmedicine.diseaseCopperCell biology030104 developmental biologyHeavy metalschemistrycopper transportCopper deficiencyIntracellular010606 plant biology & botanyFrontiers in Plant Science
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