Search results for "Protein Complex"

showing 4 items of 154 documents

Truncated recombinant light harvesting complex II proteins are substrates for a protein kinase associated with photosystem II core complexes

1998

AbstractPrevious studies directed towards understanding phosphorylation of the chlorophyll a/b binding proteins comprising light harvesting complex II (LHC II) have concentrated on a single phosphorylation site located close to the N-terminus of the mature proteins. Here we show that a series of recombinant pea Lhcb1 proteins, each missing an N-terminal segment including this site, are nevertheless phosphorylated by a protein kinase associated with a photosystem II core complex preparation. An Lhcb1 protein missing the first 58 amino acid residues is not, however, phosphorylated. The results demonstrate that the LHC II proteins are phosphorylated at one or more sites, the implications of wh…

inorganic chemicalsPhotosystem IIMacromolecular SubstancesMolecular Sequence DataPhotosynthetic Reaction Center Complex ProteinsLight-Harvesting Protein ComplexesBiophysicsmacromolecular substancesBiologyBiochemistryDNA-binding proteinProtein kinaseThylakoid membraneSubstrate Specificitylaw.inventionStructural BiologylawGeneticsProtein phosphorylationAmino Acid SequencePhosphorylationProtein kinase AMolecular BiologyPlant ProteinsKinasePeasPeaPhotosystem II Protein Complexfood and beveragesCell BiologySpinachPeptide FragmentsRecombinant Proteinsenzymes and coenzymes (carbohydrates)BiochemistryThylakoidRecombinant DNALight harvesting proteinPhosphorylationbacteriaCarrier ProteinsProtein KinasesFEBS Letters
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Antiapoptotic effect of calcitonin gene-related peptide on oxidative stress-induced injury in H9c2 cardiomyocytes via the RAMP1/CRLR complex.

2005

Calcitonin gene-related peptide (CGRP) plays an important role in the mediation of protective effects observed in situations such as ischemic preconditioning in rat hearts. In this study, we investigated in H9c2 rat cardiomyoblasts if the protective effect of CGRP could be linked to an inhibitory effect on the apoptotic pathway. We also determined the specificity of observed effects by treatment with adrenomedullin (ADM) in stress conditions generated by 100 microM hydrogen peroxide. Using MTT assays, we demonstrate that a pretreatment with CGRP decreases by half the loss of cell viability induced by H(2)O(2). CGRP inhibits phosphatidylserine externalization, caspase 3 activation and DNA fr…

medicine.medical_specialtyCalcitonin Gene-Related PeptideCaspase 3DNA FragmentationCalcitonin gene-related peptideReceptor Activity-Modifying Protein 2Receptor Activity-Modifying Protein 3Receptor Activity-Modifying ProteinsCell LineReceptor Activity-Modifying Protein 1Internal medicinemedicineAnimalsMyocytes CardiacViability assayMolecular BiologyReceptor activity-modifying proteinintegumentary systemChemistryCalcitonin Receptor-Like ProteinIntracellular Signaling Peptides and ProteinsMembrane ProteinsReceptors CalcitoninPeptide FragmentsRatsAdrenomedullinOxidative StressEndocrinologyGene Expression RegulationRAMP2ApoptosisRAMP1Multiprotein ComplexesIschemic Preconditioning MyocardialCardiology and Cardiovascular MedicineMioticsSignal TransductionJournal of molecular and cellular cardiology
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Dystroglycan regulates structure, proliferation and differentiation of neuroepithelial cells in the developing vertebrate CNS.

2007

AbstractIn the developing CNS α- and β-dystroglycan are highly concentrated in the endfeet of radial neuroepithelial cells at the contact site to the basal lamina. We show that injection of anti-dystroglycan Fab fragments, knockdown of dystroglycan using RNAi, and overexpression of a dominant-negative dystroglycan protein by microelectroporation in neuroepithelial cells of the chick retina and optic tectum in vivo leads to the loss of their radial morphology, to hyperproliferation, to an increased number of postmitotic neurons, and to an altered distribution of several basally concentrated proteins. Moreover, these treatments also altered the oriented growth of axons from retinal ganglion c…

musculoskeletal diseasesCentral Nervous Systemcongenital hereditary and neonatal diseases and abnormalitiesmedicine.medical_specialtySuperior Colliculianimal structuresCellular differentiationNeuroepithelial CellsStem cellsDevelopmentDystrophin-associated protein complexRetinal ganglionAxonal growthMuscular DystrophiesRetina03 medical and health sciences0302 clinical medicineInternal medicineDystroglycanmedicineAnimalsDystroglycansMolecular BiologyCell Shape030304 developmental biologyCell Proliferation0303 health sciencesRetinabiologyfungiCell DifferentiationCell BiologyMuscular dystrophymusculoskeletal systemCell biologyNeuroepithelial cellmedicine.anatomical_structureEndocrinologyRNAiVertebratesbiology.proteinBasal laminaPikachurinStem cellChickens030217 neurology & neurosurgeryDevelopmental BiologyDevelopmental biology
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Predictive First-principles Modeling of a Photosynthetic Antenna Protein : The Fenna-Matthews-Olson Complex

2020

High efficiency of light harvesting in photosynthetic pigment-protein complexes is governed by evolutionary-perfected protein-assisted tuning of individual pigment properties and inter-pigment interactions. Due to the large number of spectrally overlapping pigments in a typical photosynthetic complex, experimental methods often fail to unambiguously identify individual chromophore properties. Here we report a first principles-based modeling protocol capable of predicting properties of pigments in protein environment to a high precision. The technique was applied to successfully uncover electronic properties of the Fenna-Matthews-Olson (FMO) pigment-protein complex. Each of the three subunit…

polarizable embeddingmallintaminenpigment-protein complexQM/EFPeffective fragment potentialspektroskopiaFenna-Matthews-Olson proteinproteiinitQM/MMpigmentit (värijauheet)
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