1997
A Biophysical Study of Integral Membrane Protein Folding †
Hunt J, Earnest T, Bousché O, Kalghatgi K, Reilly K, Horváth C, Rothschild K, Engelman D. A Biophysical Study of Integral Membrane Protein Folding †. Biochemistry 1997, 36: 15156-15176. PMID: 9398244, DOI: 10.1021/bi970146j.Peer-Reviewed Original ResearchMeSH KeywordsAmidesAmino Acid SequenceCircular DichroismMass SpectrometryMembrane ProteinsMolecular Sequence DataProtein FoldingProtein Structure, SecondarySpectroscopy, Fourier Transform InfraredThermodynamicsConceptsAlpha-helical integral membrane proteinsIntegral membrane proteinsMembrane proteinsIntegral membrane protein foldingMembrane protein foldingNon-native conformationsStable secondary structureCellular chaperonesBiophysical dissectionBeta-sheet structureProtein foldingIndividual polypeptidesBiophysical studiesStructure of bacteriorhodopsinTertiary structureSecondary structureReconstitution protocolsG helicesPolypeptideF helixProteinPhospholipid vesiclesHelixFoldingBacteriorhodopsinSpontaneous, pH-Dependent Membrane Insertion of a Transbilayer α-Helix †
Hunt J, Rath P, Rothschild K, Engelman D. Spontaneous, pH-Dependent Membrane Insertion of a Transbilayer α-Helix †. Biochemistry 1997, 36: 15177-15192. PMID: 9398245, DOI: 10.1021/bi970147b.Peer-Reviewed Original ResearchMeSH KeywordsHydrogen-Ion ConcentrationKineticsLipid BilayersMembrane ProteinsPeptide FragmentsPhospholipidsSolubilitySpectrometry, FluorescenceSpectroscopy, Fourier Transform InfraredThermodynamicsConceptsLipid bilayersIntegral membrane protein bacteriorhodopsinMembrane-spanning regionIntegral membrane proteinsPH-dependent membrane insertionAspartic acid residuesMembrane protein bacteriorhodopsinInsertion reactionMembrane insertionMembrane proteinsAqueous solutionHydrophobic sequenceAqueous bufferPoor solubilityAlpha-helixAcid residuesSignificant solubilityC-helixSpectroscopic assaysΑ-helixSecondary structureProtein bacteriorhodopsinNeutral pHPeptide associatesBilayersStructure of the Transmembrane Cysteine Residues in Phospholamban
Arkin I, Adams P, Brünger A, Aimoto S, Engelman D, Smith S. Structure of the Transmembrane Cysteine Residues in Phospholamban. The Journal Of Membrane Biology 1997, 155: 199-206. PMID: 9050443, DOI: 10.1007/s002329900172.Peer-Reviewed Original ResearchMeSH KeywordsAdenosine TriphosphatasesAnimalsCalcium-Binding ProteinsCysteineMembrane ProteinsModels, MolecularSpectroscopy, Fourier Transform InfraredStatic ElectricitySulfhydryl CompoundsConceptsTransmembrane domainCysteine residuesSide chainsPentameric complexCysteine side chainsTransmembrane cysteine residuesLong α-helixIntrahelical hydrogen bondsBackbone carbonyl oxygenSelective ion channelsPolar side chainsElectrostatic potential fieldCarbonyl oxygenSulfhydryl groupsHydrogen bondsMembrane proteinsWild-type phospholambanVibrational spectraMutagenesis studiesTransmembrane peptidesAlanine substitutionsMolecular dynamicsReticulum membraneElectrostatic calculationsΑ-helix
1996
Fourier transform infrared spectroscopy and site-directed isotope labeling as a probe of local secondary structure in the transmembrane domain of phospholamban
Ludlam C, Arkin I, Liu X, Rothman M, Rath P, Aimoto S, Smith S, Engelman D, Rothschild K. Fourier transform infrared spectroscopy and site-directed isotope labeling as a probe of local secondary structure in the transmembrane domain of phospholamban. Biophysical Journal 1996, 70: 1728-1736. PMID: 8785331, PMCID: PMC1225141, DOI: 10.1016/s0006-3495(96)79735-7.Peer-Reviewed Original ResearchMeSH KeywordsAmino Acid SequenceBiophysical PhenomenaBiophysicsCalcium-Binding ProteinsCarbon IsotopesDeuteriumHumansMembrane ProteinsMolecular Sequence DataMolecular StructurePeptide FragmentsProtein Structure, SecondarySpectroscopy, Fourier Transform InfraredConceptsSite-directed isotope labelingLocal secondary structureIsotope labelingSecondary structureSelective ion channelsTotal reflection Fourier transformPeptide amide groupsAmide IReflection Fourier transformDeuterium/hydrogen exchangeTransmembrane domainMembrane domainsMembrane proteinsTransmembrane orientationAmino acid fragmentSpectroscopic characterizationIon channelsHydrophobic regionAmide carbonylProtein backboneCardiac muscle cellsAmide groupLipid bilayersATPase activityFourier transformCoassembly of Synthetic Segments of Shaker K+ Channel within Phospholipid Membranes †
Peled-Zehavi H, Arkin I, Engelman D, Shai Y. Coassembly of Synthetic Segments of Shaker K+ Channel within Phospholipid Membranes †. Biochemistry 1996, 35: 6828-6838. PMID: 8639634, DOI: 10.1021/bi952988t.Peer-Reviewed Original ResearchConceptsIntegral membrane proteinsOligomerization of proteinsMembrane-embedded segmentsMembrane-mimetic environmentsAlpha-helical contentAlpha-helical structureLipid/peptide molar ratioS4 regionShaker potassium channelSecondary structure studiesResonance energy transfer measurementsPhospholipid membranesZwitterionic phospholipid vesiclesTransmembrane segmentsMembrane proteinsPhospholipid milieuMimetic environmentsSynthetic segmentsFirst repeatS4 sequenceEel sodium channelS4 segmentEnergy transfer measurementsSecondary structure
1995
Structural Model of the Phospholamban Ion Channel Complex in Phospholipid Membranes
Arkin I, Rothman M, Ludlam C, Aimoto S, Engelman D, Rothschild K, Smith S. Structural Model of the Phospholamban Ion Channel Complex in Phospholipid Membranes. Journal Of Molecular Biology 1995, 248: 824-834. PMID: 7752243, DOI: 10.1006/jmbi.1995.0263.Peer-Reviewed Original ResearchConceptsSelective ion conductanceTransmembrane domainAmino acid residuesN-terminal 30 amino acid residuesAcid residuesCircular dichroismPentameric protein complexFull-length proteinC-terminal 22 amino acid residuesPhospholipid membranesIon channel complexTransmembrane helicesProtein complexesPhosphorylation sitesMembrane proteinsIon conductanceCarboxy terminusHelix bundleIon poreReticulum membraneInhibitory complexLong helixPentameric complexSecondary structureProtein