2022
On the frequency response of prestin charge movement in membrane patches
Santos-Sacchi J, Tan W. On the frequency response of prestin charge movement in membrane patches. Biophysical Journal 2022, 121: 2371-2379. PMID: 35598044, PMCID: PMC9279172, DOI: 10.1016/j.bpj.2022.05.020.Peer-Reviewed Original Research
2021
Coupling between outer hair cell electromotility and prestin sensor charge depends on voltage operating point
Santos-Sacchi J, Tan WJT. Coupling between outer hair cell electromotility and prestin sensor charge depends on voltage operating point. Hearing Research 2021, 423: 108373. PMID: 34776274, PMCID: PMC9054947, DOI: 10.1016/j.heares.2021.108373.Peer-Reviewed Original ResearchMeSH KeywordsCochleaElectric CapacitanceHair Cells, Auditory, OuterHair Cells, VestibularPatch-Clamp TechniquesConceptsOperating voltage rangeFrequency responseAC voltage excitationSlow frequency responseVoltage operating pointNonlinear capacitanceOperating voltageOperating pointVoltage excitationVoltage rangeSpecial Issue Outer hair cellJoseph Santos-SacchiVoltageKumar NavaratnamLoadVoltage-sensor charge movementState dependent effects on the frequency response of prestin’s real and imaginary components of nonlinear capacitance
Santos-Sacchi J, Navaratnam D, Tan WJT. State dependent effects on the frequency response of prestin’s real and imaginary components of nonlinear capacitance. Scientific Reports 2021, 11: 16149. PMID: 34373481, PMCID: PMC8352928, DOI: 10.1038/s41598-021-95121-4.Peer-Reviewed Original Research
2020
Complex nonlinear capacitance in outer hair cell macro-patches: effects of membrane tension
Santos-Sacchi J, Tan W. Complex nonlinear capacitance in outer hair cell macro-patches: effects of membrane tension. Scientific Reports 2020, 10: 6222. PMID: 32277153, PMCID: PMC7148382, DOI: 10.1038/s41598-020-63201-6.Peer-Reviewed Original ResearchMaturation of Voltage-induced Shifts in SLC26a5 (Prestin) Operating Point during Trafficking and Membrane Insertion
Zhai F, Song L, Bai JP, Dai C, Navaratnam D, Santos-Sacchi J. Maturation of Voltage-induced Shifts in SLC26a5 (Prestin) Operating Point during Trafficking and Membrane Insertion. Neuroscience 2020, 431: 128-133. PMID: 32061780, PMCID: PMC8720582, DOI: 10.1016/j.neuroscience.2020.02.003.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsAnion Transport ProteinsCell MembraneElectric CapacitanceHair Cells, Auditory, OuterMembrane PotentialsPatch-Clamp TechniquesProteinsConceptsMembrane motor proteinVoltage-dependent proteinsMembrane insertionOuter hair cellsMotor proteinsPrestin densityHEK cell linesConformational changesBiophysical forcesOHC electromotilityProteinCell linesMembrane potentialCooperative interactionsPrestinHair cellsCochlear amplificationTransmembrane voltageNonlinear capacitanceMammalsTraffickingVoltage-induced shiftElectromotilityMaturationMembrane
2019
Prestin kinetics and corresponding frequency dependence augment during early development of the outer hair cell within the mouse organ of Corti
Bai JP, Navaratnam D, Santos-Sacchi J. Prestin kinetics and corresponding frequency dependence augment during early development of the outer hair cell within the mouse organ of Corti. Scientific Reports 2019, 9: 16460. PMID: 31712635, PMCID: PMC6848539, DOI: 10.1038/s41598-019-52965-1.Peer-Reviewed Original ResearchConceptsOuter hair cellsPostnatal dayVoltage-sensor charge movementAltricial animalsPostnatal developmentCochlear placeElectrical correlatesHair cellsMouse organsCochlear amplificationEarly developmentAuditory frequencyPrestin activityAuditory capabilitiesCellsCharge movementHigh frequencyResponse increasesPrestin functionMiceActivityMonthsCourseOuter hair cell electromotility is low-pass filtered relative to the molecular conformational changes that produce nonlinear capacitance
Santos-Sacchi J, Iwasa KH, Tan W. Outer hair cell electromotility is low-pass filtered relative to the molecular conformational changes that produce nonlinear capacitance. The Journal Of General Physiology 2019, 151: 1369-1385. PMID: 31676485, PMCID: PMC6888751, DOI: 10.1085/jgp.201812280.Peer-Reviewed Original Research
2016
Synaptic Ribbons Require Ribeye for Electron Density, Proper Synaptic Localization, and Recruitment of Calcium Channels
Lv C, Stewart WJ, Akanyeti O, Frederick C, Zhu J, Santos-Sacchi J, Sheets L, Liao JC, Zenisek D. Synaptic Ribbons Require Ribeye for Electron Density, Proper Synaptic Localization, and Recruitment of Calcium Channels. Cell Reports 2016, 15: 2784-2795. PMID: 27292637, PMCID: PMC5334794, DOI: 10.1016/j.celrep.2016.05.045.Peer-Reviewed Original ResearchConceptsNeuromast hair cellsProper synaptic localizationHair cellsSynaptic ribbonsZebrafish genesProper localizationCalcium channelsSynaptic vesiclesSmall vesiclesEnhanced exocytosisFrameshift mutationRibeye proteinsSynaptic localizationVesiclesRelease sitesCellsRibeyeRibbon-like structuresNon-spiking cellsSensory systemsLocalizationGenesExocytosisSimilar numberProteinA Walkthrough of Nonlinear Capacitance Measurement of Outer Hair Cells
Song L, Santos-Sacchi J. A Walkthrough of Nonlinear Capacitance Measurement of Outer Hair Cells. Methods In Molecular Biology 2016, 1427: 501-512. PMID: 27259945, DOI: 10.1007/978-1-4939-3615-1_28.Peer-Reviewed Original ResearchChloride Anions Regulate Kinetics but Not Voltage-Sensor Q max of the Solute Carrier SLC26a5
Santos-Sacchi J, Song L. Chloride Anions Regulate Kinetics but Not Voltage-Sensor Q max of the Solute Carrier SLC26a5. Biophysical Journal 2016, 110: 2551-2561. PMID: 27276272, PMCID: PMC4906268, DOI: 10.1016/j.bpj.2016.05.002.Peer-Reviewed Original Research
2014
Chloride and Salicylate Influence Prestin-dependent Specific Membrane Capacitance SUPPORT FOR THE AREA MOTOR MODEL* * This work was supported, in whole or in part, by National Institutes of Health Grant NIDCD DC00273 (to J. S. S.).
Santos-Sacchi J, Song L. Chloride and Salicylate Influence Prestin-dependent Specific Membrane Capacitance SUPPORT FOR THE AREA MOTOR MODEL* * This work was supported, in whole or in part, by National Institutes of Health Grant NIDCD DC00273 (to J. S. S.). Journal Of Biological Chemistry 2014, 289: 10823-10830. PMID: 24554714, PMCID: PMC4036195, DOI: 10.1074/jbc.m114.549329.Peer-Reviewed Original Research
2013
IR Laser-Induced Perturbations of the Voltage-Dependent Solute Carrier Protein SLC26a5
Okunade O, Santos-Sacchi J. IR Laser-Induced Perturbations of the Voltage-Dependent Solute Carrier Protein SLC26a5. Biophysical Journal 2013, 105: 1822-1828. PMID: 24138858, PMCID: PMC3797594, DOI: 10.1016/j.bpj.2013.09.008.Peer-Reviewed Original ResearchReal Time Measures of Prestin Charge and Fluorescence during Plasma Membrane Trafficking Reveal Sub-Tetrameric Activity
Bian S, Navaratnam D, Santos-Sacchi J. Real Time Measures of Prestin Charge and Fluorescence during Plasma Membrane Trafficking Reveal Sub-Tetrameric Activity. PLOS ONE 2013, 8: e66078. PMID: 23762468, PMCID: PMC3677934, DOI: 10.1371/journal.pone.0066078.Peer-Reviewed Original ResearchConceptsObligate tetramerPlasma membraneMembrane motor proteinIntegral membrane proteinsTetracycline-inducible cell lineMembrane proteinsMotor proteinsPrestin densityTemperature blockPrestinFluorescence measuresMembrane fluorescenceCell linesNonlinear capacitanceCochlear amplificationProteinTetramerMembraneFluorescencePrevious observationsVoltage clampFluorescence methodCellsAmplificationDisparities in voltage-sensor charge and electromotility imply slow chloride-driven state transitions in the solute carrier SLC26a5
Song L, Santos-Sacchi J. Disparities in voltage-sensor charge and electromotility imply slow chloride-driven state transitions in the solute carrier SLC26a5. Proceedings Of The National Academy Of Sciences Of The United States Of America 2013, 110: 3883-3888. PMID: 23431177, PMCID: PMC3593883, DOI: 10.1073/pnas.1218341110.Peer-Reviewed Original Research
2011
Calcium-Dependent Synaptic Vesicle Trafficking Underlies Indefatigable Release at the Hair Cell Afferent Fiber Synapse
Schnee ME, Santos-Sacchi J, Castellano-Muñoz M, Kong JH, Ricci AJ. Calcium-Dependent Synaptic Vesicle Trafficking Underlies Indefatigable Release at the Hair Cell Afferent Fiber Synapse. Neuron 2011, 70: 326-338. PMID: 21521617, PMCID: PMC3254016, DOI: 10.1016/j.neuron.2011.01.031.Peer-Reviewed Original Research
2010
Effect of capsaicin on potassium conductance and electromotility of the guinea pig outer hair cell
Wu T, Song L, Shi X, Jiang Z, Santos-Sacchi J, Nuttall A. Effect of capsaicin on potassium conductance and electromotility of the guinea pig outer hair cell. Hearing Research 2010, 272: 117-124. PMID: 21044673, PMCID: PMC3387680, DOI: 10.1016/j.heares.2010.10.010.Peer-Reviewed Original ResearchConceptsOuter hair cellsTRPV-1 channelsHair cellsPrimary sensory neuronsEffects of capsaicinGuinea pig outer hair cellsSensory neuronsPharmacological actionsCapsaicinPotassium conductancePotent blockerPharmacological propertiesDirect actionNovel actionCochlear amplificationK conductanceAuditory effectsClassic activatorAuditory receptionCellsNociceptionElectromotilityBlockersNew findingsNeuronsA highly expressing Tet-inducible cell line recapitulates in situ developmental changes in prestin's Boltzmann characteristics and reveals early maturational events
Bian S, Koo BW, Kelleher S, Santos-Sacchi J, Navaratnam DS. A highly expressing Tet-inducible cell line recapitulates in situ developmental changes in prestin's Boltzmann characteristics and reveals early maturational events. American Journal Of Physiology - Cell Physiology 2010, 299: c828-c835. PMID: 20631244, PMCID: PMC3774197, DOI: 10.1152/ajpcell.00182.2010.Peer-Reviewed Original ResearchCombinatorial Cysteine Mutagenesis Reveals a Critical Intramonomer Role for Cysteines in Prestin Voltage Sensing
Bai JP, Surguchev A, Bian S, Song L, Santos-Sacchi J, Navaratnam D. Combinatorial Cysteine Mutagenesis Reveals a Critical Intramonomer Role for Cysteines in Prestin Voltage Sensing. Biophysical Journal 2010, 99: 85-94. PMID: 20655836, PMCID: PMC2895379, DOI: 10.1016/j.bpj.2010.03.066.Peer-Reviewed Original ResearchConceptsDisulfide bond formationCysteine residuesCysteine residue pairsSingle cysteine residueCysteine mutagenesisTransmembrane proteinSubstitution mutantsSLC26 familyResidue pairsFörster resonance energy transferCharge movementVoltage-dependent charge movementDisulfide interactionsResonance energy transferPrestinProteinMutantsDimer formationResiduesCysteineHair cellsSurface expressionAnion transportersCochlear amplificationWestern blotConformational State-Dependent Anion Binding in Prestin: Evidence for Allosteric Modulation
Song L, Santos-Sacchi J. Conformational State-Dependent Anion Binding in Prestin: Evidence for Allosteric Modulation. Biophysical Journal 2010, 98: 371-376. PMID: 20141749, PMCID: PMC2814207, DOI: 10.1016/j.bpj.2009.10.027.Peer-Reviewed Original ResearchAllosteric RegulationAnimalsAnionsCell MembraneCells, CulturedCentral Nervous System AgentsChloridesElectric CapacitanceGuinea PigsHair Cells, Auditory, OuterInhibitory Concentration 50Membrane PotentialsModels, NeurologicalNonlinear DynamicsPatch-Clamp TechniquesProtein ConformationProteinsSalicylatesTemperature
2009
Prestin's Anion Transport and Voltage-Sensing Capabilities Are Independent
Bai JP, Surguchev A, Montoya S, Aronson PS, Santos-Sacchi J, Navaratnam D. Prestin's Anion Transport and Voltage-Sensing Capabilities Are Independent. Biophysical Journal 2009, 96: 3179-3186. PMID: 19383462, PMCID: PMC2718310, DOI: 10.1016/j.bpj.2008.12.3948.Peer-Reviewed Original ResearchMeSH Keywords4,4'-Diisothiocyanostilbene-2,2'-Disulfonic AcidAnalysis of VarianceAnimalsAnion Transport ProteinsAntiportersCarbon RadioisotopesChloridesCHO CellsCricetinaeCricetulusElectric CapacitanceFormatesGerbillinaeIon TransportMiceMutation, MissenseOxalatesPatch-Clamp TechniquesSalicylatesSulfate TransportersConceptsClosest phylogenetic relativesTransmembrane regionSLC26 anion transporter familyMammalian outer hair cellsMembrane protein prestinPrestin's motor functionAnion transportPhylogenetic relativesAnion transporter familyTransporter familyProtein prestinChloride-binding siteGating charge movementPrestinCharge movementHair cellsOuter hair cellsResiduesMechanistic conceptsVoltage sensingTransport capabilityCellsVoltage sensorPrevious observationsUptake studies