2023
Megahertz Sampling of Prestin (SLC26a5) Voltage-Sensor Charge Movements in Outer Hair Cell Membranes Reveals Ultrasonic Activity that May Support Electromotility and Cochlear Amplification
Santos-Sacchi J, Bai J, Navaratnam D. Megahertz Sampling of Prestin (SLC26a5) Voltage-Sensor Charge Movements in Outer Hair Cell Membranes Reveals Ultrasonic Activity that May Support Electromotility and Cochlear Amplification. Journal Of Neuroscience 2023, 43: 2460-2468. PMID: 36868859, PMCID: PMC10082455, DOI: 10.1523/jneurosci.2033-22.2023.Peer-Reviewed Original ResearchConceptsConformational switchingMammalian hearingMembrane motor proteinCochlear amplificationMotor protein prestinVoltage-sensor charge movementOuter hair cell electromotilityHair cell electromotilityProtein prestinMotor proteinsConformation switchingCharge movementPrestinPrestin activityCell membraneOHC electromotilityHair cell membraneElectromotilityTransmembrane voltageOrgan of CortiAmplificationMammalsMembrane capacitanceProtein
2022
Single particle cryo-EM structure of the outer hair cell motor protein prestin
Butan C, Song Q, Bai JP, Tan WJT, Navaratnam D, Santos-Sacchi J. Single particle cryo-EM structure of the outer hair cell motor protein prestin. Nature Communications 2022, 13: 290. PMID: 35022426, PMCID: PMC8755724, DOI: 10.1038/s41467-021-27915-z.Peer-Reviewed Original ResearchConceptsTransmembrane domainProtein prestinSingle-particle cryo-EM structuresAnti-sigma factor antagonist domainOuter hair cell motor protein prestinCryo-EM structureCryo-electron microscopyMotor protein prestinSLC26 family membersSulfate transportersTransmembrane segmentsPrestin functionÅ resolutionPrestinOHC electromotilityOpen stateCochlear amplificationPutative mechanismsFamily membersDomainRepeatsSLC26A9TransportersMutationsElectromotility
2020
Maturation 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 ResearchConceptsMembrane motor proteinVoltage-dependent proteinsMembrane insertionOuter hair cellsMotor proteinsPrestin densityHEK cell linesConformational changesBiophysical forcesOHC electromotilityProteinCell linesMembrane potentialCooperative interactionsPrestinHair cellsCochlear amplificationTransmembrane voltageNonlinear capacitanceMammalsTraffickingVoltage-induced shiftElectromotilityMaturationMembrane