2018
Structural elements required for coupling ion and substrate transport in the neurotransmitter transporter homolog LeuT
Zhang YW, Tavoulari S, Sinning S, Aleksandrova AA, Forrest LR, Rudnick G. Structural elements required for coupling ion and substrate transport in the neurotransmitter transporter homolog LeuT. Proceedings Of The National Academy Of Sciences Of The United States Of America 2018, 115: e8854-e8862. PMID: 30181291, PMCID: PMC6156673, DOI: 10.1073/pnas.1716870115.Peer-Reviewed Original ResearchConceptsTransporter domainConformational changesOpen stateSodium symporter familyIon-substrate couplingTransmembrane ion gradientsSymporter familyNSS transportersSubstrate bindingLeuTIntracellular substratesCysteine accessibilitySubstrate transportAccessibility of substrateTyrosine residuesConformational responseNa2 siteUncoupled movementIon gradientsExtracellular pathwaysMechanistic componentsTransportersProteinTransport of ionsBinding
1998
[16] Ion-coupled neurotransmitter transport: Thermodynamic vs. kinetic determinations of stoichiometry
Rudnick G. [16] Ion-coupled neurotransmitter transport: Thermodynamic vs. kinetic determinations of stoichiometry. Methods In Enzymology 1998, 296: 233-247. PMID: 9779452, DOI: 10.1016/s0076-6879(98)96018-9.Peer-Reviewed Reviews, Practice Guidelines, Standards, and Consensus StatementsConceptsNumber of ionsKinetic determinationMolecular machinesCharge movesIonsLipid bilayersNeurotransmitter moleculesMoleculesInput of energySteady-state distributionLow concentrationsChargeElectrical potentialMembraneIon gradientsStoichiometryHigh concentrationsUltimate concentrationNaConcentrationEnergyBilayersNeurotransmitter transportersNumber of NaNeurotransmitter transport
1996
Ion Coupling Stoichiometry for the Norepinephrine Transporter in Membrane Vesicles from Stably Transfected Cells (∗)
Gu H, Wall S, Rudnick G. Ion Coupling Stoichiometry for the Norepinephrine Transporter in Membrane Vesicles from Stably Transfected Cells (∗). Journal Of Biological Chemistry 1996, 271: 6911-6916. PMID: 8636118, DOI: 10.1074/jbc.271.12.6911.Peer-Reviewed Original ResearchConceptsMembrane vesiclesTransmembrane ion gradientsLLC-PK1 cellsMajor substrateTransport substratesTransfected CellsStably Transfected CellsIon gradientsCoupling stoichiometryNet positive chargeDA accumulationVesiclesSubstrate moleculesTransportersNorepinephrine transporterAccumulationCellsGamma-aminobutyric acidCotransportDAGradientStoichiometrySubstrateAbsenceTransport processes
1993
From synapse to vesicle: The reuptake and storage of biogenic amine neurotransmitters
Rudnick G, Clark J. From synapse to vesicle: The reuptake and storage of biogenic amine neurotransmitters. Biochimica Et Biophysica Acta 1993, 1144: 249-263. PMID: 8104483, DOI: 10.1016/0005-2728(93)90109-s.Peer-Reviewed Reviews, Practice Guidelines, Standards, and Consensus StatementsConceptsPresynaptic plasma membraneBiogenic amine neurotransmittersEndogenous regulatory mechanismsSynaptic transmitter levelsPlasma membraneIndividual proteinsRegulatory mechanismsTransport systemMolecular levelSynaptic vesiclesAmine neurotransmittersIon gradientsTransportersVesiclesCDNARapid progressProteinNeurotransmittersRegulationMechanismMembraneSynapseTransmitter levels
1982
Coupling of transmembrane proton gradients to platelet serotonin transport.
Keyes S, Rudnick G. Coupling of transmembrane proton gradients to platelet serotonin transport. Journal Of Biological Chemistry 1982, 257: 1172-1176. PMID: 7056713, DOI: 10.1016/s0021-9258(19)68170-6.Peer-Reviewed Original ResearchConceptsPlasma membrane vesiclesSerotonin transportTransmembrane proton gradientPlatelet plasma membraneTransmembrane ion gradientsApparent competitionPlasma membraneMembrane vesiclesProton gradientIon gradientsSerotonin accumulationSole driving forceVesiclesAccumulationSerotonin transporterPH differencePhysiological pHTransportersTransportPH stimulationMembraneGradient