2008
Mechanism for alternating access in neurotransmitter transporters
Forrest LR, Zhang YW, Jacobs MT, Gesmonde J, Xie L, Honig BH, Rudnick G. Mechanism for alternating access in neurotransmitter transporters. Proceedings Of The National Academy Of Sciences Of The United States Of America 2008, 105: 10338-10343. PMID: 18647834, PMCID: PMC2480614, DOI: 10.1073/pnas.0804659105.Peer-Reviewed Original ResearchConceptsNeurotransmitter transportersMammalian neurotransmitter transportersMammalian serotonin transporterTransmembrane helix 1Bacterial homologueIon-binding sitesTransporter familyExtensive mutagenesisHelix 1Similar repeatsLeuTConformational changesSerotonin transporterRepeatsAlternate conformationConformational differencesExtracellular pathwaysCytoplasmTransportersExtracellular spaceCysteine reagentCrystal structureConformationPathwayAccessibility measurementsInvolvement of serotonin transporter extracellular loop 1 in serotonin binding and transport
Mao Y, Mao Y, Mathewson L, Mao Y, Mathewson L, Gesmonde J, Sato Y, Mao Y, Mathewson L, Gesmonde J, Sato Y, Holy M, Sitte H, Rudnick G. Involvement of serotonin transporter extracellular loop 1 in serotonin binding and transport. Molecular Membrane Biology 2008, 25: 115-127. PMID: 18307099, PMCID: PMC4510095, DOI: 10.1080/09687680701633257.Peer-Reviewed Original ResearchMeSH KeywordsAmino Acid SequenceAnimalsBiological TransportCell MembraneHeLa CellsHumansIndicators and ReagentsKineticsLigandsMesylatesMolecular Sequence DataMutant ProteinsProtein Structure, TertiaryRatsSequence DeletionSerotoninSerotonin Plasma Membrane Transport ProteinsStructure-Activity Relationship
2001
A Conformationally Sensitive Residue on the Cytoplasmic Surface of Serotonin Transporter*
Androutsellis-Theotokis A, Ghassemi F, Rudnick G. A Conformationally Sensitive Residue on the Cytoplasmic Surface of Serotonin Transporter*. Journal Of Biological Chemistry 2001, 276: 45933-45938. PMID: 11592963, DOI: 10.1074/jbc.m107462200.Peer-Reviewed Original Research
1999
Molecular cloning, expression and characterization of a bovine serotonin transporter1The sequence reported in this paper has been deposited in the GenBank data base (accession number AF119122).1
Mortensen O, Kristensen A, Rudnick G, Wiborg O. Molecular cloning, expression and characterization of a bovine serotonin transporter1The sequence reported in this paper has been deposited in the GenBank data base (accession number AF119122).1. Brain Research 1999, 71: 120-126. PMID: 10407194, DOI: 10.1016/s0169-328x(99)00178-3.Peer-Reviewed Original ResearchMeSH KeywordsAmino Acid SequenceAnimalsCarrier ProteinsCattleCitalopramCloning, MolecularDesipramineFemaleFluoxetineHeLa CellsHumansImipramineKineticsMembrane GlycoproteinsMembrane Transport ProteinsMolecular Sequence DataNerve Tissue ProteinsN-Methyl-3,4-methylenedioxyamphetamineOrgan SpecificityParoxetinePhylogenyPregnancyRatsRecombinant ProteinsReverse Transcriptase Polymerase Chain ReactionSequence AlignmentSequence Homology, Amino AcidSerotoninSerotonin Plasma Membrane Transport ProteinsTransfectionConceptsSerotonin transporterHuman serotonin transporterExpression of SERTAdrenal glandBrain stemParathyroid glandsPharmacological profileBone marrowThyroid glandSmall intestinePharmacological targetsRT-PCR amplificationDecreased sensitivityExtracellular fluidGlandAmino acid differencesBiogenic aminesNeurotransmitter transportersDependent neurotransmitter transportersImportant antidepressantsAcid differencesDifferent tissuesAntidepressantsParoxetineDesipramine
1998
Critical Amino Acid Residues in Transmembrane Span 7 of the Serotonin Transporter Identified by Random Mutagenesis*
Penado K, Rudnick G, Stephan M. Critical Amino Acid Residues in Transmembrane Span 7 of the Serotonin Transporter Identified by Random Mutagenesis*. Journal Of Biological Chemistry 1998, 273: 28098-28106. PMID: 9774428, DOI: 10.1074/jbc.273.43.28098.Peer-Reviewed Original ResearchMeSH KeywordsAmino Acid SequenceAnimalsBiological TransportCarrier ProteinsMembrane GlycoproteinsMembrane Transport ProteinsModels, MolecularMolecular Sequence DataMutagenesisNerve Tissue ProteinsProtein ConformationRatsSerotoninSerotonin Plasma Membrane Transport ProteinsStructure-Activity RelationshipConceptsAmino acid residuesRandom mutagenesisAcid residuesTransport activityCritical amino acid residuesRat brain serotonin transporterCritical residuesTransport cycleWild typeNonconservative mutationsStructural predictionsTransporter functionLater stepsMutationsSerotonin transporterResiduesMutagenesisHydrophobic substitutionsTyr-385TransportersMutantsActivitySubstitutionNearby positions
1997
External Cysteine Residues in the Serotonin Transporter †
Chen J, Liu-Chen S, Rudnick G. External Cysteine Residues in the Serotonin Transporter †. Biochemistry 1997, 36: 1479-1486. PMID: 9063896, DOI: 10.1021/bi962256g.Peer-Reviewed Original ResearchConceptsTransport activityMTS reagentsCysteine residuesWild typeWild-type transporterSecond external loopTransient expression systemSurface expressionRat serotonin transporterExternal cysteine residuesHydropathy analysisMutant transportersType transporterDouble mutantExpression systemMethanethiosulfonate reagentsLigand bindingSerotonin transporterMutantsExtracellular loopHeLa cellsDisulfide bondsPartial activityTransportersSerine
1996
Cell-specific Sorting of Biogenic Amine Transporters Expressed in Epithelial Cells*
Gu H, Ahn J, Caplan M, Blakely R, Levey A, Rudnick G. Cell-specific Sorting of Biogenic Amine Transporters Expressed in Epithelial Cells*. Journal Of Biological Chemistry 1996, 271: 18100-18106. PMID: 8663573, DOI: 10.1074/jbc.271.30.18100.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsBiogenic AminesBiological TransportCarrier ProteinsCell CompartmentationCell MembraneCell PolarityCells, CulturedDogsDopamineDopamine Plasma Membrane Transport ProteinsEpithelial CellsHumansImmunohistochemistryMembrane GlycoproteinsMembrane Transport ProteinsNerve Tissue ProteinsNorepinephrineNorepinephrine Plasma Membrane Transport ProteinsRatsRecombinant ProteinsSerotoninSerotonin Plasma Membrane Transport ProteinsSymportersConceptsMadin-Darby canine kidneyMDCK cellsLLC-PK1 cellsNeurotransmitter transportersCell surface biotinylationConfocal immunofluorescence microscopyBasolateral membraneCell-specific mechanismsEpithelial cellsBiogenic amine transportersMembrane proteinsSurface biotinylationCDNA encodingHuman DA transporterAmine transportersImmunofluorescence microscopyBiotinylating reagentTransportersPermeable filter supportsApical surfaceImmunocytochemistry resultsBasolateral mediumSurface expressionApical sideDA transporter
1994
Stable expression of biogenic amine transporters reveals differences in inhibitor sensitivity, kinetics, and ion dependence.
Gu H, Wall S, Rudnick G. Stable expression of biogenic amine transporters reveals differences in inhibitor sensitivity, kinetics, and ion dependence. Journal Of Biological Chemistry 1994, 269: 7124-7130. PMID: 8125921, DOI: 10.1016/s0021-9258(17)37256-3.Peer-Reviewed Original ResearchAnimalsBinding SitesBiogenic AminesBiological TransportCarrier ProteinsCell LineDopamine Plasma Membrane Transport ProteinsHumansKineticsMembrane GlycoproteinsMembrane Transport ProteinsNerve Tissue ProteinsNorepinephrine Plasma Membrane Transport ProteinsRatsRecombinant ProteinsSerotonin Plasma Membrane Transport ProteinsSymportersTransfection
1993
Binding of the cocaine analog 2 beta-carbomethoxy-3 beta-(4-[125I]iodophenyl)tropane to serotonin and dopamine transporters: different ionic requirements for substrate and 2 beta-carbomethoxy-3 beta-(4-[125I]iodophenyl)tropane binding.
Wall S, Innis R, Rudnick G. Binding of the cocaine analog 2 beta-carbomethoxy-3 beta-(4-[125I]iodophenyl)tropane to serotonin and dopamine transporters: different ionic requirements for substrate and 2 beta-carbomethoxy-3 beta-(4-[125I]iodophenyl)tropane binding. Molecular Pharmacology 1993, 43: 264-70. PMID: 8429827.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsBinding, CompetitiveBlood PlateletsCarrier ProteinsCocaineCorpus StriatumDopamineDopamine Plasma Membrane Transport ProteinsHydrogen-Ion ConcentrationIn Vitro TechniquesIonsMembrane GlycoproteinsMembrane Transport ProteinsNerve Tissue ProteinsOsmolar ConcentrationProtein BindingRadioligand AssayRatsSerotoninSerotonin Plasma Membrane Transport Proteins
1992
Expression of a cloned gamma-aminobutyric acid transporter in mammalian cells.
Keynan S, Suh Y, Kanner B, Rudnick G. Expression of a cloned gamma-aminobutyric acid transporter in mammalian cells. Biochemistry 1992, 31: 1974-9. PMID: 1536839, DOI: 10.1021/bi00122a011.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsBiological TransportCarrier ProteinsChloridesCloning, MolecularDNAGABA Plasma Membrane Transport ProteinsGamma-Aminobutyric AcidGene ExpressionGenetic VectorsHeLa CellsHumansKineticsL CellsMembrane ProteinsMembrane Transport ProteinsMiceNerve Tissue ProteinsOrganic Anion TransportersPlasmidsPrecipitin TestsRatsSodiumTransfectionTunicamycinXenopusConceptsMammalian cellsGABA transportMouse Ltk- cellsT7 RNA polymerasePlasma membrane vesiclesL cellsApparent molecular massGABA transporterSynaptic plasma membrane vesiclesGamma-aminobutyric acid transporterPresence of tunicamycinEukaryotic expression vectorRNA polymeraseTransient expressionExpression vectorAcid transportersMembrane vesiclesStable expressionLtk- cellsFunctional expressionGAT-1Molecular massHeLa cellsTransportersTransfection
1989
A method for replacing intravesicular contents of golgi vesicles using an air-driven ultracentrifuge
Waldman B, Rudnick G. A method for replacing intravesicular contents of golgi vesicles using an air-driven ultracentrifuge. Analytical Biochemistry 1989, 180: 216-221. PMID: 2817351, DOI: 10.1016/0003-2697(89)90419-3.Peer-Reviewed Original Research
1985
Relative lack of ATP-driven H+ translocase activity in isolated parotid secretory granules.
Arvan P, Rudnick G, Castle J. Relative lack of ATP-driven H+ translocase activity in isolated parotid secretory granules. Journal Of Biological Chemistry 1985, 260: 14945-14952. PMID: 2866180, DOI: 10.1016/s0021-9258(18)95684-x.Peer-Reviewed Original ResearchAcetatesAcetic AcidAdenosine TriphosphateAnimalsCarbonyl Cyanide m-Chlorophenyl HydrazoneCarbonyl Cyanide p-TrifluoromethoxyphenylhydrazoneCell Membrane PermeabilityCytoplasmic GranulesEthylmaleimideHydrogen-Ion ConcentrationHydrolysisMembrane PotentialsMethylaminesParotid GlandProton-Translocating ATPasesRatsSodium Cyanide
1984
Osmotic properties and internal pH of isolated rat parotid secretory granules.
Arvan P, Rudnick G, Castle J. Osmotic properties and internal pH of isolated rat parotid secretory granules. Journal Of Biological Chemistry 1984, 259: 13567-13572. PMID: 6490664, DOI: 10.1016/s0021-9258(18)90730-1.Peer-Reviewed Original ResearchSpiperone: evidence for uptake into secretory granules.
Dannies P, Rudnick M, Fishkes H, Rudnick G. Spiperone: evidence for uptake into secretory granules. Proceedings Of The National Academy Of Sciences Of The United States Of America 1984, 81: 1867-1870. PMID: 6584920, PMCID: PMC345023, DOI: 10.1073/pnas.81.6.1867.Peer-Reviewed Original ResearchConceptsSerotonin receptorsSecretory granulesRat pituitary tumor cellsMicroM reserpinePlatelet dense granulesPituitary tumor cellsDopamine antagonistsIntracellular storage organellesSpiperoneTumor cellsSerotonin transportDense granulesBiogenic amine transportReceptorsCell strainsDopamineEquimolar concentrationsSpecific ligandsAmine transportStorage organellesPlasma membrane transport systemsReserpineAntagonistMinNeurons