2022
Horvitz, H. Robert
Koelle M. Horvitz, H. Robert. 2022 DOI: 10.1016/b978-0-12-822563-9.00005-6.ChaptersModel organism Caenorhabditis elegansForward genetic analysisOrganism Caenorhabditis elegansCaenorhabditis elegansGenetic analysisCell lineagesCell deathNormal developmentBiological researchHorvitzDisease statesAmyotrophic lateral sclerosisElegansLineagesLateral sclerosisGeneticsPhysiologyNobel PrizeCells
2021
The neural G protein Gαo tagged with GFP at an internal loop is functional in Caenorhabditis elegans
Kumar S, Olson AC, Koelle MR. The neural G protein Gαo tagged with GFP at an internal loop is functional in Caenorhabditis elegans. G3: Genes, Genomes, Genetics 2021, 11: jkab167. PMID: 34003969, PMCID: PMC8496287, DOI: 10.1093/g3journal/jkab167.Peer-Reviewed Original ResearchConceptsGreen fluorescent proteinCaenorhabditis elegansGenetic analysisHeterotrimeric G proteinsG protein GαoInternal loopC. elegansProtein complexesBiochemical purificationEpitope tagPlasma membraneAlpha subunitMolecular mechanismsFluorescent proteinGenetic studiesElegansGαoG proteinsEgg layingTransgenic expressionBiochemical studiesGαo proteinsBody morphologyProteinNeurotransmitter release
2019
Serotonin and neuropeptides are both released by the HSN command neuron to initiate C. elegans egg laying
Brewer JC, Olson AC, Collins KM, Koelle MR. Serotonin and neuropeptides are both released by the HSN command neuron to initiate C. elegans egg laying. PLOS Genetics 2019, 15: e1007896. PMID: 30677018, PMCID: PMC6363226, DOI: 10.1371/journal.pgen.1007896.Peer-Reviewed Original ResearchConceptsHermaphrodite-specific neuronsEgg-laying defectsNLP-3C. elegansEgg-laying musclesEgg-laying circuitDirect postsynaptic targetsEgg-laying behaviorSerotonergic Hermaphrodite Specific NeuronsMuscle cellsSmall molecule neurotransmittersNull mutantsHSN neuronsDouble mutantSingle mutantsMutant animalsSerotonergic neuronsWild-type animalsSevere defectsMutantsElegansNeuropeptide substance PMammalian brainEggsSpecific neurons
2018
Neurotransmitter signaling through heterotrimeric G proteins: insights from studies in C. elegans.
Koelle MR. Neurotransmitter signaling through heterotrimeric G proteins: insights from studies in C. elegans. WormBook 2018, 2018: 1-52. PMID: 26937633, PMCID: PMC5010795, DOI: 10.1895/wormbook.1.75.2.Peer-Reviewed Original ResearchConceptsHeterotrimeric G proteinsC. elegansG proteinsRic-8 proteinsNew molecular componentsG protein signalingG alpha proteinsNeurotransmitter releaseGenetic screenMammalian orthologsSmall molecule neurotransmittersIndividual receptor typesProtein signalingReceptor homologG alphaElegansDistant cellsAlpha proteinAdditional GPCRsGenetic studiesIndividual neural circuitsGαMolecular componentsGαqGαo
2013
Postsynaptic ERG Potassium Channels Limit Muscle Excitability to Allow Distinct Egg-Laying Behavior States in Caenorhabditis elegans
Collins KM, Koelle MR. Postsynaptic ERG Potassium Channels Limit Muscle Excitability to Allow Distinct Egg-Laying Behavior States in Caenorhabditis elegans. Journal Of Neuroscience 2013, 33: 761-775. PMID: 23303953, PMCID: PMC3542984, DOI: 10.1523/jneurosci.3896-12.2013.Peer-Reviewed Original ResearchConceptsEgg-laying musclesBody bendsUNC-103Caenorhabditis elegansCalcium transientsTwo-state behaviorERG potassium channelsMutantsERG channelsPotassium channelsInactive phaseEggsDistinct behavioral statesMuscle excitabilityPostsynaptic excitabilityPostsynaptic sitesERG functionCaenorhabditisCalcium imagingElegansFurther adjustmentExcitabilityRhythmic excitationMuscleBehavioral states
2012
Receptors and Other Signaling Proteins Required for Serotonin Control of Locomotion in Caenorhabditis elegans
Gürel G, Gustafson MA, Pepper JS, Horvitz HR, Koelle MR. Receptors and Other Signaling Proteins Required for Serotonin Control of Locomotion in Caenorhabditis elegans. Genetics 2012, 192: 1359-1371. PMID: 23023001, PMCID: PMC3512144, DOI: 10.1534/genetics.112.142125.Peer-Reviewed Original ResearchConceptsCaenorhabditis elegansLarge-scale genetic screensSer-4Direct postsynaptic targetsGenetic screenC. elegansSignaling proteinsGenetic systemNon-overlapping setsAdditional proteinsExtrasynaptic signalsMolecular mechanismsElegansSerotonin responseGenesRelease sitesMod 1Multiple receptorsProteinSerotonin controlSerotonergic neuronsPostsynaptic targetsSerotonin functionReceptorsSerotonin receptorsThe G protein regulator AGS-3 allows C. elegans to alter behaviors in response to food deprivation
Hofler C, Koelle MR. The G protein regulator AGS-3 allows C. elegans to alter behaviors in response to food deprivation. Worm 2012, 1: 56-60. PMID: 24058824, PMCID: PMC3670173, DOI: 10.4161/worm.19042.Peer-Reviewed Original ResearchC. elegansAGS-3Genetic model organismRIC-8Model organismsMolecular mechanismsElegansG proteinsBehavioral responsesFood deprivationO familyGαoProteinNervous system functionBiochemical changesNeural responsesBrain actRecent studiesFood-seeking behaviorHuman obesityFood restrictionOrganismsSpeciesDeprivationObesity
2011
Two types of chloride transporters are required for GABAA receptor‐mediated inhibition in C. elegans
Bellemer A, Hirata T, Romero MF, Koelle MR. Two types of chloride transporters are required for GABAA receptor‐mediated inhibition in C. elegans. The EMBO Journal 2011, 30: 1852-1863. PMID: 21427702, PMCID: PMC3101993, DOI: 10.1038/emboj.2011.83.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsAnimals, Genetically ModifiedAnion Transport ProteinsBrainCaenorhabditis elegansCaenorhabditis elegans ProteinsChloridesElectrophysiologyGene Expression RegulationHydrogen-Ion ConcentrationMicroscopyMotor ActivityMutationNeuronsOocytesPlasmidsReceptors, GABA-ASymportersTransgenesXenopusConceptsCaenorhabditis elegans mutantC. elegansSynapse developmentInhibits cellBehavioral defectsCl- gradientGABAA receptor-mediated inhibitionMutantsReceptor-mediated inhibitionTransportersChloride transportersCl- channelsIdentified mutationsNeuronal expressionCl(-) cotransporterCl(-) extruderInhibitory neurotransmissionChloride gradientChloride influxElegansCellsSevere disruptionCL flowNeural activityPrincipal mechanism
2009
RSBP-1 Is a Membrane-targeting Subunit Required by the Gαq-specific But Not the Gαo-specific R7 Regulator of G protein Signaling in Caenorhabditis elegans
Porter MY, Koelle MR. RSBP-1 Is a Membrane-targeting Subunit Required by the Gαq-specific But Not the Gαo-specific R7 Regulator of G protein Signaling in Caenorhabditis elegans. Molecular Biology Of The Cell 2009, 21: 232-243. PMID: 19923320, PMCID: PMC2808233, DOI: 10.1091/mbc.e09-07-0642.Peer-Reviewed Original ResearchMeSH KeywordsAmino Acid SequenceAnimalsCaenorhabditis elegansCaenorhabditis elegans ProteinsCell MembraneGTP-Binding Protein alpha Subunits, Gi-GoGTP-Binding Protein alpha Subunits, Gq-G11GTP-Binding Protein RegulatorsImmunoprecipitationLocomotionMembrane ProteinsMolecular Sequence DataMusclesMutationNervous SystemOvulationProtein TransportRGS ProteinsSequence AlignmentSequence Homology, Amino AcidSignal TransductionSubcellular FractionsTransgenesConceptsR7 RGS proteinsRGS proteinsCaenorhabditis elegansEGL-10EAT-16G protein signaling (RGS) proteinsG proteinsMembrane-targeting sequenceGalpha GTPase activityC. elegans neuronsPhenocopies lossR7 regulatorMembrane associationRGS activityMembrane localizationProtein familyR7 familySignaling proteinsGTPase activityPlasma membraneGenetic studiesCultured cellsProteinR7BPElegansChapter 2 Insights into RGS Protein Function from Studies in Caenorhabditis elegans
Porter MY, Koelle MR. Chapter 2 Insights into RGS Protein Function from Studies in Caenorhabditis elegans. Progress In Nucleic Acid Research And Molecular Biology 2009, 86: 15-47. PMID: 20374712, DOI: 10.1016/s1877-1173(09)86002-x.Peer-Reviewed Original ResearchConceptsRGS proteinsGα proteinsMultiple RGS proteinsRGS protein functionG protein αRGS domainCaenorhabditis elegansProtein subfamiliesC. elegansGα genesProtein functionChapter 2 InsightsVivo functionNematode wormsPhysiological functionsProtein αProteinElegansSubfamiliesSuch specificityDifferent cellsRGSOrthologsCaenorhabditisMammals
2008
Regulation of Serotonin Biosynthesis by the G Proteins Gαo and Gαq Controls Serotonin Signaling in Caenorhabditis elegans
Tanis JE, Moresco JJ, Lindquist RA, Koelle MR. Regulation of Serotonin Biosynthesis by the G Proteins Gαo and Gαq Controls Serotonin Signaling in Caenorhabditis elegans. Genetics 2008, 178: 157-169. PMID: 18202365, PMCID: PMC2206068, DOI: 10.1534/genetics.107.079780.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsBiomarkersCaenorhabditis elegansCaenorhabditis elegans ProteinsGene Expression Regulation, EnzymologicGTP-Binding Protein alpha Subunits, Gi-GoGTP-Binding Protein alpha Subunits, Gq-G11Motor NeuronsMusclesOrgan SpecificityOvipositionPromoter Regions, GeneticSerotoninSignal TransductionSynapsesTryptophan HydroxylaseConceptsEgg-laying behaviorCaenorhabditis elegansG proteinsEgg-laying systemHSN motor neuronsSerotonin biosynthesisG protein GαoLevel of transcriptionEpistasis experimentsTPH-1 expressionRate-limiting enzymeGene dosageSpecific genesGalphaoGalphaqTranscriptionBiosynthesisMotor neuronsElegansTPH-1Neurotransmitter releaseGenesMultiple signalsProteinEggs
2007
Biogenic amine neurotransmitters in C. elegans.
Chase DL, Koelle MR. Biogenic amine neurotransmitters in C. elegans. WormBook 2007, 1-15. PMID: 18050501, PMCID: PMC4781333, DOI: 10.1895/wormbook.1.132.1.Peer-Reviewed Original Research
2004
Mechanism of extrasynaptic dopamine signaling in Caenorhabditis elegans
Chase DL, Pepper JS, Koelle MR. Mechanism of extrasynaptic dopamine signaling in Caenorhabditis elegans. Nature Neuroscience 2004, 7: 1096-1103. PMID: 15378064, DOI: 10.1038/nn1316.Peer-Reviewed Original ResearchMeSH KeywordsAcetylcholineAnimalsCaenorhabditis elegansCaenorhabditis elegans ProteinsDNA, ComplementaryDopamineGene TargetingGTP-Binding Protein alpha Subunits, Gi-GoGTP-Binding Protein alpha Subunits, Gq-G11GTP-Binding ProteinsMolecular Sequence DataMotor ActivityMotor NeuronsMutationNervous SystemPhylogenyReceptors, DopamineReceptors, Dopamine D1Receptors, Dopamine D2RGS ProteinsSequence Homology, Amino AcidSequence Homology, Nucleic AcidSignal TransductionConceptsCaenorhabditis elegansDOP-3DOP-1D2-like receptorsSignaling ComplexC. elegans locomotionLocomotion defectsExtrasynaptic dopamineAntagonistic effectGαoGαqElegansD2-like dopamine receptorsD1-like receptorsSame motor neuronsPathwayReceptorsDopaminergic neuronsDopamine receptorsMotor neuronsMutantsGenesDopamineSubunitsRegulatorGenetic Analysis of RGS Protein Function in Caenorhabditis elegans
Chase DL, Koelle MR. Genetic Analysis of RGS Protein Function in Caenorhabditis elegans. Methods In Enzymology 2004, 389: 305-320. PMID: 15313573, DOI: 10.1016/s0076-6879(04)89018-9.Peer-Reviewed Original ResearchConceptsRGS proteinsC. elegansG proteinsRGS protein functionStructure/function studiesG protein geneCaenorhabditis elegansGalpha mutantsClose homologProtein functionGalpha proteinsElegansGenetic analysisDetailed protocolTransgenic expressionProteinMost mammaliansMutantsFunction studiesOrthologsCaenorhabditisHomologMammalianGenesOrganisms
2001
Two RGS proteins that inhibit Gαo and Gαq signaling in C. elegans neurons require a Gβ5-like subunit for function
Chase D, Patikoglou G, Koelle M. Two RGS proteins that inhibit Gαo and Gαq signaling in C. elegans neurons require a Gβ5-like subunit for function. Current Biology 2001, 11: 222-231. PMID: 11250150, DOI: 10.1016/s0960-9822(01)00071-9.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsAnimals, Genetically ModifiedBehavior, AnimalCaenorhabditis elegansCaenorhabditis elegans ProteinsGene ExpressionGTP-Binding Protein alpha Subunits, Gi-GoGTP-Binding Protein alpha Subunits, Gq-G11GTP-Binding Protein beta SubunitsGTP-Binding Protein RegulatorsGTP-Binding ProteinsHelminth ProteinsHeterotrimeric GTP-Binding ProteinsMiceNeuronsOvipositionRGS ProteinsSignal TransductionTransgenesConceptsRGS proteinsEGL-10EAT-16C. elegansG protein signaling (RGS) proteinsG protein heterotrimersC. elegans neuronsG protein signalingGPB-2Gbeta proteinsGTPase activatorNull mutantsRGS activityDouble mutantSignaling proteinsProtein signalingG proteinsPhysiological roleMutantsProteinKnockout animalsElegansObvious defectsRGSSubunits
2000
Multiple RGS proteins alter neural G protein signaling to allow C. elegans to rapidly change behavior when fed
Dong M, Chase D, Patikoglou G, Koelle M. Multiple RGS proteins alter neural G protein signaling to allow C. elegans to rapidly change behavior when fed. Genes & Development 2000, 14: 2003-2014. PMID: 10950865, PMCID: PMC316861, DOI: 10.1101/gad.14.16.2003.Peer-Reviewed Original ResearchConceptsRGS proteinsEGL-10Egg-laying behaviorG proteinsRGS-2RGS-1Mammalian RGS proteinsMultiple RGS proteinsHeterotrimeric G proteinsG protein GTPase activityG protein signalingProtein GTPase activityGTPase activatorCaenorhabditis elegansC. elegansRGS genesDouble mutantProtein signalingGTPase activityProteinElegansBiological purposesRegulatorAppropriate behavioral responsesEggs
1999
Antagonism between Goα and Gqα in Caenorhabditis elegans: the RGS protein EAT-16 is necessary for Goα signaling and regulates Gqα activity
Hajdu-Cronin Y, Chen W, Patikoglou G, Koelle M, Sternberg P. Antagonism between Goα and Gqα in Caenorhabditis elegans: the RGS protein EAT-16 is necessary for Goα signaling and regulates Gqα activity. Genes & Development 1999, 13: 1780-1793. PMID: 10421631, PMCID: PMC316886, DOI: 10.1101/gad.13.14.1780.Peer-Reviewed Original ResearchMeSH KeywordsAmino Acid SequenceAnimalsBase SequenceCaenorhabditis elegansCaenorhabditis elegans ProteinsCOS CellsDNA PrimersGene Expression RegulationGenes, SuppressorGTP-Binding Protein RegulatorsGTP-Binding ProteinsHelminth ProteinsMolecular Sequence DataMutationSequence Homology, Amino AcidSignal TransductionConceptsEGL-30Cellular rolesEAT-16Double mutant analysisMajor cellular roleHeterotrimeric G proteinsG protein signalingMolecular genetic approachesCOS-7 cellsGOA-1Function mutantsCaenorhabditis elegansC. elegansDouble mutantProtein signalingGenetic approachesG proteinsSAG-1ElegansMutantsGenesGoαHyperactive phenotypeProteinMutations
1996
EGL-10 Regulates G Protein Signaling in the C. elegans Nervous System and Shares a Conserved Domain with Many Mammalian Proteins
Koelle M, Horvitz H. EGL-10 Regulates G Protein Signaling in the C. elegans Nervous System and Shares a Conserved Domain with Many Mammalian Proteins. Cell 1996, 84: 115-125. PMID: 8548815, DOI: 10.1016/s0092-8674(00)80998-8.Peer-Reviewed Original ResearchMeSH KeywordsAllelesAmino Acid SequenceAnimalsBase SequenceCaenorhabditis elegansCaenorhabditis elegans ProteinsConserved SequenceFungal ProteinsGene DosageGenes, HelminthGTP-Binding ProteinsMammalsMolecular Sequence DataMusclesMutationNervous SystemNervous System Physiological PhenomenaOvumProteinsRatsRGS ProteinsSerotoninSignal TransductionYeastsConceptsEGL-10G proteinsNematode C. elegansG protein signalingMammalian genesGOA-1Mammalian proteinsC. elegansConserved domainProtein signalingNegative regulatorNeurotransmitter signalingProteinSignalingDose-dependent mannerPathwaySst2pElegansYeastGenesNervous systemDose-dependent fashionRegulatorCertain periodic behaviorsActivity