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
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
AGS-3 Alters Caenorhabditis elegans Behavior after Food Deprivation via RIC-8 Activation of the Neural G Protein Gαo
Hofler C, Koelle MR. AGS-3 Alters Caenorhabditis elegans Behavior after Food Deprivation via RIC-8 Activation of the Neural G Protein Gαo. Journal Of Neuroscience 2011, 31: 11553-11562. PMID: 21832186, PMCID: PMC3161416, DOI: 10.1523/jneurosci.2072-11.2011.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsAnimals, Genetically ModifiedCaenorhabditis elegansCaenorhabditis elegans ProteinsCells, CulturedDrosophilaFood DeprivationGTP-Binding Protein alpha Subunits, Gi-GoGuanine Nucleotide Dissociation InhibitorsGuanine Nucleotide Exchange FactorsHumansNeuronsNuclear ProteinsProtein BindingSignal TransductionConceptsAGS-3GPR proteinsG proteinsGenetic epistasis experimentsG protein GαoRegulator domainGPR domainEpistasis experimentsBiochemical fractionationChemosensory neuronsBiological functionsBiological roleFood deprivationProteinCaenorhabditisDependent fashionFood-deprived animalsActivationVivoGαoGTPDomainAnimalsNeuronsDeprivation
2010
A Conserved Protein Interaction Interface on the Type 5 G Protein β Subunit Controls Proteolytic Stability and Activity of R7 Family Regulator of G Protein Signaling Proteins*
Porter MY, Xie K, Pozharski E, Koelle MR, Martemyanov KA. A Conserved Protein Interaction Interface on the Type 5 G Protein β Subunit Controls Proteolytic Stability and Activity of R7 Family Regulator of G Protein Signaling Proteins*. Journal Of Biological Chemistry 2010, 285: 41100-41112. PMID: 20959458, PMCID: PMC3003408, DOI: 10.1074/jbc.m110.163600.Peer-Reviewed Original ResearchConceptsR7 RGS proteinsG protein signaling (RGS) proteinsRGS proteinsDEP domainSignaling proteinsProtein interaction interfacesGenetic screenCaenorhabditis elegansRGS complexesObligate complexesProtein complexesFamily regulatorGβ5 proteinEquivalent mutationN-terminusConformational rearrangementsGβ5ProteinInteraction interfaceProteolysisMutationsRegulatorProteolytic stabilityComplexesDynamic opening
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
C. elegans G Protein Regulator RGS-3 Controls Sensitivity to Sensory Stimuli
Ferkey DM, Hyde R, Haspel G, Dionne HM, Hess HA, Suzuki H, Schafer WR, Koelle MR, Hart AC. C. elegans G Protein Regulator RGS-3 Controls Sensitivity to Sensory Stimuli. Neuron 2007, 53: 39-52. PMID: 17196529, PMCID: PMC1855255, DOI: 10.1016/j.neuron.2006.11.015.Peer-Reviewed Original ResearchConceptsSignal transductionG protein-coupled signal transductionRGS-3G protein signaling (RGS) proteinsHeterotrimeric G proteinsSpecific RGS proteinsRGS proteinsSensory neuronsSignaling proteinsMutant animalsNegative regulatorCalcium-binding proteinsG proteinsCalcium signalingBehavioral defectsTransductionSpecific odorantsProteinDefective responseRegulatorSensory behaviorsSynaptic transmissionIntense sensory stimuliExternal stimuliSignaling
2006
Heterotrimeric G Protein Signaling: Getting inside the Cell
Koelle MR. Heterotrimeric G Protein Signaling: Getting inside the Cell. Cell 2006, 126: 25-27. PMID: 16839871, DOI: 10.1016/j.cell.2006.06.026.Peer-Reviewed Original Research
2004
Genetic 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
2002
An N-terminal Region of Caenorhabditis elegans RGS Proteins EGL-10 and EAT-16 Directs Inhibition of Gαo VersusGαq Signaling*
Patikoglou GA, Koelle MR. An N-terminal Region of Caenorhabditis elegans RGS Proteins EGL-10 and EAT-16 Directs Inhibition of Gαo VersusGαq Signaling*. Journal Of Biological Chemistry 2002, 277: 47004-47013. PMID: 12354761, DOI: 10.1074/jbc.m208186200.Peer-Reviewed Original ResearchMeSH KeywordsAmino Acid SequenceAnimalsAnimals, Genetically ModifiedBlotting, WesternCaenorhabditis elegansCaenorhabditis elegans ProteinsCell MembraneChromosomesEpitopesGTP-Binding Protein RegulatorsHelminth ProteinsHeterotrimeric GTP-Binding ProteinsImmunoblottingModels, BiologicalMolecular Sequence DataMutationPlasmidsPromoter Regions, GeneticProtein BindingProtein Structure, TertiaryProteinsRGS ProteinsSequence Homology, Amino AcidSignal TransductionTime FactorsTransgenesConceptsN-terminal regionEGL-10EGL-30GOA-1EAT-16G protein signaling (RGS) proteinsN-terminalGPB-2RGS domainRGS proteinsC. elegansGbeta subunitsMembrane localizationSignaling proteinsN-terminal fragmentC-terminal fragmentGTPase activityTarget specificityBiochemical analysisProteinTarget selectivityFragment complexChimerasFragmentsDirect inhibition
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
1997
A new family of G-protein regulators — the RGS proteins
Koelle M. A new family of G-protein regulators — the RGS proteins. Current Opinion In Cell Biology 1997, 9: 143-147. PMID: 9069252, DOI: 10.1016/s0955-0674(97)80055-5.Peer-Reviewed Original ResearchConceptsRGS proteinsInactive GDP-bound formG protein alpha subunitsG proteinsDifferent RGS proteinsHeterotrimeric G proteinsG-protein regulatorsGDP-bound formG protein signalingFirst biochemical studyGenetic experimentsGTPase activityAlpha subunitBiochemical studiesProteinPhysiological significanceRegulatorFamilySubunitsSignalingNew familyLarge number
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