2017
Isolated polycystic liver disease genes define effectors of polycystin-1 function
Besse W, Dong K, Choi J, Punia S, Fedeles SV, Choi M, Gallagher AR, Huang EB, Gulati A, Knight J, Mane S, Tahvanainen E, Tahvanainen P, Sanna-Cherchi S, Lifton RP, Watnick T, Pei YP, Torres VE, Somlo S. Isolated polycystic liver disease genes define effectors of polycystin-1 function. Journal Of Clinical Investigation 2017, 127: 1772-1785. PMID: 28375157, PMCID: PMC5409105, DOI: 10.1172/jci90129.Peer-Reviewed Original ResearchMeSH KeywordsAdultAnimalsCalcium-Binding ProteinsCell Line, TransformedCystsEndoplasmic ReticulumFemaleGenome-Wide Association StudyGlucosidasesGlucosyltransferasesHeterozygoteHumansIntracellular Signaling Peptides and ProteinsLiver DiseasesMaleMembrane ProteinsMiceMolecular ChaperonesMutationRNA-Binding ProteinsSEC Translocation ChannelsTRPP Cation ChannelsConceptsPolycystin-1 functionPolycystin-1Protein biogenesis pathwaysGenome-wide basisPolycystic liver diseaseLoss-of-function mutationsWhole-exome sequencingHeterozygous loss-of-function mutationsBiogenesis pathwayLoss of functionAdditional genesDisease genesGene productsCell line modelsCandidate genesExome sequencingEndoplasmic reticulumCausative genesFunction mutationsGenesAutosomal dominant polycystic kidney diseaseDominant polycystic kidney diseaseSec63Defective maturationKidney cysts
2015
Hepatocystin is Essential for TRPM7 Function During Early Embryogenesis
Overton JD, Komiya Y, Mezzacappa C, Nama K, Cai N, Lou L, Fedeles SV, Habas R, Runnels LW. Hepatocystin is Essential for TRPM7 Function During Early Embryogenesis. Scientific Reports 2015, 5: 18395. PMID: 26671672, PMCID: PMC4680877, DOI: 10.1038/srep18395.Peer-Reviewed Original ResearchConceptsXenopus laevis embryosEmbryonic lethalityTRPM7 functionLaevis embryosProtein kinase C substrate 80KEarly embryonic lethalityNoncatalytic beta subunitXenopus laevis embryogenesisEmbryonic day E11.5TRPM7 ion channelVertebrate gastrulationGastrulation defectsResident enzymesEarly embryogenesisPolycystin-2TRPM7 protein expressionDay E11.5KDa proteinGlucosidase IIEndoplasmic reticulumBeta subunitOverexpression of TRPM7Second alleleSomatic lossIon channelsSec63 and Xbp1 regulate IRE1α activity and polycystic disease severity
Fedeles SV, So JS, Shrikhande A, Lee SH, Gallagher AR, Barkauskas CE, Somlo S, Lee AH. Sec63 and Xbp1 regulate IRE1α activity and polycystic disease severity. Journal Of Clinical Investigation 2015, 125: 1955-1967. PMID: 25844898, PMCID: PMC4463201, DOI: 10.1172/jci78863.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsCell LineDisease Models, AnimalDNA HelicasesDNA-Binding ProteinsEndoribonucleasesFemaleGlucosidasesIntracellular Signaling Peptides and ProteinsKidneyMaleMiceMice, Inbred C57BLMice, KnockoutMice, TransgenicMolecular ChaperonesPolycystic Kidney, Autosomal DominantPolycystic Kidney, Autosomal RecessiveProtein Serine-Threonine KinasesProtein Structure, TertiaryReceptors, G-Protein-CoupledRecombinant Fusion ProteinsRegulatory Factor X Transcription FactorsRNA SplicingRNA, Small InterferingRNA-Binding ProteinsTranscription FactorsTransfectionTRPP Cation ChannelsUnfolded Protein ResponseX-Box Binding Protein 1ConceptsG protein-coupled receptor proteolysis siteCyst formationPolycystic liver diseaseGPS cleavagePolycystin-1IRE1α-XBP1 branchMurine genetic modelsPolycystic kidney phenotypeLiver diseasePolycystic diseaseCystic diseaseDisease manifestationsMurine modelDisease severityKidney phenotypeXBP1 activationUnfolded protein response pathwayDiseaseXBP1 overexpressionPC1 functionsProtein response pathwayEnforced expressionMiceXBP1Activation of XBP1
2014
N-Glycosylation Determines the Abundance of the Transient Receptor Potential Channel TRPP2*
Hofherr A, Wagner C, Fedeles S, Somlo S, Köttgen M. N-Glycosylation Determines the Abundance of the Transient Receptor Potential Channel TRPP2*. Journal Of Biological Chemistry 2014, 289: 14854-14867. PMID: 24719335, PMCID: PMC4031537, DOI: 10.1074/jbc.m114.562264.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsAsparagineBinding SitesBlotting, WesternCell LineCells, CulturedGlucosidasesGlycosylationHEK293 CellsHeLa CellsHumansIntracellular Signaling Peptides and ProteinsLysosomesMass SpectrometryMiceMice, KnockoutMicroscopy, FluorescenceMutationPolycystic Kidney, Autosomal DominantProtein Serine-Threonine KinasesProteolysisPyruvate Dehydrogenase Acetyl-Transferring KinaseConceptsGlucosidase IINon-catalytic β-subunitsProtein expressionFirst extracellular loopAutosomal dominant polycystic liver diseaseEfficient biogenesisGenetic interactionsMembrane proteinsBiochemical approachesN-glycosylationGenetic approachesTRPP2Glycosylation sitesBiological roleLysosomal degradationΒ-subunitChemical inhibitionBiogenesisExtracellular loopNonselective cation channelsIon channelsBiological importanceGlycosylationCation channelsProtein levels
2011
A genetic interaction network of five genes for human polycystic kidney and liver diseases defines polycystin-1 as the central determinant of cyst formation
Fedeles SV, Tian X, Gallagher AR, Mitobe M, Nishio S, Lee SH, Cai Y, Geng L, Crews CM, Somlo S. A genetic interaction network of five genes for human polycystic kidney and liver diseases defines polycystin-1 as the central determinant of cyst formation. Nature Genetics 2011, 43: 639-647. PMID: 21685914, PMCID: PMC3547075, DOI: 10.1038/ng.860.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsApoptosisBlotting, WesternCell ProliferationCystsFemaleGlucosidasesImmunoenzyme TechniquesImmunoprecipitationIntracellular Signaling Peptides and ProteinsLiver DiseasesMaleMiceMice, Inbred C57BLMice, TransgenicMutationPolycystic Kidney DiseasesReceptors, Cell SurfaceTRPP Cation Channels