2023
1510-P: Lipid-Induced Renal Cortical Insulin Resistance Perturbs Gluconeogenic and Oxidative Metabolism via an sn-1,2-diacylglycerol-PKCe-Insulin Receptor Kinase Axis In Vivo
HUBBARD B, GASPAR R, ZHANG D, KAHN M, NASIRI A, SHULMAN G. 1510-P: Lipid-Induced Renal Cortical Insulin Resistance Perturbs Gluconeogenic and Oxidative Metabolism via an sn-1,2-diacylglycerol-PKCe-Insulin Receptor Kinase Axis In Vivo. Diabetes 2023, 72 DOI: 10.2337/db23-1510-p.Peer-Reviewed Original ResearchInsulin receptor kinasePyruvate carboxylaseHyperinsulinemic-euglycemic clampMitochondrial pyruvate oxidationInsulin resistanceOxidative metabolismMitochondrial pyruvate carboxylaseReceptor kinaseInhibitory phosphorylationAktS473 phosphorylationKinase axisChow fed miceImpairs insulinPyruvate oxidationKnockin micePhosphorylationKey targetFortress BiotechFed micePKCεDiacylglycerolRenal cortexHFDMetabolismBasal conditions
2022
Distinct subcellular localisation of intramyocellular lipids and reduced PKCε/PKCθ activity preserve muscle insulin sensitivity in exercise-trained mice
Gaspar R, Lyu K, Hubbard B, Leitner B, Luukkonen P, Hirabara S, Sakuma I, Nasiri A, Zhang D, Kahn M, Cline G, Pauli J, Perry R, Petersen K, Shulman G. Distinct subcellular localisation of intramyocellular lipids and reduced PKCε/PKCθ activity preserve muscle insulin sensitivity in exercise-trained mice. Diabetologia 2022, 66: 567-578. PMID: 36456864, PMCID: PMC11194860, DOI: 10.1007/s00125-022-05838-8.Peer-Reviewed Original ResearchConceptsProtein kinase CsSubcellular compartmentsDistinct subcellular localisationMuscle insulin sensitivityMultiple subcellular compartmentsInsulin receptor kinaseNovel protein kinase CsActivation of PKCεSubcellular localisationPKCθ translocationReceptor kinasePlasma membraneSubcellular distributionTriacylglycerol contentCrucial pathwaysIntramuscular triacylglycerol contentRC miceDiacylglycerolConclusions/interpretationThese resultsPKCεPM compartmentPhosphorylationMuscle triacylglycerol contentSkeletal muscleRecent findings
2020
A Membrane-Bound Diacylglycerol Species Induces PKCϵ-Mediated Hepatic Insulin Resistance
Lyu K, Zhang Y, Zhang D, Kahn M, Ter Horst KW, Rodrigues MRS, Gaspar RC, Hirabara SM, Luukkonen PK, Lee S, Bhanot S, Rinehart J, Blume N, Rasch MG, Serlie MJ, Bogan JS, Cline GW, Samuel VT, Shulman GI. A Membrane-Bound Diacylglycerol Species Induces PKCϵ-Mediated Hepatic Insulin Resistance. Cell Metabolism 2020, 32: 654-664.e5. PMID: 32882164, PMCID: PMC7544641, DOI: 10.1016/j.cmet.2020.08.001.Peer-Reviewed Original ResearchConceptsPlasma membraneEndoplasmic reticulumHigh-fat diet-induced hepatic insulin resistanceSubcellular fractionation methodInsulin receptor kinaseKey lipid speciesHepatic insulin resistanceDiet-induced hepatic insulin resistanceReceptor kinaseDiacylglycerol acyltransferase 2Molecular mechanismsAcute knockdownPhosphorylationLipid dropletsLipid speciesAcyltransferase 2KnockdownLiver-specific overexpressionDAG accumulationPKCDAG contentMembraneFractionation methodKinaseMitochondriaStructural Insights into Pseudokinase Domains of Receptor Tyrosine Kinases
Sheetz JB, Mathea S, Karvonen H, Malhotra K, Chatterjee D, Niininen W, Perttilä R, Preuss F, Suresh K, Stayrook SE, Tsutsui Y, Radhakrishnan R, Ungureanu D, Knapp S, Lemmon MA. Structural Insights into Pseudokinase Domains of Receptor Tyrosine Kinases. Molecular Cell 2020, 79: 390-405.e7. PMID: 32619402, PMCID: PMC7543951, DOI: 10.1016/j.molcel.2020.06.018.Peer-Reviewed Original ResearchMeSH KeywordsAmino Acid SequenceAnimalsBaculoviridaeBinding SitesCell Adhesion MoleculesCell LineCloning, MolecularCrystallography, X-RayGene ExpressionHumansMiceModels, MolecularPrecursor Cells, B-LymphoidProtein BindingProtein Conformation, alpha-HelicalProtein Conformation, beta-StrandProtein Interaction Domains and MotifsProtein Kinase InhibitorsReceptor Protein-Tyrosine KinasesReceptor Tyrosine Kinase-like Orphan ReceptorsReceptors, Eph FamilyRecombinant ProteinsSf9 CellsSmall Molecule LibrariesSpodopteraStructural Homology, ProteinSubstrate SpecificityConceptsInsulin receptor kinasePseudokinase domainReceptor tyrosine kinasesTyrosine kinaseNon-catalytic functionsATP-binding pocketType II inhibitorsDomain plasticityActivation loopReceptor kinaseInactive conformationStructural insightsPseudokinasesATP siteStructural comparisonAromatic residuesKinaseAlternative interactionsApparent lackImportant roleDomainWntMotifROR1Residues
2018
Membrane sn-1,2 Diacylglycerol Mediates Lipid-Induced Hepatic Insulin Resistance In Vivo
LYU K, ZHANG D, NOZAKI Y, ZHANG Y, BHANOT S, CLINE G, SAMUEL V, SHULMAN G. Membrane sn-1,2 Diacylglycerol Mediates Lipid-Induced Hepatic Insulin Resistance In Vivo. Diabetes 2018, 67 DOI: 10.2337/db18-243-lb.Peer-Reviewed Original ResearchHepatic insulin resistanceLipid-induced hepatic insulin resistanceDiglyceride acyltransferase 2Hepatic DAG contentInsulin resistanceHepatic insulin sensitivityInsulin sensitivityImpaired insulin-mediated suppressionActivation/translocationDGAT2 inhibitionAntisense oligonucleotideRegular chow dietInsulin-mediated suppressionHepatic insulin actionHepatic glucose productionInsulin receptor kinaseDAG contentChow dietASO treatmentIonis PharmaceuticalsInsulin actionGlucose productionPKCε activationSREBP-1cGilead Sciences
2008
Structural and biochemical characterization of the KRLB region in insulin receptor substrate-2
Wu J, Tseng Y, Xu C, Neubert T, White M, Hubbard S. Structural and biochemical characterization of the KRLB region in insulin receptor substrate-2. Nature Structural & Molecular Biology 2008, 15: 251-258. PMID: 18278056, DOI: 10.1038/nsmb.1388.Peer-Reviewed Original ResearchMeSH KeywordsAmino Acid SequenceAnimalsCHO CellsCricetinaeCricetulusCrystallography, X-RayHumansInsulin Receptor Substrate ProteinsIntracellular Signaling Peptides and ProteinsMiceModels, MolecularMolecular Sequence DataMutationPhosphoproteinsPhosphorylationPhosphotyrosineProtein BindingProtein Structure, TertiaryProtein-Tyrosine KinasesReceptor, IGF Type 1Structure-Activity RelationshipSubstrate SpecificityConceptsInsulin receptorPleckstrin homology domainCrucial adaptor proteinTwo-hybrid studiesInsulin receptor kinaseKinase active siteInsulin receptor substrate 2C-terminal regionTyrosine kinase domainPrevious yeastThreonine phosphorylationHomology domainAdaptor proteinReceptor kinaseKinase domainTyrosine phosphorylationBiochemical characterizationRegion functionsSubstrate 2Binding regionsPhosphorylationKinase inhibitionFactor 1IRS2Insulin-like growth factor-1
1996
Insulin Receptor Substrate-2 Binds to the Insulin Receptor through Its Phosphotyrosine-binding Domain and through a Newly Identified Domain Comprising Amino Acids 591–786 (∗)
Sawka-Verhelle D, Tartare-Deckert S, White M, Van Obberghen E. Insulin Receptor Substrate-2 Binds to the Insulin Receptor through Its Phosphotyrosine-binding Domain and through a Newly Identified Domain Comprising Amino Acids 591–786 (∗). Journal Of Biological Chemistry 1996, 271: 5980-5983. PMID: 8626379, DOI: 10.1074/jbc.271.11.5980.Peer-Reviewed Original ResearchConceptsTwo-hybrid systemIRS-2IRS-1Insulin receptorNPEY motifNPXY motifPhosphotyrosine-binding (PTB) domainPleckstrin homology domainTyrosine phosphorylation sitesActivated insulin receptorInsulin receptor kinaseIRS-2 phosphorylationReceptor tyrosine kinase activityTyrosine kinase activityAmino acids 591IRS proteinsHomology domainPhosphorylation sitesInteraction domainReceptor kinaseCytoplasmic portionBinding domainsKinase activityRegulatory loopNH2 terminus
1993
Pleiotropic Insulin Signals are Engaged by Multisite Phosphorylation of IRS-1
Sun X, Crimmins D, Myers M, Miralpeix M, White M. Pleiotropic Insulin Signals are Engaged by Multisite Phosphorylation of IRS-1. Molecular And Cellular Biology 1993, 13: 7418-7428. DOI: 10.1128/mcb.13.12.7418-7428.1993.Peer-Reviewed Original ResearchSrc homology 2IRS-1SH2 domainInsulin signalingPotential tyrosine phosphorylation sitesTyrosine residuesSrc homology 2 domainSrc homology 2 proteinAmino-terminal SH2 domainInsulin stimulationPhosphorylation of tyrosine residuesTyrosine phosphorylation sitesMultisite docking proteinInsulin signal transmissionInsulin receptor substrateInsulin receptor kinaseInsulin-stimulated phosphorylationDownstream regulatory elementsPurified insulin receptorYMXM motifsActivating insulin receptor kinaseDocking proteinMultisite phosphorylationPhosphorylation sitesRegulatory elements
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