2023
Allosteric inhibition of the T cell receptor by a designed membrane ligand
Ye Y, Morita S, Chang J, Buckley P, Wilhelm K, DiMaio D, Groves J, Barrera F. Allosteric inhibition of the T cell receptor by a designed membrane ligand. ELife 2023, 12: e82861. PMID: 37796108, PMCID: PMC10554751, DOI: 10.7554/elife.82861.Peer-Reviewed Original ResearchConceptsT cell receptorTCR activationCD3ζ subunitsTM ligandsComplex molecular machinesReceptor tyrosine kinase EphA2Cell receptorTM domainTransmembrane domainNative nanodiscsTCR subunitsAllosteric changesTM bundleCytoplasmic sideTM regionMolecular mechanismsExtracellular domainAllosteric inhibitionLck phosphorylationMolecular machinesMembrane receptorsAberrant activationSubunitsMembrane ligandsDecades of investigation
2017
Two transmembrane dimers of the bovine papillomavirus E5 oncoprotein clamp the PDGF β receptor in an active dimeric conformation
Karabadzhak AG, Petti LM, Barrera FN, Edwards APB, Moya-Rodríguez A, Polikanov YS, Freites JA, Tobias DJ, Engelman DM, DiMaio D. Two transmembrane dimers of the bovine papillomavirus E5 oncoprotein clamp the PDGF β receptor in an active dimeric conformation. Proceedings Of The National Academy Of Sciences Of The United States Of America 2017, 114: e7262-e7271. PMID: 28808001, PMCID: PMC5584431, DOI: 10.1073/pnas.1705622114.Peer-Reviewed Original ResearchConceptsTransmembrane domainE5 proteinE5 dimerPlatelet-derived growth factor β receptorGrowth factor β receptorActive dimeric conformationPDGF β-receptorTransmembrane dimerProtein bindsMembrane environmentReceptor dimerizationDimeric conformationAtom molecular dynamics simulationsBiochemical experimentsMouse cellsMolecular mechanismsActive dimerΒ receptorBovine papillomavirusProteinSpecific interactionsMembrane modelingReceptor activationDimerizationComplexes
2015
Biologically active LIL proteins built with minimal chemical diversity
Heim EN, Marston JL, Federman RS, Edwards AP, Karabadzhak AG, Petti LM, Engelman DM, DiMaio D. Biologically active LIL proteins built with minimal chemical diversity. Proceedings Of The National Academy Of Sciences Of The United States Of America 2015, 112: e4717-e4725. PMID: 26261320, PMCID: PMC4553812, DOI: 10.1073/pnas.1514230112.Peer-Reviewed Original ResearchConceptsAmino acidsTransmembrane proteinSpecific biological activityPlatelet-derived growth factor β receptorArtificial transmembrane proteinsChemical diversityGrowth factor β receptorHydrophobic amino acidsLIL proteinsKnown proteinsIndividual amino acidsTransmembrane domainCellular contextDifferent amino acidsComplete mutagenesisMost proteinsBiological activityActive proteinSimple proteinSingle isoleucineSpecific sequencesProteinDiversityLeucineΒ receptor
2014
Small transmembrane protein inhibitors of the platelet‐derived growth factor β receptor (LB215)
Petti L, Talbert‐Slagle K, Chacon K, Hochstrasser M, DiMaio D. Small transmembrane protein inhibitors of the platelet‐derived growth factor β receptor (LB215). The FASEB Journal 2014, 28 DOI: 10.1096/fasebj.28.1_supplement.lb215.Peer-Reviewed Original ResearchTransmembrane domainTransmembrane proteinPlatelet-derived growth factor β receptorProtein inhibitorGrowth factor receptor signalingSingle conservative amino acid substitutionSmall transmembrane proteinConservative amino acid substitutionsGrowth factor β receptorParticular tyrosine residueReceptor tyrosine kinasesAmino acid substitutionsSequence similarityGrowth factor receptorTraptamersReceptor dimerizationEffects of PDGFSmall proteinsTyrosine residuesExtracellular domainTyrosine kinaseAcid substitutionsReceptor signalingRetroviral libraryPDGFβR
1998
Role of Glutamine 17 of the Bovine Papillomavirus E5 Protein in Platelet-Derived Growth Factor β Receptor Activation and Cell Transformation
Klein O, Polack G, Surti T, Kegler-Ebo D, Smith S, DiMaio D. Role of Glutamine 17 of the Bovine Papillomavirus E5 Protein in Platelet-Derived Growth Factor β Receptor Activation and Cell Transformation. Journal Of Virology 1998, 72: 8921-8932. PMID: 9765437, PMCID: PMC110309, DOI: 10.1128/jvi.72.11.8921-8932.1998.Peer-Reviewed Original ResearchConceptsBovine papillomavirus E5 proteinPDGF beta receptorE5 proteinTransform cellsCellular platelet-derived growth factor (PDGF) beta receptorAmino acidsBa/F3 hematopoietic cellsPosition 17Cell transformationPlatelet-derived growth factor beta receptorHomodimeric transmembrane proteinReceptor tyrosine phosphorylationGrowth factor beta receptorReceptor tyrosine kinasesPDGF receptor tyrosine kinaseReceptor activationPossible amino acidsBeta receptorsStable complexesComplex formationMutant proteinsTransmembrane domainTransmembrane proteinGrowth factor-beta (TGF-beta) receptor activationTyrosine phosphorylationOncogenic activation of the PDGF β receptor by the transmembrane domain of p185neu*
Petti L, Irusta P, DiMaio D. Oncogenic activation of the PDGF β receptor by the transmembrane domain of p185neu*. Oncogene 1998, 16: 843-851. PMID: 9484775, DOI: 10.1038/sj.onc.1201590.Peer-Reviewed Original ResearchConceptsBa/F3 cellsTransmembrane domainBa/F3 hematopoietic cellsF3 cellsWild-type PDGF receptorNovel tyrosine phosphorylated proteinsIL-3-independent growthTyrosine phosphorylated proteinsDistinct signaling pathwaysWild-type PDGFLevels of phosphotyrosineWild-type receptorIL-3Β receptorPDGF β-receptorPhosphorylated proteinsTyrosine autophosphorylationOncogenic formsKinase activityMouse C127Receptor homodimerizationOncogenic activationSignaling pathwaysChimeric receptorsFoci formation
1997
Identification of amino acids in the transmembrane and juxtamembrane domains of the platelet-derived growth factor receptor required for productive interaction with the bovine papillomavirus E5 protein
Petti L, Reddy V, Smith S, DiMaio D. Identification of amino acids in the transmembrane and juxtamembrane domains of the platelet-derived growth factor receptor required for productive interaction with the bovine papillomavirus E5 protein. Journal Of Virology 1997, 71: 7318-7327. PMID: 9311809, PMCID: PMC192076, DOI: 10.1128/jvi.71.10.7318-7327.1997.Peer-Reviewed Original ResearchMeSH KeywordsAmino Acid SequenceAnimalsBovine papillomavirus 1CattleCell LineCell MembraneErbB ReceptorsHumansInterleukin-3KineticsLeucineLysineMiceMolecular Sequence DataMutagenesis, Site-DirectedOncogene Proteins v-sisOncogene Proteins, ViralPoint MutationPolymerase Chain ReactionProtein Structure, SecondaryRatsReceptor, ErbB-2Receptor, Platelet-Derived Growth Factor betaReceptors, Platelet-Derived Growth FactorReceptors, VirusRecombinant Fusion ProteinsRetroviridae Proteins, OncogenicSequence AlignmentThreonineTransfectionConceptsBovine papillomavirus E5 proteinE5 proteinTransmembrane domainPDGF beta receptorAmino acidsCellular platelet-derived growth factor (PDGF) beta receptorReceptor mutantsJuxtamembrane domainPlatelet-derived growth factor beta receptorPutative transmembrane domainsMurine Ba/F3 cellsCarboxyl-terminal domainBa/F3 cellsV-sisReceptor tyrosine phosphorylationExtracellular juxtamembrane domainGrowth factor beta receptorSpecific amino acidsProductive interactionReceptor activationPlatelet-derived growth factor receptorAcidic amino acidsComplex formationThreonine residuesBeta receptors