2022
Autoinhibition of the GEF activity of cytoskeletal regulatory protein Trio is disrupted in neurodevelopmental disorder-related genetic variants
Bircher JE, Corcoran EE, Lam TT, Trnka MJ, Koleske AJ. Autoinhibition of the GEF activity of cytoskeletal regulatory protein Trio is disrupted in neurodevelopmental disorder-related genetic variants. Journal Of Biological Chemistry 2022, 298: 102361. PMID: 35963430, PMCID: PMC9467883, DOI: 10.1016/j.jbc.2022.102361.Peer-Reviewed Original ResearchConceptsSpectrin repeatsGEF1 domainPleckstrin homology regionExchange factor domainKey regulatory mechanismCytoskeletal regulatory proteinsSmall GTPase Rac1Autoinhibitory constraintsAccessory domainsNeurodevelopmental disordersGEF activityMultiple neurodevelopmental disordersKinase domainHomology regionProtein TrioGTPase Rac1Regulatory proteinsRegulatory mechanismsFactor domainSRS-6Genetic variantsGef1Disease variantsEnzymatic activityBio-Layer Interferometry
2008
Enhancement of ABL Kinase Catalytic Efficiency by a Direct Binding Regulator Is Independent of Other Regulatory Mechanisms*
Cao X, Tanis KQ, Koleske AJ, Colicelli J. Enhancement of ABL Kinase Catalytic Efficiency by a Direct Binding Regulator Is Independent of Other Regulatory Mechanisms*. Journal Of Biological Chemistry 2008, 283: 31401-31407. PMID: 18796434, PMCID: PMC2581583, DOI: 10.1074/jbc.m804002200.Peer-Reviewed Original ResearchConceptsSH2 domainKinase activityTyrosine kinaseAbl family tyrosine kinasesKinase activation mechanismRelief of autoinhibitionUnique protein structureFamily tyrosine kinasesCatalytic site mutationsPhosphorylation of CrkInhibitor-resistant mutantsAbl kinase activityTyrosine kinase activitySH3-SH2ABL tyrosine kinase activityABL2 kinaseABL substratesRegulatory domainPhosphorylation mechanismDownstream effectorsDomain coreInactive conformationAbl SH3Regulatory mechanismsProtein structure
2003
Phospholipids Can Switch the GTPase Substrate Preference of a GTPase-activating Protein*
Ligeti E, Dagher MC, Hernandez SE, Koleske AJ, Settleman J. Phospholipids Can Switch the GTPase Substrate Preference of a GTPase-activating Protein*. Journal Of Biological Chemistry 2003, 279: 5055-5058. PMID: 14699145, DOI: 10.1074/jbc.c300547200.Peer-Reviewed Original ResearchConceptsGTPase-activating proteinsSmall GTPasesSubstrate preferencePotent GTPase-activating proteinMajor cellular inhibitorActivity of GTPasesNovel regulatory mechanismLikely physiological roleRacGAP activityIntrinsic GTPRhoGAP activityP190 RhoGAPCellular inhibitorRac GTPasesGTPasesRegulatory mechanismsPhysiological roleProteinPhospholipidsFatty acidsRhoGAPGTPP190ActivityRho