1999
Crystallographic Studies of Phosphonate-Based α-Reaction Transition-State Analogues Complexed to Tryptophan Synthase † , ‡
Sachpatzidis A, Dealwis C, Lubetsky J, Liang P, Anderson K, Lolis E. Crystallographic Studies of Phosphonate-Based α-Reaction Transition-State Analogues Complexed to Tryptophan Synthase † , ‡. Biochemistry 1999, 38: 12665-12674. PMID: 10504236, DOI: 10.1021/bi9907734.Peer-Reviewed Original ResearchConceptsTransition stateShort hydrogen bondsTryptophan synthaseHigh conformational flexibilityTetrahedral transition stateTransition state analogueMechanism of catalysisEnzyme-inhibitor complexStructure-based approachPhosphonate oxygenIndole-3-glycerol phosphateHydroxyl oxygenHydrogen bondsSulfur atomsActive siteC3 atomC2 atomCrystal structureConformational flexibilityCrystallographic studiesInhibitor bindingConformation changeAtomsNew herbicidesGlu-49
1998
Loop Closure and Intersubunit Communication in Tryptophan Synthase † , ‡
Schneider T, Gerhardt E, Lee M, Liang P, Anderson K, Schlichting I. Loop Closure and Intersubunit Communication in Tryptophan Synthase † , ‡. Biochemistry 1998, 37: 5394-5406. PMID: 9548921, DOI: 10.1021/bi9728957.Peer-Reviewed Original ResearchConceptsBeta-active siteMechanism of allosteric activationAlpha-active siteAlpha subunitTryptophan synthase alpha2beta2 complexPyridoxal phosphateCofactor pyridoxal phosphatePresence of serineSalmonella typhimuriumIntersubunit communicationTryptophan synthaseAllosteric activationAlpha2beta2 complexAllosteric propertiesAlpha-reactionBeta-reactionBeta subunitStructural basisAminoacrylate intermediateAminoacrylatePathwayBindingSitesTryptophanSerine
1996
Intersubunit Communication in Tryptophan Synthase by Carbon-13 and Fluorine-19 REDOR NMR †
McDowell L, Lee M, McKay R, Anderson K, Schaefer J. Intersubunit Communication in Tryptophan Synthase by Carbon-13 and Fluorine-19 REDOR NMR †. Biochemistry 1996, 35: 3328-3334. PMID: 8605170, DOI: 10.1021/bi9518297.Peer-Reviewed Original ResearchConceptsProton dipolar decouplingMagic angle spinningLocal electric field gradientsElectric field gradientIsotropic shiftsLigand bindingChemical shiftsNMR spectraConformational gatingEnzyme tryptophan synthaseBeta subunitCarbon-13Dipolar decouplingTryptophan synthaseMother liquorResolved linesConformational rearrangementsBinding of serineNMRLigandField gradientEnzyme complexIntersubunit communicationTyrosine residuesSubunit
1991
Serine modulates substrate channeling in tryptophan synthase. A novel intersubunit triggering mechanism
Anderson K, Miles E, Johnson K. Serine modulates substrate channeling in tryptophan synthase. A novel intersubunit triggering mechanism. Journal Of Biological Chemistry 1991, 266: 8020-8033. PMID: 1902468, DOI: 10.1016/s0021-9258(18)92934-0.Peer-Reviewed Original ResearchConceptsIndole-3-glycerol phosphateTryptophan synthaseProtein conformationAlpha 2 beta 2 complexReaction of serineAbsence of serineBeta siteFormation of tryptophanAlpha siteSteady-state turnoverActive siteAccumulation of indoleAlpha reactionSubstitution of cysteineSubstrate channelingBeta reactionBeta subunitMetabolic intermediatesSerineAlpha subunitQuench-flowProtein fluorescenceTurnover experimentsProteinTryptophan release