2002
Divergent regulation of the HEMA gene family encoding glutamyl-tRNA reductase in Arabidopsis thaliana: expression of HEMA2 is regulated by sugars, but is independent of light and plastid signalling
Ujwal ML, McCormac AC, Goulding A, Madan Kumar A, Söll D, Terry MJ. Divergent regulation of the HEMA gene family encoding glutamyl-tRNA reductase in Arabidopsis thaliana: expression of HEMA2 is regulated by sugars, but is independent of light and plastid signalling. Plant Molecular Biology 2002, 50: 81-89. PMID: 12139011, DOI: 10.1023/a:1016081114758.Peer-Reviewed Original ResearchMeSH KeywordsAldehyde OxidoreductasesArabidopsisBase SequenceCarbohydratesDNA, PlantFructoseGene Expression Regulation, EnzymologicGene Expression Regulation, PlantGlucoseGlucuronidaseLightMolecular Sequence DataPlants, Genetically ModifiedPlastidsPromoter Regions, GeneticRecombinant Fusion ProteinsSequence DeletionSignal TransductionSucroseConceptsGlutamyl-tRNA reductaseSynthesis pathwayLight-dependent mannerProduction of hemeKey regulatory stepL. ColPlastid signalingPlastid signalsTransgenic ArabidopsisArabidopsis thalianaHemA geneGene familyPhotosynthetic tissuesGusA expressionDeletion analysisFirst enzymeRegulatory stepALA synthesisHEMA2HEMA1Fusion constructsBp fragmentDivergent regulationArabidopsisPromoter
2001
Regulation of HEMA1 expression by phytochrome and a plastid signal during de‐etiolation in Arabidopsis thaliana
McCormac A, Fischer A, Kumar A, Söll D, Terry M. Regulation of HEMA1 expression by phytochrome and a plastid signal during de‐etiolation in Arabidopsis thaliana. The Plant Journal 2001, 25: 549-561. PMID: 11309145, DOI: 10.1046/j.1365-313x.2001.00986.x.Peer-Reviewed Original ResearchConceptsPhotosynthesis-related nuclear genesRNA gel blot analysisTetrapyrrole biosynthetic genesTransgenic Arabidopsis linesGlutamyl-tRNA reductaseGel blot analysisLow-fluence response modeRoots of seedlingsPlastid signalsArabidopsis linesNuclear genesArabidopsis thalianaPlant tetrapyrrolesBiosynthetic genesHemA genePhytochrome familyPhotosynthetic tissuesGusA expressionChlorophyll accumulationFactor signalsPromoter fragmentCis elementsALA synthesisTranscriptional levelPromoter constructs
2000
Antisense HEMA1 RNA Expression Inhibits Heme and Chlorophyll Biosynthesis in Arabidopsis1
Kumar A, Söll D. Antisense HEMA1 RNA Expression Inhibits Heme and Chlorophyll Biosynthesis in Arabidopsis1. Plant Physiology 2000, 122: 49-56. PMID: 10631248, PMCID: PMC58843, DOI: 10.1104/pp.122.1.49.Peer-Reviewed Original ResearchConceptsConstitutive cauliflower mosaic virus 35S promoterCauliflower mosaic virus 35S promoterTransgenic Arabidopsis plantsGlutamyl-tRNA reductaseBiosynthesis of tetrapyrrolesNormal growth conditionsLevels of chlorophyllFormation of ALAArabidopsis plantsChlorophyll biosynthesisHemA geneChlorophyll deficiencyGsa geneFirst enzymeGene expressionEnzymatic stepsSecond enzymeHeme synthesisPlantsReductase expressionChlorophyllGrowth conditionsBiosynthesisHemeGenes
1999
Mutations in a new Arabidopsis cyclophilin disrupt its interaction with protein phosphatase 2A
Jackson K, Söll D. Mutations in a new Arabidopsis cyclophilin disrupt its interaction with protein phosphatase 2A. Molecular Genetics And Genomics 1999, 262: 830-838. PMID: 10628867, DOI: 10.1007/s004380051147.Peer-Reviewed Original ResearchConceptsProtein phosphatase 2APhosphatase 2AHeterotrimeric protein phosphatase 2ARegulatory subunit AProtein phosphatase 2BMultiple signaling pathwaysAuxin transportPhosphatase 2BPP2A activityAntisense transcriptsResponse pathwaysArabidopsis extractsGene productsN-terminusRoot growthSubunit ASignaling pathwaysNovel cyclophilinCyclophilinArabidopsisAltered formsTranscriptsMutationsPathwayEukaryotesThe RCN1‐encoded A subunit of protein phosphatase 2A increases phosphatase activity in vivo
Deruère J, Jackson K, Garbers C, Söll D, DeLong A. The RCN1‐encoded A subunit of protein phosphatase 2A increases phosphatase activity in vivo. The Plant Journal 1999, 20: 389-399. PMID: 10607292, DOI: 10.1046/j.1365-313x.1999.00607.x.Peer-Reviewed Original ResearchConceptsProtein phosphatase 2AMutant seedlingsOrgan elongationPhosphatase 2ARegulatory subunitSerine/threonine-specific protein phosphataseT-DNA insertion mutationPhosphatase inhibitor okadaic acidCatalytic C subunitWild-type seedlingsDistinct regulatory subunitsLateral root primordiaInhibitor okadaic acidCell elongation responseLight-grown seedlingsCatalytic subunit expressionRcn1 mutationPP2A holoenzymeShoot meristemProtein phosphataseRCN1 geneC subunitLeaf primordiaElongation assaysPositive regulatorSelective inhibition of HEMA gene expression by photooxidation in Arabidopsis thaliana
Kumar M, Chaturvedi S, Söll D. Selective inhibition of HEMA gene expression by photooxidation in Arabidopsis thaliana. Phytochemistry 1999, 51: 847-851. PMID: 10423858, DOI: 10.1016/s0031-9422(99)00114-4.Peer-Reviewed Original ResearchConceptsArabidopsis thalianaChloroplasts of plantsGlutamyl-tRNA reductaseCarotenoid biosynthesisFirst enzymeALA formationPhotobleaching herbicidesPhotooxidative damageGene expressionSelective inhibitionCarotenoid pigmentsNorflurazonThalianaPlantsChloroplastsFirst precursorPathwayExpressionEnzymeInitial metaboliteAlaBiosynthesisInhibitionTetrapyrrolesGlutamate
1998
Root-Growth Behavior of the Arabidopsis Mutantrgr1 1
Mullen J, Turk E, Johnson K, Wolverton C, Ishikawa H, Simmons C, Söll D, Evans M. Root-Growth Behavior of the Arabidopsis Mutantrgr1 1. Plant Physiology 1998, 118: 1139-1145. PMID: 9847088, PMCID: PMC34730, DOI: 10.1104/pp.118.4.1139.Peer-Reviewed Original Research
1996
A mutation in protein phosphatase 2A regulatory subunit A affects auxin transport in Arabidopsis.
Garbers C, DeLong A, Deruére J, Bernasconi P, Söll D. A mutation in protein phosphatase 2A regulatory subunit A affects auxin transport in Arabidopsis. The EMBO Journal 1996, 15: 2115-2124. PMID: 8641277, PMCID: PMC450134, DOI: 10.1002/j.1460-2075.1996.tb00565.x.Peer-Reviewed Original ResearchConceptsProtein phosphatase 2AAuxin transportNaphthylphthalamic acidPhosphatase 2AProtein phosphatase 2A regulatory subunitT-DNA insertionRoot hair developmentT-DNA insertsTemperature-sensitive phenotypeRcn1 mutationROOTS CURLPhytohormone auxinArabidopsis thalianaMutant phenotypeAuxin effluxRCN1 geneRegulatory subunitHypocotyl elongationRoot branchingCell elongationShoot apexMolecular mechanismsHair developmentArabidopsisGrowth curvatureA second and differentially expressed glutamyl-tRNA reductase gene from Arabidopsis thaliana
Kumar A, Csankovszki G, Söll D. A second and differentially expressed glutamyl-tRNA reductase gene from Arabidopsis thaliana. Plant Molecular Biology 1996, 30: 419-426. PMID: 8605295, DOI: 10.1007/bf00049321.Peer-Reviewed Original ResearchConceptsAbstract5-Aminolevulinic acidHemA geneArabidopsis thalianaC5 pathwayGlutamyl-tRNA reductase geneDeduced amino acid sequenceLight-inducible genesChloroplasts of plantsGlutamyl-tRNA reductaseAmino acid sequenceA. thalianaChlorophyll biosynthesisShort intronsGenomic libraryGlutamyl-tRNARegulatory elementsALA formationNucleotide sequenceUniversal precursorAcid sequenceReductase geneGenomic DNAThalianaGenesAmino acids
1995
A novel root gravitropism mutant of Arabidopsis thaliana exhibiting altered auxin physiology
Simmons C, Migliaccio F, Masson P, Caspar T, Söll D. A novel root gravitropism mutant of Arabidopsis thaliana exhibiting altered auxin physiology. Physiologia Plantarum 1995, 93: 790-798. PMID: 11540162, DOI: 10.1111/j.1399-3054.1995.tb05133.x.Peer-Reviewed Original ResearchConceptsGravitropism mutantsPolar auxin transport inhibitorsWild-type rootsLateral root formationAuxin transport inhibitorsInsertional gene inactivationAuxin-resistant mutantsArabidopsis thalianaAuxin physiologyComplementation testsRoot gravitropismRoot hairsRGR1Gene inactivationRoot elongationWild typeMutantsHormone classesRoot formationDichlorophenoxyacetic acidVisible markersMendelian recessiveMap unitsTransport inhibitorsRoots
1994
Light regulation of chlorophyll biosynthesis at the level of 5-aminolevulinate formation in Arabidopsis.
Ilag L, Kumar A, Söll D. Light regulation of chlorophyll biosynthesis at the level of 5-aminolevulinate formation in Arabidopsis. The Plant Cell 1994, 6: 265-275. PMID: 7908550, PMCID: PMC160432, DOI: 10.1105/tpc.6.2.265.Peer-Reviewed Original ResearchMeSH KeywordsAldehyde OxidoreductasesAmino Acid SequenceAminolevulinic AcidArabidopsisChlorophyllChloroplastsEscherichia coliGene Expression RegulationGenes, PlantGlutamatesGlutamic AcidIntramolecular TransferasesIsomerasesLightMolecular Sequence DataPromoter Regions, GeneticRNA, Transfer, GluSequence Homology, Amino AcidSequence Homology, Nucleic AcidTranscription, GeneticConceptsC5 pathwayAmino acid sequenceHemA proteinChlorophyll biosynthesisGlu-tRNAALA formationAcid sequenceRNA gel blot analysisDeduced amino acid sequenceGlu-tRNA reductaseChloroplasts of plantsGel blot analysisArabidopsis genesFunctional complementationShort intronsCorresponding genesTranscriptional controlFlower tissuesLight regulationExtensive homologyFirst enzymeUniversal precursorReductase geneChlorophyll formationSecond enzymeThe ERabp Gene Family: Structural and Physiological Analyses
Palme K, Hesse T, Garbers C, Simmons C, Söll D. The ERabp Gene Family: Structural and Physiological Analyses. Basic Life Sciences 1994, 62: 155-161. PMID: 8147818, DOI: 10.1007/978-1-4757-9492-2_12.Peer-Reviewed Original ResearchConceptsGroup of phytohormonesVascular tissue differentiationBranch rootsHigh auxin levelsDifferentiation of rootsInitiation of rootsGene familyDevelopmental responsesAuxin levelsCell divisionPlant propagationPhysiological analysisPrimary rootsAdventitious rootsStem growthCell enlargementAuxinTissue differentiationHorticultural practicesStem cuttingsEthylene productionTissue cultureRootsDifferentiationPhytohormones
1992
Arabidopsis alternative oxidase sustains Escherichia coli respiration.
Kumar A, Söll D. Arabidopsis alternative oxidase sustains Escherichia coli respiration. Proceedings Of The National Academy Of Sciences Of The United States Of America 1992, 89: 10842-10846. PMID: 1438286, PMCID: PMC50438, DOI: 10.1073/pnas.89.22.10842.Peer-Reviewed Original ResearchConceptsAlternative oxidaseArabidopsis thaliana cDNA libraryGlutamyl-tRNA reductaseCyanide-insensitive respiratory pathwayAlternative oxidase activityAmino acid sequenceArabidopsis proteinsHemA geneMolecular biological investigationsCDNA libraryFirst enzymeAcid sequenceSauromatum guttatumEscherichia coli strainsSingle polypeptideRespiratory pathwayAerobic respirationRedox enzymesE. coliColi strainsPorphyrin biosynthesisGenesEnzymeProteinBiological investigations