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
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
Selective 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
1994
A point mutation in Euglena gracilis chloroplast tRNA(Glu) uncouples protein and chlorophyll biosynthesis.
Stange-Thomann N, Thomann H, Lloyd A, Lyman H, Söll D. A point mutation in Euglena gracilis chloroplast tRNA(Glu) uncouples protein and chlorophyll biosynthesis. Proceedings Of The National Academy Of Sciences Of The United States Of America 1994, 91: 7947-7951. PMID: 8058739, PMCID: PMC44521, DOI: 10.1073/pnas.91.17.7947.Peer-Reviewed Original ResearchMeSH KeywordsAldehyde OxidoreductasesAnimalsBase SequenceBlotting, NorthernChlorophyllChloroplastsCloning, MolecularDNADNA PrimersEuglena gracilisIntramolecular TransferasesIsomerasesMolecular Sequence DataNucleic Acid ConformationPoint MutationPolymerase Chain ReactionProtein BiosynthesisRNA, Transfer, GluConceptsEuglena gracilis chloroplastsChlorophyll biosynthesisGlu-tRNA reductaseChlorophyll-deficient mutantsPoint mutationsChloroplast protein synthesisSequence-specific mannerDual-function moleculeC5 pathwayNADPH-dependent reductionSpecific cofactorsGluTRFirst enzymeGene productsUniversal precursorImportant identity elementAminomutase activitySequence analysisE. gracilisSecond enzymeTetrapyrrole pigmentsT-loopProtein synthesisBiosynthesisChloroplastsLight 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 enzyme
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