Search results for "Antennapedia"

showing 6 items of 6 documents

Homology modeling using simulated annealing of restrained molecular dynamics and conformational search calculations with CONGEN: application in predi…

1997

We have developed an automatic approach for homology modeling using restrained molecular dynamics and simulated annealing procedures, together with conformational search algorithms available in the molecular mechanics program CONGEN (Bruccoleri RE, Karplus M, 1987, Biopolymers 26:137-168). The accuracy of the method is validated by "predicting" structures of two homeodomain proteins with known three-dimensional structures, and then applied to predict the three-dimensional structure of the homeodomain of the murine Msx-1 transcription factor. Regions of the unknown protein structure that are highly homologous to the known template structure are constrained by "homology distance constraints,"…

Models MolecularSaccharomyces cerevisiae ProteinsProtein ConformationMSX1 Transcription FactorMolecular Sequence DataSaccharomyces cerevisiaeBiologyProtein EngineeringBiochemistryProtein Structure SecondaryMolecular dynamicsMiceProtein structureAnimalsComputer SimulationHomology modelingAmino Acid SequenceMolecular BiologyHomeodomain ProteinsMSX1 Transcription FactorSequence Homology Amino AcidNuclear ProteinsProtein engineeringProtein superfamilyengrailedRepressor ProteinsCrystallographyAntennapedia Homeodomain ProteinThreading (protein sequence)AlgorithmsInformation SystemsTranscription FactorsResearch ArticleProtein science : a publication of the Protein Society
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Molecular characterization of the zerknüllt region of the Antennapedia complex of D. subobscura.

1995

We have characterized at the molecular level the zerknullt (zen) region of the Drosophila subobscura Antennapedia complex. The sequence comparison between D. subobscura and D. melanogaster shows an irregular distribution of the conserved and diverged regions, with the homeobox and a putative activating domain completely conserved. Comparisons of the promoter sequence and pattern of expression of the gene during development suggest that the regulation of zen has been conserved during evolution. The conservation of zen expression in a subpopulation of the polar cells indicates the existence of an important role in such cells. We describe a transitory segmented pattern of expression of zen in …

Molecular Sequence DataPair-rule geneGenes InsectAntennapediaGenomeChromosomesGeneticsMelanogasterAnimalsDrosophila ProteinsAmino Acid SequenceRNA MessengerCloning MolecularPromoter Regions GeneticGeneGenetics (clinical)In Situ HybridizationGeneticsHomeodomain ProteinsbiologyBase SequencefungiGenes HomeoboxChromosomeChromosome MappingGene Expression Regulation DevelopmentalNuclear Proteinsbiology.organism_classificationDrosophila subobscuraDNA-Binding ProteinsRepressor ProteinsInsect HormonesAntennapedia Homeodomain ProteinHomeoboxDrosophilaSequence AlignmentTranscription FactorsChromosoma
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In situ localization of the Antennapedia gene on the chromosomes of nine Drosophila species of the obscura group.

2008

The homeotic Antennapedia gene, cloned from the genomic DNA of D. subobscura, was localized on the polytene chromosomes of nine species of the Drosophila obscura group. In all of them, the probe used hybridized on chromosomes equivalent to the E element of Muller's terminology. These results are consistent with the idea that single copy genes do not move around the genome and that chromosomal elements have conserved their genetic identity during evolution.

Restriction MappingAntennapediaGenomeGene mappingSpecies SpecificityGeneticsAnimalsDrosophila ProteinsDrosophila (subgenus)GeneGeneticsHomeodomain ProteinsPolytene chromosomebiologyNuclear ProteinsGeneral MedicineThoraxbiology.organism_classificationBiological EvolutionChromosome BandingDNA-Binding ProteinsAntennapedia Homeodomain ProteinDrosophilaDrosophila obscuraHomeotic geneDNA ProbesTranscription FactorsHereditas
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Cell-Autonomous and Non-cell-autonomous Function of Hox Genes Specify Segmental Neuroblast Identity in the Gnathal Region of the Embryonic CNS in Dro…

2016

During central nervous system (CNS) development neural stem cells (Neuroblasts, NBs) have to acquire an identity appropriate to their location. In thoracic and abdominal segments of Drosophila, the expression pattern of Bithorax-Complex Hox genes is known to specify the segmental identity of NBs prior to their delamination from the neuroectoderm. Compared to the thoracic, ground state segmental units in the head region are derived to different degrees, and the precise mechanism of segmental specification of NBs in this region is still unclear. We identified and characterized a set of serially homologous NB-lineages in the gnathal segments and used one of them (NB6-4 lineage) as a model to i…

0301 basic medicineCentral Nervous SystemCancer ResearchEmbryologyGene ExpressionNervous SystemNeural Stem CellsAnimal CellsMedicine and Health SciencesDrosophila ProteinsHox geneGenetics (clinical)Regulation of gene expressionGeneticsNeuronsMembrane GlycoproteinsDrosophila MelanogasterGene Expression Regulation DevelopmentalAnimal ModelsProtein-Tyrosine KinasesNeural stem cellCell biologyInsectsPhenotypesembryonic structuresDrosophilaDrosophila melanogasterAnatomyCellular Structures and OrganellesCellular TypesResearch Articleanimal structuresArthropodalcsh:QH426-470ImmunoglobulinsBiologyAntennapediaResearch and Analysis Methods03 medical and health sciencesModel OrganismsNeuroblastNuclear BodiesCyclin EGeneticsAnimalsGene RegulationCell LineageMolecular BiologyEcology Evolution Behavior and SystematicsLoss functionCell NucleusHomeodomain ProteinsNeuroectodermEmbryosOrganismsBiology and Life SciencesCell Biologybiology.organism_classificationInvertebrateslcsh:Genetics030104 developmental biologyCellular NeuroscienceDevelopmental BiologyNeurosciencePLoS Genetics
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The RNA-binding protein ELAV regulates Hox RNA processing, expression and function within the Drosophila nervous system

2014

The regulated head-to-tail expression of Hox genes provides a coordinate system for the activation of specific programmes of cell differentiation according to axial level. Recent work indicates that Hox expression can be regulated via RNA processing but the underlying mechanisms and biological significance of this form of regulation remain poorly understood. Here we explore these issues within the developing Drosophila central nervous system (CNS). We show that the pan-neural RNA-binding protein (RBP) ELAV (Hu antigen) regulates the RNA processing patterns of the Hox gene Ultrabithorax (Ubx) within the embryonic CNS. Using a combination of biochemical, genetic and imaging approaches we demo…

Embryo Nonmammaliananimal structuresNeurogenesisRNA-binding proteinCellular differentiationMolecular Sequence DataRNA-binding proteinBiologyAntennapediaNervous SystemMorphogenesisAnimalsDrosophila ProteinsRNA Processing Post-TranscriptionalELAV/HuHox geneMolecular BiologyTranscription factorPhylogenyResearch ArticlesUltrabithoraxHomeodomain ProteinsAlternative polyadenylation (APA)GeneticsBase SequenceAlternative splicingGenes HomeoboxGene Expression Regulation DevelopmentalSegment-specific apoptosisHoxCell biologyDrosophila melanogasterELAV ProteinsRNA processingCentral nervous systemembryonic structuresDrosophilaDrosophila ProteinTranscription FactorsAlternative splicingDevelopmental BiologyDevelopment
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Antagonistic roles for Ultrabithorax and Antennapedia in regulating segment-specific apoptosis of differentiated motoneurons in the Drosophila embryo…

2008

The generation of morphological diversity among segmental units of the nervous system is crucial for correct matching of neurons with their targets and for formation of functional neuromuscular networks. However, the mechanisms leading to segment diversity remain largely unknown. We report here that the Hox genes Ultrabithorax (Ubx) and Antennapedia (Antp) regulate segment-specific survival of differentiated motoneurons in the ventral nerve cord of Drosophilaembryos. We show that Ubx is required to activate segment-specific apoptosis in these cells, and that their survival depends on Antp. Expression of the Ubx protein is strongly upregulated in the motoneurons shortly before they undergo a…

Nervous systemCentral Nervous SystemProgrammed cell deathanimal structuresEmbryo NonmammalianApoptosisBiologyAntennapediaDownregulation and upregulationmedicineAnimalsDrosophila ProteinsHox geneMolecular BiologyUltrabithoraxGeneticsHomeodomain ProteinsGene Expression Regulation DevelopmentalCell DifferentiationEmbryonic stem cellCell biologymedicine.anatomical_structureVentral nerve cordembryonic structuresAntennapedia Homeodomain ProteinDrosophilaDevelopmental BiologyTranscription FactorsDevelopment (Cambridge, England)
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