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  • 1
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    Visualizing gene expression in time and space in the filamentous bacterium Streptomyces coelicolor (1988)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1988-05-06
    Description: Streptomycetes are prokaryotic microorganisms that exhibit a complex, mycelial fungus-like cycle of morphological differentiation. Development involves at least two spatially separated types of cells: the branching hyphae of the substrate mycelium, which penetrate the stratum upon which the colony feeds, and the upwardly protruding hyphae of the aerial mycelium, which undergo metamorphosis into spores. The luciferase-encoding luxA and luxB operon of the luminescent marine bacterium Vibrio harveyi was used as a promoter probe to visualize gene expression in differentiating colonies of Streptomyces coelicolor. Promoters for developmental genes of several kinds gave distinctive temporal and spatial patterns of light emission.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schauer, A -- Ranes, M -- Santamaria, R -- Guijarro, J -- Lawlor, E -- Mendez, C -- Chater, K -- Losick, R -- New York, N.Y. -- Science. 1988 May 6;240(4853):768-72.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cellular and Developmental Biology, Harvard University, Cambridge, MA 02138.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3363358" target="_blank"〉PubMed〈/a〉
    Keywords: DNA, Bacterial/genetics ; DNA, Recombinant ; *Gene Expression Regulation ; Luciferases/genetics ; Luminescence ; Operon ; Plasmids ; Promoter Regions, Genetic ; Streptomyces/*genetics/growth & development ; Transformation, Bacterial ; Vibrio/genetics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Chromosomal rearrangement generating a composite gene for a developmental transcription factor (1989)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1989-01-27
    Description: Differential gene expression in the mother cell chamber of sporulating cells of Bacillus subtilis is determined in part by an RNA polymerase sigma factor called sigma K (or sigma 27). The sigma K factor was assigned as the product of the sporulation gene spoIVCB on the basis of the partial aminoterminal amino acid sequence of the purified protein. The spoIVCB gene is now shown to be a truncated gene capable of specifying only the amino terminal half of sigma K. The carboxyl terminal half is specified by another sporulation gene, spoIIIC, to which spoIVCB becomes joined inframe at an intermediate stage of sporulation by site-specific recombination within a 5-base pair repeated sequence. Juxtaposition of spoIVCB and spoIIIC need not be reversible in that the mother cell and its chromosome are discarded at the end of the developmental cycle. The rearrangement of chromosomal DNA could account for the presence of sigma K selectively in the mother cell and may be a precedent for the generation of cell type-specific regulatory proteins in other developmental systems where cells undergo terminal differentiation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stragier, P -- Kunkel, B -- Kroos, L -- Losick, R -- New York, N.Y. -- Science. 1989 Jan 27;243(4890):507-12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cellular and Developmental Biology, Harvard University, Cambridge, MA 02138.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2536191" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Bacillus subtilis/*genetics/physiology ; Base Sequence ; Cloning, Molecular ; DNA Probes ; DNA Restriction Enzymes ; DNA, Bacterial/genetics ; DNA-Directed RNA Polymerases/metabolism ; *Gene Expression Regulation ; *Gene Rearrangement ; *Genes, Bacterial ; Molecular Sequence Data ; Molecular Weight ; Mutation ; Nucleic Acid Hybridization ; Sigma Factor/genetics ; Spores, Bacterial ; Transcription Factors/*genetics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Retrospective. Francois Jacob (1920-2013) (2013)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2013-05-25
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shapiro, Lucy -- Losick, Richard -- New York, N.Y. -- Science. 2013 May 24;340(6135):939. doi: 10.1126/science.1239975.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Developmental Biology, Stanford University, Stanford, CA 94305, USA. shapiro@stanford.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23704565" target="_blank"〉PubMed〈/a〉
    Keywords: DNA/genetics ; France ; *Gene Expression Regulation ; History, 20th Century ; History, 21st Century ; Molecular Biology/*history ; Nobel Prize ; Protein Biosynthesis
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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