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  • American Association for the Advancement of Science (AAAS)
  • 1995-1999  (7)
  • 1
    Publication Date: 1999-09-18
    Description: The antifungal defense of Drosophila is controlled by the spaetzle/Toll/cactus gene cassette. Here, a loss-of-function mutation in the gene encoding a blood serine protease inhibitor, Spn43Ac, was shown to lead to constitutive expression of the antifungal peptide drosomycin, and this effect was mediated by the spaetzle and Toll gene products. Spaetzle was cleaved by proteolytic enzymes to its active ligand form shortly after immune challenge, and cleaved Spaetzle was constitutively present in Spn43Ac-deficient flies. Hence, Spn43Ac negatively regulates the Toll signaling pathway, and Toll does not function as a pattern recognition receptor in the Drosophila host defense.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Levashina, E A -- Langley, E -- Green, C -- Gubb, D -- Ashburner, M -- Hoffmann, J A -- Reichhart, J M -- New York, N.Y. -- Science. 1999 Sep 17;285(5435):1917-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉UPR 9022 CNRS, Institut de Biologie Moleculaire et Cellulaire, 15 Rue Rene Descartes, Strasbourg 67084, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10489372" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antifungal Agents/*metabolism ; *Antimicrobial Cationic Peptides ; Body Patterning ; Drosophila/embryology/genetics/*immunology ; *Drosophila Proteins ; Escherichia coli/genetics/immunology ; Genes, Insect ; Hemolymph/metabolism ; Insect Proteins/*biosynthesis/genetics/metabolism/*physiology ; Membrane Glycoproteins/genetics/*physiology ; Micrococcus luteus/immunology ; Molecular Sequence Data ; Mutagenesis ; Peptides/genetics/metabolism ; *Receptors, Cell Surface ; Recombinant Fusion Proteins/genetics/metabolism ; Serine Proteinase Inhibitors/genetics/*metabolism ; Serpins/genetics/*metabolism ; Signal Transduction ; Toll-Like Receptors ; Up-Regulation
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-05-21
    Description: The concept of innate immunity refers to the first-line host defense that serves to limit infection in the early hours after exposure to microorganisms. Recent data have highlighted similarities between pathogen recognition, signaling pathways, and effector mechanisms of innate immunity in Drosophila and mammals, pointing to a common ancestry of these defenses. In addition to its role in the early phase of defense, innate immunity in mammals appears to play a key role in stimulating the subsequent, clonal response of adaptive immunity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hoffmann, J A -- Kafatos, F C -- Janeway, C A -- Ezekowitz, R A -- New York, N.Y. -- Science. 1999 May 21;284(5418):1313-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Molecular and Cellular Biology, CNRS, Strasbourg, 67084, France. jhoff@ibmc.u-strasbg.fr〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10334979" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Culicidae/immunology/microbiology ; Drosophila/immunology/microbiology ; Humans ; Immunity, Active ; *Immunity, Innate ; Infection/*immunology ; Insect Vectors/immunology/microbiology ; Mammals/immunology ; Models, Immunological ; Phagocytosis ; Phylogeny ; Proteins/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
    Publication Date: 1997-12-31
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kang, S M -- Hoffmann, A -- Le, D -- Springer, M L -- Stock, P G -- Blau, H M -- F32 HL08991/HL/NHLBI NIH HHS/ -- R01-CA59717/CA/NCI NIH HHS/ -- R01-HD18179/HD/NICHD NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1997 Nov 14;278(5341):1322-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9411754" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD95/biosynthesis ; Apoptosis ; Cell Differentiation ; Cell Transplantation ; Fas Ligand Protein ; *Graft Rejection ; Immune Tolerance ; Islets of Langerhans/cytology ; *Islets of Langerhans Transplantation ; Membrane Glycoproteins/genetics/*physiology ; Mice ; Mice, Inbred C3H ; Mice, Inbred C57BL ; Muscle Fibers, Skeletal/*cytology/metabolism ; Muscle, Skeletal/*cytology/metabolism ; Neutrophils/*immunology ; Transfection
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
    Publication Date: 1998-02-12
    Description: Structural and mechanistic studies show that when the selection criteria of the immune system are changed, catalytic antibodies that have the efficiency of natural enzymes evolve, but the catalytic antibodies are much more accepting of a wide range of substrates. The catalytic antibodies were prepared by reactive immunization, a process whereby the selection criteria of the immune system are changed from simple binding to chemical reactivity. This process yielded aldolase catalytic antibodies that approximated the rate acceleration of the natural enzyme used in glycolysis. Unlike the natural enzyme, however, the antibody aldolases catalyzed a variety of aldol reactions and decarboxylations. The crystal structure of one of these antibodies identified the reactive lysine residue that was selected in the immunization process. This lysine is deeply buried in a hydrophobic pocket at the base of the binding site, thereby accounting for its perturbed pKa.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barbas, C F 3rd -- Heine, A -- Zhong, G -- Hoffmann, T -- Gramatikova, S -- Bjornestedt, R -- List, B -- Anderson, J -- Stura, E A -- Wilson, I A -- Lerner, R A -- CA27489/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1997 Dec 19;278(5346):2085-92.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Skaggs Institute for Chemical Biology and the Department of Molecular Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9405338" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Catalytic/chemistry/immunology/*metabolism ; Binding Sites ; Catalysis ; Crystallography, X-Ray ; Decarboxylation ; *Evolution, Molecular ; Fructose-Bisphosphate Aldolase/chemistry/immunology/*metabolism ; Glycolysis ; Hydrogen-Ion Concentration ; Immunization ; Immunoglobulin Fab Fragments/chemistry/immunology/*metabolism ; Kinetics ; Lysine/chemistry/metabolism ; Mice ; Models, Molecular ; Protein Conformation ; Pyridoxal/metabolism ; Selection, Genetic ; Substrate Specificity
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 5
    Publication Date: 1997-01-10
    Description: In the developing Drosophila eye, differentiation is coordinated with synchronized progression through the cell cycle. Signaling mediated by the transforming growth factor-beta-related gene decapentaplegic (dpp) was required for the synchronization of the cell cycle but not for cell fate specification. DPP may affect cell cycle synchronization by promoting cell cycle progression through the G2-M phases. This synchronization is critical for the precise assembly of the eye.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Penton, A -- Selleck, S B -- Hoffmann, F M -- New York, N.Y. -- Science. 1997 Jan 10;275(5297):203-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉McArdle Laboratory for Cancer Research and Laboratory of Genetics, University of Wisconsin Medical School, Madison, WI 53706, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8985012" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Body Patterning ; *Cell Cycle ; Cell Differentiation ; Cell Nucleus/ultrastructure ; Cyclins/metabolism ; Drosophila/*genetics/physiology ; *Drosophila Proteins ; Eye/cytology ; Female ; G1 Phase ; G2 Phase ; *Genes, Insect ; Insect Proteins/*genetics/physiology ; Male ; Membrane Glycoproteins/genetics/physiology ; Mitosis ; Mutation ; Photoreceptor Cells, Invertebrate/*cytology ; Proteoglycans/genetics/physiology ; Signal Transduction
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 6
    Publication Date: 1995-03-03
    Description: The National Aeronautics and Space Administration (NASA) Infrared Telescope Facility was used to investigate the collision of comet Shoemaker-Levy 9 with Jupiter from 12 July to 7 August 1994. Strong thermal infrared emission lasting several minutes was observed after the impacts of fragments C, G, and R. All impacts warmed the stratosphere and some the troposphere up to several degrees. The abundance of stratospheric ammonia increased by more than 50 times. Impact-related particles extended up to a level where the atmospheric pressure measured several millibars. The north polar near-infrared aurora brightened by nearly a factor of 5 a week after the impacts.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Orton, G -- A'Hearn, M -- Baines, K -- Deming, D -- Dowling, T -- Goguen, J -- Griffith, C -- Hammel, H -- Hoffmann, W -- Hunten, D -- New York, N.Y. -- Science. 1995 Mar 3;267(5202):1277-82.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Jet Propulsion Laboratory, California Institute of Technology, Pasadena 91109.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7871423" target="_blank"〉PubMed〈/a〉
    Keywords: Ammonia/analysis ; Atmosphere ; Carbon Monoxide/analysis ; *Extraterrestrial Environment ; *Jupiter ; *Solar System ; Temperature ; United States ; United States National Aeronautics and Space Administration
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 7
    Publication Date: 1996-05-10
    Description: Earth-based observations of Jupiter indicate that the Galileo probe probably entered Jupiter's atmosphere just inside a region that has less cloud cover and drier conditions than more than 99 percent of the rest of the planet. The visual appearance of the clouds at the site was generally dark at longer wavelengths. The tropospheric and stratospheric temperature fields have a strong longitudinal wave structure that is expected to manifest itself in the vertical temperature profile.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Orton -- Ortiz -- Baines -- Bjoraker -- Carsenty -- Colas -- Dayal -- Deming -- Drossart -- Frappa -- Friedson -- Goguen -- Golisch -- Griep -- Hernandez -- Hoffmann -- Jennings -- Kaminski -- Kuhn -- Laques -- Limaye -- Lin -- Lecacheux -- Martin -- McCabe -- Momary -- Parker -- Puetter -- Ressler -- Reyes -- Sada -- Spencer -- Spitale -- Stewart -- Varsik -- Warell -- Wild -- Yanamandra-Fisher -- Fazio -- Hora -- Deutsch -- New York, N.Y. -- Science. 1996 May 10;272(5263):839-40.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉G. Orton, J. Friedson, T. Martin, P. Yanamandra-Fisher, Mail Stop 169-237, Jet Propulsion Laboratory (JPL), California Institute of Technology, Pasadena, CA 91109; J. L. Ortiz, Mail Stop 169-237, JPL, and Instituto de Astrofisica de Andalucia, CSIC, P.O. Box 3004, 18080 Granada, Spain; K. Baines, Mail Stop 183-601, JPL; G. Bjoraker, D. Deming, D. Jennings, G. McCabe, P. Sada, Code 693, NASA Goddard Space Flight Center, Greenbelt, MD 20771; U. Carsenty, DLR Institute for Planetary Exploration, Rudower Chaussee 5, D-12489 Berlin, Germany; F. Colas, Bureau des Longitudes, 75015 Paris, France; A. Dayal and W. Hoffmann, Stewart Observatory, Univ. of Arizona, Tucson, AZ 85721; P. Drossart and J. Lecacheux, DESPA, Observatoire de Paris-Meudon, 92195 Meudon Cedex, France; E. Frappa and P. Laques, Observatoire Midi-Pyrenees, 65200 Bagneres de Bigorre, France; J. Goguen, Mail Stop 183-501, JPL; W. Golisch, D. Griep, C. Kaminski, J. Hora, Institute for Astronomy, Univ. of Hawaii, Honolulu, HI 96822; C. Hernandez, 9430 S.W. 29 Terrace, Miami, FL 33165; J. Kuhn, H. Lin, J. Varsik, National Solar Observatory, Sunspot, NM 88349; S. Limaye, Space Science and Engineering Center, Univ. of Wisconsin, Madison, WI 53706; T. Momary, 3806 Geology Building, Univ. of California, Los Angeles, CA 90024-1567; D. Parker, 12911 Lerida Street, Coral Gables, FL 33156; R. Puetter, CASS, Univ. of California at San Diego, La Jolla, CA 92093-0111; M. Ressler, Mail Stop 169-506, JPL; G. Reyes, Mail Stop 300-329, JPL; J. Spencer, Lowell Observatory, 1400 Mars Hill Road, Flagstaff, AZ 86001; J. Spitale and S. Stewart, Division of Geological and Planetary Sciences, 170-20, California Institute of Technology, Pasadena, CA 91125; J. Warell, Uppsala Astronomical Observatory, Box 515, S-75120 Uppsala, Sweden; W. Wild, Department of Astronomy and Astrophysics, Univ. of Chicago, Chicago, IL 60637; G. Fazio, Smithsonian Astrophysical Observatory, Cambridge, MA 02138; L. Deutsch, Five College Astronomy Department, Univ. of Massachusetts, Amherst, MA 01003.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8662571" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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