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  • American Association for the Advancement of Science (AAAS)  (5)
  • 1995-1999  (2)
  • 1990-1994  (3)
  • 1
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    Three-dimensional structure of dimeric human recombinant macrophage colony-stimulating factor (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-11-20
    Description: Macrophage colony-stimulating factor (M-CSF) triggers the development of cells of the monocyte-macrophage lineage and has a variety of stimulatory effects on mature cells of this class. The biologically active form of M-CSF is a disulfide-linked dimer that activates an intrinsic tyrosine kinase activity on the M-CSF receptor by inducing dimerization of the receptor molecules. The structure of a recombinant human M-CSF dimer, determined at 2.5 angstroms by x-ray crystallography, contains two bundles of four alpha helices laid end-to-end, with an interchain disulfide bond. Individual monomers of M-CSF show a close structural similarity to the cytokines granulocyte-macrophage colony-stimulating factor and human growth hormone. Both of these cytokines are monomeric in their active form, and their specific receptors lack intrinsic tyrosine kinase activity. The similarity of these structures suggests that the receptor binding determinants for all three cytokines may be similar.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pandit, J -- Bohm, A -- Jancarik, J -- Halenbeck, R -- Koths, K -- Kim, S H -- New York, N.Y. -- Science. 1992 Nov 20;258(5086):1358-62.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Structural Biology Division, Lawrence Berkeley Laboratory, Berkeley, CA 94720.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1455231" target="_blank"〉PubMed〈/a〉
    Keywords: Crystallography ; Disulfides ; Granulocyte-Macrophage Colony-Stimulating Factor/ultrastructure ; Growth Hormone/chemistry ; Macrophage Colony-Stimulating Factor/*ultrastructure ; Models, Molecular ; Protein Conformation ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Recombinant Proteins/ultrastructure ; Sequence Homology, Amino Acid ; X-Ray Diffraction
    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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    Selective activation of NF-kappa B by nerve growth factor through the neurotrophin receptor p75 (1996)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1996-04-26
    Description: Nerve growth factor (NGF), brain-derived neurotrophic factor (BDNF), and neurotrophin-3 (NT-3) selectively bind to distinct members of the Trk family of tyrosine kinase receptors, but all three bind with similar affinities to the neurotrophin receptor p75 (p75NTR). The biological significance of neurotrophin binding to p75NTR in cells that also express Trk receptors has been difficult to ascertain. In the absence of TrkA, NGF binding to p75NGR activated the transcription factor nuclear factor kappa B (NF-kappa B) in rat Schwann cells. This activation was not observed in Schwann cells isolated from mice that lacked p75NTR. The effect was selective for NGF; NF-kappa B was not activated by BDNF or NT-3.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Carter, B D -- Kaltschmidt, C -- Kaltschmidt, B -- Offenhauser, N -- Bohm-Matthaei, R -- Baeuerle, P A -- Barde, Y A -- New York, N.Y. -- Science. 1996 Apr 26;272(5261):542-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurobiochemistry, Max-Planck Institute for Psychiatry, Martinsried, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8614802" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Brain-Derived Neurotrophic Factor ; Cell Nucleus/metabolism ; Cells, Cultured ; DNA/metabolism ; L Cells (Cell Line) ; Mice ; Molecular Sequence Data ; NF-kappa B/*metabolism ; Nerve Growth Factors/*metabolism/pharmacology ; Nerve Tissue Proteins/metabolism/pharmacology ; Neurotrophin 3 ; Proto-Oncogene Proteins/metabolism ; Rats ; Receptor Protein-Tyrosine Kinases/metabolism ; Receptor, Nerve Growth Factor ; Receptor, trkA ; Receptors, Nerve Growth Factor/*metabolism ; Schwann Cells/*metabolism ; Signal Transduction/*physiology
    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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    Nanoscale complexity of phospholipid monolayers investigated by near-field scanning optical microscopy (1995)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1995-10-27
    Description: Near-field scanning optical microscopy of phospholipid monolayers doped with fluorescent lipid analogs reveals previously undescribed features in various phases, including a concentration gradient at the liquid-expanded/liquid-condensed domain boundary and weblike structures in the solid-condensed phase. Presumably, the web structures are grain boundaries between crystalline solid lipid. These structures are strongly modulated by the addition of low concentrations of cholesterol and ganglioside GM1 in the monolayer.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hwang, J -- Tamm, L K -- Bohm -- Ramalingam, T S -- Betzig, E -- Edidin, M -- AI14584/AI/NIAID NIH HHS/ -- AI30557/AI/NIAID NIH HHS/ -- DK44375/DK/NIDDK NIH HHS/ -- R37 AI030557/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1995 Oct 27;270(5236):610-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Johns Hopkins University, Baltimore, MD 21218, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7570018" target="_blank"〉PubMed〈/a〉
    Keywords: 1,2-Dipalmitoylphosphatidylcholine/*chemistry ; Boron Compounds ; Cholesterol/*chemistry ; Fluorescent Dyes ; G(M1) Ganglioside/*chemistry ; Microscopy/*methods ; Microscopy, Fluorescence ; Phosphatidylcholines ; Phospholipids/*chemistry
    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
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    Electron diffraction and imaging of uncompressed monolayers of amphiphilic molecules on vitreous and hexagonal ice (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1993-08-13
    Description: A new approach is described for probing domains of ordered self-assemblies of amphiphilic monolayers at the aqueous solution interface. The method has potential importance for the study of membrane structure, Langmuir-Blodgett films, and nucleation processes of two-and three-dimensional crystals. Electron diffraction (ED) patterns indicative of two-dimensional crystalline self-assembly were obtained from samples, which were examined by cryo-electron microscopy, of monolayers of water-insoluble amphiphiles on vitrified aqueour substrates. The apparent hexagonal symmetry of an ED pattern from a C(16)H(33)OH monolayer was interpreted in terms of multiple twinning. Monolayers of the CL(31)H(63)OH and cadmium salt of C(19)H(39)CO(2)H that were studied by dark-field techniques displayed faceted two-dimensional crystallites with a maximal size of 1 to 2 micrometers. Epitaxial nucleation of hexagonal ice by the C(31)H(63)OH monolayer has also been demonstrated by ED.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Majewski, J -- Margulis, L -- Jacquemain, D -- Leveiller, F -- Bohm, C -- Arad, T -- Talmon, Y -- Lahav, M -- Leiserowitz, L -- New York, N.Y. -- Science. 1993 Aug 13;261(5123):899-902.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17783738" 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
    Published by American Association for the Advancement of Science (AAAS)
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  • 5
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    Crystal structure of the DNA binding domain of the heat shock transcription factor (1994)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1994-01-14
    Description: The structure of the DNA binding domain, determined at 1.8 angstrom resolution, contains a three-helix bundle that is capped by a four-stranded antiparallel beta sheet. This structure is a variant of the helix-turn-helix motif, typified by catabolite activator protein. In the heat shock transcription factor, the first helix of the motif (alpha 2) has an alpha-helical bulge and a proline-induced kink. The angle between the two helices of the motif (alpha 2 and alpha 3) is about 20 degrees smaller than the average for canonical helix-turn-helix proteins. Nevertheless, the relative positions of the first and third helices of the bundle (alpha 1 and alpha 3) are conserved. It is proposed here that the first helix of the three-helix bundle be considered a component of the helix-turn-helix motif.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Harrison, C J -- Bohm, A A -- Nelson, H C -- GM08295/GM/NIGMS NIH HHS/ -- GM44086/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1994 Jan 14;263(5144):224-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Cell Biology, University of California, Berkeley 94720.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8284672" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Crystallography, X-Ray ; DNA/*metabolism ; DNA-Binding Proteins/*chemistry/metabolism ; *Heat-Shock Proteins ; *Helix-Loop-Helix Motifs ; Models, Molecular ; Molecular Sequence Data ; Protein Structure, Secondary ; Transcription Factors/*chemistry
    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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