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  • Cell Line  (381)
  • 1990-1994  (381)
  • 11
    Publication Date: 1994-11-25
    Description: Although several ion channels have been reported to be directly modulated by calcium-calmodulin, they have not been conclusively shown to bind calmodulin, nor are the modulatory mechanisms understood. Study of the olfactory cyclic nucleotide-activated cation channel, which is modulated by calcium-calmodulin, indicates that calcium-calmodulin directly binds to a specific domain on the amino terminus of the channel. This binding reduces the effective affinity of the channel for cyclic nucleotides, apparently by acting on channel gating, which is tightly coupled to ligand binding. The data reveal a control mechanism that resembles those underlying the regulation of enzymes by calmodulin. The results also point to the amino-terminal part of the olfactory channel as an element for gating, which may have general significance in the operation of ion channels with similar overall structures.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Liu, M -- Chen, T Y -- Ahamed, B -- Li, J -- Yau, K W -- EY 06837/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 1994 Nov 25;266(5189):1348-54.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Baltimore, MD.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7526466" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Binding Sites ; Calcium/*metabolism ; Calmodulin/*metabolism ; Cell Line ; Cyclic AMP/*metabolism ; Cyclic GMP/*metabolism ; Humans ; *Ion Channel Gating ; Ion Channels/chemistry/*metabolism ; Molecular Sequence Data ; Olfactory Receptor Neurons/metabolism ; Peptides/metabolism ; Protein Structure, Secondary ; Rats ; Recombinant Fusion Proteins/metabolism
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 12
    Publication Date: 1994-11-25
    Description: In this study, the cytokine-producing profile of progenitor T cells (pro-T cells) was determined. During screening of a complementary DNA library generated from activated mouse pro-T cells, a cytokine designated lymphotactin was discovered. Lymphotactin is similar to members of both the Cys-Cys and Cys-X-Cys chemokine families but lacks two of the four cysteine residues that are characteristic of the chemokines. Lymphotactin is also expressed in activated CD8+ T cells and CD4-CD8- T cell receptor alpha beta + thymocytes. It has chemotactic activity for lymphocytes but not for monocytes or neutrophils. The gene encoding lymphotactin maps to chromosome one. Taken together, these observations suggest that lymphotactin represents a novel addition to the chemokine superfamily.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kelner, G S -- Kennedy, J -- Bacon, K B -- Kleyensteuber, S -- Largaespada, D A -- Jenkins, N A -- Copeland, N G -- Bazan, J F -- Moore, K W -- Schall, T J -- New York, N.Y. -- Science. 1994 Nov 25;266(5189):1395-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Immunology, DNAX Research Institute of Cellular and Molecular Biology, Palo Alto, CA 94304.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7973732" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Calcium/metabolism ; Cell Line ; Chemokine CCL4 ; *Chemokines, C ; *Chemotaxis, Leukocyte ; Cytokines/pharmacology ; Hematopoietic Stem Cells/*immunology ; Humans ; Lymphokines/chemistry/genetics/isolation & purification/pharmacology/*physiology ; Macrophage Inflammatory Proteins ; Mice ; Mice, Inbred BALB C ; Molecular Sequence Data ; Monokines/pharmacology ; Recombinant Proteins ; Sequence Alignment ; Sialoglycoproteins/chemistry/genetics/isolation & ; purification/pharmacology/*physiology ; Signal Transduction ; T-Lymphocyte Subsets/*immunology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 13
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-11-25
    Description: The development of retroviral vectors that target specific cell types could have important implications for the design of gene therapy strategies. A chimeric protein containing the polypeptide hormone erythropoietin and part of the env protein of ecotropic Moloney murine leukemia virus was engineered into the virus. This murine virus became several times more infectious for murine cells bearing the erythropoietin receptor, and it also became infectious for human cells bearing the erythropoietin receptor. This type of tissue-specific targeting by means of ligand-receptor interactions may have broad applications to a variety of gene delivery systems.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kasahara, N -- Dozy, A M -- Kan, Y W -- AM16666/AM/NIADDK NIH HHS/ -- HL 20985/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1994 Nov 25;266(5189):1373-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Laboratory Medicine, University of California, San Francisco 94143-0724.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7973726" target="_blank"〉PubMed〈/a〉
    Keywords: 3T3 Cells ; Animals ; Base Sequence ; Cell Line ; Erythrocytes/chemistry/*virology ; Erythropoietin/genetics/metabolism ; Genetic Therapy/methods ; Genetic Vectors/*genetics/physiology ; HeLa Cells ; Humans ; Ligands ; Mice ; Molecular Sequence Data ; Moloney murine leukemia virus/*genetics/physiology ; Receptors, Erythropoietin/*metabolism ; Receptors, Virus/metabolism ; Recombinant Fusion Proteins/metabolism ; Transfection ; Tumor Cells, Cultured ; Viral Envelope Proteins/metabolism
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 14
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-11-18
    Description: The role played in immune surveillance by gamma delta T cells residing in various epithelia has not been clear. It is shown here that activated gamma delta T cells obtained from skin and intestine express the epithelial cell mitogen keratinocyte growth factor (KGF). In contrast, intraepithelial alpha beta T cells, as well as all lymphoid alpha beta and gamma delta T cell populations tested, did not produce KGF or promote the growth of cultured epithelial cells. These results suggest that intraepithelial gamma delta T cells function in surveillance and in repair of damaged epithelial tissues.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Boismenu, R -- Havran, W L -- AI32751/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1994 Nov 18;266(5188):1253-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Immunology, Scripps Research Institute, La Jolla, CA 92037.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7973709" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Cell Division ; Cell Line ; Cells, Cultured ; Cloning, Molecular ; Dendritic Cells/*physiology ; Epithelial Cells ; Fibroblast Growth Factor 10 ; Fibroblast Growth Factor 7 ; *Fibroblast Growth Factors ; Growth Substances/*biosynthesis/genetics ; Keratinocytes/*cytology ; Lymphocyte Activation ; Mice ; Molecular Sequence Data ; *Receptors, Antigen, T-Cell, gamma-delta ; T-Lymphocyte Subsets/immunology/metabolism/*physiology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 15
    Publication Date: 1994-11-18
    Description: Muscle enhancer factor-2A (MEF2A), a member of the MADS family, induced myogenic development when ectopically expressed in clones of nonmuscle cells of human clones, a function previously limited to the muscle basic helix-loop-helix (bHLH) proteins. During myogenesis, MEF2A and bHLH proteins cooperatively activate skeletal muscle genes and physically interact through the MADS domain of MEF2A and the three myogenic amino acids of the muscle bHLH proteins. Thus, skeletal myogenesis is mediated by two distinct families of mutually inducible and interactive muscle transcription factors, either of which can initiate the developmental cascade.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kaushal, S -- Schneider, J W -- Nadal-Ginard, B -- Mahdavi, V -- New York, N.Y. -- Science. 1994 Nov 18;266(5188):1236-40.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cardiology, Children's Hospital, Harvard Medical School, Boston, MA 02115.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7973707" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Binding Sites ; Cell Differentiation ; Cell Line ; DNA/metabolism ; DNA-Binding Proteins/genetics/*metabolism ; *Gene Expression Regulation ; Genes, Reporter ; Haplorhini ; Helix-Loop-Helix Motifs ; Humans ; MADS Domain Proteins ; MEF2 Transcription Factors ; Mice ; Molecular Sequence Data ; Muscle, Skeletal/*cytology/metabolism ; MyoD Protein/biosynthesis/*metabolism ; Myogenic Regulatory Factors ; Myogenin/biosynthesis/genetics/metabolism ; Transcription Factors/genetics/*metabolism ; Transfection
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  • 16
    Publication Date: 1994-11-18
    Description: The T cell antigen receptor (TCR) beta chain regulates early T cell development in the absence of the TCR alpha chain. The developmentally controlled gene described here encodes the pre-TCR alpha (pT alpha) chain, which covalently associates with TCR beta and with the CD3 proteins forms a pre-TCR complex that transduces signals in immature thymocytes. Unlike the lambda 5 pre-B cell receptor protein, the pT alpha chain is a type I transmembrane protein whose cytoplasmic tail contains two potential phosphorylation sites and a Src homology 3 (SH3)-domain binding sequence. Pre-TCR alpha transfection experiments indicated that surface expression of the pre-TCR is controlled by additional developmentally regulated proteins. Identification of the pT alpha gene represents an essential step in the structure-function analysis of the pre-TCR complex.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Saint-Ruf, C -- Ungewiss, K -- Groettrup, M -- Bruno, L -- Fehling, H J -- von Boehmer, H -- New York, N.Y. -- Science. 1994 Nov 18;266(5188):1208-12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Unite INSERM 373, Institut Necker, Paris, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7973703" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Antigens, CD3/metabolism ; Base Sequence ; Cell Line ; *Cloning, Molecular ; DNA, Complementary/genetics ; *Gene Expression Regulation, Developmental ; Gene Rearrangement ; Membrane Glycoproteins/chemistry/*genetics/metabolism ; Mice ; Mice, Inbred C57BL ; Molecular Sequence Data ; Open Reading Frames ; Phosphorylation ; Polymerase Chain Reaction ; Rabbits ; Receptors, Antigen, T-Cell, alpha-beta/chemistry/*genetics/metabolism ; Signal Transduction ; T-Lymphocytes/*immunology ; Transfection
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  • 17
    Publication Date: 1994-11-11
    Description: Interleukin-2 (IL-2) signaling requires the dimerization of the IL-2 receptor beta.(IL-2R beta) and common gamma (gamma c) chains. Mutations of gamma c can result in X-linked severe combined immunodeficiency (XSCID). IL-2, IL-4, IL-7 (whose receptors are known to contain gamma c), and IL-9 (whose receptor is shown here to contain gamma c) induced the tyrosine phosphorylation and activation of the Janus family tyrosine kinases Jak1 and Jak3. Jak1 and Jak3 associated with IL-2R beta and gamma c, respectively; IL-2 induced Jak3-IL-2R beta and increased Jak3-gamma c associations. Truncations of gamma c, and a gamma c, point mutation causing moderate X-linked combined immunodeficiency (XCID), decreased gamma c-Jak3 association. Thus, gamma c mutations in at least some XSCID and XCID patients prevent normal Jak3 activation, suggesting that mutations of Jak3 may result in an XSCID-like phenotype.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Russell, S M -- Johnston, J A -- Noguchi, M -- Kawamura, M -- Bacon, C M -- Friedmann, M -- Berg, M -- McVicar, D W -- Witthuhn, B A -- Silvennoinen, O -- P30 CA21765/CA/NCI NIH HHS/ -- R01 DK42932/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 1994 Nov 11;266(5187):1042-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Molecular Immunology, National Heart, Lung, and Blood Institute, Bethesda, MD 20892.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7973658" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Enzyme Activation ; Humans ; Interleukin-2/pharmacology ; Janus Kinase 1 ; Janus Kinase 3 ; Mutation ; Phosphorylation ; Point Mutation ; Protein-Tyrosine Kinases/genetics/*metabolism ; Receptors, Interleukin-2/genetics/*metabolism ; Severe Combined Immunodeficiency/genetics/*immunology/metabolism ; Transfection ; Tyrosine/metabolism
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  • 18
    Publication Date: 1994-11-11
    Description: When stimulated through their antigen receptor without requisite costimulation, T cells enter a state of antigen-specific unresponsiveness termed anergy. In this study, signaling through the common gamma chain of the interleukin-2 (IL-2), IL-4, and IL-7 receptors in the presence of antigen was found to be sufficient to prevent the induction of anergy. After culture with IL-2, IL-4, or IL-7, Jak3 kinase was tyrosine-phosphorylated, which correlated with the prevention of anergy. Therefore, a signal through the common gamma chain may regulate the decision of T cells to either clonally expand or enter a state of anergy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Boussiotis, V A -- Barber, D L -- Nakarai, T -- Freeman, G J -- Gribben, J G -- Bernstein, G M -- D'Andrea, A D -- Ritz, J -- Nadler, L M -- AI 35225/AI/NIAID NIH HHS/ -- CA 40216/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1994 Nov 11;266(5187):1039-42.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Hematologic Malignancies, Dana-Farber Cancer Institute, Boston, MA 02115.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7973657" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Line ; Clonal Anergy/*immunology ; Clone Cells ; HLA-DR7 Antigen/immunology ; Humans ; Interleukins/immunology ; Janus Kinase 3 ; Lymphocyte Activation ; Phosphorylation ; Protein-Tyrosine Kinases/metabolism ; Receptors, Antigen, T-Cell/metabolism ; Receptors, Interleukin-2/immunology/*metabolism ; *Signal Transduction ; T-Lymphocytes/*immunology/metabolism ; Tumor Necrosis Factor-alpha/immunology
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  • 19
    Publication Date: 1994-11-11
    Description: The interleukin-2 receptor (IL-2R) consists of three subunits: the IL-2R alpha, IL-2R beta, and IL-2R gamma chains, the last of which is also used in the receptors for IL-4, IL-7, and IL-9. Stimulation with IL-2 induces the tyrosine phosphorylation and activation of the Janus kinases Jak1 and Jak3. Jak1 and Jak3 were found to be selectively associated with the "serine-rich" region of IL-2R beta and the carboxyl-terminal region of IL-2R gamma, respectively. Both regions were necessary for IL-2 signaling. Furthermore, Jak3-negative fibroblasts expressing reconstituted IL-2R became responsive to IL-2 after the additional expression of Jak3 complementary DNA. Thus, activation of Jak1 and Jak3 may be a key event in IL-2 signaling.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Miyazaki, T -- Kawahara, A -- Fujii, H -- Nakagawa, Y -- Minami, Y -- Liu, Z J -- Oishi, I -- Silvennoinen, O -- Witthuhn, B A -- Ihle, J N -- P30 CA21765/CA/NCI NIH HHS/ -- R01 DK42932/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 1994 Nov 11;266(5187):1045-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Molecular and Cellular Biology, Osaka University, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7973659" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Enzyme Activation ; Humans ; Interleukin-2/*pharmacology ; Janus Kinase 1 ; Janus Kinase 3 ; Protein-Tyrosine Kinases/*metabolism ; Receptors, Interleukin-2/chemistry/*metabolism ; Recombinant Fusion Proteins/metabolism ; Signal Transduction ; Tyrosine/metabolism
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  • 20
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-11-04
    Description: An activity in human cell extracts is described that repairs DNA with loops of five or more unpaired bases. Repair is strand-specific and is directed by a nick located 5' or 3' to the loop. This repair is observed in a colorectal cancer cell line that is devoid of a wild-type hMLH1 gene and is deficient in repair of mismatches. However, a cell line with deletions in both hMSH2 alleles is deficient in repair of both loops and mismatches. Defects in loop repair may be relevant to the repetitive-sequence instability observed in cancers and other hereditary diseases.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Umar, A -- Boyer, J C -- Kunkel, T A -- New York, N.Y. -- Science. 1994 Nov 4;266(5186):814-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Molecular Genetics, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7973637" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptor Proteins, Signal Transducing ; Base Composition ; Base Sequence ; Carrier Proteins ; Cell Extracts ; Cell Line ; Colorectal Neoplasms/*genetics ; *DNA Repair ; DNA, Satellite/genetics/metabolism ; *DNA-Binding Proteins ; HeLa Cells ; Humans ; Molecular Sequence Data ; MutS Homolog 2 Protein ; Neoplasm Proteins/*genetics/physiology ; Nuclear Proteins ; Nucleic Acid Heteroduplexes/*metabolism ; Proto-Oncogene Proteins/*genetics/physiology ; Repetitive Sequences, Nucleic Acid ; Tumor Cells, Cultured
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