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  • Phosphorylation  (66)
  • American Association for the Advancement of Science (AAAS)  (66)
  • 2020-2023
  • 2020-2020
  • 2015-2019  (3)
  • 1995-1999  (63)
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  • 1
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    A small, nonpeptidyl mimic of granulocyte-colony-stimulating factor [see commetns] (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-07-10
    Description: A nonpeptidyl small molecule SB 247464, capable of activating granulocyte-colony-stimulating factor (G-CSF) signal transduction pathways, was identified in a high-throughput assay in cultured cells. Like G-CSF, SB 247464 induced tyrosine phosphorylation of multiple signaling proteins and stimulated primary murine bone marrow cells to form granulocytic colonies in vitro. It also elevated peripheral blood neutrophil counts in mice. The extracellular domain of the murine G-CSF receptor was required for the activity of SB 247464, suggesting that the compound acts by oligomerizing receptor chains. The results indicate that a small molecule can activate a receptor that normally binds a relatively large protein ligand.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tian, S S -- Lamb, P -- King, A G -- Miller, S G -- Kessler, L -- Luengo, J I -- Averill, L -- Johnson, R K -- Gleason, J G -- Pelus, L M -- Dillon, S B -- Rosen, J -- New York, N.Y. -- Science. 1998 Jul 10;281(5374):257-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Transcription Research, Ligand Pharmaceuticals, San Diego, CA 92121, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9657720" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Benzimidazoles/chemistry/metabolism/*pharmacology ; Cell Line ; Colony-Forming Units Assay ; DNA-Binding Proteins/metabolism ; Dimerization ; Female ; Granulocyte Colony-Stimulating Factor/metabolism/pharmacology ; Granulocytes/cytology ; Guanidines/chemistry/metabolism/*pharmacology ; Humans ; Janus Kinase 1 ; Janus Kinase 2 ; Leukocyte Count ; Leukopoiesis ; Mice ; Mice, Inbred C57BL ; *Milk Proteins ; Neutrophils/cytology ; Phosphorylation ; Phosphotyrosine/metabolism ; Protein-Tyrosine Kinases/metabolism ; *Proto-Oncogene Proteins ; Receptors, Granulocyte Colony-Stimulating Factor/chemistry/*metabolism ; Recombinant Fusion Proteins/chemistry/metabolism ; STAT3 Transcription Factor ; STAT5 Transcription Factor ; Signal Transduction/drug effects ; Species Specificity ; Trans-Activators/metabolism ; Transfection ; Tumor Cells, Cultured
    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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    Zeta phosphorylation without ZAP-70 activation induced by TCR antagonists or partial agonists (1995)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1995-01-27
    Description: Small changes in the peptide-major histocompatibility complex (MHC) molecule ligands recognized by antigen-specific T cell receptors (TCRs) can convert fully activating complexes into partially activating or even inhibitory ones. This study examined early TCR-dependent signals induced by such partial agonists or antagonists. In contrast to typical agonist ligands, both an antagonist and several partial agonists stimulated a distinct pattern of zeta chain phosphorylation and failed to activate associated ZAP-70 kinase. These results identify a specific step in the early tyrosine phosphorylation cascade that is altered after TCR engagement with modified peptide-MHC molecule complexes. This finding may explain the different biological responses to TCR occupancy by these variant ligands.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Madrenas, J -- Wange, R L -- Wang, J L -- Isakov, N -- Samelson, L E -- Germain, R N -- New York, N.Y. -- Science. 1995 Jan 27;267(5197):515-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Lymphocyte Biology Section, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7824949" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Clone Cells ; Cytochrome c Group/pharmacology ; Enzyme Activation ; Histocompatibility Antigens Class II/genetics/immunology/*pharmacology ; Interleukin-2/biosynthesis ; L Cells (Cell Line) ; Ligands ; Lymphocyte Activation ; Membrane Proteins/*metabolism ; Mice ; Molecular Sequence Data ; Mutation ; Peptide Fragments/pharmacology ; Phosphorylation ; Protein-Tyrosine Kinases/*metabolism ; Receptors, Antigen, T-Cell/agonists/antagonists & inhibitors/*metabolism ; Signal Transduction ; T-Lymphocytes, Helper-Inducer/*immunology ; Tyrosine/metabolism ; ZAP-70 Protein-Tyrosine Kinase
    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
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    Small peptides as potent mimetics of the protein hormone erythropoietin (1996)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1996-07-26
    Description: Random phage display peptide libraries and affinity selective methods were used to isolate small peptides that bind to and activate the receptor for the cytokine erythropoietin (EPO). In a panel of in vitro biological assays, the peptides act as full agonists and they can also stimulate erythropoiesis in mice. These agonists are represented by a 14- amino acid disulfide-bonded, cyclic peptide with the minimum consensus sequence YXCXXGPXTWXCXP, where X represents positions allowing occupation by several amino acids. The amino acid sequences of these peptides are not found in the primary sequence of EPO. The signaling pathways activated by these peptides appear to be identical to those induced by the natural ligand. This discovery may form the basis for the design of small molecule mimetics of EPO.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wrighton, N C -- Farrell, F X -- Chang, R -- Kashyap, A K -- Barbone, F P -- Mulcahy, L S -- Johnson, D L -- Barrett, R W -- Jolliffe, L K -- Dower, W J -- New York, N.Y. -- Science. 1996 Jul 26;273(5274):458-64.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Affymax Research Institute, 4001 Miranda Avenue, Palo Alto, CA 94304, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8662529" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Bacteriophages ; Cell Division/drug effects ; Cell Line ; Cloning, Molecular ; Erythropoiesis/drug effects ; Erythropoietin/chemistry/*metabolism/*pharmacology ; Humans ; Ligands ; Mice ; *Molecular Mimicry ; Molecular Sequence Data ; Mutagenesis ; Peptides, Cyclic/chemistry/*metabolism/*pharmacology ; Phosphorylation ; Protein Structure, Secondary ; Receptors, Erythropoietin/*agonists/chemistry/*metabolism ; Recombinant Fusion Proteins/chemistry/metabolism ; Signal Transduction ; Solubility ; Tyrosine/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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  • 4
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    An activating immunoreceptor complex formed by NKG2D and DAP10 (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-31
    Description: Many immune receptors are composed of separate ligand-binding and signal-transducing subunits. In natural killer (NK) and T cells, DAP10 was identified as a cell surface adaptor protein in an activating receptor complex with NKG2D, a receptor for the stress-inducible and tumor-associated major histocompatibility complex molecule MICA. Within the DAP10 cytoplasmic domain, an Src homology 2 (SH2) domain-binding site was capable of recruiting the p85 subunit of the phosphatidylinositol 3-kinase (PI 3-kinase), providing for NKG2D-dependent signal transduction. Thus, NKG2D-DAP10 receptor complexes may activate NK and T cell responses against MICA-bearing tumors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wu, J -- Song, Y -- Bakker, A B -- Bauer, S -- Spies, T -- Lanier, L L -- Phillips, J H -- AI30581/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1999 Jul 30;285(5428):730-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉DNAX Research Institute, 901 California Avenue, Palo Alto, CA 94304, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10426994" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Binding Sites ; Cell Line ; Cytotoxicity, Immunologic ; Humans ; Killer Cells, Natural/*immunology/metabolism ; Ligands ; *Lymphocyte Activation ; Membrane Proteins/chemistry/genetics/*metabolism ; Mice ; Molecular Sequence Data ; NK Cell Lectin-Like Receptor Subfamily K ; Neoplasms/immunology ; Phosphatidylinositol 3-Kinases/metabolism ; Phosphorylation ; Phosphotyrosine/metabolism ; Receptors, Immunologic/chemistry/genetics/*metabolism ; Receptors, Natural Killer Cell ; Signal Transduction ; T-Lymphocytes/*immunology/metabolism ; Tumor Cells, Cultured ; src Homology Domains
    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
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    Increased insulin sensitivity and obesity resistance in mice lacking the protein tyrosine phosphatase-1B gene (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-03-05
    Description: Protein tyrosine phosphatase-1B (PTP-1B) has been implicated in the negative regulation of insulin signaling. Disruption of the mouse homolog of the gene encoding PTP-1B yielded healthy mice that, in the fed state, had blood glucose concentrations that were slightly lower and concentrations of circulating insulin that were one-half those of their PTP-1B+/+ littermates. The enhanced insulin sensitivity of the PTP-1B-/- mice was also evident in glucose and insulin tolerance tests. The PTP-1B-/- mice showed increased phosphorylation of the insulin receptor in liver and muscle tissue after insulin injection in comparison to PTP-1B+/+ mice. On a high-fat diet, the PTP-1B-/- and PTP-1B+/- mice were resistant to weight gain and remained insulin sensitive, whereas the PTP-1B+/+ mice rapidly gained weight and became insulin resistant. These results demonstrate that PTP-1B has a major role in modulating both insulin sensitivity and fuel metabolism, thereby establishing it as a potential therapeutic target in the treatment of type 2 diabetes and obesity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Elchebly, M -- Payette, P -- Michaliszyn, E -- Cromlish, W -- Collins, S -- Loy, A L -- Normandin, D -- Cheng, A -- Himms-Hagen, J -- Chan, C C -- Ramachandran, C -- Gresser, M J -- Tremblay, M L -- Kennedy, B P -- New York, N.Y. -- Science. 1999 Mar 5;283(5407):1544-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, McGill University, 3655 Drummond Street, Montreal, Quebec, Canada, H3G 1Y6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10066179" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Blood Glucose/metabolism ; Diabetes Mellitus, Type 2/therapy ; Dietary Fats/administration & dosage ; Gene Targeting ; Glucose Tolerance Test ; Insulin/blood/*metabolism/pharmacology ; Insulin Receptor Substrate Proteins ; Insulin Resistance ; Liver/metabolism ; Male ; Mice ; Mice, Knockout ; Muscle, Skeletal/metabolism ; Obesity/*metabolism/therapy ; Phosphoproteins/metabolism ; Phosphorylation ; Phosphotyrosine/metabolism ; Protein Tyrosine Phosphatases/*genetics/*metabolism ; Receptor, Insulin/metabolism ; Signal Transduction
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 6
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    Maintenance of human T cell anergy: blocking of IL-2 gene transcription by activated Rap1 (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-10-06
    Description: In the absence of costimulation, T cells activated through their antigen receptor become unresponsive (anergic) and do not transcribe the gene encoding interleukin-2 (IL-2) when restimulated with antigen. Anergic alloantigen-specific human T cells contained phosphorylated Cbl that coimmunoprecipitated with Fyn. The adapter protein CrkL was associated with both phosphorylated Cbl and the guanidine nucleotide-releasing factor C3G, which catalyzes guanosine triphosphate (GTP) exchange on Rap1. Active Rap1 (GTP-bound form) was present in anergic cells. Forced expression of low amounts of Rap1-GTP in Jurkat T cells recapitulated the anergic defect and blocked T cell antigen receptor (TCR)- and CD28-mediated IL-2 gene transcription. Therefore, Rap1 functions as a negative regulator of TCR-mediated IL-2 gene transcription and may be responsible for the specific defect in IL-2 production in T cell anergy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Boussiotis, V A -- Freeman, G J -- Berezovskaya, A -- Barber, D L -- Nadler, L M -- AI 35225/AI/NIAID NIH HHS/ -- AI39671/AI/NIAID NIH HHS/ -- HL 54785/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1997 Oct 3;278(5335):124-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Adult Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02115, USA. vassiliki_boussiotis@macmailgw.dfci.harvard.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9311917" target="_blank"〉PubMed〈/a〉
    Keywords: *Adaptor Proteins, Signal Transducing ; Antigens, CD28/immunology ; *Clonal Anergy ; GTP-Binding Proteins/*metabolism ; Gene Expression Regulation ; Guanine Nucleotide Exchange Factors ; Guanosine Triphosphate/metabolism ; Humans ; Interleukin-2/*genetics ; Jurkat Cells ; Nuclear Proteins/metabolism ; Phosphorylation ; Protein-Tyrosine Kinases/metabolism ; Proteins/metabolism ; Proto-Oncogene Proteins/metabolism ; Proto-Oncogene Proteins c-cbl ; Proto-Oncogene Proteins c-fyn ; Receptors, Antigen, T-Cell/immunology ; Recombinant Fusion Proteins/metabolism ; Signal Transduction ; T-Lymphocytes/*immunology/metabolism ; *Transcription, Genetic ; Transfection ; *Ubiquitin-Protein Ligases ; rap GTP-Binding Proteins ; ras Guanine Nucleotide Exchange Factors ; ras Proteins/metabolism ; src Homology Domains
    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
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    Enhanced phosphorylation of p53 by ATM in response to DNA damage (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-09-11
    Description: The ATM protein, encoded by the gene responsible for the human genetic disorder ataxia telangiectasia (A-T), regulates several cellular responses to DNA breaks. ATM shares a phosphoinositide 3-kinase-related domain with several proteins, some of them protein kinases. A wortmannin-sensitive protein kinase activity was associated with endogenous or recombinant ATM and was abolished by structural ATM mutations. In vitro substrates included the translation repressor PHAS-I and the p53 protein. ATM phosphorylated p53 in vitro on a single residue, serine-15, which is phosphorylated in vivo in response to DNA damage. This activity was markedly enhanced within minutes after treatment of cells with a radiomimetic drug; the total amount of ATM remained unchanged. Various damage-induced responses may be activated by enhancement of the protein kinase activity of ATM.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Banin, S -- Moyal, L -- Shieh, S -- Taya, Y -- Anderson, C W -- Chessa, L -- Smorodinsky, N I -- Prives, C -- Reiss, Y -- Shiloh, Y -- Ziv, Y -- NS31763/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1998 Sep 11;281(5383):1674-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Human Genetics and Molecular Medicine, Sackler School of Medicine, Tel Aviv University, Ramat Aviv 69978, Israel.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9733514" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptor Proteins, Signal Transducing ; Androstadienes/pharmacology ; Ataxia Telangiectasia/metabolism ; Ataxia Telangiectasia Mutated Proteins ; *Carrier Proteins ; Cell Cycle Proteins ; Cell Line ; *DNA Damage ; DNA-Binding Proteins ; Enzyme Inhibitors/pharmacology ; Humans ; Mutation ; Phosphatidylinositol 3-Kinases/chemistry ; Phosphoproteins/metabolism ; Phosphorylation ; Protein Kinase Inhibitors ; Protein Kinases/chemistry/*metabolism ; *Protein-Serine-Threonine Kinases ; Proteins/antagonists & inhibitors/chemistry/genetics/*metabolism ; Recombinant Proteins/metabolism ; Tumor Cells, Cultured ; Tumor Suppressor Protein p53/*metabolism ; Tumor Suppressor Proteins ; Zinostatin/pharmacology
    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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  • 8
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    A role in B cell activation for CD22 and the protein tyrosine phosphatase SHP (1995)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1995-07-14
    Description: CD22 is a membrane immunoglobulin (mIg)-associated protein of B cells. CD22 is tyrosine-phosphorylated when mIg is ligated. Tyrosine-phosphorylated CD22 binds and activates SHP, a protein tyrosine phosphatase known to negatively regulate signaling through mIg. Ligation of CD22 to prevent its coaggregation with mIg lowers the threshold at which mIg activates the B cell by a factor of 100. In secondary lymphoid organs, CD22 may be sequestered away from mIg through interactions with counterreceptors on T cells. Thus, CD22 is a molecular switch for SHP that may bias mIg signaling to anatomic sites rich in T cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Doody, G M -- Justement, L B -- Delibrias, C C -- Matthews, R J -- Lin, J -- Thomas, M L -- Fearon, D T -- GM-46524/GM/NIGMS NIH HHS/ -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 1995 Jul 14;269(5221):242-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Wellcome Trust Immunology Unit, Department of Medicine, University of Cambridge, School of Clinical Medicine, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7618087" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Antigens, CD/*immunology/metabolism ; Antigens, Differentiation, B-Lymphocyte/*immunology/metabolism ; B-Lymphocytes/*immunology ; *Cell Adhesion Molecules ; Cells, Cultured ; Humans ; Immunoglobulin M/immunology ; Intracellular Signaling Peptides and Proteins ; *Lectins ; *Lymphocyte Activation ; Mice ; Molecular Sequence Data ; Phosphorylation ; Protein Tyrosine Phosphatase, Non-Receptor Type 11 ; Protein Tyrosine Phosphatase, Non-Receptor Type 6 ; Protein Tyrosine Phosphatases/*metabolism ; Recombinant Proteins/metabolism ; Sialic Acid Binding Ig-like Lectin 2 ; Signal Transduction ; Tumor Cells, Cultured
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 9
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    Hyperresponsive B cells in CD22-deficient mice (1996)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1996-11-01
    Description: CD22 is a surface glycoprotein of B lymphocytes that is rapidly phosphorylated on cytoplasmic tyrosines after antigen receptor cross-linking. Splenic B cells from mice with a disrupted CD22 gene were found to be hyperresponsive to receptor signaling: Heightened calcium fluxes and cell proliferation were obtained at lower ligand concentrations. The mice gave an augmented immune response, had an expanded peritoneal B-1 cell population, and contained increased serum titers of autoantibody. Thus, CD22 is a negative regulator of antigen receptor signaling whose onset of expression at the mature B cell stage may serve to raise the antigen concentration threshold required for B cell triggering.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉O'Keefe, T L -- Williams, G T -- Davies, S L -- Neuberger, M S -- New York, N.Y. -- Science. 1996 Nov 1;274(5288):798-801.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Medical Research Council Laboratory of Molecular Biology, Hills Road, Cambridge CB2 2QH, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8864124" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Antinuclear/blood ; Antibody Formation ; Antigens, CD/genetics/*immunology/metabolism ; Antigens, Differentiation, B-Lymphocyte/genetics/*immunology/metabolism ; B-Lymphocytes/*immunology/metabolism ; Calcium/metabolism ; *Cell Adhesion Molecules ; Female ; Gene Targeting ; Immunization ; Immunoglobulin M/blood ; Immunophenotyping ; *Lectins ; Lymphocyte Activation ; Male ; Mice ; Mice, Inbred BALB C ; Mice, Inbred C57BL ; Phosphorylation ; Receptors, Antigen, B-Cell/immunology/physiology ; Sialic Acid Binding Ig-like Lectin 2 ; Signal Transduction ; Transfection
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  • 10
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    Role of beta-arrestin in mediating agonist-promoted G protein-coupled receptor internalization (1996)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1996-01-19
    Description: beta-Arrestins are proteins that bind phosphorylated heterotrimeric GTP-binding protein (G protein)-coupled receptors (GPCRs) and contribute to the desensitization of GPCRs by uncoupling the signal transduction process. Resensitization of GPCR responsiveness involves agonist-mediated receptor sequestration. Overexpression of beta-arrestins in human embryonic kidney cells rescued the sequestration of beta 2-adrenergic receptor (beta 2AR) mutants defective in their ability to sequester, an effect enhanced by simultaneous overexpression of beta-adrenergic receptor kinase 1. Wild-type beta 2AR sequestration was inhibited by the overexpression of two beta-arrestin mutants. These findings suggest that beta-arrestins play an integral role in GPCR internalization and thus serve a dual role in the regulation of GPCR function.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ferguson, S S -- Downey, W E 3rd -- Colapietro, A M -- Barak, L S -- Menard, L -- Caron, M G -- NS 19576/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1996 Jan 19;271(5247):363-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute Laboratory, Duke University Medical Center, Durham, NC 27710, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8553074" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenergic beta-Agonists/*pharmacology ; Antigens/genetics/*physiology ; *Arrestins ; Cell Line ; Cyclic AMP-Dependent Protein Kinases/genetics/*metabolism ; DNA, Complementary ; Eye Proteins/genetics/*physiology ; GTP-Binding Proteins/*metabolism ; Humans ; Isoproterenol/pharmacology ; Mutation ; Phosphorylation ; Point Mutation ; Receptors, Adrenergic, beta-2/genetics/*metabolism ; Transfection ; beta-Adrenergic Receptor Kinases
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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