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  • 1
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    Observation of Electron Energy Discretization in Strong Field Double Ionization (2013)
    American Physical Society (APS)
    Details
    Publication Date: 2013-09-14
    Description: Author(s): K. Henrichs, M. Waitz, F. Trinter, H. Kim, A. Menssen, H. Gassert, H. Sann, T. Jahnke, J. Wu, M. Pitzer, M. Richter, M. S. Schöffler, M. Kunitski, and R. Dörner We report on the observation of discrete structures in the electron energy distribution for strong field double ionization of argon at 394 nm. The experimental conditions were chosen in order to ensure a nonsequential ejection of both electrons with an intermediate rescattering step. We have found d... [Phys. Rev. Lett. 111, 113003] Published Fri Sep 13, 2013
    Keywords: Atomic, Molecular, and Optical Physics
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
    Published by American Physical Society (APS)
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  • 2
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    Steering the Nuclear Motion in Singly Ionized Argon Dimers with Mutually Detuned Laser Pulses (2013)
    American Physical Society (APS)
    Details
    Publication Date: 2013-01-19
    Description: Author(s): J. Wu, M. Magrakvelidze, A. Vredenborg, L. Ph. H. Schmidt, T. Jahnke, A. Czasch, R. Dörner, and U. Thumm We demonstrate that the vibrational nuclear motion of singly ionized argon dimers can be controlled with two ultrashort laser pulses of different wavelengths. In particular, we observe a striking “gap” in the pump-probe-delay-dependent kinetic-energy release spectrum only if the probe-pulse waveleng... [Phys. Rev. Lett. 110, 033005] Published Fri Jan 18, 2013
    Keywords: Atomic, Molecular, and Optical Physics
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
    Published by American Physical Society (APS)
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  • 3
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    Multiorbital Tunneling Ionization of the CO Molecule (2012)
    American Physical Society (APS)
    Details
    Publication Date: 2012-05-01
    Description: Author(s): J. Wu, L. Ph. H. Schmidt, M. Kunitski, M. Meckel, S. Voss, H. Sann, H. Kim, T. Jahnke, A. Czasch, and R. Dörner We coincidently measure the molecular-frame photoelectron angular distribution and the ion sum-momentum distribution of single and double ionization of CO molecules by using circularly and elliptically polarized femtosecond laser pulses, respectively. The orientation dependent ionization rates for v... [Phys. Rev. Lett. 108, 183001] Published Mon Apr 30, 2012
    Keywords: Atomic, Molecular, and Optical Physics
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
    Published by American Physical Society (APS)
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  • 4
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    Multiple Recapture of Electrons in Multiple Ionization of the Argon Dimer by a Strong Laser Field (2011)
    American Physical Society (APS)
    Details
    Publication Date: 2011-07-21
    Description: Author(s): J. Wu, A. Vredenborg, B. Ulrich, L. Ph. H. Schmidt, M. Meckel, S. Voss, H. Sann, H. Kim, T. Jahnke, and R. Dörner We observe multiply frustrated tunneling ionization-induced dissociation of the argon dimers by intense linearly polarized ultrashort laser pulses. By measuring the kinetic energy release and angular distribution of the Coulomb explosion of up to eightfold ionized argon dimers, we can trace the reca... [Phys. Rev. Lett. 107, 043003] Published Wed Jul 20, 2011
    Keywords: Atomic, Molecular, and Optical Physics
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
    Published by American Physical Society (APS)
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  • 5
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    Coulomb Asymmetry in Strong Field Multielectron Ionization of Diatomic Molecules (2012)
    American Physical Society (APS)
    Details
    Publication Date: 2012-01-25
    Description: Author(s): J. Wu, M. Meckel, S. Voss, H. Sann, M. Kunitski, L. Ph. H. Schmidt, A. Czasch, H. Kim, T. Jahnke, and R. Dörner We measure the angular distribution of an electron emitted by a strong elliptically polarized two-color laser field from exploding doubly charged molecular nitrogen. This angular distribution is vastly different for emission of the electron from the up-field core of the molecule as compared to that ... [Phys. Rev. Lett. 108, 043002] Published Tue Jan 24, 2012
    Keywords: Atomic, Molecular, and Optical Physics
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
    Published by American Physical Society (APS)
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  • 6
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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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  • 7
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    Coordinated regulation of iron-controlling genes, H-ferritin and IRP2, by c-MYC (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-01-29
    Description: The protein encoded by the c-MYC proto-oncogene is a transcription factor that can both activate and repress the expression of target genes, but few of its transcriptional targets have been identified. Here, c-MYC is shown to repress the expression of the heavy subunit of the protein ferritin (H-ferritin), which sequesters intracellular iron, and to stimulate the expression of the iron regulatory protein-2 (IRP2), which increases the intracellular iron pool. Down-regulation of the expression of H-ferritin gene was required for cell transformation by c-MYC. These results indicate that c-MYC coordinately regulates genes controlling intracellular iron concentrations and that this function is essential for the control of cell proliferation and transformation by c-MYC.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wu, K J -- Polack, A -- Dalla-Favera, R -- CA-37165/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1999 Jan 29;283(5402):676-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Oncology, Department of Pathology, Columbia University, New York, NY 10032, USA. an.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9924025" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Division ; Cell Line ; Cell Line, Transformed ; Cell Transformation, Neoplastic ; DNA/biosynthesis ; Down-Regulation ; Ferritins/*genetics/metabolism ; *Gene Expression Regulation ; Genes, myc ; Homeostasis ; Iron/*metabolism ; Iron Regulatory Protein 2 ; Iron-Regulatory Proteins ; Iron-Sulfur Proteins/*genetics/metabolism ; Proto-Oncogene Proteins c-myc/*physiology ; RNA/metabolism ; RNA-Binding Proteins/*genetics/metabolism ; Receptors, Transferrin/genetics ; Transcription, Genetic ; 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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  • 8
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    AIM2 activates the inflammasome and cell death in response to cytoplasmic DNA (2009)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2009-01-23
    Description: Host- and pathogen-associated cytoplasmic double-stranded DNA triggers the activation of a NALP3 (also known as cryopyrin and NLRP3)-independent inflammasome, which activates caspase-1 leading to maturation of pro-interleukin-1beta and inflammation. The nature of the cytoplasmic-DNA-sensing inflammasome is currently unknown. Here we show that AIM2 (absent in melanoma 2), an interferon-inducible HIN-200 family member that contains an amino-terminal pyrin domain and a carboxy-terminal oligonucleotide/oligosaccharide-binding domain, senses cytoplasmic DNA by means of its oligonucleotide/oligosaccharide-binding domain and interacts with ASC (apoptosis-associated speck-like protein containing a CARD) through its pyrin domain to activate caspase-1. The interaction of AIM2 with ASC also leads to the formation of the ASC pyroptosome, which induces pyroptotic cell death in cells containing caspase-1. Knockdown of AIM2 by short interfering RNA reduced inflammasome/pyroptosome activation by cytoplasmic DNA in human and mouse macrophages, whereas stable expression of AIM2 in the non-responsive human embryonic kidney 293T cell line conferred responsiveness to cytoplasmic DNA. Our results show that cytoplasmic DNA triggers formation of the AIM2 inflammasome by inducing AIM2 oligomerization. This study identifies AIM2 as an important inflammasome component that senses potentially dangerous cytoplasmic DNA, leading to activation of the ASC pyroptosome and caspase-1.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2862225/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2862225/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fernandes-Alnemri, Teresa -- Yu, Je-Wook -- Datta, Pinaki -- Wu, Jianghong -- Alnemri, Emad S -- AG14357/AG/NIA NIH HHS/ -- AR055398/AR/NIAMS NIH HHS/ -- R01 AG014357/AG/NIA NIH HHS/ -- R01 AG014357-11/AG/NIA NIH HHS/ -- R01 AR055398/AR/NIAMS NIH HHS/ -- R01 AR055398-11A2/AR/NIAMS NIH HHS/ -- England -- Nature. 2009 Mar 26;458(7237):509-13. doi: 10.1038/nature07710. Epub 2009 Jan 21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Molecular Biology, Center for Apoptosis Research, Kimmel Cancer Institute, Thomas Jefferson University, Philadelphia, Pennsylvania 19107, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19158676" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Apoptosis Regulatory Proteins ; Caspase 1/metabolism ; Cell Death ; Cell Line ; Cytoplasm/*genetics ; Cytoskeletal Proteins/metabolism ; DNA/immunology/*metabolism ; DNA-Binding Proteins ; Enzyme Activation ; Humans ; Inflammation/*metabolism/*pathology ; Mice ; Nuclear Proteins/chemistry/deficiency/genetics/*metabolism ; Protein Binding
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 9
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    GSK3-TIP60-ULK1 signaling pathway links growth factor deprivation to autophagy (2012)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2012-04-28
    Description: In metazoans, cells depend on extracellular growth factors for energy homeostasis. We found that glycogen synthase kinase-3 (GSK3), when deinhibited by default in cells deprived of growth factors, activates acetyltransferase TIP60 through phosphorylating TIP60-Ser(86), which directly acetylates and stimulates the protein kinase ULK1, which is required for autophagy. Cells engineered to express TIP60(S86A) that cannot be phosphorylated by GSK3 could not undergo serum deprivation-induced autophagy. An acetylation-defective mutant of ULK1 failed to rescue autophagy in ULK1(-/-) mouse embryonic fibroblasts. Cells used signaling from GSK3 to TIP60 and ULK1 to regulate autophagy when deprived of serum but not glucose. These findings uncover an activating pathway that integrates protein phosphorylation and acetylation to connect growth factor deprivation to autophagy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lin, Shu-Yong -- Li, Terytty Yang -- Liu, Qing -- Zhang, Cixiong -- Li, Xiaotong -- Chen, Yan -- Zhang, Shi-Meng -- Lian, Guili -- Liu, Qi -- Ruan, Ka -- Wang, Zhen -- Zhang, Chen-Song -- Chien, Kun-Yi -- Wu, Jiawei -- Li, Qinxi -- Han, Jiahuai -- Lin, Sheng-Cai -- New York, N.Y. -- Science. 2012 Apr 27;336(6080):477-81. doi: 10.1126/science.1217032.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Fujian, China.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22539723" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Autophagy ; Cell Line ; Cell Line, Tumor ; Culture Media ; Culture Media, Serum-Free ; Glucose/metabolism ; Glycogen Synthase Kinase 3/genetics/*metabolism ; HEK293 Cells ; Histone Acetyltransferases/genetics/*metabolism ; Humans ; Intercellular Signaling Peptides and Proteins/metabolism ; Intracellular Signaling Peptides and Proteins/genetics/*metabolism ; Mice ; Phosphorylation ; Protein-Serine-Threonine Kinases/genetics/*metabolism ; Rats ; *Signal Transduction ; Trans-Activators/genetics/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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  • 10
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    Cyclic GMP-AMP synthase is an innate immune sensor of HIV and other retroviruses (2013)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2013-08-10
    Description: Retroviruses, including HIV, can activate innate immune responses, but the host sensors for retroviruses are largely unknown. Here we show that HIV infection activates cyclic guanosine monophosphate-adenosine monophosphate (cGAMP) synthase (cGAS) to produce cGAMP, which binds to and activates the adaptor protein STING to induce type I interferons and other cytokines. Inhibitors of HIV reverse transcriptase, but not integrase, abrogated interferon-beta induction by the virus, suggesting that the reverse-transcribed HIV DNA triggers the innate immune response. Knockout or knockdown of cGAS in mouse or human cell lines blocked cytokine induction by HIV, murine leukemia virus, and simian immunodeficiency virus. These results indicate that cGAS is an innate immune sensor of HIV and other retroviruses.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3860819/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3860819/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gao, Daxing -- Wu, Jiaxi -- Wu, You-Tong -- Du, Fenghe -- Aroh, Chukwuemika -- Yan, Nan -- Sun, Lijun -- Chen, Zhijian J -- R01 AI093967/AI/NIAID NIH HHS/ -- R01 AI098569/AI/NIAID NIH HHS/ -- R01-AI093967/AI/NIAID NIH HHS/ -- R01-AI098569/AI/NIAID NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2013 Aug 23;341(6148):903-6. doi: 10.1126/science.1240933. Epub 2013 Aug 8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390-9148, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23929945" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Gene Knockdown Techniques ; HEK293 Cells ; HIV/drug effects/enzymology/*immunology ; HIV Infections/enzymology/*immunology/virology ; HIV Reverse Transcriptase/antagonists & inhibitors ; Humans ; *Immunity, Innate ; Interferon-beta/biosynthesis ; Membrane Proteins/metabolism ; Mice ; Nucleotidyltransferases/genetics/*metabolism ; Retroviridae/immunology ; Retroviridae Infections/enzymology/immunology/virology ; Reverse Transcriptase Inhibitors/pharmacology
    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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