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  • 2005-2009  (282)
  • 1995-1999  (32)
  • 1970-1974  (12)
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  • 1
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    Ribozyme-mediated repair of sickle beta-globin mRNAs in erythrocyte precursors (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-06-11
    Description: Sickle cell anemia is the most common heritable hematological disease, yet no curative treatment exists for this disorder. Moreover, the intricacies of globin gene expression have made the development of treatments for hemoglobinopathies based on gene therapy difficult. An alternative genetic approach to sickle cell therapy is based on RNA repair. A trans-splicing group I ribozyme was used to alter mutant beta-globin transcripts in erythrocyte precursors derived from peripheral blood from individuals with sickle cell disease. Sickle beta-globin transcripts were converted into messenger RNAs encoding the anti-sickling protein gamma-globin. These results suggest that RNA repair may become a useful approach in the treatment of genetic disorders.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lan, N -- Howrey, R P -- Lee, S W -- Smith, C A -- Sullenger, B A -- HL57606/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1998 Jun 5;280(5369):1593-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Genetic and Cellular Therapies, Department of Surgery, 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/9616120" target="_blank"〉PubMed〈/a〉
    Keywords: Anemia, Sickle Cell/*blood/therapy ; Cloning, Molecular ; Erythroid Precursor Cells/*metabolism ; Exons ; Fetal Blood ; Genetic Therapy ; Globins/*genetics ; Humans ; Mutation ; Polymerase Chain Reaction ; *RNA Splicing ; RNA, Catalytic/genetics/*metabolism ; RNA, Messenger/chemistry/*genetics/metabolism ; Transfection ; Uridine/metabolism
    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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    Prolyl 4-hydroxylation regulates Argonaute 2 stability (2008)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2008-08-12
    Description: Human Argonaute (Ago) proteins are essential components of the RNA-induced silencing complexes (RISCs). Argonaute 2 (Ago2) has a P-element-induced wimpy testis (PIWI) domain, which folds like RNase H and is responsible for target RNA cleavage in RNA interference. Proteins such as Dicer, TRBP, MOV10, RHA, RCK/p54 and KIAA1093 associate with Ago proteins and participate in small RNA processing, RISC loading and localization of Ago proteins in the cytoplasmic messenger RNA processing bodies. However, mechanisms that regulate RNA interference remain obscure. Here we report physical interactions between Ago2 and the alpha-(P4H-alpha(I)) and beta-(P4H-beta) subunits of the type I collagen prolyl-4-hydroxylase (C-P4H(I)). Mass spectrometric analysis identified hydroxylation of the endogenous Ago2 at proline 700. In vitro, both Ago2 and Ago4 seem to be more efficiently hydroxylated than Ago1 and Ago3 by recombinant human C-P4H(I). Importantly, human cells depleted of P4H-alpha(I) or P4H-beta by short hairpin RNA and P4H-alpha(I) null mouse embryonic fibroblast cells showed reduced stability of Ago2 and impaired short interfering RNA programmed RISC activity. Furthermore, mutation of proline 700 to alanine also resulted in destabilization of Ago2, thus linking Ago2 P700 and hydroxylation at this residue to its stability regulation. These findings identify hydroxylation as a post-translational modification important for Ago2 stability and effective RNA interference.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2661850/" 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/PMC2661850/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Qi, Hank H -- Ongusaha, Pat P -- Myllyharju, Johanna -- Cheng, Dongmei -- Pakkanen, Outi -- Shi, Yujiang -- Lee, Sam W -- Peng, Junmin -- Shi, Yang -- AG025688/AG/NIA NIH HHS/ -- GM53874/GM/NIGMS NIH HHS/ -- R01 GM053874/GM/NIGMS NIH HHS/ -- R01 GM053874-15/GM/NIGMS NIH HHS/ -- England -- Nature. 2008 Sep 18;455(7211):421-4. doi: 10.1038/nature07186. Epub 2008 Aug 6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology, Harvard Medical School, New Research Building 854, 77 Avenue Louis Pasteur, Boston, Massachusetts 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18690212" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Argonaute Proteins ; Enzyme Stability ; Eukaryotic Initiation Factor-2/*chemistry/genetics/*metabolism ; HeLa Cells ; Humans ; Hydroxylation ; Mice ; MicroRNAs/genetics ; Proline/*metabolism ; Protein Binding ; Protein Subunits ; RNA-Induced Silencing Complex/genetics/metabolism
    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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  • 3
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    A type I-secreted, sulfated peptide triggers XA21-mediated innate immunity (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-11-07
    Description: The rice Xa21 gene confers immunity to most strains of the bacterium Xanthomonas oryzae pv. oryzae (Xoo). Liquid chromatography-tandem mass spectrometry analysis of biologically active fractions from Xoo supernatants led to the identification of a 194-amino acid protein designated Ax21 (activator of XA21-mediated immunity). A sulfated, 17-amino acid synthetic peptide (axY(S)22) derived from the N-terminal region of Ax21 is sufficient for activity, whereas peptides lacking tyrosine sulfation are biologically inactive. Using coimmunoprecipitation, we found that XA21 is required for axY(S)22 binding and recognition. axY(S)22 is 100% conserved in all analyzed Xanthomonas species, confirming that Ax21 is a pathogen-associated molecular pattern and that XA21 is a pattern recognition receptor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lee, Sang-Won -- Han, Sang-Wook -- Sririyanum, Malinee -- Park, Chang-Jin -- Seo, Young-Su -- Ronald, Pamela C -- GM55962/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2009 Nov 6;326(5954):850-3. doi: 10.1126/science.1173438.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Plant Pathology, University of California, Davis, CA 95616, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19892983" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Amino Acid Substitution ; Bacterial Proteins/chemistry/genetics/isolation & purification/*metabolism ; Conserved Sequence ; Genes, Bacterial ; Host-Pathogen Interactions ; Immunity, Innate ; Immunoprecipitation ; Molecular Sequence Data ; Oryza/*immunology/metabolism/*microbiology ; Peptide Fragments/chemistry/metabolism ; Plant Diseases/*immunology/microbiology ; Plant Leaves/metabolism ; Plant Proteins/*metabolism ; Protein-Serine-Threonine Kinases/*metabolism ; Receptors, Pattern Recognition/genetics/*metabolism ; Sulfates/metabolism ; Tyrosine/metabolism ; Xanthomonas/genetics/immunology/*metabolism
    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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  • 4
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    The E3 ligase TRAF6 regulates Akt ubiquitination and activation (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-08-29
    Description: Akt signaling plays a central role in many biological functions, such as cell proliferation and apoptosis. Because Akt (also known as protein kinase B) resides primarily in the cytosol, it is not known how these signaling molecules are recruited to the plasma membrane and subsequently activated by growth factor stimuli. We found that the protein kinase Akt undergoes lysine-63 chain ubiquitination, which is important for Akt membrane localization and phosphorylation. TRAF6 was found to be a direct E3 ligase for Akt and was essential for Akt ubiquitination, membrane recruitment, and phosphorylation upon growth-factor stimulation. The human cancer-associated Akt mutant displayed an increase in Akt ubiquitination, in turn contributing to the enhancement of Akt membrane localization and phosphorylation. Thus, Akt ubiquitination is an important step for oncogenic Akt activation.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3008763/" 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/PMC3008763/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yang, Wei-Lei -- Wang, Jing -- Chan, Chia-Hsin -- Lee, Szu-Wei -- Campos, Alejandro D -- Lamothe, Betty -- Hur, Lana -- Grabiner, Brian C -- Lin, Xin -- Darnay, Bryant G -- Lin, Hui-Kuan -- R01 CA149321/CA/NCI NIH HHS/ -- R01 CA149321-02/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2009 Aug 28;325(5944):1134-8. doi: 10.1126/science.1175065.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Cellular Oncology, The University of Texas M. D. Anderson Cancer Center, Houston, TX 77030, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19713527" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Motifs ; Animals ; Apoptosis ; Cell Line ; Cell Line, Tumor ; Cell Membrane/*metabolism ; Humans ; Insulin-Like Growth Factor I/pharmacology ; Interleukin-1beta/pharmacology ; Lipopolysaccharides/pharmacology ; Mice ; Neoplasm Transplantation ; Neoplasms, Experimental/metabolism ; Phosphatidylinositol Phosphates/metabolism ; Phosphorylation ; Proto-Oncogene Proteins c-akt/chemistry/*metabolism ; *Signal Transduction ; TNF Receptor-Associated Factor 6/genetics/*metabolism ; Transplantation, Heterologous ; Ubiquitin-Protein Ligases/*metabolism ; Ubiquitination
    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
    Electronic Resource
    Electronic Resource
    Dielectric properties of metal-organic chemical vapor deposited highly textured Pb(ScTa)1−xTixO3 (x=0–0.3) relaxor ferroelectric thin films on LaNiO3 electrode buffered Si (1999)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 75 (1999), S. 2485-2487 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Highly (100) textured Pb(ScTa)1−xTixO3 (x=0–0.3) thin films were grown on LaNiO3/Pt/Ti electrode-coated Si substrate using metal-organic chemical vapor deposition at 685 °C. Ti addition was introduced to modify the dielectric properties. Diffuse phase transition, typical of relaxor ferroelectrics was noticed. As Ti content increased from 0% to 30%, the phase transition temperature (Tmax) gradually shifted from −10 to 120 °C with the dielectric constant at Tmax increased from 1397 to 1992 (1 kHz). Loss tangent values are generally below 0.025. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.125056
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  • 6
    Electronic Resource
    Electronic Resource
    Bound-to-continuum intersubband photoconductivity of self-assembled InAs quantum dots in modulation-doped heterostructures (1999)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 75 (1999), S. 1428-1430 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have designed and fabricated a quantum dot infrared photodetector which utilizes the lateral transport of photoexcited carriers in the modulation-doped AlGaAs/GaAs two-dimensional (2D) channels. A broad photocurrent signal has been observed in the photon energy range of 100–300 meV due to the bound-to-continuum intersubband absorption of normal incidence radiation in the self-assembled InAs quantum dots. A peak responsivity was as high as 4.7 A/W. The high responsivity is realized mainly by a high mobility and a long lifetime of photoexcited carriers in the modulation-doped 2D channels. Furthermore, it is found that the observed photosensitivity survives up to 190 K. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.124715
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  • 7
    Electronic Resource
    Electronic Resource
    Solder joint reliability of cavity-down plastic ball grid array assemblies (1998)
    Bradford : Emerald
    Soldering & surface mount technology 10 (1998), S. 26-31 
    Details
    ISSN: 0954-0911
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A computational model was established in this study to simulate cavity-down plastic ball grid array (PBGA) assemblies. Stress analysis was performed to investigate the solder joint reliability of a PBGA-PCB (printed circuit board) assembly. The packages under investigation had two different body sizes and two kinds of ball population. The diagonal cross-section of the assembly was modeled by plane-strain elements and was subjected to a uniform thermal loading. The solder joints were stressed due to the mismatch of the assembly's coefficient of thermal expansion (CTE). The accumulated effective plastic strain was evaluated as an index for the reliability of solder joints. Effects on solder joint reliability such as package size and ball population were identified. Furthermore, it was found that, unlike conventional PBGA assemblies, the outermost solder ball has the highest plastic strain for all cases in the present study. This peculiar phenomenon was further discussed with the consideration of package deformation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1108/09540919810203829
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  • 8
    Electronic Resource
    Electronic Resource
    Dichloro(2,6-diisopropylaniline-N)(η5-pentamethylcyclopentadienyl)rhodium(III) (1999)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 55 (1999), S. 722-724 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270198014693
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  • 9
    Electronic Resource
    Electronic Resource
    (1R,2R)-(–)-[Bis(3,5-di-tert-butylsalicylidene)-1,2-cyclohexanediamine]chloromanganese(III), an (R,R)-Jacobsen catalyst (1999)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 55 (1999), S. 1766-1769 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270199009397
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  • 10
    Electronic Resource
    Electronic Resource
    Effect of Chip Dimension and Substrate Thickness on the Solder Joint Reliability of Plastic Ball Grid Array Packages (1997)
    Bradford : Emerald
    Circuit world 23 (1997), S. 16-19 
    Details
    ISSN: 0305-6120
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Electrical Engineering, Measurement and Control Technology
    Notes: This paper presents a non-linear numerical study to investigate the effectof chip dimension and substrate thickness on the solder joint reliability of plastic ball grid array(PBGA) packages. The package under investigation was a 225-pinfull-grid PBGA assembly. The diagonal cross-section of the PBGA togetherwith the printed circuit board (PCB) was modelled by plane-strain elements. A uniform thermal loading was applied and the solder joints were stressed due to the mismatchof coefficient of thermal expansion (CTE) and constructions of the PCB assembly. The effective stress and accumulated plastic strain of solder balls against various chipdimensions and substrate thicknesses were evaluated as an index for the reliability of solderjoints. The results of this study are helpful for electronics packaging engineers to optimise thegeometry of plastic ball grid array packages.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1108/03056129710800080
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