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  • Cells, Cultured
  • Phosphorylation
  • American Association for the Advancement of Science (AAAS)  (55)
  • American Meteorological Society
  • PANGAEA
  • 2005-2009  (55)
  • 1995-1999
  • 1990-1994
  • 2009  (55)
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  • 2005-2009  (55)
  • 1995-1999
  • 1990-1994
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  • 1
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    Motile cilia of human airway epithelia are chemosensory (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-07-25
    Description: Cilia are microscopic projections that extend from eukaryotic cells. There are two general types of cilia; primary cilia serve as sensory organelles, whereas motile cilia exert mechanical force. The motile cilia emerging from human airway epithelial cells propel harmful inhaled material out of the lung. We found that these cells express sensory bitter taste receptors, which localized on motile cilia. Bitter compounds increased the intracellular calcium ion concentration and stimulated ciliary beat frequency. Thus, airway epithelia contain a cell-autonomous system in which motile cilia both sense noxious substances entering airways and initiate a defensive mechanical mechanism to eliminate the offending compound. Hence, like primary cilia, classical motile cilia also contain sensors to detect the external environment.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2894709/" 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/PMC2894709/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shah, Alok S -- Ben-Shahar, Yehuda -- Moninger, Thomas O -- Kline, Joel N -- Welsh, Michael J -- DK54759/DK/NIDDK NIH HHS/ -- HL51670/HL/NHLBI NIH HHS/ -- P01 HL051670/HL/NHLBI NIH HHS/ -- P01 HL051670-15/HL/NHLBI NIH HHS/ -- P30 DK054759/DK/NIDDK NIH HHS/ -- P30 DK054759-109004/DK/NIDDK NIH HHS/ -- P30 DK054759-13/DK/NIDDK NIH HHS/ -- R01 DK051315/DK/NIDDK NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2009 Aug 28;325(5944):1131-4. doi: 10.1126/science.1173869. Epub 2009 Jul 23.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Internal Medicine, University of Iowa, Iowa City, IA 52242, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19628819" target="_blank"〉PubMed〈/a〉
    Keywords: Bronchi/cytology ; Calcium/metabolism ; Cells, Cultured ; Cilia/metabolism/*physiology ; Epithelial Cells/*metabolism ; Humans ; Monoterpenes/metabolism/pharmacology ; Movement ; Noxae ; Phospholipase C beta/metabolism ; Quaternary Ammonium Compounds/metabolism/pharmacology ; Receptors, G-Protein-Coupled/*metabolism ; Respiratory Mucosa/cytology/*metabolism ; *Signal Transduction ; *Taste ; Trachea/cytology ; Transducin/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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  • 2
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    Function of mitochondrial Stat3 in cellular respiration (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-01-10
    Description: Cytokines such as interleukin-6 induce tyrosine and serine phosphorylation of Stat3 that results in activation of Stat3-responsive genes. We provide evidence that Stat3 is present in the mitochondria of cultured cells and primary tissues, including the liver and heart. In Stat3(-/-) cells, the activities of complexes I and II of the electron transport chain (ETC) were significantly decreased. We identified Stat3 mutants that selectively restored the protein's function as a transcription factor or its functions within the ETC. In mice that do not express Stat3 in the heart, there were also selective defects in the activities of complexes I and II of the ETC. These data indicate that Stat3 is required for optimal function of the ETC, which may allow it to orchestrate responses to cellular homeostasis.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2758306/" 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/PMC2758306/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wegrzyn, Joanna -- Potla, Ramesh -- Chwae, Yong-Joon -- Sepuri, Naresh B V -- Zhang, Qifang -- Koeck, Thomas -- Derecka, Marta -- Szczepanek, Karol -- Szelag, Magdalena -- Gornicka, Agnieszka -- Moh, Akira -- Moghaddas, Shadi -- Chen, Qun -- Bobbili, Santha -- Cichy, Joanna -- Dulak, Jozef -- Baker, Darren P -- Wolfman, Alan -- Stuehr, Dennis -- Hassan, Medhat O -- Fu, Xin-Yuan -- Avadhani, Narayan -- Drake, Jennifer I -- Fawcett, Paul -- Lesnefsky, Edward J -- Larner, Andrew C -- CA098924/CA/NCI NIH HHS/ -- P01AG15885/AG/NIA NIH HHS/ -- R01 AI059710/AI/NIAID NIH HHS/ -- R01 AI059710-03/AI/NIAID NIH HHS/ -- R01 AI059710-04/AI/NIAID NIH HHS/ -- R01 CA098924/CA/NCI NIH HHS/ -- R01 CA098924-03/CA/NCI NIH HHS/ -- R01 CA098924-04/CA/NCI NIH HHS/ -- R01 CA098924-05/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2009 Feb 6;323(5915):793-7. doi: 10.1126/science.1164551. Epub 2009 Jan 8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Molecular Biology and Massey Cancer Center, Virginia Commonwealth University, Richmond, VA 23298, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19131594" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Cell Respiration ; Cells, Cultured ; Electron Transport Complex I/metabolism ; Electron Transport Complex II/metabolism ; Homeostasis ; Mice ; Mitochondria/*metabolism ; Mitochondria, Heart/metabolism ; Mitochondria, Liver/metabolism ; Mitochondrial Membranes/metabolism ; NADH, NADPH Oxidoreductases/metabolism ; Oxidative Phosphorylation ; Phosphorylation ; Precursor Cells, B-Lymphoid/metabolism ; STAT3 Transcription Factor/chemistry/*metabolism ; Serine/metabolism ; Signal Transduction
    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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    Pulsatile stimulation determines timing and specificity of NF-kappaB-dependent transcription (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-04-11
    Description: The nuclear factor kappaB (NF-kappaB) transcription factor regulates cellular stress responses and the immune response to infection. NF-kappaB activation results in oscillations in nuclear NF-kappaB abundance. To define the function of these oscillations, we treated cells with repeated short pulses of tumor necrosis factor-alpha at various intervals to mimic pulsatile inflammatory signals. At all pulse intervals that were analyzed, we observed synchronous cycles of NF-kappaB nuclear translocation. Lower frequency stimulations gave repeated full-amplitude translocations, whereas higher frequency pulses gave reduced translocation, indicating a failure to reset. Deterministic and stochastic mathematical models predicted how negative feedback loops regulate both the resetting of the system and cellular heterogeneity. Altering the stimulation intervals gave different patterns of NF-kappaB-dependent gene expression, which supports the idea that oscillation frequency has a functional role.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2785900/" 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/PMC2785900/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ashall, Louise -- Horton, Caroline A -- Nelson, David E -- Paszek, Pawel -- Harper, Claire V -- Sillitoe, Kate -- Ryan, Sheila -- Spiller, David G -- Unitt, John F -- Broomhead, David S -- Kell, Douglas B -- Rand, David A -- See, Violaine -- White, Michael R H -- BB/C007158/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- BB/C008219/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- BB/C520471/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- BB/D010748/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- BB/E004210/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- BB/E012965/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- BB/F005938/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- BBC0071581/Biotechnology and Biological Sciences Research Council/United Kingdom -- BBC0082191/Biotechnology and Biological Sciences Research Council/United Kingdom -- BBC5204711/Biotechnology and Biological Sciences Research Council/United Kingdom -- BBD0107481/Biotechnology and Biological Sciences Research Council/United Kingdom -- BBF0059381/Biotechnology and Biological Sciences Research Council/United Kingdom -- G0500346/Medical Research Council/United Kingdom -- G0500346(73596)/Medical Research Council/United Kingdom -- New York, N.Y. -- Science. 2009 Apr 10;324(5924):242-6. doi: 10.1126/science.1164860.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Centre for Cell Imaging, School of Biological Sciences, Bioscience Research Building, Crown Street, Liverpool, L69 7ZB, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19359585" target="_blank"〉PubMed〈/a〉
    Keywords: Active Transport, Cell Nucleus ; Animals ; Cell Line ; Cell Line, Tumor ; Cell Nucleus/metabolism ; Cytoplasm/metabolism ; Feedback, Physiological ; *Gene Expression ; Humans ; I-kappa B Proteins/metabolism ; Mice ; Models, Biological ; Models, Statistical ; NF-kappa B/*metabolism ; Phosphorylation ; Recombinant Fusion Proteins/metabolism ; Stochastic Processes ; Transcription Factor RelA/*metabolism ; *Transcription, Genetic ; Transfection ; Tumor Necrosis Factor-alpha/*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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    Global analysis of Cdk1 substrate phosphorylation sites provides insights into evolution (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-09-26
    Description: To explore the mechanisms and evolution of cell-cycle control, we analyzed the position and conservation of large numbers of phosphorylation sites for the cyclin-dependent kinase Cdk1 in the budding yeast Saccharomyces cerevisiae. We combined specific chemical inhibition of Cdk1 with quantitative mass spectrometry to identify the positions of 547 phosphorylation sites on 308 Cdk1 substrates in vivo. Comparisons of these substrates with orthologs throughout the ascomycete lineage revealed that the position of most phosphorylation sites is not conserved in evolution; instead, clusters of sites shift position in rapidly evolving disordered regions. We propose that the regulation of protein function by phosphorylation often depends on simple nonspecific mechanisms that disrupt or enhance protein-protein interactions. The gain or loss of phosphorylation sites in rapidly evolving regions could facilitate the evolution of kinase-signaling circuits.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2813701/" 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/PMC2813701/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Holt, Liam J -- Tuch, Brian B -- Villen, Judit -- Johnson, Alexander D -- Gygi, Steven P -- Morgan, David O -- GM037049/GM/NIGMS NIH HHS/ -- GM50684/GM/NIGMS NIH HHS/ -- HG3456/HG/NHGRI NIH HHS/ -- R01 GM069901/GM/NIGMS NIH HHS/ -- R01 GM069901-06/GM/NIGMS NIH HHS/ -- R01 HG003456/HG/NHGRI NIH HHS/ -- R01 HG003456-06/HG/NHGRI NIH HHS/ -- New York, N.Y. -- Science. 2009 Sep 25;325(5948):1682-6. doi: 10.1126/science.1172867.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Departments of Physiology and Biochemistry and Biophysics, University of California, San Francisco, San Francisco, CA 94158, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19779198" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Motifs ; Amino Acid Sequence ; Ascomycota/chemistry/genetics/metabolism ; *Biological Evolution ; CDC2 Protein Kinase/antagonists & inhibitors/*metabolism ; *Cell Cycle ; Cell Physiological Processes ; Computational Biology ; *Evolution, Molecular ; Molecular Sequence Data ; Phosphopeptides/chemistry/*metabolism ; Phosphorylation ; Phylogeny ; Protein Conformation ; Protein Structure, Tertiary ; Saccharomyces cerevisiae/chemistry/genetics/metabolism ; Saccharomyces cerevisiae Proteins/chemistry/*metabolism ; *Signal Transduction ; Substrate Specificity
    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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    Biochemistry. A glucose-to-gene link (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-05-23
    Description: 〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2788238/" 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/PMC2788238/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rathmell, Jeffrey C -- Newgard, Christopher B -- R01 CA123350/CA/NCI NIH HHS/ -- R01 CA123350-03/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2009 May 22;324(5930):1021-2. doi: 10.1126/science.1174665.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology and Cancer Biology, Sarah W. Stedman Nutrition and Metabolism Center, 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/19460991" target="_blank"〉PubMed〈/a〉
    Keywords: ATP Citrate (pro-S)-Lyase/genetics/*metabolism ; Acetate-CoA Ligase/metabolism ; Acetyl Coenzyme A/*metabolism ; Acetylation ; Animals ; Cell Nucleus/enzymology ; Cells, Cultured ; Chromatin/*metabolism ; Citric Acid/metabolism ; Gene Expression Regulation ; Glucose/*metabolism ; Glycolysis ; Histones/*metabolism ; Humans ; *Transcription, Genetic
    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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  • 6
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    Small-molecule activators of a proenzyme (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-11-07
    Description: Virtually all of the 560 human proteases are stored as inactive proenyzmes and are strictly regulated. We report the identification and characterization of the first small molecules that directly activate proenzymes, the apoptotic procaspases-3 and -6. It is surprising that these compounds induce autoproteolytic activation by stabilizing a conformation that is both more active and more susceptible to intermolecular proteolysis. These procaspase activators bypass the normal upstream proapoptotic signaling cascades and induce rapid apoptosis in a variety of cell lines. Systematic biochemical and biophysical analyses identified a cluster of mutations in procaspase-3 that resist small-molecule activation both in vitro and in cells. Compounds that induce gain of function are rare, and the activators reported here will enable direct control of the executioner caspases in apoptosis and in cellular differentiation. More generally, these studies presage the discovery of other proenzyme activators to explore fundamental processes of proenzyme activation and their fate-determining roles in biology.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2886848/" 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/PMC2886848/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wolan, Dennis W -- Zorn, Julie A -- Gray, Daniel C -- Wells, James A -- F32 CA119641/CA/NCI NIH HHS/ -- F32 CA119641-03/CA/NCI NIH HHS/ -- R01 CA136779/CA/NCI NIH HHS/ -- R21 N5057022/PHS HHS/ -- New York, N.Y. -- Science. 2009 Nov 6;326(5954):853-8. doi: 10.1126/science.1177585.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmaceutical Chemistry, University of California, San Francisco, Byers Hall, 1700 4th Street, San Francisco, CA 94158, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19892984" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Apoptosis ; Benzopyrans/chemistry/*metabolism/pharmacology ; Biocatalysis ; Caspase 3/chemistry/genetics/*metabolism ; Caspase 6/chemistry/genetics/*metabolism ; Caspase Inhibitors ; Catalytic Domain ; Cell Line, Transformed ; Cell Line, Tumor ; Cells, Cultured ; Enzyme Activation ; Enzyme Activators/chemistry/*metabolism/pharmacology ; Enzyme Inhibitors/metabolism/pharmacology ; Enzyme Precursors/antagonists & inhibitors/chemistry/genetics/*metabolism ; Granzymes/metabolism ; Humans ; Imidazoles/chemistry/*metabolism/pharmacology ; Kinetics ; Mice ; Molecular Structure ; Mutagenesis ; Pyridines/chemistry/*metabolism/pharmacology ; Signal Transduction ; Small Molecule Libraries/chemistry/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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  • 7
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    The hallucinogen N,N-dimethyltryptamine (DMT) is an endogenous sigma-1 receptor regulator (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-02-14
    Description: The sigma-1 receptor is widely distributed in the central nervous system and periphery. Originally mischaracterized as an opioid receptor, the sigma-1 receptor binds a vast number of synthetic compounds but does not bind opioid peptides; it is currently considered an orphan receptor. The sigma-1 receptor pharmacophore includes an alkylamine core, also found in the endogenous compound N,N-dimethyltryptamine (DMT). DMT acts as a hallucinogen, but its receptor target has been unclear. DMT bound to sigma-1 receptors and inhibited voltage-gated sodium ion (Na+) channels in both native cardiac myocytes and heterologous cells that express sigma-1 receptors. DMT induced hypermobility in wild-type mice but not in sigma-1 receptor knockout mice. These biochemical, physiological, and behavioral experiments indicate that DMT is an endogenous agonist for the sigma-1 receptor.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2947205/" 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/PMC2947205/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fontanilla, Dominique -- Johannessen, Molly -- Hajipour, Abdol R -- Cozzi, Nicholas V -- Jackson, Meyer B -- Ruoho, Arnold E -- F31 DA022932/DA/NIDA NIH HHS/ -- NS30016/NS/NINDS NIH HHS/ -- R01 MH065503/MH/NIMH NIH HHS/ -- R01 MH065503-01A1/MH/NIMH NIH HHS/ -- R01 NS030016/NS/NINDS NIH HHS/ -- R01 NS030016-08/NS/NINDS NIH HHS/ -- R01 NS030016-09/NS/NINDS NIH HHS/ -- T32 GM08688/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2009 Feb 13;323(5916):934-7. doi: 10.1126/science.1166127.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology, University of Wisconsin School of Medicine and Public Health, Madison, WI 53706, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19213917" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; COS Cells ; Cell Line ; Cells, Cultured ; Cercopithecus aethiops ; Guinea Pigs ; Hallucinogens/*metabolism ; Ligands ; Mice ; Mice, Inbred C57BL ; Mice, Knockout ; Myocardium/metabolism ; N,N-Dimethyltryptamine/*metabolism ; Rats ; Receptors, sigma/agonists/antagonists & inhibitors/*metabolism ; Tryptamines/metabolism
    Print ISSN: 0036-8075
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  • 8
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    Structure of the LKB1-STRAD-MO25 complex reveals an allosteric mechanism of kinase activation (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-11-07
    Description: The LKB1 tumor suppressor is a protein kinase that controls the activity of adenosine monophosphate-activated protein kinase (AMPK). LKB1 activity is regulated by the pseudokinase STRADalpha and the scaffolding protein MO25alpha through an unknown, phosphorylation-independent, mechanism. We describe the structure of the core heterotrimeric LKB1-STRADalpha-MO25alpha complex, revealing an unusual allosteric mechanism of LKB1 activation. STRADalpha adopts a closed conformation typical of active protein kinases and binds LKB1 as a pseudosubstrate. STRADalpha and MO25alpha promote the active conformation of LKB1, which is stabilized by MO25alpha interacting with the LKB1 activation loop. This previously undescribed mechanism of kinase activation may be relevant to understanding the evolution of other pseudokinases. The structure also reveals how mutations found in Peutz-Jeghers syndrome and in various sporadic cancers impair LKB1 function.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3518268/" 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/PMC3518268/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zeqiraj, Elton -- Filippi, Beatrice Maria -- Deak, Maria -- Alessi, Dario R -- van Aalten, Daan M F -- 087590/Wellcome Trust/United Kingdom -- C33794/A10969/Cancer Research UK/United Kingdom -- G0900138/Medical Research Council/United Kingdom -- MC_U127070193/Medical Research Council/United Kingdom -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 2009 Dec 18;326(5960):1707-11. doi: 10.1126/science.1178377. Epub 2009 Nov 5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Molecular Microbiology, College of Life Sciences, University of Dundee, Dundee DD1 5EH, Scotland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19892943" target="_blank"〉PubMed〈/a〉
    Keywords: AMP-Activated Protein Kinases/metabolism ; Adaptor Proteins, Vesicular Transport/*chemistry/metabolism ; Allosteric Regulation ; Amino Acid Sequence ; Binding Sites ; Calcium-Binding Proteins/*chemistry/metabolism ; Crystallography, X-Ray ; Enzyme Activation ; Humans ; Models, Molecular ; Molecular Sequence Data ; Multiprotein Complexes/chemistry/metabolism ; Mutant Proteins/chemistry/metabolism ; Mutation ; Phosphorylation ; Protein Binding ; Protein Conformation ; Protein Interaction Domains and Motifs ; Protein Structure, Tertiary ; Protein-Serine-Threonine Kinases/*chemistry/metabolism
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  • 9
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    Extinction-reconsolidation boundaries: key to persistent attenuation of fear memories (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-04-04
    Description: Dysregulation of the fear system is at the core of many psychiatric disorders. Much progress has been made in uncovering the neural basis of fear learning through studies in which associative emotional memories are formed by pairing an initially neutral stimulus (conditioned stimulus, CS; e.g., a tone) to an unconditioned stimulus (US; e.g., a shock). Despite recent advances, the question of how to persistently weaken aversive CS-US associations, or dampen traumatic memories in pathological cases, remains a major dilemma. Two paradigms (blockade of reconsolidation and extinction) have been used in the laboratory to reduce acquired fear. Unfortunately, their clinical efficacy is limited: Reconsolidation blockade typically requires potentially toxic drugs, and extinction is not permanent. Here, we describe a behavioral design in which a fear memory in rats is destabilized and reinterpreted as safe by presenting an isolated retrieval trial before an extinction session. This procedure permanently attenuates the fear memory without the use of drugs.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3625935/" 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/PMC3625935/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Monfils, Marie-H -- Cowansage, Kiriana K -- Klann, Eric -- LeDoux, Joseph E -- F31 MH083472/MH/NIMH NIH HHS/ -- F31 MH083472-01A1/MH/NIMH NIH HHS/ -- F31MH083472/MH/NIMH NIH HHS/ -- K05 MH067048/MH/NIMH NIH HHS/ -- NS034007/NS/NINDS NIH HHS/ -- NS047384/NS/NINDS NIH HHS/ -- P50 MH058911/MH/NIMH NIH HHS/ -- R01 MH046516/MH/NIMH NIH HHS/ -- R37 MH038774/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 2009 May 15;324(5929):951-5. doi: 10.1126/science.1167975. Epub 2009 Apr 2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Neural Science, New York University, New York, NY 10003, USA. monfils@mail.utexas.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19342552" target="_blank"〉PubMed〈/a〉
    Keywords: Amygdala/physiology ; Animals ; Conditioning, Classical ; Extinction, Psychological/*physiology ; *Fear ; Male ; Memory/*physiology ; Mental Recall/*physiology ; Phosphorylation ; Rats ; Receptors, AMPA/metabolism
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  • 10
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    Tuning the activation threshold of a kinase network by nested feedback loops (2009)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2009-04-25
    Description: Determining proper responsiveness to incoming signals is fundamental to all biological systems. We demonstrate that intracellular signaling nodes can tune a signaling network's response threshold away from the basal median effective concentration established by ligand-receptor interactions. Focusing on the bistable kinase network that governs progesterone-induced meiotic entry in Xenopus oocytes, we characterized glycogen synthase kinase-3beta (GSK-3beta) as a dampener of progesterone responsiveness. GSK-3beta engages the meiotic kinase network through a double-negative feedback loop; this specific feedback architecture raises the progesterone threshold in correspondence with the strength of double-negative signaling. We also identified a marker of nutritional status, l-leucine, which lowers the progesterone threshold, indicating that oocytes integrate additional signals into their cell-fate decisions by modulating progesterone responsiveness.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2880456/" 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/PMC2880456/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Justman, Quincey A -- Serber, Zach -- Ferrell, James E Jr -- El-Samad, Hana -- Shokat, Kevan M -- AI49006/AI/NIAID NIH HHS/ -- GM46383/GM/NIGMS NIH HHS/ -- R01 AI044009/AI/NIAID NIH HHS/ -- R01 AI044009-10/AI/NIAID NIH HHS/ -- R01 GM046383/GM/NIGMS NIH HHS/ -- R01 GM046383-19/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2009 Apr 24;324(5926):509-12. doi: 10.1126/science.1169498.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Graduate Group in Biophysics, University of California, San Francisco, CA 94158, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19390045" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Enzyme Activation ; Feedback, Physiological ; Glycogen Synthase Kinase 3/*metabolism ; Leucine/metabolism ; *MAP Kinase Signaling System/physiology ; Meiosis/physiology ; Mitogen-Activated Protein Kinases/metabolism ; Models, Biological ; Oocytes/*cytology/*metabolism ; Oogenesis/*physiology ; Phosphorylation ; Progesterone/*physiology ; Xenopus
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  • 11
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    Cell signaling. Aging is RSKy business (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-10-03
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kaeberlein, Matt -- Kapahi, Pankaj -- R01 AG031108/AG/NIA NIH HHS/ -- New York, N.Y. -- Science. 2009 Oct 2;326(5949):55-6. doi: 10.1126/science.1181034.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology, University of Washington, Seattle, WA 98195, USA. kaeber@u.washington.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19797648" target="_blank"〉PubMed〈/a〉
    Keywords: AMP-Activated Protein Kinases/genetics/metabolism ; Aging/*physiology ; Animals ; Caloric Restriction ; Enzyme Activation ; Female ; Gene Expression ; Longevity/*physiology ; Male ; Mice ; Mice, Knockout ; Oligonucleotide Array Sequence Analysis ; Phosphorylation ; Protein Biosynthesis ; Protein Kinases/metabolism ; Protein Subunits ; Ribosomal Protein S6/*metabolism ; Ribosomal Protein S6 Kinases, 90-kDa/genetics/*metabolism ; *Signal Transduction ; Sirolimus/pharmacology ; TOR Serine-Threonine Kinases
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  • 12
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    The insect neuropeptide PTTH activates receptor tyrosine kinase torso to initiate metamorphosis (2009)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2009-12-08
    Description: Holometabolous insects undergo complete metamorphosis to become sexually mature adults. Metamorphosis is initiated by brain-derived prothoracicotropic hormone (PTTH), which stimulates the production of the molting hormone ecdysone via an incompletely defined signaling pathway. Here we demonstrate that Torso, a receptor tyrosine kinase that regulates embryonic terminal cell fate in Drosophila, is the PTTH receptor. Trunk, the embryonic Torso ligand, is related to PTTH, and ectopic expression of PTTH in the embryo partially rescues trunk mutants. In larvae, torso is expressed specifically in the prothoracic gland (PG), and its loss phenocopies the removal of PTTH. The activation of Torso by PTTH stimulates extracellular signal-regulated kinase (ERK) phosphorylation, and the loss of ERK in the PG phenocopies the loss of PTTH and Torso. We conclude that PTTH initiates metamorphosis by activation of the Torso/ERK pathway.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rewitz, Kim F -- Yamanaka, Naoki -- Gilbert, Lawrence I -- O'Connor, Michael B -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2009 Dec 4;326(5958):1403-5. doi: 10.1126/science.1176450.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Genetics, Cell Biology, and Development, University of Minnesota, Minneapolis, MN 55455, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19965758" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Bombyx/*genetics/metabolism ; Cell Line ; Drosophila Proteins/chemistry/genetics/*metabolism ; Drosophila melanogaster/embryology/genetics/*growth & development/metabolism ; Embryo, Nonmammalian/metabolism ; Extracellular Signal-Regulated MAP Kinases/metabolism ; Insect Hormones/chemistry/*metabolism ; Larva/growth & development ; Ligands ; *Metamorphosis, Biological ; Molecular Sequence Data ; Neurons/metabolism ; Phosphorylation ; Pupa/growth & development ; RNA Interference ; Receptor Protein-Tyrosine Kinases/genetics/*metabolism ; Signal Transduction
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  • 13
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    Mechanically activated integrin switch controls alpha5beta1 function (2009)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2009-01-31
    Description: The cytoskeleton, integrin-mediated adhesion, and substrate stiffness control a common set of cell functions required for development and homeostasis that are often deranged in cancer. The connection between these mechanical elements and chemical signaling processes is not known. Here, we show that alpha(5)beta(1) integrin switches between relaxed and tensioned states in response to myosin II-generated cytoskeletal force. Force combines with extracellular matrix stiffness to generate tension that triggers the integrin switch. This switch directly controls the alpha(5)beta(1)-fibronectin bond strength through engaging the synergy site in fibronectin and is required to generate signals through phosphorylation of focal adhesion kinase. In the context of tissues, this integrin switch connects cytoskeleton and extracellular matrix mechanics to adhesion-dependent motility and signaling pathways.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Friedland, Julie C -- Lee, Mark H -- Boettiger, David -- GM57388/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2009 Jan 30;323(5914):642-4. doi: 10.1126/science.1168441.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Medicine and Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19179533" target="_blank"〉PubMed〈/a〉
    Keywords: Actins ; Biophysical Phenomena ; Cell Adhesion ; Cell Line, Tumor ; Cytoskeleton/*physiology ; Fibronectins/chemistry/*metabolism ; Focal Adhesion Protein-Tyrosine Kinases/metabolism ; Humans ; Integrin alpha5beta1/*chemistry/*metabolism ; Ligands ; Models, Molecular ; Myosin Type II/antagonists & inhibitors/metabolism ; Phosphorylation ; Protein Binding ; Protein Conformation ; Signal Transduction
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  • 14
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    KLF family members regulate intrinsic axon regeneration ability (2009)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2009-10-10
    Description: Neurons in the central nervous system (CNS) lose their ability to regenerate early in development, but the underlying mechanisms are unknown. By screening genes developmentally regulated in retinal ganglion cells (RGCs), we identified Kruppel-like factor-4 (KLF4) as a transcriptional repressor of axon growth in RGCs and other CNS neurons. RGCs lacking KLF4 showed increased axon growth both in vitro and after optic nerve injury in vivo. Related KLF family members suppressed or enhanced axon growth to differing extents, and several growth-suppressive KLFs were up-regulated postnatally, whereas growth-enhancing KLFs were down-regulated. Thus, coordinated activities of different KLFs regulate the regenerative capacity of CNS neurons.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2882032/" 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/PMC2882032/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Moore, Darcie L -- Blackmore, Murray G -- Hu, Ying -- Kaestner, Klaus H -- Bixby, John L -- Lemmon, Vance P -- Goldberg, Jeffrey L -- P30 EY014801/EY/NEI NIH HHS/ -- R01 NS059866/NS/NINDS NIH HHS/ -- R01 NS059866-01A2/NS/NINDS NIH HHS/ -- R01 NS061348/NS/NINDS NIH HHS/ -- R01 NS061348-01A2/NS/NINDS NIH HHS/ -- R01 NS061348-02/NS/NINDS NIH HHS/ -- R01 NS061348-03/NS/NINDS NIH HHS/ -- R01 NS061348-04/NS/NINDS NIH HHS/ -- R03 EY016790/EY/NEI NIH HHS/ -- R03 EY016790-01/EY/NEI NIH HHS/ -- R03 EY016790-02/EY/NEI NIH HHS/ -- R03 EY016790-03/EY/NEI NIH HHS/ -- T32 NS007459/NS/NINDS NIH HHS/ -- T32 NS07492/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2009 Oct 9;326(5950):298-301. doi: 10.1126/science.1175737.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL 33136, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19815778" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Axons/*physiology/ultrastructure ; Cell Count ; Cell Survival ; Cells, Cultured ; Down-Regulation ; Gene Knockout Techniques ; Growth Cones/physiology ; Hippocampus/cytology/physiology ; Kruppel-Like Transcription Factors/genetics/*physiology ; Mice ; Nerve Crush ; Nerve Regeneration ; Neurites/physiology ; Neurons/*physiology ; Optic Nerve Injuries/physiopathology ; Rats ; Retinal Ganglion Cells/cytology/*physiology ; Transcription, Genetic ; Transfection ; Up-Regulation
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  • 15
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    Sensing chromosome bi-orientation by spatial separation of aurora B kinase from kinetochore substrates (2009)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2009-01-20
    Description: Successful cell division requires that chromosomes attach to opposite poles of the mitotic spindle (bi-orientation). Aurora B kinase regulates chromosome-spindle attachments by phosphorylating kinetochore substrates that bind microtubules. Centromere tension stabilizes bi-oriented attachments, but how physical forces are translated into signaling at individual centromeres is unknown. Using fluorescence resonance energy transfer-based biosensors to measure localized phosphorylation dynamics in living cells, we found that phosphorylation of an Aurora B substrate at the kinetochore depended on its distance from the kinase at the inner centromere. Furthermore, repositioning Aurora B closer to the kinetochore prevented stabilization of bi-oriented attachments and activated the spindle checkpoint. Thus, centromere tension can be sensed by increased spatial separation of Aurora B from kinetochore substrates, which reduces phosphorylation and stabilizes kinetochore microtubules.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2713345/" 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/PMC2713345/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Liu, Dan -- Vader, Gerben -- Vromans, Martijn J M -- Lampson, Michael A -- Lens, Susanne M A -- GM083988/GM/NIGMS NIH HHS/ -- R01 GM083988/GM/NIGMS NIH HHS/ -- R01 GM083988-01/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2009 Mar 6;323(5919):1350-3. doi: 10.1126/science.1167000. Epub 2009 Jan 15.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, University of Pennsylvania, Philadelphia, PA 19104, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19150808" target="_blank"〉PubMed〈/a〉
    Keywords: Aurora Kinase B ; Aurora Kinases ; Autoantigens/metabolism ; Biosensing Techniques ; Cell Line, Tumor ; Centromere/enzymology/*metabolism ; Chromatids/metabolism ; Chromosomal Proteins, Non-Histone/metabolism ; Chromosomes, Human/*metabolism ; Fluorescence Resonance Energy Transfer ; HeLa Cells ; Humans ; Kinetochores/*metabolism ; Microtubules/*metabolism ; Mitosis ; Models, Biological ; Phosphorylation ; Protein-Serine-Threonine Kinases/*metabolism ; Recombinant Fusion Proteins/metabolism ; Spindle Apparatus/*metabolism
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  • 16
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    Positive selection of tyrosine loss in metazoan evolution (2009)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2009-07-11
    Description: John Nash showed that within a complex system, individuals are best off if they make the best decision that they can, taking into account the decisions of the other individuals. Here, we investigate whether similar principles influence the evolution of signaling networks in multicellular animals. Specifically, by analyzing a set of metazoan species we observed a striking negative correlation of genomically encoded tyrosine content with biological complexity (as measured by the number of cell types in each organism). We discuss how this observed tyrosine loss correlates with the expansion of tyrosine kinases in the evolution of the metazoan lineage and how it may relate to the optimization of signaling systems in multicellular animals. We propose that this phenomenon illustrates genome-wide adaptive evolution to accommodate beneficial genetic perturbation.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3066034/" 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/PMC3066034/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tan, Chris Soon Heng -- Pasculescu, Adrian -- Lim, Wendell A -- Pawson, Tony -- Bader, Gary D -- Linding, Rune -- R01 GM055040/GM/NIGMS NIH HHS/ -- R01 GM055040-11/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2009 Sep 25;325(5948):1686-8. doi: 10.1126/science.1174301. Epub 2009 Jul 9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Samuel Lunenfeld Research Institute, Mount Sinai Hospital, Toronto M5G 1X5, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19589966" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptation, Physiological ; Animals ; *Biological Evolution ; *Evolution, Molecular ; Fungal Proteins/chemistry/metabolism ; Glycosylation ; Humans ; Methylation ; Mutation ; Phosphorylation ; Phosphotyrosine/metabolism ; Protein Structure, Tertiary ; Protein-Tyrosine Kinases/*metabolism ; Proteins/*chemistry/*metabolism ; *Selection, Genetic ; *Signal Transduction ; Substrate Specificity ; Tyrosine/*metabolism
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  • 17
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    Analysis of Drosophila segmentation network identifies a JNK pathway factor overexpressed in kidney cancer (2009)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2009-01-24
    Description: We constructed a large-scale functional network model in Drosophila melanogaster built around two key transcription factors involved in the process of embryonic segmentation. Analysis of the model allowed the identification of a new role for the ubiquitin E3 ligase complex factor SPOP. In Drosophila, the gene encoding SPOP is a target of segmentation transcription factors. Drosophila SPOP mediates degradation of the Jun kinase phosphatase Puckered, thereby inducing tumor necrosis factor (TNF)/Eiger-dependent apoptosis. In humans, we found that SPOP plays a conserved role in TNF-mediated JNK signaling and was highly expressed in 99% of clear cell renal cell carcinomas (RCCs), the most prevalent form of kidney cancer. SPOP expression distinguished histological subtypes of RCC and facilitated identification of clear cell RCC as the primary tumor for metastatic lesions.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2756524/" 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/PMC2756524/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Liu, Jiang -- Ghanim, Murad -- Xue, Lei -- Brown, Christopher D -- Iossifov, Ivan -- Angeletti, Cesar -- Hua, Sujun -- Negre, Nicolas -- Ludwig, Michael -- Stricker, Thomas -- Al-Ahmadie, Hikmat A -- Tretiakova, Maria -- Camp, Robert L -- Perera-Alberto, Montse -- Rimm, David L -- Xu, Tian -- Rzhetsky, Andrey -- White, Kevin P -- P50 GM081892/GM/NIGMS NIH HHS/ -- P50 GM081892-01A1/GM/NIGMS NIH HHS/ -- R01 HG003012/HG/NHGRI NIH HHS/ -- R01 HG003012-04/HG/NHGRI NIH HHS/ -- UL1 RR024999/RR/NCRR NIH HHS/ -- UL1 RR024999-02/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 2009 Feb 27;323(5918):1218-22. doi: 10.1126/science.1157669. Epub 2009 Jan 22.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Genomics and Systems Biology, University of Chicago and Argonne National Laboratory, Chicago, IL 60637, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19164706" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Apoptosis ; Carcinoma, Renal Cell/*genetics/metabolism ; Cell Line ; Compound Eye, Arthropod/embryology/metabolism ; Drosophila Proteins/genetics/metabolism ; Drosophila melanogaster/embryology/*genetics/metabolism ; Embryo, Nonmammalian/metabolism ; Fushi Tarazu Transcription Factors/genetics/metabolism ; Gene Expression Profiling ; Gene Regulatory Networks ; Homeodomain Proteins/genetics/metabolism ; Humans ; Janus Kinases/*metabolism ; Kidney/metabolism ; Kidney Neoplasms/*genetics/metabolism ; Molecular Sequence Data ; Nervous System/embryology ; Nuclear Proteins/*genetics/metabolism ; Phosphoprotein Phosphatases/metabolism ; Phosphorylation ; Repressor Proteins/*genetics/metabolism ; *Signal Transduction ; Transcription Factors/genetics/metabolism ; Transcription, Genetic
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  • 18
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    Calcineurin/NFAT signaling is required for neuregulin-regulated Schwann cell differentiation (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-01-31
    Description: Schwann cells develop from multipotent neural crest cells and form myelin sheaths around axons that allow rapid transmission of action potentials. Neuregulin signaling through the ErbB receptor regulates Schwann cell development; however, the downstream pathways are not fully defined. We find that mice lacking calcineurin B1 in the neural crest have defects in Schwann cell differentiation and myelination. Neuregulin addition to Schwann cell precursors initiates an increase in cytoplasmic Ca2+, which activates calcineurin and the downstream transcription factors NFATc3 and c4. Purification of NFAT protein complexes shows that Sox10 is an NFAT nuclear partner and synergizes with NFATc4 to activate Krox20, which regulates genes necessary for myelination. Our studies demonstrate that calcineurin and NFAT are essential for neuregulin and ErbB signaling, neural crest diversification, and differentiation of Schwann cells.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2790385/" 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/PMC2790385/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kao, Shih-Chu -- Wu, Hai -- Xie, Jianming -- Chang, Ching-Pin -- Ranish, Jeffrey A -- Graef, Isabella A -- Crabtree, Gerald R -- AI60037/AI/NIAID NIH HHS/ -- HD55391/HD/NICHD NIH HHS/ -- NS046789/NS/NINDS NIH HHS/ -- R01 AI060037/AI/NIAID NIH HHS/ -- R01 AI060037-01/AI/NIAID NIH HHS/ -- R01 AI060037-02/AI/NIAID NIH HHS/ -- R01 AI060037-03/AI/NIAID NIH HHS/ -- R01 AI060037-04/AI/NIAID NIH HHS/ -- R01 AI060037-05/AI/NIAID NIH HHS/ -- R01 HD055391/HD/NICHD NIH HHS/ -- R01 NS046789/NS/NINDS NIH HHS/ -- R01 NS046789-01/NS/NINDS NIH HHS/ -- R01 NS046789-02/NS/NINDS NIH HHS/ -- R01 NS046789-03/NS/NINDS NIH HHS/ -- R01 NS046789-04/NS/NINDS NIH HHS/ -- R01 NS046789-05/NS/NINDS NIH HHS/ -- R21 NS061702/NS/NINDS NIH HHS/ -- R21 NS061702-01/NS/NINDS NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2009 Jan 30;323(5914):651-4. doi: 10.1126/science.1166562.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Stanford University, Stanford, CA 94305, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19179536" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Calcineurin/*metabolism ; Calcium/metabolism ; Cell Differentiation ; Cell Line ; Coculture Techniques ; Early Growth Response Protein 2/metabolism ; Ganglia, Spinal/cytology ; Mice ; Myelin Sheath/physiology ; NFATC Transcription Factors/*metabolism ; Neural Crest/cytology/metabolism ; Neuregulins/*metabolism ; Phosphorylation ; Receptor, ErbB-2/metabolism ; Receptor, ErbB-3 ; SOXE Transcription Factors/metabolism ; Schwann Cells/*cytology/*metabolism ; *Signal Transduction
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    Cell biology. Evolving cell signals (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-09-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Collins, Mark O -- New York, N.Y. -- Science. 2009 Sep 25;325(5948):1635-6. doi: 10.1126/science.1180331.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Proteomic Mass Spectrometry Group, Wellcome Trust Sanger Institute, Hinxton, Cambridge CB10 1SA, UK. moc@sanger.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19779182" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Binding Sites ; *Biological Evolution ; CDC2 Protein Kinase/antagonists & inhibitors/metabolism ; *Evolution, Molecular ; Fungi/metabolism ; Phosphorylation ; Protein Binding ; Protein Folding ; Protein Structure, Tertiary ; Protein-Serine-Threonine Kinases/metabolism ; Protein-Tyrosine Kinases/metabolism ; Proteins/*chemistry/*metabolism ; Serine/metabolism ; *Signal Transduction ; Threonine/metabolism ; Tyrosine/metabolism
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 20
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    Dopamine controls persistence of long-term memory storage (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-08-22
    Description: The paradigmatic feature of long-term memory (LTM) is its persistence. However, little is known about the mechanisms that make some LTMs last longer than others. In rats, a long-lasting fear LTM vanished rapidly when the D1 dopamine receptor antagonist SCH23390 was injected into the dorsal hippocampus 12 hours, but not immediately or 9 hours, after the fearful experience. Conversely, intrahippocampal application of the D1 agonist SK38393 at the same critical post-training time converted a rapidly decaying fear LTM into a persistent one. This effect was mediated by brain-derived neurotrophic factor and regulated by the ventral tegmental area (VTA). Thus, the persistence of LTM depends on activation of VTA/hippocampus dopaminergic connections and can be specifically modulated by manipulating this system at definite post-learning time points.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rossato, Janine I -- Bevilaqua, Lia R M -- Izquierdo, Ivan -- Medina, Jorge H -- Cammarota, Martin -- New York, N.Y. -- Science. 2009 Aug 21;325(5943):1017-20. doi: 10.1126/science.1172545.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Centro de Memoria, Instituto do Cerebro, Pontificia Universidade Catolica do Rio Grande do Sul, Porto Alegre, Brazil.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19696353" target="_blank"〉PubMed〈/a〉
    Keywords: 2,3,4,5-Tetrahydro-7,8-dihydroxy-1-phenyl-1H-3-benzazepine/pharmacology ; 8-Bromo Cyclic Adenosine Monophosphate/pharmacology ; Animals ; Benzazepines/pharmacology ; Brain-Derived Neurotrophic Factor/metabolism ; Dopamine/*physiology ; Dopamine Agonists/pharmacology ; Dopamine Antagonists/pharmacology ; Fear ; Hippocampus/drug effects/*physiology ; Male ; Memory/drug effects/*physiology ; Phosphorylation ; Rats ; Rats, Wistar ; Receptors, Dopamine D1/agonists/antagonists & inhibitors/metabolism ; Receptors, N-Methyl-D-Aspartate/metabolism ; Time Factors ; Tyrosine 3-Monooxygenase ; Ventral Tegmental Area/*physiology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 21
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    Input-specific spine entry of soma-derived Vesl-1S protein conforms to synaptic tagging (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-05-16
    Description: Late-phase synaptic plasticity depends on the synthesis of new proteins that must function only in the activated synapses. The synaptic tag hypothesis requires input-specific functioning of these proteins after undirected transport. Confirmation of this hypothesis requires specification of a biochemical tagging activity and an example protein that behaves as the hypothesis predicts. We found that in rat neurons, soma-derived Vesl-1S (Homer-1a) protein, a late-phase plasticity-related synaptic protein, prevailed in every dendrite and did not enter spines. N-methyl-d-aspartate receptor activation triggered input-specific spine entry of Vesl-1S proteins, which met many criteria for synaptic tagging. These results suggest that Vesl-1S supports the hypothesis and that the activity-dependent regulation of spine entry functions as a synaptic tag.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Okada, Daisuke -- Ozawa, Fumiko -- Inokuchi, Kaoru -- New York, N.Y. -- Science. 2009 May 15;324(5929):904-9. doi: 10.1126/science.1171498.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Mitsubishi Kagaku Institute of Life Sciences (MITILS), 11 Minamiooya, Machida, Tokyo 194-8511, Japan. dada@mitils.jp〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19443779" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Calcium/metabolism ; Carrier Proteins/genetics/*metabolism ; Cells, Cultured ; Dendrites/*metabolism ; Dendritic Spines/*metabolism/ultrastructure ; Hippocampus/cytology/metabolism ; Mice ; *Neuronal Plasticity ; Plasmids ; Protein Transport ; Rats ; Rats, Wistar ; Receptors, N-Methyl-D-Aspartate/metabolism ; Recombinant Fusion Proteins/metabolism ; Signal Transduction ; Synapses/*metabolism ; Synaptic Transmission ; Transfection
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  • 22
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    Cell biology. Hypoxic hookup (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-06-06
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Guarente, Leonard -- New York, N.Y. -- Science. 2009 Jun 5;324(5932):1281-2. doi: 10.1126/science.1175679.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Paul F. Glenn Lab and Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. leng@mit.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19498158" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylation ; Aging ; Animals ; Basic Helix-Loop-Helix Transcription Factors/*metabolism ; *Cell Hypoxia ; Cells, Cultured ; Erythropoietin/biosynthesis/genetics ; Gene Expression ; Gene Expression Regulation ; Humans ; Hypoxia-Inducible Factor 1, alpha Subunit/metabolism ; Liver/embryology/metabolism ; Mice ; NAD/metabolism ; Neoplasms/metabolism/pathology ; Oxidation-Reduction ; Sirtuin 1 ; Sirtuins/genetics/*metabolism
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 23
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    Cell biology. Using taste to clear the air(ways) (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-08-29
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kinnamon, Sue C -- Reynolds, Susan D -- New York, N.Y. -- Science. 2009 Aug 28;325(5944):1081-2. doi: 10.1126/science.1179180.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Otolaryngology and Rocky Mountain Taste and Smell Center, University of Colorado Denver, 12700 East 19th Avenue, Aurora, CO 80045, USA. sue.kinnamon@ucdenver.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19713515" target="_blank"〉PubMed〈/a〉
    Keywords: Calcium/metabolism ; Cells, Cultured ; Cilia/*physiology ; Epithelial Cells/*metabolism ; Humans ; Movement ; Mucus/secretion ; Noxae ; Receptors, G-Protein-Coupled/*metabolism ; Respiratory Mucosa/cytology/*metabolism ; *Signal Transduction ; *Taste ; Transducin/metabolism ; Type C Phospholipases/metabolism
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 24
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    Generation of functional ventricular heart muscle from mouse ventricular progenitor cells (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-10-17
    Description: The mammalian heart is formed from distinct sets of first and second heart field (FHF and SHF, respectively) progenitors. Although multipotent progenitors have previously been shown to give rise to cardiomyocytes, smooth muscle, and endothelial cells, the mechanism governing the generation of large numbers of differentiated progeny remains poorly understood. We have employed a two-colored fluorescent reporter system to isolate FHF and SHF progenitors from developing mouse embryos and embryonic stem cells. Genome-wide profiling of coding and noncoding transcripts revealed distinct molecular signatures of these progenitor populations. We further identify a committed ventricular progenitor cell in the Islet 1 lineage that is capable of limited in vitro expansion, differentiation, and assembly into functional ventricular muscle tissue, representing a combination of tissue engineering and stem cell biology.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2895998/" 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/PMC2895998/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Domian, Ibrahim J -- Chiravuri, Murali -- van der Meer, Peter -- Feinberg, Adam W -- Shi, Xi -- Shao, Ying -- Wu, Sean M -- Parker, Kevin Kit -- Chien, Kenneth R -- K08 HL081086/HL/NHLBI NIH HHS/ -- K08 HL081086-01/HL/NHLBI NIH HHS/ -- K08 HL091209/HL/NHLBI NIH HHS/ -- R01 HL079126/HL/NHLBI NIH HHS/ -- R01 HL079126-01A1/HL/NHLBI NIH HHS/ -- T32 HL002807/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 2009 Oct 16;326(5951):426-9. doi: 10.1126/science.1177350.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cardiovascular Research Center, Massachusetts General Hospital, Charles River Plaza, CPZN 3200, 185 Cambridge Street, Boston, MA 02114-2790, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19833966" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Animals ; Cell Cycle ; Cell Differentiation ; Cell Line ; Cell Lineage ; Cells, Cultured ; Embryonic Stem Cells/*cytology/physiology ; Gene Expression ; Heart/embryology ; Heart Ventricles/*cytology/embryology ; Mice ; Mice, Transgenic ; Muscle Development ; Myocardial Contraction ; Myocytes, Cardiac/*cytology/physiology ; Oligonucleotide Array Sequence Analysis ; *Tissue Engineering ; *Ventricular Function
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  • 25
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    Complexin controls the force transfer from SNARE complexes to membranes in fusion (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-01-24
    Description: Trans-SNAP receptor (SNARE, where SNAP is defined as soluble NSF attachment protein, and NSF is defined as N-ethylmaleimide-sensitive factor) complexes catalyze synaptic vesicle fusion and bind complexin, but the function of complexin binding to SNARE complexes remains unclear. Here we show that in neuronal synapses, complexin simultaneously suppressed spontaneous fusion and activated fast calcium ion-evoked fusion. The dual function of complexin required SNARE binding and also involved distinct amino-terminal sequences of complexin that localize to the point where trans-SNARE complexes insert into the fusing membranes, suggesting that complexin controls the force that trans-SNARE complexes apply onto the fusing membranes. Consistent with this hypothesis, a mutation in the membrane insertion sequence of the v-SNARE synaptobrevin/vesicle-associated membrane protein (VAMP) phenocopied the complexin loss-of-function state without impairing complexin binding to SNARE complexes. Thus, complexin probably activates and clamps the force transfer from assembled trans-SNARE complexes onto fusing membranes.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3235366/" 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/PMC3235366/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Maximov, Anton -- Tang, Jiong -- Yang, Xiaofei -- Pang, Zhiping P -- Sudhof, Thomas C -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2009 Jan 23;323(5913):516-21. doi: 10.1126/science.1166505.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neuroscience, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19164751" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Adaptor Proteins, Vesicular Transport ; Amino Acid Sequence ; Animals ; Calcium/metabolism ; Cells, Cultured ; Excitatory Postsynaptic Potentials ; *Membrane Fusion ; Mice ; Mice, Knockout ; Mutant Proteins/metabolism ; Nerve Tissue Proteins/chemistry/genetics/*metabolism ; Neurons/*physiology ; Protein Binding ; R-SNARE Proteins/genetics/metabolism ; SNARE Proteins/chemistry/*metabolism ; Synapses/*physiology ; Synaptic Vesicles/physiology ; Synaptotagmins/metabolism
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    PAN1: a receptor-like protein that promotes polarization of an asymmetric cell division in maize (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-01-31
    Description: Polarization of cell division is essential for eukaryotic development, but little is known about how this is accomplished in plants. The formation of stomatal complexes in maize involves the polarization of asymmetric subsidiary mother cell (SMC) divisions toward the adjacent guard mother cell (GMC), apparently under the influence of a GMC-derived signal. We found that the maize pan1 gene promotes the premitotic polarization of SMCs and encodes a leucine-rich repeat receptor-like protein that becomes localized in SMCs at sites of GMC contact. PAN1 has an inactive kinase domain but is required for the accumulation of a membrane-associated phosphoprotein, suggesting a function for PAN1 in signal transduction. Our findings implicate PAN1 in the transmission of an extrinsic signal that polarizes asymmetric SMC divisions toward GMCs.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cartwright, Heather N -- Humphries, John A -- Smith, Laurie G -- New York, N.Y. -- Science. 2009 Jan 30;323(5914):649-51. doi: 10.1126/science.1161686.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Section of Cell and Developmental Biology, University of California San Diego, 9500 Gilman Drive, San Diego, CA 92093-0116, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19179535" target="_blank"〉PubMed〈/a〉
    Keywords: Actins/metabolism ; Amino Acid Sequence ; Cell Division ; Cell Nucleus/ultrastructure ; Cell Polarity ; Cues ; Genes, Plant ; Molecular Sequence Data ; Phosphorylation ; Plant Leaves/*cytology ; Plant Proteins/chemistry/genetics/*metabolism ; Plant Stomata/*cytology/genetics/growth & development/metabolism ; Protein Structure, Tertiary ; Signal Transduction ; Zea mays/*cytology/genetics/growth & development/metabolism
    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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  • 27
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    Synapse- and stimulus-specific local translation during long-term neuronal plasticity (2009)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2009-05-16
    Description: Long-term memory and synaptic plasticity require changes in gene expression and yet can occur in a synapse-specific manner. Messenger RNA localization and regulated translation at synapses are thus critical for establishing synapse specificity. Using live-cell microscopy of photoconvertible fluorescent protein translational reporters, we directly visualized local translation at synapses during long-term facilitation of Aplysia sensory-motor synapses. Translation of the reporter required multiple applications of serotonin, was spatially restricted to stimulated synapses, was transcript- and stimulus-specific, and occurred during long-term facilitation but not during long-term depression of sensory-motor synapses. Translational regulation only occurred in the presence of a chemical synapse and required calcium signaling in the postsynaptic motor neuron. Thus, highly regulated local translation occurs at synapses during long-term plasticity and requires trans-synaptic signals.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2821090/" 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/PMC2821090/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wang, Dan Ohtan -- Kim, Sang Mok -- Zhao, Yali -- Hwang, Hongik -- Miura, Satoru K -- Sossin, Wayne S -- Martin, Kelsey C -- 15121/Canadian Institutes of Health Research/Canada -- NS045324/NS/NINDS NIH HHS/ -- R01 NS045324/NS/NINDS NIH HHS/ -- R01 NS045324-08A2/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2009 Jun 19;324(5934):1536-40. doi: 10.1126/science.1173205. Epub 2009 May 14.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Psychiatry and Biobehavioral Sciences, University of California-Los Angeles (UCLA), BSRB 390B, 615 Charles E. Young Drive South, Los Angeles, CA 90095-1737, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19443737" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aplysia ; Biological Transport ; Calcium/physiology ; Cells, Cultured ; FMRFamide/physiology ; Gene Expression Regulation ; Genes, Reporter ; Luminescent Proteins/genetics ; Motor Neurons/physiology ; Neuronal Plasticity/genetics/*physiology ; Neuropeptides/genetics ; Neurotransmitter Agents/genetics ; *Protein Biosynthesis ; RNA, Messenger/metabolism ; Sensory Receptor Cells/physiology ; Serotonin/physiology ; Synapses/genetics/*physiology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 28
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    Dependence of mouse embryonic stem cells on threonine catabolism (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-07-11
    Description: Measurements of the abundance of common metabolites in cultured embryonic stem (ES) cells revealed an unusual state with respect to one-carbon metabolism. These findings led to the discovery of copious expression of the gene encoding threonine dehydrogenase (TDH) in ES cells. TDH-mediated catabolism of threonine takes place in mitochondria to generate glycine and acetyl-coenzyme A (CoA), with glycine facilitating one-carbon metabolism via the glycine cleavage system and acetyl-CoA feeding the tricarboxylic acid cycle. Culture media individually deprived of each of the 20 amino acids were applied to ES cells, leading to the discovery that ES cells are critically dependent on one amino acid--threonine. These observations show that ES cells exist in a high-flux backbone metabolic state comparable to that of rapidly growing bacterial cells.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4373593/" 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/PMC4373593/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wang, Jian -- Alexander, Peter -- Wu, Leeju -- Hammer, Robert -- Cleaver, Ondine -- McKnight, Steven L -- R01 DK079862/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 2009 Jul 24;325(5939):435-9. doi: 10.1126/science.1173288. Epub 2009 Jul 9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390-9152, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19589965" target="_blank"〉PubMed〈/a〉
    Keywords: Alcohol Oxidoreductases/genetics/metabolism ; Animals ; Cells, Cultured ; Culture Media ; Embryo, Mammalian/metabolism ; Embryonic Development ; Embryonic Stem Cells/*metabolism ; HeLa Cells ; Humans ; Mice ; NIH 3T3 Cells ; Threonine/*metabolism ; Tissue Culture Techniques
    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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    PTPsigma is a receptor for chondroitin sulfate proteoglycan, an inhibitor of neural regeneration (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-10-17
    Description: Chondroitin sulfate proteoglycans (CSPGs) present a barrier to axon regeneration. However, no specific receptor for the inhibitory effect of CSPGs has been identified. We showed that a transmembrane protein tyrosine phosphatase, PTPsigma, binds with high affinity to neural CSPGs. Binding involves the chondroitin sulfate chains and a specific site on the first immunoglobulin-like domain of PTPsigma. In culture, PTPsigma(-/-) neurons show reduced inhibition by CSPG. A PTPsigma fusion protein probe can detect cognate ligands that are up-regulated specifically at neural lesion sites. After spinal cord injury, PTPsigma gene disruption enhanced the ability of axons to penetrate regions containing CSPG. These results indicate that PTPsigma can act as a receptor for CSPGs and may provide new therapeutic approaches to neural regeneration.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2811318/" 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/PMC2811318/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shen, Yingjie -- Tenney, Alan P -- Busch, Sarah A -- Horn, Kevin P -- Cuascut, Fernando X -- Liu, Kai -- He, Zhigang -- Silver, Jerry -- Flanagan, John G -- R01 EY011559/EY/NEI NIH HHS/ -- R01 NS025713/NS/NINDS NIH HHS/ -- R37 HD029417/HD/NICHD NIH HHS/ -- R37 NS025713/NS/NINDS NIH HHS/ -- R37 NS025713-22/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2009 Oct 23;326(5952):592-6. doi: 10.1126/science.1178310. Epub 2009 Oct 15.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell Biology and Program in Neuroscience, Harvard Medical School, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19833921" target="_blank"〉PubMed〈/a〉
    Keywords: Aggrecans/metabolism ; Animals ; Astrocytes/metabolism ; Axons/physiology ; Binding Sites ; Cells, Cultured ; Chondroitin Sulfate Proteoglycans/chemistry/*metabolism ; Chondroitin Sulfates/metabolism ; Female ; Ganglia, Spinal/cytology/metabolism ; Ligands ; Mice ; *Nerve Regeneration ; Nerve Tissue Proteins/chemistry/*metabolism ; Neurites/physiology ; Neurons/*physiology ; Protein Binding ; Protein Interaction Domains and Motifs ; Proteoglycans/chemistry/*metabolism ; Receptor-Like Protein Tyrosine Phosphatases, Class ; 2/chemistry/genetics/*metabolism ; Recombinant Fusion Proteins/chemistry/metabolism ; Spinal Cord/metabolism/pathology ; Spinal Cord Injuries/*metabolism/pathology/physiopathology
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    MafB/c-Maf deficiency enables self-renewal of differentiated functional macrophages (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-11-07
    Description: In metazoan organisms, terminal differentiation is generally tightly linked to cell cycle exit, whereas the undifferentiated state of pluripotent stem cells is associated with unlimited self-renewal. Here, we report that combined deficiency for the transcription factors MafB and c-Maf enables extended expansion of mature monocytes and macrophages in culture without loss of differentiated phenotype and function. Upon transplantation, the expanded cells are nontumorigenic and contribute to functional macrophage populations in vivo. Small hairpin RNA inactivation shows that continuous proliferation of MafB/c-Maf deficient macrophages requires concomitant up-regulation of two pluripotent stem cell-inducing factors, KLF4 and c-Myc. Our results indicate that MafB/c-MafB deficiency renders self-renewal compatible with terminal differentiation. It thus appears possible to amplify functional differentiated cells without malignant transformation or stem cell intermediates.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Aziz, Athar -- Soucie, Erinn -- Sarrazin, Sandrine -- Sieweke, Michael H -- New York, N.Y. -- Science. 2009 Nov 6;326(5954):867-71. doi: 10.1126/science.1176056.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Centre d'Immunologie de Marseille-Luminy (CIML), Universite Aix-Marseille, Campus de Luminy, Case 906, 13288 Marseille Cedex 09, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19892988" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Differentiation ; *Cell Proliferation ; Cell Transformation, Neoplastic ; Cells, Cultured ; Kruppel-Like Transcription Factors/genetics/physiology ; Macrophage Colony-Stimulating Factor/metabolism/pharmacology ; Macrophages/cytology/*physiology/transplantation ; MafB Transcription Factor/*deficiency/genetics/physiology ; Mice ; Mice, Knockout ; Monocytes/cytology/physiology ; Myeloid Progenitor Cells/cytology/physiology ; Phagocytosis ; Proto-Oncogene Proteins c-maf/*deficiency/genetics/physiology ; Proto-Oncogene Proteins c-myc/genetics/physiology ; Up-Regulation
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    CD4+ regulatory T cells control TH17 responses in a Stat3-dependent manner (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-10-03
    Description: Distinct classes of protective immunity are guided by activation of STAT transcription factor family members in response to environmental cues. CD4+ regulatory T cells (T(regs)) suppress excessive immune responses, and their deficiency results in a lethal, multi-organ autoimmune syndrome characterized by T helper 1 (TH1) and T helper 2 (TH2) CD4+ T cell-dominated lesions. Here we show that pathogenic TH17 responses in mice are also restrained by T(regs). This suppression was lost upon T(reg)-specific ablation of Stat3, a transcription factor critical for TH17 differentiation, and resulted in the development of a fatal intestinal inflammation. These findings suggest that T(regs) adapt to their environment by engaging distinct effector response-specific suppression modalities upon activation of STAT proteins that direct the corresponding class of the immune response.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4408196/" 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/PMC4408196/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chaudhry, Ashutosh -- Rudra, Dipayan -- Treuting, Piper -- Samstein, Robert M -- Liang, Yuqiong -- Kas, Arnold -- Rudensky, Alexander Y -- AI-034206/AI/NIAID NIH HHS/ -- AI-061816/AI/NIAID NIH HHS/ -- R01 AI034206/AI/NIAID NIH HHS/ -- R01 AI061816/AI/NIAID NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2009 Nov 13;326(5955):986-91. doi: 10.1126/science.1172702. Epub 2009 Oct 1.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute and Immunology Program, Memorial Sloan-Kettering Cancer Center, New York, NY 10065, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19797626" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Lineage ; Cytokines/metabolism ; Female ; Forkhead Transcription Factors/genetics/metabolism ; Inflammatory Bowel Diseases/*immunology/metabolism/pathology ; Interferon-gamma/metabolism ; Interleukin-17/metabolism ; Intestine, Large/immunology/pathology ; Lymph Nodes/immunology/pathology ; Lymphocyte Activation ; Male ; Mice ; Mice, Inbred C57BL ; Phosphorylation ; Receptors, CCR6/genetics/metabolism ; STAT3 Transcription Factor/genetics/*metabolism ; Spleen/immunology/pathology ; T-Lymphocyte Subsets/*immunology ; T-Lymphocytes, Helper-Inducer/*immunology ; T-Lymphocytes, Regulatory/*immunology/metabolism
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    MAPK3/1 (ERK1/2) in ovarian granulosa cells are essential for female fertility (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-05-16
    Description: A surge of luteinizing hormone (LH) from the pituitary gland triggers ovulation, oocyte maturation, and luteinization for successful reproduction in mammals. Because the signaling molecules RAS and ERK1/2 (extracellular signal-regulated kinases 1 and 2) are activated by an LH surge in granulosa cells of preovulatory follicles, we disrupted Erk1/2 in mouse granulosa cells and provide in vivo evidence that these kinases are necessary for LH-induced oocyte resumption of meiosis, ovulation, and luteinization. In addition, biochemical analyses and selected disruption of the Cebpb gene in granulosa cells demonstrate that C/EBPbeta (CCAAT/Enhancer-binding protein-beta) is a critical downstream mediator of ERK1/2 activation. Thus, ERK1/2 and C/EBPbeta constitute an in vivo LH-regulated signaling pathway that controls ovulation- and luteinization-related events.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2847890/" 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/PMC2847890/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fan, Heng-Yu -- Liu, Zhilin -- Shimada, Masayuki -- Sterneck, Esta -- Johnson, Peter F -- Hedrick, Stephen M -- Richards, Joanne S -- HD07165/HD/NICHD NIH HHS/ -- HD07495/HD/NICHD NIH HHS/ -- HD16229/HD/NICHD NIH HHS/ -- R01 AI021372/AI/NIAID NIH HHS/ -- R01 AI021372-26/AI/NIAID NIH HHS/ -- R01 HD016229/HD/NICHD NIH HHS/ -- R01 HD016229-27A2/HD/NICHD NIH HHS/ -- U54 HD007495/HD/NICHD NIH HHS/ -- U54 HD007495-366896/HD/NICHD NIH HHS/ -- Intramural NIH HHS/ -- New York, N.Y. -- Science. 2009 May 15;324(5929):938-41. doi: 10.1126/science.1171396.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Cellular Biology, Baylor College of Medicine, 1 Baylor Plaza, Houston, TX 77030, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19443782" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; CCAAT-Enhancer-Binding Protein-beta/genetics/*metabolism ; Enzyme Activation ; Female ; *Fertility ; Gene Expression Profiling ; Granulosa Cells/enzymology/*metabolism ; Luteinizing Hormone/metabolism ; MAP Kinase Signaling System ; Meiosis ; Mice ; Mice, Inbred C57BL ; Mice, Transgenic ; Mitogen-Activated Protein Kinase 1/*metabolism ; Mitogen-Activated Protein Kinase 3/*metabolism ; Oocytes/physiology ; Ovarian Follicle/physiology ; *Ovulation ; Phosphorylation
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    The E3 ligase TRAF6 regulates Akt ubiquitination and activation (2009)
    American Association for the Advancement of Science (AAAS)
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    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
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    McsB is a protein arginine kinase that phosphorylates and inhibits the heat-shock regulator CtsR (2009)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2009-06-06
    Description: All living organisms face a variety of environmental stresses that cause the misfolding and aggregation of proteins. To eliminate damaged proteins, cells developed highly efficient stress response and protein quality control systems. We performed a biochemical and structural analysis of the bacterial CtsR/McsB stress response. The crystal structure of the CtsR repressor, in complex with DNA, pinpointed key residues important for high-affinity binding to the promoter regions of heat-shock genes. Moreover, biochemical characterization of McsB revealed that McsB specifically phosphorylates arginine residues in the DNA binding domain of CtsR, thereby impairing its function as a repressor of stress response genes. Identification of the CtsR/McsB arginine phospho-switch expands the repertoire of possible protein modifications involved in prokaryotic and eukaryotic transcriptional regulation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fuhrmann, Jakob -- Schmidt, Andreas -- Spiess, Silvia -- Lehner, Anita -- Turgay, Kursad -- Mechtler, Karl -- Charpentier, Emmanuelle -- Clausen, Tim -- New York, N.Y. -- Science. 2009 Jun 5;324(5932):1323-7. doi: 10.1126/science.1170088.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Research Institute of Molecular Pathology, Dr. Bohrgasse 7, A-1030 Vienna, Austria.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19498169" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Arginine/metabolism ; Bacterial Proteins/*antagonists & inhibitors/chemistry/genetics/*metabolism ; Crystallography, X-Ray ; DNA, Bacterial/metabolism ; Electrophoretic Mobility Shift Assay ; Gene Expression Regulation, Bacterial ; Geobacillus stearothermophilus/genetics/*metabolism ; Heat-Shock Response/*genetics ; Helix-Turn-Helix Motifs ; Models, Molecular ; Molecular Sequence Data ; Mutagenesis, Site-Directed ; Phosphorylation ; Promoter Regions, Genetic ; Protein Kinases/chemistry/genetics/*metabolism ; Protein Structure, Tertiary ; Repressor Proteins/*antagonists & inhibitors/chemistry/genetics/*metabolism ; Tandem Mass Spectrometry
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    Activation of the PI3K pathway in cancer through inhibition of PTEN by exchange factor P-REX2a (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-09-05
    Description: PTEN (phosphatase and tensin homolog on chromosome 10) is a tumor suppressor whose cellular regulation remains incompletely understood. We identified phosphatidylinositol 3,4,5-trisphosphate RAC exchanger 2a (P-REX2a) as a PTEN-interacting protein. P-REX2a mRNA was more abundant in human cancer cells and significantly increased in tumors with wild-type PTEN that expressed an activated mutant of PIK3CA encoding the p110 subunit of phosphoinositide 3-kinase subunit alpha (PI3Kalpha). P-REX2a inhibited PTEN lipid phosphatase activity and stimulated the PI3K pathway only in the presence of PTEN. P-REX2a stimulated cell growth and cooperated with a PIK3CA mutant to promote growth factor-independent proliferation and transformation. Depletion of P-REX2a reduced amounts of phosphorylated AKT and growth in human cell lines with intact PTEN. Thus, P-REX2a is a component of the PI3K pathway that can antagonize PTEN in cancer cells.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2936784/" 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/PMC2936784/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fine, Barry -- Hodakoski, Cindy -- Koujak, Susan -- Su, Tao -- Saal, Lao H -- Maurer, Matthew -- Hopkins, Benjamin -- Keniry, Megan -- Sulis, Maria Luisa -- Mense, Sarah -- Hibshoosh, Hanina -- Parsons, Ramon -- CA097403/CA/NCI NIH HHS/ -- P01 CA097403/CA/NCI NIH HHS/ -- P01 CA097403-01A10003/CA/NCI NIH HHS/ -- P01 CA097403-06A1/CA/NCI NIH HHS/ -- R01 CA082783/CA/NCI NIH HHS/ -- R01 CA082783-06/CA/NCI NIH HHS/ -- R01 CA082783-07/CA/NCI NIH HHS/ -- R01 CA082783-08/CA/NCI NIH HHS/ -- R01 CA082783-09/CA/NCI NIH HHS/ -- R01 CA082783-10/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2009 Sep 4;325(5945):1261-5. doi: 10.1126/science.1173569.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Cancer Genetics and Herbert Irving Comprehensive Cancer Center, Columbia University, 1130 St. Nicholas Avenue, New York, NY 10032, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19729658" target="_blank"〉PubMed〈/a〉
    Keywords: Breast Neoplasms/genetics/metabolism/pathology ; Cell Line ; Cell Line, Tumor ; Cell Proliferation ; Female ; GTPase-Activating Proteins/genetics/*metabolism ; Guanine Nucleotide Exchange Factors ; Humans ; Male ; Mutation ; Neoplasms/genetics/*metabolism/pathology ; PTEN Phosphohydrolase/*antagonists & inhibitors/chemistry/genetics/*metabolism ; Phosphatidylinositol 3-Kinases/*metabolism ; Phosphorylation ; Protein Binding ; Protein Structure, Tertiary ; Proto-Oncogene Proteins c-akt/metabolism ; Signal Transduction
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    AMPK regulates the circadian clock by cryptochrome phosphorylation and degradation (2009)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2009-10-17
    Description: Circadian clocks coordinate behavioral and physiological processes with daily light-dark cycles by driving rhythmic transcription of thousands of genes. Whereas the master clock in the brain is set by light, pacemakers in peripheral organs, such as the liver, are reset by food availability, although the setting, or "entrainment," mechanisms remain mysterious. Studying mouse fibroblasts, we demonstrated that the nutrient-responsive adenosine monophosphate-activated protein kinase (AMPK) phosphorylates and destabilizes the clock component cryptochrome 1 (CRY1). In mouse livers, AMPK activity and nuclear localization were rhythmic and inversely correlated with CRY1 nuclear protein abundance. Stimulation of AMPK destabilized cryptochromes and altered circadian rhythms, and mice in which the AMPK pathway was genetically disrupted showed alterations in peripheral clocks. Thus, phosphorylation by AMPK enables cryptochrome to transduce nutrient signals to circadian clocks in mammalian peripheral organs.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2819106/" 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/PMC2819106/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lamia, Katja A -- Sachdeva, Uma M -- DiTacchio, Luciano -- Williams, Elliot C -- Alvarez, Jacqueline G -- Egan, Daniel F -- Vasquez, Debbie S -- Juguilon, Henry -- Panda, Satchidananda -- Shaw, Reuben J -- Thompson, Craig B -- Evans, Ronald M -- CA104838/CA/NCI NIH HHS/ -- DK057978/DK/NIDDK NIH HHS/ -- DK062434/DK/NIDDK NIH HHS/ -- DK080425/DK/NIDDK NIH HHS/ -- EY016807/EY/NEI NIH HHS/ -- P01 CA104838/CA/NCI NIH HHS/ -- P01 CA104838-05S1/CA/NCI NIH HHS/ -- P30 CA014195/CA/NCI NIH HHS/ -- R01 DK080425/DK/NIDDK NIH HHS/ -- R01 DK080425-03/DK/NIDDK NIH HHS/ -- R01 EY016807/EY/NEI NIH HHS/ -- R01 EY016807-03/EY/NEI NIH HHS/ -- R37 DK057978/DK/NIDDK NIH HHS/ -- R37 DK057978-31/DK/NIDDK NIH HHS/ -- T32 HL007439/HL/NHLBI NIH HHS/ -- T32 HL007439-27/HL/NHLBI NIH HHS/ -- T32-HL07439-27/HL/NHLBI NIH HHS/ -- U19 DK062434/DK/NIDDK NIH HHS/ -- U19 DK062434-08S19002/DK/NIDDK NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2009 Oct 16;326(5951):437-40. doi: 10.1126/science.1172156.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Gene Expression Laboratory, the Salk Institute, La Jolla, CA 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19833968" target="_blank"〉PubMed〈/a〉
    Keywords: AMP-Activated Protein Kinases/*metabolism ; ARNTL Transcription Factors ; Amino Acid Substitution ; Aminoimidazole Carboxamide/analogs & derivatives/pharmacology ; Animals ; Basic Helix-Loop-Helix Transcription Factors/genetics ; Cell Line ; Cell Nucleus/metabolism ; Cells, Cultured ; Circadian Rhythm/*physiology ; Cryptochromes ; Culture Media ; Flavoproteins/genetics/*metabolism ; Food ; Glucose/metabolism/pharmacology ; Humans ; Liver/*metabolism ; Mice ; Mutagenesis, Site-Directed ; Mutant Proteins/metabolism ; Phosphorylation ; Promoter Regions, Genetic ; Protein Stability ; Recombinant Fusion Proteins/metabolism ; Ribonucleotides/pharmacology ; Signal Transduction
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    Cell-specific information processing in segregating populations of Eph receptor ephrin-expressing cells (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-12-17
    Description: Cells have self-organizing properties that control their behavior in complex tissues. Contact between cells expressing either B-type Eph receptors or their transmembrane ephrin ligands initiates bidirectional signals that regulate cell positioning. However, simultaneously investigating how information is processed in two interacting cell types remains a challenge. We implemented a proteomic strategy to systematically determine cell-specific signaling networks underlying EphB2- and ephrin-B1-controlled cell sorting. Quantitative mass spectrometric analysis of mixed populations of EphB2- and ephrin-B1-expressing cells that were labeled with different isotopes revealed cell-specific tyrosine phosphorylation events. Functional associations between these phosphotyrosine signaling networks and cell sorting were established with small interfering RNA screening. Data-driven network modeling revealed that signaling between mixed EphB2- and ephrin-B1-expressing cells is asymmetric and that the distinct cell types use different tyrosine kinases and targets to process signals induced by cell-cell contact. We provide systems- and cell-specific network models of contact-initiated signaling between two distinct cell types.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jorgensen, Claus -- Sherman, Andrew -- Chen, Ginny I -- Pasculescu, Adrian -- Poliakov, Alexei -- Hsiung, Marilyn -- Larsen, Brett -- Wilkinson, David G -- Linding, Rune -- Pawson, Tony -- MC_U117532048/Medical Research Council/United Kingdom -- MOP-6849/Canadian Institutes of Health Research/Canada -- New York, N.Y. -- Science. 2009 Dec 11;326(5959):1502-9. doi: 10.1126/science.1176615.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Samuel Lunenfeld Research Institute (SLRI), Mount Sinai Hospital, Toronto M5G 1X5, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20007894" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptor Proteins, Signal Transducing/metabolism ; Algorithms ; Cell Line ; Ephrin-B1/genetics/*metabolism ; Humans ; Ligands ; Mass Spectrometry ; Models, Biological ; PDZ Domains ; Phosphorylation ; Protein Binding ; Protein Interaction Domains and Motifs ; Protein-Tyrosine Kinases/metabolism ; Proteomics ; RNA, Small Interfering ; Receptor, EphB2/genetics/*metabolism ; *Signal Transduction ; Tyrosine/metabolism ; src Homology Domains
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    The dynamic control of kiss-and-run and vesicular reuse probed with single nanoparticles (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-02-14
    Description: Vesicular secretion of neurotransmitter is essential for neuronal communication. Kiss-and-run is a mode of membrane fusion and retrieval without the full collapse of the vesicle into the plasma membrane and de novo regeneration. The importance of kiss-and-run during efficient neurotransmission has remained in doubt. We developed an approach for loading individual synaptic vesicles with single quantum dots. Their size and pH-dependent photoluminescence change allowed us to distinguish kiss-and-run from full-collapse fusion and to track single vesicles through multiple rounds of kiss-and-run and reuse, without perturbing vesicle cycling. Kiss-and-run dominated at the beginning of stimulus trains, reflecting the preference of vesicles with high release probability. Its incidence was increased by rapid firing, a response appropriate to shape the kinetics of neurotransmission during a wide range of firing patterns.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2696197/" 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/PMC2696197/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhang, Qi -- Li, Yulong -- Tsien, Richard W -- K99 DA025143/DA/NIDA NIH HHS/ -- K99 DA025143-01A1/DA/NIDA NIH HHS/ -- R01 MH064070/MH/NIMH NIH HHS/ -- R01 MH064070-08/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 2009 Mar 13;323(5920):1448-53. doi: 10.1126/science.1167373. Epub 2009 Feb 12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Cellular Physiology, Stanford University, Stanford, CA 94305, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19213879" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Electric Stimulation ; Hippocampus/cytology ; Hydrogen-Ion Concentration ; Ion Transport ; Luminescence ; *Membrane Fusion ; Neurons/*physiology ; Neurotransmitter Agents/metabolism ; Presynaptic Terminals/physiology ; Quantum Dots ; Rats ; Rats, Sprague-Dawley ; Synaptic Membranes/physiology ; *Synaptic Transmission ; Synaptic Vesicles/*physiology
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    Traction on immobilized netrin-1 is sufficient to reorient axons (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-07-11
    Description: During embryonic development, axons are guided to their target by patterning proteins encountered along their trajectory. These cues can be linked to the cells that produce them or secreted into the extracellular matrix. Whether secreted cues, like netrin-1, provide traction for the growth cone when they become attached to the extracellular matrix is unclear. Advancing spinal commissural neuron growth cones were shown to generate local forces of 4 to 15 piconewtons but, when confronted with immobilized netrin-1, generated traction forces in excess of 63 piconewtons on netrin-1 that can redirect the trajectory of the axon.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2746731/" 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/PMC2746731/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Moore, Simon W -- Biais, Nicolas -- Sheetz, Michael P -- AI079030/AI/NIAID NIH HHS/ -- PN2 EY016586/EY/NEI NIH HHS/ -- PN2 EY016586-02/EY/NEI NIH HHS/ -- PN2 EY016586-04/EY/NEI NIH HHS/ -- PN2 EY016586-05/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 2009 Jul 10;325(5937):166. doi: 10.1126/science.1173851.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Sciences, Columbia University, 1212 Amsterdam Avenue, New York, NY 10027, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19589994" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Axons/*physiology ; Biomechanical Phenomena ; Cells, Cultured ; Cues ; Growth Cones/*physiology ; Immobilized Proteins/*physiology ; Mice ; Nerve Growth Factors/*physiology ; Neurons/physiology ; Receptors, Cell Surface/physiology ; Spinal Cord/cytology/embryology ; Tumor Suppressor Proteins/*physiology
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    HIV/AIDS research. Potent HIV antibodies spark vaccine hopes (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-09-05
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cohen, Jon -- New York, N.Y. -- Science. 2009 Sep 4;325(5945):1195. doi: 10.1126/science.325_1195.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19729632" target="_blank"〉PubMed〈/a〉
    Keywords: AIDS Vaccines ; Antibodies, Monoclonal/immunology ; Antibody Specificity ; Cells, Cultured ; HIV/*immunology ; HIV Antibodies/*immunology ; HIV Antigens/immunology ; HIV Infections/*immunology ; Human Immunodeficiency Virus Proteins/chemistry/*immunology ; Humans ; Neutralization Tests ; Protein Multimerization
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    Hematopoietic cytokines can instruct lineage choice (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-07-11
    Description: The constant regeneration of the blood system during hematopoiesis requires tightly controlled lineage decisions of hematopoietic progenitor cells (HPCs). Because of technical limitations, differentiation of individual HPCs could not previously be analyzed continuously. It was therefore disputed whether cell-extrinsic cytokines can instruct HPC lineage choice or only allow survival of cells that are already lineage-restricted. Here, we used bioimaging approaches that allow the continuous long-term observation of individual differentiating mouse HPCs. We demonstrate that the physiological cytokines, macrophage colony-stimulating factor and granulocyte colony-stimulating factor, can instruct hematopoietic lineage choice.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rieger, Michael A -- Hoppe, Philipp S -- Smejkal, Benjamin M -- Eitelhuber, Andrea C -- Schroeder, Timm -- New York, N.Y. -- Science. 2009 Jul 10;325(5937):217-8. doi: 10.1126/science.1171461.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Stem Cell Research, Helmholtz Zentrum Munchen-German Research Center for Environmental Health, Neuherberg-Munich, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19590005" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Death ; *Cell Lineage ; Cells, Cultured ; Colony-Forming Units Assay ; Granulocyte Colony-Stimulating Factor/*physiology ; Granulocyte-Macrophage Progenitor Cells/*cytology/*physiology ; Macrophage Colony-Stimulating Factor/*physiology ; Mice ; Monocytes/cytology ; Myelopoiesis ; Neutrophils/cytology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Halofuginone inhibits TH17 cell differentiation by activating the amino acid starvation response (2009)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2009-06-06
    Description: A central challenge for improving autoimmune therapy is preventing inflammatory pathology without inducing generalized immunosuppression. T helper 17 (TH17) cells, characterized by their production of interleukin-17, have emerged as important and broad mediators of autoimmunity. Here we show that the small molecule halofuginone (HF) selectively inhibits mouse and human TH17 differentiation by activating a cytoprotective signaling pathway, the amino acid starvation response (AAR). Inhibition of TH17 differentiation by HF is rescued by the addition of excess amino acids and is mimicked by AAR activation after selective amino acid depletion. HF also induces the AAR in vivo and protects mice from TH17-associated experimental autoimmune encephalomyelitis. These results indicate that the AAR pathway is a potent and selective regulator of inflammatory T cell differentiation in vivo.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2803727/" 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/PMC2803727/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sundrud, Mark S -- Koralov, Sergei B -- Feuerer, Markus -- Calado, Dinis Pedro -- Kozhaya, Aimee Elhed -- Rhule-Smith, Ava -- Lefebvre, Rachel E -- Unutmaz, Derya -- Mazitschek, Ralph -- Waldner, Hanspeter -- Whitman, Malcolm -- Keller, Tracy -- Rao, Anjana -- R01 AI040127/AI/NIAID NIH HHS/ -- R01 AI040127-09/AI/NIAID NIH HHS/ -- R01 AI048213/AI/NIAID NIH HHS/ -- R01 AI048213-01/AI/NIAID NIH HHS/ -- R01 CA042471/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2009 Jun 5;324(5932):1334-8. doi: 10.1126/science.1172638.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology, Harvard Medical School and Immune Disease Institute, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19498172" target="_blank"〉PubMed〈/a〉
    Keywords: Activating Transcription Factor 4/metabolism ; Amino Acids/*metabolism/pharmacology ; Animals ; Autoimmunity/drug effects ; Cell Differentiation/drug effects ; Cytokines/metabolism ; Encephalomyelitis, Autoimmune, Experimental/drug therapy/immunology ; Eukaryotic Initiation Factor-2/metabolism ; Gene Expression ; Humans ; Interleukin-17/biosynthesis/genetics ; Lymphopoiesis/drug effects ; Mice ; Mice, Inbred C57BL ; Phosphorylation ; Piperidines/*pharmacology/therapeutic use ; Protein-Serine-Threonine Kinases/metabolism ; Quinazolinones/*pharmacology/therapeutic use ; Signal Transduction ; T-Lymphocyte Subsets/cytology/*drug effects/immunology/metabolism ; T-Lymphocytes, Helper-Inducer/cytology/*drug effects/immunology/metabolism
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    Cell biology. Moonlighting in mitochondria (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-02-07
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Myers, Martin G Jr -- New York, N.Y. -- Science. 2009 Feb 6;323(5915):723-4. doi: 10.1126/science.1169660.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Metabolism, Endocrinology and Diabetes, Department of Internal Medicine, and Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI 48109, USA. mgmyers@umich.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19197047" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; B-Lymphocytes/metabolism ; Cell Respiration ; Cytokines/metabolism ; Electron Transport Complex I/metabolism ; Electron Transport Complex II/metabolism ; Mice ; Mitochondria/*metabolism ; Mitochondria, Heart/metabolism ; Mitochondria, Liver/metabolism ; *Oxidative Phosphorylation ; Phosphorylation ; STAT3 Transcription Factor/chemistry/*metabolism ; Serine/metabolism ; Signal Transduction
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    Physiology. Feeding the clock (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-10-17
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Suter, David M -- Schibler, Ueli -- New York, N.Y. -- Science. 2009 Oct 16;326(5951):378-9. doi: 10.1126/science.1181278.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology, Sciences III, University of Geneva, and National Centre of Competence in Research Frontiers in Genetics, 30 Quai Ernest Ansermet, 1211 Geneva, Switzerland. david.suter@unige.ch〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19833950" target="_blank"〉PubMed〈/a〉
    Keywords: AMP-Activated Protein Kinases/*metabolism ; Animals ; Cells, Cultured ; *Circadian Rhythm ; Cryptochromes ; Cues ; Flavoproteins/chemistry/genetics/*metabolism ; Food ; Gene Expression Regulation ; Glucose/metabolism ; Liver/metabolism ; Mice ; Mutagenesis, Site-Directed ; Phosphorylation
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    Host inhibition of a bacterial virulence effector triggers immunity to infection (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-05-09
    Description: Plant pathogenic bacteria secrete effector proteins that attack the host signaling machinery to suppress immunity. Effectors can be recognized by hosts leading to immunity. One such effector is AvrPtoB of Pseudomonas syringae, which degrades host protein kinases, such as tomato Fen, through an E3 ligase domain. Pto kinase, which is highly related to Fen, recognizes AvrPtoB in conjunction with the resistance protein Prf. Here we show that Pto is resistant to AvrPtoB-mediated degradation because it inactivates the E3 ligase domain. AvrPtoB ubiquitinated Fen within the catalytic cleft, leading to its breakdown and loss of the associated Prf protein. Pto avoids this by phosphorylating and inactivating the AvrPtoB E3 domain. Thus, inactivation of a pathogen virulence molecule is one mechanism by which plants resist disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ntoukakis, Vardis -- Mucyn, Tatiana S -- Gimenez-Ibanez, Selena -- Chapman, Helen C -- Gutierrez, Jose R -- Balmuth, Alexi L -- Jones, Alexandra M E -- Rathjen, John P -- BB/D00456X/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- New York, N.Y. -- Science. 2009 May 8;324(5928):784-7. doi: 10.1126/science.1169430.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Sainsbury Laboratory, Colney, Norwich NR4 7UH, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19423826" target="_blank"〉PubMed〈/a〉
    Keywords: Bacterial Proteins/*antagonists & inhibitors/chemistry/genetics/metabolism ; Immunity, Innate ; Lycopersicon esculentum/genetics/*metabolism/*microbiology ; Mutant Proteins/metabolism ; Phosphorylation ; Plant Diseases/immunology/*microbiology ; Plant Leaves/metabolism ; Plant Proteins/*metabolism ; Plants, Genetically Modified ; Protein Structure, Tertiary ; Protein-Serine-Threonine Kinases/*metabolism ; Pseudomonas syringae/genetics/growth & development/metabolism/*pathogenicity ; Signal Transduction ; Tobacco/genetics/metabolism/microbiology ; Ubiquitin-Protein Ligases/metabolism ; Ubiquitination ; Virulence Factors/antagonists & inhibitors/metabolism
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    The orphan G protein-coupled receptor 3 modulates amyloid-beta peptide generation in neurons (2009)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2009-02-14
    Description: Deposition of the amyloid-beta peptide is a pathological hallmark of Alzheimer's disease. A high-throughput functional genomics screen identified G protein-coupled receptor 3 (GPR3), a constitutively active orphan G protein-coupled receptor, as a modulator of amyloid-beta production. Overexpression of GPR3 stimulated amyloid-beta production, whereas genetic ablation of GPR3 prevented accumulation of the amyloid-beta peptide in vitro and in an Alzheimer's disease mouse model. GPR3 expression led to increased formation and cell-surface localization of the mature gamma-secretase complex in the absence of an effect on Notch processing. GPR3 is highly expressed in areas of the normal human brain implicated in Alzheimer's disease and is elevated in the sporadic Alzheimer's disease brain. Thus, GPR3 represents a potential therapeutic target for the treatment of Alzheimer's disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Thathiah, Amantha -- Spittaels, Kurt -- Hoffmann, Marcel -- Staes, Mik -- Cohen, Adrian -- Horre, Katrien -- Vanbrabant, Mieke -- Coun, Frea -- Baekelandt, Veerle -- Delacourte, Andre -- Fischer, David F -- Pollet, Dirk -- De Strooper, Bart -- Merchiers, Pascal -- New York, N.Y. -- Science. 2009 Feb 13;323(5916):946-51. doi: 10.1126/science.1160649.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Developmental Genetics, Vlaams Institute for Biotechnology, Center for Human Genetics, Catholic University of Leuven, Herestraat 49, 3000 Leuven, Belgium.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19213921" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Aged ; Amyloid Precursor Protein Secretases/metabolism ; Amyloid beta-Peptides/*biosynthesis ; Animals ; Cell Line ; Cell Line, Tumor ; Cells, Cultured ; Female ; Humans ; Male ; Mice ; Middle Aged ; Neurons/*metabolism ; Protein Structure, Tertiary ; Receptors, G-Protein-Coupled/*metabolism ; Receptors, Notch/metabolism ; Signal Transduction
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    Immunology. Amino acid addiction (2009)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2009-06-06
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Blander, J Magarian -- Amsen, Derk -- New York, N.Y. -- Science. 2009 Jun 5;324(5932):1282-3. doi: 10.1126/science.1175678.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Immunology Institute, Department of Medicine, Mount Sinai School of Medicine, New York, NY 10029, USA. julie.blander@mssm.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19498159" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acids/*metabolism ; Animals ; Autoimmunity/drug effects ; Cell Differentiation/drug effects ; Eukaryotic Initiation Factor-2/metabolism ; Evolution, Molecular ; Gene Expression Regulation/drug effects ; Humans ; Interleukin-17/biosynthesis ; Lymphopoiesis/drug effects ; Mice ; Multiple Sclerosis/immunology ; Phosphorylation ; Piperidines/*pharmacology ; Protein Biosynthesis ; Protein-Serine-Threonine Kinases/metabolism ; Quinazolinones/*pharmacology ; Signal Transduction/drug effects ; T-Lymphocyte Subsets/cytology/*drug effects/immunology/metabolism ; T-Lymphocytes, Helper-Inducer/cytology/*drug effects/immunology/metabolism
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    Mitochondrial STAT3 supports Ras-dependent oncogenic transformation (2009)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2009-06-27
    Description: Signal transducer and activator of transcription 3 (STAT3) is a latent cytoplasmic transcription factor responsive to cytokine signaling and tyrosine kinase oncoproteins by nuclear translocation when it is tyrosine-phosphorylated. We report that malignant transformation by activated Ras is impaired without STAT3, in spite of the inability of Ras to drive STAT3 tyrosine phosphorylation or nuclear translocation. Moreover, STAT3 mutants that cannot be tyrosine-phosphorylated, that are retained in the cytoplasm, or that cannot bind DNA nonetheless supported Ras-mediated transformation. Unexpectedly, STAT3 was detected within mitochondria, and exclusive targeting of STAT3 to mitochondria without nuclear accumulation facilitated Ras transformation. Mitochondrial STAT3 sustained altered glycolytic and oxidative phosphorylation activities characteristic of cancer cells. Thus, in addition to its nuclear transcriptional role, STAT3 regulates a metabolic function in mitochondria, supporting Ras-dependent malignant transformation.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2840701/" 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/PMC2840701/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gough, Daniel J -- Corlett, Alicia -- Schlessinger, Karni -- Wegrzyn, Joanna -- Larner, Andrew C -- Levy, David E -- R01 AI028900/AI/NIAID NIH HHS/ -- R01 AI028900-19/AI/NIAID NIH HHS/ -- R01AI28900/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2009 Jun 26;324(5935):1713-6. doi: 10.1126/science.1171721.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology and New York University Cancer Institute, New York University School of Medicine, 550 First Avenue, New York, NY 10016, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19556508" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Cell Line, Tumor ; Cell Nucleus/metabolism ; Cell Proliferation ; Cell Survival ; *Cell Transformation, Neoplastic ; Genes, ras ; Glycolysis ; Membrane Potential, Mitochondrial ; Mice ; Mice, Inbred BALB C ; Mitochondria/*metabolism ; Mutant Proteins/metabolism ; Neoplasms, Experimental/metabolism/pathology ; Neoplastic Stem Cells ; Oxidative Phosphorylation ; Phosphorylation ; STAT3 Transcription Factor/genetics/*metabolism ; Signal Transduction ; ras Proteins/*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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    Plant science. Pores in place (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-01-31
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sack, Fred D -- Chen, Jin-Gui -- New York, N.Y. -- Science. 2009 Jan 30;323(5914):592-3. doi: 10.1126/science.1169553.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Botany, University of British Columbia, Vancouver, BC V6T 1Z4, Canada. fsack@interchange.ubc.ca〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19179518" target="_blank"〉PubMed〈/a〉
    Keywords: Arabidopsis/cytology/genetics/*metabolism ; Arabidopsis Proteins/metabolism ; Basic Helix-Loop-Helix Transcription Factors/metabolism ; Cell Division ; Cell Polarity ; Cues ; Genes, Plant ; *MAP Kinase Signaling System ; Phosphorylation ; Plant Epidermis/cytology/growth & development ; Plant Proteins/genetics/*metabolism ; Plant Stomata/cytology/*growth & development ; Protein Kinases/genetics/*metabolism ; Transcription Factors/metabolism ; Zea mays/cytology/genetics/growth & development/*metabolism
    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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  • 50
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    Molecular mechanisms of HipA-mediated multidrug tolerance and its neutralization by HipB (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-01-20
    Description: Bacterial multidrug tolerance is largely responsible for the inability of antibiotics to eradicate infections and is caused by a small population of dormant bacteria called persisters. HipA is a critical Escherichia coli persistence factor that is normally neutralized by HipB, a transcription repressor, which also regulates hipBA expression. Here, we report multiple structures of HipA and a HipA-HipB-DNA complex. HipA has a eukaryotic serine/threonine kinase-like fold and can phosphorylate the translation factor EF-Tu, suggesting a persistence mechanism via cell stasis. The HipA-HipB-DNA structure reveals the HipB-operator binding mechanism, approximately 70 degrees DNA bending, and unexpected HipA-DNA contacts. Dimeric HipB interacts with two HipA molecules to inhibit its kinase activity through sequestration and conformational inactivation. Combined, these studies suggest mechanisms for HipA-mediated persistence and its neutralization by HipB.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2764309/" 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/PMC2764309/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schumacher, Maria A -- Piro, Kevin M -- Xu, Weijun -- Hansen, Sonja -- Lewis, Kim -- Brennan, Richard G -- AI048593/AI/NIAID NIH HHS/ -- GM061162/GM/NIGMS NIH HHS/ -- GM074815/GM/NIGMS NIH HHS/ -- R01 GM061162/GM/NIGMS NIH HHS/ -- R01 GM061162-09/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2009 Jan 16;323(5912):396-401. doi: 10.1126/science.1163806.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Molecular Biology, University of Texas, M. D. Anderson Cancer Center, Unit 1000, Houston, TX 77030, USA. maschuma@mdanderson.org〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19150849" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphate/metabolism ; Crystallization ; Crystallography, X-Ray ; DNA, Bacterial/chemistry/metabolism ; DNA-Binding Proteins/chemistry/genetics/*metabolism ; Dimerization ; *Drug Tolerance ; Escherichia coli/chemistry/*drug effects/genetics/*metabolism ; Escherichia coli Proteins/antagonists & inhibitors/chemistry/genetics/*metabolism ; Models, Molecular ; Nucleic Acid Conformation ; Operator Regions, Genetic ; Operon ; Peptide Elongation Factor Tu/metabolism ; Phosphorylation ; Protein Conformation ; Protein Folding ; Protein Kinase Inhibitors/metabolism ; Protein Kinases/chemistry/metabolism ; Protein Structure, Secondary ; Protein Structure, Tertiary
    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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    A gene network regulating lysosomal biogenesis and function (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-06-27
    Description: Lysosomes are organelles central to degradation and recycling processes in animal cells. Whether lysosomal activity is coordinated to respond to cellular needs remains unclear. We found that most lysosomal genes exhibit coordinated transcriptional behavior and are regulated by the transcription factor EB (TFEB). Under aberrant lysosomal storage conditions, TFEB translocated from the cytoplasm to the nucleus, resulting in the activation of its target genes. TFEB overexpression in cultured cells induced lysosomal biogenesis and increased the degradation of complex molecules, such as glycosaminoglycans and the pathogenic protein that causes Huntington's disease. Thus, a genetic program controls lysosomal biogenesis and function, providing a potential therapeutic target to enhance cellular clearing in lysosomal storage disorders and neurodegenerative diseases.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sardiello, Marco -- Palmieri, Michela -- di Ronza, Alberto -- Medina, Diego Luis -- Valenza, Marta -- Gennarino, Vincenzo Alessandro -- Di Malta, Chiara -- Donaudy, Francesca -- Embrione, Valerio -- Polishchuk, Roman S -- Banfi, Sandro -- Parenti, Giancarlo -- Cattaneo, Elena -- Ballabio, Andrea -- GTF08001/Telethon/Italy -- TGM06C01/Telethon/Italy -- TGM06C05/Telethon/Italy -- New York, N.Y. -- Science. 2009 Jul 24;325(5939):473-7. doi: 10.1126/science.1174447. Epub 2009 Jun 25.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Telethon Institute of Genetics and Medicine, Via P. Castellino 111, 80131 Naples, Italy.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19556463" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Basic Helix-Loop-Helix Leucine Zipper Transcription Factors/metabolism ; Cells, Cultured ; Chromatin Immunoprecipitation ; Consensus Sequence ; *Gene Regulatory Networks ; HeLa Cells ; Humans ; Inverted Repeat Sequences ; Lysosomes/*genetics/*physiology ; Mice ; Promoter Regions, Genetic ; Sucrose/metabolism ; Transcription Factors/metabolism
    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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  • 52
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    Neuronal activity-induced Gadd45b promotes epigenetic DNA demethylation and adult neurogenesis (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-01-03
    Description: The mammalian brain exhibits diverse types of neural plasticity, including activity-dependent neurogenesis in the adult hippocampus. How transient activation of mature neurons leads to long-lasting modulation of adult neurogenesis is unknown. Here we identify Gadd45b as a neural activity-induced immediate early gene in mature hippocampal neurons. Mice with Gadd45b deletion exhibit specific deficits in neural activity-induced proliferation of neural progenitors and dendritic growth of newborn neurons in the adult hippocampus. Mechanistically, Gadd45b is required for activity-induced DNA demethylation of specific promoters and expression of corresponding genes critical for adult neurogenesis, including brain-derived neurotrophic factor and fibroblast growth factor. Thus, Gadd45b links neuronal circuit activity to epigenetic DNA modification and expression of secreted factors in mature neurons for extrinsic modulation of neurogenesis in the adult brain.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2726986/" 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/PMC2726986/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ma, Dengke K -- Jang, Mi-Hyeon -- Guo, Junjie U -- Kitabatake, Yasuji -- Chang, Min-Lin -- Pow-Anpongkul, Nattapol -- Flavell, Richard A -- Lu, Binfeng -- Ming, Guo-Li -- Song, Hongjun -- R01 HD069184/HD/NICHD NIH HHS/ -- R01 NS048271/NS/NINDS NIH HHS/ -- R01 NS048271-05/NS/NINDS NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2009 Feb 20;323(5917):1074-7. doi: 10.1126/science.1166859. Epub 2009 Jan 1.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Cell Engineering, Johns Hopkins University School of Medicine, 733 North Broadway, Baltimore, MD 21205, USA. dma2@jhmi.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19119186" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, Differentiation/*genetics/*metabolism ; Brain-Derived Neurotrophic Factor/genetics ; Cell Proliferation ; Cells, Cultured ; DNA/metabolism ; *DNA Methylation ; Dendrites/physiology/ultrastructure ; Dentate Gyrus/cytology/physiology ; Electroshock ; *Epigenesis, Genetic ; Fibroblast Growth Factor 1/genetics ; Gene Expression Profiling ; Genes, Immediate-Early ; Hippocampus/cytology/*physiology ; Mice ; Mice, Knockout ; *Neurogenesis ; Neurons/*physiology ; Physical Exertion ; Stem Cells/cytology/physiology ; Transcriptional Activation
    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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    Reproductive biology. Study suggests a renewable source of eggs and stirs more controversy (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-04-18
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Normile, Dennis -- New York, N.Y. -- Science. 2009 Apr 17;324(5925):320. doi: 10.1126/science.324.5925.320.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19372397" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Female ; Germ Cells/*cytology ; Humans ; Immunomagnetic Separation ; Mice ; Oocytes/*cytology ; *Oogenesis ; Ovary/*cytology ; Stem Cells/*cytology
    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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  • 54
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    Fluorescent false neurotransmitters visualize dopamine release from individual presynaptic terminals (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-05-09
    Description: The nervous system transmits signals between neurons via neurotransmitter release during synaptic vesicle fusion. In order to observe neurotransmitter uptake and release from individual presynaptic terminals directly, we designed fluorescent false neurotransmitters as substrates for the synaptic vesicle monoamine transporter. Using these probes to image dopamine release in the striatum, we made several observations pertinent to synaptic plasticity. We found that the fraction of synaptic vesicles releasing neurotransmitter per stimulus was dependent on the stimulus frequency. A kinetically distinct "reserve" synaptic vesicle population was not observed under these experimental conditions. A frequency-dependent heterogeneity of presynaptic terminals was revealed that was dependent in part on D2 dopamine receptors, indicating a mechanism for frequency-dependent coding of presynaptic selection.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gubernator, Niko G -- Zhang, Hui -- Staal, Roland G W -- Mosharov, Eugene V -- Pereira, Daniela B -- Yue, Minerva -- Balsanek, Vojtech -- Vadola, Paul A -- Mukherjee, Bipasha -- Edwards, Robert H -- Sulzer, David -- Sames, Dalibor -- R01 DA007418/DA/NIDA NIH HHS/ -- New York, N.Y. -- Science. 2009 Jun 12;324(5933):1441-4. doi: 10.1126/science.1172278. Epub 2009 May 7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry, Columbia University, New York, NY 10027, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19423778" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Benz(a)Anthracenes/*metabolism ; Cells, Cultured ; Chromaffin Cells/*metabolism ; Corpus Striatum/cytology/*metabolism ; Dopamine/*metabolism ; Dopamine Antagonists/pharmacology ; Dopamine D2 Receptor Antagonists ; Electric Stimulation ; Exocytosis ; Fluorescent Dyes ; Mice ; Mice, Transgenic ; Neuronal Plasticity ; Neurotransmitter Agents/*metabolism ; Presynaptic Terminals/*metabolism ; Receptors, Dopamine D2/metabolism ; Sulpiride/pharmacology ; Synaptic Vesicles/*metabolism
    Print ISSN: 0036-8075
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  • 55
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    Phosphorylation of H2A by Bub1 prevents chromosomal instability through localizing shugoshin (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-12-08
    Description: Bub1 is a multi-task protein kinase required for proper chromosome segregation in eukaryotes. Impairment of Bub1 in humans may lead to chromosomal instability (CIN) or tumorigenesis. Yet, the primary cellular substrate of Bub1 has remained elusive. Here, we show that Bub1 phosphorylates the conserved serine 121 of histone H2A in fission yeast Schizosaccharomyces pombe. The h2a-SA mutant, in which all cellular H2A-S121 is replaced by alanine, phenocopies the bub1 kinase-dead mutant (bub1-KD) in losing the centromeric localization of shugoshin proteins. Artificial tethering of shugoshin to centromeres largely restores the h2a-SA or bub1-KD-related CIN defects, a function that is evolutionally conserved. Thus, Bub1 kinase creates a mark for shugoshin localization and the correct partitioning of chromosomes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kawashima, Shigehiro A -- Yamagishi, Yuya -- Honda, Takashi -- Ishiguro, Kei-ichiro -- Watanabe, Yoshinori -- New York, N.Y. -- Science. 2010 Jan 8;327(5962):172-7. doi: 10.1126/science.1180189. Epub 2009 Nov 19.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Chromosome Dynamics, Institute of Molecular and Cellular Biosciences, University of Tokyo, Yayoi, Tokyo 113-0032, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19965387" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Centromere/*metabolism ; *Chromosomal Instability ; Chromosomal Proteins, Non-Histone/genetics/*metabolism ; *Chromosome Segregation ; Chromosomes, Fungal/metabolism ; Histones/*metabolism ; Humans ; Kinetochores/metabolism ; Meiosis ; Mice ; Mitosis ; Nucleosomes/metabolism ; Phosphorylation ; Protein-Serine-Threonine Kinases/genetics/*metabolism ; Recombinant Proteins/metabolism ; Saccharomyces cerevisiae/genetics/metabolism ; Saccharomyces cerevisiae Proteins/genetics/metabolism ; Schizosaccharomyces/cytology/genetics/*metabolism ; Schizosaccharomyces pombe Proteins/genetics/*metabolism ; Serine/metabolism
    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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