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  • 1
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    Mammalian TOR: a homeostatic ATP sensor (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-11-03
    Description: The bacterial macrolide rapamycin is an efficacious anticancer agent against solid tumors. In a hypoxic environment, the increase in mass of solid tumors is dependent on the recruitment of mitogens and nutrients. When nutrient concentrations change, particularly those of essential amino acids, the mammalian Target of Rapamycin (mTOR) functions in regulatory pathways that control ribosome biogenesis and cell growth. In bacteria, ribosome biogenesis is independently regulated by amino acids and adenosine triphosphate (ATP). Here we demonstrate that the mTOR pathway is influenced by the intracellular concentration of ATP, independent of the abundance of amino acids, and that mTOR itself is an ATP sensor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dennis, P B -- Jaeschke, A -- Saitoh, M -- Fowler, B -- Kozma, S C -- Thomas, G -- New York, N.Y. -- Science. 2001 Nov 2;294(5544):1102-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Friedrich Miescher Institute for Biomedical Research, Maulbeerstrasse 66, CH-4058, Basel, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11691993" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptor Proteins, Signal Transducing ; Adenosine Triphosphate/*metabolism ; Amino Acids/metabolism ; Androstadienes/pharmacology ; Carrier Proteins/metabolism ; Cell Line ; Deoxyglucose/pharmacology ; Enzyme Activation ; Homeostasis ; Humans ; Insulin/pharmacology ; Kinetics ; Phosphoproteins/metabolism ; Phosphorylation ; Protein Kinases/*metabolism ; RNA, Transfer, Amino Acyl/metabolism ; Recombinant Fusion Proteins/metabolism ; Ribosomal Protein S6 Kinases/antagonists & inhibitors/metabolism ; Ribosomes/metabolism ; Rotenone/pharmacology ; Signal Transduction ; Sirolimus/pharmacology ; TOR Serine-Threonine Kinases
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Phosphorylation and activation of p70s6k by PDK1 (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-02-21
    Description: Activation of the protein p70s6k by mitogens leads to increased translation of a family of messenger RNAs that encode essential components of the protein synthetic apparatus. Activation of the kinase requires hierarchical phosphorylation at multiple sites, culminating in the phosphorylation of the threonine in position 229 (Thr229), in the catalytic domain. The homologous site in protein kinase B (PKB), Thr308, has been shown to be phosphorylated by the phosphoinositide-dependent protein kinase PDK1. A regulatory link between p70s6k and PKB was demonstrated, as PDK1 was found to selectively phosphorylate p70s6k at Thr229. More importantly, PDK1 activated p70s6k in vitro and in vivo, whereas the catalytically inactive PDK1 blocked insulin-induced activation of p70s6k.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pullen, N -- Dennis, P B -- Andjelkovic, M -- Dufner, A -- Kozma, S C -- Hemmings, B A -- Thomas, G -- New York, N.Y. -- Science. 1998 Jan 30;279(5351):707-10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Friedrich Miescher Institute, Maulbeerstrasse 66, CH-4058, Basel, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9445476" target="_blank"〉PubMed〈/a〉
    Keywords: 3-Phosphoinositide-Dependent Protein Kinases ; Amino Acid Sequence ; Androstadienes/pharmacology ; Animals ; Binding Sites ; Calcium-Calmodulin-Dependent Protein Kinase Type 4 ; Calcium-Calmodulin-Dependent Protein Kinases/metabolism ; Catalysis ; Cell Line ; Enzyme Activation ; Insulin/pharmacology ; Insulin Antagonists/pharmacology ; Molecular Sequence Data ; Phosphorylation ; Phosphothreonine/metabolism ; Polyenes/pharmacology ; Protein-Serine-Threonine Kinases/*metabolism ; Proto-Oncogene Proteins/metabolism ; Proto-Oncogene Proteins c-akt ; Recombinant Proteins/metabolism ; Ribosomal Protein S6 Kinases/*metabolism ; Sirolimus
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Random heteropolymers preserve protein function in foreign environments (2018)
    American Association for the Advancement of Science (AAAS)
    In: Science
    Details
    Publication Date: 2018-03-16
    Description: The successful incorporation of active proteins into synthetic polymers could lead to a new class of materials with functions found only in living systems. However, proteins rarely function under the conditions suitable for polymer processing. On the basis of an analysis of trends in protein sequences and characteristic chemical patterns on protein surfaces, we designed four-monomer random heteropolymers to mimic intrinsically disordered proteins for protein solubilization and stabilization in non-native environments. The heteropolymers, with optimized composition and statistical monomer distribution, enable cell-free synthesis of membrane proteins with proper protein folding for transport and enzyme-containing plastics for toxin bioremediation. Controlling the statistical monomer distribution in a heteropolymer, rather than the specific monomer sequence, affords a new strategy to interface with biological systems for protein-based biomaterials.
    Keywords: Materials Science
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Geosciences , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
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    The principal target of rapamycin-induced p70s6k inactivation is a novel phosphorylation site within a conserved hydrophobic domain. (1995)
    EMBO Press
    Details
    Publication Date: 1995-11-01
    Print ISSN: 0261-4189
    Electronic ISSN: 1460-2075
    Topics: Biology , Medicine
    Published by EMBO Press on behalf of European Molecular Biology Organization.
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