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  • Models, Biological  (417)
  • *Federal Government  (398)
  • Chemistry
  • General Chemistry
  • ddc:330
  • Nature Publishing Group (NPG)  (830)
  • 1
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    Embryonic stem cells: don't let litigation put research off limits (2010)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2010-09-17
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Feng, Jian -- England -- Nature. 2010 Sep 16;467(7313):271. doi: 10.1038/467271a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20844517" target="_blank"〉PubMed〈/a〉
    Keywords: Embryo Research/economics/ethics/*legislation & jurisprudence ; *Embryonic Stem Cells ; *Federal Government ; Financing, Government/*legislation & jurisprudence ; Humans ; *Religion and Science ; Research Support as Topic/*legislation & jurisprudence ; United States ; Zygote/cytology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 2
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    Palaeontology: Muddy tetrapod origins (2010)
    Nature Publishing Group (NPG)
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    Publication Date: 2010-01-08
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Janvier, Philippe -- Clement, Gael -- England -- Nature. 2010 Jan 7;463(7277):40-1. doi: 10.1038/463040a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20054387" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biological Evolution ; Chordata/anatomy & histology/classification/*physiology ; Extremities/anatomy & histology/physiology ; Fishes/anatomy & histology/physiology ; *Fossils ; Gait/physiology ; History, Ancient ; Models, Biological ; Phylogeny ; Poland
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 3
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    The key nickel enzyme of methanogenesis catalyses the anaerobic oxidation of methane (2010)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2010-06-04
    Description: Large amounts (estimates range from 70 Tg per year to 300 Tg per year) of the potent greenhouse gas methane are oxidized to carbon dioxide in marine sediments by communities of methanotrophic archaea and sulphate-reducing bacteria, and thus are prevented from escaping into the atmosphere. Indirect evidence indicates that the anaerobic oxidation of methane might proceed as the reverse of archaeal methanogenesis from carbon dioxide with the nickel-containing methyl-coenzyme M reductase (MCR) as the methane-activating enzyme. However, experiments showing that MCR can catalyse the endergonic back reaction have been lacking. Here we report that purified MCR from Methanothermobacter marburgensis converts methane into methyl-coenzyme M under equilibrium conditions with apparent V(max) (maximum rate) and K(m) (Michaelis constant) values consistent with the observed in vivo kinetics of the anaerobic oxidation of methane with sulphate. This result supports the hypothesis of 'reverse methanogenesis' and is paramount to understanding the still-unknown mechanism of the last step of methanogenesis. The ability of MCR to cleave the particularly strong C-H bond of methane without the involvement of highly reactive oxygen-derived intermediates is directly relevant to catalytic C-H activation, currently an area of great interest in chemistry.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Scheller, Silvan -- Goenrich, Meike -- Boecher, Reinhard -- Thauer, Rudolf K -- Jaun, Bernhard -- England -- Nature. 2010 Jun 3;465(7298):606-8. doi: 10.1038/nature09015.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Organic Chemistry, ETH Zurich, Wolfgang-Pauli-Str. 10, 8093 Zurich, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20520712" target="_blank"〉PubMed〈/a〉
    Keywords: Anaerobiosis ; *Biocatalysis ; Gases/metabolism ; Kinetics ; Mesna/analogs & derivatives/metabolism ; Methane/*biosynthesis/*metabolism ; Methanobacteriaceae/*enzymology ; Methylation ; Models, Biological ; Nickel/*metabolism ; Oxidation-Reduction ; Oxidoreductases/*metabolism ; Temperature
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 4
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    A systems approach (2010)
    Nature Publishing Group (NPG)
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    Publication Date: 2010-05-27
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chi, Kelly Rae -- England -- Nature. 2010 Apr 15;464(7291):1090-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20503480" target="_blank"〉PubMed〈/a〉
    Keywords: Breast Neoplasms/genetics/metabolism/pathology/therapy ; Computational Biology/education/manpower/trends ; Female ; Genetic Heterogeneity ; Humans ; Models, Biological ; Neoplasms/genetics/*metabolism/*pathology/therapy ; Research Personnel/education ; Systems Biology/education/manpower/*trends
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 5
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    Thousands of chemical starting points for antimalarial lead identification (2010)
    Nature Publishing Group (NPG)
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    Publication Date: 2010-05-21
    Description: Malaria is a devastating infection caused by protozoa of the genus Plasmodium. Drug resistance is widespread, no new chemical class of antimalarials has been introduced into clinical practice since 1996 and there is a recent rise of parasite strains with reduced sensitivity to the newest drugs. We screened nearly 2 million compounds in GlaxoSmithKline's chemical library for inhibitors of P. falciparum, of which 13,533 were confirmed to inhibit parasite growth by at least 80% at 2 microM concentration. More than 8,000 also showed potent activity against the multidrug resistant strain Dd2. Most (82%) compounds originate from internal company projects and are new to the malaria community. Analyses using historic assay data suggest several novel mechanisms of antimalarial action, such as inhibition of protein kinases and host-pathogen interaction related targets. Chemical structures and associated data are hereby made public to encourage additional drug lead identification efforts and further research into this disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gamo, Francisco-Javier -- Sanz, Laura M -- Vidal, Jaume -- de Cozar, Cristina -- Alvarez, Emilio -- Lavandera, Jose-Luis -- Vanderwall, Dana E -- Green, Darren V S -- Kumar, Vinod -- Hasan, Samiul -- Brown, James R -- Peishoff, Catherine E -- Cardon, Lon R -- Garcia-Bustos, Jose F -- England -- Nature. 2010 May 20;465(7296):305-10. doi: 10.1038/nature09107.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Tres Cantos Medicines Development Campus, GlaxoSmithKline, Severo Ochoa 2, 28760 Tres Cantos, Spain.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20485427" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antimalarials/*analysis/chemistry/*pharmacology/toxicity ; Cell Line, Tumor ; *Drug Discovery ; Drug Resistance, Multiple/drug effects ; Humans ; Malaria, Falciparum/*drug therapy/parasitology ; Models, Biological ; Phylogeny ; Plasmodium falciparum/*drug effects/enzymology/genetics/growth & development ; Small Molecule Libraries/*analysis/chemistry/*pharmacology/toxicity
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 6
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    Cancer: Genomic evolution of metastasis (2010)
    Nature Publishing Group (NPG)
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    Publication Date: 2010-10-29
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Luebeck, E Georg -- England -- Nature. 2010 Oct 28;467(7319):1053-5. doi: 10.1038/4671053a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20981088" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Lineage/genetics ; Clone Cells/metabolism/pathology ; DNA Mutational Analysis ; Disease Progression ; Early Detection of Cancer ; *Evolution, Molecular ; Genomic Instability/*genetics ; Humans ; Models, Biological ; Mutagenesis/*genetics ; Neoplasm Metastasis/*genetics/pathology ; Pancreatic Neoplasms/classification/*genetics/*pathology ; Time Factors
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 7
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    The killing fields (2010)
    Nature Publishing Group (NPG)
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    Publication Date: 2010-09-25
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉England -- Nature. 2010 Sep 23;467(7314):368. doi: 10.1038/467368a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20864950" target="_blank"〉PubMed〈/a〉
    Keywords: Agriculture/*methods ; Animals ; Cattle ; Disease Reservoirs/microbiology/*statistics & numerical data/*veterinary ; *Federal Government ; Great Britain/epidemiology ; *Mustelidae/microbiology ; Reproducibility of Results ; Tuberculosis Vaccines ; Tuberculosis, Bovine/epidemiology/*prevention & control/transmission ; Vaccination/veterinary
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 8
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    NINJA connects the co-repressor TOPLESS to jasmonate signalling (2010)
    Nature Publishing Group (NPG)
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    Publication Date: 2010-04-03
    Description: Jasmonoyl-isoleucine (JA-Ile) is a plant hormone that regulates a broad array of plant defence and developmental processes. JA-Ile-responsive gene expression is regulated by the transcriptional activator MYC2 that interacts physically with the jasmonate ZIM-domain (JAZ) repressor proteins. On perception of JA-Ile, JAZ proteins are degraded and JA-Ile-dependent gene expression is activated. The molecular mechanisms by which JAZ proteins repress gene expression remain unknown. Here we show that the Arabidopsis JAZ proteins recruit the Groucho/Tup1-type co-repressor TOPLESS (TPL) and TPL-related proteins (TPRs) through a previously uncharacterized adaptor protein, designated Novel Interactor of JAZ (NINJA). NINJA acts as a transcriptional repressor whose activity is mediated by a functional TPL-binding EAR repression motif. Accordingly, both NINJA and TPL proteins function as negative regulators of jasmonate responses. Our results point to TPL proteins as general co-repressors that affect multiple signalling pathways through the interaction with specific adaptor proteins. This new insight reveals how stress-related and growth-related signalling cascades use common molecular mechanisms to regulate gene expression in plants.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2849182/" 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/PMC2849182/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pauwels, Laurens -- Barbero, Gemma Fernandez -- Geerinck, Jan -- Tilleman, Sofie -- Grunewald, Wim -- Perez, Amparo Cuellar -- Chico, Jose Manuel -- Bossche, Robin Vanden -- Sewell, Jared -- Gil, Eduardo -- Garcia-Casado, Gloria -- Witters, Erwin -- Inze, Dirk -- Long, Jeff A -- De Jaeger, Geert -- Solano, Roberto -- Goossens, Alain -- R01 GM072764/GM/NIGMS NIH HHS/ -- R01 GM072764-06/GM/NIGMS NIH HHS/ -- England -- Nature. 2010 Apr 1;464(7289):788-91. doi: 10.1038/nature08854.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Plant Systems Biology, Flanders Institute for Biotechnology (VIB), Technologiepark 927, B-9052 Gent, Belgium.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20360743" target="_blank"〉PubMed〈/a〉
    Keywords: Arabidopsis/cytology/*drug effects/*metabolism ; Arabidopsis Proteins/genetics/*metabolism ; Cyclopentanes/antagonists & inhibitors/*pharmacology ; Gene Expression Profiling ; Gene Expression Regulation, Plant ; Models, Biological ; Oxylipins/antagonists & inhibitors/*pharmacology ; Plants, Genetically Modified ; Protein Binding ; Repressor Proteins/genetics/*metabolism ; Signal Transduction/*drug effects ; Two-Hybrid System Techniques
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  • 9
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    Evolutionary biology: Oh sibling, who art thou? (2010)
    Nature Publishing Group (NPG)
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    Publication Date: 2010-08-21
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cockburn, Andrew -- England -- Nature. 2010 Aug 19;466(7309):930-1. doi: 10.1038/466930a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20725030" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biological Evolution ; Birds/classification/genetics/*physiology ; *Cooperative Behavior ; Fathers ; Female ; Male ; Models, Biological ; Mothers ; Phylogeny ; Reproduction/genetics/physiology ; Sexual Behavior, Animal/*physiology ; *Siblings
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 10
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    RAF inhibitors transactivate RAF dimers and ERK signalling in cells with wild-type BRAF (2010)
    Nature Publishing Group (NPG)
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    Publication Date: 2010-02-25
    Description: Tumours with mutant BRAF are dependent on the RAF-MEK-ERK signalling pathway for their growth. We found that ATP-competitive RAF inhibitors inhibit ERK signalling in cells with mutant BRAF, but unexpectedly enhance signalling in cells with wild-type BRAF. Here we demonstrate the mechanistic basis for these findings. We used chemical genetic methods to show that drug-mediated transactivation of RAF dimers is responsible for paradoxical activation of the enzyme by inhibitors. Induction of ERK signalling requires direct binding of the drug to the ATP-binding site of one kinase of the dimer and is dependent on RAS activity. Drug binding to one member of RAF homodimers (CRAF-CRAF) or heterodimers (CRAF-BRAF) inhibits one protomer, but results in transactivation of the drug-free protomer. In BRAF(V600E) tumours, RAS is not activated, thus transactivation is minimal and ERK signalling is inhibited in cells exposed to RAF inhibitors. These results indicate that RAF inhibitors will be effective in tumours in which BRAF is mutated. Furthermore, because RAF inhibitors do not inhibit ERK signalling in other cells, the model predicts that they would have a higher therapeutic index and greater antitumour activity than mitogen-activated protein kinase (MEK) inhibitors, but could also cause toxicity due to MEK/ERK activation. These predictions have been borne out in a recent clinical trial of the RAF inhibitor PLX4032 (refs 4, 5). The model indicates that promotion of RAF dimerization by elevation of wild-type RAF expression or RAS activity could lead to drug resistance in mutant BRAF tumours. In agreement with this prediction, RAF inhibitors do not inhibit ERK signalling in cells that coexpress BRAF(V600E) and mutant RAS.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3178447/" 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/PMC3178447/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Poulikakos, Poulikos I -- Zhang, Chao -- Bollag, Gideon -- Shokat, Kevan M -- Rosen, Neal -- 1P01CA129243-02/CA/NCI NIH HHS/ -- 2R01EB001987/EB/NIBIB NIH HHS/ -- P01 CA129243-010002/CA/NCI NIH HHS/ -- R01 EB001987/EB/NIBIB NIH HHS/ -- U01 CA091178/CA/NCI NIH HHS/ -- U01 CA091178-01/CA/NCI NIH HHS/ -- England -- Nature. 2010 Mar 18;464(7287):427-30. doi: 10.1038/nature08902.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Program in Molecular Pharmacology and Chemistry and Department of Medicine, Memorial Sloan-Kettering Cancer Center, New York, New York 10065, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20179705" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphate/metabolism ; Animals ; Catalytic Domain ; Cell Line ; Cell Line, Tumor ; Enzyme Activation/drug effects ; Extracellular Signal-Regulated MAP Kinases/*metabolism ; Humans ; Indoles/pharmacology ; MAP Kinase Signaling System/*drug effects ; Mice ; Mitogen-Activated Protein Kinase Kinases/metabolism ; Models, Biological ; Neoplasms/drug therapy/enzymology/genetics/metabolism ; Phosphorylation ; Protein Binding ; Protein Kinase Inhibitors/metabolism/*pharmacology/therapeutic use ; Protein Multimerization ; Proto-Oncogene Proteins B-raf/antagonists & ; inhibitors/chemistry/genetics/*metabolism ; Sulfonamides/pharmacology ; Transcriptional Activation/*drug effects ; raf Kinases/*antagonists & inhibitors/chemistry/genetics/*metabolism ; ras Proteins/genetics/metabolism
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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