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  • *Biological Evolution  (69)
  • Protein Conformation  (57)
  • American Association for the Advancement of Science (AAAS)  (126)
  • Blackwell Publishing Ltd
  • Molecular Diversity Preservation International
  • Springer
  • 2015-2019
  • 2000-2004  (126)
  • 2004  (126)
Collection
Keywords
Publisher
  • American Association for the Advancement of Science (AAAS)  (126)
  • Blackwell Publishing Ltd
  • Molecular Diversity Preservation International
  • Springer
Years
  • 2015-2019
  • 2000-2004  (126)
Year
  • 1
    Publication Date: 2004-06-05
    Description: The mechanisms by which hydrophobic molecules, such as long-chain fatty acids, enter cells are poorly understood. In Gram-negative bacteria, the lipopolysaccharide layer in the outer membrane is an efficient barrier for fatty acids and aromatic hydrocarbons destined for biodegradation. We report crystal structures of the long-chain fatty acid transporter FadL from Escherichia coli at 2.6 and 2.8 angstrom resolution. FadL forms a 14-stranded beta barrel that is occluded by a central hatch domain. The structures suggest that hydrophobic compounds bind to multiple sites in FadL and use a transport mechanism that involves spontaneous conformational changes in the hatch.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉van den Berg, Bert -- Black, Paul N -- Clemons, William M Jr -- Rapoport, Tom A -- New York, N.Y. -- Science. 2004 Jun 4;304(5676):1506-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute and Department of Cell Biology, Harvard Medical School, 240 Longwood Avenue, Boston, MA 02115, USA. lvandenberg@hms.harvard.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15178802" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Bacterial Outer Membrane Proteins/*chemistry/metabolism ; Binding Sites ; Biological Transport ; Crystallization ; Crystallography, X-Ray ; Escherichia coli/chemistry/metabolism ; Escherichia coli Proteins/*chemistry/metabolism ; Fatty Acid Transport Proteins ; Fatty Acids/*metabolism ; Hydrogen Bonding ; Hydrophobic and Hydrophilic Interactions ; Models, Biological ; Models, Molecular ; Molecular Sequence Data ; Protein Conformation ; Protein Structure, Secondary ; Protein Structure, Tertiary
    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
    Publication Date: 2004-10-02
    Description: Over the past 50 million years, successive clades of large carnivorous mammals diversified and then declined to extinction. In most instances, the cause of the decline remains a puzzle. Here we argue that energetic constraints and pervasive selection for larger size (Cope's rule) in carnivores lead to dietary specialization (hypercarnivory) and increased vulnerability to extinction. In two major clades of extinct North American canids, the evolution of large size was associated with a dietary shift to hypercarnivory and a decline in species durations. Thus, selection for attributes that promoted individual success resulted in progressive evolutionary failure of their clades.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Van Valkenburgh, Blaire -- Wang, Xiaoming -- Damuth, John -- New York, N.Y. -- Science. 2004 Oct 1;306(5693):101-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Ecology and Evolutionary Biology, University of California at Los Angeles, Los Angeles, CA 90095-1606, USA. bvanval@ucla.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15459388" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biological Evolution ; Body Constitution ; Body Weight ; *Carnivora/anatomy & histology/classification/physiology ; Cuspid/anatomy & histology ; *Diet ; *Fossils ; Incisor/anatomy & histology ; Jaw/anatomy & histology ; Molar/anatomy & histology ; North America ; Paleodontology ; Population Density ; Population Dynamics ; Predatory Behavior ; Principal Component Analysis ; Selection, 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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  • 3
    Publication Date: 2004-01-06
    Description: MDM2 binds the p53 tumor suppressor protein with high affinity and negatively modulates its transcriptional activity and stability. Overexpression of MDM2, found in many human tumors, effectively impairs p53 function. Inhibition of MDM2-p53 interaction can stabilize p53 and may offer a novel strategy for cancer therapy. Here, we identify potent and selective small-molecule antagonists of MDM2 and confirm their mode of action through the crystal structures of complexes. These compounds bind MDM2 in the p53-binding pocket and activate the p53 pathway in cancer cells, leading to cell cycle arrest, apoptosis, and growth inhibition of human tumor xenografts in nude mice.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vassilev, Lyubomir T -- Vu, Binh T -- Graves, Bradford -- Carvajal, Daisy -- Podlaski, Frank -- Filipovic, Zoran -- Kong, Norman -- Kammlott, Ursula -- Lukacs, Christine -- Klein, Christian -- Fotouhi, Nader -- Liu, Emily A -- New York, N.Y. -- Science. 2004 Feb 6;303(5659):844-8. Epub 2004 Jan 2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Discovery Oncology, Roche Research Center, Hoffmann-La Roche, Inc., Nutley, NJ 07110, USA. lyubomir.vassilev@roche.com〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14704432" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Apoptosis/*drug effects ; Binding Sites ; Cell Cycle/drug effects ; Cell Division/*drug effects ; Cell Line ; Cell Line, Tumor ; Cell Survival/drug effects ; Crystallization ; Crystallography, X-Ray ; Cyclin-Dependent Kinase Inhibitor p21 ; Cyclins/metabolism ; Dose-Response Relationship, Drug ; Gene Expression ; Genes, p53 ; Humans ; Hydrophobic and Hydrophilic Interactions ; Imidazoles/chemistry/metabolism/*pharmacology ; Mice ; Mice, Nude ; Models, Molecular ; Molecular Weight ; NIH 3T3 Cells ; Neoplasm Transplantation ; Neoplasms, Experimental/drug therapy/metabolism/*pathology ; *Nuclear Proteins ; Phosphorylation ; Piperazines/chemistry/metabolism/*pharmacology ; Protein Conformation ; Proto-Oncogene Proteins/*antagonists & inhibitors/chemistry/metabolism ; Proto-Oncogene Proteins c-mdm2 ; Stereoisomerism ; Transplantation, Heterologous ; Tumor Suppressor Protein p53/*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
    Publication Date: 2004-11-30
    Description: Polycomb group proteins preserve body patterning through development by maintaining transcriptional silencing of homeotic genes. A long-standing hypothesis is that silencing involves creating chromatin structure that is repressive to gene transcription. We demonstrate by electron microscopy that core components of Polycomb Repressive Complex 1 induce compaction of defined nucleosomal arrays. Compaction by Polycomb proteins requires nucleosomes but not histone tails. Each Polycomb complex can compact about three nucleosomes. A region of Posterior Sex Combs that is important for gene silencing in vivo is also important for chromatin compaction, linking the two activities. This mechanism of chromatin compaction might be central to stable gene silencing by the Polycomb group.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Francis, Nicole J -- Kingston, Robert E -- Woodcock, Christopher L -- GM43786/GM/NIGMS NIH HHS/ -- NIH-P41-RR01777/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 2004 Nov 26;306(5701):1574-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology, Massachusetts General Hospital, Boston, MA 02114, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15567868" target="_blank"〉PubMed〈/a〉
    Keywords: Chromatin/*chemistry/metabolism/ultrastructure ; DNA/*chemistry/metabolism ; Gene Expression Regulation ; Gene Silencing ; HeLa Cells ; Histones/*chemistry/metabolism ; Humans ; Microscopy, Electron ; Microscopy, Electron, Scanning ; Nucleosomes/*chemistry/metabolism/ultrastructure ; Polycomb-Group Proteins ; Protein Conformation ; Repressor Proteins/*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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  • 5
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2004-12-25
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pennisi, Elizabeth -- New York, N.Y. -- Science. 2004 Dec 24;306(5705):2172.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15618495" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biological Evolution ; Breeding ; Dogs/*anatomy & histology/*genetics/growth & development ; Genetic Variation ; Hindlimb ; Neoplasm Proteins/genetics ; Nose/anatomy & histology ; Phenotype ; Selection, Genetic ; Skull/anatomy & histology ; *Tandem Repeat Sequences ; Toes/anatomy & histology ; Transcription Factors/genetics
    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
    Publication Date: 2004-10-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pennisi, Elizabeth -- New York, N.Y. -- Science. 2004 Oct 29;306(5697):796-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15514125" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biological Evolution ; Brain/cytology ; Circadian Rhythm ; *Eye ; Gene Duplication ; Genome ; Homeodomain Proteins/*analysis ; Humans ; Light ; Photoreceptor Cells, Invertebrate/chemistry/*cytology ; Photoreceptor Cells, Vertebrate/chemistry/cytology ; Polychaeta/chemistry/*cytology/*genetics ; Retinal Ganglion Cells/cytology ; Rod Opsins/analysis/*chemistry/*genetics
    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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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2004-05-08
    Description: I report on tiny skeletons of stem-group hummingbirds from the early Oligocene of Germany that are of essentially modern appearance and exhibit morphological specializations toward nectarivory and hovering flight. These are the oldest fossils of modern-type hummingbirds, which had not previously been reported from the Old World. The findings demonstrate that early hummingbird evolution was not restricted to the New World. They further suggest that bird-flower coevolution dates back to the early Oligocene and open another view on the origin of ornithophily in Old World plants.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mayr, Gerald -- New York, N.Y. -- Science. 2004 May 7;304(5672):861-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Forschungsinstitut Senckenberg, Division of Ornithology, Senckenberganlage 25, D-60325 Frankfurt a.M., Germany. Gerald.Mayr@senckenberg.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15131303" target="_blank"〉PubMed〈/a〉
    Keywords: Americas ; Animals ; *Biological Evolution ; *Birds/anatomy & histology/classification ; Bone and Bones/anatomy & histology ; Europe ; Flight, Animal ; Flowers ; *Fossils ; Germany
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 8
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2004-07-03
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pennisi, Elizabeth -- New York, N.Y. -- Science. 2004 Jul 2;305(5680):37.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15232086" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Awards and Prizes ; Berlin ; *Biological Evolution ; Biology/history ; Birds ; History, 20th Century ; History, 21st Century ; Museums/*history ; United States
    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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  • 9
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2004-06-19
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pennisi, Elizabeth -- New York, N.Y. -- Science. 2004 Jun 18;304(5678):1736.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15205506" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptation, Biological ; Alleles ; Animals ; *Biological Evolution ; Breeding ; Crosses, Genetic ; Environment ; Extremities/growth & development ; Fresh Water ; Gene Expression Regulation ; Genes ; Genome ; Homeodomain Proteins/*genetics/metabolism ; Mutation ; Paired Box Transcription Factors ; Seawater ; Selection, Genetic ; Smegmamorpha/*anatomy & histology/*genetics ; Transcription Factors/*genetics/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 10
    Publication Date: 2004-02-07
    Description: The 1918 influenza pandemic resulted in about 20 million deaths. This enormous impact, coupled with renewed interest in emerging infections, makes characterization of the virus involved a priority. Receptor binding, the initial event in virus infection, is a major determinant of virus transmissibility that, for influenza viruses, is mediated by the hemagglutinin (HA) membrane glycoprotein. We have determined the crystal structures of the HA from the 1918 virus and two closely related HAs in complex with receptor analogs. They explain how the 1918 HA, while retaining receptor binding site amino acids characteristic of an avian precursor HA, is able to bind human receptors and how, as a consequence, the virus was able to spread in the human population.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gamblin, S J -- Haire, L F -- Russell, R J -- Stevens, D J -- Xiao, B -- Ha, Y -- Vasisht, N -- Steinhauer, D A -- Daniels, R S -- Elliot, A -- Wiley, D C -- Skehel, J J -- AI-13654/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2004 Mar 19;303(5665):1838-42. Epub 2004 Feb 5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Medical Research Council (MRC) National Institute for Medical Research, The Ridgeway, Mill Hill, London NW7 1AA, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14764886" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Binding Sites ; Birds ; Crystallography, X-Ray ; Hemagglutinin Glycoproteins, Influenza Virus/*chemistry/*metabolism ; History, 20th Century ; Humans ; Hydrogen Bonding ; Influenza A virus/*immunology/metabolism/pathogenicity ; Influenza, Human/epidemiology/history/*virology ; Membrane Glycoproteins/chemistry/metabolism ; Models, Molecular ; Molecular Sequence Data ; Protein Conformation ; Protein Structure, Tertiary ; Receptors, Virus/*metabolism ; Sequence Alignment ; Sialic Acids/metabolism ; Species Specificity ; Swine
    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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