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  • *Ecosystem  (97)
  • Protein Conformation  (93)
  • American Association for the Advancement of Science (AAAS)  (190)
  • Springer
  • 2005-2009  (157)
  • 1985-1989  (33)
  • 1960-1964
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  • 1
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    De novo computational design of retro-aldol enzymes (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-03-08
    Description: The creation of enzymes capable of catalyzing any desired chemical reaction is a grand challenge for computational protein design. Using new algorithms that rely on hashing techniques to construct active sites for multistep reactions, we designed retro-aldolases that use four different catalytic motifs to catalyze the breaking of a carbon-carbon bond in a nonnatural substrate. Of the 72 designs that were experimentally characterized, 32, spanning a range of protein folds, had detectable retro-aldolase activity. Designs that used an explicit water molecule to mediate proton shuffling were significantly more successful, with rate accelerations of up to four orders of magnitude and multiple turnovers, than those involving charged side-chain networks. The atomic accuracy of the design process was confirmed by the x-ray crystal structure of active designs embedded in two protein scaffolds, both of which were nearly superimposable on the design model.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3431203/" 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/PMC3431203/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jiang, Lin -- Althoff, Eric A -- Clemente, Fernando R -- Doyle, Lindsey -- Rothlisberger, Daniela -- Zanghellini, Alexandre -- Gallaher, Jasmine L -- Betker, Jamie L -- Tanaka, Fujie -- Barbas, Carlos F 3rd -- Hilvert, Donald -- Houk, Kendall N -- Stoddard, Barry L -- Baker, David -- R01 CA097328/CA/NCI NIH HHS/ -- R01 GM049857/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2008 Mar 7;319(5868):1387-91. doi: 10.1126/science.1152692.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, University of Washington, Seattle, WA 98195, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18323453" target="_blank"〉PubMed〈/a〉
    Keywords: Aldehyde-Lyases/*chemistry/metabolism ; *Algorithms ; Binding Sites ; Catalysis ; Catalytic Domain ; Computer Simulation ; Crystallography, X-Ray ; Hydrogen Bonding ; Hydrophobic and Hydrophilic Interactions ; Kinetics ; Models, Molecular ; Protein Conformation ; Protein Engineering
    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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    Drought sensitivity of the Amazon rainforest (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-03-07
    Description: Amazon forests are a key but poorly understood component of the global carbon cycle. If, as anticipated, they dry this century, they might accelerate climate change through carbon losses and changed surface energy balances. We used records from multiple long-term monitoring plots across Amazonia to assess forest responses to the intense 2005 drought, a possible analog of future events. Affected forest lost biomass, reversing a large long-term carbon sink, with the greatest impacts observed where the dry season was unusually intense. Relative to pre-2005 conditions, forest subjected to a 100-millimeter increase in water deficit lost 5.3 megagrams of aboveground biomass of carbon per hectare. The drought had a total biomass carbon impact of 1.2 to 1.6 petagrams (1.2 x 10(15) to 1.6 x 10(15) grams). Amazon forests therefore appear vulnerable to increasing moisture stress, with the potential for large carbon losses to exert feedback on climate change.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Phillips, Oliver L -- Aragao, Luiz E O C -- Lewis, Simon L -- Fisher, Joshua B -- Lloyd, Jon -- Lopez-Gonzalez, Gabriela -- Malhi, Yadvinder -- Monteagudo, Abel -- Peacock, Julie -- Quesada, Carlos A -- van der Heijden, Geertje -- Almeida, Samuel -- Amaral, Ieda -- Arroyo, Luzmila -- Aymard, Gerardo -- Baker, Tim R -- Banki, Olaf -- Blanc, Lilian -- Bonal, Damien -- Brando, Paulo -- Chave, Jerome -- de Oliveira, Atila Cristina Alves -- Cardozo, Nallaret Davila -- Czimczik, Claudia I -- Feldpausch, Ted R -- Freitas, Maria Aparecida -- Gloor, Emanuel -- Higuchi, Niro -- Jimenez, Eliana -- Lloyd, Gareth -- Meir, Patrick -- Mendoza, Casimiro -- Morel, Alexandra -- Neill, David A -- Nepstad, Daniel -- Patino, Sandra -- Penuela, Maria Cristina -- Prieto, Adriana -- Ramirez, Fredy -- Schwarz, Michael -- Silva, Javier -- Silveira, Marcos -- Thomas, Anne Sota -- Steege, Hans Ter -- Stropp, Juliana -- Vasquez, Rodolfo -- Zelazowski, Przemyslaw -- Alvarez Davila, Esteban -- Andelman, Sandy -- Andrade, Ana -- Chao, Kuo-Jung -- Erwin, Terry -- Di Fiore, Anthony -- Honorio C, Euridice -- Keeling, Helen -- Killeen, Tim J -- Laurance, William F -- Pena Cruz, Antonio -- Pitman, Nigel C A -- Nunez Vargas, Percy -- Ramirez-Angulo, Hirma -- Rudas, Agustin -- Salamao, Rafael -- Silva, Natalino -- Terborgh, John -- Torres-Lezama, Armando -- New York, N.Y. -- Science. 2009 Mar 6;323(5919):1344-7. doi: 10.1126/science.1164033.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Ecology and Global Change, School of Geography, University of Leeds, Leeds LS2 9JT, UK. o.phillips@leeds.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19265020" target="_blank"〉PubMed〈/a〉
    Keywords: Atmosphere ; *Biomass ; Brazil ; Carbon ; Carbon Dioxide ; Climate ; *Droughts ; *Ecosystem ; South America ; *Trees/growth & development ; Tropical Climate
    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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    Long-term sustainability of a high-energy, low-diversity crustal biome (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-10-21
    Description: Geochemical, microbiological, and molecular analyses of alkaline saline groundwater at 2.8 kilometers depth in Archaean metabasalt revealed a microbial biome dominated by a single phylotype affiliated with thermophilic sulfate reducers belonging to Firmicutes. These sulfate reducers were sustained by geologically produced sulfate and hydrogen at concentrations sufficient to maintain activities for millions of years with no apparent reliance on photosynthetically derived substrates.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lin, Li-Hung -- Wang, Pei-Ling -- Rumble, Douglas -- Lippmann-Pipke, Johanna -- Boice, Erik -- Pratt, Lisa M -- Sherwood Lollar, Barbara -- Brodie, Eoin L -- Hazen, Terry C -- Andersen, Gary L -- DeSantis, Todd Z -- Moser, Duane P -- Kershaw, Dave -- Onstott, T C -- New York, N.Y. -- Science. 2006 Oct 20;314(5798):479-82.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Geosciences, Princeton University, Princeton, NJ, USA. lhlin@ntu.edu.tw〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17053150" target="_blank"〉PubMed〈/a〉
    Keywords: Bacteria/classification/*isolation & purification/*metabolism ; Biodiversity ; DNA, Ribosomal/analysis/genetics ; *Ecosystem ; Gold ; Hydrogen/analysis/metabolism ; Mining ; Oligonucleotide Array Sequence Analysis ; Oxidation-Reduction ; Phylogeny ; RNA, Ribosomal, 16S/genetics ; South Africa ; Sulfates/*metabolism ; Temperature ; Thermodynamics ; Time ; *Water Microbiology
    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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    Environmental genomics reveals a single-species ecosystem deep within Earth (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-10-11
    Description: DNA from low-biodiversity fracture water collected at 2.8-kilometer depth in a South African gold mine was sequenced and assembled into a single, complete genome. This bacterium, Candidatus Desulforudis audaxviator, composes 〉99.9% of the microorganisms inhabiting the fluid phase of this particular fracture. Its genome indicates a motile, sporulating, sulfate-reducing, chemoautotrophic thermophile that can fix its own nitrogen and carbon by using machinery shared with archaea. Candidatus Desulforudis audaxviator is capable of an independent life-style well suited to long-term isolation from the photosphere deep within Earth's crust and offers an example of a natural ecosystem that appears to have its biological component entirely encoded within a single genome.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chivian, Dylan -- Brodie, Eoin L -- Alm, Eric J -- Culley, David E -- Dehal, Paramvir S -- DeSantis, Todd Z -- Gihring, Thomas M -- Lapidus, Alla -- Lin, Li-Hung -- Lowry, Stephen R -- Moser, Duane P -- Richardson, Paul M -- Southam, Gordon -- Wanger, Greg -- Pratt, Lisa M -- Andersen, Gary L -- Hazen, Terry C -- Brockman, Fred J -- Arkin, Adam P -- Onstott, Tullis C -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2008 Oct 10;322(5899):275-8. doi: 10.1126/science.1155495.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. DCChivian@lbl.gov〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18845759" target="_blank"〉PubMed〈/a〉
    Keywords: Ammonia/metabolism ; Carbon/metabolism ; *Ecosystem ; Genes, Bacterial ; *Genome, Bacterial ; Genomics/*methods ; Gold ; Mining ; Molecular Sequence Data ; Movement ; Oxidation-Reduction ; Peptococcaceae/classification/*genetics/growth & development/physiology ; Phylogeny ; Sequence Analysis, DNA ; South Africa ; Spores, Bacterial/physiology ; Sulfates/metabolism ; Temperature ; *Water Microbiology
    Print ISSN: 0036-8075
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  • 5
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    Global-scale similarities in nitrogen release patterns during long-term decomposition (2007)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2007-01-20
    Description: Litter decomposition provides the primary source of mineral nitrogen (N) for biological activity in most terrestrial ecosystems. A 10-year decomposition experiment in 21 sites from seven biomes found that net N release from leaf litter is dominantly driven by the initial tissue N concentration and mass remaining regardless of climate, edaphic conditions, or biota. Arid grasslands exposed to high ultraviolet radiation were an exception, where net N release was insensitive to initial N. Roots released N linearly with decomposition and exhibited little net N immobilization. We suggest that fundamental constraints on decomposer physiologies lead to predictable global-scale patterns in net N release during decomposition.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Parton, William -- Silver, Whendee L -- Burke, Ingrid C -- Grassens, Leo -- Harmon, Mark E -- Currie, William S -- King, Jennifer Y -- Adair, E Carol -- Brandt, Leslie A -- Hart, Stephen C -- Fasth, Becky -- New York, N.Y. -- Science. 2007 Jan 19;315(5810):361-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Natural Resource Ecology Laboratory, Colorado State University, 200 West Lake, Campus Mail 1499, Fort Collins, CO 80523-1499, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17234944" target="_blank"〉PubMed〈/a〉
    Keywords: *Biodegradation, Environmental ; Carbon/metabolism ; Climate ; *Ecosystem ; Humidity ; Mathematics ; Nitrogen/*metabolism ; Plant Leaves/metabolism ; Plant Roots/metabolism ; Plants/*metabolism ; Poaceae ; Regression Analysis ; Seasons ; Soil Microbiology ; Temperature ; Time Factors ; Trees
    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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  • 6
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    Variable control of Ets-1 DNA binding by multiple phosphates in an unstructured region (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-07-05
    Description: Cell signaling that culminates in posttranslational modifications directs protein activity. Here we report how multiple Ca2+-dependent phosphorylation sites within the transcription activator Ets-1 act additively to produce graded DNA binding affinity. Nuclear magnetic resonance spectroscopic analyses show that phosphorylation shifts Ets-1 from a dynamic conformation poised to bind DNA to a well-folded inhibited state. These phosphates lie in an unstructured flexible region that functions as the allosteric effector of autoinhibition. Variable phosphorylation thus serves as a "rheostat" for cell signaling to fine-tune transcription at the level of DNA binding.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pufall, Miles A -- Lee, Gregory M -- Nelson, Mary L -- Kang, Hyun-Seo -- Velyvis, Algirdas -- Kay, Lewis E -- McIntosh, Lawrence P -- Graves, Barbara J -- GM08537/GM/NIGMS NIH HHS/ -- P01-CA24014/CA/NCI NIH HHS/ -- R01 GM38663/GM/NIGMS NIH HHS/ -- T32-CA93247/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2005 Jul 1;309(5731):142-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Huntsman Cancer Institute, Department of Oncological Sciences, University of Utah, Salt Lake City, UT 84112-5550, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15994560" target="_blank"〉PubMed〈/a〉
    Keywords: Allosteric Regulation ; Amino Acid Sequence ; Amino Acid Substitution ; Animals ; Calcium-Calmodulin-Dependent Protein Kinase Type 2 ; Calcium-Calmodulin-Dependent Protein Kinases/metabolism ; DNA/*metabolism ; Hydrophobic and Hydrophilic Interactions ; Mice ; Models, Molecular ; Molecular Sequence Data ; Mutation ; Nuclear Magnetic Resonance, Biomolecular ; Phosphorylation ; Protein Binding ; Protein Conformation ; Protein Folding ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Proto-Oncogene Protein c-ets-1 ; Proto-Oncogene Proteins/*chemistry/genetics/*metabolism ; Proto-Oncogene Proteins c-ets ; Signal Transduction ; Transcription Factors/*chemistry/genetics/*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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  • 7
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    Assistance of microbial glycolipid antigen processing by CD1e (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-11-29
    Description: Complexes between CD1 molecules and self or microbial glycolipids represent important immunogenic ligands for specific subsets of T cells. However, the function of one of the CD1 family members, CD1e, has yet to be determined. Here, we show that the mycobacterial antigens hexamannosylated phosphatidyl-myo-inositols (PIM6) stimulate CD1b-restricted T cells only after partial digestion of the oligomannose moiety by lysosomal alpha-mannosidase and that soluble CD1e is required for this processing. Furthermore, recombinant CD1e was able to bind glycolipids and assist in the digestion of PIM6. We propose that, through this form of glycolipid editing, CD1e helps expand the repertoire of glycolipidic T cell antigens to optimize antimicrobial immune responses.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉de la Salle, Henri -- Mariotti, Sabrina -- Angenieux, Catherine -- Gilleron, Martine -- Garcia-Alles, Luis-Fernando -- Malm, Dag -- Berg, Thomas -- Paoletti, Samantha -- Maitre, Blandine -- Mourey, Lionel -- Salamero, Jean -- Cazenave, Jean Pierre -- Hanau, Daniel -- Mori, Lucia -- Puzo, Germain -- De Libero, Gennaro -- New York, N.Y. -- Science. 2005 Nov 25;310(5752):1321-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉INSERM, U725, Etablissement Francais du Sang-Alsace, F-67065 Strasbourg, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16311334" target="_blank"〉PubMed〈/a〉
    Keywords: Acylation ; *Antigen Presentation ; Antigen-Presenting Cells/immunology ; Antigens, Bacterial/*immunology/*metabolism ; Antigens, CD1/chemistry/genetics/immunology/*metabolism ; Cell Line, Tumor ; Dendritic Cells/enzymology/immunology ; Glycolipids/*immunology/metabolism ; Humans ; Hydrogen-Ion Concentration ; Lymphocyte Activation ; Models, Molecular ; Mycobacterium tuberculosis/immunology ; Phosphatidylinositols/*immunology/*metabolism ; Protein Conformation ; Recombinant Proteins/immunology/metabolism ; Solubility ; T-Lymphocytes/immunology ; Transfection ; alpha-Mannosidase/immunology
    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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  • 8
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    Environment: globalization of conservation: a view from the south (2007)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2007-08-11
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rodriguez, J P -- Taber, A B -- Daszak, P -- Sukumar, R -- Valladares-Padua, C -- Padua, S -- Aguirre, L F -- Medellin, R A -- Acosta, M -- Aguirre, A A -- Bonacic, C -- Bordino, P -- Bruschini, J -- Buchori, D -- Gonzalez, S -- Mathew, T -- Mendez, M -- Mugica, L -- Pacheco, L F -- Dobson, A P -- Pearl, M -- New York, N.Y. -- Science. 2007 Aug 10;317(5839):755-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Instituto Venezolano de Investigaciones Cientificas and PROVITA, Caracas, Venezuela.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17690278" target="_blank"〉PubMed〈/a〉
    Keywords: *Biodiversity ; *Conservation of Natural Resources ; Developed Countries ; Developing Countries ; *Ecosystem ; Environment ; *International Agencies/economics/organization & administration ; *International Cooperation ; Latin America
    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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  • 9
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    Structural basis of immune evasion at the site of CD4 attachment on HIV-1 gp120 (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-12-08
    Description: The site on HIV-1 gp120 that binds to the CD4 receptor is vulnerable to antibodies. However, most antibodies that interact with this site cannot neutralize HIV-1. To understand the basis of this resistance, we determined co-crystal structures for two poorly neutralizing, CD4-binding site (CD4BS) antibodies, F105 and b13, in complexes with gp120. Both antibodies exhibited approach angles to gp120 similar to those of CD4 and a rare, broadly neutralizing CD4BS antibody, b12. Slight differences in recognition, however, resulted in substantial differences in F105- and b13-bound conformations relative to b12-bound gp120. Modeling and binding experiments revealed these conformations to be poorly compatible with the viral spike. This incompatibility, the consequence of slight differences in CD4BS recognition, renders HIV-1 resistant to all but the most accurately targeted antibodies.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2862588/" 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/PMC2862588/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chen, Lei -- Kwon, Young Do -- Zhou, Tongqing -- Wu, Xueling -- O'Dell, Sijy -- Cavacini, Lisa -- Hessell, Ann J -- Pancera, Marie -- Tang, Min -- Xu, Ling -- Yang, Zhi-Yong -- Zhang, Mei-Yun -- Arthos, James -- Burton, Dennis R -- Dimitrov, Dimiter S -- Nabel, Gary J -- Posner, Marshall R -- Sodroski, Joseph -- Wyatt, Richard -- Mascola, John R -- Kwong, Peter D -- Z99 AI999999/Intramural NIH HHS/ -- New York, N.Y. -- Science. 2009 Nov 20;326(5956):1123-7. doi: 10.1126/science.1175868.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19965434" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Antibodies, Neutralizing/chemistry/*immunology/metabolism ; Antigens, CD4/chemistry/*metabolism ; Binding Sites ; Binding Sites, Antibody ; Crystallography, X-Ray ; Epitopes ; HIV Antibodies/*chemistry/*immunology/metabolism ; HIV Envelope Protein gp120/*chemistry/*immunology/metabolism ; Hiv-1 ; Humans ; Hydrophobic and Hydrophilic Interactions ; *Immune Evasion ; Models, Molecular ; Molecular Sequence Data ; Peptide Fragments/chemistry/immunology/metabolism ; Protein Conformation
    Print ISSN: 0036-8075
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  • 10
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    Comprehensive mapping of long-range interactions reveals folding principles of the human genome (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-10-10
    Description: We describe Hi-C, a method that probes the three-dimensional architecture of whole genomes by coupling proximity-based ligation with massively parallel sequencing. We constructed spatial proximity maps of the human genome with Hi-C at a resolution of 1 megabase. These maps confirm the presence of chromosome territories and the spatial proximity of small, gene-rich chromosomes. We identified an additional level of genome organization that is characterized by the spatial segregation of open and closed chromatin to form two genome-wide compartments. At the megabase scale, the chromatin conformation is consistent with a fractal globule, a knot-free, polymer conformation that enables maximally dense packing while preserving the ability to easily fold and unfold any genomic locus. The fractal globule is distinct from the more commonly used globular equilibrium model. Our results demonstrate the power of Hi-C to map the dynamic conformations of whole genomes.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2858594/" 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/PMC2858594/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lieberman-Aiden, Erez -- van Berkum, Nynke L -- Williams, Louise -- Imakaev, Maxim -- Ragoczy, Tobias -- Telling, Agnes -- Amit, Ido -- Lajoie, Bryan R -- Sabo, Peter J -- Dorschner, Michael O -- Sandstrom, Richard -- Bernstein, Bradley -- Bender, M A -- Groudine, Mark -- Gnirke, Andreas -- Stamatoyannopoulos, John -- Mirny, Leonid A -- Lander, Eric S -- Dekker, Job -- HG003143/HG/NHGRI NIH HHS/ -- R01 HG003143/HG/NHGRI NIH HHS/ -- R01 HG003143-06/HG/NHGRI NIH HHS/ -- R01HL06544/HL/NHLBI NIH HHS/ -- R37DK44746/DK/NIDDK NIH HHS/ -- T32 HG002295/HG/NHGRI NIH HHS/ -- U54HG004592/HG/NHGRI NIH HHS/ -- New York, N.Y. -- Science. 2009 Oct 9;326(5950):289-93. doi: 10.1126/science.1181369.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Broad Institute of Harvard and Massachusetts Institute of Technology (MIT), MA 02139, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19815776" target="_blank"〉PubMed〈/a〉
    Keywords: Biotin ; Cell Line, Transformed ; Cell Nucleus/*ultrastructure ; Chromatin/*chemistry ; Chromatin Immunoprecipitation ; *Chromosomes, Human/chemistry/ultrastructure ; Computational Biology ; DNA/*chemistry ; Gene Library ; *Genome, Human ; Humans ; In Situ Hybridization, Fluorescence ; Models, Molecular ; Monte Carlo Method ; Nucleic Acid Conformation ; Principal Component Analysis ; Protein Conformation ; Sequence Analysis, DNA
    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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