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  • Amino Acid Sequence  (5)
  • Condensed Matter: Electronic Properties, etc.  (4)
  • 1
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    Electronic Screening-Enhanced Hole Pairing in Two-Leg Spin Ladders Studied by High-Resolution Resonant Inelastic X-Ray Scattering at Cu M Edges (2014)
    American Physical Society (APS)
    Details
    Publication Date: 2014-08-05
    Description: Author(s): A. Rusydi, A. Goos, S. Binder, A. Eich, K. Botril, P. Abbamonte, X. Yu, M. B. H. Breese, H. Eisaki, Y. Fujimaki, S. Uchida, N. Guerassimova, R. Treusch, J. Feldhaus, R. Reininger, M. V. Klein, and M. Rübhausen We study the electronic screening mechanisms of the effective Coulomb on-site repulsion in hole-doped Sr14Cu24O41 compared to undoped La6Ca8Cu24O41 using polarization dependent high-resolution resonant inelastic x-ray scattering at Cu M edges. By measuring the energy of the effective Coulomb on-site... [Phys. Rev. Lett. 113, 067001] Published Mon Aug 04, 2014
    Keywords: Condensed Matter: Electronic Properties, etc.
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
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  • 2
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    gCap39, a calcium ion- and polyphosphoinositide-regulated actin capping protein (1990)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1990-12-07
    Description: The polymerization of actin filaments is involved in growth, movement, and cell division. It has been shown that actin polymerization is controlled by gelsolin, whose interactions with actin are activated by calcium ion (Ca2+) and inhibited by membrane polyphosphoinositides (PPI). A smaller Ca2(+)- and PPI-regulated protein, gCap39, which has 49% sequence identity with gelsolin, has been identified by cDNA cloning and protein purification. Like gelsolin, gCap39 binds to the fast-growing (+) end of actin filaments. However, gCap39 does not sever actin filaments and can respond to Ca2+ and PPI transients independently, under conditions in which gelsolin is ineffective. The coexistence of gCap39 with gelsolin should allow precise regulation of actin assembly at the leading edge of the cell.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yu, F X -- Johnston, P A -- Sudhof, T C -- Yin, H L -- HL 29113/HL/NHLBI NIH HHS/ -- HL 39644/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1990 Dec 7;250(4986):1413-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physiology, University of Texas Southwestern Medical Center, Dallas 75235-9040.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2255912" target="_blank"〉PubMed〈/a〉
    Keywords: Actins/*metabolism ; Amino Acid Sequence ; Animals ; Cell Line ; DNA/genetics/isolation & purification ; Gene Library ; Humans ; Kidney/metabolism ; Kinetics ; Macrophages/metabolism ; Mice ; Microfilament Proteins/genetics/isolation & purification/*metabolism ; Molecular Sequence Data ; *Nuclear Proteins ; Sequence Homology, Nucleic Acid
    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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    Ubiquitin-binding protein RAP80 mediates BRCA1-dependent DNA damage response (2007)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2007-05-26
    Description: Mutations in the breast cancer susceptibility gene 1 (BRCA1) are associated with an increased risk of breast and ovarian cancers. BRCA1 participates in the cellular DNA damage response. We report the identification of receptor-associated protein 80 (RAP80) as a BRCA1-interacting protein in humans. RAP80 contains a tandem ubiquitin-interacting motif domain, which is required for its binding with ubiquitin in vitro and its damage-induced foci formation in vivo. Moreover, RAP80 specifically recruits BRCA1 to DNA damage sites and functions with BRCA1 in G2/M checkpoint control. Together, these results suggest the existence of a ubiquitination-dependent signaling pathway involved in the DNA damage response.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kim, Hongtae -- Chen, Junjie -- Yu, Xiaochun -- R01CA089239/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2007 May 25;316(5828):1202-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Therapeutic Radiology, Yale University School of Medicine, Post Office Box 208040, New Haven, CT 06520, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17525342" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; BRCA1 Protein/*metabolism ; Carrier Proteins/*metabolism ; Cell Cycle ; Cell Line, Tumor ; DNA/*metabolism/radiation effects ; *DNA Damage ; DNA Repair/*physiology ; HeLa Cells ; Humans ; Molecular Sequence Data ; Nuclear Proteins/*metabolism ; Protein Binding ; Protein Structure, Tertiary ; RNA, Small Interfering ; Radiation, Ionizing ; Ubiquitin/*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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    Divergence of quaternary structures among bacterial flagellar filaments (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-04-19
    Description: It has been widely assumed that the atomic structure of the flagellar filament from Salmonella typhimurium serves as a model for all bacterial flagellar filaments given the sequence conservation in the coiled-coil regions responsible for polymerization. On the basis of electron microscopic images, we show that the flagellar filaments from Campylobacter jejuni have seven protofilaments rather than the 11 in S. typhimurium. The vertebrate Toll-like receptor 5 (TLR5) recognizes a region of bacterial flagellin that is involved in subunit-subunit assembly in Salmonella and many other pathogenic bacteria, and this short region has diverged in Campylobacter and related bacteria, such as Helicobacter pylori, which are not recognized by TLR5. The driving force in the change of quaternary structure between Salmonella and Campylobacter may have been the evasion of TLR5.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Galkin, Vitold E -- Yu, Xiong -- Bielnicki, Jakub -- Heuser, John -- Ewing, Cheryl P -- Guerry, Patricia -- Egelman, Edward H -- AI043559/AI/NIAID NIH HHS/ -- EB001567/EB/NIBIB NIH HHS/ -- New York, N.Y. -- Science. 2008 Apr 18;320(5874):382-5. doi: 10.1126/science.1155307.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Molecular Genetics, Box 800733, University of Virginia, Charlottesville, VA 22908-0733, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18420936" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Campylobacter jejuni/chemistry/genetics/*ultrastructure ; Cryoelectron Microscopy ; Evolution, Molecular ; Flagella/*chemistry/*ultrastructure ; Flagellin/*chemistry/genetics/immunology/metabolism ; Image Processing, Computer-Assisted ; Molecular Sequence Data ; Protein Structure, Quaternary ; Protein Structure, Tertiary ; Salmonella typhimurium/chemistry/*ultrastructure ; Toll-Like Receptor 5/immunology/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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    Photoexcited CRY2 interacts with CIB1 to regulate transcription and floral initiation in Arabidopsis (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-11-08
    Description: Cryptochromes (CRY) are photolyase-like blue-light receptors that mediate light responses in plants and animals. How plant cryptochromes act in response to blue light is not well understood. We report here the identification and characterization of the Arabidopsis CIB1 (cryptochrome-interacting basic-helix-loop-helix) protein. CIB1 interacts with CRY2 (cryptochrome 2) in a blue light-specific manner in yeast and Arabidopsis cells, and it acts together with additional CIB1-related proteins to promote CRY2-dependent floral initiation. CIB1 binds to G box (CACGTG) in vitro with a higher affinity than its interaction with other E-box elements (CANNTG). However, CIB1 stimulates FT messenger RNA expression, and it interacts with chromatin DNA of the FT gene that possesses various E-box elements except G box. We propose that the blue light-dependent interaction of cryptochrome(s) with CIB1 and CIB1-related proteins represents an early photoreceptor signaling mechanism in plants.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Liu, Hongtao -- Yu, Xuhong -- Li, Kunwu -- Klejnot, John -- Yang, Hongyun -- Lisiero, Dominique -- Lin, Chentao -- GM56265/GM/NIGMS NIH HHS/ -- R01 GM056265/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2008 Dec 5;322(5907):1535-9. doi: 10.1126/science.1163927. Epub 2008 Nov 6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, CA 90095, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18988809" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Arabidopsis/genetics/growth & development/*physiology ; Arabidopsis Proteins/chemistry/*genetics/*metabolism ; Basic Helix-Loop-Helix Transcription Factors/chemistry/genetics/*metabolism ; Cell Nucleus/metabolism ; Chromatin Immunoprecipitation ; Cryptochromes ; DNA-Binding Proteins/genetics/metabolism ; Flowers/*growth & development ; Gene Expression Regulation, Plant ; Light ; Molecular Sequence Data ; Mutant Proteins/chemistry/metabolism ; Plants, Genetically Modified ; Promoter Regions, Genetic ; Protein Binding ; RNA, Messenger/genetics/metabolism ; RNA, Plant/genetics/metabolism ; Signal Transduction ; Transcription Factors/genetics/metabolism ; *Transcription, Genetic ; Two-Hybrid System Techniques
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
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  • 6
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    Virology. A virus that infects a hyperthermophile encapsidates A-form DNA (2015)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2015-05-23
    Description: Extremophiles, microorganisms thriving in extreme environmental conditions, must have proteins and nucleic acids that are stable at extremes of temperature and pH. The nonenveloped, rod-shaped virus SIRV2 (Sulfolobus islandicus rod-shaped virus 2) infects the hyperthermophilic acidophile Sulfolobus islandicus, which lives at 80 degrees C and pH 3. We have used cryo-electron microscopy to generate a three-dimensional reconstruction of the SIRV2 virion at ~4 angstrom resolution, which revealed a previously unknown form of virion organization. Although almost half of the capsid protein is unstructured in solution, this unstructured region folds in the virion into a single extended alpha helix that wraps around the DNA. The DNA is entirely in the A-form, which suggests a common mechanism with bacterial spores for protecting DNA in the most adverse environments.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉DiMaio, Frank -- Yu, Xiong -- Rensen, Elena -- Krupovic, Mart -- Prangishvili, David -- Egelman, Edward H -- GM035269/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2015 May 22;348(6237):914-7. doi: 10.1126/science.aaa4181.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, University of Washington, Seattle, WA 98195, USA. ; Department of Biochemistry and Molecular Genetics, University of Virginia, Charlottesville, VA 22908, USA. ; Institut Pasteur, Department of Microbiology, 25 rue du Dr. Roux, Paris 75015, France. ; Institut Pasteur, Department of Microbiology, 25 rue du Dr. Roux, Paris 75015, France. egelman@virginia.edu david.prangishvili@pasteur.fr. ; Department of Biochemistry and Molecular Genetics, University of Virginia, Charlottesville, VA 22908, USA. egelman@virginia.edu david.prangishvili@pasteur.fr.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25999507" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Cryoelectron Microscopy ; DNA, A-Form/*metabolism ; Molecular Sequence Data ; Protein Multimerization ; Protein Structure, Secondary ; Rudiviridae/*metabolism/ultrastructure ; Spores, Bacterial/genetics/virology ; Sulfolobus/*genetics/*virology ; Virion/*ultrastructure
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
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  • 7
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    Quantum Phase Diffusion in a Small Underdamped Josephson Junction (2011)
    American Physical Society (APS)
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    Publication Date: 2011-08-04
    Description: Author(s): H. F. Yu, X. B. Zhu, Z. H. Peng, Ye Tian, D. J. Cui, G. H. Chen, D. N. Zheng, X. N. Jing, Li Lu, S. P. Zhao, and Siyuan Han Quantum phase diffusion in a small underdamped Nb/AlO x /Nb junction ( ∼0.4   μ m 2 ) is demonstrated in a wide temperature range of 25–140 mK where macroscopic quantum tunneling (MQT) is the dominant escape mechanism. We propose a two-step transition model to describe the switching process in which the es... [Phys. Rev. Lett. 107, 067004] Published Wed Aug 03, 2011
    Keywords: Condensed Matter: Electronic Properties, etc.
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
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  • 8
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    Absence of Magnetic Thermal Conductivity in the Quantum Spin-Liquid Candidate YbMgGaO_{4} (2016)
    American Physical Society (APS)
    Details
    Publication Date: 2016-12-28
    Description: Author(s): Y. Xu, J. Zhang, Y. S. Li, Y. J. Yu, X. C. Hong, Q. M. Zhang, and S. Y. Li We present the ultralow-temperature specific heat and thermal conductivity measurements on single crystals of YbMgGaO 4 , which was recently argued to be a promising candidate for a quantum spin liquid (QSL). In a zero magnetic field, a large magnetic contribution of specific heat is observed, and exh… [Phys. Rev. Lett. 117, 267202] Published Fri Dec 23, 2016
    Keywords: Condensed Matter: Electronic Properties, etc.
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
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  • 9
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    Magnetoplasmons in Quasineutral Epitaxial Graphene Nanoribbons (2013)
    American Physical Society (APS)
    Details
    Publication Date: 2013-06-14
    Description: Author(s): J. M. Poumirol, W. Yu, X. Chen, C. Berger, W. A. de Heer, M. L. Smith, T. Ohta, W. Pan, M. O. Goerbig, D. Smirnov, and Z. Jiang We present an infrared transmission spectroscopy study of the inter-Landau-level excitations in quasineutral epitaxial graphene nanoribbon arrays. We observed a substantial deviation in energy of the L 0(-1) → L 1(0) transition from the characteristic square root magnetic-field dependence of two-dimensi... [Phys. Rev. Lett. 110, 246803] Published Thu Jun 13, 2013
    Keywords: Condensed Matter: Electronic Properties, etc.
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    Electronic ISSN: 1079-7114
    Topics: Physics
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