ALBERT

Description: We measured the electrical conductivity σ of aluminum specimen consisting of submicron-grains by observing the AC magnetic susceptibility resulting from the eddy current. By using a commercial platform for magnetic measurement, contactless measurement of the relative electrical conductivity σ n of a nonmagnetic metal is possible over a wide temperature ( T ) range. By referring to σ at room temperature, obtained by the four-terminal method, σ n ( T ) was transformed into σ ( T ). This approach is useful for cylinder specimens, in which the estimation of the radius and/or volume is difficult. An experiment in which aluminum underwent accumulative roll bonding, which is a severe plastic deformation process, validated this method of evaluating σ as a function of the fraction of high-angle grain boundaries.

Description: Mechanisms underlying age-related obesity and insulin resistance are generally unknown. Here, we report age-related adipose vascular changes markedly modulated fat mass, adipocyte functions, blood lipid composition, and insulin sensitivity. Notably, VEGF expression levels in various white adipose tissues (WATs) underwent changes uninterruptedly in different age populations. Anti-VEGF and anti- VEGF...

Description: In contrast to carbon, silicon does not readily form double bonds, and compounds containing silicon-silicon double bonds can usually be stabilized only by protection with bulky substituents. We have isolated a silicon analog of spiropentadiene 1, a carbon double-ring compound that has not been isolated to date. In the crystal structure of tetrakis[tri(t-butyldimethylsilyl)silyl]spiropentasiladiene 2, a substantial deviation from the perpendicular arrangement of the two rings is observed, and the silicon-silicon double bonds are shown to be distorted. Spectroscopic data indicate pronounced interaction between two remote silicon-silicon double bonds in the molecule. Silicon-silicon bonds may be more accessible to synthesis than previously assumed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Iwamoto, T -- Tamura, M -- Kabuto, C -- Kira, M -- New York, N.Y. -- Science. 2000 Oct 20;290(5491):504-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11039928" target="_blank"〉PubMed〈/a〉

Description: MicroRNAs (miRNAs) have emerged as key post-transcriptional regulators of gene expression, involved in diverse physiological and pathological processes. Although miRNAs can function as both tumour suppressors and oncogenes in tumour development, a widespread downregulation of miRNAs is commonly observed in human cancers and promotes cellular transformation and tumorigenesis. This indicates an inherent significance of small RNAs in tumour suppression. However, the connection between tumour suppressor networks and miRNA biogenesis machineries has not been investigated in depth. Here we show that a central tumour suppressor, p53, enhances the post-transcriptional maturation of several miRNAs with growth-suppressive function, including miR-16-1, miR-143 and miR-145, in response to DNA damage. In HCT116 cells and human diploid fibroblasts, p53 interacts with the Drosha processing complex through the association with DEAD-box RNA helicase p68 (also known as DDX5) and facilitates the processing of primary miRNAs to precursor miRNAs. We also found that transcriptionally inactive p53 mutants interfere with a functional assembly between Drosha complex and p68, leading to attenuation of miRNA processing activity. These findings suggest that transcription-independent modulation of miRNA biogenesis is intrinsically embedded in a tumour suppressive program governed by p53. Our study reveals a previously unrecognized function of p53 in miRNA processing, which may underlie key aspects of cancer biology.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Suzuki, Hiroshi I -- Yamagata, Kaoru -- Sugimoto, Koichi -- Iwamoto, Takashi -- Kato, Shigeaki -- Miyazono, Kohei -- England -- Nature. 2009 Jul 23;460(7254):529-33. doi: 10.1038/nature08199.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Pathology, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19626115" target="_blank"〉PubMed〈/a〉

Description: Ca(2+)/cation antiporters catalyze the exchange of Ca(2+) with various cations across biological membranes to regulate cytosolic calcium levels. The recently reported structure of a prokaryotic Na(+)/Ca(2+) exchanger (NCX_Mj) revealed its overall architecture in an outward-facing state. Here, we report the crystal structure of a H(+)/Ca(2+) exchanger from Archaeoglobus fulgidus (CAX_Af) in the two representatives of the inward-facing conformation at 2.3 A resolution. The structures suggested Ca(2+) or H(+) binds to the cation-binding site mutually exclusively. Structural comparison of CAX_Af with NCX_Mj revealed that the first and sixth transmembrane helices alternately create hydrophilic cavities on the intra- and extracellular sides. The structures and functional analyses provide insight into the mechanism of how the inward- to outward-facing state transition is triggered by the Ca(2+) and H(+) binding.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nishizawa, Tomohiro -- Kita, Satomi -- Maturana, Andres D -- Furuya, Noritaka -- Hirata, Kunio -- Kasuya, Go -- Ogasawara, Satoshi -- Dohmae, Naoshi -- Iwamoto, Takahiro -- Ishitani, Ryuichiro -- Nureki, Osamu -- New York, N.Y. -- Science. 2013 Jul 12;341(6142):168-72. doi: 10.1126/science.1239002. Epub 2013 May 23.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biophysics and Biochemistry, Graduate School of Science, University of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo 113-0032, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23704374" target="_blank"〉PubMed〈/a〉

Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rocha, L A -- Aleixo, A -- Allen, G -- Almeda, F -- Baldwin, C C -- Barclay, M V L -- Bates, J M -- Bauer, A M -- Benzoni, F -- Berns, C M -- Berumen, M L -- Blackburn, D C -- Blum, S -- Bolanos, F -- Bowie, R C K -- Britz, R -- Brown, R M -- Cadena, C D -- Carpenter, K -- Ceriaco, L M -- Chakrabarty, P -- Chaves, G -- Choat, J H -- Clements, K D -- Collette, B B -- Collins, A -- Coyne, J -- Cracraft, J -- Daniel, T -- de Carvalho, M R -- de Queiroz, K -- Di Dario, F -- Drewes, R -- Dumbacher, J P -- Engilis, A Jr -- Erdmann, M V -- Eschmeyer, W -- Feldman, C R -- Fisher, B L -- Fjeldsa, J -- Fritsch, P W -- Fuchs, J -- Getahun, A -- Gill, A -- Gomon, M -- Gosliner, T -- Graves, G R -- Griswold, C E -- Guralnick, R -- Hartel, K -- Helgen, K M -- Ho, H -- Iskandar, D T -- Iwamoto, T -- Jaafar, Z -- James, H F -- Johnson, D -- Kavanaugh, D -- Knowlton, N -- Lacey, E -- Larson, H K -- Last, P -- Leis, J M -- Lessios, H -- Liebherr, J -- Lowman, M -- Mahler, D L -- Mamonekene, V -- Matsuura, K -- Mayer, G C -- Mays, H Jr -- McCosker, J -- McDiarmid, R W -- McGuire, J -- Miller, M J -- Mooi, R -- Mooi, R D -- Moritz, C -- Myers, P -- Nachman, M W -- Nussbaum, R A -- Foighil, D O -- Parenti, L R -- Parham, J F -- Paul, E -- Paulay, G -- Perez-Eman, J -- Perez-Matus, A -- Poe, S -- Pogonoski, J -- Rabosky, D L -- Randall, J E -- Reimer, J D -- Robertson, D R -- Rodel, M-O -- Rodrigues, M T -- Roopnarine, P -- Ruber, L -- Ryan, M J -- Sheldon, F -- Shinohara, G -- Short, A -- Simison, W B -- Smith-Vaniz, W F -- Springer, V G -- Stiassny, M -- Tello, J G -- Thompson, C W -- Trnski, T -- Tucker, P -- Valqui, T -- Vecchione, M -- Verheyen, E -- Wainwright, P C -- Wheeler, T A -- White, W T -- Will, K -- Williams, J T -- Williams, G -- Wilson, E O -- Winker, K -- Winterbottom, R -- Witt, C C -- New York, N.Y. -- Science. 2014 May 23;344(6186):814-5. doi: 10.1126/science.344.6186.814.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉California Academy of Sciences, San Francisco, CA 94118, USA. LRocha@calacademy.org. ; Museu Paraense Emilio Goeldi, Belem, PA, 66040-170, Brazil. ; Western Australian Museum, Perth, WA, 6986, Australia. ; California Academy of Sciences, San Francisco, CA 94118, USA. ; Smithsonian Institution, Washington, DC 20560, USA. ; Natural History Museum, London, SW7 5BD, UK. ; Field Museum of Natural History, Chicago, IL 60605, USA. ; Villanova University, Villanova, PA 19085, USA. ; University of Milano-Bicocca, Milan, 20126, Italy. ; Utica College, Utica, NY 13502, USA. ; King Abdullah University of Science and Technology, Thuwal, 23955, Saudi Arabia. ; Universidad de Costa Rica, San Jose, 11501-2060, Costa Rica. ; University of California, Berkeley, CA 94720-3161, USA. ; University of Kansas, Lawrence, KS 66045, USA. ; Universidad de los Andes, Bogota, 4976, Colombia. ; Old Dominion University, Norfolk, VA 23529, USA. ; Museu Nacional de Historia Natural e da Ciencia, Lisbon, 7005-638, Portugal. ; Louisiana State University, Baton Rouge, LA 70803, USA. ; James Cook University, Townsville, 4811, Australia. ; University of Auckland, Auckland, 1142, New Zealand. ; NOAA Systematics Laboratory, Washington, DC 20013, USA. ; University of Chicago, Chicago, IL 60637, USA. ; American Museum of Natural History, New York, NY 10024, USA. ; Universidade de Sao Paulo, Sao Paulo, SP, 05508-090, Brazil. ; Universidade Federal do Rio de Janeiro, Macae, RJ, 27965-045, Brazil. ; University of California, Davis, CA 95616, USA. ; Conservation International, Denpasar, Bali, 80235, Indonesia. ; University of Nevada, Reno, NV 89557-0314, USA. ; Natural History Museum of Denmark, Copenhagen, DK-2100, Denmark. ; Museum National d'Histoire Naturelle, Paris, 75005, France. ; Addis Ababa University, Addis Ababa, 1176, Ethiopia. ; University of Sydney, Sydney, NSW, 2006, Australia. ; Museum Victoria, Melbourne, 3001, VIC, Australia. ; University of Colorado, Boulder, CO 80309-0334, USA. ; Harvard University, Cambridge, MA 02138, USA. ; Smithsonian Institution, Washington, DC 20560, USA. National University of Singapore, 117543, Singapore. ; Museum and Art Gallery of the Northern Territory, Darwin, 0820, NT, Australia. ; CSIRO Marine & Atmospheric Research, Hobart, TAS, 7000, Australia. ; Australian Museum, Sydney, NSW, 2010, Australia. ; Smithsonian Tropical Research Institute, Balboa, 0843-03092, Panama. ; Cornell University, Ithaca, NY 14853, USA. ; Universite Marien Ngouabi, Brazzaville, B.P. 69, Republic of Congo. ; National Museum of Nature and Science, Tsukuba, 305-0005, Japan. ; University of Wisconsin-Parkside, Kenosha, WI 53141-2000, USA. ; Cincinnati Museum Center, Cincinnati, OH 45203, USA. ; The Manitoba Museum, Winnipeg, MB, R3B 0N2, Canada. ; Australian National University, Canberra, ACT, 0200, Australia. ; University of Michigan, Ann Arbor, MI 48109-1079, USA. ; California State University, Fullerton, CA 92831, USA. ; The Ornithological Council, Chevy Chase, MD 20815, USA. ; University of Florida, Gainesville, fl32611, USA. ; Universidad Central de Venezuela, Caracas, 1041, Venezuela. ; Pontif cia Universidad Catolica de Chile, Santiago 6513677, Chile. ; University of New Mexico, Albuquerque, NM 87131-0001, USA. ; Bernice P. Bishop Museum, Honolulu, HI 96817, USA. ; University of the Ryukyus, Nishihara, 903-0213, Japan. ; Museum fur Naturkunde, Berlin, 10115, Germany. ; Naturhistorisches Museum der Burgergemeinde Bern, Bern, CH-3005, Switzerland. ; American Museum of Natural History, New York, NY 10024, USA. Long Island University, Brooklyn, NY 11201-8423, USA. ; Auckland Museum, Auckland, 1142, New Zealand. ; Centro de Ornitologia y Biodiversidad, Lima, 33, Peru. ; Royal Belgian Institute of Natural Sciences, Brussels, 1000, Belgium. ; McGill University, Montreal, QC, H9X 3V9, Canada. ; University of Alaska Museum, Fairbanks, AK 99775, USA. ; Royal Ontario Museum, Toronto, ON, M5S 2C6, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24855245" target="_blank"〉PubMed〈/a〉