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Updated: 05-January-2009, 17:53
News from 12-12-2008 :
[PERSPECTIVES] BIOPHYSICS: Clutch Dynamics
A mechanical model describes how actin cytoskeletal dynamics and cell adhesion control mechanosensing and force generation. Authors: Yvonne Aratyn-Schaus, Margaret L. Gardel
[BREVIA] Compromised Survivorship in Zoo Elephants
Data from over 4500 elephants show that wild elephants live for approximately twice as long as those kept in European zoos. Authors: Ros Clubb, Marcus Rowcliffe, Phyllis Lee, Khyne U. Mar, Cynthia Moss, Georgia J. Mason
[RESEARCH ARTICLES] Developmental Patterning by Mechanical Signals in Arabidopsis
The growth pattern of plant meristem, the group of stem cells at the tip of a growing shoot, is controlled by a microtubule-based mechanical feedback loop. Authors: Olivier Hamant, Marcus G. Heisler, Henrik Jönsson, Pawel Krupinski, Magalie Uyttewaal, Plamen Bokov, Francis Corson, Patrik Sahlin, Arezki Boudaoud, Elliot M. Meyerowitz, Yves Couder, Jan Traas
[REPORTS] Mechanism of Threading a Polymer Through a Macrocyclic Ring
A polymer threads through a large ring-shaped molecule faster when it is long enough to bind to the outside of the ring first, but not too long that it cannot easily loop into the hole. Authors: Alexander B. C. Deutman, Cyrille Monnereau, Johannes A. A. W. Elemans, Gianfranco Ercolani, Roeland J. M. Nolte, Alan E. Rowan
[REPORTS] Earthquake Supercycles Inferred from Sea-Level Changes Recorded in the Corals of West Sumatra
Uplift records from corals imply that the Sumatra plate boundary ruptured in the 1300s, 1500s, and in 1797 and 1833; a 2007 temblor may mark the initiation of a next series of quakes. Authors: Kerry Sieh, Danny H. Natawidjaja, Aron J. Meltzner, Chuan-Chou Shen, Hai Cheng, Kuei-Shu Li, Bambang W. Suwargadi, John Galetzka, Belle Philibosian, R. Lawrence Edwards
[REPORTS] The Spreading of Disorder
Upon observing signs of social disorder (such as littering or graffiti), individuals are more likely to disobey a variety of social rules, including prohibitions against theft. Authors: Kees Keizer, Siegwart Lindenberg, Linda Steg
[REPORTS] Structure and Functional Role of Dynein’s Microtubule-Binding Domain
ATP hydrolysis by the molecular motor dynein transmits a structural change to its microtubule-binding domain, determining movement direction along the microtubule. Authors: Andrew P. Carter, Joan E. Garbarino, Elizabeth M. Wilson-Kubalek, Wesley E. Shipley, Carol Cho, Ronald A. Milligan, Ronald D. Vale, I. R. Gibbons
[REPORTS] Genomic Loss of microRNA-101 Leads to Overexpression of Histone Methyltransferase EZH2 in Cancer
In some human prostate cancers, a genomic deletion eliminates a key regulatory microRNA, which results in disruption of gene-silencing mechanisms. Authors: Sooryanarayana Varambally, Qi Cao, Ram-Shankar Mani, Sunita Shankar, Xiaosong Wang, Bushra Ateeq, Bharathi Laxman, Xuhong Cao, Xiaojun Jing, Kalpana Ramnarayanan, J. Chad Brenner, Jindan Yu, Jung H. Kim, Bo Han, Patrick Tan, Chandan Kumar-Sinha, Robert J. Lonigro, Nallasivam Palanisamy, Christopher A. Maher, Arul M. Chinnaiyan
[REPORTS] A Null Mutation in Human APOC3 Confers a Favorable Plasma Lipid Profile and Apparent Cardioprotection
A mutation resulting in a lifelong decrease in the expression of a protein that inhibits triglyceride hydrolysis may protect against cardiovascular disease. Authors: Toni I. Pollin, Coleen M. Damcott, Haiqing Shen, Sandra H. Ott, John Shelton, Richard B. Horenstein, Wendy Post, John C. McLenithan, Lawrence F. Bielak, Patricia A. Peyser, Braxton D. Mitchell, Michael Miller, Jeffrey R. O’Connell, Alan R. Shuldiner
[REPORTS] Regulation of Dendritic Cell Migration by CD74, the MHC Class II–Associated Invariant Chain
By binding to a myosin, an immune-specific protein known to control antigen processing also regulates the migration of dendritic cells, possibly coordinating the two functions. Authors: Gabrielle Faure-André, Pablo Vargas, Maria-Isabel Yuseff, Mélina Heuzé, Jheimmy Diaz, Danielle Lankar, Veronica Steri, Jeremy Manry, Stéphanie Hugues, Fulvia Vascotto, Jérôme Boulanger, Graça Raposo, Maria-Rosa Bono, Mario Rosemblatt, Matthieu Piel, Ana-Maria Lennon-Duménil
[REPORTS] De Novo Formation of a Subnuclear Body
The Cajal body, a nuclear structure for small ribonucleoprotein metabolism, can self-assemble from any one of its components immobilized on a substrate. Authors: Trish E. Kaiser, Robert V. Intine, Miroslav Dundr
This Week in Science
Contagious Rule-Breaking | Transporter Mechanics | Assemble, Inject, React, Reform | Cancer Epigenetics 101 | Dynamic Calcium | Sumatran Earthquake | Cytoskeleton and Substrate Stiffness | Threading a Molecular Needle | Genes, Triglycerides, and Heart Health | Invariant Chain Migration Control | Corralling the Cajal | Shaping Up | A Golden Route to Dyes | Impact Cratering | Meiosis in the Making | Coiled-Coil and Dynein Dynamics | The Mechanisms Behind Cognitive Enhancement | Ancient ESCRT to Division | Airy Silence
Editors' Choice
CHEMISTRY: A Marriage of Opposites | PLANT SCIENCE: Mapping Out Diversity | DEVELOPMENT: Turning On and Staying On | PSYCHOLOGY: Reading from Left to Right | PSYCHOLOGY: A Walk in the Woods | CHEMISTRY: Weighing Down Pyridine | CELL BIOLOGY: Hidden Change
Science Scope
Scientific Integrity at Issue | Obama at Sea | Inside ScienceInsider
Random Samples
WHAT'S SMALL, GREEN, AND INTELLIGENT? | FEATHERED AND TARRED | EARTHLY MAGNETISM | FIT FOR A QUEEN?
Newsmakers
THREE Q'S | MOVERS | INSIDE GOVERNMENT | CELEBRITIES
News from 12-05-2008 :
[NEWS] EUROPE: Ministers Bankroll European Space Agency's Ambitions
Europe's space scientists are breathing a collective sigh of relief because the member governments of the European Space Agency last week gave ESA more or less everything it had asked for in funding for the next few years--a total of nearly €10 billion. Author: Daniel Clery
[NEWS] MENINGITIS: Less Vaccine Can Be More
A team of epidemiologists reported this week that just one-fifth of the standard meningitis vaccine dose triggers an immune response almost as good as that of the full dose, offering a way to potentially stretch limited supplies. Author: Martin Enserink
[NEWS] IMMUNOLOGY: Fetal Immune System Hushes Attacks on Maternal Cells
On page
1562 of this week's issue of
Science, researchers provide an explanation for why some maternal cells that cross the placenta escape attack by the fetal immune system. The work also suggests a new mechanism for how the human immune system learns to spare the body's own tissues, a tolerance that breaks down in autoimmune diseases. Author: Mitch Leslie