Superconductivity at 250 K in lanthanum hydride under high pressures.

abstract：:Optical irradiation accompanied by spontaneous anti-Stokes emission can lead to cooling of matter, in a phenomenon known as laser cooling, or optical refrigeration, which was proposed by Pringsheim in 1929. In gaseous matter, an extremely low temperature can be obtained in diluted atomic gases by Doppler cooling, and ...

journal_title：Nature

authors： Zhang J,Li D,Chen R,Xiong Q

更新日期：2013-01-24 00:00:00

abstract：:Reported widespread declines of wild and managed insect pollinators have serious consequences for global ecosystem services and agricultural production. Bees contribute approximately 80% of insect pollination, so it is important to understand and mitigate the causes of current declines in bee populations . Recent stud...

journal_title：Nature

authors： Gill RJ,Ramos-Rodriguez O,Raine NE

更新日期：2012-11-01 00:00:00

abstract：:The mechanism whereby eukaryotic pre-messenger RNAs are polyadenylated is unknown. Most models for polyadenylation invoke cleavage of precursor transcripts at the site of poly(A) addition followed by polymerization of A residues by poly(A) polymerase. Analysis of the sequences surrounding poly(A) addition sites has id...

journal_title：Nature

authors： Berget SM

更新日期：1984-05-10 00:00:00

abstract：:Several hormones and neurotransmitters raise the cytosolic free Ca2+ concentration by stimulating the influx of Ca2+ and/or by mobilizing stored Ca2+. However, the link between the agonist receptor on the cell surface and the organelle(s) from which Ca2+ is mobilized is unknown. One feature of the agonists that increa...

journal_title：Nature

authors： Prentki M,Biden TJ,Janjic D,Irvine RF,Berridge MJ,Wollheim CB

更新日期：1984-06-07 00:00:00

abstract：:The study of planarian regeneration may help us to understand how we can rebuild organs and tissues after injury, disease or ageing. The robust regenerative abilities of planarians are based upon a population of totipotent stem cells (neoblasts), and among the organs regenerated by these animals is a well-organized ce...

journal_title：Nature

authors： Cebrià F,Kobayashi C,Umesono Y,Nakazawa M,Mineta K,Ikeo K,Gojobori T,Itoh M,Taira M,Sánchez Alvarado A,Agata K

更新日期：2002-10-10 00:00:00

abstract：:Pro-inflammatory cytokines activate the transcription factor NF-kappaB by stimulating the activity of a protein kinase that phosphorylates IkappaB, an inhibitor of NF-kappaB, at sites that trigger its ubiquitination and degradation. This results in the nuclear translocation of freed NF-kappaB dimers and the activation...

journal_title：Nature

authors： Rothwarf DM,Zandi E,Natoli G,Karin M

更新日期：1998-09-17 00:00:00

abstract：:'Pioneer' transcription factors are required for stem-cell pluripotency, cell differentiation and cell reprogramming1,2. Pioneer factors can bind nucleosomal DNA to enable gene expression from regions of the genome with closed chromatin. SOX2 is a prominent pioneer factor that is essential for pluripotency and self-re...

journal_title：Nature

authors： Dodonova SO,Zhu F,Dienemann C,Taipale J,Cramer P

更新日期：2020-04-01 00:00:00

abstract：:Acquired drug resistance is a major problem in the treatment of cancer. Of the more than 500,000 annual deaths from cancer in the United States, many follow the development of resistance to chemotherapy. The emergence of resistance depends in part on the genetic instability, heterogeneity and high mutational rate of t...

journal_title：Nature

authors： Boehm T,Folkman J,Browder T,O'Reilly MS

更新日期：1997-11-27 00:00:00

abstract：:Animals must respond to various threats to survive. Neurons that express calcitonin gene-related peptide in the parabrachial nucleus (CGRPPBN neurons) relay sensory signals that contribute to satiation and pain-induced fear behaviour, but it is unclear how they encode these distinct processes. Here, by recording calci...

journal_title：Nature

authors： Campos CA,Bowen AJ,Roman CW,Palmiter RD

更新日期：2018-03-29 00:00:00

abstract：:Chemokines are chemotactic cytokines that activate and direct the migration of leukocytes. There are two subfamilies, the CXC and the CC chemokines. We recently found that the CXC-chemokine stromal cell-derived factor-1 (SDF-1) is a highly efficacious lymphocyte chemoattractant. Chemokines act on responsive leukocyte ...

journal_title：Nature

authors： Bleul CC,Farzan M,Choe H,Parolin C,Clark-Lewis I,Sodroski J,Springer TA

更新日期：1996-08-29 00:00:00

abstract：:The advent of endothermy, which is achieved through the continuous homeostatic regulation of body temperature and metabolism1,2, is a defining feature of mammalian and avian evolution. However, when challenged by food deprivation or harsh environmental conditions, many mammalian species initiate adaptive energy-conser...

journal_title：Nature

authors： Hrvatin S,Sun S,Wilcox OF,Yao H,Lavin-Peter AJ,Cicconet M,Assad EG,Palmer ME,Aronson S,Banks AS,Griffith EC,Greenberg ME

更新日期：2020-07-01 00:00:00

abstract：:In response to adenosine 5'-diphosphate, the P2Y1 receptor (P2Y1R) facilitates platelet aggregation, and thus serves as an important antithrombotic drug target. Here we report the crystal structures of the human P2Y1R in complex with a nucleotide antagonist MRS2500 at 2.7 Å resolution, and with a non-nucleotide antago...

journal_title：Nature

authors： Zhang D,Gao ZG,Zhang K,Kiselev E,Crane S,Wang J,Paoletta S,Yi C,Ma L,Zhang W,Han GW,Liu H,Cherezov V,Katritch V,Jiang H,Stevens RC,Jacobson KA,Zhao Q,Wu B

更新日期：2015-04-16 00:00:00

abstract：:The clinical course of autoimmune and infectious disease varies greatly, even between individuals with the same condition. An understanding of the molecular basis for this heterogeneity could lead to significant improvements in both monitoring and treatment. During chronic infection the process of T-cell exhaustion in...

journal_title：Nature

authors： McKinney EF,Lee JC,Jayne DR,Lyons PA,Smith KG

更新日期：2015-07-30 00:00:00

abstract：:Resolving current concerns about the role of biodiversity on ecosystems calls for understanding the separate roles of changes in species numbers and of composition. Recent work shows that primary productivity often, but not always, saturates with species richness within single trophic levels. However, any interpretati...

journal_title：Nature

authors： Downing AL,Leibold MA

更新日期：2002-04-25 00:00:00

abstract：:Receptors for excitatory amino acids in the mammalian central nervous system are classified into three major subtypes, ones which prefer N-methyl-D-aspartate (NMDA), quisqualate (QA), or kainate (KA) as type agonists respectively. These receptors are considered to mediate fast postsynaptic potentials by activating ion...

journal_title：Nature

authors： Sugiyama H,Ito I,Hirono C

更新日期：1987-02-05 00:00:00

abstract：:Whether or not the Large Hadron Collider reveals the long-awaited Higgs particle, it is likely to lead to discoveries that add to, or challenge, the standard model of particle physics. Data produced will be pored over for any evidence of supersymmetric partners for the existing denizens of the particle 'zoo' and for t...

journal_title：Nature

authors： Ellis J

更新日期：2007-07-19 00:00:00

abstract：:The c-Myc oncoprotein promotes proliferation and apoptosis, such that mutations that disable apoptotic programmes often cooperate with MYC during tumorigenesis. Here we report that two common mutant MYC alleles derived from human Burkitt's lymphoma uncouple proliferation from apoptosis and, as a result, are more effec...

journal_title：Nature

authors： Hemann MT,Bric A,Teruya-Feldstein J,Herbst A,Nilsson JA,Cordon-Cardo C,Cleveland JL,Tansey WP,Lowe SW

更新日期：2005-08-11 00:00:00

abstract：:Autism spectrum disorder (ASD) is a group of conditions characterized by impaired social interaction and communication, and restricted and repetitive behaviours. ASD is a highly heritable disorder involving various genetic determinants. Shank2 (also known as ProSAP1) is a multi-domain scaffolding protein and signallin...

journal_title：Nature

authors： Won H,Lee HR,Gee HY,Mah W,Kim JI,Lee J,Ha S,Chung C,Jung ES,Cho YS,Park SG,Lee JS,Lee K,Kim D,Bae YC,Kaang BK,Lee MG,Kim E

更新日期：2012-06-13 00:00:00

abstract：:Many receptors for neuropeptides and hormones are coupled with the heterotrimeric G(i) protein, which activates the p42/44 mitogen-activated protein kinase (ERK/MAPK) cascade through both the alpha- and betagamma-subunits of G(i). The betagamma-subunit activates the ERK/MAPK cascade through tyrosine kinase. Constituti...

journal_title：Nature

authors： Mochizuki N,Ohba Y,Kiyokawa E,Kurata T,Murakami T,Ozaki T,Kitabatake A,Nagashima K,Matsuda M

更新日期：1999-08-26 00:00:00

abstract：:Promoters are DNA sequences that have an essential role in controlling gene expression. While recent whole cancer genome analyses have identified numerous hotspots of somatic point mutations within promoters, many have not yet been shown to perturb gene expression or drive cancer development. As such, positive selecti...

journal_title：Nature

authors： Perera D,Poulos RC,Shah A,Beck D,Pimanda JE,Wong JW

更新日期：2016-04-14 00:00:00

abstract：:The metabotropic glutamate receptors (mGluRs) are key receptors in the modulation of excitatory synaptic transmission in the central nervous system. Here we have determined three different crystal structures of the extracellular ligand-binding region of mGluR1--in a complex with glutamate and in two unliganded forms. ...

journal_title：Nature

authors： Kunishima N,Shimada Y,Tsuji Y,Sato T,Yamamoto M,Kumasaka T,Nakanishi S,Jingami H,Morikawa K

更新日期：2000-10-26 00:00:00

abstract：:The bacterial CRISPR/Cas9 system allows sequence-specific gene editing in many organisms and holds promise as a tool to generate models of human diseases, for example, in human pluripotent stem cells. CRISPR/Cas9 introduces targeted double-stranded breaks (DSBs) with high efficiency, which are typically repaired by no...

journal_title：Nature

authors： Paquet D,Kwart D,Chen A,Sproul A,Jacob S,Teo S,Olsen KM,Gregg A,Noggle S,Tessier-Lavigne M

更新日期：2016-05-05 00:00:00

abstract：:Mammalian telomeres repress DNA-damage activation at natural chromosome ends by recruiting specific inhibitors of the DNA-damage machinery that form a protective complex termed shelterin. Within this complex, TRF2 (also known as TERF2) has a crucial role in end protection through the suppression of ATM activation and ...

journal_title：Nature

authors： Okamoto K,Bartocci C,Ouzounov I,Diedrich JK,Yates JR 3rd,Denchi EL

更新日期：2013-02-28 00:00:00

abstract：:The theory of reinforcement learning provides a normative account, deeply rooted in psychological and neuroscientific perspectives on animal behaviour, of how agents may optimize their control of an environment. To use reinforcement learning successfully in situations approaching real-world complexity, however, agents...

journal_title：Nature

authors： Mnih V,Kavukcuoglu K,Silver D,Rusu AA,Veness J,Bellemare MG,Graves A,Riedmiller M,Fidjeland AK,Ostrovski G,Petersen S,Beattie C,Sadik A,Antonoglou I,King H,Kumaran D,Wierstra D,Legg S,Hassabis D

更新日期：2015-02-26 00:00:00

abstract：:The generation of a double-strand break in the Saccharomyces cerevisiae genome is a potentially catastrophic event that can induce cell-cycle arrest or ultimately result in loss of cell viability. The repair of such lesions is strongly dependent on proteins encoded by the RAD52 epistasis group of genes (RAD50-55, RAD5...

journal_title：Nature

authors： New JH,Sugiyama T,Zaitseva E,Kowalczykowski SC

更新日期：1998-01-22 00:00:00

abstract：:The crystal structure of the human p27Kip1 kinase inhibitory domain bound to the phosphorylated cyclin A-cyclin-dependent kinase 2 (Cdk2) complex has been determined at 2.3 angstrom. p27Kip1 binds the complex as an extended structure interacting with both cyclin A and Cdk2. On cyclin A, it binds in a groove formed by ...

journal_title：Nature

authors： Russo AA,Jeffrey PD,Patten AK,Massagué J,Pavletich NP

更新日期：1996-07-25 00:00:00

abstract：:The collagens represent an interesting example of a structurally related but genetically distinct family of proteins. Type I, the most abundant of the vertebrate collagens, comprises two pro alpha 1(I) chains and one pro alpha 2(I) chain, each containing terminal propeptides and a central domain of 338 (Gly, X, Y) rep...

journal_title：Nature

authors： Chu ML,de Wet W,Bernard M,Ding JF,Morabito M,Myers J,Williams C,Ramirez F

更新日期：1984-07-26 00:00:00

abstract：:Injury causes a systemic inflammatory response syndrome (SIRS) that is clinically much like sepsis. Microbial pathogen-associated molecular patterns (PAMPs) activate innate immunocytes through pattern recognition receptors. Similarly, cellular injury can release endogenous 'damage'-associated molecular patterns (DAMPs...

journal_title：Nature

authors： Zhang Q,Raoof M,Chen Y,Sumi Y,Sursal T,Junger W,Brohi K,Itagaki K,Hauser CJ

更新日期：2010-03-04 00:00:00

abstract：:Protein design provides a rigorous test of our knowledge about proteins and allows the creation of novel enzymes for biotechnological applications. Whereas progress has been made in designing proteins that mimic native proteins structurally, it is more difficult to design functional proteins. In comparison to recent s...

journal_title：Nature

authors： Yeung N,Lin YW,Gao YG,Zhao X,Russell BS,Lei L,Miner KD,Robinson H,Lu Y

更新日期：2009-12-24 00:00:00

abstract：:Ligand-gated ion channels, a major class of cell-surface proteins, have a pseudosymmetric structure with five highly homologous subunits arranged around a central ion pore. The correct assembly of each channel, whose subunit composition varies with cell type and stage of development, requires specific recognition betw...

journal_title：Nature

authors： Yu XM,Hall ZW

更新日期：1991-07-04 00:00:00