Interpretation of the sonic hedgehog morphogen gradient by a temporal adaptation mechanism.

abstract：:Although many animals use the Earth's magnetic field for orientation and navigation, the precise biophysical mechanisms underlying magnetic sensing have been elusive. One theoretical model proposes that geomagnetic fields are perceived by chemical reactions involving specialized photoreceptors. However, the specific p...

journal_title：Nature

authors： Gegear RJ,Casselman A,Waddell S,Reppert SM

更新日期：2008-08-21 00:00:00

abstract：:The Ras proto-oncogene is a central component of mitogenic signal-transduction pathways, and is essential for cells both to leave a quiescent state (G0) and to pass through the G1/S transition of the cell cycle. The mechanism by which Ras signalling regulates cell-cycle progression is unclear, however. Here we report ...

journal_title：Nature

authors： Peeper DS,Upton TM,Ladha MH,Neuman E,Zalvide J,Bernards R,DeCaprio JA,Ewen ME

更新日期：1997-03-13 00:00:00

abstract：:The initiation of plate tectonics on Earth is a critical event in our planet's history. The time lag between the first proto-subduction (about 4 billion years ago) and global tectonics (approximately 3 billion years ago) suggests that plates and plate boundaries became widespread over a period of 1 billion years. The ...

journal_title：Nature

authors： Bercovici D,Ricard Y

更新日期：2014-04-24 00:00:00

abstract：:The accumulation of somatic DNA damage has been implicated as a cause of ageing in metazoa. One possible mechanism by which increased DNA damage could lead to cellular degeneration and death is by stochastic deregulation of gene expression. Here we directly test for increased transcriptional noise in aged tissue by di...

journal_title：Nature

authors： Bahar R,Hartmann CH,Rodriguez KA,Denny AD,Busuttil RA,Dollé ME,Calder RB,Chisholm GB,Pollock BH,Klein CA,Vijg J

更新日期：2006-06-22 00:00:00

abstract：:In epithelial Madin-Darby canine kidney (MDCK) cells newly synthesized molecules are sorted in the trans-Golgi network and directly delivered to their apical and basolateral surface destinations. Sorting is mediated by signals in the cytoplasmic domains of basolateral transmembrane proteins whereas glycosylphosphatidy...

journal_title：Nature

authors： Scheiffele P,Peränen J,Simons K

更新日期：1995-11-02 00:00:00

abstract：:In general, heterozygous animal cells express both alleles at a particular locus. The only exceptions are cells of XX genotype after inactivation of one X chromosome, and immunoglobulin-producing cells; in each case only one of the two alleles is expressed in differentiated cells and their progeny. This phenomenon, te...

journal_title：Nature

authors： Joho R,Weissman IL

更新日期：1980-03-13 00:00:00

abstract：:Galactic cosmic rays (CRs) are widely believed to be accelerated by shock waves associated with the expansion of supernova ejecta into the interstellar medium. A key issue in this long-standing conjecture is a theoretical prediction that the interstellar magnetic field can be substantially amplified at the shock of a ...

journal_title：Nature

authors： Uchiyama Y,Aharonian FA,Tanaka T,Takahashi T,Maeda Y

更新日期：2007-10-04 00:00:00

abstract：:The embryos and larvae of stalked crinoids, which are considered the most basal group of extant echinoderms, have not previously been described. In contrast, much is known about the development of the more accessible stalkless crinoids (feather stars), which are phylogenetically derived from stalked forms. Here we des...

journal_title：Nature

authors： Nakano H,Hibino T,Oji T,Hara Y,Amemiya S

更新日期：2003-01-09 00:00:00

abstract：:Eukaryotic cells contain genes termed proto-oncogenes (c-onc) which have the potential to transform cells in culture and induce tumours in vivo. Most of these genes have been identified by their occasional incorporation into retroviral genomes which can act as natural transducing vectors for these and perhaps other ce...

journal_title：Nature

authors： Sutrave P,Bonner TI,Rapp UR,Jansen HW,Patschinsky T,Bister K

更新日期：1984-05-03 00:00:00

abstract：:Neuropeptide Y (NPY) has a number of functions in mammalian physiology. Here we identify a role for NPY in promoting proliferation of postnatal neuronal precursor cells. NPY is synthesized in the postnatal olfactory epithelium by sustentacular cells, previously proposed to function only in structural support. Mice wit...

journal_title：Nature

authors： Hansel DE,Eipper BA,Ronnett GV

更新日期：2001-04-19 00:00:00

abstract：:The crab Xenograpsus testudinatus lives at enormously high densities around the sulphur-rich hydrothermal vents found in shallow waters off Taiwan, even though this acidic environment is low in nutrients. Here we show that these crabs swarm out of their crevices at slack water and feed on the vast numbers of zooplankt...

journal_title：Nature

authors： Jeng MS,Ng NK,Ng PK

更新日期：2004-12-23 00:00:00

abstract：:The observation of the superfluid to Mott insulator phase transition of ultracold atoms in optical lattices was an enabling discovery in experimental many-body physics, providing the first tangible example of a quantum phase transition (one that occurs even at zero temperature) in an ultracold atomic gas. For a trappe...

journal_title：Nature

authors： Gemelke N,Zhang X,Hung CL,Chin C

更新日期：2009-08-20 00:00:00

abstract：:The midbrain region periaqueductal grey (PAG) is rich in opioid receptors and endogenous opioids and is a major target of analgesic action in the central nervous system. It has been proposed that the analgesic effect of opioids on the PAG works by suppressing the inhibitory influence of the neurotransmitter GABA (gamm...

journal_title：Nature

authors： Vaughan CW,Ingram SL,Connor MA,Christie MJ

更新日期：1997-12-11 00:00:00

abstract：:Transcription factors recognize specific genomic sequences to regulate complex gene-expression programs. Although it is well-established that transcription factors bind to specific DNA sequences using a combination of base readout and shape recognition, some fundamental aspects of protein-DNA binding remain poorly und...

journal_title：Nature

authors： Afek A,Shi H,Rangadurai A,Sahay H,Senitzki A,Xhani S,Fang M,Salinas R,Mielko Z,Pufall MA,Poon GMK,Haran TE,Schumacher MA,Al-Hashimi HM,Gordân R

更新日期：2020-11-01 00:00:00

abstract：:Mutation of the XRCC4 gene in mammalian cells prevents the formation of the signal and coding joints in the V(D)J recombination reaction, which is necessary for production of a functional immunoglobulin gene, and renders the cells highly sensitive to ionizing radiation. However, XRCC4 shares no sequence homology with ...

journal_title：Nature

authors： Grawunder U,Wilm M,Wu X,Kulesza P,Wilson TE,Mann M,Lieber MR

更新日期：1997-07-31 00:00:00

abstract：:The complexity of ecosystems can cause subtle and chaotic responses to changes in external forcing. Although ecosystems may not normally behave chaotically, sensitivity to external influences associated with nonlinearity can lead to amplification of climatic signals. Strong correlations between an El Niño index and ra...

journal_title：Nature

authors： Taylor AH,Allen JI,Clark PA

更新日期：2002-04-11 00:00:00

abstract：:Many galaxies are thought to have supermassive black holes at their centres-more than a million times the mass of the Sun. Measurements of stellar velocities and the discovery of variable X-ray emission have provided strong evidence in favour of such a black hole at the centre of the Milky Way, but have hitherto been ...

journal_title：Nature

authors： Schödel R,Ott T,Genzel R,Hofmann R,Lehnert M,Eckart A,Mouawad N,Alexander T,Reid MJ,Lenzen R,Hartung M,Lacombe F,Rouan D,Gendron E,Rousset G,Lagrange AM,Brandner W,Ageorges N,Lidman C,Moorwood AF,Spyromilio J,Hu

更新日期：2002-10-17 00:00:00

abstract：:Therapeutic vaccines derived from carbohydrate antigen-adjuvant combinations are a promising approach for cancer immunotherapy. One of the critical limitations in this area is access to sufficient quantities of tumour-associated carbohydrate antigens and glycoconjugate adjuvants. At present, availability of the comple...

journal_title：Nature

authors： Galonić DP,Gin DY

更新日期：2007-04-26 00:00:00

abstract：:The computations performed by local neural populations, such as a cortical layer, are typically inferred from anatomical connectivity and observations of neural activity. Here we describe a method-influence mapping-that uses single-neuron perturbations to directly measure how cortical neurons reshape sensory represent...

journal_title：Nature

authors： Chettih SN,Harvey CD

更新日期：2019-03-01 00:00:00

abstract：:Insect eyes have an anti-reflective coating, owing to nanostructures on the corneal surface creating a gradient of refractive index between that of air and that of the lens material1,2. These nanocoatings have also been shown to provide anti-adhesive functionality3. The morphology of corneal nanocoatings are very dive...

journal_title：Nature

authors： Kryuchkov M,Bilousov O,Lehmann J,Fiebig M,Katanaev VL

更新日期：2020-09-01 00:00:00

abstract：:The guanine nucleotide-binding stimulatory protein (Gs) couples hormone-receptor interaction to the activation of adenylate cyclase and the generation of cyclic AMP. Studies using frog neuroepithelium indicate that the sense of smell is mediated by a Gs-adenylate cyclase system, and this prompted us to test olfaction ...

journal_title：Nature

authors： Weinstock RS,Wright HN,Spiegel AM,Levine MA,Moses AM

更新日期：1986-08-14 00:00:00

abstract：:The National Institutes of Health's Recombinant DNA Advisory Committee (RAC) has approved a commercial proposal by Advanced Genetic Sciences Inc. to field-test recombinant ice-nucleating bacteria. Its decision came two weeks after a federal judge halted a similar trial by researchers from the University of California...

journal_title：Nature

authors： Budiansky S

更新日期：1984-06-07 00:00:00

abstract：:The generation and selection of somatic antibody mutants are key elements of acquired immunity, essential for the affinity maturation of antibody responses dependent on T cells. The mutants are generated through a mechanism that introduces point mutations at high rate into rearranged variable (V) region genes in the c...

journal_title：Nature

authors： Jacob J,Kelsoe G,Rajewsky K,Weiss U

更新日期：1991-12-05 00:00:00

abstract：:Brain development and function depend on the precise regulation of gene expression. However, our understanding of the complexity and dynamics of the transcriptome of the human brain is incomplete. Here we report the generation and analysis of exon-level transcriptome and associated genotyping data, representing males ...

journal_title：Nature

authors： Kang HJ,Kawasawa YI,Cheng F,Zhu Y,Xu X,Li M,Sousa AM,Pletikos M,Meyer KA,Sedmak G,Guennel T,Shin Y,Johnson MB,Krsnik Z,Mayer S,Fertuzinhos S,Umlauf S,Lisgo SN,Vortmeyer A,Weinberger DR,Mane S,Hyde TM,Huttner A

更新日期：2011-10-26 00:00:00

abstract：:Imperfect knowledge of the times at which 'snapshots' of a system are recorded degrades our ability to recover dynamical information, and can scramble the sequence of events. In X-ray free-electron lasers, for example, the uncertainty--the so-called timing jitter--between the arrival of an optical trigger ('pump') pul...

journal_title：Nature

authors： Fung R,Hanna AM,Vendrell O,Ramakrishna S,Seideman T,Santra R,Ourmazd A,Ourmazd A

更新日期：2016-04-28 00:00:00

abstract：:Escherichia coli RNA polymerase (RNAP) synthesizes RNA with remarkable fidelity in vivo. Its low error rate may be achieved by means of a 'proofreading' mechanism comprised of two sequential events. The first event (backtracking) involves a transcriptionally upstream motion of RNAP through several base pairs, which ca...

journal_title：Nature

authors： Shaevitz JW,Abbondanzieri EA,Landick R,Block SM

更新日期：2003-12-11 00:00:00

abstract：:The colorectal adenoma-carcinoma sequence has provided a paradigmatic framework for understanding the successive somatic genetic changes and consequent clonal expansions that lead to cancer1. However, our understanding of the earliest phases of colorectal neoplastic changes-which may occur in morphologically normal ti...

journal_title：Nature

authors： Lee-Six H,Olafsson S,Ellis P,Osborne RJ,Sanders MA,Moore L,Georgakopoulos N,Torrente F,Noorani A,Goddard M,Robinson P,Coorens THH,O'Neill L,Alder C,Wang J,Fitzgerald RC,Zilbauer M,Coleman N,Saeb-Parsy K,Martincorena

更新日期：2019-10-01 00:00:00

abstract：:The antidiuretic effect of arginine vasopressin (AVP) is mediated by renal-type (V2) receptors linked to adenylyl cyclase. We report here the cloning of the rat kidney V2 AVP receptor complementary DNA that encodes a 370-amino-acid protein with a transmembrane topography characteristic of G protein-coupled receptors, ...

journal_title：Nature

authors： Lolait SJ,O'Carroll AM,McBride OW,Konig M,Morel A,Brownstein MJ

更新日期：1992-05-28 00:00:00

abstract：:The additional author support information was erroneously omitted from the Supplementary Information. This has been corrected online. ...

journal_title：Nature

authors： Hilf N,Kuttruff-Coqui S,Frenzel K,Bukur V,Stevanović S,Gouttefangeas C,Platten M,Tabatabai G,Dutoit V,van der Burg SH,Straten PT,Martinez-Ricarte F,Ponsati B,Okada H,Lassen U,Admon A,Ottensmeier CH,Ulges A,Kreiter S,

更新日期：2019-02-01 00:00:00

abstract：:A grand challenge of systems biology is to predict the kinetic responses of living systems to perturbations starting from the underlying molecular interactions. Changes in the nutrient environment have long been used to study regulation and adaptation phenomena in microorganisms and they remain a topic of active inves...

journal_title：Nature

authors： Erickson DW,Schink SJ,Patsalo V,Williamson JR,Gerland U,Hwa T

更新日期：2017-11-02 00:00:00