Template-free RNA synthesis by Q beta replicase.

abstract：:The molecular mechanisms of exon definition and back-splicing are fundamental unanswered questions in pre-mRNA splicing. Here we report cryo-electron microscopy structures of the yeast spliceosomal E complex assembled on introns, providing a view of the earliest event in the splicing cycle that commits pre-mRNAs to sp...

journal_title：Nature

authors： Li X,Liu S,Zhang L,Issaian A,Hill RC,Espinosa S,Shi S,Cui Y,Kappel K,Das R,Hansen KC,Zhou ZH,Zhao R

更新日期：2019-09-01 00:00:00

abstract：:So far, two genes associated with familial melanoma have been identified, accounting for a minority of genetic risk in families. Mutations in CDKN2A account for approximately 40% of familial cases, and predisposing mutations in CDK4 have been reported in a very small number of melanoma kindreds. Here we report the who...

journal_title：Nature

authors： Yokoyama S,Woods SL,Boyle GM,Aoude LG,MacGregor S,Zismann V,Gartside M,Cust AE,Haq R,Harland M,Taylor JC,Duffy DL,Holohan K,Dutton-Regester K,Palmer JM,Bonazzi V,Stark MS,Symmons J,Law MH,Schmidt C,Lanagan C,O'C

更新日期：2011-11-13 00:00:00

abstract：:Fas is a type-I membrane protein that transduces an apoptotic signal. Binding of Fas ligand or agonistic anti-Fas antibody to Fas kills the cells by apoptosis. Studies in the nematode Caenorhabditis elegans have suggested that proteases such as interleukin-1 beta-converting enzyme (ICE) or the product of the C. elegan...

journal_title：Nature

authors： Enari M,Hug H,Nagata S

更新日期：1995-05-04 00:00:00

abstract：:The combination of complementary DNA expression and single-channel current analysis provides a powerful tool for studying the structure-function relationship of the nicotinic acetylcholine receptor (AChR) (refs 1-5). We have previously shown that AChR channels consisting of subunits from different species, expressed i...

journal_title：Nature

authors： Imoto K,Methfessel C,Sakmann B,Mishina M,Mori Y,Konno T,Fukuda K,Kurasaki M,Bujo H,Fujita Y

更新日期：1986-12-18 00:00:00

abstract：:Major histocompatibility complex class II molecules and their peptide ligands show unusual interaction kinetics, with slow association and dissociation rates that yield an apparent equilibrium constant of approximately 10(-6)-10(-8) M (refs 1-5). However, there is evidence for a specific, rapidly formed, short-lived c...

journal_title：Nature

authors： Sadegh-Nasseri S,Stern LJ,Wiley DC,Germain RN

更新日期：1994-08-25 00:00:00

abstract：:Erythroid differentiation entails the biogenesis of a membrane skeleton, a network of proteins underlying and interacting with the plasma membrane, whose major constituent is the heterodimeric protein spectrin, composed of two structurally similar but distinct subunits, alpha (relative molecular mass (Mr) 240,000) and...

journal_title：Nature

authors： Woods CM,Lazarides E

更新日期：1986-05-01 00:00:00

abstract：:The protein coding sequences of most eukaryotic messenger RNA precursors (pre-mRNAs) are interrupted by non-coding sequences called introns. Pre-mRNA splicing is the process by which introns are removed and the protein coding elements assembled into mature mRNAs. Alternative pre-mRNA splicing selectively joins differe...

journal_title：Nature

authors： Maniatis T,Tasic B

更新日期：2002-07-11 00:00:00

abstract：:Dopamine D2 receptors (D2Rs) are densely expressed in the striatum and have been linked to neuropsychiatric disorders such as schizophrenia1,2. High-affinity binding of dopamine suggests that D2Rs detect transient reductions in dopamine concentration (the dopamine dip) during punishment learning3-5. However, the natur...

journal_title：Nature

authors： Iino Y,Sawada T,Yamaguchi K,Tajiri M,Ishii S,Kasai H,Yagishita S

更新日期：2020-03-01 00:00:00

abstract：:Visual stimuli can acquire positive or negative value through their association with rewards and punishments, a process called reinforcement learning. Although we now know a great deal about how the brain analyses visual information, we know little about how visual representations become linked with values. To study t...

journal_title：Nature

authors： Paton JJ,Belova MA,Morrison SE,Salzman CD

更新日期：2006-02-16 00:00:00

abstract：:With the current shortage in fetal bovine serum, researchers are turning to a variety of options for cell and tissue culture. ...

journal_title：Nature

authors： Jayme DW,Epstein DA,Conrad DR

更新日期：1988-08-11 00:00:00

abstract：:Elongation factor Tu is present in a fourfold excess over the amount seemingly involved in protein synthesis. It is identical to a major protein which we have found associated with the plasma membrane. The possibility of a specific role in that location is considered. ...

journal_title：Nature

authors： Jacobson GR,Rosenbusch JP

更新日期：1976-05-06 00:00:00

abstract：:The enzyme Cu, Zn superoxide dismutase (SOD) protects against oxidative damage by dismuting the superoxide radical O2-. to molecular oxygen and hydrogen peroxide at the active-site Cu ion in a reaction that is rate-limited by diffusion and enhanced by electrostatic guidance. SOD has evolved to be one of the fastest en...

journal_title：Nature

authors： Getzoff ED,Cabelli DE,Fisher CL,Parge HE,Viezzoli MS,Banci L,Hallewell RA

更新日期：1992-07-23 00:00:00

abstract：:The mechanism of transformation of the overtly similar cells of the neural plate into the numerous and diverse cell types of the mature vertebrate central nervous system (CNS) can better be understood by studying the clonal development of isolated CNS precursor cells. Here I describe a culture system in which blast ce...

journal_title：Nature

authors： Temple S

更新日期：1989-08-10 00:00:00

abstract：: ...

journal_title：Nature

authors： Liao SE

更新日期：2018-11-01 00:00:00

abstract：:Type Ia supernovae have been used empirically as 'standard candles' to demonstrate the acceleration of the expansion of the Universe even though fundamental details, such as the nature of their progenitor systems and how the stars explode, remain a mystery. There is consensus that a white dwarf star explodes after acc...

journal_title：Nature

authors： Nugent PE,Sullivan M,Cenko SB,Thomas RC,Kasen D,Howell DA,Bersier D,Bloom JS,Kulkarni SR,Kandrashoff MT,Filippenko AV,Silverman JM,Marcy GW,Howard AW,Isaacson HT,Maguire K,Suzuki N,Tarlton JE,Pan YC,Bildsten L,Ful

更新日期：2011-12-14 00:00:00

abstract：:Fusion of biological membranes is mediated by specific lipid-interacting proteins that induce the formation and expansion of an initial fusion pore. Here we report the crystal structure of the ectodomain of the Semliki Forest virus fusion glycoprotein E1 in its low-pH-induced trimeric form. E1 adopts a folded-back con...

journal_title：Nature

authors： Gibbons DL,Vaney MC,Roussel A,Vigouroux A,Reilly B,Lepault J,Kielian M,Rey FA

更新日期：2004-01-22 00:00:00

abstract：:Certain mast cell products, including the tetrapeptides Ala-Gly-Ser-Glu (Ala4) and Val-Gly-Ser-Glu (Val4) of the eosinophil chemotactic factor of anaphylaxis (ECF-A) and histamine, are preferentially chemotactic for eosinophils in vitro. Amino acid substitutions or modifications of the ECF-A tetrapeptides may substant...

journal_title：Nature

authors： Capron M,Capron A,Goetzl EJ,Austen KF

更新日期：1981-01-01 00:00:00

abstract：:Quantum electrodynamics (resulting from the merger of quantum mechanics and relativity theory) has provided a clear understanding of phenomena ranging from particle physics to cosmology and from astrophysics to quantum chemistry. The ideas underlying quantum electrodynamics also influence the theory of condensed matte...

journal_title：Nature

authors： Novoselov KS,Geim AK,Morozov SV,Jiang D,Katsnelson MI,Grigorieva IV,Dubonos SV,Firsov AA

更新日期：2005-11-10 00:00:00

abstract：:Phototransduction in invertebrate microvillar photoreceptors is thought to be mediated by the activation of phospholipase C (PLC), but how this leads to gating of the light-sensitive channels is unknown. Most attention has focused on inositol-1,4,5-trisphosphate, a second messenger produced by PLC from phosphatidylino...

journal_title：Nature

authors： Chyb S,Raghu P,Hardie RC

更新日期：1999-01-21 00:00:00

abstract：:The ability to control the quantum state of a single electron spin in a quantum dot is at the heart of recent developments towards a scalable spin-based quantum computer. In combination with the recently demonstrated controlled exchange gate between two neighbouring spins, driven coherent single spin rotations would p...

journal_title：Nature

authors： Koppens FH,Buizert C,Tielrooij KJ,Vink IT,Nowack KC,Meunier T,Kouwenhoven LP,Vandersypen LM

更新日期：2006-08-17 00:00:00

abstract：:Retrospective epidemiological data have indicated that cutaneous malignant melanoma may arise as a consequence of intense, intermittent exposure of the skin to ultraviolet radiation, particularly in children, rather than from the cumulative lifetime exposure that is associated with other forms of skin cancer. Here we ...

journal_title：Nature

authors： Noonan FP,Recio JA,Takayama H,Duray P,Anver MR,Rush WL,De Fabo EC,Merlino G

更新日期：2001-09-20 00:00:00

abstract：:Photosynthetic dinoflagellates are important aquatic primary producers and notorious causes of toxic 'red tides'. Typical dinoflagellate chloroplasts differ from all other plastids in having a combination of three envelope membranes and peridinin-chlorophyll a/c light-harvesting pigments. Despite evidence of a dinofla...

journal_title：Nature

authors： Zhang Z,Green BR,Cavalier-Smith T

更新日期：1999-07-08 00:00:00

abstract：:Classical population-genetics theory suggests that reproductive isolation will evolve fastest in small isolated populations. In contrast, recent theory suggests that divergence should occur fastest in larger allopatric populations. The rationale behind this is that sexual conflict, potentially the strongest driver of ...

journal_title：Nature

authors： Martin OY,Hosken DJ

更新日期：2003-06-26 00:00:00

abstract：:Nuclear import of the NF-AT transcription factors during T-cell activation requires the calcium-activated phosphatase calcineurin, which unmasks nuclear-location signals on NF-AT. We show here that the nuclear import of NF-ATs is not sufficient to activate NF-AT target genes, as NF-ATs are subject to a futile cycling ...

journal_title：Nature

authors： Zhu J,McKeon F

更新日期：1999-03-18 00:00:00

abstract：:Hen egg-white lysozyme (HEWL) was the first enzyme to have its three-dimensional structure determined by X-ray diffraction techniques. A catalytic mechanism, featuring a long-lived oxocarbenium-ion intermediate, was proposed on the basis of model-building studies. The 'Phillips' mechanism is widely held as the paradig...

journal_title：Nature

authors： Vocadlo DJ,Davies GJ,Laine R,Withers SG

更新日期：2001-08-23 00:00:00

abstract：:Temperature-sensitive paralysis is the most striking defect of adult Drosophila carrying the shibire mutation. This is believed to be due to a reversible block of endocytosis, which prevents membrane cycling and thus depletes synaptic vesicles. The shibire mutation also affects many tissues outside the nervous system....

journal_title：Nature

authors： van der Bliek AM,Meyerowitz EM

更新日期：1991-05-30 00:00:00

abstract：:According to the generally accepted scenario, the last giant impact on Earth formed the Moon and initiated the final phase of core formation by melting Earth's mantle. A key goal of geochemistry is to date this event, but different ages have been proposed. Some argue for an early Moon-forming event, approximately 30 m...

journal_title：Nature

authors： Jacobson SA,Morbidelli A,Raymond SN,O'Brien DP,Walsh KJ,Rubie DC

更新日期：2014-04-03 00:00:00

abstract：:Understanding the physical mechanisms behind the generation of ocean waves by wind has been a longstanding challenge. Previous studies have assumed that ocean waves induce fluctuations in velocity and pressure of the overlying air that are synchronized with the waves, and numerical models have supported this assumptio...

journal_title：Nature

authors： Hristov TS,Miller SD,Friehe CA

更新日期：2003-03-06 00:00:00

abstract：:Endophilin I is a presynaptic protein of unknown function that binds to dynamin, a GTPase that is implicated in endocytosis and recycling of synaptic vesicles. Here we show that endophilin I is essential for the formation of synaptic-like microvesicles (SLMVs) from the plasma membrane. Endophilin I exhibits lysophosph...

journal_title：Nature

authors： Schmidt A,Wolde M,Thiele C,Fest W,Kratzin H,Podtelejnikov AV,Witke W,Huttner WB,Söling HD

更新日期：1999-09-09 00:00:00

abstract：:The most basic objection to human embryonic stem (ES) cell research is rooted in the fact that ES cell derivation deprives embryos of any further potential to develop into a complete human being. ES cell lines are conventionally isolated from the inner cell mass of blastocysts and, in a few instances, from cleavage st...

journal_title：Nature

authors： Chung Y,Klimanskaya I,Becker S,Marh J,Lu SJ,Johnson J,Meisner L,Lanza R

更新日期：2006-01-12 00:00:00