Structure of the full-length Shaker potassium channel Kv1.2 by normal-mode-based X-ray crystallographic refinement.

abstract：:Migration of organisms (or cells) is typically an adaptive response to spatiotemporal variation in resources that requires individuals to detect and respond to long-range and noisy environmental gradients. Many organisms, from wildebeest to bacteria, migrate en masse in a process that can involve a vast number of indi...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Guttal V,Couzin ID

更新日期：2010-09-14 00:00:00

abstract：:Mitochondria isolated from maize plants with S-type male-sterile cytoplasms are capable of synthesizing four species of RNA at concentrations of actinomycin D that eliminate all DNA-directed RNA synthesis. No RNA synthesis occurs under the same conditions with mitochondria from plants possessing normal (N) cytoplasm o...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Finnegan PM,Brown GG

更新日期：1986-07-01 00:00:00

abstract：:Genomic clones of the human non-N-methyl-D-aspartate (non-NMDA) glutamate receptor subunit GluR5 were isolated by high-stringency screening of a cosmid library using the rat cDNA as a probe. The chromosomal localization of the human GluR5 gene has been established. Southern hybridization of DNA isolated from mapping p...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Eubanks JH,Puranam RS,Kleckner NW,Bettler B,Heinemann SF,McNamara JO

更新日期：1993-01-01 00:00:00

abstract：:Chronic administration of the atypical antipsychotic drug, clozapine, to rodents has been shown to increase the concentration of apolipoprotein D (apoD) in several area of the brain, suggesting that apoD could be involved in the therapeutic effects of antipsychotic drugs and/or the pathology of psychotic illnesses. He...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Thomas EA,Dean B,Pavey G,Sutcliffe JG

更新日期：2001-03-27 00:00:00

abstract：:The ecological niche is a key concept for elucidating patterns of species distributions and developing strategies for conserving biodiversity. However, recent times are seeing a widespread debate whether species niches are conserved across space and time (niche conservatism hypothesis). Biological invasions represent ...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Liu C,Wolter C,Xian W,Jeschke JM

更新日期：2020-09-22 00:00:00

abstract：:An in-depth knowledge of the interaction of water with amorphous silica is critical to fundamental studies of interfacial hydration water, as well as to industrial processes such as catalysis, nanofabrication, and chromatography. Silica has a tunable surface comprising hydrophilic silanol groups and moderately hydroph...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Schrader AM,Monroe JI,Sheil R,Dobbs HA,Keller TJ,Li Y,Jain S,Shell MS,Israelachvili JN,Han S

更新日期：2018-03-20 00:00:00

abstract：:When light-grown seedlings of amaranth are transferred to total darkness, synthesis of the large subunit (LS) and small subunit (SS) of ribulose-1,5-bisphosphate carboxylase [RbuP(2)Case; 3-phospho-D-glycerate carboxylase (dimerizing), EC 4.1.1.39] is rapidly depressed. This reduction in RbuP(2)Case synthesis occurs i...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Berry JO,Carr JP,Klessig DF

更新日期：1988-06-01 00:00:00

abstract：:The folding, stability, and oligomerization of helical membrane proteins depend in part on a precise set of packing interactions between transmembrane helices. To understand the energetic principles of these helix-helix interactions, we have used alanine-scanning mutagenesis and sedimentation equilibrium analytical ul...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Fleming KG,Engelman DM

更新日期：2001-12-04 00:00:00

abstract：:Triose-phosphate isomerase (TPI; D-glyceraldehyde-3-phosphate ketol-isomerase, EC 5.3.1.1) deficiency is a recessive disorder that results in hemolytic anemia and neuromuscular dysfunction. To determine the molecular basis of this disorder, a TPI allele from two unrelated patients homozygous for TPI deficiency was com...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Daar IO,Artymiuk PJ,Phillips DC,Maquat LE

更新日期：1986-10-01 00:00:00

abstract：:Despite immense variability across languages, people can learn to understand any human language, spoken or signed. What neural mechanisms allow people to comprehend language across sensory modalities? When people listen to speech, electrophysiological oscillations in auditory cortex entrain to slow ([Formula: see text...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Brookshire G,Lu J,Nusbaum HC,Goldin-Meadow S,Casasanto D

更新日期：2017-06-13 00:00:00

abstract：:At least two kidney epithelial cell lines, the Madin-Darby canine kidney (MDCK) and the murine inner medullary collecting duct line mIMCD-3, can be induced to form branching tubular structures when cultured with hepatocyte growth factor (HGF) plus serum in collagen I gels. In our studies, whereas MDCK cells remained u...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Barros EJ,Santos OF,Matsumoto K,Nakamura T,Nigam SK

更新日期：1995-05-09 00:00:00

abstract：:"Evolution behaves like a tinkerer" (François Jacob, Science, 1977). Software systems provide a singular opportunity to understand biological processes using concepts from network theory. The Debian GNU/Linux operating system allows us to explore the evolution of a complex network in a unique way. The modular design d...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Fortuna MA,Bonachela JA,Levin SA

更新日期：2011-12-13 00:00:00

abstract：:Stat3 protein has an important role in oncogenesis and is a promising anticancer target. Indirubin, the active component of a traditional Chinese herbal medicine, has been shown previously to inhibit cyclin-dependent kinases, resulting in cell cycle arrest. Here, we show that the indirubin derivatives E564, E728, and ...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Nam S,Buettner R,Turkson J,Kim D,Cheng JQ,Muehlbeyer S,Hippe F,Vatter S,Merz KH,Eisenbrand G,Jove R

更新日期：2005-04-26 00:00:00

abstract：:Acid-sensing ion channels (ASICs) are neuronal non-voltage-gated cation channels that are activated when extracellular pH falls. They contribute to sensory function and nociception in the peripheral nervous system, and in the brain they contribute to synaptic plasticity and fear responses. Some of the physiologic cons...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Petroff EY,Price MP,Snitsarev V,Gong H,Korovkina V,Abboud FM,Welsh MJ

更新日期：2008-02-26 00:00:00

abstract：:Nucleotide variations, including SNPs, in the coding regions of disease genes are important targets for RNAi treatment, which is a promising medical treatment for intractable diseases such as triplet repeat diseases. However, the identification of such nucleotide variations and the design of siRNAs conferring disease ...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Takahashi M,Watanabe S,Murata M,Furuya H,Kanazawa I,Wada K,Hohjoh H

更新日期：2010-12-14 00:00:00

abstract：:The plant vascular system provides transport and support capabilities that are essential for plant growth and development, yet the mechanisms directing the arrangement of vascular bundles within the shoot inflorescence stem remain unknown. We used computational and experimental biology to evaluate the role of auxin an...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Ibañes M,Fàbregas N,Chory J,Caño-Delgado AI

更新日期：2009-08-11 00:00:00

abstract：:The circadian hormone melatonin is synthesized predominantly in the pineal gland by the actions of two pineal-specific enzymes: serotonin N-acetyltransferase (NAT) and hydroxyindole-O-methyltransferase (HIOMT). Pineal night-specific ATPase (PINA), another pineal- and night-specific protein we recently identified, is p...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Li X,Chen S,Wang Q,Zack DJ,Snyder SH,Borjigin J

更新日期：1998-02-17 00:00:00

abstract：:The shape of a plant is largely determined by regulation of lateral branching. Branching architecture can vary widely in response to both genotype and environment, suggesting regulation by a complex interaction of autonomous genetic factors and external signals. Tillers, branches initiated at the base of grass plants,...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Whipple CJ,Kebrom TH,Weber AL,Yang F,Hall D,Meeley R,Schmidt R,Doebley J,Brutnell TP,Jackson DP

更新日期：2011-08-16 00:00:00

abstract：:This article extends our previous quantitative analysis of the relationship between the dynamics of the primary structure of DNA and mutagenesis associated with single-strand lesions to an analysis of the production and processing of endogenous double-strand breaks (EDSBs) and to their implications for oncogenesis. We...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Vilenchik MM,Knudson AG

更新日期：2003-10-28 00:00:00

abstract：:[3H]Forskolin bound to high- and low-affinity sites in the rat brain. The high-affinity site was discretely located, with highest densities in the striatum, nucleus accumbens, olfactory tubercule, substantia nigra, hippocampus, and the molecular layers of the cerebellum. This site did not correlate well with the distr...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Poat JA,Cripps HE,Iversen LL

更新日期：1988-05-01 00:00:00

abstract：:Using chimeric recombinants transfected into HeLa cells and a transient expression assay, we demonstrate that the 5'-flanking region of the pS2 gene from position -428 to position -324 exhibits both constitutive and estrogen-inducible enhancer activity. The estrogen-inducible activity, but not the constitutive activit...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Berry M,Nunez AM,Chambon P

更新日期：1989-02-01 00:00:00

abstract：:Rapid antibody production in response to invading pathogens requires the dramatic expansion of pathogen-derived antigen-specific B lymphocyte populations. Whether B cell population dynamics are based on stochastic competition between competing cell fates, as in the development of competence by the bacterium Bacillus s...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Mitchell S,Roy K,Zangle TA,Hoffmann A

更新日期：2018-03-20 00:00:00

abstract：:Mechanisms that control the levels and activities of reactive oxygen species (ROS) in normal human mammary cells are poorly understood. We show that purified normal human basal mammary epithelial cells maintain low levels of ROS primarily by a glutathione-dependent but inefficient antioxidant mechanism that uses mitoc...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Kannan N,Nguyen LV,Makarem M,Dong Y,Shih K,Eirew P,Raouf A,Emerman JT,Eaves CJ

更新日期：2014-05-27 00:00:00

abstract：:The full primary structure of the very potent opioid peptide dynorphin, from porcine pituitary, has been determined. It is (H)Tyr-Gly-Gly-Phe-Leu-Arg-Arg-Ile-Arg-Pro-Lys-Leu-Lys-Trp-Asp-Asn-Gln(OH). The synthetic peptide with this sequence behaves identically to natural dynorphin in a number of ways, and it has the sa...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Goldstein A,Fischli W,Lowney LI,Hunkapiller M,Hood L

更新日期：1981-11-01 00:00:00

abstract：:Real-time visualization of intracellular calcium concentration ([Ca2+]i) changes in mammalian Purkinje cells in vitro, utilizing the dye Fura-2, indicates that calcium action potentials are generated in the dendritic tree and follow a particular activation sequence. During spontaneous oscillations or after direct curr...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Sugimori M,Llinás RR

更新日期：1990-07-01 00:00:00

abstract：:Oncogene-induced senescence (OIS) is a critical tumor-suppressing mechanism that restrains cancer progression at premalignant stages, in part by causing telomere dysfunction. Currently it is unknown whether this proliferative arrest presents a stable and therefore irreversible barrier to cancer progression. Here we de...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Patel PL,Suram A,Mirani N,Bischof O,Herbig U

更新日期：2016-08-23 00:00:00

abstract：:Previous studies have established that incubation of low density lipoprotein (LDL) with cultured endothelial cells (EC) converts it to a new form (EC-modified LDL) that is now recognized by a specific receptor on macrophages (the acetyl LDL receptor) and is taken up and degraded 3-10 times more rapidly than native LDL...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Parthasarathy S,Steinbrecher UP,Barnett J,Witztum JL,Steinberg D

更新日期：1985-05-01 00:00:00

abstract：:Ultraviolet photosensitivity of the single-stranded forms of poly(A) and poly(dA) is compared. In contrast to poly(A), poly(dA) is rather sensitive to ultraviolet irradiation. Relatively low doses of ultraviolet light lead to characteristic changes of the ultraviolet and circular dichroism spectra of poly(dA), suggest...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Pörschke D

更新日期：1973-09-01 00:00:00

abstract：:Central nervous system (CNS) trauma can result in tissue disruption, neuronal and axonal degeneration, and neurological dysfunction. The limited spontaneous CNS repair in adulthood and aging is often insufficient to overcome disability. Several investigations have demonstrated that targeting HDAC activity can protect ...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Rivieccio MA,Brochier C,Willis DE,Walker BA,D'Annibale MA,McLaughlin K,Siddiq A,Kozikowski AP,Jaffrey SR,Twiss JL,Ratan RR,Langley B

更新日期：2009-11-17 00:00:00

abstract：:There is considerable interest in engineering plant cell wall components, particularly lignin, to improve forage quality and biomass properties for processing to fuels and bioproducts. However, modifying lignin content and/or composition in transgenic plants through down-regulation of lignin biosynthetic enzymes can i...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Gallego-Giraldo L,Liu C,Pose-Albacete S,Pattathil S,Peralta AG,Young J,Westpheling J,Hahn MG,Rao X,Knox JP,De Meester B,Boerjan W,Dixon RA

更新日期：2020-02-11 00:00:00