Hydrogen bond-directed aggregation of diazadibenzoperylene dyes in low-polarity solvents and the solid state.

abstract：:Restriction site variation in DNA that encodes rRNA (rDNA) was surveyed among 714 offspring within 31 lineages (26 genotypes) of obligate asexually reproducing Taraxacum officinale (dandelions). Although clonal offspring are expected, plants with nonparental rDNA were produced from two parents that were themselves sib...

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

authors： King LM,Schaal BA

更新日期：1990-02-01 00:00:00

abstract：:Gametocytes are nonreplicative sexual forms that mediate malaria transmission to a mosquito vector. They are generated from asexual blood-stage parasites that proliferate in the circulation. However, little is known about how this transition is genetically regulated. Here, we report that an Apetala2 (AP2) family trans...

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

authors： Yuda M,Iwanaga S,Kaneko I,Kato T

更新日期：2015-10-13 00:00:00

abstract：:The Paleocene-Eocene Thermal Maximum (PETM) (∼56 Ma) was a ∼170,000-y (∼170-kyr) period of global warming associated with rapid and massive injections of 13C-depleted carbon into the ocean-atmosphere system, reflected in sedimentary components as a negative carbon isotope excursion (CIE). Carbon cycle modeling has ind...

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

authors： Frieling J,Svensen HH,Planke S,Cramwinckel MJ,Selnes H,Sluijs A

更新日期：2016-10-25 00:00:00

abstract：:In Xenopus oocytes injected with rat brain mRNA, as in neurons, glycine greatly potentiated responses of the N-methyl-D-aspartate (NMDA) type of excitatory amino acid receptor. Injected oocytes generated a partially desensitizing inward current in response to NMDA with 30 nM added glycine. As the added glycine concent...

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

authors： Lerma J,Zukin RS,Bennett MV

更新日期：1990-03-01 00:00:00

abstract：:Osmotic stress responses are critical not only to the survival of unicellular organisms but also to the normal function of the mammalian kidney. However, the extent to which cells outside the kidney rely on osmotic stress responses in vivo remains unknown. Nuclear factor of activated T cells 5 (NFAT5)/tonicity enhance...

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

authors： Go WY,Liu X,Roti MA,Liu F,Ho SN

更新日期：2004-07-20 00:00:00

abstract：:Bacteria commonly grow in densely populated surface-bound communities, termed biofilms, where they gain benefits including superior access to nutrients and resistance to environmental insults. The secretion of extracellular polymeric substances (EPS), which bind bacterial collectives together, is ubiquitously associat...

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

authors： Nadell CD,Bassler BL

更新日期：2011-08-23 00:00:00

abstract：:Mouse lymphocytic cells of the established line GF-14 were allowed to accumulate intracellular 3H-labeled aminoisobutyric acid (AIB), frozen, and stored over liquid N2. After internal radiation had reduced survival to 1 in 10(4), survivors were plated and tested for their ability to transport AIB. Out of 200 clones te...

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

authors： Finkelstein MC,Slayman CW,Adelberg EA

更新日期：1977-10-01 00:00:00

abstract：:TIM-4, a member of the TIM family expressed on antigen-presenting cells, binds to phosphatidylserine exposed on the surface of apoptotic bodies. However, the significance of this interaction in vivo remains unknown because other receptors have been implicated in the clearance of apoptotic bodies and could compensate f...

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

authors： Rodriguez-Manzanet R,Sanjuan MA,Wu HY,Quintana FJ,Xiao S,Anderson AC,Weiner HL,Green DR,Kuchroo VK

更新日期：2010-05-11 00:00:00

abstract：:Cryogenic fluorescent light microscopy of flash-frozen cells stands out by artifact-free fixation and very little photobleaching of the fluorophores used. To attain the highest level of resolution, aberration-free immersion objectives with accurately matched immersion media are required, but both do not exist for imag...

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

authors： Faoro R,Bassu M,Mejia YX,Stephan T,Dudani N,Boeker C,Jakobs S,Burg TP

更新日期：2018-02-06 00:00:00

abstract：:Clostridium perfringens iota-toxin (Ia) mono-ADP ribosylates Arg177 of actin, leading to cytoskeletal disorganization and cell death. To fully understand the reaction mechanism of arginine-specific mono-ADP ribosyl transferase, the structure of the toxin-substrate protein complex must be characterized. Recently, we so...

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

authors： Tsurumura T,Tsumori Y,Qiu H,Oda M,Sakurai J,Nagahama M,Tsuge H

更新日期：2013-03-12 00:00:00

abstract：:Vasopressin's action in renal cells to regulate water transport depends on protein phosphorylation. Here we used mass spectrometry-based quantitative phosphoproteomics to identify signaling pathways involved in the short-term V2-receptor-mediated response in cultured collecting duct cells (mpkCCD) from mouse. Using St...

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

authors： Rinschen MM,Yu MJ,Wang G,Boja ES,Hoffert JD,Pisitkun T,Knepper MA

更新日期：2010-02-23 00:00:00

abstract：:Heat shock factors (HSFs) are the master regulators of transcription under protein-damaging conditions, acting in an environment where the overall transcription is silenced. We determined the genomewide transcriptional program that is rapidly provoked by HSF1 and HSF2 under acute stress in human cells. Our results rev...

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

authors： Vihervaara A,Sergelius C,Vasara J,Blom MA,Elsing AN,Roos-Mattjus P,Sistonen L

更新日期：2013-09-03 00:00:00

abstract：:Mutations in profilin 1 (PFN1) are associated with amyotrophic lateral sclerosis (ALS); however, the pathological mechanism of PFN1 in this fatal disease is unknown. We demonstrate that ALS-linked mutations severely destabilize the native conformation of PFN1 in vitro and cause accelerated turnover of the PFN1 protein...

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

authors： Boopathy S,Silvas TV,Tischbein M,Jansen S,Shandilya SM,Zitzewitz JA,Landers JE,Goode BL,Schiffer CA,Bosco DA

更新日期：2015-06-30 00:00:00

abstract：:An expression vector containing the murine c-ets-2 protooncogene cDNA was introduced into NIH 3T3 cells by DNA transfection. The cells transfected with this construct showed foci of densely growing, morphologically altered cells, when grown either in low-serum (0.05%) or in serum-free medium. The c-ets-2-derived foci ...

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

authors： Seth A,Watson DK,Blair DG,Papas TS

更新日期：1989-10-01 00:00:00

abstract：:The structure of HIV-1 Psi-RNA has been elucidated by a concerted approach combining structural probes with mass spectrometric detection (MS3D), which is not affected by the size and crystallization properties of target biomolecules. Distance constraints from bifunctional cross-linkers provided the information require...

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

authors： Yu ET,Hawkins A,Eaton J,Fabris D

更新日期：2008-08-26 00:00:00

abstract：:Repeat proteins contain short, tandem arrays of simple structural motifs (20-40 aa). These stack together to form nonglobular structures that are stabilized by short-range interactions from residues close in primary sequence. Unlike globular proteins, they have few, if any, long-range nonlocal stabilizing interactions...

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

authors： Javadi Y,Main ER

更新日期：2009-10-13 00:00:00

abstract：:Genome-wide experiments often measure quantitative differences between treated and untreated cells to identify affected strains. For these studies, statistical models are typically used to determine significance cutoffs. We developed a method termed "CLIK" (Cutoff Linked to Interaction Knowledge) that overlays biologi...

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

authors： Dittmar JC,Pierce S,Rothstein R,Reid RJ

更新日期：2013-04-30 00:00:00

abstract：:The crystal structure of human angiogenin (reported in the preceding paper in this issue) reveals that the site that corresponds to the pyrimidine binding site of RNase A is obstructed by Gln-117. Mutation of this residue to Ala and Gly is here found to increase activity 11- to 18-fold and 21- to 30-fold, respectively...

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

authors： Russo N,Shapiro R,Acharya KR,Riordan JF,Vallee BL

更新日期：1994-04-12 00:00:00

abstract：:Regulated exocytosis requires tight coupling of the membrane fusion machinery to a triggering signal and a fast response time. Complexins are part of this regulation and, together with synaptotagmins, control calcium-dependent exocytosis. Stimulatory and inhibitory functions have been reported for complexins. To test ...

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

authors： Malsam J,Seiler F,Schollmeier Y,Rusu P,Krause JM,Söllner TH

更新日期：2009-02-10 00:00:00

abstract：:Inosine monophosphate dehydrogenase (IMPDH) controls a key metabolic step in the regulation of cell growth and differentiation. This step is the NAD-dependent oxidation of inosine 5' monophosphate (IMP) to xanthosine 5' monophosphate, the rate-limiting step in the synthesis of the guanine nucleotides. Two isoforms of ...

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

authors： Colby TD,Vanderveen K,Strickler MD,Markham GD,Goldstein BM

更新日期：1999-03-30 00:00:00

abstract：:We describe a method for predicting the structure of alpha beta class proteins in the absence of information from homologous structures. The method is based on an associative memory model for short to intermediate range in sequence contacts and a contact potential for long range in sequence contacts. The coefficients ...

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

authors： Hardin C,Eastwood MP,Prentiss MC,Luthey-Schulten Z,Wolynes PG

更新日期：2003-02-18 00:00:00

abstract：:Heterogeneous nucleation is vital to a wide range of areas as diverse as ice nucleation on atmospheric aerosols and the fabrication of high-performance thin films. There is excellent evidence that surface topography is a key factor in directing crystallization in real systems; however, the mechanisms by which nanoscal...

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

authors： Campbell JM,Meldrum FC,Christenson HK

更新日期：2017-01-31 00:00:00

abstract：:The expression of CD5 increases progressively as thymocytes mature. We have shown that CD5 expression is controlled by a tissue-specific regulatory promoter located upstream of the CD5 translation start sites. Deletion of this regulatory promoter, which contains three potential transcription factor binding sites (CCAA...

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

authors： Yang Y,Contag CH,Felsher D,Shachaf CM,Cao Y,Herzenberg LA,Herzenberg LA,Tung JW

更新日期：2004-03-16 00:00:00

abstract：:African trypanosomes are protected by a densely packed surface monolayer of variant surface glycoprotein (VSG). A haptoglobin-hemoglobin receptor (HpHbR) within this VSG coat mediates heme acquisition. HpHbR is also exploited by the human host to mediate endocytosis of trypanolytic factor (TLF)1 from serum, contributi...

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

authors： Higgins MK,Tkachenko O,Brown A,Reed J,Raper J,Carrington M

更新日期：2013-01-29 00:00:00

abstract：:Hypoxia-inducible factor-1 (HIF-1) plays an essential role in tumor development and progression by regulating genes that are vital for proliferation, glycolysis, angiogenesis, and metastasis. To identify strategies of targeting the HIF-1 pathway, we screened a siRNA library against the entire druggable genome and a sm...

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

authors： Lin X,David CA,Donnelly JB,Michaelides M,Chandel NS,Huang X,Warrior U,Weinberg F,Tormos KV,Fesik SW,Shen Y

更新日期：2008-01-08 00:00:00

abstract：:One of the factors required for the antiviral activity of the synthetic nucleoside, ribavirin (1-beta-D-ribofuranosyl-1,2,4-triazole-3-carboxamide), is the ability of the molecule to adopt the substrate conformation specified by the enzyme for which it is a competitive inhibitor, inosine 5'-phosphate dehydrogenase (IM...

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

authors： Miles DL,Miles DW,Redington P,Eyring H

更新日期：1976-12-01 00:00:00

abstract：:The specificity with which the genetic code is read in protein synthesis, and with which other highly specific biosynthetic reactions take place, can be increased above the level available from free energy differences in intermediates or kinetic barriers by a process defined here as kinetic proofreading. A simple kine...

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

authors： Hopfield JJ

更新日期：1974-10-01 00:00:00

abstract：:The thymus provides multiple microenvironments that are essential for the development and repertoire selection of T lymphocytes. The thymic cortex induces the generation and positive selection of T lymphocytes, whereas the thymic medulla establishes self-tolerance among the positively selected T lymphocytes. Cortical ...

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

authors： Ohigashi I,Zuklys S,Sakata M,Mayer CE,Zhanybekova S,Murata S,Tanaka K,Holländer GA,Takahama Y

更新日期：2013-06-11 00:00:00

abstract：:Novel organismal structures in metazoans are often undergirded by complex gene regulatory networks; as such, understanding the emergence of new structures through evolution requires reconstructing the series of evolutionary steps leading to these underlying networks. Here, we reconstruct the step-by-step assembly of t...

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

authors： Irimia M,Denuc A,Burguera D,Somorjai I,Martín-Durán JM,Genikhovich G,Jimenez-Delgado S,Technau U,Roy SW,Marfany G,Garcia-Fernàndez J

更新日期：2011-03-29 00:00:00

abstract：:Escherichia coli DnaJ functions as a typical molecular chaperone in coordination with other heat shock proteins such as DnaK and GrpE in a variety of cellular processes. In this study, it was found that E. coli possesses an analogue of DnaJ, as judged from not only its primary structure but also its possible function....

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

authors： Ueguchi C,Kakeda M,Yamada H,Mizuno T

更新日期：1994-02-01 00:00:00