Fungal prion HET-s as a model for structural complexity and self-propagation in prions.

abstract：:Several lines of evidence suggest that the mixed lineage leukemia protein (MLL, ALL-1, HRX) plays a role in regulating myelomonocytic differentiation. In this study we examined the effect of expression of MLL-AF9 on differentiation of the monoblastic U937 cell line by using a tetracycline-inducible expression system. ...

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

authors： Caslini C,Shilatifard A,Yang L,Hess JL

更新日期：2000-03-14 00:00:00

abstract：:Aconitase (Aco1p) is a multifunctional protein: It is an enzyme of the tricarboxylic acid cycle. In animal cells, Aco1p also is a cytosolic protein binding to mRNAs to regulate iron metabolism. In yeast, Aco1p was identified as a component of mtDNA nucleoids. Here we show that yeast Aco1p protects mtDNA from excessive...

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

authors： Chen XJ,Wang X,Butow RA

更新日期：2007-08-21 00:00:00

abstract：:Experiments were designed to determine the interrelationship between cyclic AMP and Ca(2+) during the processes of sperm capacitation and the acrosome reaction. In minimal culture media containing pyruvate and lactate as substrates, guinea pig spermatozoa required a minimum of 1.0-1.5 hr to capacitate in the presence ...

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

authors： Hyne RV,Garbers DL

更新日期：1979-11-01 00:00:00

abstract：:Infant acute lymphoblastic leukemia (ALL) with MLL gene rearrangements is characterized by early pre-B phenotype (CD10(-)/CD19(+)) and poor treatment outcome. The t(4;11), creating MLL-AF4 chimeric transcripts, is the predominant 11q23 chromosome translocation in infant ALL and is associated with extremely poor progno...

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

authors： Taki T,Kano H,Taniwaki M,Sako M,Yanagisawa M,Hayashi Y

更新日期：1999-12-07 00:00:00

abstract：:We have constructed and characterized a polyoma virus-based plasmid that is maintained as an autonomously replicating extrachromosomal element (episome) in mouse embryonic stem (ES) cells. Plasmid pMGD20neo contains the polyoma origin of replication harboring a mutated enhancer (PyF101), a modified polyoma early regio...

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

authors： Gassmann M,Donoho G,Berg P

更新日期：1995-02-28 00:00:00

abstract：:The nature of integrated viral DNA in normal and leukemic chicken cells has been studied by sequential nucleic acid hybridization procedures that localize the viral specific DNA in cellular DNA regions differing in reiteration frequency. First, DNA.DNA reassociation was employed to fractionate cellular DNA sequences a...

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

authors： Evans RM,Baluda MA,Shoyab M

更新日期：1974-08-01 00:00:00

abstract：:The amino-terminal sequences of two polypeptides with nonsuppressible insulin-like and cell-growth-promoting activities (NSILA I and II), isolated from human serum, were determined. Of the first 31 residues, 22 are identical in NSILA I and II. Moreover, a striking structural similarity was found between NSILA and insu...

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

authors： Rinderknecht E,Humbel RE

更新日期：1976-12-01 00:00:00

abstract：:Infectious vesicular stomatitis virus (VSV), the prototypic nonsegmented negative-strand RNA virus, was recovered from a full-length cDNA clone of the viral genome. Bacteriophage T7 RNA polymerase expressed from a recombinant vaccinia virus was used to drive the synthesis of a genome-length positive-sense transcript o...

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

authors： Whelan SP,Ball LA,Barr JN,Wertz GT

更新日期：1995-08-29 00:00:00

abstract：:Cells are wrapped in inelastic membranes, yet they can sustain large mechanical strains by regulating their area. The area regulation in cells is achieved either by membrane folding or by membrane exo- and endocytosis. These processes involve complex morphological transformations of the cell membrane, i.e., invaginati...

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

authors： Staykova M,Holmes DP,Read C,Stone HA

更新日期：2011-05-31 00:00:00

abstract：:Bone morphogenetic protein 4 (BMP-4) induces ventral mesoderm but represses dorsal mesoderm formation in Xenopus embryos. We show that BMP-4 inhibits two signaling pathways regulating dorsal mesoderm formation, the induction of dorsal mesoderm (Spemann organizer) and the dorsalization of ventral mesoderm. Ectopic expr...

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

authors： Re'em-Kalma Y,Lamb T,Frank D

更新日期：1995-12-19 00:00:00

abstract：:Oxidation of genomic DNA forms the guanine lesion 7,8-dihydro-8-oxoguanine (8-oxoG). When in the template base position during DNA synthesis the 8-oxoG lesion has dual coding potential by virtue of its anti- and syn-conformations, base pairing with cytosine and adenine, respectively. This impacts mutagenesis, because ...

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

authors： Batra VK,Shock DD,Beard WA,McKenna CE,Wilson SH

更新日期：2012-01-03 00:00:00

abstract：:With the collapse of fisheries in many parts of the world causing widespread economic harm, attention is focused on a possible cause and remedy of fishery collapse. Economic theory for managing a renewable resource, such as a fishery, leads to an ecologically unstable equilibrium as difficult to maintain as balancing ...

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

authors： Roughgarden J,Smith F

更新日期：1996-05-14 00:00:00

abstract：:We have found that in the gill- and siphon- withdrawal reflex of Aplysia, the memory for short-term sensitization grades smoothly into long-term memory with increased amounts of sensitization training. One cellular locus for the storage of the memory underlying short-term sensitization is the set of monosynaptic conne...

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

authors： Frost WN,Castellucci VF,Hawkins RD,Kandel ER

更新日期：1985-12-01 00:00:00

abstract：:Topological state of matter and lithium batteries are currently two hot topics in science and technology. Here we combine these two by exploring the possibility of using all-carbon-based porous topological semimetal for lithium battery anode material. Based on density-functional theory and the cluster-expansion method...

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

authors： Liu J,Wang S,Sun Q

更新日期：2017-01-24 00:00:00

abstract：:p38 mitogen-activated protein kinase (MAPK) regulates cytokines in arthritis and is, in turn, regulated by MAPK kinase (MKK) 3 and MKK6. To modulate p38 function but potentially minimize toxicity, we evaluated the utility of targeting MKK3 by using MKK3(-/-) mice. These studies showed that TNF-alpha increased phosphor...

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

authors： Inoue T,Boyle DL,Corr M,Hammaker D,Davis RJ,Flavell RA,Firestein GS

更新日期：2006-04-04 00:00:00

abstract：:Several disulfide benzamides have been shown to possess wide-spectrum antiretroviral activity in cell culture at low micromolar to submicromolar concentrations, inhibiting human immunodeficiency virus (HIV) type 1 (HIV-1) clinical and drug-resistant strains along with HIV-2 and simian immunodeficiency virus [Rice, W. ...

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

authors： Tummino PJ,Scholten JD,Harvey PJ,Holler TP,Maloney L,Gogliotti R,Domagala J,Hupe D

更新日期：1996-02-06 00:00:00

abstract：:Monoclonal antibodies against the porcine 1,25-dihydroxyvitamin D3 receptor were immobilized on Sepharose CL-4B and used to obtain a highly purified 1,25-dihydroxyvitamin D3 receptor fraction with a 45% recovery of the 1,25-dihydroxyvitamin D3 binding capacity. The porcine receptor was purified to homogeneity by prepa...

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

authors： Brown TA,Prahl JM,DeLuca HF

更新日期：1988-04-01 00:00:00

abstract：:Enteritis caused by Clostridium difficile toxin (Tx) is a nosocomial disease of increasing clinical concern, but the local mediators of C. difficile TxA inflammation are unknown. The potent vasodilator calcitonin gene-related peptide mediates neurogenic inflammation via the calcitonin receptor-like receptor (CLR). Her...

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

authors： Bhargava A,Clifton MS,Mhaske P,Liao M,Pothoulakis C,Leeman SE,Grady EF

更新日期：2013-01-08 00:00:00

abstract：:Whether mitotic structures like the centrosome can self-organize from the regulated mobility of their dynamic protein components remains unclear. Here, we combine fluorescence spectroscopy and chemical genetics to study in living cells the diffusion of polo-like kinase 1 (PLK1), an enzyme critical for centrosome matur...

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

authors： Mahen R,Jeyasekharan AD,Barry NP,Venkitaraman AR

更新日期：2011-05-31 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：:Intracellular granules in several types of leukocytes contain preformed proteins whose secretions contribute to immune and inflammatory functions of leukocytes, including eosinophils, cells notably associated with asthma, allergic inflammation, and helminthic infections. Cytokines and chemokines typically elicit extra...

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

authors： Neves JS,Perez SA,Spencer LA,Melo RC,Reynolds L,Ghiran I,Mahmudi-Azer S,Odemuyiwa SO,Dvorak AM,Moqbel R,Weller PF

更新日期：2008-11-25 00:00:00

abstract：:The photopigment melanopsin supports reflexive visual functions in people, such as pupil constriction and circadian photoentrainment. What contribution melanopsin makes to conscious visual perception is less studied. We devised a stimulus that targeted melanopsin separately from the cones using pulsed (3-s) spectral m...

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

authors： Spitschan M,Bock AS,Ryan J,Frazzetta G,Brainard DH,Aguirre GK

更新日期：2017-11-14 00:00:00

abstract：:Three lines of evidence indicate that RNA-dependent RNA synthesis occurs in mouse erythroleukemia cells. The first involves labeling studies with [3H]uridine and shows a greater initial labeling rate of globin RNA in the cytoplasm than in the nucleus. Labeled globin RNA found in the cytoplasm after a very short pulse ...

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

authors： Volloch V

更新日期：1986-03-01 00:00:00

abstract：:The DNA polymerase enzymes from avian, murine, and feline RNA tumor viruses can be distinguished by their ability to read specific, synthetic primertemplates. The copying of templates containing adenylic and thymidylic acids by all these DNA polymerases is inhibited by ethidium bromide, though this compound affects th...

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

authors： Fridlender B,Weissbach A

更新日期：1971-12-01 00:00:00

abstract：:Purified diphtheria toxin is shown to inhibit protein synthesis in Ehrlich-Lettré ascites carcinoma cells in vitro. Protein synthesis in Ehrlich-Lettré cells is at least 10,000 times more sensitive to toxin than protein synthesis in normal mouse spleen or thymus cells. This sensitivity correlates with the observation ...

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

authors： Iglewski BH,Rittenberg MB

更新日期：1974-07-01 00:00:00

abstract：:The association between poor paternal diet, perturbed embryonic development, and adult offspring ill health represents a new focus for the Developmental Origins of Health and Disease hypothesis. However, our understanding of the underlying mechanisms remains ill-defined. We have developed a mouse paternal low-protein ...

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

authors： Watkins AJ,Dias I,Tsuro H,Allen D,Emes RD,Moreton J,Wilson R,Ingram RJM,Sinclair KD

更新日期：2018-10-02 00:00:00

abstract：:We use sequential large-scale crawl data to empirically investigate and validate the dynamics that underlie the evolution of the structure of the web. We find that the overall structure of the web is defined by an intricate interplay between experience or entitlement of the pages (as measured by the number of inbound ...

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

authors： Kong JS,Sarshar N,Roychowdhury VP

更新日期：2008-09-16 00:00:00

abstract：:The human Bernard-Soulier syndrome is an autosomal recessive disorder of platelet dysfunction presenting with mild thrombocytopenia, circulating "giant" platelets and a bleeding phenotype. The bleeding in patients with the Bernard-Soulier syndrome is disproportionately more severe than suggested by the reduced platele...

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

authors： Ware J,Russell S,Ruggeri ZM

更新日期：2000-03-14 00:00:00

abstract：:Cell membrane proteins synthesized after infection of Escherichia coli B with wild-type phage T4 and rIIA mutants were analyzed by dodecyl sulfate-polyacrylamide gel electrophoresis. A protein with an approximate molecular weight of 74,000 is present in membranes isolated from T4r(+)-infected cells, but is not found i...

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

authors： Ennis HL,Kievitt KD

更新日期：1973-05-01 00:00:00

abstract：:Both polarities of the satellite RNA of tobacco ringspot virus are sources of self-cleaving sequences. RNA of the less abundant, negative polarity, designated sTobRV-(-)RNA, has cleaving activity that was mapped previously to two noncontiguous regions of the polyribonucleotide chain. Endoribonucleolytic oligoribonucle...

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

authors： Feldstein PA,Buzayan JM,van Tol H,deBear J,Gough GR,Gilham PT,Bruening G

更新日期：1990-04-01 00:00:00