MicroRNA binding to the HIV-1 Gag protein inhibits Gag assembly and virus production.

abstract：:The composition, insertion, and turnover of externally disposed proteins on the macrophage plasma membrane were analyzed. Cells labeled with [35S]methionine were incubated with the nonpermeant reagent trinitrobenzene sulfonic acid to introduce the trinitrophenyl moiety on free amino groups of externally oriented membr...

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

authors： Kaplan G,Unkeless JC,Cohn ZA

更新日期：1979-08-01 00:00:00

abstract：:A construct, MRE-beta Geo, with five metal response elements fused to a selectable reporter gene was transfected into BHK cells and a stable clone that could be induced up to 100-fold by zinc, cadmium, bismuth, silver, cobalt, copper, mercury, or nickle was isolated. Some, and perhaps all, of these metals induce MRE-b...

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

authors： Palmiter RD

更新日期：1994-02-15 00:00:00

abstract：:Mus poschiavinus x M. musculus hybrids, which had seven metacentric chromosomes derived from the poschiavinus complement, were repeatedly backcrossed to M. musculus and selected for the chromosome carrying the H-2 complex. A line called T1/Klj was established which had one metacentric chromosome. It was shown by linka...

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

authors： Klein J

更新日期：1971-07-01 00:00:00

abstract：:A major question in plant physiology is how the large amount of sucrose made in leaves is transported to the rest of the plant. Although physiological, biochemical, and anatomical investigations have been performed in this field, to date there have been very few genetic studies. Using a reverse genetic screen, we have...

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

authors： Gottwald JR,Krysan PJ,Young JC,Evert RF,Sussman MR

更新日期：2000-12-05 00:00:00

abstract：:MAD2 inhibits the anaphase-promoting complex when chromosomes are unattached to the mitotic spindle. It acts as a tumor suppressor gene because MAD2+/-cells enter anaphase early and display chromosome instability, leading to the formation of lung tumors in mice. Complete MAD2 inactivation has not been identified in hu...

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

authors： Michel L,Diaz-Rodriguez E,Narayan G,Hernando E,Murty VV,Benezra R

更新日期：2004-03-30 00:00:00

abstract：:ApcMin (Min, multiple intestinal neoplasia) is a point mutation in the murine homolog of the APC gene. Min/+ mice develop multiple intestinal adenomas, as do humans carrying germ-line mutations in APC. Female mice carrying Min are also prone to develop mammary tumors. Min/+ mammary glands are more sensitive to chemica...

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

authors： Moser AR,Mattes EM,Dove WF,Lindstrom MJ,Haag JD,Gould MN

更新日期：1993-10-01 00:00:00

abstract：:Changes in levels of the newly discovered cytidine 3':5'-cyclic monophosphate (cyclic CMP) phosphodiesterase in some representative tissues (cerebral cortex, kidney, intestine, liver, heart, and lung) of guinea pigs from various developmental stages (fetus, neonate, pup, and adult) were studied and compared with those...

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

authors： Helfman DM,Brackett NL,Kuo JF

更新日期：1978-09-01 00:00:00

abstract：:We have isolated two genes, Hox-2.8 and Hox-2.9, from the mouse homeobox cluster Hox-2, located on chromosome 11. A 120-kilobase yeast artificial chromosome (YAC) containing a large region of the murine Hox-2 cluster, including 45 kilobases of sequence upstream of the most 5' gene, was cloned. The DNA sequence of the ...

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

authors： Rubock MJ,Larin Z,Cook M,Papalopulu N,Krumlauf R,Lehrach H

更新日期：1990-06-01 00:00:00

abstract：:Wild bees are highly valuable pollinators. Along with managed honey bees, they provide a critical ecosystem service by ensuring stable pollination to agriculture and wild plant communities. Increasing concern about the welfare of both wild and managed pollinators, however, has prompted recent calls for national evalua...

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

authors： Koh I,Lonsdorf EV,Williams NM,Brittain C,Isaacs R,Gibbs J,Ricketts TH

更新日期：2016-01-05 00:00:00

abstract：:Two groups of mutant clones were isolated from YI adrenocortical tumor cells. One group, Y1(Kin), exhibited altered cytosolic cyclic AMP-dependent protein kinase activity; the second group, Y1(Cyc), exhibited diminished corticotropin-responsive adenylate cyclase activity. Steroidogenic responses to corticotropin and c...

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

authors： Rae PA,Gutmann NS,Tsao J,Schimmer BP

更新日期：1979-04-01 00:00:00

abstract：:The hemoglobin oxidation Bohr effect below pH 7 is essentially proportional to the fraction of hemes oxidized, just as the ligation Bohr effect is proportional to fractional heme ligation. The reported nonlinear proton release during oxidation [(1965) J. Biol. Chem. 240, 3317-3324] is shown to be an artifact resulting...

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

authors： Hoffman BM,Bull C

更新日期：1976-03-01 00:00:00

abstract：:RNA from noninfectious virions produced by two established clonal lines of sarcoma positive-leukemia negative (S+L-)-transformed 3T3 cells has been characterized. RNA from virions or nucleoids of S+L--(C243) cells consisted of three to four sizes: +/-44 S (6%), 28 S (17%), 18 S (38%), and <18 S (39%). 28S virion RNA c...

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

authors： Phillips LA,Hollis VW Jr,Bassin RH,Fischinger PJ

更新日期：1973-10-01 00:00:00

abstract：:The global demand for food could double in another 40 y owing to growth in the population and food consumption per capita. To meet the world's future food and sustainability needs for biofuels and renewable materials, the production of starch-rich cereals and cellulose-rich bioenergy plants must grow substantially whi...

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

authors： You C,Chen H,Myung S,Sathitsuksanoh N,Ma H,Zhang XZ,Li J,Zhang YH

更新日期：2013-04-30 00:00:00

abstract：:It is well known that two regular tetrahedra can be combined with a single regular octahedron to tile (complete fill) three-dimensional Euclidean space . This structure was called the "octet truss" by Buckminster Fuller. It was believed that such a tiling, which is the Delaunay tessellation of the face-centered cubic ...

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

authors： Conway JH,Jiao Y,Torquato S

更新日期：2011-07-05 00:00:00

abstract：:Toxin-antitoxin systems are found in many bacterial chromosomes and plasmids with roles ranging from plasmid stabilization to biofilm formation and persistence. In these systems, the expression/activity of the toxin is counteracted by an antitoxin, which, in type I systems, is an antisense RNA. While the regulatory me...

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

authors： El Mortaji L,Tejada-Arranz A,Rifflet A,Boneca IG,Pehau-Arnaudet G,Radicella JP,Marsin S,De Reuse H

更新日期：2020-12-08 00:00:00

abstract：:Deleting an important active-site residue of diphtheria toxin, glutamic acid-148, reduces the toxin's ADP-ribosyltransferase activity by a factor of greater than 10(4). We considered using this mutation to construct a recombinant toxoid for expression by live attenuated vaccines and explored second-site mutations that...

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

authors： Killeen KP,Escuyer V,Mekalanos JJ,Collier RJ

更新日期：1992-07-01 00:00:00

abstract：:High levels of inbreeding cause populations to become composed of homozygous, inbred lines. High levels of homozygosity limit the effectiveness of recombination, and therefore, retard the rate of decay of linkage (gametic phase) disequilibrium (LD) among mutations. Inbreeding and recombination interact to shape the ex...

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

authors： Morrell PL,Toleno DM,Lundy KE,Clegg MT

更新日期：2005-02-15 00:00:00

abstract：:An enzyme that reduces methionine sulfoxide [Met(O)] residues in proteins [peptide Met(O) reductase (MsrA), EC 1.8.4.6; originally identified in Escherichia coli] was purified from bovine liver, and the cDNA encoding this enzyme was cloned and sequenced. The mammalian homologue of E. coli msrA (also called pmsR) cDNA ...

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

authors： Moskovitz J,Weissbach H,Brot N

更新日期：1996-03-05 00:00:00

abstract：:The brain continuously influences and perceives the physiological condition of the body. Related cortical representations have been proposed to shape emotional experience and guide behavior. Although previous studies have identified brain regions recruited during autonomic processing, neurological lesion studies have ...

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

authors： Guo CC,Sturm VE,Zhou J,Gennatas ED,Trujillo AJ,Hua AY,Crawford R,Stables L,Kramer JH,Rankin K,Levenson RW,Rosen HJ,Miller BL,Seeley WW

更新日期：2016-04-26 00:00:00

abstract：:The rpoN gene encoding the transcription factor sigma54 in Myxococcus xanthus has been cloned using a heterologous rpoN probe. The sequence of the cross-hybridizing DNA confirmed the existence of an ORF 1518 bp long that encodes a well conserved member of the sigma54 family of sigma factors. Low- as well as high-strin...

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

authors： Keseler IM,Kaiser D

更新日期：1997-03-04 00:00:00

abstract：:Phospholipids containing photolysable carbene precursors (beta-trifluoro-alpha-diazopropionoxy and m-diazirinophenoxy groups) in omega-positions of sn-2 fatty acyl chains were prepared. Photolysis of their vesicles produced crosslinked products in 40-60% yields. Crosslinking was mostly intermolecular and occurred by c...

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

authors： Gupta CM,Radhakrishnan R,Gerber GE,Olsen WL,Quay SC,Khorana HG

更新日期：1979-06-01 00:00:00

abstract：:Recent advances indicate that, in various chronic inflammatory disorders, the activation of the immune system is triggered locally rather than in lymphoid organs. In this study, we have evaluated whether the humoral alloimmune response involved in chronic rejection is elicited within the graft. We used the rat aortic ...

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

authors： Thaunat O,Field AC,Dai J,Louedec L,Patey N,Bloch MF,Mandet C,Belair MF,Bruneval P,Meilhac O,Bellon B,Joly E,Michel JB,Nicoletti A

更新日期：2005-10-11 00:00:00

abstract：:Interleukin 1 (IL-1) and tumor necrosis factor alpha are thought to contribute to the inflammatory response associated with autoimmune diseases. Transforming growth factor beta 1 (TGF-beta 1) counteracts many effects of these cytokines and has various immunosuppressive properties. In the present study, it is shown tha...

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

authors： Kuruvilla AP,Shah R,Hochwald GM,Liggitt HD,Palladino MA,Thorbecke GJ

更新日期：1991-04-01 00:00:00

abstract：:Perception and cognition in infants have been traditionally investigated using habituation paradigms, assuming that babies' memories in laboratory contexts are best constructed after numerous repetitions of the very same stimulus in the absence of interference. A crucial, yet open, question regards how babies deal wit...

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

authors： Benavides-Varela S,Siugzdaite R,Gómez DM,Macagno F,Cattarossi L,Mehler J

更新日期：2017-07-18 00:00:00

abstract：:The adult brain exhibits a local increase in cortical blood flow in response to external stimulus. However, broadly varying hemodynamic responses in the brains of newborn and young infants have been reported. Particular controversy exists over whether the "true" neonatal response to stimulation consists of a decrease ...

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

authors： Kozberg MG,Chen BR,DeLeo SE,Bouchard MB,Hillman EM

更新日期：2013-03-12 00:00:00

abstract：:We introduced radioactive precursors directly into identified neurons of Aplysia californica. [(3)H]-Choline and L-[(3)H]tryptophan were injected with pressure into nerve cell bodies to study synthesis of acetylcholine and serotonin. We confirmed the cholinergic nature of R2, L10, and L11, identified neurons of the ab...

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

authors： Eisenstadt M,Goldman JE,Kandel ER,Koike H,Koester J,Schwartz JH

更新日期：1973-12-01 00:00:00

abstract：:Mutagenic specificity of 2-acetylaminofluorene (AAF) has been established in mammalian cells and several strains of bacteria by using a shuttle plasmid vector containing a single N-(deoxyguanosin-8-yl)acetylaminofluorene (C8-dG-AAF) adduct. The nucleotide sequence of the gene conferring tetracycline resistance was mod...

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

authors： Moriya M,Takeshita M,Johnson F,Peden K,Will S,Grollman AP

更新日期：1988-03-01 00:00:00

abstract：:Prions are infectious agents which cause rapidly lethal neurodegenerative diseases in humans and animals following long, clinically silent incubation periods. They are composed of multichain assemblies of misfolded cellular prion protein. While it has long been assumed that prions are themselves neurotoxic, recent dev...

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

authors： Benilova I,Reilly M,Terry C,Wenborn A,Schmidt C,Marinho AT,Risse E,Al-Doujaily H,Wiggins De Oliveira M,Sandberg MK,Wadsworth JDF,Jat PS,Collinge J

更新日期：2020-09-22 00:00:00

abstract：:Spin-polarized charge currents induce magnetic tunnel junction (MTJ) switching by virtue of spin-transfer torque (STT). Recently, by taking advantage of the spin-dependent thermoelectric properties of magnetic materials, novel means of generating spin currents from temperature gradients, and their associated thermal-s...

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

authors： Pushp A,Phung T,Rettner C,Hughes BP,Yang SH,Parkin SS

更新日期：2015-05-26 00:00:00

abstract：:Thymidine dinucleotide (pTpT) stimulates melanogenesis in mammalian pigment cells and intact skin, mimicking the effects of UV irradiation and UV-mimetic DNA damage. Here it is shown that, in addition to tanning, pTpT induces a second photoprotective response, enhanced repair of UV-induced DNA damage. This enhanced re...

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

authors： Eller MS,Maeda T,Magnoni C,Atwal D,Gilchrest BA

更新日期：1997-11-11 00:00:00