Genomic analysis of uncultured marine viral communities.

abstract：:Several different families of DNA viruses encode proteins that inactivate the cellular retinoblastoma tumor suppressor protein (pRb), which normally functions to bind E2F transcription factors and restrict expression of genes necessary for cellular processes including DNA replication. Human cytomegalovirus (HCMV) UL97...

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

authors： Kamil JP,Hume AJ,Jurak I,Münger K,Kalejta RF,Coen DM

更新日期：2009-09-29 00:00:00

abstract：:The poison frogs (family Dendrobatidae) are terrestrial anuran amphibians displaying a wide range of coloration and toxicity. These frogs generally have been considered to be aposematic, but relatively little research has been carried out to test the predictions of this hypothesis. Here we use a comparative approach t...

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

authors： Summers K,Clough ME

更新日期：2001-05-22 00:00:00

abstract：:In 1989, populations of North American gypsy moth, Lymantria dispar, in seven contiguous northeastern states were severely reduced by a fungal pathogen. Based on morphology, development, and pathology, this organism appeared to be Entomophaga maimaiga. We have now used allozyme and restriction fragment length polymorp...

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

authors： Hajek AE,Humber RA,Elkinton JS,May B,Walsh SR,Silver JC

更新日期：1990-09-01 00:00:00

abstract：:During sporulation of the Gram-positive bacterium Bacillus subtilis, transcription of genes encoding spore coat proteins in the mother-cell compartment of the sporangium is controlled by RNA polymerase containing the sigma subunit called sigma K. Based on comparison of the N-terminal amino acid sequence of sigma K wit...

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

authors： Lu S,Halberg R,Kroos L

更新日期：1990-12-01 00:00:00

abstract：:Maintenance of genomic stability is essential for normal organismal development and is vital to prevent diseases such as cancer. As genetic information is packaged into chromatin, it has become increasingly clear that the chromatin environment plays an important role in DNA damage response. However, how DNA repair is ...

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

authors： Li X,Liu L,Yang S,Song N,Zhou X,Gao J,Yu N,Shan L,Wang Q,Liang J,Xuan C,Wang Y,Shang Y,Shi L

更新日期：2014-05-13 00:00:00

abstract：:On April 20, 2010, the Deepwater Horizon (DWH) blowout occurred, releasing more oil than any accidental spill in history. Oil release continued for 87 d and much of the oil and gas remained in, or returned to, the deep sea. A coral community significantly impacted by the spill was discovered in late 2010 at 1,370 m de...

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

authors： Fisher CR,Hsing PY,Kaiser CL,Yoerger DR,Roberts HH,Shedd WW,Cordes EE,Shank TM,Berlet SP,Saunders MG,Larcom EA,Brooks JM

更新日期：2014-08-12 00:00:00

abstract：:The effects of adenosine and adenosine analogs on adenylate cyclases from several tissues have been examined. Two adenosine-reactive sites have been identified: (i) the "R" site, occupancy of which usually leads to activation of cyclase and which requires integrity of the ribose ring for activity, and (ii) the "P" sit...

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

authors： Londos C,Wolff J

更新日期：1977-12-01 00:00:00

abstract：:Fungal cell walls and fragments thereof (elicitors) induce the formation of low and high molecular weight defense compounds in plant cell suspension cultures. This induced synthesis requires a signal molecule transmitting the message between the elicitor plant cell wall receptor and gene activation. We demonstrate in ...

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

authors： Mueller MJ,Brodschelm W,Spannagl E,Zenk MH

更新日期：1993-08-15 00:00:00

abstract：:A modification of the polymerase chain reaction has been used to establish the fact that a collection of Staphylococcus aureus toxins are "superantigens," each of which interacts with the T-cell alpha beta receptor of human T cells by means of a specific set of V beta elements. ...

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

authors： Choi YW,Kotzin B,Herron L,Callahan J,Marrack P,Kappler J

更新日期：1989-11-01 00:00:00

abstract：:The tendency for genetic architectures to exhibit epistasis among mutations plays a central role in the modern synthesis of evolutionary biology and in theoretical descriptions of many evolutionary processes. Nevertheless, few studies unquestionably show whether, and how, mutations typically interact. Beneficial mutat...

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

authors： Sanjuán R,Moya A,Elena SF

更新日期：2004-10-26 00:00:00

abstract：:The signals required for rapid internalization of the bovine cation-dependent mannose 6-phosphate receptor have been localized to two distinct regions of the 67-amino acid cytoplasmic domain. One signal includes phenylalanine 13 and phenylalanine 18, while the other involves tyrosine 45. The former signal is more pote...

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

authors： Johnson KF,Chan W,Kornfeld S

更新日期：1990-12-01 00:00:00

abstract：:Transgenic mice have provided invaluable information about gene function and regulation. However, because of marked differences between rodents and primates, some areas of human biology such as early embryonic development, aging, and maternal-fetal interactions would be best studied in a nonhuman primate model. Here, ...

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

authors： Wolfgang MJ,Eisele SG,Browne MA,Schotzko ML,Garthwaite MA,Durning M,Ramezani A,Hawley RG,Thomson JA,Golos TG

更新日期：2001-09-11 00:00:00

abstract：:In the presence of phenylalanine, GTP cyclohydrolase I feedback regulatory protein (GFRP) forms a stimulatory 360-kDa complex with GTP cyclohydrolase I (GTPCHI), which is the rate-limiting enzyme in the biosynthesis of tetrahydrobiopterin. The crystal structure of the stimulatory complex reveals that the GTPCHI decame...

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

authors： Maita N,Okada K,Hatakeyama K,Hakoshima T

更新日期：2002-02-05 00:00:00

abstract：:The human major histocompatibility complex includes approximately 14 class II HLA genes within the HLA-D region, most of which exist in multiple allelic forms. One of these genes, the DQ3.2 beta gene, accounts for the well-documented association of HLA-DR4 with insulin-dependent diabetes mellitus and is the single all...

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

authors： Kwok WW,Lotshaw C,Milner EC,Knitter-Jack N,Nepom GT

更新日期：1989-02-01 00:00:00

abstract：:Glutamate transporters clear synaptically released glutamate to maintain precise communication between neurons and limit glutamate neurotoxicity. Although much progress has been made on the topology, structure, and function of these carriers, few studies have addressed large-scale structural motions collectively assoc...

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

authors： Jiang J,Shrivastava IH,Watts SD,Bahar I,Amara SG

更新日期：2011-09-13 00:00:00

abstract：:The motion and mixing of granular media are observed in several contexts in nature, often displaying striking similarities to liquids. Granular dynamics occur in geological phenomena and also enable technologies ranging from pharmaceuticals production to carbon capture. Here, we report the discovery of a family of gra...

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

authors： McLaren CP,Kovar TM,Penn A,Müller CR,Boyce CM

更新日期：2019-05-07 00:00:00

abstract：:Collagen fibrils can exceed thousands of microns in length and are therefore the longest, largest, and most size-pleomorphic protein polymers in vertebrates; thus, knowing how cells transport collagen fibrils is essential for a more complete understanding of protein transport and its role in tissue morphogenesis. Here...

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

authors： Kalson NS,Starborg T,Lu Y,Mironov A,Humphries SM,Holmes DF,Kadler KE

更新日期：2013-12-03 00:00:00

abstract：:Phylogenetic comparison of rRNA sequences has suggested that a pseudoknot structure exists in the central domain of small-subunit rRNA. In Escherichia coli 16S rRNA, this pseudoknot would form when positions 570 and 571 pair with positions 865 and 866. Mutations were introduced into this pseudoknot at the phylogenetic...

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

authors： Vila A,Viril-Farley J,Tapprich WE

更新日期：1994-11-08 00:00:00

abstract：:The nucleotide sequence of a 1,163-base-pair fragment that encodes the entire thyA gene of Escherichia coli K-12 was determined. The strategy involved sequence determination of both DNA strands by using overlapping deletions that had been generated in vitro from the two ends of the fragment with BAL-31 nuclease. The a...

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

authors： Belfort M,Maley G,Pedersen-Lane J,Maley F

更新日期：1983-08-01 00:00:00

abstract：:By using a simplified model of small open liquid-like clusters with surface effects, in the gas phase, it is shown how the statistical thermodynamics of small systems can be extended to include metastable supersaturated gaseous states not too far from the gas-liquid equilibrium transition point. To accomplish this, on...

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

authors： Hill TL,Chamberlin RV

更新日期：1998-10-27 00:00:00

abstract：:Nerve growth factor has been quantified by both bioassay and radial immunodiffusion in mouse saliva elicited by several secretagogues. The concentrations by bioassay of nerve growth factor in both epinephrine- and norepinephrine-induced saliva (3400 and 900 mug/ml, respectively) are higher than reported in any other s...

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

authors： Wallace LJ,Partlow LM

更新日期：1976-11-01 00:00:00

abstract：:The rise of inorganic-biological hybrid organisms for solar-to-chemical production has spurred mechanistic investigations into the dynamics of the biotic-abiotic interface to drive the development of next-generation systems. The model system, Moorella thermoacetica-cadmium sulfide (CdS), combines an inorganic semicond...

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

authors： Kornienko N,Sakimoto KK,Herlihy DM,Nguyen SC,Alivisatos AP,Harris CB,Schwartzberg A,Yang P

更新日期：2016-10-18 00:00:00

abstract：:The expansion of machine learning to high-stakes application domains such as medicine, finance, and criminal justice, where making informed decisions requires clear understanding of the model, has increased the interest in interpretable machine learning. The widely used Classification and Regression Trees (CART) have ...

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

authors： Luna JM,Gennatas ED,Ungar LH,Eaton E,Diffenderfer ES,Jensen ST,Simone CB 2nd,Friedman JH,Solberg TD,Valdes G

更新日期：2019-10-01 00:00:00

abstract：:Natural environments can present diverse challenges, but some genotypes remain fit across many environments. Such "generalists" can be hard to evolve, outcompeted by specialists fitter in any particular environment. Here, inspired by the search for broadly neutralizing antibodies during B cell affinity maturation, we ...

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

authors： Sachdeva V,Husain K,Sheng J,Wang S,Murugan A

更新日期：2020-06-09 00:00:00

abstract：:Dimerization of human immunodeficiency virus type 1 protease (HIV-1 PR) monomers is an essential prerequisite for viral proteolytic activity and the subsequent generation of infectious virus particles. Disruption of the dimer interface inhibits this activity as does formation of heterodimers between wild-type and defe...

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

authors： McPhee F,Good AC,Kuntz ID,Craik CS

更新日期：1996-10-15 00:00:00

abstract：:The unfolded protein response (UPR) is an evolutionarily conserved mechanism by which all eukaryotic cells adapt to the accumulation of unfolded proteins in the endoplasmic reticulum (ER). Inositol-requiring kinase 1 (IRE1) and PKR-related ER kinase (PERK) are two type I transmembrane ER-localized protein kinase recep...

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

authors： Zhou J,Liu CY,Back SH,Clark RL,Peisach D,Xu Z,Kaufman RJ

更新日期：2006-09-26 00:00:00

abstract：:Maturation of Asn-linked oligosaccharides in the eukaryotic secretory pathway requires the trimming of nascent glycan chains to remove all glucose and several mannose residues before extension into complex-type structures on the cell surface and secreted glycoproteins. Multiple glycoside hydrolase family 47 (GH47) α-m...

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

authors： Xiang Y,Karaveg K,Moremen KW

更新日期：2016-12-06 00:00:00

abstract：:The neuropeptide oxytocin has played an essential role in the regulation of social behavior and attachment throughout mammalian evolution. Because recent studies in humans have shown that oxytocin administration reduces stress responses and increases prosocial behavior, we investigated whether a common single nucleoti...

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

authors： Chen FS,Kumsta R,von Dawans B,Monakhov M,Ebstein RP,Heinrichs M

更新日期：2011-12-13 00:00:00

abstract：:Explanted mouse blastocysts were microinjected in the blastocoel cavity with simian virus 40 (SV40) viral DNA. After surgical transfer to the uteri of pseudopregnant surrogate mothers, approximately 40% of the blastocysts developed to term and became healthy adults without apparent tumors at 1 year of age. Molecular h...

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

authors： Jaenisch R,Mintz B

更新日期：1974-04-01 00:00:00

abstract：:It is shown that, under certain standard assumptions, such as extended Riemann hypotheses, the scattering matrix varphi(s) for generic Gamma

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

authors： Deshouillers JM,Iwaniec H,Phillips RS,Sarnak P

更新日期：1985-06-01 00:00:00