Enzymatic oligomerization of bacteriophage P22 DNA and of linear Simian virus 40 DNA.

abstract：:The metal complex [(tpy)(Mebim-py)Ru(II)(S)](2+) (tpy = 2,2' : 6',2''-terpyridine; Mebim-py = 3-methyl-1-pyridylbenzimidazol-2-ylidene; S = solvent) is a robust, reactive electrocatalyst toward both water oxidation to oxygen and carbon dioxide reduction to carbon monoxide. Here we describe its use as a single electroc...

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

authors： Chen Z,Concepcion JJ,Brennaman MK,Kang P,Norris MR,Hoertz PG,Meyer TJ

更新日期：2012-09-25 00:00:00

abstract：:A new ribonuclease, RNase BN, has been identified and partially purified from a strain of Escherichia coli lacking RNase II and RNase D by using the artificial tRNA precursor tRNA-C-[14C]U as substrate. This enzyme is present in E. coli B but absent from the tRNA processing mutant strain BN which is unable to process ...

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

authors： Asha PK,Blouin RT,Zaniewski R,Deutscher MP

更新日期：1983-06-01 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

abstract：:The pathogenicity of fixed rabies virus strains for adult mice depends on the presence of an antigenic determinant on the viral glycoprotein. Two virus-neutralizing monoclonal antibodies have been used to identify this determinant. All pathogenic strains of fixed rabies virus bind to these antibodies and are neutraliz...

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

authors： Dietzschold B,Wunner WH,Wiktor TJ,Lopes AD,Lafon M,Smith CL,Koprowski H

更新日期：1983-01-01 00:00:00

abstract：:The identification of genes contributing to the adaptation of local populations is of great biological interest. In an attempt to characterize functionally important differences among African and non-African Drosophila melanogaster populations, we surveyed neutral microsatellite variation in an 850-kb genomic sequence...

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

authors： Harr B,Kauer M,Schlötterer C

更新日期：2002-10-01 00:00:00

abstract：:Indole-3-acetic acid is the major auxin in most plants. In Cruciferae, including Brassicaceae, indole-3-acetic acid is synthesized from indole-3-acetonitrile by nitrilase, after indole-3-acetonitrile is formed from tryptophan via indole-3-acetaldoxime or indole glycosinolates as the intermediate. We cloned and sequenc...

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

authors： Kobayashi M,Izui H,Nagasawa T,Yamada H

更新日期：1993-01-01 00:00:00

abstract：:The electrical currents at the surface of the proximal portion of an isolated and transected lamprey spinal cord were measured with an extracellular vibrating probe. Soon after transection, currents of about 0.5 mA/cm2 enter the cut surface of the spinal cord. These currents fall to about a quarter of their initial va...

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

authors： Borgens RB,Jaffe LF,Cohen MJ

更新日期：1980-02-01 00:00:00

abstract：:Plants can defend themselves from herbivorous insects by emitting volatile chemical signals that attract natural enemies of the herbivore. For example, maize seedlings attacked by beet armyworm larvae (Spodoptera exigua) produce a mixture of terpenoid and indole volatiles that serve to attract parasitic wasps. A key s...

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

authors： Shen B,Zheng Z,Dooner HK

更新日期：2000-12-19 00:00:00

abstract：:Wnt signaling regulates many aspects of development by increasing the signaling activity of beta-catenin. Axin is a negative regulator of the Wnt signaling pathway, and it is responsible for the formation of the beta-catenin degradation complex. Genetic studies with Drosophila suggest that Axin promotes cytoplasmic lo...

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

authors： Cong F,Varmus H

更新日期：2004-03-02 00:00:00

abstract：:Hydrogen/deuterium exchange followed by trapping of the labeled species in the aprotic solvent DMSO has been used to elucidate structure in both the burst-phase molten globule-folding intermediate of apomyoglobin and in an equilibrium intermediate that models the kinetic intermediate. Precise estimates can be made of ...

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

authors： Nishimura C,Dyson HJ,Wright PE

更新日期：2005-03-29 00:00:00

abstract：:Nuclease resistance and RNA affinity are key criteria in the search for optimal antisense nucleic acid modifications, but the origins of the various levels of resistance to nuclease degradation conferred by chemical modification of DNA and RNA are currently not understood. The 2'-O-aminopropyl (AP)-RNA modification di...

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

authors： Teplova M,Wallace ST,Tereshko V,Minasov G,Symons AM,Cook PD,Manoharan M,Egli M

更新日期：1999-12-07 00:00:00

abstract：:The blood-aqueous barrier plays a key role in regulating aqueous humor homeostasis by selectively restricting passage of proteins into the eye. The kinetics of aqueous flow are traditionally measured using artificial markers; however, these marker molecules do not address the barrier's selective permeability to plasma...

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

authors： Liu P,Thomson BR,Khalatyan N,Feng L,Liu X,Savas JN,Quaggin SE,Jin J

更新日期：2018-09-04 00:00:00

abstract：:Elucidating the mechanism of folding of polynucleotides depends on accurate estimates of free energy surfaces and a quantitative description of the kinetics of structure formation. Here, the kinetics of hairpin formation in single-stranded DNA are measured after a laser temperature jump. The kinetics are modeled as co...

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

authors： Ansari A,Kuznetsov SV,Shen Y

更新日期：2001-07-03 00:00:00

abstract：:The theory presented here is based on results from in vitro experiments and deals with three proteins in the postsynaptic density/membrane-namely, calmodulin, the Ca2+/calmodulin-dependent protein kinase, and the voltage-dependent Ca2+ channel. It is visualized that, in vivo in the polarized state of the membrane, cal...

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

authors： Siekevitz P

更新日期：1991-06-15 00:00:00

abstract：:Animals and plants use modified cell cycles to achieve particular developmental strategies. In one common example, most animals and plants have tissues in which the cells become polyploid or polytene by means of an S-G cycle, but the mechanism by which mitosis is inhibited in the endo cycle is not understood. The Dros...

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

authors： Kashevsky H,Wallace JA,Reed BH,Lai C,Hayashi-Hagihara A,Orr-Weaver TL

更新日期：2002-08-20 00:00:00

abstract：:DNA damage leads to a halt in proliferation owing to apoptosis or senescence, which prevents transmission of DNA alterations. This cellular response depends on the tumor suppressor p53 and functions as a powerful barrier to tumor development. Adult stem cells are resistant to DNA damage-induced apoptosis or senescence...

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

authors： Insinga A,Cicalese A,Faretta M,Gallo B,Albano L,Ronzoni S,Furia L,Viale A,Pelicci PG

更新日期：2013-03-05 00:00:00

abstract：:Prediction of the native tertiary structure of a globular protein from the primary sequence will require a potential energy model that can discriminate all nonnative structures from the native structure(s). A successful model must distinguish not only alternate structures that are very nonnative but also alternate str...

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

authors： Wang Y,Zhang H,Li W,Scott RA

更新日期：1995-01-31 00:00:00

abstract：:Type VI protein secretion system (T6SS) is important for bacterial competition through contact-dependent killing of competitors. T6SS delivers effectors to neighboring cells and corresponding antagonistic proteins confer immunity against effectors that are delivered by sister cells. Although T6SS has been found in mor...

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

authors： Dong TG,Ho BT,Yoder-Himes DR,Mekalanos JJ

更新日期：2013-02-12 00:00:00

abstract：:Receptor-interacting protein kinase 3 (RIPK3)-mediated necroptosis is thought to be the pathophysiologically predominant pathway that leads to regulated necrosis of parenchymal cells in ischemia-reperfusion injury (IRI), and loss of either Fas-associated protein with death domain (FADD) or caspase-8 is known to sensit...

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

authors： Linkermann A,Skouta R,Himmerkus N,Mulay SR,Dewitz C,De Zen F,Prokai A,Zuchtriegel G,Krombach F,Welz PS,Weinlich R,Vanden Berghe T,Vandenabeele P,Pasparakis M,Bleich M,Weinberg JM,Reichel CA,Bräsen JH,Kunzendorf U,An

更新日期：2014-11-25 00:00:00

abstract：:Although the apoptotic role of caspases has been largely understood, accumulating evidence in Drosophila suggests that caspases also control other processes than apoptotic cell death. However, how caspases contribute to the development of the mammalian nervous system remains obscure. Here, we provide unique evidence t...

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

authors： Ohsawa S,Hamada S,Kuida K,Yoshida H,Igaki T,Miura M

更新日期：2010-07-27 00:00:00

abstract：:Murine endothelial cells are readily transformed in a single step by the polyomavirus oncogene encoding middle-sized tumor antigen. These cells (bEND.3) form tumors (hemangiomas) in mice which are lethal in newborn animals. The bEND.3 cells rapidly proliferate in culture and express little or no thrombospondin 1 (TS1)...

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

authors： Sheibani N,Frazier WA

更新日期：1995-07-18 00:00:00

abstract：:Synthetic pheomelanins from enzymic oxidation of the 3,4-dihydroxyphenylalanine (dopa) derivative 5-S-cysteinyldopa have been examined by ESR spectroscopy. These alkalisoluble polymers contain a novel kind of free radical that is spectroscopically distinct from that found in eumelanins. Delocalization of the unpaired ...

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

authors： Sealy RC,Hyde JS,Felix CC,Menon IA,Prota G,Swartz HM,Persad S,Haberman HF

更新日期：1982-05-01 00:00:00

abstract：:We previously reconstituted Z rings in tubular multilamellar liposomes with FtsZ-YFP-mts, where mts is a membrane-targeting amphiphilic helix. These reconstituted Z rings generated a constriction force but did not divide the thick-walled liposomes. Here we developed a unique system to observe Z rings in unilamellar li...

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

authors： Osawa M,Erickson HP

更新日期：2013-07-02 00:00:00

abstract：:It is known from a variety of experimental systems that the ability of tumor cells to grow locally and metastasize can be affected by the presence of adjacent normal tissues and cells, particularly mesenchymally derived stromal cells such as fibroblasts. However, the comparative influence of such normal cell-tumor cel...

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

authors： Cornil I,Theodorescu D,Man S,Herlyn M,Jambrosic J,Kerbel RS

更新日期：1991-07-15 00:00:00

abstract：:The B-cell antigen receptor is composed of membrane immunoglobulin sheathed by an alpha/beta heterodimer. The complex is noncovalently associated with protein kinase activity, and crosslinking of the receptor leads to capping and transmembrane signaling. Here we show that the sheath is not necessary either for this ca...

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

authors： Williams GT,Peaker CJ,Patel KJ,Neuberger MS

更新日期：1994-01-18 00:00:00

abstract：:Elucidating the lineage relationships among different cell types is key to understanding human brain development. Here we developed parallel RNA and DNA analysis after deep sequencing (PRDD-seq), which combines RNA analysis of neuronal cell types with analysis of nested spontaneous DNA somatic mutations as cell lineag...

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

authors： Huang AY,Li P,Rodin RE,Kim SN,Dou Y,Kenny CJ,Akula SK,Hodge RD,Bakken TE,Miller JA,Lein ES,Park PJ,Lee EA,Walsh CA

更新日期：2020-06-23 00:00:00

abstract：:The sequence of oligonucleotides produced by the action of bleomycin and ferrous ion on double- and single-stranded DNA has been determined. In the presence of ferrous ion, bleomycin promotes cleavage at G-T and G-C sequences, while high concentrations of ferrous ion alone result in strand scission that is not base sp...

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

authors： Takeshita M,Grollman AP,Ohtsubo E,Ohtsubo H

更新日期：1978-12-01 00:00:00

abstract：:Fermions need to satisfy the Pauli exclusion principle: no two can be in the same state. This restriction is most compactly expressed in a second quantization formalism by the requirement that the creation and annihilation operators of the electrons satisfy anticommutation relations. The usual classical limit of quant...

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

authors： Levine RD

更新日期：2000-02-29 00:00:00

abstract：:The pyridoxal 5'-phosphate cofactor of glycogen phosphorylase a (1,4-alpha-D-glucan:orthophosphate alpha-glucosyltransferase, EC2.4.1.1.) has been positioned on the protomer with x-ray diffraction data, chemical markers, and sequence information. The electron density was computed from 3.0-A resolution phases calculate...

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

authors： Sygusch J,Madsen NB,Kasvinsky PJ,Fletterick RJ

更新日期：1977-11-01 00:00:00

abstract：:The expanding behavioral repertoire of the developing brain during childhood and adolescence is shaped by complex brain-environment interactions and flavored by unique life experiences. The transition into young adulthood offers opportunities for adaptation and growth but also increased susceptibility to environmental...

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

authors： Alnæs D,Kaufmann T,Marquand AF,Smith SM,Westlye LT

更新日期：2020-06-02 00:00:00