Carbon dioxide fixation as a central redox cofactor recycling mechanism in bacteria.

abstract：:We have screened about 1.4 million colonies of Escherichia coli K-12 for their ability to grow on nutrient agar at 30 degrees and 41 degrees. Among the 2266 temperature-sensitive mutants found, 110 were defective in DNA synthesis but not in protein synthesis at 41 degrees. Three of these dna mutations mapped at two pr...

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

authors： Sevastopoulos CG,Wehr CT,Glaser DA

更新日期：1977-08-01 00:00:00

abstract：:We present molecular dating analyses for land plants that incorporate 33 fossil calibrations, permit rates of molecular evolution to be uncorrelated across the tree, and take into account uncertainties in phylogenetic relationships and the fossil record. We attached a prior probability to each fossil-based minimum age...

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

authors： Smith SA,Beaulieu JM,Donoghue MJ

更新日期：2010-03-30 00:00:00

abstract：:Four mouse POU domain genomic DNA clones--Brain-1, Brain-2, Brain-4, and Scip--and Brain-2 cDNA, which are expressed in adult brain, were cloned and the coding and noncoding regions of the genes were sequenced. The amino acid sequences of the four POU domains are highly conserved; sequences in other regions of the pro...

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

authors： Hara Y,Rovescalli AC,Kim Y,Nirenberg M

更新日期：1992-04-15 00:00:00

abstract：:We introduce a model of evolution in which competing organisms are represented by percolation lattice models. Fitness is based on the number of occupied sites remaining after removing a cluster connected to a randomly selected site. High-fitness individuals arising through mutation and selection must trade off density...

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

authors： Zhou T,Carlson JM,Doyle J

更新日期：2002-02-19 00:00:00

abstract：:The peroxidase-catalyzed aerobic oxidation of a linear aldehyde, leading to the next lower homologue in the triplet state, is accompanied by Norrish type II product ethylene when the substrate is pentanal. This system appears to provide an example of "photobiochemistry without light" because ethylene is a plant hormon...

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

authors： Knudsen FD,Campa A,Stefani HA,Cilento G

更新日期：1994-01-04 00:00:00

abstract：:Clostridium ljungdahlii is an anaerobic homoacetogen, able to ferment sugars, other organic compounds, or CO(2)/H(2) and synthesis gas (CO/H(2)). The latter feature makes it an interesting microbe for the biotech industry, as important bulk chemicals and proteins can be produced at the expense of CO(2), thus combining...

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

authors： Köpke M,Held C,Hujer S,Liesegang H,Wiezer A,Wollherr A,Ehrenreich A,Liebl W,Gottschalk G,Dürre P

更新日期：2010-07-20 00:00:00

abstract：:Degradation of the most abundant membrane protein on earth, the light-harvesting complex of Photosystem II (LHC II), is highly regulated under various environmental conditions, e.g., light stress, to prevent photochemical damage to the reaction center. We identified the LHC II degrading protease in Arabidopsis thalian...

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

authors： Zelisko A,García-Lorenzo M,Jackowski G,Jansson S,Funk C

更新日期：2005-09-20 00:00:00

abstract：:Tolerance and resistance provide hosts with two distinct defense strategies against parasitism. In resistance the hosts "fight" the parasite directly, whereas in tolerance the hosts fight the disease by ameliorating the damage that infection causes. There is increasing recognition that the two mechanisms may exhibit v...

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

authors： Best A,White A,Boots M

更新日期：2008-12-30 00:00:00

abstract：:During brain maturation, the occurrence of the extracellular matrix (ECM) terminates juvenile plasticity by mediating structural stability. Interestingly, enzymatic removal of the ECM restores juvenile forms of plasticity, as for instance demonstrated by topographical reconnectivity in sensory pathways. However, to wh...

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

authors： Happel MF,Niekisch H,Castiblanco Rivera LL,Ohl FW,Deliano M,Frischknecht R

更新日期：2014-02-18 00:00:00

abstract：:Climate change due to anthropogenic greenhouse gas emissions is expected to increase the frequency and intensity of precipitation events, which is likely to affect the probability of flooding into the future. In this paper we use river flow simulations from nine global hydrology and land surface models to explore unce...

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

authors： Dankers R,Arnell NW,Clark DB,Falloon PD,Fekete BM,Gosling SN,Heinke J,Kim H,Masaki Y,Satoh Y,Stacke T,Wada Y,Wisser D

更新日期：2014-03-04 00:00:00

abstract：:The embryonic sites in which progenitors of the hematopoietic lineages first emerge are ideal regions to characterize both the cells and environment needed to initiate blood cell development. For a number of years both the murine yolk sac and embryo have been recognized to contain progenitors of B lymphocytes. However...

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

authors： Cumano A,Furlonger C,Paige CJ

更新日期：1993-07-15 00:00:00

abstract：:An integral mitochondrial membrane protein (p32) of yeast has previously been molecularly cloned and sequenced and suggested to function as a mitochondrial import receptor. However, this protein has also been proposed to function as phosphate translocator [Guérin, B., Bukusoglu, C., Rakotomanana, F. & Wohlrab, H. (199...

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

authors： Murakami H,Blobel G,Pain D

更新日期：1993-04-15 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：:Rapamycin is a potent immunosuppressant that blocks the G1/S transition in antigen-activated T cells and in yeast. The similar effects of rapamycin in animal cells and yeast suggest that the biochemical steps affected by rapamycin are conserved. Using a two-hybrid system we isolated mammalian clones that interact with...

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

authors： Chiu MI,Katz H,Berlin V

更新日期：1994-12-20 00:00:00

abstract：:Mutations in the ATRX gene on the human X chromosome cause X-linked alpha-thalassemia and mental retardation. XY patients with deletions or mutations in this gene display varying degrees of sex reversal, implicating ATRX in the development of the human testis. To explore further the role of ATRX in mammalian sex diffe...

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

authors： Pask A,Renfree MB,Marshall Graves JA

更新日期：2000-11-21 00:00:00

abstract：:Systemic administration of 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) causes parkinsonism in humans and subhuman primates, but not in rats and many other laboratory animals; mice are intermediate in their susceptibility. Since MPTP causes selective dopaminergic neurotoxicity when infused directly into rat sub...

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

authors： Kalaria RN,Mitchell MJ,Harik SI

更新日期：1987-05-01 00:00:00

abstract：:Natural selection does not necessarily favor maximal reproduction because reproduction imposes fitness costs, reducing parental survival, and offspring quality. Here, we show that parents in a preindustrial population in North America incurred fitness costs from reproduction, and women incurred greater costs than men....

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

authors： Penn DJ,Smith KR

更新日期：2007-01-09 00:00:00

abstract：:The approximately 30-kb coronavirus (+)RNA genome is replicated and transcribed by a membrane-bound replicase complex made up of 16 viral nonstructural proteins (nsp) with multiple enzymatic activities. The complex includes an RNA endonuclease, NendoU, that is conserved among nidoviruses but no other RNA virus, making...

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

authors： Ricagno S,Egloff MP,Ulferts R,Coutard B,Nurizzo D,Campanacci V,Cambillau C,Ziebuhr J,Canard B

更新日期：2006-08-08 00:00:00

abstract：:In the face of antibiotics, bacterial populations avoid extinction by harboring a subpopulation of dormant cells that are largely drug insensitive. This phenomenon, termed "persistence," is a major obstacle for the treatment of a number of infectious diseases. The mechanism that generates both actively growing as well...

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

authors： Rotem E,Loinger A,Ronin I,Levin-Reisman I,Gabay C,Shoresh N,Biham O,Balaban NQ

更新日期：2010-07-13 00:00:00

abstract：:The structure of activated pig heart aconitase [citrate(isocitrate) hydro-lyase, EC 4.2.1.3] containing a [4Fe-4S] cluster has been refined at 2.5-A resolution to a crystallographic residual of 18.2%. Comparison of this structure to the recently determined 2.1-A resolution structure of the inactive enzyme containing a...

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

authors： Robbins AH,Stout CD

更新日期：1989-05-01 00:00:00

abstract：:We have identified a murine gene, metaxin, that spans the 6-kb interval separating the glucocerebrosidase gene (GC) from the thrombospondin 3 gene on chromosome 3E3-F1. Metaxin and GC are transcribed convergently; their major polyadenylylation sites are only 431 bp apart. On the other hand, metaxin and the thrombospon...

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

authors： Bornstein P,McKinney CE,LaMarca ME,Winfield S,Shingu T,Devarayalu S,Vos HL,Ginns EI

更新日期：1995-05-09 00:00:00

abstract：:Direct reciprocity and conditional cooperation are important mechanisms to prevent free riding in social dilemmas. However, in large groups, these mechanisms may become ineffective because they require single individuals to have a substantial influence on their peers. However, the recent discovery of zero-determinant ...

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

authors： Hilbe C,Wu B,Traulsen A,Nowak MA

更新日期：2014-11-18 00:00:00

abstract：:Src tyrosine kinase has long been implicated in colon cancer but much remains to be learned about its substrates. The nuclear receptor hepatocyte nuclear factor 4α (HNF4α) has just recently been implicated in colon cancer but its role is poorly defined. Here we show that c-Src phosphorylates human HNF4α on three tyros...

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

authors： Chellappa K,Jankova L,Schnabl JM,Pan S,Brelivet Y,Fung CL,Chan C,Dent OF,Clarke SJ,Robertson GR,Sladek FM

更新日期：2012-02-14 00:00:00

abstract：:We have generated eight mAbs (MW1-8) that bind the epitopes polyglutamine (polyQ), polyproline (polyP), or the C terminus of exon 1 in huntingtin (htt) protein. In the brains of Huntington's disease (HD) mouse models, the anti-polyQ mAbs bind to various cytoplasmic compartments, whereas the anti-polyP and anti-C termi...

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

authors： Khoshnan A,Ko J,Patterson PH

更新日期：2002-01-22 00:00:00

abstract：:HLA-DO (DO) is a nonclassic class II heterodimer that inhibits the action of the class II peptide exchange catalyst, HLA-DM (DM), and influences DM localization within late endosomes and exosomes. In addition, DM acts as a chaperone for DO and is required for its egress from the endoplasmic reticulum (ER). These recip...

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

authors： Yoon T,Macmillan H,Mortimer SE,Jiang W,Rinderknecht CH,Stern LJ,Mellins ED

更新日期：2012-07-10 00:00:00

abstract：:To improve the usefulness of in vivo mode for the investigation of the pathophysiology of human immunodeficiency virus (HIV) infection, we modified the construction of SCID mice implanted with human fetal thymus and liver (thy/liv-SCID-hu mice) so that the peripheral blood of the mice contained significant numbers of ...

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

authors： Kollmann TR,Pettoello-Mantovani M,Katopodis NF,Hachamovitch M,Rubinstein A,Kim A,Goldstein H

更新日期：1996-04-02 00:00:00

abstract：:Energy-coupling factor (ECF) transporters are a recently discovered family of primary active transporters for micronutrients and vitamins, such as biotin, thiamine, and riboflavin. Found exclusively in archaea and bacteria, including the human pathogens Listeria, Streptococcus, and Staphylococcus, ECF transporters may...

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

authors： Karpowich NK,Wang DN

更新日期：2013-02-12 00:00:00

abstract：:Atomic level characterization of proteins and other macromolecules in the living cell is challenging. Recent advances in NMR instrumentation and methods, however, have enabled in-cell studies with prospects for multidimensional spectral characterization of individual macromolecular components. We present NMR data on t...

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

authors： Augustus AM,Reardon PN,Spicer LD

更新日期：2009-03-31 00:00:00

abstract：:Transforming growth factor alpha (TGF-alpha) is generated by cleavage of a membrane-anchored precursor protein, proTGF-alpha. ProTGF-alpha is cleaved at a slow rate and accumulates on the cell surface, thereby mediating cell-cell adhesion and mitogenic stimulation. We show here that cleavage of membrane proTGF-alpha b...

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

authors： Pandiella A,Massagué J

更新日期：1991-03-01 00:00:00

abstract：:The multifunctional Creb-binding protein (CBP) protein plays a pivotal role in many critical cellular processes. Here we demonstrate that the bromodomain of CBP binds to histone H3 acetylated on lysine 56 (K56Ac) with higher affinity than to its other monoacetylated binding partners. We show that autoacetylation of CB...

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

authors： Das C,Roy S,Namjoshi S,Malarkey CS,Jones DN,Kutateladze TG,Churchill ME,Tyler JK

更新日期：2014-03-25 00:00:00