Pivotal role of amino acid at position 138 in the allosteric hinge reorientation of cAMP receptor protein.

abstract：:The rate constants for CO binding to the five-coordinate ferrous iron complexes of 5,10,15,20-[pyromellitoyl(tetrakis-o-oxyoxyphenyl)]porphyrin and 5,10,15,20-[pyromellitoyl(tetrakis-o-oxypropoxyphenyl)]porphyrin have been measured and compared with the corresponding rate constants for other hemes and hemoproteins. Th...

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

authors： Rose EJ,Venkatasubramanian PN,Swartz JC,Jones RD,Basolo F,Hoffman BM

更新日期：1982-09-01 00:00:00

abstract：:A mol of creatine kinase (EC 2.7.3.2), an enzyme with two identical subunits can be titrated very rapidly and stoichiometrically with 2 mol of 2-chloromercuri-4-nitrophenol, an environmentally sensitive chromophoric probe specific for thiols. Chemical modification does not inactivate the enzyme nor can the reaction be...

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

authors： Quiocho FE,Thomson JW

更新日期：1973-10-01 00:00:00

abstract：:RecQ helicases are a widely conserved family of ATP-dependent motors with diverse roles in nearly every aspect of bacterial and eukaryotic genome maintenance. However, the physical mechanisms by which RecQ helicases recognize and process specific DNA replication and repair intermediates are largely unknown. Here, we s...

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

authors： Pike AC,Gomathinayagam S,Swuec P,Berti M,Zhang Y,Schnecke C,Marino F,von Delft F,Renault L,Costa A,Gileadi O,Vindigni A

更新日期：2015-04-07 00:00:00

abstract：:Understanding the relationship between the structural and functional organization of the human brain is one of the most important goals of neuroscience. Individual variability in brain structure means that it is essential to obtain this information from the same subject. To date, this has been almost impossible. Even ...

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

authors： Walters NB,Egan GF,Kril JJ,Kean M,Waley P,Jenkinson M,Watson JD

更新日期：2003-03-04 00:00:00

abstract：:Replication through damaged sites in DNA requires in Escherichia coli the SOS stress-inducible DNA polymerase V (UmuC), which is specialized for lesion bypass. Homologs of the umuC gene were found on native conjugative plasmids, which often carry multiple antibiotic-resistant genes. MucB is a UmuC homolog present on p...

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

authors： Goldsmith M,Sarov-Blat L,Livneh Z

更新日期：2000-10-10 00:00:00

abstract：:Modifier screens have been powerful genetic tools to define signaling pathways in lower organisms. The identification of modifier loci in mice has begun to allow a similar dissection of mammalian signaling pathways. Transgenic mice (Btk(lo)) expressing 25% of endogenous levels of Bruton's tyrosine kinase (Btk) have B ...

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

authors： Satterthwaite AB,Willis F,Kanchanastit P,Fruman D,Cantley LC,Helgason CD,Humphries RK,Lowell CA,Simon M,Leitges M,Tarakhovsky A,Tedder TF,Lesche R,Wu H,Witte ON

更新日期：2000-06-06 00:00:00

abstract：:Prostate cancer development is associated with hyperactive androgen signaling. However, the molecular link between androgen receptor (AR) function and humoral factors remains elusive. A prostate cancer mouse model was generated by selectively mutating the AR threonine 877 into alanine in prostatic epithelial cells thr...

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

authors： Takahashi S,Watanabe T,Okada M,Inoue K,Ueda T,Takada I,Watabe T,Yamamoto Y,Fukuda T,Nakamura T,Akimoto C,Fujimura T,Hoshino M,Imai Y,Metzger D,Miyazono K,Minami Y,Chambon P,Kitamura T,Matsumoto T,Kato S

更新日期：2011-03-22 00:00:00

abstract：:Persisting (P) cells (murine cells that resemble mast cells and grow continuously in vitro for prolonged periods in the presence of a specific growth factor) did not express detectable levels of Ia antigens (murine class II major histocompatibility antigens) when their growth was supported by partially purified P cell...

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

authors： Wong GH,Clark-Lewis I,McKimm-Breschkin JL,Schrader JW

更新日期：1982-11-01 00:00:00

abstract：:The proteasome is responsible for degradation of substrates of the ubiquitin pathway. 20S proteasomes are cylindrical particles with subunits arranged in a stack of four heptameric rings. The outer rings are composed of alpha subunits, and the inner rings are composed of beta subunits. A well-characterized archaeal pr...

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

authors： Arendt CS,Hochstrasser M

更新日期：1997-07-08 00:00:00

abstract：:Histone methyltransferase G9a has critical roles in promoting cancer-cell growth and gene suppression, but whether it is also associated with the DNA damage response is rarely studied. Here, we report that loss of G9a impairs DNA damage repair and enhances the sensitivity of cancer cells to radiation and chemotherapeu...

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

authors： Yang Q,Zhu Q,Lu X,Du Y,Cao L,Shen C,Hou T,Li M,Li Z,Liu C,Wu D,Xu X,Wang L,Wang H,Zhao Y,Yang Y,Zhu WG

更新日期：2017-07-25 00:00:00

abstract：:The impact of projected global warming on crop yields has been evaluated by indirect methods using simulation models. Direct studies on the effects of observed climate change on crop growth and yield could provide more accurate information for assessing the impact of climate change on crop production. We analyzed weat...

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

authors： Peng S,Huang J,Sheehy JE,Laza RC,Visperas RM,Zhong X,Centeno GS,Khush GS,Cassman KG

更新日期：2004-07-06 00:00:00

abstract：:The bacterial hibernating 100S ribosome is a poorly understood form of the dimeric 70S particle that has been linked to pathogenesis, translational repression, starvation responses, and ribosome turnover. In the opportunistic pathogen Staphylococcus aureus and most other bacteria, hibernation-promoting factor (HPF) ho...

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

authors： Basu A,Yap MN

更新日期：2017-09-26 00:00:00

abstract：:Biological soil crusts (biocrusts)—communities of mosses, lichens, cyanobacteria, and heterotrophs living at the soil surface—are fundamental components of drylands worldwide, and destruction of biocrusts dramatically alters biogeochemical processes, hydrology, surface energy balance, and vegetation cover. Although th...

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

authors： Ferrenberg S,Reed SC,Belnap J

更新日期：2015-09-29 00:00:00

abstract：:An unusual cAMP signaling system mediates many of the events that prepare spermatozoa to meet the egg. Its components include the atypical, bicarbonate-stimulated, sperm adenylyl cyclase and a cAMP-dependent protein kinase (PKA) with the unique catalytic subunit termed Calpha(2) or C(s). We generated mice that lack Ca...

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

authors： Nolan MA,Babcock DF,Wennemuth G,Brown W,Burton KA,McKnight GS

更新日期：2004-09-14 00:00:00

abstract：:Mutations in fibroblast growth factor receptor 2 (FGFR2) and its ligand, FGF10, are known to cause lacrimo-auriculo-dento-digital (LADD) syndrome. Multiple gain-of-function mutations in FGF receptors have been implicated in a variety of severe skeletal disorders and in many cancers. We aimed to elucidate the mechanism...

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

authors： Lew ED,Bae JH,Rohmann E,Wollnik B,Schlessinger J

更新日期：2007-12-11 00:00:00

abstract：:After treatment with nitrite, Japanese soy sauce was strongly mutagenic to Salmonella typhimurium TA100 without S9 mixture. Two precursors of the mutagen were isolated from Japanese soy sauce, and these were identified as (-)-(1S,3S)-1-methyl-1,2,3,4-tetrahydro-beta-carboline-3-carboxylic acid [(-)-(1S,3S)-MTCA] and i...

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

authors： Wakabayashi K,Ochiai M,Saitô H,Tsuda M,Suwa Y,Nagao M,Sugimura T

更新日期：1983-05-01 00:00:00

abstract：:The binding of chylomicron remnants rat liver plasma membranes was studied. Liver membranes bound up to 8 times more remnants than they bound chylomicrons. The remnant particle appeared to bind to the membrane as a unit. Remnant binding was greatest to liver plasma membrane; only one third as much binding was observed...

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

authors： Carrella M,Cooper AD

更新日期：1979-01-01 00:00:00

abstract：:The formation of nerve-muscle junctions in monolayer cultures of embryonic muscle and spinal cord cells is described. Muscle-forming cells (myoblasts) from leg muscles of 12-day chick embryos were separated with trypsin and cultured on a collagen substrate for two days. Suspensions of ventral spinal cord cells from si...

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

authors： Shimada Y,Fischman DA,Moscona AA

更新日期：1969-03-01 00:00:00

abstract：:A DNA fragment homologous to U6 small nuclear RNA was isolated from a human genomic library and sequenced. The immediate 5'-flanking region of the U6 DNA clone had significant homology with a potential mouse U6 gene, including a "TATA box" at a position 26-29 nucleotides upstream from the transcription start site. Alt...

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

authors： Kunkel GR,Maser RL,Calvet JP,Pederson T

更新日期：1986-11-01 00:00:00

abstract：:Cyclotides are plant defense peptides that have been extensively investigated for pharmaceutical and agricultural applications, but key details of their posttranslational biosynthesis have remained elusive. Asparaginyl endopeptidases are crucial in the final stage of the head-to-tail cyclization reaction, but the enzy...

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

authors： Rehm FBH,Jackson MA,De Geyter E,Yap K,Gilding EK,Durek T,Craik DJ

更新日期：2019-04-16 00:00:00

abstract：:The intracellular localization of phytochrome was seen in dark-grown oat (Avena sativa L., cv. Garry) and rice (Oryza sativa L., cv. unknown) shoots after various light treatments using an indirect peroxidase-antiperoxidase antibody labeling method. Phytochrome is generally distributed throughout the cytoplasm in cell...

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

authors： Mackenzie JM Jr,Coleman RA,Briggs WR,Pratt LH

更新日期：1975-03-01 00:00:00

abstract：:The ability of the cornea to transmit light while being mechanically resilient is directly attributable to the formation of an extracellular matrix containing orthogonal sheets of collagen fibrils. The detailed structure of the fibrils and how this structure underpins the mechanical properties and organization of the ...

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

authors： Holmes DF,Gilpin CJ,Baldock C,Ziese U,Koster AJ,Kadler KE

更新日期：2001-06-19 00:00:00

abstract：:Down syndrome (DS) is the most common form of intellectual disability. The cognitive alterations in DS are thought to depend on brain regions critical for learning and memory such as the prefrontal cortex (PFC) and the hippocampus (HPC). Neuroimaging studies suggest that increased brain connectivity correlates with lo...

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

authors： Alemany-González M,Gener T,Nebot P,Vilademunt M,Dierssen M,Puig MV

更新日期：2020-05-26 00:00:00

abstract：:Thyrotoxicosis increases endogenous glucose production (EGP) and induces hepatic insulin resistance. We have recently shown that these alterations can be modulated by selective hepatic sympathetic and parasympathetic denervation, pointing to neurally mediated effects of thyroid hormone on glucose metabolism. Here, we ...

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

authors： Klieverik LP,Janssen SF,van Riel A,Foppen E,Bisschop PH,Serlie MJ,Boelen A,Ackermans MT,Sauerwein HP,Fliers E,Kalsbeek A

更新日期：2009-04-07 00:00:00

abstract：:In feeding, aphids inject saliva into plant tissues, gaining access to phloem sap and eliciting (and sometimes overcoming) plant responses. We are examining the involvement, in this aphid-plant interaction, of individual aphid proteins and enzymes, as identified in a salivary gland cDNA library. Here, we focus on a sa...

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

authors： Mutti NS,Louis J,Pappan LK,Pappan K,Begum K,Chen MS,Park Y,Dittmer N,Marshall J,Reese JC,Reeck GR

更新日期：2008-07-22 00:00:00

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：:This study details the immune response to cartilage proteoglycan in experimental chronic IgG-induced immune synovitis. Antibodies reactive with purified rabbit proteoglycan monomer were observed in nine of nine rabbits with immune synovitis. IgG-immunized but nonsynovitic control animals with no pathology showed no an...

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

authors： Yoo JU,Kresina TF,Malemud CJ,Goldberg VM

更新日期：1987-02-01 00:00:00

abstract：:Oxygen-derived free radicals have been implicated in the pathogenesis of vasogenic edema and infarction caused by ischemia and reperfusion injury. In earlier studies, exogenously supplied liposome-entrapped CuZn superoxide dismutase (CuZn-SOD) ameliorated ischemic brain edema and infarction in rats following focal cer...

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

authors： Kinouchi H,Epstein CJ,Mizui T,Carlson E,Chen SF,Chan PH

更新日期：1991-12-15 00:00:00

abstract：:We have assayed carbonic anhydrase activity (carbonate dehydratase, carbonate hydro-lyase, EC 4.2.1.1) and bicarbonate permeability in suspensions of broken and intact guinea pig mitochondria by monitoring the disappearance of C16O18O. We found significant activity in preparations from liver and skeletal muscle, but n...

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

authors： Dodgson SJ,Forster RE 2nd,Storey BT,Mela L

更新日期：1980-09-01 00:00:00

abstract：:Several dual route models of human speech processing have been proposed suggesting a large-scale anatomical division between cortical regions that support motor-phonological aspects vs. lexical-semantic aspects of speech processing. However, to date, there is no complete agreement on what areas subserve each route or ...

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

authors： Fridriksson J,Yourganov G,Bonilha L,Basilakos A,Den Ouden DB,Rorden C

更新日期：2016-12-27 00:00:00