263 research outputs found

    D. Junii Juvenalis sexdecim Satirae. Volumen 2 / , ad codices parisinos recensitae, cum interpretatione latina, lectionum varietate, notis rupertianis, excursibus et indice absoluto, quibus plurima subjunxit additamenta N.-E. Lemaire

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    [Satires (latin). 1823]Collection : Bibliotheca classica latinaCollection : Bibliotheca classica latinaComprend : A. Persii Flacci sex satirae ; Caii Lucilii Suessani Auruncani unius e quatuor latinis satiricis satirarum quae supersunt fragmenta ; Sulpiciae satiricon carmen ; D. Junii Juvenalis vita ; Auli Persii Flacci vit

    D. Junii Juvenalis sexdecim Satirae. Volumen 1 / , ad codices parisinos recensitae, cum interpretatione latina, lectionum varietate, notis rupertianis, excursibus et indice absoluto, quibus plurima subjunxit additamenta N.-E. Lemaire

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    [Satires (latin). 1823]Collection : Bibliotheca classica latinaCollection : Bibliotheca classica latinaComprend : A. Persii Flacci sex satirae ; Caii Lucilii Suessani Auruncani unius e quatuor latinis satiricis satirarum quae supersunt fragmenta ; Sulpiciae satiricon carmen ; D. Junii Juvenalis vita ; Auli Persii Flacci vitaContient une table des matière

    Tax ubiquitylation and sumoylation control critical cytoplasmic and nuclear steps of NF-κB activation

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    The Tax oncoprotein plays a crucial role in the proliferation and transformation of human T-cell leukemia virus type I (HTLV-I)-infected T lymphocytes through various mechanisms, including activation of the nuclear factor (NF)-κB pathway. We found that cytoplasmic ubiquitylation of Tax C-terminal lysines is critical for Tax binding to the IkappaB kinase complex and subsequent nuclear translocation of RelA. Conversely, we demonstrate that the same lysines are sumoylated in the nucleus, an event required for the formation of RelA-p300-enriched Tax nuclear bodies and full NF-κB transcriptional activation. In contrast, Tax ubiquitylation and sumoylation are dispensable for its activation of cyclic adenosine monophosphate response element binding protein (CREB)-dependent genes. Thus, ubiquitylation and sumoylation of the same residues of Tax regulate 2 essential steps controlling NF-κB activation, demonstrating how these post-translational modifications can cooperate to promote Tax-induced transformation. © 2006 by The American Society of Hematology.Bex F, 1998, MOL CELL BIOL, V18, P2392; Bres V, 2003, NAT CELL BIOL, V5, P754, DOI 10.1038-ncb1023; Carter RS, 2003, J BIOL CHEM, V278, P48903, DOI 10.1074-jbc.M310686200; Chiari E, 2004, J VIROL, V78, P11823, DOI 10.1128-JVI.78.21.11823-11832.2004; Conaway RC, 2002, SCIENCE, V296, P1254, DOI 10.1126-science.1067466; Desterro JMP, 1998, MOL CELL, V2, P233, DOI 10.1016-S1097-2765(00)80133-1; Ghosh S, 2002, CELL, V109, pS81, DOI 10.1016-S0092-8674(02)00703-1; Grassmann R, 2005, ONCOGENE, V24, P5976, DOI 10.1038-sj.onc.1208978; Harhaj EW, 1999, J BIOL CHEM, V274, P22911, DOI 10.1074-jbc.274.33.22911; Harrod R, 1998, MOL CELL BIOL, V18, P5052; Hilgarth RS, 2004, J BIOL CHEM, V279, P53899, DOI 10.1074-jbc.R400021200; Hoege C, 2002, NATURE, V419, P135, DOI 10.1038-nature00991; Huang TT, 2003, CELL, V115, P565, DOI 10.1016-S0092-8674(03)00895-X; Li XH, 2000, AIDS RES HUM RETROV, V16, P1583, DOI 10.1089-08892220050192994; Meertens L, 2004, ONCOGENE, V23, P5447, DOI 10.1038-sj.onc.1207719; Nasr R, 2003, BLOOD, V101, P4576, DOI 10.1182-blood-2002-09-2986; NASR R, 2005, ONCOGENE, V13, P419; Peloponese JM, 2004, J VIROL, V78, P11686, DOI 10.1128-JVI.78.21.11686-11695.2004; PICKART CM, 1994, J BIOL CHEM, V269, P7115; Robek MD, 1999, J VIROL, V73, P4856; SMITH MR, 1991, J CLIN INVEST, V88, P1038, DOI 10.1172-JCI115364; Sun SC, 2005, ONCOGENE, V24, P5952, DOI 10.1038-sj.onc.1208969; Takahashi Y, 2004, ONCOGENE, V23, P2819, DOI 10.1038-sj.onc.1207533; Yamaoka S, 1998, CELL, V93, P1231, DOI 10.1016-S0092-8674(00)81466-X58595

    Modification of Loop 1 Affects the Nucleotide Binding Properties of Myo1c, the Adaptation Motor in the Inner Ear

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    Myo1c is one of eight members of the mammalian myosin I family of actin-associated molecular motors. In stereocilia of the hair cells in the inner ear, Myo1c presumably serves as the adaptation motor, which regulates the opening and closing of transduction channels. Although there is conservation of sequence and structure among all myosins in the N-terminal motor domain, which contains the nucleotide- and actin-binding sites, some differences include the length and composition of surface loops, including loop 1, which lies near the nucleotide-binding domain. To investigate the role of loop 1, we expressed in insect cells mutants of a truncated form of Myo1c, Myo1c1IQ, as well as chimeras of Myo1c1IQ with the analogous loop from other myosins. We found that replacement of the charged residues in loop 1 with alanines or the whole loop with a series of alanines did not alter the ATPase activity, transient kinetics properties, or Ca2+ sensitivity of Myo1c1IQ. Substitution of loop 1 with that of the corresponding region from tonic smooth muscle myosin II (Myo1c1IQ-tonic) or replacement with a single glycine (Myo1c1IQ-G) accelerated the release of ADP from A.M 2?3-fold in Ca2+, whereas substitution with loop 1 from phasic muscle myosin II (Myo1c1IQ-phasic) accelerated the release of ADP 35-fold. Motility assays with chimeras containing a single ?-helix, or SAH, domain showed that Myo1cSAH-tonic translocated actin in vitro twice as fast as Myo1cSAH-WT and 3-fold faster than Myo1cSAH-G. The studies show that changes induced in Myo1c via modification of loop 1 showed no resemblance to the behavior of the loop donor myosins or to the changes previously observed with similar Myo1b chimeras

    High-precision photometry by telescope defocussing - VI. WASP-24, WASP-25 and WASP-26

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    The research leading to these results has received funding from the European Community's Seventh Framework Programme (FP7/2007-2013/) under grant agreement nos. 229517 and 268421. This publication was supported by grants NPRP 09-476-1-078 and NPRP X-019-1-006 from Qatar National Research Fund (a member of Qatar Foundation). TCH acknowledges financial support from the Korea Research Council for Fundamental Science and Technology (KRCF) through the Young Research Scientist Fellowship Programme and is supported by the KASI (Korea Astronomy and Space Science Institute) grant 2012-1-410-02/2013-9-400-00. SG, XW and XF acknowledge the support from NSFC under the grant no. 10873031. The research is supported by the ASTERISK project (ASTERoseismic Investigations with SONG and Kepler) funded by the European Research Council (grant agreement no. 267864). DR, YD, AE, FF (ARC), OW (FNRS research fellow) and J Surdej acknowledge support from the Communauté française de Belgique – Actions de recherche concertées – Académie Wallonie-Europe.We present time series photometric observations of 13 transits in the planetary systems WASP-24, WASP-25 and WASP-26. All three systems have orbital obliquity measurements, WASP-24 and WASP-26 have been observed with Spitzer, and WASP-25 was previously comparatively neglected. Our light curves were obtained using the telescope-defocussing method and have scatters of 0.5–1.2 mmag relative to their best-fitting geometric models. We use these data to measure the physical properties and orbital ephemerides of the systems to high precision, finding that our improved measurements are in good agreement with previous studies. High-resolution Lucky Imaging observations of all three targets show no evidence for faint stars close enough to contaminate our photometry. We confirm the eclipsing nature of the star closest to WASP-24 and present the detection of a detached eclipsing binary within 4.25 arcmin of WASP-26.Peer reviewe

    Eradication of acute promyelocytic leukemia-initiating cells by PML-RARA-targeting

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    Acute promyelocytic leukemia (APL) is characterized by a t(15;17) translocation that yields a PML-RARA fusion protein. Expression of PML-RARA, a potent transcriptional repressor, induces APL in mice. Both retinoic acid (RA) and arsenic trioxide directly target PML-RARA-mediated transcriptional repression and protein stability, inducing rapid differentiation of the promyelocytes and clinical remission in most APL patients. RA also triggers growth arrest and progressive clearance of leukemia initiating cells (LIC), both ex vivo and in vivo. Suboptimal RA concentrations or expression of the PLZF-RARA variant allows complete RA-induced differentiation, but neither LIC clearance nor disease remission. Thus, RA-induced differentiation and LIC clearance may be uncoupled. The RA-arsenic trioxide association, which dramatically synergizes for PML-RARA degradation but not for differentiation, rapidly clears LIC in a proteasome-dependent manner, resulting in APL eradication in murine models and patients. Collectively, these results demonstrate that LIC clearance, which mirrors PML-RARA degradation, is the primary basis for APL cure by the RA-arsenic trioxide association, rather than differentiation. 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    Proapoptotic regimes for HTLV-I-transformed cells: targeting Tax and the NF-κB pathway

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    Effect of partial sodium replacement on physicochemical parameters of smoked sea bass during storage

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    The objective of this work was to study the effect of partial sodium replacement by potassium and packaging conditions on the physicochemical properties of smoked sea bass during cold storage. Sea bass fillets were salted with 100% NaCl (Na samples) or with 50% NaCl-50% KCl (Na:K samples), smoked, packaged under three different conditions (air, vacuum and modified atmosphere) and stored at 4 °C for 42 days. Physicochemical parameters, color and texture were periodically determined in the raw material and in smoked samples during cold storage. The smoking process led to a reduction in moisture, pH and aw values, and an increase in water holding capacity, ash and mineral contents. Smoked fish exhibited significant differences in color and texture as compared to fresh fish. The type of packaging had an effect on the pH, water holding capacity and texture. Samples in air exhibited the highest pH values and water holding capacity in these samples gradually decreased during storage. 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