activation of rnase h
Báo cáo khoa học: "Circadian pattern of activation of the medical emergency team in a teaching hospita"
Ngày tải lên :
25/10/2012, 10:45
... handover, the 1-hour period spanning handover (the half-hour before and the half-hour after, repeated three times per day for a total of hours) was compared with the average activation over the 24-hour ... on the activation of all MET calls is maintained on a hospital switchboard logbook that includes the date and time of the call, as well as the ward where the MET review occurred The details of ... of routine nursing observation and handover Thus, we hypothesized that activation of the MET service at our institution would cluster around these times To test this hypothesis we analyzed the...
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Tài liệu Báo cáo khoa học: Functional and structural analyses of N-acylsulfonamidelinked dinucleoside inhibitors of RNase A ppt
Ngày tải lên :
14/02/2014, 22:20
... secretory RNases from the zebrash share the RNase A scaffold [7] Small-molecule inhibitors of these RNases could be used to investigate their broad biological functions The afnity of RNase A for ... 5Â-diphosphoadenosine 3Â-phosphate and 5Â-diphosphoadenosine 2Â-phosphate exhibit strong afnity for RNase A [18], owing to extensive hydrogen-bonding interactions [19] Pyrophosphoryl groups, however, ... contrast, the exocyclic N6-amino group of adenine forms a hydrogen bond with the side chain of Asn71, increasing the afnity of RNase A for UpA This hydrogen bond is apparent in the complexes with N-acylsulfonamides...
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Tài liệu Báo cáo khoa học: Myristoylation of the dual-specificity phosphatase c-JUN N-terminal kinase (JNK) stimulatory phosphatase 1 is necessary for its activation of JNK signaling and apoptosis pdf
Ngày tải lên :
16/02/2014, 14:20
... as the classical PTPs, the catalytic cleft of DSPs is shallower, which allows accommodation of both phosphorylated Ser ⁄ Thr and Tyr residues [18] Several DSPs have been established as MAPK phosphatases ... attached to the dish, did not show cleavage of caspase-9 or PARP Interestingly, the floating cells expressed considerably higher levels of JSP1-wt than those cells that remained attached to the ... expression However, these efforts were frustrated by the lack of specificity of SP600125, which has also been reported by others [42,43] Resolution of the importance of JNK activation will require further...
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Tài liệu Báo cáo khoa học: Golgi reassembly stacking protein 55 interacts with membrane-type (MT) 1-matrix metalloprotease (MMP) and furin and plays a role in the activation of the MT1-MMP zymogen pdf
Ngày tải lên :
18/02/2014, 04:20
... 4), although not to the level observed with the LLY570-573AAA triple mutant (Fig S2, lane 3), demonstrating that the mutation of the whole LLY573 motif is needed to abolish the interaction of MT1MMP ... cell lines which maintain their differentiated phenotype Endothelium 2, 191–201 Plaimauer B, Mohr G, Wernhart W, Himmelspach M, Dorner F & Schlokat U (2001) ‘Shed’ furin: mapping of the cleavage ... MT1-MMP ICD with the PDZ2 domain of GRASP55 The interaction of PDZ domains with ICD internal motifs has previously been reported For example, the interaction of the ErbB2 ICD with the Erbin PDZ...
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Tài liệu Báo cáo khoa học: Structure of RNase Sa2 complexes with mononucleotides – new aspects of catalytic reaction and substrate recognition pptx
Ngày tải lên :
18/02/2014, 11:20
... to His40 Protonated His40 interacts with Glu58 through a hydrogen bond, enhancing the ability of Glu58 to activate the nucleophilic attack of the ribose O2¢ on the phosphorus atom of the phosphate ... Asp66–Thr69 and Arg34 NH1 and ˚ NH2, which are 3.2 A from the phosphate group of the second nucleotide This suggests that the Arg34 side chain may be important in binding the phosphate group of the ... phosphate group of the mononucleotide, and Arg71 is within Structures of RNase Sa2–mononucleotide complexes hydrogen-bonding distance of sulfur, which replaces the other oxygen of the phosphate...
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Tài liệu Báo cáo khoa học: Interleukin-1-inducible MCPIP protein has structural and functional properties of RNase and participates in degradation of IL-1b mRNA doc
Ngày tải lên :
18/02/2014, 14:20
... shown in Fig 7A, there is expression of the gene encoding IL-1b, although the transcript level is low in comparison to that of the GAPDH transcript To investigate interactions of MCPIP with the ... to that present in the 3¢ UTR of IL-6 mRNA [4,17] The presence of such a sequence may account for the degra- MCPIP protein as an RNase dation of both types of IL-1b transcripts, with and without ... independently of the presence of AREs (Fig 6B, lanes and 5) It is possible that in the region located before the AREs, consisting of 343 bp of the 3¢ UTR of the IL-1b transcript, there is a putative...
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Tài liệu Báo cáo khoa học: Lipopolysaccharide-evoked activation of p38 and JNK leads to an increase in ICAM-1 expression in Schwann cells of sciatic nerves ppt
Ngày tải lên :
18/02/2014, 18:20
... migration of primed T cells into the peripheral nerve, ICAM-1 ⁄ LFA-1 adhesion molecules act on both the induction and effect phases of the immune response [38] These observations, together with our ... control the sciatic nerve at several time points after LPS injection and found that their levels had increased by h and were especially high at h This increase lasted for 12 h We conclude that ICAM-1 ... the transcription factor specificity protein-1 [44] Consistent with the results reported by Kobuchi et al., which showed that phorbol ester and TNF-a induced ICAM-1 expression via activation of...
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Tài liệu Báo cáo khoa học: Rac upregulates tissue inhibitor of metalloproteinase-1 expression by redox-dependent activation of extracellular signal-regulated kinase signaling pptx
Ngày tải lên :
19/02/2014, 05:20
... inhibited by selective inactivation of the AP-1 site and completely inhibited by simultaneous inactivation of the AP-1 and PEA-3 ⁄ ETS-1 sites Selective inactivation of the PEA-3 ⁄ ETS-1 site had ... line with recent studies showing that a specific inhibitor of the ERK pathway reduced both retinoic acid-induced and basal TIMP-1 production, whereas specific p38 MAPK inhibitors rather enhanced ... have reported that the AP-1 and PEA3 ⁄ ETS-1 sites and the proteins binding to them interact to enhance transcription from the whole element Therefore, we analyzed the role of these two sites...
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Tài liệu Báo cáo khoa học: Activation of the Torpedo nicotinic acetylcholine receptor The contribution of residues aArg55 and cGlu93 ppt
Ngày tải lên :
19/02/2014, 07:20
... forming these binding pockets [7–9] Although none of the ligand-gated ion channel family to which the nAChR belongs has been crystallized, the published structure of a related protein [10], the acetylcholine ... differ from that of the WT nAChR Thus, despite the reduction in the potency of ACh in mediating functional responses in the mutant receptors, the equilibrium (high affinity) binding of ACh appears ... that the stretches of amino acids that have been implicated in binding are arranged in looplike structures The structural homology of all subunits in the LGIC family suggests that each of the...
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Tài liệu Báo cáo khoa học: Synergistic activation of signalling to extracellular signal-regulated kinases 1 and 2 by epidermal growth factor and 4b-phorbol 12-myristate 13-acetate pptx
Ngày tải lên :
19/02/2014, 16:20
... positive feedback loop of the MAPK pathway [4,8] Therein, ERK-PP phosphorylates cytosolic phospholipase A2 (cPLA2) [27], causing the release of arachidonic acid, which, together with calcium and diacylglycerol ... Perrier, H. , Tremblay, N.M., Huang, Z., Weech, P.K & Gelb, M .H (1993) Slow- and tight-binding inhibitors of the 85-kDa human phospholipase A2 Biochemistry 32, 5935–5940 36 Chang, T.M., Chang, C .H. , ... quasi-steady statephase Shown are the mean results of three independent experiments, the error bars represent the standard error of the mean NRK cells with EGF, also in the presence of the PKC inhibitor...
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Tài liệu Báo cáo Y học: Phosphorylation of initiation factor-2a is required for activation of internal translation initiation during cell differentiation ppt
Ngày tải lên :
22/02/2014, 07:20
... contribute to the observed enhancement of 5¢-cap independent translation However, such mechanisms were beyond the focus of this study Phosphorylation of eIF2a which leads to decreased binding of initiator ... the mechanism of IRES activation, we wished to assess whether the mechanisms involved in regulation of global translation during differentiation have a role in the translational activation of ... seems likely that the regulatory function of eIF2 depends on the delicate balance of phosphorylated eIF2a with other cellular components, and on the physiological status of the cell The data presented...
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Tài liệu Báo cáo Y học: The solution structure and activation of visual arrestin studied by small-angle X-ray scattering pot
Ngày tải lên :
22/02/2014, 07:20
... when phosphopeptide was bound to wild-type arrestin The effect of the R175Q mutation on the properties of arrestin is consistent with the observed effect of the phosphopeptide: both cause activation ... Wilden, U., Hall, S.W & Kuhn, H (1986) Phosphodiesterase ¨ activation by photoexcited rhodopsin is quenched when rhodopsin is phosphorylated and binds the intrinsic 48-kDa protein of rod outer ... bovine rhodopsin, which comprises the carboxyl terminal phosphorylation site (DDEASTTVSKTETSQVAPA) Peptide synthesis, for both the unphosphorylated and fully phosphorylated versions, has been...
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Báo cáo khoa học: ATP allosteric activation of atrial natriuretic factor receptor guanylate cyclase pot
Ngày tải lên :
06/03/2014, 11:20
... signaling of ANF-RGC with a Vmax 2556 value almost identical to that of staurosporine, whereas, with ATP, the Vmax value was approximately 40% higher (Fig 5) These results show that the phosphorylation ... (TAPELL) to the surface The larger the side chain of the 669 amino acid residue, the more efficient it is with respect to pushing the other residues up The present study shows that the same logic ... [c32P]-8-azido-ATP cross-linked with the ARM domain in a dose-dependent fashion Kinetics of the displacement show that the affinity of staurosporine to the ARM domain is higher than that of ATP Molecular modeling,...
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Báo cáo khoa học: The N-terminal hybrid binding domain of RNase HI from Thermotoga maritima is important for substrate binding and Mg2+-dependent activity pot
Ngày tải lên :
06/03/2014, 22:21
... with those of Bha -RNase HI (Bha), SIB1 HBD -RNase HI (SIB1HBD), Sce -RNase H1 (Sce), Hsa -RNase H1 (Hsa), Eco -RNase HI (Eco) and HIV-1 RNase H (HIV1) The accession numbers are AAD36370 for Tma -RNase ... those of the representative members of type RNases H, Bha -RNase HI, HBD -RNase HI from Shewanella sp SIB1, Saccharomyces cerevisiae RNase H1 (Sce -RNase H1 ), human RNase H1 (Hsa -RNase H1 ), E coli RNase ... to the initiator methionine for each protein 43%, 42%, 33% and 32% with respect to those of Sce -RNase H1 , Bha -RNase HI, SIB1 HBD -RNase HI and Hsa -RNase H1 , whereas the RNase H domain of Tma-RNase...
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Báo cáo khoa học: Involvement of lysine 1047 in type I collagen-mediated activation of polymorphonuclear neutrophils doc
Ngày tải lên :
07/03/2014, 06:20
... influence of the e-NH2 group charge and the steric hindrance of the side chain The residue deprived of a side chain did not disturb the particular structure of the collagen a chain We found that this ... of the a-amino group of the tissue inhibitor of metalloproteinases-2 NH2-terminal cysteine has been used to demonstrate the key role of this amino group in the inhibitory effect of tissue inhibitor ... in this process To that end, three evaluations were carried out: (a) the competitive effect of AHA on collagen-induced PMN activation, (b) the effect of the carbamylation of lysine side chains...
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Báo cáo khoa học: Activation of nematode G protein GOA-1 by the human muscarinic acetylcholine receptor M2 subtype Functional coupling of G-protein-coupled receptor and G protein originated from evolutionarily distant animals doc
Ngày tải lên :
07/03/2014, 11:20
... indicating that the side effect of the activation of GAR-3 is limited Furthermore, the phenotype of gar-3 loss -of- function mutants is almost wildtype with the exception of a faster pharyngeal pumping ... suggesting that the use of M2 is restricted by the influence of intrinsic acetylcholine In C elegans, three muscarinic acetylcholine receptors have been found (GAR-1, -2 and -3) Although the pharmacological ... -independent activation of GOA-1 have been experimentally evidenced C elegans is the best genetic model The generation of transgenic C elegans has been established and is easier than that of other animal...
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Báo cáo khoa học: Stimulation of fibroblast proliferation by neokyotorphin requires Ca2+ influx and activation of PKA, CaMK II and MAPK/ERK pdf
Ngày tải lên :
07/03/2014, 11:20
... The activity of lm neokyotorphin was inhibited over the whole concentration range of H- 89, confirming the involvement of PKA in the effect of neokyotorphin As for participation of the other H- 89-suppressed ... in the action of neokyotorphin, which, if this is the case, should not be associated with the expression of specific receptors for that peptide The effectiveness of neokyotorphin should rather ... the effect of neokyotorphin In general, the action of neokyotorphin in L929 cells appears be similar to that of cAMP Results Effect of neokyotorphin in the absence of growth factors To test the...
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Báo cáo khoa học: Adenine nucleotides inhibit proliferation of the human lung adenocarcinoma cell line LXF-289 by activation of nuclear factor jB1 and mitogen-activated protein kinase pathways doc
Ngày tải lên :
07/03/2014, 12:20
... of agonist (Fig 5B) These results further indicate the involvement of both MAPKs, ERK1 ⁄ and p38, in the signaling pathways, consistent with the inhibition of the antiproliferative activity of ... the human P2Y11 receptor with similar potency as ATP [20] The pharmacologic profile seen here for the inhibition of proliferation best fits the characteristics of the subtypes P2Y2 and P2Y13, which ... Intriguingly, another mechanism by which p38 MAPK may negatively regulate the cell cycle is by activation of the mitotic spindle assembly checkpoint pathway that monitors the correct formation of the spindle...
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Báo cáo khoa học: Activation of activating transcription factor 2 by p38 MAP kinase during apoptosis induced by human amylin in cultured pancreatic b-cells ppt
Ngày tải lên :
07/03/2014, 12:20
... time-dependent activation of p38 kinase, which was detectable from h, peaked at h, then declined by h and had returned to the 1 -h level by 16 h after treatment In contrast, hA rA 0h 1h 2h 4h 8h 1 6h 2 4h 1h ... b-cells, through activation of the JNK pathway [15,23] In the current study, we planned to determine whether either of the other two MAP kinases, ERK and p38 kinase, and activation of their target ... 4A) Phosphorylated ATF-2 had reached maximal levels by h after initiation of hA treatment (four- to five-fold increase), which coincided with the time at which the level of p-p38 kinase had increased...
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Báo cáo khoa học: Covalent activation of heart AMP-activated protein kinase in response to physiological concentrations of long-chain fatty acids docx
Ngày tải lên :
07/03/2014, 15:20
... which were only approximately half of those precipitated by the sheep antiserum in all other experiments Although these fed/ starved measurements were closely time-matched with each other they ... signalling process through which increased NEFA causes covalent activation of AMPK is unclear but fatty acids must now join the list of agents which this without any of the relatively large changes in ... NEFA characteristic of the fed to fasted transition led to phosphorylation and activation of AMPK in perfused hearts without changes in contents of AMP, ATP, phosphocreatine and creatine Therefore...
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