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Báo cáo khoa học: Insights into the activation of brain serine racemase by the multi-PDZ domain glutamate receptor interacting protein, divalent cations and ATP ppt

Báo cáo khoa học: Insights into the activation of brain serine racemase by the multi-PDZ domain glutamate receptor interacting protein, divalent cations and ATP ppt

Báo cáo khoa học: Insights into the activation of brain serine racemase by the multi-PDZ domain glutamate receptor interacting protein, divalent cations and ATP ppt

... calcium and ATP FEBS Journal 274 (2007) 4561–4571 ª 2007 The Authors Journal compilation ª 2007 FEBS 4571 Insights into the activation of brain serine racemase by the multi-PDZ domain glutamate receptor ... mixture.Characterization of the activation of brain SR by GRIP(468–1112)We next analysed whether larger ratios of PDZ6 domain: SR might be able to increase the synthesis of d -serine. We tested up to a ratio of 23 ... SR (left) and the PDZ6 domain of GRIP (middle). The circulardichroism spectrum of purified PDZ6 domain of GRIP is shown in the right panel. (C)D -Serine synthesis by recombinant SR in the absence...
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Báo cáo khoa học: Signaling events mediating activation of brain ethanolamine plasmalogen hydrolysis by ceramide pot

Báo cáo khoa học: Signaling events mediating activation of brain ethanolamine plasmalogen hydrolysis by ceramide pot

... characterized by the presence of a vinyl ether substituent at the sn-1position of the glycerol backbone. They are especiallyabundant in electrically active tissues, such as brain, wheremost of them ... on the type of PLA2, this cleavage leads to theirinactivation (in the case of the cytosolic PLA2,typeIV,without arachidonate-phospholipid remodeling activity) or activation (in the case of ... stimulation of the Ca2+-independentplasmalogen-selective PLA2may account for the decreasedlevels of Etn plasmalogens found in the affected regions of the brain in Alzheimer’s disease, such as the...
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Tài liệu Báo cáo khoa học: Insights into the structure of plant a-type phospholipase D Susanne Stumpe, Stephan Konig and Renate Ulbrich-Hofmann ¨ ppt

Tài liệu Báo cáo khoa học: Insights into the structure of plant a-type phospholipase D Susanne Stumpe, Stephan Konig and Renate Ulbrich-Hofmann ¨ ppt

... and poppy [20,21].In the present study, the first insights into the secon-dary and tertiary structure of PLD a2 from cabbageare given. The surface structure of the enzyme wasinvestigated by ... of the enzyme.These results unambiguously show that activation of PLDa2 by calcium ions is due to the binding of cal-cium ions to the enzyme, and not (or not only) to bet-ter structuring of ... the range of 0.5 mmwere estimated from isothermal titration calorimetry[36]. The C2 domains of other proteins showed cal-cium-binding affinities in the range of 1–50 lm [37,38].As the C2 domain...
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Tài liệu Báo cáo khoa học: Insights into the interaction of human arginase II with substrate and manganese ions by site-directed mutagenesis and kinetic studies Alteration of substrate specificity by replacement of Asn149 with Asp docx

Tài liệu Báo cáo khoa học: Insights into the interaction of human arginase II with substrate and manganese ions by site-directed mutagenesis and kinetic studies Alteration of substrate specificity by replacement of Asn149 with Asp docx

... corrected by substracting the spectrum of the buffer solution (5 mm Tris ⁄ HCl, pH 7.5) in the absence of protein. The stability to thermal inactivation was examined by incubation of the enzymes ... explained by elec-trostatic repulsion between the a-carboxyl group of the amino acid and the introduced aspartic residue atposition 149. On the other hand, as agmatine lacks the a-carboxyl group, there ... and His145Asnmutations on the affinity of metal bindingto arginase IITo further examine the effects of the His120fiAsn and His145fiAsn mutations on the interaction of the enzyme with manganese...
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Báo cáo khoa học: Insights into substrate and product traffic in the Drosophila melanogaster acetylcholinesterase active site gorge by enlarging a back channel ppt

Báo cáo khoa học: Insights into substrate and product traffic in the Drosophila melanogaster acetylcholinesterase active site gorge by enlarging a back channel ppt

... analysis of initial rate data in the absence of inhibitors, we used the specific equation in Scheme 1. The effect of two ligands on the activity of the wild-type DmAChE was evaluated by the equation ... used 1 and 10 lm propidium and 10 and 50 lm aflatoxin. The activity was followed for 1 min after the addition of acetylcholinesterase to the mixture, and the spontaneous hydrolysis of the substrate ... widens the channel from 5 A˚to 9 A˚. The kinetics of substrate hydrolysis and the effect of ligands that close the main entrancesuggest that the mutations facilitate both product exit and substrateentrance....
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Báo cáo khoa học: Insights into the design of a hybrid system between Anabaena ferredoxin-NADP+ reductase and bovine adrenodoxin pot

Báo cáo khoa học: Insights into the design of a hybrid system between Anabaena ferredoxin-NADP+ reductase and bovine adrenodoxin pot

... consumption of FNRsq by the second process, the same amount of FNRsqis produced by the first one. This isconsistent with the high Kdvalues proposed for the interaction of FNR and Adx and with the ... the changes introduced in the redox cofactor environment upon complex formation. Theyare therefore related to the specificity and the strength of the protein–protein interaction. Therefore, the ... physiologicalsignificance and support the hypothesis of the existence of aternary ET [Adx:Adx:AdR] complex in the physiologicalAdR/P450 system [16,36,37]. Therefore, our experimentaldata for the reduction of Adx by...
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Tài liệu Báo cáo khoa học: Insights into and speculations about snake venom metalloproteinase (SVMP) synthesis, folding and disulfide bond formation and their contribution to venom complexity pdf

Tài liệu Báo cáo khoa học: Insights into and speculations about snake venom metalloproteinase (SVMP) synthesis, folding and disulfide bond formation and their contribution to venom complexity pdf

... fact, the bulk of the proteolytic processing of the proforms of the SVMPs occurs in advance of release of mature secre-tory vesicle contents into the lumen of the venom gland.In the case of the ... associated with the structure of the adjacentproteinase and disintegrin-like domains and the pack-ing of those two domains together in the structure.Comparison of the sequences in the spacer domain among ... regions of the domains are probably similar tothose of the rest of the class. Whether the differentdisulfide bond patterns of these two proteinases are insome way structurally related to the presence...
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Tài liệu Báo cáo khoa học:

Tài liệu Báo cáo khoa học: "Insights into Non-projectivity in Hindi" docx

... classify these instances based onfactors leading to non-projectivity and presentour analysis of them. For each of these classes,we look at the rigidity of these non-projectiveconstructions and their ... isa chunk and the edge represents the relations be-tween the connected nodes labeled with the karakaor other relations. All the modifier-modified rela-tions between the heads of the chunks ... where the mainverb is the central binding element of the sentence. The arguments including the adjuncts are anno-tated taking the meaning of the verb into consid-eration. The participants in...
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Tài liệu Báo cáo khoa học: Structural and mechanistic aspects of flavoproteins: electron transfer through the nitric oxide synthase flavoprotein domain pdf

Tài liệu Báo cáo khoa học: Structural and mechanistic aspects of flavoproteins: electron transfer through the nitric oxide synthase flavoprotein domain pdf

... hinge domains The composition of the two hinges that connect the FMN subdomain in NOS enzymes (H1 and H2 inFig. 5) defines the allowable movements of the FMNsubdomain and thus controls the FMN–NOSoxy ... alsoinfluence the rate of electron import into the FMN sub- domain and the resulting formation of FMNH2. The extent to which KeqA or the rate of FMNH2formationinfluences electron flux through the ... oxygen activation in place of the flavoprotein, and then redox cycles within NOS; and (d) heme–NO binding is an intrinsic feature of cataly-sis that constrains the rate of heme reduction by the flavoprotein...
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Tài liệu Báo cáo khoa học: Is ATP binding responsible for initiating drug translocation by the multidrug transporter ABCG2? docx

Tài liệu Báo cáo khoa học: Is ATP binding responsible for initiating drug translocation by the multidrug transporter ABCG2? docx

... evidence for an interaction between the two domains is the ability of numerous substrates and modulators of ABCG2 (and the R482G isoform)to stimulate the rate of ATP hydrolysis [21,24,25],albeit ... observed in the presence of the ATP analogues ATP- c-S (nonhydrolysable) and TNP -ATP (slowlyhydrolysable), although the magnitude of effect with the latter was more pronounced. The ATP analogueswere ... state for the hydrolysis of the c-phosphate of ATP [30]. Figure 5 demon-strates the effect of pre-incubation of ABCG2R482G-containing membranes with 100 lm NaVO3 and aseries of ATP concentrations....
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