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Báo cáo khoa học: Kinetic and crystallographic analyses of the catalytic domain of chitinase from Pyrococcus furiosus – the role of conserved residues in the active site pdf

Báo cáo khoa học: Kinetic and crystallographic analyses of the catalytic domain of chitinase from Pyrococcus furiosus – the role of conserved residues in the active site pdf

Báo cáo khoa học: Kinetic and crystallographic analyses of the catalytic domain of chitinase from Pyrococcus furiosus the role of conserved residues in the active site pdf

... 2010 The Authors Journal compilation ª 2010 FEBS 2695 Kinetic and crystallographic analyses of the catalytic domain of chitinase from Pyrococcus furiosus the role of conserved residues in the active ... 2010)doi:10.1111/j.1742-4658.2010.07685.x The hyperthermostable chitinase from the hyperthermophilic archaeon Pyrococcus furiosus has a unique multidomain structure containing two chi-tin-binding domains and two catalytic domains, and ... applications.Pf-ChiA has a unique multidomain structure con-taining two chitin-binding domains (ChBD1 and ChBD2) and two catalytic (active) domains (AD1 and AD2) [25]. Both catalytic domains belong to GH fam-ily...
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Tài liệu Báo cáo khoa học: Functional and structural analyses of N-acylsulfonamidelinked dinucleoside inhibitors of RNase A ppt

Tài liệu Báo cáo khoa học: Functional and structural analyses of N-acylsulfonamidelinked dinucleoside inhibitors of RNase A ppt

... sulfonamide [R–S(O2)–NH–R¢] [23], sulfamate [R–O–S(O2)–NH–R¢] [24], sulfamide[R–NH–S(O2)–NH–R¢] [25,26], and N -acylsulfamate[R–O–S(O2)–NH–C(O)–R¢] [27]. Of these functionalgroups, only the ... [46]. The similarity in the Kmvalues is attributable to the uracil moiety binding in the same fashion [38], which could trigger the initialbinding of both substrates. In UpG, the binding of the guanine ... mononucleo-sides and two dinucleosides containing an N-acylsulf-onamide linker [R–S(O2)–NH–C(O)–R¢], which hasthree nonbridging oxygens, in the place of a phos-phoryl group. Finally, we determined the...
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Báo cáo khoa học: Kinetic and mechanistic characterization of Mycobacterium tuberculosis glutamyl–tRNA synthetase and determination of its oligomeric structure in solution pptx

Báo cáo khoa học: Kinetic and mechanistic characterization of Mycobacterium tuberculosis glutamyl–tRNA synthetase and determination of its oligomeric structure in solution pptx

... sequence and the mass of the fragments, and from the kinetics of the process (Figs S7–S9 and Table S5)we concluded that the main sites of proteolytic cleav-age are at the C-terminus of the predicted ... minor, implying rotations of domains of just a few degrees (e.g. 7° interdomain rotations upontRNA binding to the Tt-GluRS and local limitedrearrangements in the active site) [5]. Interestingly, ... (ArgRS) and class I lysyl–tRNAsynthetase (LysRS) are exceptions in that activation of the amino acid requires the presence of the cognatetRNA [2,4]. In these aaRS the binding of tRNAinduces...
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Báo cáo khoa học: Kinetic and binding studies with purified recombinant proteins ferredoxin reductase, ferredoxin and cytochrome P450 comprising the morpholine mono-oxygenase from Mycobacteriumsp. strain HE5 ppt

Báo cáo khoa học: Kinetic and binding studies with purified recombinant proteins ferredoxin reductase, ferredoxin and cytochrome P450 comprising the morpholine mono-oxygenase from Mycobacteriumsp. strain HE5 ppt

... testedN-heterocycles. In order to obtain more information about the bind-ing properties of the active site of P450mor and the permitted access of molecules to it, the binding of different azole compounds to the ... conditions. However, from the slope of the initial linear range of the kinetic plot, the constants Vmax⁄ Km of 1.1 electronsÆmin)1Ænm)1forNHis-Fdmor and Vmax⁄ Km of 0.9 electronsÆmin)1Ænm)1for ... in a stable form without detectableformation of the inactive P420 species. The binding of substrates to cytochromes P450 usu-ally induces transition of the heme from the low-spinstate to the...
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Báo cáo Y học: Kinetic and biochemical analyses on the reaction mechanism of a bacterial ATP-citrate lyase ppt

Báo cáo Y học: Kinetic and biochemical analyses on the reaction mechanism of a bacterial ATP-citrate lyase ppt

... concentrations ( 0–4 mM). (B) A Lineweaver–Burkplot of the kinetic data. (C) A Hill plot of the kinetic data. Hill coefficients are indicated as nHvalues. The nHvalue of 0.45 is given in the lower ... concentration of 1 mMinto the reactionmixture. The results are shown in Table 1. The enzymeexhibited maximum activity in the presence of ATP, and in the presence of dATP showed 40% of this activity. In ... report [15], and mentioned in Materials and Methods. The homogen-eity of the recombinant protein was analyzed by SDS/PAGE (see below). Kinetic analysis of Cl-ACL Kinetic examination of Cl-ACL...
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Tài liệu Báo cáo khoa học: X-ray crystallographic and NMR studies of pantothenate synthetase provide insights into the mechanism of homotropic inhibition by pantoate docx

Tài liệu Báo cáo khoa học: X-ray crystallographic and NMR studies of pantothenate synthetase provide insights into the mechanism of homotropic inhibition by pantoate docx

... ade-nylosuccinate synthetase, one of whose substrates,IMP, binds to the GTP-binding site and inhibits the reaction [3 7–3 9]. The binding of pantoate to the ATP-binding site also reveals the origin of the negativecooperativity ... of pantoate bound in the ATP-binding pocket. Pantoatebinding to the ATP-binding site induced large changes in structure, mainlyfor backbone and side chain atoms of residues in the ATP bindingHXGH(3 4–3 7) ... showing the pan-toate–protein interactions in the canonical pantoate-binding site (site I).Fig. S4. Two-dimensional projection showing the pan-toate–protein interactions in the ATP-binding site (site...
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Tài liệu Báo cáo khoa học: Kinetic analysis of effector modulation of butyrylcholinesterase-catalysed hydrolysis of acetanilides and homologous esters pdf

Tài liệu Báo cáo khoa học: Kinetic analysis of effector modulation of butyrylcholinesterase-catalysed hydrolysis of acetanilides and homologous esters pdf

... with ATMA and unaffected with o-NAC. The actual binding site of serotonin cannot be inferred from these results. Although serotonin can bind to the active site binding locus (W82), binding to PAS ... (a) the peripheral anionic site is involved in the non-linear activation and inhibition of the wild-type enzyme; and (b) in the presence of charged substrates, the ligand does not bind to the ... carboxyles-terases and albumin, was controlled by nondenaturingPAGE and activity staining [26,68].Kinetics of substrate hydrolysis in the absence of ligand Kinetic assays with neutral and positively and negativelycharged...
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Báo cáo khoa học: Kinetic characterization of methionine c-lyases from the enteric protozoan parasite Entamoeba histolytica against physiological substrates and trifluoromethionine, a promising lead compound against amoebiasis ppt

Báo cáo khoa học: Kinetic characterization of methionine c-lyases from the enteric protozoan parasite Entamoeba histolytica against physiological substrates and trifluoromethionine, a promising lead compound against amoebiasis ppt

... decrease in the kcatforCys. This implies that the hydroxyl group of Tyr108 of EhMGL1 is actively involved in the b-elimination and c-elimination of the C–S bond, but not the b-elimina-tion of the ... vector and the XbaI site in the EhMGL1 gene, the product of the nes-ted PCR was replaced with the corresponding region in pGEX–EhMGL1 [13] to produce pGEX–EhMGL1fl. The following mutations were introduced ... 7.0) containing1mm dithiothreitol and 20 lm PLP, and 3–6 0 lgÆmL)1 of the recombinant enzymes, at 37 °C for 10 min. The ranges of substrate concentrations for the measurement of kinetic parameters...
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Báo cáo khoa học: Spectroscopic and kinetic properties of the horseradish peroxidase mutant T171S Evidence for selective effects on the reduced state of the enzyme potx

Báo cáo khoa học: Spectroscopic and kinetic properties of the horseradish peroxidase mutant T171S Evidence for selective effects on the reduced state of the enzyme potx

... demonstrated the ‘sensitivity’ of the proximal region in determining the electronic and structural properties of the haem pocket. In the present study we attempt to obtain furtherinsights into the extent ... an insight into the role of key catalytic residues [ 6–9 ]. A significant outcome of many of these studies [6,1 0–1 2] has been the discovery of coupled effects that can be understood on the basis of ... important linking residue between the structuralproximal Ca2+ion and the proximal haem ligand, in particular the methylgroup of Thr171 interdigitates with other proximal residues in the core of the...
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Tài liệu Báo cáo khoa học: Applications and trends in systems biology in biochemistry docx

Tài liệu Báo cáo khoa học: Applications and trends in systems biology in biochemistry docx

... acid,argininecatabolismto NO and polyaminesNG, aortaendothelialcellsLow affinity transporter and arginaseshare the control of the fluxesthrough the pathways involvingarginine as a precurser of ... Eng30, 20 2–2 16.87 Choline,glycinebetainebiosynthesisNicotianatabacumImport of choline into the chloroplastis a major but not the only importantconstraint on glycine betainesynthesis. The ... EscherichiacoliConstruction of a model and comparison of the simulation resultwith the experimental data indicatingthat the present model can simulate the effect of the specific geneknockouts to the changes in the metabolisms...
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