antibacterial inhibitors of the essential cell division protein ftsz
Báo cáo khoa học: A natural osmolyte trimethylamine N-oxide promotes assembly and bundling of the bacterial cell division protein, FtsZ and counteracts the denaturing effects of urea docx
Ngày tải lên :
30/03/2014, 16:20
... larger bundles of FtsZ protofilaments in the presence of TMAO compared with the control (Fig 6) The widths of the bundles of FtsZ Fig Effects of TMAO on denaturant-induced perturbation of the far-UV ... reduction in the GTPase activity of FtsZ in the presence of TMAO may be partly due to the solvophobic effects of TMAO on FtsZ that reduces the binding of GTP to FtsZ TMAO enhanced aggregation of FtsZ ... counteracting ability of the osmolyte does not arise from the stabilization of the native state but arises primarily from the destabilization of the unfolded state of the protein in the presence of osmolyte...
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Báo cáo toán học: "Chemical composition and antibacterial activity of the essential oils from Launaea resedifolia L." docx
Ngày tải lên :
20/06/2014, 20:20
... there are no reports about the chemical content and biological effect of the essential oils of L resedifolia There no reports on the essential oils of the species of the genus launaea except that ... noteworthy that the results of this study may be considered as the first report on the composition of the essential oils of this endemic species 2.6 Antimicrobial activity The quantification of antibacterial ... order of their elution on the HP-5MS non-polar column (Table 1) A total of 19 compounds were identified, representing 86.68% of the total oil The esters made up the largest component of the oil...
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báo cáo hóa học:" Chemical composition and antibacterial activity of the essential oils from Launaea resedifolia L." potx
Ngày tải lên :
21/06/2014, 17:20
... there are no reports about the chemical content and biological effect of the essential oils of L resedifolia There no reports on the essential oils of the species of the genus launaea except that ... noteworthy that the results of this study may be considered as the first report on the composition of the essential oils of this endemic species 2.6 Antimicrobial activity The quantification of antibacterial ... order of their elution on the HP-5MS non-polar column (Table 1) A total of 19 compounds were identified, representing 86.68% of the total oil The esters made up the largest component of the oil...
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Báo cáo hóa học: " Chemical composition and antibacterial activity of the essential oils from Launaea resedifolia L" pdf
Ngày tải lên :
21/06/2014, 19:20
... noteworthy that the results of this study may be considered as the first report on the composition of the essential oils of this endemic species Chahma A voucher specimen was deposited at the herbarium ... in this regard, plant essential oils may offer a great potential and hope Several studies have reported the efficacy of antibacterials obtained from the essential oils of various plant species ... 0.09 and 0.69 depending on the microorganism being tested Antibacterial activities of these essential oils were due to abundance of overall chemical constituents The antibacterial activity besides...
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Tài liệu Color Atlas of Pharmacology (Part 12): Inhibitors of the RAA System ppt
Ngày tải lên :
26/01/2014, 19:20
... membranous sacs of the sarcoplasmic reticulum (SR); c) Ca2+ bound to the inside of the plasmalemma The plasmalemma of cardiomyocytes extends into the cell interior in the form of tubular invaginations ... impair the pumping action of the heart, or when there is a threat of other complications The choice of drug is empirical If the desired effect is not achieved, another drug is tried Combinations of ... Overview of Modes of Action (A) The pumping capacity of the heart is regulated by sympathetic and parasympathetic nerves (pp 84, 105) Drugs capable of interfering with autonomic nervous function therefore...
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Tài liệu Báo cáo khoa học: Salt-induced formation of the A-state of ferricytochrome c – effect of the anion charge on protein structure docx
Ngày tải lên :
19/02/2014, 05:20
... been marked, for the sake of image clarity the positively charged clusters located on the protein surface [11] The distribution of lysines around the heme crevice at the ‘front’ of the molecule is ... comparison of the kinetic behavior of the mutants with that of the acid-denatured protein in the reaction with sulfate (Fig 9B) As mentioned above, at 395 nm the (sulfate-induced) refolding kinetics of ... different affinities of the two anions for the protein [11,17] We also monitored the effect of sulfate on the perchlorate-induced A-state As shown in Fig 6, addition of sulfate strengthens the 416 nm dichroic...
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Tài liệu Báo cáo khoa học: Interaction of the small heat shock protein with molecular mass 25 kDa (hsp25) with actin doc
Ngày tải lên :
20/02/2014, 23:20
... electrophoresis The quantity of actin in the pellet was plotted against the total quantity of actin in the sample Results Heat denaturation of actin Before starting the investigation of the HSP25–actin ... peak at 7.65 mL on the elution profile Increase of the temperature of incubation was accompanied by the simultaneous increase of the peak eluted at 7.65 mL and decrease of the peak eluted at 8.65 ... heating of actin at 43 °C induced rather mild changes in the structure of actin The samples of actin heated at 43 °C have a more hydrophilic environment of W residues than the intact protein, ...
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Tài liệu Báo cáo Y học: Proteolysis of bovine b-lactoglobulin during thermal treatment in subdenaturing conditions highlights some structural features of the temperature-modified protein and yields fragments with low immunoreactivity pptx
Ngày tải lên :
21/02/2014, 15:20
... in these preparations could stem from the inability of the hydrolytic reaction to address all the sequential epitopes even in the denatured protein In fact, despite the apparent simplicity of the ... to what happens in the very compact native protein or in the aggregated products of extensive thermal denaturation of BLG [6,8], thus making even the most inner parts of the protein accessible, ... amount of time At the end of the heat treatment the mixtures were placed in an ice/water bath, and the enzymatic activity was stopped by lowering the pH of the reaction mixture to by addition of...
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Tài liệu Báo cáo Y học: Identification and characterization of the Escherichia coli stress protein UP12, a putative in vivo substrate of GroEL pptx
Ngày tải lên :
22/02/2014, 07:20
... association of newly synthesized unfolded proteins with the heat-shock protein GroEL Nature 336, 254–257 25 Lorimer, G.H (1996) A quantitative assessment of the role of the chaperonin proteins in protein ... respectively In order to estimate the ratio between the amounts of UP12 and the total amount of protein in the extracts, a series of samples containing determined amounts of the purified UP12 were separated ... from 15 and 30 lg of the cell lysate without (lanes and 3) or in the presence of ATP (lanes and 4) was detected with anti-UP12 Ig Samples (3 and lg of total proteins) of the cell extract that...
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Báo cáo khoa học: Structural mobility of the monomeric C-terminal domain of the HIV-1 capsid protein pptx
Ngày tải lên :
07/03/2014, 06:20
... Furthermore, the internal motions of each bond vector are independent of each other, but the rotational diffusion of the molecule affects each of those bond vectors identically [42,43] On the other ... responsible, from a thermodynamic point of view, for the binding of the monomeric species of CAC? We have previously discussed the variation in the free energy of binding as a function of the changes ... frequency of the 15 N, xH is the Larmor frequency of the 1H, is the ˚ length of the amide bond vector (1.02 A), and r|| and r^ are the parallel and perpendicular components of the CSA tensor...
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Báo cáo khoa học: Solution structure and backbone dynamics of the XPC-binding domain of the human DNA repair protein hHR23B docx
Ngày tải lên :
07/03/2014, 17:20
... further our knowledge with respect to the mechanisms of action of these proteins, it is crucial that we define the precise boundaries of the STI1-homologous domain and compare the structures of these ... solubilized the protein fragment in 10 mm CHAPS buffer The combination of these two A Dynamic structure of XPC-binding domain of hHR23B procedures markedly improved the quality of the 15NHSQC ... used for the experiment at 500 MHz (25 instead of 27 °C), which gives better HSQC spectra Because of the known dependence of the overall correlation time sc on the molecular size of various proteins...
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Báo cáo khoa học: Halogenated benzimidazoles and benzotriazoles as inhibitors of the NTPase/helicase activities of hepatitis C and related viruses ppt
Ngày tải lên :
08/03/2014, 02:20
... crystal structure of the complex of the catalytic subunit of Zea mays CK2 with TBBT [43], the latter is located in the CK2 active site normally occupied by the purine moieties of the natural substrates ... pattern of response to TBBT and TCBT [27] Somewhat unexpected was the finding that, using the RNA substrate, the compounds examined (with the exception of TBBT) were much weaker inhibitors of the ... of 1.5–5.5 lM) of the helicase activities of HCV, WNV and Suv3(D1–159), but not JEV The tetrachlorobenzotriazole TCBT is only a weak inhibitor of the HCV enzyme, and a moderate inhibitor of the...
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Báo cáo khoa học: Functional fine-mapping and molecular modeling of a conserved loop epitope of the measles virus hemagglutinin protein pdf
Ngày tải lên :
08/03/2014, 08:20
... In some of the conformers a hydrogen bond was predicted between the carbonyl atom of the Cys386 residue and the main chain nitrogen atom of residue Ile390 The total contact surface of the epitope ... Similarly, the e-amino group of K387 could form a salt bridge with the close carboxyl group of E395 and further stabilize the peptide structure within the complex with the antibody In the virus, the ... constrained by the scaffold formed by flanking sequences Interactions with the microenvironment of the protein further reduce the plasticity/flexibility of such an epitope In contrast, the flexibility...
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Báo cáo khoa học: Identification of crucial residues for the antibacterial activity of the proline-rich peptide, pyrrhocoricin pot
Ngày tải lên :
08/03/2014, 10:20
... verified the binding of pyrrhocoricin to the E coli DnaK fragment and the lack of a sequence analogous to that of S aureus (Fig 6) To study the interaction of the antibacterial peptide and the synthetic ... followed by the spectra of the antibacterial peptide protein fragment mixtures While the measured spectrum of the E coli fragment–pyrrhocoricin mixture is different from the mathematical sum of the individual ... presence of the carbohydrate side-chain, however, may modify either the binding to the target protein or the ability of the peptide to penetrate cells via through-space effects The importance of Arg19...
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Báo cáo Y học: Properties of the Na+/H+ exchanger protein Detergent-resistant aggregation and membrane microdistribution potx
Ngày tải lên :
08/03/2014, 16:20
... amount at the 105–110 kDa size The amount of 105–110 kDa protein was reduced and in many instances evidence of aggregation was evident at the top of the gels The amount of aggregate present at the ... Properties of the Na+/H+ exchanger (Eur J Biochem 269) 4891 Fig Distribution of caveolin and the Na+/H+ exchanger in membrane subfractions from AP-1 cells transfected with the NHE1 isoform of the Na+/H+ ... from AP-1 cells transfected with the NHE1 isoform of the Na+/H+ exchanger Membrane fractions were prepared and visualized as described in Fig 3A–C The relative distribution of proteins in the gels...
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Báo cáo Y học: Interaction of the anterior fat body protein with the hexamerin receptor in the blowfly Calliphora vicina pot
Ngày tải lên :
08/03/2014, 22:20
... post-translational control of protein biosynthesis One of the most detailed investigations of fat body proteins has been the metabolism of the storage protein arylphorin, which belongs to the class of hexamerins ... fluorescent cells of the anterior fat body lobe and nonfluorescent cells of the central lobe in the immunofluorescence experiment (Fig 6A) The whole-mount in situ hybridization revealed that the AFP ... interaction of AFP and peptides derived from the hexamerin receptor precursor can only take place in the anterior lobe of the fat body because of the large amounts of AFP in this tissue Fig Northern...
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Báo cáo khoa học: Restriction point control of the mammalian cell cycle via the cyclin E/Cdk2:p27 complex doc
Ngày tải lên :
15/03/2014, 09:20
... absolute time point, then the sum of control coefficients would add up to )1 (as they for the control on the cell division time) The four steps delaying the RP the most (i.e with the highest positive ... E/Cdk2:p27 For each of the intermediates, the ratio of its gradient in the correlation plot and the gradient of cyclin E/Cdk2:p27 was close to the value of the co-control coefficient of the intermediate ... whereas the others advanced the RP (negative control) The CiRP for all reaction steps sums up to 0; this is to be expected on the basis of our definition of RP as a fraction of the cell division...
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Báo cáo khoa học: Biochemical properties of the human guanylate binding protein 5 and a tumor-specific truncated splice variant Mark Wehner and Christian Herrmann doc
Ngày tải lên :
15/03/2014, 10:20
... account) The size of the protein complex is only slightly increased when nucleotide-free or in the presence of GTP As with hGBP5ta, the complex is increased to the size of a tetramer after binding of ... conserved in the primary structure of the GTPase domain of hGBP5, so the formation of GMP must be impaired in an as yet unknown manner Sequence alignments of the large GTP-binding domains of hGBP1, ... for the lack of GMP formation (see Fig S2) The similar hydrolytic activities of the a ⁄ b and C-terminally truncated forms of hGBP5 are in contrast to that of the analogous deletion mutant of...
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Báo cáo khoa học: Crystal structures of the human SUMO-2 protein at 1.6 A and 1.2 A resolution ppt
Ngày tải lên :
16/03/2014, 18:20
... the presence of Factor Xa (Novagen) This step removes the His10 tag to generate the truncated SUMO-2 protein (9–93 amino acids) The protein solution was then purified a second time, in which the ... is particularly evident in the regions of 28–43 and 71–83, that correspond to the strand b2, the N terminus of the helix a1, the helix a2, and the connecting loop to the strand b5 (Fig 3A,D) Such ... with the Gly93 of another The crystal structures of diubiquitin and tetraubiquitin showed some alternatives of the quaternary conformations of ubiquitin polymer for efficient recognition by the...
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Báo cáo khoa học: Alizarine derivatives as new dual inhibitors of the HIV-1 reverse transcriptase-associated DNA polymerase and RNase H activities effective also on the RNase H activity of non-nucleoside resistant reverse transcriptases pot
Ngày tải lên :
22/03/2014, 16:20
... in the presence of different concentrations of the rst inhibitor, in the absence or contemporaneous presence of the second inhibitor, leads to a series of lines that are parallel if the two inhibitors ... signicant inuence of the pp stacking interaction with Trp229 on the orientation of the ligand in the binding site (Fig 5A) Inter1450 Fig Representation of the overall structure of the HIV-1 RT heterodimer ... occur The binding mode of K-49 in the Y181C RT is different, and the contribution of the pp stacking interaction is lost Furthermore, the low number of good contacts with RT leads to instability of...
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