Search Within
显示 1-30 共 197 条结果 关于 "


" 范围 论文
Danielle M Williamson et al.
The Journal of biological chemistry, 288(26), 19154-19165 (2013-05-09)
The proprotein convertase furin requires the pH gradient of the secretory pathway to regulate its multistep, compartment-specific autocatalytic activation. Although His-69 within the furin prodomain serves as the pH sensor that detects transport of the propeptide-enzyme complex to the trans-Golgi
Kyo Kobayashi et al.
Pharmaceutical development and technology, 20(2), 219-226 (2013-11-30)
Medical-grade collagen peptide is used as an additive agent in pharmaceutical formulations; however, it is unknown as to whether the compound exerts antioxidant effects in vitro. In this study, we evaluated the antioxidant effects of medical-grade collagen peptide on reactive
Claudia Hernández-Mosqueira et al.
Biochimica et biophysica acta, 1850(12), 2485-2496 (2015-09-24)
Alkaline phosphatases are dimeric hydrolytic enzymes that dephosphorylate nucleotides and proteins. AP-TNAP is found primarily in skeletal tissues were it plays a major role in the mineralization of the extracellular matrix and bone formation. In this study we found through
Pang-Hung Hsu et al.
PloS one, 10(8), e0135174-e0135174 (2015-08-14)
The budding yeast Saccharomyces cerevisiae has recently been described as an emerging opportunistic fungal pathogen. Fungal cell wall mannoproteins have been demonstrated to be involved in adhesion to inert surfaces and might be engaged in virulence. In this study, we
Tomas F M Kuijpers et al.
The FEBS journal, 280(23), 6184-6195 (2013-10-12)
Sulfite salts are widely used as antibrowning agents in food processing. Nevertheless, the exact mechanism by which sulfite prevents enzymatic browning has remained unknown. Here, we show that sodium hydrogen sulfite (NaHSO3) irreversibly blocks the active site of tyrosinase from
Shweta Singh et al.
Microbial cell factories, 7, 28-28 (2008-10-14)
The large-scale production of G-protein coupled receptors (GPCRs) for functional and structural studies remains a challenge. Recent successes have been made in the expression of a range of GPCRs using Pichia pastoris as an expression host. P. pastoris has a
Darío Ortiz de Orué Lucana et al.
The Journal of biological chemistry, 289(49), 34214-34228 (2014-10-25)
The extracellular protein HbpS from Streptomyces reticuli interacts with iron ions and heme. It also acts in concert with the two-component sensing system SenS-SenR in response to oxidative stress. Sequence comparisons suggested that the protein may bind a cobalamin. UV-visible
L De Meyer et al.
International journal of pharmaceutics, 496(1), 75-85 (2015-05-20)
Spin-freezing as alternative freezing approach was evaluated as part of an innovative continuous pharmaceutical freeze-drying concept for unit doses. The aim of this paper was to compare the sublimation rate of spin-frozen vials versus traditionally frozen vials in a batch
Michael Sippach et al.
Biochimica et biophysica acta, 1838(7), 1760-1768 (2014-03-04)
The conformational dynamics of the histidine ABC transporter HisQMP2 from Salmonella enterica serovar Typhimurium, reconstituted into liposomes, is studied by site-directed spin labeling and double electron-electron resonance spectroscopy in the absence of nucleotides, in the ATP-bound, and in the post-hydrolysis
Justyna Borowska et al.
Journal of biological inorganic chemistry : JBIC : a publication of the Society of Biological Inorganic Chemistry, 20(6), 989-1004 (2015-07-19)
This work is focused on the study of DNA binding and cleavage properties of 2'-deoxyadenosines modified with ester/amide of histidine (his(6)dA ester, his(6)dA amide) and their copper(II) complexes. To determine the coordination mode of the complex species potentiometric and spectroscopic
Qizhao Wang et al.
Scientific reports, 5, 13593-13593 (2015-09-05)
Morphology-controlled synthesis of CdS can significantly enhance the efficiency of its photocatalytic hydrogen production. In this study, a novel three-dimensional (3D) flower-like CdS is synthesized via a facile template-free hydrothermal process using Cd(NO3)2•4H2O and thiourea as precursors and L-Histidine as
Qais Al-Hadid et al.
Molecular and cellular biology, 34(15), 2903-2916 (2014-05-29)
Histidine protein methylation is an unusual posttranslational modification. In the yeast Saccharomyces cerevisiae, the large ribosomal subunit protein Rpl3p is methylated at histidine 243, a residue that contacts the 25S rRNA near the P site. Rpl3p methylation is dependent upon
Alessio Innocenti et al.
Bioorganic & medicinal chemistry letters, 19(13), 3430-3433 (2009-05-26)
An activation study of the membrane-associated carbonic anhydrase (CA, EC isoform XV with a series of natural and non-natural amino acids and aromatic/heterocyclic amines is reported. Murine CA XV was strongly activated by some amino acids (d-Phe, l-/d-DOPA, d-Trp
Tridib K Goswami et al.
Dalton transactions (Cambridge, England : 2003), 43(31), 11988-11999 (2014-06-28)
Ferrocene-conjugated copper(ii) complexes [Cu(Fc-aa)(aip)](ClO4) () and [Cu(Fc-aa)(pyip)](ClO4) () of l-amino acid reduced Schiff bases (Fc-aa), 2-(9-anthryl)-1H-imidazo[4,5-f][1,10]phenanthroline (aip) and 2-(1-pyrenyl)-1H-imidazo[4,5-f][1,10]phenanthroline (pyip), where Fc-aa is ferrocenylmethyl-l-tyrosine (Fc-Tyr in , ), ferrocenylmethyl-l-tryptophan (Fc-Trp in , ) and ferrocenylmethyl-l-methionine (Fc-Met in , ), were
Marie-Rose Abdo et al.
Bioorganic & medicinal chemistry letters, 19(9), 2440-2443 (2009-04-07)
Activation of the human carbonic anhydrase (CA, EC isozymes I, II (cytosolic) and IX (transmembrane, tumor-associated isoform) with a series of arylsulfonylhydrazido-l-histidines incorporating 4-substituted-phenyl, pentafluorophenyl- and beta-naphthyl moieties was investigated. The compounds showed a weak hCA I activation profile
V G Doroshenko et al.
Prikladnaia biokhimiia i mikrobiologiia, 49(2), 149-154 (2013-06-26)
Strain MG 1655+hisGr hisL'-Delta, purR, which produces histidine with a weight yield of approximately 12% from glucose, was constructed through directed chromosomal modifications of the laboratory Escherichia coli strain MG 1655+, which has a known genome sequence. A feedback-resistant ATP-phosphoribosyl
Saroj Kumar Amar et al.
Toxicology letters, 239(3), 182-193 (2015-10-07)
Solar UV radiation is main factor of photocarcinogenesis, photoageing, and phototoxicity; thus, protection from UV radiation is major concern. Sunscreens containing UV filters are suggested as sun safe practices, but safety of UV filters remains in controversies. Benzophenone-1 (BP1) is
K Brawn et al.
Acta physiologica Scandinavica. Supplementum, 492, 9-18 (1980-01-01)
An enzymic flux of O2- and H2O2 caused strand breaks in the supercoiled covalently closed circular Col El plasmid. Subnanomolar levels of superoxide levels of superoxide dismutase or of catalase prevented this attack on DNA, signifying that both O2- and
Edward A Berry et al.
Journal of biological inorganic chemistry : JBIC : a publication of the Society of Biological Inorganic Chemistry, 13(4), 481-498 (2008-04-18)
Early investigation of the electron paramagnetic resonance spectra of bis-histidine-coordinated membrane-bound ferriheme proteins led to the description of a spectral signal that had only one resolved feature. These became known as "highly anisotropic low-spin" or "large g(max)" ferriheme centers. Extensive
Lance M Hellman et al.
Methods (San Diego, Calif.), 54(1), 31-38 (2010-12-29)
Many recombinant proteins carry an oligohistidine (His(X))-tag that allows their purification by immobilized metal affinity chromatography (IMAC). This tag can be exploited for the site-specific attachment of chromophores and fluorophores, using the same metal ion-nitrilotriacetic acid (NTA) coordination chemistry that
Neha Garg et al.
Proceedings of the National Academy of Sciences of the United States of America, 110(18), 7258-7263 (2013-04-17)
The biosynthesis of several classes of ribosomally synthesized and posttranslationally modified peptides involves dehydration of serine and threonine residues. For class I lantibiotics, thiopeptides, and goadsporin, this dehydration is catalyzed by lanthionine biosynthetic enzyme B (LanB) or LanB-like proteins. Although
Ronald F Parsons et al.
Current opinion in organ transplantation, 19(2), 100-107 (2014-02-21)
To update the reader on the recent literature in liver, kidney, pancreas, and intestine static cold preservation, and to identify which solutions are most advantageous for each organ. The comparison of randomized trials of histidine-tryptophan-ketoglutarate (HTK), Celsior, and University of
Hirotsugu Hiramatsu et al.
Biochemistry, 52(13), 2371-2380 (2013-03-21)
The pH dependence of the β-galactoside binding activity of human galectin-1 (hGal-1) was investigated by fluorescence spectroscopy using lactose as a ligand. The obtained binding constant Kb was 2.94 ± 0.10 mM(-1) at pH 7.5. The Kb value decreased at
Yipin Wu et al.
American journal of physiology. Regulatory, integrative and comparative physiology, 309(7), R747-R756 (2015-08-01)
Inwardly rectifying potassium channels play essential roles in renal physiology across phyla. Barium-sensitive K(+) conductances are found on the basolateral membrane of a variety of insect Malpighian (renal) tubules, including Drosophila melanogaster. We found that barium decreases the lumen-positive transepithelial
Chi Nguyen et al.
Nature, 505(7483), 427-431 (2013-12-24)
Acyl carrier protein (ACP) transports the growing fatty acid chain between enzymatic domains of fatty acid synthase (FAS) during biosynthesis. Because FAS enzymes operate on ACP-bound acyl groups, ACP must stabilize and transport the growing lipid chain. ACPs have a
Cyprian E Oshoma et al.
PloS one, 10(8), e0135626-e0135626 (2015-08-19)
Formic acid is one of the major inhibitory compounds present in hydrolysates derived from lignocellulosic materials, the presence of which can significantly hamper the efficiency of converting available sugars into bioethanol. This study investigated the potential for screening formic acid
Gurunath Surampalli et al.
The Journal of pharmacy and pharmacology, 67(8), 1083-1099 (2015-04-14)
In this study, a comprehensive and comparative cytotoxic evaluation of morin against verapamil on rat intestinal epithelium as P-gp inhibitors through in-vitro gastrointestinal short-term toxicity assays involving permeability studies for safety evaluation was investigated. In this study, the effect of
Ritesh Kumar et al.
Biochemistry, 53(13), 2112-2125 (2014-03-15)
Hemophores from Pseudomonas aeruginosa (HasAp), Serratia marcescens (HasAsm), and Yersinia pestis (HasAyp) bind hemin between two loops. One of the loops harbors conserved axial ligand Tyr75 (Y75 loop) in all three structures, whereas the second loop (H32 loop) contains axial
Griet Van Zeebroeck et al.
Nature chemical biology, 5(1), 45-52 (2008-12-09)
Transporter-related nutrient sensors, called transceptors, mediate nutrient activation of signaling pathways through the plasma membrane. The mechanism of action of transporting and nontransporting transceptors is unknown. We have screened 319 amino acid analogs to identify compounds that act on Gap1
Juleane Lunardi et al.
Current topics in medicinal chemistry, 13(22), 2866-2884 (2013-10-12)
Worldwide, tuberculosis is the leading cause of morbidity and mortality due to a single bacterial pathogen, Mycobacterium tuberculosis (Mtb). The increasing prevalence of this disease, the emergence of multi-, extensively, and totally drug-resistant strains, complicated by co-infection with the human
页码 1 来自 7
页码 1 来自 7