EPR detection of phytophenoxyl radicals stabilized by zinc ions: evidence for the redox coupling of plant phenolics with ascorbate in the H2O2-peroxidase system.

abstract：:Maculatin 1.1 is an antimicrobial peptide isolated from the Australian tree frog Litoria genimaculata that adopts an amphipathic, alpha-helical structure in solution. Its orientation and conformation when incorporated to pre-formed DMPG (1,2-dimyristoyl-sn-glycero-3-phosphoglycerol) and DMPC (1,2-dimyristoyl-sn-glycer...

journal_title：FEBS letters

authors： Chia CS,Torres J,Cooper MA,Arkin IT,Bowie JH

更新日期：2002-02-13 00:00:00

abstract：:We have found that SV40 infection of CV1 cells induces the synthesis of a 72 kDa protein that upon molecular cloning was shown to be the product of the hsc70 gene. The above gene product was found to be mainly virus inducible, in contrast to the hsp70 gene product which was mainly heat inducible. The two genes were fo...

journal_title：FEBS letters

authors： Sainis I,Angelidis C,Pagoulatos G,Lazaridis I

更新日期：1994-12-05 00:00:00

abstract：:PA28, a 200 kDa activator of 20S proteasomes, was purified from human placenta and was gel electrophoretically resolved into two different subunits, alpha and beta. In reconstitution experiments, alpha-subunits alone were found to re-associate forming homooligomers with an M(r) of about 200 kDa, which elicit a stimula...

journal_title：FEBS letters

authors： Kuehn L,Dahlmann B

更新日期：1996-09-30 00:00:00

abstract：:Nitrogen dioxide (NO2.) is often present in inhaled air and may be generated in vivo from nitric oxide. Exposure of human blood plasma to NO2. caused rapid losses of ascorbic acid, uric acid and protein thiol groups, as well as lipid peroxidation and depletions of alpha-tocopherol, bilirubin and ubiquinol-10. No incre...

journal_title：FEBS letters

authors： Halliwell B,Hu ML,Louie S,Duvall TR,Tarkington BK,Motchnik P,Cross CE

更新日期：1992-11-16 00:00:00

abstract：:The extents to which different rate constants limit the steady-state rate of an isolated enzyme can be quantified as the control coefficients of those constants and elemental steps. We have found that the sum of the control coefficients of rate constants characterising unidirectional rates depleting a particular enzym...

journal_title：FEBS letters

authors： Kholodenko BN,Westerhoff HV,Brown GC

更新日期：1994-07-25 00:00:00

abstract：:In the present study, we have explored the impact of deleting a single allele of PDK1 in T cell progenitors on alpha/beta and gamma/delta T cell development. The data show that deleting a single allele of PDK1 allows differentiation of alpha/beta T cells but prevents their proliferative expansion in the thymus. Accord...

journal_title：FEBS letters

authors： Kelly AP,Hinton HJ,Clarke RG,Cantrell DA

更新日期：2006-04-03 00:00:00

abstract：:Apicomplexan parasites contain a vestigial plastid called apicoplast which has been suggested to be a site of [Fe-S] cluster biogenesis. Here we report the cloning of lipoic acid synthase (LipA) from Toxoplasma gondii, a well known [Fe-S] protein. It is able to complement a LipA-deficient Escherichia coli strain, clea...

journal_title：FEBS letters

authors： Thomsen-Zieger N,Schachtner J,Seeber F

更新日期：2003-07-17 00:00:00

abstract：:The F(1)F(0) ATP synthase has been purified from the hyperthermophilic eubacterium Aquifex aeolicus and characterized. Its subunits have been identified by MALDI-mass spectrometry through peptide mass fingerprinting and MS/MS. It contains the canonical subunits alpha, beta, gamma, delta and epsilon of F(1) and subunit...

journal_title：FEBS letters

authors： Peng G,Bostina M,Radermacher M,Rais I,Karas M,Michel H

更新日期：2006-10-30 00:00:00

abstract：:Recently, we have reported the presence of kinetin (N6-furfuryladenine) in commercially available DNA, in freshly extracted cellular DNA and in plant cell extracts. We have also found that kinetin has electrochemical properties which can be used for monitoring the level of this modified base in DNA. Here, for the firs...

journal_title：FEBS letters

authors： Barciszewski J,Siboska GE,Pedersen BO,Clark BF,Rattan SI

更新日期：1997-09-08 00:00:00

abstract：:Reconstituted Na+,K+-ATPase from either pig kidney or shark rectal glands was phosphorylated by cAMP dependent protein kinase, PKA. The stoichiometry was approximately 0.9 mol P(i)/mol alpha-subunit in the pig kidney enzyme and approximately 0.2 mol P(i)/mol alpha-subunit in the shark enzyme. In shark, Na+,K+-ATPase P...

journal_title：FEBS letters

authors： Cornelius F,Logvinenko N

更新日期：1996-02-19 00:00:00

abstract：:Mutations in the human mtDNA gene encoding subunit III of cytochrome c oxidase (CO) have been reported to cause MELAS and LHON. Poracoccus denitrificans cells expressing substitutions homologous to these MELAS- and LHON-causing mutations had lower growth yield than wild type cells and lower efficiency of proton pumpin...

journal_title：FEBS letters

authors： Mather MW,Rottenberg H

更新日期：1998-08-14 00:00:00

abstract：:The influence of aniso-osmolarity on the activity of the MAP kinases Erk-1 and Erk-2 was studied in C6 glioma cells. Hypo-osmotic treatment (205 mosmol/l) led to an increased activity of Erk-1 and Erk-2 within 3 min, which became maximal at 10 min and returned to basal level within 120 min. In contrast, Erk activity w...

journal_title：FEBS letters

authors： Sinning R,Schliess F,Kubitz R,Häussinger D

更新日期：1997-01-03 00:00:00

abstract：:The black-eyed pea trypsin and chymotrypsin inhibitor (BTCI) is a member of the Bowman-Birk protease inhibitor (BBI) family. The three-dimensional model of the BTCI-chymotrypsin complex was built based on the homology to Bowman-Birk inhibitors with known structures. An extensive theoretical and experimental study of t...

journal_title：FEBS letters

authors： de Freitas SM,de Mello LV,da Silva MC,Vriend G,Neshich G,Ventura MM

更新日期：1997-06-09 00:00:00

abstract：:Protein kinase C (PKC) from human promyelocytic leukemia HL-60 cells can be resolved into three fractions (peak, a, b and c) by hydroxyapatite column chromatography. Peak a and c enzymes are indistinguishable from the brain type II PKC having beta (beta I and beta II)-sequence and type III having alpha-sequence, respe...

journal_title：FEBS letters

authors： Hashimoto K,Kishimoto A,Aihara H,Yasuda I,Mikawa K,Nishizuka Y

更新日期：1990-04-09 00:00:00

abstract：:H/D isotope exchange effects on P680+. reduction by Yz and electron abstraction from the water oxidizing complex (WOC) in redox state S3 by YZOX were analyzed in PS II core complexes from spinach by measurements of laser flash induced absorption changes at 820 nm and 355 nm. The results obtained reveal: (1) the rate o...

journal_title：FEBS letters

authors： Karge M,Irrgang KD,Sellin S,Feinäugle R,Liu B,Eckert HJ,Eichler HJ,Renger G

更新日期：1996-01-08 00:00:00

abstract：:The transport of proteins from the cytoplasm into the nucleus is a multistep process. The nuclear localization sequence (NLS) of a transport substrate associates with the heterodimeric NLS-receptor which binds to a subset of proteins of the nuclear pore complex (NPC). Translocation through the NPC is energy-dependent ...

journal_title：FEBS letters

authors： Schlenstedt G

更新日期：1996-06-24 00:00:00

abstract：:The white-rot fungus Phanerochaete chrysosporium has two intracellular beta-glucosidases (BGL1A and BGL1B) belonging to glycoside hydrolase (GH) family 1. BGL1B effectively hydrolyzes cellobiose and cellobionolactone, but BGL1A does not. We have determined the crystal structure of BGL1A in substrate-free and gluconola...

journal_title：FEBS letters

authors： Nijikken Y,Tsukada T,Igarashi K,Samejima M,Wakagi T,Shoun H,Fushinobu S

更新日期：2007-04-03 00:00:00

abstract：:The OxyR protein is a transcriptional activator for a subset of peroxide stress-inducible genes, most of which are involved in defense systems against oxidative stress. Recently, it was demonstrated that purified OxyR has one intramolecular disulfide bond, which led to the proposal that the reversible disulfide bond f...

journal_title：FEBS letters

authors： Tao K

更新日期：1999-08-20 00:00:00

abstract：:The mitochondrial myopathy, encephalopathy, lactic acidosis and stroke-like episodes syndrome (MELAS) is a rare congenital disorder of mitochondrial DNA. Five single nucleotide substitutions within the human mitochondrial tRNALeu(UUR) gene have been reported to be associated with MELAS. Here, we provide in vitro evide...

journal_title：FEBS letters

authors： Hao R,Yao YN,Zheng YG,Xu MG,Wang ED

更新日期：2004-12-03 00:00:00

abstract：:The role of lipids in the interaction of the beta-adrenergic receptor (R) with the regulatory protein (Gs) was investigated. Solubilized preparations of R and of Gs from turkey erythrocytes were delipidated by gel filtration. They were subsequently combined and reconstituted by the addition of various lipids. When rec...

journal_title：FEBS letters

authors： Kirilovsky J,Steiner-Mordoch S,Selinger Z,Schramm M

更新日期：1985-04-08 00:00:00

abstract：:We have followed with autoradiography the course of DNA synthesis and with cytofluorometry the partition of DNA during mitosis, through the different phases of the life-span of human fibroblasts. Towards the end of the proliferative potential of the cell population, DNA synthesis was disturbed during the late part of ...

journal_title：FEBS letters

authors： Macieira-Coelho A

更新日期：1995-01-23 00:00:00

abstract：:Escherichia coli evolves H2 via multiple [Ni-Fe]-hydrogenases (Hyd). This activity under hyper- and hypo-osmotic stress was investigated with mutants lacking different Hyd enzymes during glycerol fermentation. Inhibitory effects of hypo-stress on H2 production was stronger at pH 6.5 in wild type and mutants except fhl...

journal_title：FEBS letters

authors： Trchounian K,Trchounian A

更新日期：2013-11-01 00:00:00

abstract：:We review the evidence for H+ translocation by reconstituted cytochrome c oxidase; attention is paid to those aspects which we feel most open to criticism. Possible alternative hypotheses are assessed, with regard to experiments carried out to test them directly and with regard to published data. We conclude that, whi...

journal_title：FEBS letters

authors： Casey RP,Azzi A

更新日期：1983-04-18 00:00:00

abstract：:The pancreatic ATP-sensitive potassium channels comprise two subunits: SUR1 and Kir6.2. Two SUR1 mutations, A116P and V187D, reduce channel activity causing persistent hyperinsulinemic hypoglycemia of infancy. We investigated whether these mutations cause temperature sensitive misfolding. We show that the processing d...

journal_title：FEBS letters

authors： Yang K,Fang K,Fromondi L,Chan KW

更新日期：2005-08-01 00:00:00

abstract：:Iron dependent regulator, IdeR, regulates the expression of genes in response to intracellular iron levels in M. tuberculosis. Orthologs of IdeR are present in all the sequenced genomes of mycobacteria. We have used a computational approach to identify conserved IdeR regulated genes across the mycobacteria and the gen...

journal_title：FEBS letters

authors： Yellaboina S,Ranjan S,Vindal V,Ranjan A

更新日期：2006-05-15 00:00:00

abstract：:CDK11(p58), a 58kDa protein of the PITSLRE kinase family, plays an important role in cell cycle progression, and is closely related to cell apoptosis. To gain further insight into the function of CDK11(p58), we screened a human fetal liver cDNA library for its interacting proteins using the yeast two-hybrid system. He...

journal_title：FEBS letters

authors： Zong H,Li Z,Liu L,Hong Y,Yun X,Jiang J,Chi Y,Wang H,Shen X,Hu Y,Niu Z,Gu J

更新日期：2005-07-04 00:00:00

abstract：:Phorbol-esters have been shown to modulate the beta-adrenergic-stimulated adenylyl cyclase in a number of cell lines. Here, using site directed mutagenesis, we investigate the role of the beta 2-adrenergic receptor phosphorylation by protein kinase C in this regulatory process. Mutation of the serine-261, -262, -344 a...

journal_title：FEBS letters

authors： Bouvier M,Guilbault N,Bonin H

更新日期：1991-02-25 00:00:00

abstract：:The HBx protein of hepatitis B virus is involved in deregulation of cell cycle and development of hepatocellular carcinoma. Since c-Myc also plays an important role in cell proliferation and tumor development, we studied its regulation by HBx in a human hepatoma cell line. Co-expression of HBx and c-Myc resulted in in...

journal_title：FEBS letters

authors： Kalra N,Kumar V

更新日期：2006-01-23 00:00:00

abstract：:The effects of guanine nucleotides on arachidonic acid (AA) release were studied in intact and saponin-permeabilized human platelets. While GTP[S] itself caused a stimulation of AA release in permeabilized cells, GTP[S], GDP[S], GTP, ATP and other nucleotides inhibited AA release in response to thrombin and other agon...

journal_title：FEBS letters

authors： Rehm AG,Wu H,Halenda SP

更新日期：1988-07-18 00:00:00

abstract：:Mutations of the cysteines (positions 668 and 714) were generated in the IF2 C domain of Bacillus stearothermophilus translation initiation factor IF2. The corresponding proteins were characterized functionally and structurally. Most (yet not all) amino acid replacements at both positions resulted in severe reduction ...

journal_title：FEBS letters

authors： Misselwitz R,Welfle K,Krafft C,Welfle H,Brandi L,Caserta E,Gualerzi CO

更新日期：1999-10-15 00:00:00