Abstract：
:Arginase activity is elevated in livers of diabetic animals compared to controls and there is evidence that this is due in part to increased specific activity (activity/mg arginase protein). To investigate the molecular basis of this increased activity, the physicochemical and kinetic properties of hepatic arginase from diabetic and control mice were compared. Two types of arginase subunits with molecular weights of 35,000 and 38,000 were found in both the diabetic and control animals and the subunits in these animals had similar, multiple ionic forms. Kinetic parameters of purified preparations of arginase for arginine (apparent Km and Vmax values) and the thermal stability of these preparations from diabetics and controls were also similar. Furthermore, no difference was found in the distribution of arginase activity among different subcellular liver fractions. Separation of basic and acidic oligomeric forms of arginase by fast-protein liquid chromatography resulted in a slightly different distribution of activity among the forms in the normal and diabetic group. The apparent Km values for Mn2+ of the basic form of the enzyme were 25 and 33 microM for the enzyme from normal and diabetic animals, respectively; for acidic forms, for which two apparent Km values were measured, the values were 8 and 197 microM for arginase from controls and 35 and 537 microM from diabetics. These results indicate that in diabetes, while no marked changes in the physicochemical characteristics of arginase are obvious, some changes are found in the interaction of arginase with its cofactor Mn.
journal_name
Arch Biochem Biophysjournal_title
Archives of biochemistry and biophysicsauthors
Spolarics Z,Bond JSdoi
10.1016/0003-9861(89)90455-4subject
Has Abstractpub_date
1989-11-01 00:00:00pages
426-33issue
2eissn
0003-9861issn
1096-0384pii
0003-9861(89)90455-4journal_volume
274pub_type
杂志文章abstract：:Sarcolemmal vesicles of white and red skeletal muscles of the rabbit were prepared by consecutive density gradient centrifugations in sucrose and dextran according to Seiler and Fleischer (1982, J. Biol. Chem. 257, 13,862-13,871). White and red muscle membrane fractions enriched in sarcolemma were characterized by hig...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/0003-9861(90)90501-o
更新日期：1990-06-01 00:00:00
abstract：:Several 2-halo-acyl-CoA derivatives have been synthesized to examine the interaction of these potential inhibitors of mitochondrial beta-oxidation with the purified medium chain acyl-CoA dehydrogenase from pig kidney. Racemic 2-bromo-, 2-chloro-, and 2-fluoro-octanoyl-CoA thioesters show 6.6, 33, and 3.5% of the activ...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1006/abbi.1993.1184
更新日期：1993-04-01 00:00:00
abstract：:A green manganese desferrioxamine complex is rapidly formed at room temperature upon stirring freshly precipitated manganese dioxide in a solution of the ligand. Spectral studies and low-temperature ESR indicate that this compound, which has been previously described as a manganese(III) complex, is better characterize...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/0003-9861(91)90447-q
更新日期：1991-08-15 00:00:00
abstract：:Five functional isoforms of a novel plant thiol methyltransferase from the leaves of cabbage (Brassica oleracea L.) were purified to electrophoretic homogeneity. Pooled, partly purified preparations of the enzyme were previously shown to methylate thiol compounds released upon the hydrolysis of glucosinolates. The enz...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1006/abbi.2000.1896
更新日期：2000-08-15 00:00:00
abstract：:The fertilization layer of Xenopus laevis eggs is formed by the cortical granule lectin binding to its ligand. The binding requires Ca2+, is specific for galactose, and functionally establishes a block to polyspermy at fertilization. We have designed a new enzyme-linked lectin assay for the cortical granule lectin (CG...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1006/abbi.1996.0398
更新日期：1996-09-15 00:00:00
abstract：:The influenza A virus nonstructural protein NS1 is a multifunctional dimeric protein that acts as a potent inhibitor of the host cellular antiviral state. The C-terminal effector domain of NS1 binds host proteins, including CPSF30, and is a target for the development of new antiviral drugs. Here we present crystallogr...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/j.abb.2009.12.008
更新日期：2010-02-15 00:00:00
abstract：:Phosphatidylinositol 3-kinase (PI3-kinase) is known to be a crucial regulator of muscle differentiation. However, its downstream pathway for this function is quite obscure. In this experiment we demonstrated the regulatory mechanism of the differentiation of H9c2 cardiomyoblasts, focusing on PI3-kinase, protein kinase...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1006/abbi.1999.1232
更新日期：1999-07-01 00:00:00
abstract：:Cadmium is toxic and carcinogenic to humans and animals. The testis and lung are the target organs for cadmium carcinogenesis. Heat shock proteins (HSPs) as well as metallothionein (MT) and glutathione (GSH) play an important role in protection against its toxicity. HSP32, also known as heme oxygenase-1, is a 32-kDa p...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1006/abbi.2000.1997
更新日期：2000-10-01 00:00:00
abstract：:We measured temporal oscillations of intracellular K+ concentration in yeast cells exhibiting glycolytic oscillations using fluorescence spectroscopy and microscopy methods. These oscillations showed the same period as those of glycolytic metabolites (NADH, ATP), indicating a strong coupling between them. We experimen...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/j.abb.2020.108257
更新日期：2020-03-15 00:00:00
abstract：:Dihydrocaffeic acid, a dietary constituent and a microbial metabolite of flavonoids, is an antioxidant, but few biological effects have been examined. After its production by microflora in the colon, dihydrocaffeic acid is absorbed and found in plasma as a combination of free and metabolized forms. Excess solar UV rad...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/j.abb.2008.01.019
更新日期：2008-08-15 00:00:00
abstract：:Hypertrophic scars are dermal fibrosis diseases that protrude from the surface of the skin and irregularly extend to the periphery, seriously affecting the appearance and limb function of the patient. In this study, we found that microRNA-130a (miR-130a) was increased in hypertrophic scar tissues and derived primary f...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/j.abb.2019.07.003
更新日期：2019-08-15 00:00:00
abstract：:The effects of positively charged compounds on a plasma membrane, type III phosphatidylinositol 4-kinase were studied. To determine whether the enzyme would respond differently to the compounds in a membrane-associated versus a soluble state, both the plasma membrane and solubilized (released by 0.01% (v/v) Triton X-1...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1006/abbi.1994.1366
更新日期：1994-08-15 00:00:00
abstract：:The reversible oxidation of protein cysteine residues is well recognized as an important regulatory mechanism in redox-dependent cell signaling. Cysteine oxidation is diverse in nature and involves various post-translational modifications (sulfenic acids, disulfides, etc.) and the specific functional or structural imp...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/j.abb.2017.01.008
更新日期：2017-02-15 00:00:00
abstract：:Sixteen mutants of Escherichia coli defective in H+-ATPase (proton-translocating ATPase) were tested for their ability to recombine with hybrid plasmids carrying various portions of the beta subunit cistron. Twelve mutations were mapped within the carboxyl half of the cistron corresponding to amino acid residues 279 t...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/0003-9861(83)90489-7
更新日期：1983-12-01 00:00:00
abstract：:A class II Zn(2+)-dependent fructose-1,6-bisphosphate (FBP)- aldolase was purified from an overproducer strain of Escherichia coli and characterized by standard biochemical techniques and 13C NMR spectroscopy. The principal finding of these studies was identification, by 13C NMR spectroscopy, of an enzyme-bound reacti...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1006/abbi.1995.1159
更新日期：1995-02-20 00:00:00
abstract：:Glycophorin from human red blood cells was exposed to ozone in aqueous solution. Amino acid analysis of glycophorin exposed to a 10-fold molar excess of ozone showed that the only residue affected was methionine. Both methionine residues of the protein were oxidized to methionine sulfoxide. Exposure of the oxidized pr...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/0003-9861(92)90491-e
更新日期：1992-05-15 00:00:00
abstract：:The radioactive, photoactivatable labeling probe [beta-32P]5-azidouridine 5'-diphosphoglucose has recently been shown to label a 62-kDa protein in crude homogenates and in partially purified enzyme preparations without photoactivation. Here, we report that a portion of this radioactivity is due to labeling of phosphog...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/0003-9861(90)90526-5
更新日期：1990-07-01 00:00:00
abstract：:The effect of the skeletal myopathy-causing E117K mutation in human β-tropomyosin on actomyosin structure during the ATPase cycle was studied using fluorescent probes bound to actin subdomain 1 and the myosin head. Multistep changes in flexural rigidity of actin filament and in spatial arrangement of actin subdomain 1...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/j.abb.2014.03.007
更新日期：2014-05-01 00:00:00
abstract：:Caffeic acid O-methyltransferase (COMT) is one of a group of proteins present in alfalfa cell cultures which can be photoaffinity labeled with S-adenosyl-L-[methyl-3H]methionine. The enzyme was purified to homogeneity from elicitor-treated suspension cultures and shown to exist as an active monomer of subunit Mr 41,00...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/0003-9861(91)90492-2
更新日期：1991-06-01 00:00:00
abstract：:Fresh human A1 erythrocytes, washed and pretreated in phosphate buffer with or without papain, were incubated at 37 degrees C with blood group-degrading enzymes from the human fecal Ruminococcus torques strain IX-70. The effects were assayed as changes in hemagglutination patterns, and blood group activities of alkali...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/0003-9861(91)90546-u
更新日期：1991-11-01 00:00:00
abstract：:Liver cells (HepG2 and primary hepatocytes) overexpressing CYP2E1 and exposed to arachidonic acid (AA) were previously shown to lose viability together with enhanced lipid peroxidation. These events were blocked in cells pre-incubated with antioxidants (alpha-tocopherol, glutathione ethyl ester), or in HepG2 cells not...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/j.abb.2006.10.018
更新日期：2007-01-15 00:00:00
abstract：:Providing clean and affordable drinking water without harmful disinfection byproducts generated by conventional chemical disinfectants gives rise to the need for technological innovation. Nanotechnology has great potential in purifying water and wastewater treatment. A graphene oxide-silver (GO-Ag) nanocomposite with ...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/j.abb.2016.04.018
更新日期：2016-08-15 00:00:00
abstract：:In the Escherichia coli class Ia ribonucleotide reductase (RNR), the best characterized RNR, there is no spectroscopic evidence for the existence of the postulated catalytically essential thiyl radical (R-S(*)) in the substrate binding subunit R1. We report first results on artificially generated thiyl radicals in R1 ...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1006/abbi.2001.2658
更新日期：2002-01-01 00:00:00
abstract：:The short term response of the L-6 cell line of rat skeletal myoblasts to elevated extracellular iron concentrations was studied. It was found in all cases that iron as the nitrilotriacetate (NTA) chelate was effective at donating iron to the cells and at stimulating ferritin synthesis. After 48 h in 50 microM ferric ...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/0003-9861(83)90044-9
更新日期：1983-08-01 00:00:00
abstract：:Actinomycin D (act-D) anchors itself into DNA-base pairs by intercalation and thereby inhibits mRNA synthesis. It has been well established that act-D elicits apoptosis in various cell types involving endothelial cells. However, the regulatory mechanisms of actinomycin D-induced apoptotic cell death still remain uncle...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/j.abb.2004.03.028
更新日期：2004-05-15 00:00:00
abstract：:The enzyme catalase catalyzes the breakdown of hydrogen peroxide into oxygen and water. It is the main regulator of hydrogen peroxide metabolism. Hydrogen peroxide is a highly reactive small molecule formed as a natural byproducts of energy metabolism. Excessive concentrations may cause significant damages to protein,...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章,评审
doi：10.1016/j.abb.2012.02.005
更新日期：2012-09-15 00:00:00
abstract：:The study aimed to evaluate the impact of adenosine receptors (ARs) on human colon tumor cells (HCT 116, HT-29) growth and sensitivity to 5-Fluorouracil (5-FU) an anticancer chemotherapeutic drug. The exposure of cancer cells to a selective A(3)-AR agonist (IB-MECA) resulted in an increase in HT-29 cells number, where...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/j.abb.2013.02.007
更新日期：2013-05-01 00:00:00
abstract：:In an effort to model the interaction of lipid-based DNA delivery systems with anionic surfaces, such as a cell membrane, we have utilized microelectrophoresis to characterize how electrokinetic measurements can provide information on surface charge and binding characteristics. We have established that cationic lipids...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1006/abbi.1999.1201
更新日期：1999-06-01 00:00:00
abstract：:Prior exposure of guinea pig macrophages to LPS (lipopolysaccharide) resulted in reduced cAMP-generating responses to prostaglandin E1 and epinephrine. LPS-induced refractoriness was diminished when LPS treatment was carried out in the presence of an inhibitor of prostaglandin synthesis, hydrocortisone, or indomethaci...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1016/0003-9861(86)90334-6
更新日期：1986-05-01 00:00:00
abstract：:Human CXCR4 was expressed in Sf9 insect cells using the Bac-to-Bac baculovirus expression system. The recombinant receptor exhibited ligand binding activities with a K(d) value (3.3 nM) comparable to that of the native receptor. The role of four conserved cysteinyl residues was explored by site-directed mutagenesis. E...
journal_title：Archives of biochemistry and biophysics
pub_type： 杂志文章
doi：10.1006/abbi.1999.1555
更新日期：2000-01-01 00:00:00
