Abstract:
:Type III galactosemia is an inherited disease caused by mutations which affect the activity of UDP-galactose 4'-epimerase (GALE). We evaluated the impact of four disease-associated variants (p.N34S, p.G90E, p.V94M and p.K161N) on the conformational stability and dynamics of GALE. Thermal denaturation studies showed that wild-type GALE denatures at temperatures close to physiological, and disease-associated mutations often reduce GALE's thermal stability. This denaturation is under kinetic control and results partly from dimer dissociation. The natural ligands, NAD(+) and UDP-glucose, stabilize GALE. Proteolysis studies showed that the natural ligands and disease-associated variations affect local dynamics in the N-terminal region of GALE. Proteolysis kinetics followed a two-step irreversible model in which the intact protein is cleaved at Ala38 forming a long-lived intermediate in the first step. NAD(+) reduces the rate of the first step, increasing the amount of undigested protein whereas UDP-glucose reduces the rate of the second step, increasing accumulation of the intermediate. Disease-associated variants affect these rates and the amounts of protein in each state. Our results also suggest communication between domains in GALE. We hypothesize that, in vivo, concentrations of natural ligands modulate GALE stability and that it should be possible to discover compounds which mimic the stabilising effects of the natural ligands overcoming mutation-induced destabilization.
journal_name
Arch Biochem Biophysjournal_title
Archives of biochemistry and biophysicsauthors
Pey AL,Padín-Gonzalez E,Mesa-Torres N,Timson DJdoi
10.1016/j.abb.2014.07.030subject
Has Abstractpub_date
2014-11-15 00:00:00pages
103-14eissn
0003-9861issn
1096-0384pii
S0003-9861(14)00281-1journal_volume
562pub_type
杂志文章abstract::Two forms of the beta-glucosidase amygdalin hydrolase (AH I and II), which catalyze the hydrolysis of (R)-amygdalin to (R)-prunasin and D-glucose, have been purified over 200-fold from mature black cherry (Prunus serotina Ehrh.) seeds. These proteins showed very similar molecular and kinetic properties but could be re...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(86)90603-x
更新日期:1986-06-01 00:00:00
abstract::A search of the chicken expressed sequence tag (EST) database identified 2 cDNA clones that appeared to represent members of the SULT1B and SULT1C enzyme families. These cDNAs were fully sequenced and found to contain full-length inserts. Phylogenetic analysis of the derived amino acid sequences clearly placed them as...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/j.abb.2004.05.008
更新日期:2004-08-01 00:00:00
abstract::Heparin infusion in an experimental animal model of arterial injury causes a significant increase in the proteoglycan (PG) component of the extracellular matrix in the injured arteries (Snow, A. D., Bolender, R. P., Wight, T. N., and Clowes, A. W. (1990) Am. J. Pathol. 137, 313-330). The mechanisms responsible for thi...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1006/abbi.1996.0527
更新日期:1996-12-01 00:00:00
abstract::Previous studies demonstrated that liver microsomes from untreated rats catalyze the omega, omega-1, and omega-2 hydroxylation of prostaglandins [K. A. Holm, R. J. Engell, and D. Kupfer (1985) Arch. Biochem. Biophys. 237, 477-489]. The current study examined the regioselectivity of hydroxylation of PGE1 and PGE2 by pu...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(88)90117-8
更新日期:1988-02-15 00:00:00
abstract::Previously, we reported that several charged amino acids located in the alpha1-beta4 loop of the iron-sulfur protein are required to maintain the stability of the protein and its assembly into the cytochrome bc1 complex. The current study extends this analysis to several amino acids localized in the single alpha-helix...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1006/abbi.1998.0894
更新日期:1998-11-01 00:00:00
abstract::A comprehensive investigation of peptides derived from the 22-29 region of human islet amyloid polypeptide (hIAPP) that contain phenylalanine analogs at position 23 with a variety of electron donating and withdrawing groups, along with heteroaromatic surrogates, has been employed to interrogate how π-electron distribu...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/j.abb.2014.12.008
更新日期:2015-02-01 00:00:00
abstract::Plastidial acyl-acyl carrier protein:sn-glycerol-3-phosphate acyltransferase (GPAT; EC 2.3.1.15) catalyzes the acyl-acyl carrier protein-dependent sn-1 acylation of sn-glycerol 3-phosphate (G3P) to produce lysophosphatic acid. Functional recombinant Erysimum asperum GPAT (EaGPAT), devoid of transit peptide, was produc...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/j.abb.2014.05.007
更新日期:2014-07-15 00:00:00
abstract::Kirsten murine sarcoma virus-transformed Balb/c 3T3 cells (KiMSV) are highly tumorigenic and metastatic in the appropriate murine host, are loosely adherent to the tissue culture substratum, and can be readily detached from the substratum by ethylene glycol bis(beta-aminoethyl ether) N,N'-tetraacetic acid treatment le...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(83)90163-7
更新日期:1983-03-01 00:00:00
abstract::Methionine is oxidized to methionine sulfoxide by rat liver and kidney microsomes in an O2- and NADPH-dependent manner. In all microsomal assays, no methionine sulfone was detected. Use of a monoclonal antibody to rat liver cytochrome P-450 reductase, various cytochrome P-450 and peroxidase inhibitors, antioxidants, a...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1006/abbi.1996.0370
更新日期:1996-09-01 00:00:00
abstract::A soluble monoterpene primary alcohol:NADP+ oxidoreductase has been purified to apparent homogeneity from leaves of the catmint, Nepeta racemosa. The purified enzyme consisted of two polypeptides, with molecular masses of 42,000 and 40,000 Da, and contained zinc ions. A number of monoterpene alcohols (geraniol, nerol,...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1006/abbi.1995.1210
更新日期:1995-04-01 00:00:00
abstract::Reactive oxygen species (ROS) and ceramide are each partly responsible for the signal transduction of a variety of extracellular agents. Furthermore, the application of synthetic, short-chain ceramides mimics the cellular responses to these extracellular agents. However, the significance of ROS involvement in ceramide...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/s0003-9861(02)00496-4
更新日期:2002-11-01 00:00:00
abstract::Dihydropyrazine compounds, including 3-hydro-2,2,5,6-tetramethylpyrazine (DHP-3), are low-molecular-weight glycation products spontaneously generated in vivo and also ingested via food. Our preliminary study using microarray analysis demonstrated that DHP-3 induced zinc transporter-1 (ZnT-1) in HepG2 cells. It is well...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/j.abb.2015.07.002
更新日期:2015-08-15 00:00:00
abstract::Escherichia coli pyruvate oxidase (POXEC) requires FAD both for the oxidative decarboxylation of pyruvate to acetate and CO2 and for the formation of acetoin from pyruvate and acetaldehyde. Prior work has shown that the catalytic activity (kcat/Km) for POXEC in the oxidative reaction is stimulated approximately 450-fo...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1006/abbi.1993.1049
更新日期:1993-01-01 00:00:00
abstract::The application of 1H-nuclear Overhauser enhancement, 1H-spin-lattice-relaxation-time and 1H-chemical shift measurements for the assessment of the conformational preferences of oligosaccharides are briefly reviewed. It is demonstrated that additivity rules, for the correlation of the chemical shifts of similar hydroge...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(83)90128-5
更新日期:1983-02-15 00:00:00
abstract::The polymerization of alpha1-antitrypsin within the hepatic cell leads to alpha1-antitrypsin deficiency. Both the conformational changes and the kinetics of the polymerization process are poorly understood. Here we describe fluorescence experiments investigating the polymerization reaction using the fluorescent probe4...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1006/abbi.1998.0751
更新日期:1998-08-15 00:00:00
abstract::Increased protein kinase C (PKC) activity is associated with heart failure, and can target multiple cardiac troponin I (cTnI) residues in myocytes, including S23/24, S43/45 and T144. In earlier studies, cTnI-S43D and/or -S45D augmented S23/24 and T144 phosphorylation, which suggested there is communication between clu...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/j.abb.2017.05.019
更新日期:2017-08-01 00:00:00
abstract::Lipoxygenase is suggested to be involved in the early event of atherosclerosis by inducing plasma low-density lipoprotein (LDL) oxidation in the subendothelial space of the arterial wall. Since flavonoids such as quercetin are recognized as lipoxygenase inhibitors and they occur mainly in the glycoside form, we assess...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1006/abbi.1997.0455
更新日期:1998-01-15 00:00:00
abstract::A quinone produced from veratryl alcohol by lignin peroxidase from the white rot fungus Phanerochaete chrysosporium was tested for its ability to mediate reduction. The quinone (2-hydroxymethyl-5-methoxy-1,4-benzoquinone), reduced chemically or by cellobiose:quinone reductase isolated from cultures of the fungus, medi...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(95)90006-3
更新日期:1995-07-10 00:00:00
abstract::Preparative isoelectric focusing and gel filtration chromatography were used to purify a carboxypeptidase produced by the entomopathogenic fungus Metarhizium anisopliae during growth on cockroach cuticle. The enzyme was inhibited by diisopropyl fluorophosphate, implying involvement of a serine residue in catalysis. Ho...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1006/abbi.1994.1458
更新日期:1994-11-01 00:00:00
abstract::The regulation of phosphofructokinase during development of C2C12 myoblasts to myotubes was investigated. Enzyme activity was markedly increased during myogenic development. The increase was observed when enzyme activity was measured under optimal conditions and was not due to changes in the allosteric kinetic propert...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(90)90234-p
更新日期:1990-04-01 00:00:00
abstract::Activity of the rat liver microsomal vitamin K-dependent carboxylase has been studied at various concentrations of detergent. The activity which could be solubilized by 0.25% Triton X-100 was low but could be greatly increased if vitamin K-deficient rats were given vitamin K a few minutes before they were killed. At h...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(83)90519-2
更新日期:1983-04-01 00:00:00
abstract::The cardiomyopathy produced by the widely used anticancer drug adriamycin (ADR) is believed to be related to the production of reaction oxygen species and consumption of reduced glutathione (GSH) during redox cycling of the drug. Protection by vitamin E against the toxicity of ADR was studied in a model of compromised...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(87)90434-6
更新日期:1987-07-01 00:00:00
abstract::Glycosaminoglycan (GAG)-protein interactions regulate a myriad of physiologic and pathologic processes, yet an understanding of how these molecules interact is lacking. The role of the pattern and spacing of basic amino acids (arginine (R) and lysine (K)) in heparin binding sites was investigated using peptide analogs...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1006/abbi.1997.0147
更新日期:1997-07-01 00:00:00
abstract::[(3)H]8-OH-DPAT is a selective ligand for labeling 5-HT(1A) receptor sites. In competition binding experiments, we found that classic biogenic amine transporter inhibitors displaced [(3)H]8-OH-DPAT binding at its high-affinity binding sites in HeLaS3 cells. [(125)I]RTI-55 and [(3)H]paroxetine are known to specifically...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/j.abb.2010.10.024
更新日期:2011-02-01 00:00:00
abstract::The kinetics of bovine Cu,Zn superoxide dismutase were studied by pulse radiolysis. To ensure the absence of catalytically active free copper, commercially obtained holo-superoxide dismutase was demetallated, and the apo-superoxide dismutase concentrations were determined by isothermal titration calorimetry prior to r...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/j.abb.2005.05.016
更新日期:2005-07-15 00:00:00
abstract::The adrenal gland synthesizes steroid hormones from the adrenal cortex and catecholamines from the adrenal medulla. Both cortisol and adrenal androgens can have powerful effects on bone. The overproduction of cortisol in Cushing's disease leads to a dramatic reduction in bone density and an increase risk of fracture. ...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章,评审
doi:10.1016/j.abb.2010.06.007
更新日期:2010-11-01 00:00:00
abstract::The dependence of respiratory flux via the alternative pathway on the redox poise of the ubiquinone (Q) pool was investigated in soybean cotyledon mitochondria. A marked nonlinear relationship was observed between Q-pool reduction level and O2 uptake via the alternative oxidase. Significant engagement of the alternati...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(89)90173-2
更新日期:1989-08-15 00:00:00
abstract::We investigated the possible involvement of Al(3+)-induced alterations in membrane physical properties in Al(3+)-mediated inhibition of polyphosphoinositide (PPI) hydrolysis by the enzyme phosphatidylinositol-specific phospholipase C (PI-PLC). Liposomes composed of brain phosphatidylcholine (PC) or of PC and a mixture...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/s0003-9861(02)00557-x
更新日期:2002-12-15 00:00:00
abstract::P-815 mouse mastocytoma cells express the K isozyme of pyruvate kinase and the specific activity of this enzyme is increased in response to N6,2'-O-dibutyryladenosine 3':5'-cyclic monophosphate, 8-bromoadenosine 3':5'-cyclic monophosphate, cholera toxin, and epinephrine, all of which also elevate the intracellular con...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(89)90128-8
更新日期:1989-03-01 00:00:00
abstract::The phosphorylation state of several cardiac myofilament proteins changes with the level of stretch in intact, twitch-contracting cardiac muscles. It remains unclear which kinases are involved in the length-dependent phosphorylation of these proteins. We set out to investigate which kinases are involved after a step-w...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/j.abb.2012.10.005
更新日期:2013-07-01 00:00:00