Polyphyllin I activates AMPK to suppress the growth of non-small-cell lung cancer via induction of autophagy.

abstract：:The presence of multiple proteases in the culture filtrate of Streptomyces moderatus was detected. After preliminary purification by ammonium sulfate precipitation and decolorization using DEAE-cellulose, the fractionation of various proteases was carried out using CM-trisacryl cation-exchange chromatography. By this ...

journal_title：Archives of biochemistry and biophysics

authors： Chandrasekaran S,Dhar SC

更新日期：1987-09-01 00:00:00

abstract：:Ceramidases play a critical role in generating sphingosine-1-phosphate by hydrolyzing ceramide into sphingosine, a substrate for sphingosine kinase. In order to elucidate its transcriptional regulation, we identify here a putative promoter region in the 5'-UTR of the human neutral CDase (nCDase) gene. Using human geno...

journal_title：Archives of biochemistry and biophysics

authors： O'Neill SM,Yun JK,Fox TE,Kester M

更新日期：2011-07-01 00:00:00

abstract：:Advancements in peptide fusion technologies to maximize the protein production has taken a big leap to fulfill the demands of post-genomics era targeting elucidation of structure/function of the proteome and its therapeutic applications, by over-expression in heterologous expression systems. Despite being most preferr...

journal_title：Archives of biochemistry and biophysics

authors： Yadav DK,Yadav N,Yadav S,Haque S,Tuteja N

更新日期：2016-12-15 00:00:00

abstract：:Investigations into the enzymes responsible for the reductive activation of antineoplastic agents are of particular interest with regard to the use of these agents in the treatment of solid tumors. Xanthine oxidase (EC 1.1.3.22; XO) and xanthine dehydrogenase (EC 1. 1.1.204; XDH) are two enzymes capable of the reducti...

journal_title：Archives of biochemistry and biophysics

authors： Yee SB,Pritsos CA

更新日期：1997-11-15 00:00:00

abstract：:Phenylalanine ammonia-lyase (PAL) catalyzes the beta-elimination of ammonia from L-phenylalanine to trans-cinnamic acid. A study of inhibition of PAL by phenol, ortho-cresol, and meta-cresol gave mixed inhibition; para-cresol is not an inhibitor. The calculated values of K(i) and alphaK(i) are phenol, K(i)=2.1+/-0.5 m...

journal_title：Archives of biochemistry and biophysics

authors： Alunni S,Cipiciani A,Fioroni G,Ottavi L

更新日期：2003-04-15 00:00:00

abstract：:Flavopiridol has been shown to induce cell cycle arrest and apoptosis in various tumor cells in vitro and in vivo. Using immobilized flavopiridol, we identified glycogen phosphorylases (GP) from liver and brain as flavopiridol binding proteins from HeLa cell extract. Purified rabbit muscle GP also bound to the flavopi...

journal_title：Archives of biochemistry and biophysics

authors： Kaiser A,Nishi K,Gorin FA,Walsh DA,Bradbury EM,Schnier JB

更新日期：2001-02-15 00:00:00

abstract：:Stark absorption spectroscopy was applied to clarify the structural differences between carotenoids bound to the B800-820 and B800-850 LH2 complexes from a purple photosynthetic bacterium Phaeospirillum (Phs.) molischianum DSM120. The former complex is produced when the bacteria are grown under stressed conditions of ...

journal_title：Archives of biochemistry and biophysics

authors： Horibe T,Qian P,Hunter CN,Hashimoto H

更新日期：2015-04-15 00:00:00

abstract：:Several experiments were carried out to study the difference between two isozymes (alpha(+) and alpha) of (Na+ + K+)-ATPase in the conformational equilibrium. Rat brain (Na+ + K+)-ATPase was much more thermolabile than the kidney enzyme. Both enzymes were protected from heat inactivation not only by Na+ and K+, but al...

journal_title：Archives of biochemistry and biophysics

authors： Matsuda T,Iwata H

更新日期：1988-06-01 00:00:00

abstract：:The interactions between various dietary cancer chemopreventive phytochemicals in drug transporter functions are not well studied. In this study, the effects of genistein and resveratrol on the multidrug resistance protein 2 (MRP2) expression and the underlying molecular mechanisms were investigated using HepG2-C3 cel...

journal_title：Archives of biochemistry and biophysics

authors： Kim JH,Chen C,Tony Kong AN

更新日期：2011-08-15 00:00:00

abstract：:Oxygenation of a tryptophan residue analog by ascorbate in the presence of catalytic amounts of iron(II) and ethylenediaminetetraacetic acid (EDTA) has been studied. Under physiological conditions, reaction of the tryptophan derivative (N-t-butoxycarbonyl-L-tryptophan) with Fe(II)-EDTA and ascorbate resulted mainly in...

journal_title：Archives of biochemistry and biophysics

authors： Uchida K,Enomoto N,Itakura K,Kawakishi S

更新日期：1990-05-15 00:00:00

abstract：:Multidrug resistance (MDR) caused by overexpressed permeability-glycoprotein (P-gp) in cancer cells is the main barrier for the cure of cancers. P-gp can pump many chemotherapeutic drugs, which is a viable target to overcome P-gp-mediated MDR by efficient inhibitors of P-gp. However, limited understanding of the efflu...

journal_title：Archives of biochemistry and biophysics

authors： Wang L,Sun Y

更新日期：2020-12-15 00:00:00

abstract：:Mutagenic substitution of the invariant D42 and D169 residues in phosphoribulokinase (PRK) with amino acids that contain neutral side chains (e.g., alanine or asparagine) results in large decreases in catalytic efficiency (10(5)- and 10(4)-fold for replacement of D42 and D169, respectively). To further evaluate the im...

journal_title：Archives of biochemistry and biophysics

authors： Runquist JA,Miziorko HM

更新日期：2002-09-15 00:00:00

abstract：:Amylomaltase (AM) catalyzes inter- and intra-molecular transglycosylation reactions of glucan to yield linear and cyclic oligosaccharide products. The functional roles of the conserved histidine at position 461 in the active site of AM from Corynebacterium glutamicum (CgAM) was investigated. H461 A/S/D/R/W were constr...

journal_title：Archives of biochemistry and biophysics

authors： Tumhom S,Krusong K,Kidokoro SI,Katoh E,Pongsawasdi P

更新日期：2018-08-15 00:00:00

abstract：:Rat hepatic 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase was purified to homogeneity using agarose-HMG-CoA affinity chromatography. Additional protein was isolated from the affinity column with 0.5 M KCl that demonstrated no HMG-CoA reductase activity, yet comigrated with purified HMG-CoA reductase on sod...

journal_title：Archives of biochemistry and biophysics

authors： Whitehead TR,Vlahcevic ZR,Beg ZH,Hylemon PB

更新日期：1984-05-01 00:00:00

abstract：:Electron spin lattice relaxation times (T1) and the phase memory times (Tm) were obtained for the synthetic melanin system from 3-hydroxytyrosine (dopa) by means of electron spin echo spectroscopy at 77 degrees K. Saturation behavior of the ESR spectra of melanins in melanin-containing tissue and of the synthetic mela...

journal_title：Archives of biochemistry and biophysics

authors： Okazaki M,Kuwata K,Miki Y,Shiga S,Shiga T

更新日期：1985-10-01 00:00:00

abstract：:The subcellular mechanism of alkenyl halide S-conjugate-induced nephrotoxicity was studied in mitochondria isolated from rat kidney cortex in vitro using the cysteine conjugate of hexachloro-1,3-butadiene, i.e., S-pentachlorobutadienyl-L-cysteine (PCBC) as a model substrate. Respiring mitochondria exposed to various c...

journal_title：Archives of biochemistry and biophysics

authors： Wallin A,Jones TW,Vercesi AE,Cotgreave I,Ormstad K,Orrenius S

更新日期：1987-11-01 00:00:00

abstract：:The visible and near-uv absorption and circular dichroic spectra were determined for spinach and poplar plastocyanin under a variety of conditions. The visible spectra showed that the copper center was invariant to changes in species, chemical modification with ethylenediamine, and addition of high concentrations of s...

journal_title：Archives of biochemistry and biophysics

authors： Draheim JE,Anderson GP,Pan RL,Rellick LM,Duane JW,Gross EL

更新日期：1985-02-15 00:00:00

abstract：:Glycine residues are recognized as important structural determinants in nucleotide-binding domains of many enzymes. The functional significance of seven glycine residues invariant in all 22 eNTPDase sequences was therefore examined. Glycine-to-alanine mutants of eNTPDase3 were analyzed for nucleotidase activities and ...

journal_title：Archives of biochemistry and biophysics

authors： Kirley TL,Yang F,Ivanenkov VV

更新日期：2001-11-01 00:00:00

abstract：:It has been proposed that negatively charged amino acids on the surface of reductase and positively charged amino acids on the surface of P450 mediate the binding of both proteins through electrostatic interactions. In this study, we used a site-directed mutagenesis approach to determine a role for two lysine residues...

journal_title：Archives of biochemistry and biophysics

authors： Cvrk T,Strobel HW

更新日期：2001-01-15 00:00:00

abstract：:Amino acid substitutions at many positions in the a subunit of F1F0 ATP synthase result in impaired proton translocation and altered catalytic activity. In this work, we demonstrate that amino acid substitutions in the a subunit affect the epsilon subunit. In mutant F1F0 ATP synthases, the epsilon subunit was studied ...

journal_title：Archives of biochemistry and biophysics

authors： Gardner JL,Cain BD

更新日期：1999-01-15 00:00:00

abstract：:This paper describes a theory for the mechanism of three-state transition of proteins which is often observed in aqueous organic cosolvent systems, i.e., from the native, via intermediate to helical forms. The first transition, accompanied by changes in the tertiary and/or secondary structures, was explained by larger...

journal_title：Archives of biochemistry and biophysics

authors： Arakawa T,Goddette D

更新日期：1985-07-01 00:00:00

abstract：:Although in vitro models are often used in beta-carotene research, knowledge about the uptake and metabolism of beta-carotene in cell lines is lacking. We measured by HPLC the intracellular levels of beta-carotene and its metabolites in 9 human intestinal and lung cell lines after exposure to 1 microM beta-carotene du...

journal_title：Archives of biochemistry and biophysics

authors： Franssen-van Hal NL,Bunschoten JE,Venema DP,Hollman PC,Riss G,Keijer J

更新日期：2005-07-01 00:00:00

abstract：:Calcium-induced changes in protein solubility play a role in a variety of important biological processes including the deposition of bone and dentin and the secretion of milk. The phenomena of salt-induced (calcium) precipitation of proteins (salting-out), and the resolubilization of these proteins at higher salt conc...

journal_title：Archives of biochemistry and biophysics

authors： Farrell HM Jr,Kumosinski TF,Pulaski P,Thompson MP

更新日期：1988-08-15 00:00:00

abstract：:The effect of copper sulfate (CuSO4) on both hepatic oxidative stress and heme oxygenase induction was studied. A strong increase in in vivo rat liver chemiluminescence was observed 1 h after Cu(II) administration. To evaluate liver antioxidant enzymatic defenses, superoxide dismutase, catalase, and glutathione peroxi...

journal_title：Archives of biochemistry and biophysics

authors： Ossola JO,Groppa MD,Tomaro ML

更新日期：1997-01-15 00:00:00

abstract：:The stability of glutathione peroxidase was assessed in vitro via oxidative inactivation by peroxides and a peroxidizing fatty acid and by renaturation and proteolysis. The stability of glutathione peroxidase to methyl ethyl ketone peroxide, H2O2, linoleic acid hydroperoxide, and peroxidizing methyl linolenate was com...

journal_title：Archives of biochemistry and biophysics

authors： Condell RA,Tappel AL

更新日期：1983-06-01 00:00:00

abstract：:The kinetic properties of UDP-glucuronosyltransferase were measured after brief treatment of liver microsomes at alkaline pH, followed by assay with p-nitro-phenol as aglycone, at pH 7.5. Enzyme activity increased in a graded fashion as the pH of pretreatment was increased above 8.0, with apparent maximal activation o...

journal_title：Archives of biochemistry and biophysics

authors： Dannenberg A,Wong T,Zakim D

更新日期：1990-03-01 00:00:00

abstract：:Unlike monooxygenases, molybdenum-containing hydroxylases catalyze the hydroxylation of carbon centers using oxygen derived ultimately from water, rather than O(2), as the source of the oxygen atom incorporated into the product, and do not require an external source of reducing equivalents. The mechanism by which this...

journal_title：Archives of biochemistry and biophysics

authors： Hille R

更新日期：2005-01-01 00:00:00

abstract：:The importance of the sn-glycerol- 3-phosphate (G-3-P) electron transfer shuttle in hormonal regulation of gluconeogenesis was examined in hepatocytes from rats with decreased mitochondrial G-3-P dehydrogenase activity (thyroidectomized) or increased G-3-P dehydrogenase activity [triiodothyronine (T(3)) or dehydroepia...

journal_title：Archives of biochemistry and biophysics

authors： Kneer N,Lardy H

更新日期：2000-03-01 00:00:00

abstract：:We have developed a protocol to purify apo-ovine (o) prostaglandin endoperoxide H(2) synthase-1 (PGHS-1) to homogeneity from ram seminal vesicles. The resulting apo enzyme can then be reconstituted with Co(3+)-protoporphyrin IX instead of Fe(3+)-protoporphyrin IX to produce a native-like, but functionally inert, enzym...

journal_title：Archives of biochemistry and biophysics

authors： Malkowski MG,Theisen MJ,Scharmen A,Garavito RM

更新日期：2000-08-01 00:00:00

abstract：:The essential Zn(II) in bovine liver dihydropyrimidine amidohydrolase (DHPase) was removed by incubation with 2,6-dipicolinic acid and replaced with Mn(II). Electron paramagnetic resonance studies of Mn(II) binding show that there are four binding sites per tetramer, and the dissociation constant at pH 7.5 is 13.5 mic...

journal_title：Archives of biochemistry and biophysics

authors： Lee MH,Pettigrew DW,Sander EG,Nowak T

更新日期：1987-12-01 00:00:00