Inactivation of proteases and esterases by halomethylated derivatives of dihydrocoumarins.

abstract：:Honeybee-plant relationships are based on a conditioning process in which olfactory (plant aroma) and gustatory cues (mainly nectars) are closely linked, leading to a selective foraging behaviour. Among crops dependent upon entomophilous cross-pollination, the sunflower has recently undergone extensive expansion due t...

journal_title：Biochimie

authors： Pham-Delegue MH,Etievant P,Masson C

更新日期：1987-06-01 00:00:00

abstract：:Lysosomal cysteine proteinases were fractionated from partially purified rat muscle lysosomes. By gel filtration on Sephadex G75, cathepsin D was separated from two thiol-requiring proteolytic fractions of Mr 25 000 and 55 000, respectively. By chromatofocusing, the first fraction (Mr = 25 000) was resolved into three...

journal_title：Biochimie

authors： Obled A,Ouali A,Valin C

更新日期：1984-09-01 00:00:00

abstract：:The reactivity of sonicated phosphatidylcholine-cholesterol liposomes with cholesterol : oxygene oxydoreductase, an enzyme which catalyses the oxidation of the 3 beta hydroxyl group of cholesterol to a ketone group, is compared with that of ternary system phosphatidylcholine-cholesterol-Thesit. Regardless to the phosp...

journal_title：Biochimie

authors： Peynet J,Delattre J,Canal J,Rousselet F,Girard ML

更新日期：1979-01-01 00:00:00

abstract：:The microbial resistance to antibiotics is a genuine global threat. Consequently, a search of new inhibitors remains of acute importance due to the increasing spread of multidrug resistance. Here we present a new type of non-β-lactam β-lactamase inhibitor PA-34 based on natural phenoxyaniline, identified using compute...

journal_title：Biochimie

authors： Grigorenko VG,Andreeva IP,Rubtsova MY,Deygen IM,Antipin RL,Majouga AG,Egorov AM,Beshnova DA,Kallio J,Hackenberg C,Lamzin VS

更新日期：2017-01-01 00:00:00

abstract：:Parkinson's disease (PD), a neurodegenerative disorder, is characterized by a loss of dopaminergic neurons in the substantia nigra (SN) of the brain and it is well known that the pathogenesis of PD is related to a number of risk factors including oxidative stress. Antioxidant 1 (ATOX1) protein plays a crucial role in ...

journal_title：Biochimie

authors： Eum WS,Shin MJ,Lee CH,Yeo HJ,Yeo EJ,Choi YJ,Kwon HJ,Kim DS,Kwon OS,Lee KW,Han KH,Park J,Kim DW,Choi SY

更新日期：2019-01-01 00:00:00

abstract：:The insomniac protein of Drosophila melanogaster (INC) has a crucial role in sleep homeostasis as flies lacking the inc gene exhibit strikingly reduced and poorly consolidated sleep. Nevertheless, in vitro characterizations of INC biophysical properties and partnerships have not been yet reported. Here we report the h...

journal_title：Biochimie

authors： Pirone L,Smaldone G,Esposito C,Balasco N,Petoukhov MV,Spilotros A,Svergun DI,Di Gaetano S,Vitagliano L,Pedone EM

更新日期：2016-12-01 00:00:00

abstract：:The rate of hydrolysis of long chain triglycerides by pure bovine pancreatic lipase has been determined in the presence of variable amounts of bile salts and colipase. Cofactor-free lipase is strongly inhibited by sodium taurodesoxycholate and by mixed bovine bile salts at concentrations higher than the critical micel...

journal_title：Biochimie

authors： Rathelot J,Julien R,Canioni P,Coeroli C,Sarda L

更新日期：1975-01-01 00:00:00

abstract：:Pterocarpans, a family of isoflavonoids found in the diverse Fabaceae, display potent cytotoxic activity over a panel of tumor cell lines, and among those tested, 2,3,9- trimethoxypterocarpan displays the most potent activity. This study evaluates the effects of 2,3,9-trimethoxypterocarpan and its related derivatives ...

journal_title：Biochimie

authors： Militão GC,Prado MP,Pessoa C,de Moraes MO,Silveira ER,Lima MA,Veloso PA,Costa-Lotufo LV,Machado-Santelli GM

更新日期：2014-09-01 00:00:00

abstract：:The functions of residues 57-RY-58, G60, L77, 80-GSGR-83, I101, T104, 134-GY-135, N155, V157 and 160-LV-161 in human arsenic (III) methyltransferase (hAS3MT) 5 Å around S-adenosylmethionine (SAM) have not been studied. Herein, sixteen mutants were designed by substituting these residues with Ala. Mutants G60A, G80A, I...

journal_title：Biochimie

authors： Li X,Geng Z,Chang J,Song X,Wang Z

更新日期：2014-12-01 00:00:00

abstract：:Purified chromatin isolated from lymphocytic cells derived from patients with acute leukemia, or other lymphoproliferative disorders has been compared with chromatin isolated from normal human lymphocytic cells by gel electrophoresis and differential gradient ultracentrifugation. Thermal denaturation studies showed hi...

journal_title：Biochimie

authors： Desai LS,Wulff UC,Foley GE

更新日期：1975-01-01 00:00:00

abstract：:Four crystal structures of transfer RNA molecules were refined at 3 A resolution with the inclusion of the solvent molecules found in the difference maps: yeast tRNA-phe in the orthorhombic form, yeast tRNA-phe in the monoclinic form and yeast tRNA-asp in the A and B forms. Over 100 solvent molecules were located in e...

journal_title：Biochimie

authors： Westhof E,Dumas P,Moras D

更新日期：1988-02-01 00:00:00

abstract：:Triiodothyronine (T3), injected daily into rats, induces heart hypertrophy. In a recent work we have shown that a single T3 injection stimulates RNA synthesis and modifies the translational products of myocardial mRNAs in reticulocyte lysates, quantitatively and qualitatively. In this work we show that T3 induces smal...

journal_title：Biochimie

authors： Raymondjean M,Leibovitch SA,Leibovitch MP,Harel J,Kruh J

更新日期：1984-09-01 00:00:00

abstract：:Insect prophenoloxidase (PPO) is an essential innate immunity protein to induce pathogen into melanization. In Bombyx mori, pro-phenoloxidase-activating enzyme (PPAE) can directly cleave and activate PPO. However, PPO in Manduca sexta cannot be cleaved into active phenoloxidase (PO) by serine proteases unless cofactor...

journal_title：Biochimie

authors： Lu A,Li X,Hillyer JF,Beerntsen BT,Söderhäll K,Ling E

更新日期：2014-07-01 00:00:00

abstract：:As part of a project aimed at obtaining selective inhibitors and drug-like compounds targeting tRNA synthetases from trypanosomatids, we have elucidated the crystal structure of human cytosolic histidyl-tRNA synthetase (Hs-cHisRS) in complex with histidine in order to be able to compare human and parasite enzymes. The...

journal_title：Biochimie

authors： Koh CY,Wetzel AB,de van der Schueren WJ,Hol WG

更新日期：2014-11-01 00:00:00

abstract：:Fluorescence techniques were used to detect changes in the conformation of tRNA(Phe) that may occur during the peptidyl transferase reaction in which the tRNA appears to move between binding sites on ribosomes. Such a conformational change may be a fundamental part of the translocation mechanism by which tRNA and mRNA...

journal_title：Biochimie

authors： Odom OW,Hardesty B

更新日期：1987-09-01 00:00:00

abstract：:The cellular concentration of cyclic nucleotides is largely dependent upon the activity of the enzymatic system responsible for their degradation: cyclic nucleotide phosphodiesterase. This enzymatic system thus plays a crucial role in the regulation of the multiple functions which are modulated by cyclic nucleotides i...

journal_title：Biochimie

authors： Nemoz G,Prigent AF

更新日期：1984-02-01 00:00:00

abstract：:Colorectal cancer (CRC) is the third most diagnosed cancer in the western world, affecting 1 out of approximately 22 people in their lifetime. Several epidemiological studies suggest a positive association between high plasma cholesterol levels and colorectal cancer. However, the molecular mechanisms by which choleste...

journal_title：Biochimie

authors： Warns J,Marwarha G,Freking N,Ghribi O

更新日期：2018-10-01 00:00:00

abstract：:Glucose-6 phosphatase (G6Pase), a key enzyme of glucose homeostasis, catalyses the hydrolysis of glucose-6 phosphate (G6P) to glucose and inorganic phosphate. A deficiency in G6Pase activity causes type 1 glycogen storage disease (GSD-1), mainly characterised by hypoglycaemia. Genetic analyses of the two forms of this...

journal_title：Biochimie

authors： Soty M,Chilloux J,Casteras S,Grichine A,Mithieux G,Gautier-Stein A

更新日期：2012-03-01 00:00:00

abstract：:The interferon (IFN) system is a major effector of the innate immunity that allows time for the subsequent establishment of an adaptive immune response against wide-range pathogens. The effectiveness of IFN to control initial infection requires the cooperation between several pathways induced in the target cells. Rece...

journal_title：Biochimie

authors： Degols G,Eldin P,Mechti N

更新日期：2007-06-01 00:00:00

abstract：:tmRNA (10Sa RNA, ssrA) acts to rescue stalled bacterial ribosomes while encoding a peptide tag added trans-translationally to the nascent peptide, targeting it for proteolysis. Ribosomal protein S1 is required for tmRNA binding to isolated and poly U-programmed ribosomes. Mobility assays on native gels indicate that t...

journal_title：Biochimie

authors： Bordeau V,Felden B

更新日期：2002-08-01 00:00:00

abstract：:The Rap family of small GTP-binding proteins is composed by four different members: Rap1A, Rap1B, Rap2A and Rap2B. In this work we report the identification and characterization of a fifth member of this family of small GTPases. This new protein is highly homologous to Rap2A and Rap2B, binds labeled GTP on nitrocellul...

journal_title：Biochimie

authors： Paganini S,Guidetti GF,Catricalà S,Trionfini P,Panelli S,Balduini C,Torti M

更新日期：2006-03-01 00:00:00

abstract：:Human delta-aminolevulinic acid dehydratase (ALA-D) was purified 9 000-fold by salt precipitation, ion-exchange chromatography and gel filtration. These methods resulted into an electrophoretically and immunologically pure protein. The optimum pH of the enzyme is 6.6 and its Km with ALA : 4.8 X 10(-4) M. The enzymatic...

journal_title：Biochimie

authors： Despaux N,Comoy E,Bohuon C,Boudène C

更新日期：1979-01-01 00:00:00

abstract：:Well-defined quantities of *OH, O2*-,HO2* or RO2*)radicals (reactive oxygen species) can be specifically produced by radiolysis of water or ethanol. Such radical species can initiate one-electron oxidation or one-electron reduction reactions on numerous biological systems. The oxidative hypothesis of atherosclerosis c...

journal_title：Biochimie

authors： Bonnefont-Rousselot D

更新日期：2004-12-01 00:00:00

abstract：:A novel approach to genetic sequence analysis is presented. This approach, based on compression of algorithms, has been launched simultaneously by Grumbach and Tahi, Milosavljevic and Rivals. To reduce the description of an object, a compression algorithm replaces some regularities in the description by special codes....

journal_title：Biochimie

authors： Rivals E,Dauchet M,Delahaye JP,Delgrange O

更新日期：1996-01-01 00:00:00

abstract：:RNA phosphodiester bonds can be cleaved by metal ions, of which Pb2+ is one of the most effective. It can cleave both generally and site-specifically, depending on the substrate and the conditions. In addition, metal ions are also known to cleave ester bonds between amino acid and the 3'-end of transfer RNA. Here we r...

journal_title：Biochimie

authors： Otzen DE,Barciszewski J,Clark BF

更新日期：1994-01-01 00:00:00

abstract：:Adrenoleukodystrophy (ALD) is an X-linked peroxisomal disorder characterized by a progressive demyelination of the central nervous system and adrenal insufficiency. Clinical phenotypes of different severity are frequently observed within the same kindred. ALD is characterized biochemically by the accumulation of very-...

journal_title：Biochimie

authors： Aubourg P,Mosser J,Douar AM,Sarde CO,Lopez J,Mandel JL

更新日期：1993-01-01 00:00:00

abstract：:Sodium channel alpha subunit type 1 (SCN1A) is voltage gated ion channel which plays critical role in membrane excitability. A common SCN1A IVS5-91G>A (rs3812718) allele has been attributed to be a possible modifying factor for epilepsy susceptibility and therapeutic response. In the present study, we enrolled 485 epi...

journal_title：Biochimie

authors： Kumari R,Lakhan R,Kumar S,Garg RK,Misra UK,Kalita J,Mittal B

更新日期：2013-06-01 00:00:00

abstract：:Glycolipids constitute a class of molecules with various biological activities. Among them, sugar-based bolaamphiphiles characterized by their biocompatibility, biodegradability and lower toxicity, became interesting for the development of efficient and low cost lipid-based drug delivery systems. Their activity seems ...

journal_title：Biochimie

authors： Nasir MN,Crowet JM,Lins L,Obounou Akong F,Haudrechy A,Bouquillon S,Deleu M

更新日期：2016-11-01 00:00:00

abstract：:Porphyromonas gingivalis uses a type IX secretion system (T9SS) to deliver more than 30 proteins to the bacterial surface using a conserved C-terminal domain (CTD) as an outer membrane translocation signal. On the surface, the CTD is cleaved and an anionic lipopolysaccharide (A-PLS) is attached by PorU sortase. Among ...

journal_title：Biochimie

authors： Veillard F,Sztukowska M,Nowakowska Z,Mizgalska D,Thøgersen IB,Enghild JJ,Bogyo M,Potempa B,Nguyen KA,Potempa J

更新日期：2019-11-01 00:00:00

abstract：:Genetic elements coding for proteins that present amino acid identity with the conserved motifs of retroviral reverse transcriptases constitute the retroid family. With the exception of reverse transcriptases encoded by mitochondrial plasmids of Neurospora, all reverse transcriptases have an absolute requirement for a...

journal_title：Biochimie

authors： Marquet R,Isel C,Ehresmann C,Ehresmann B

更新日期：1995-01-01 00:00:00