The major pterin in Tetrahymena pyriformis is 6-(D-threo-1,2,3-trihydroxypropyl)-pterin (D-monapterin) and not 6-(L-threo-1,2-dihydroxypropyl)-pterin (ciliapterin).

abstract：:Using a new extended set of 13 amber suppressors in E coli, systematic amino-acid replacements were performed at positions 104(E) and 238(G) of TEM-1 beta-lactamase from PUC19. The enzyme is tolerant to most substitutions tested at position 104. Missense revertants E104K, E104S or E104Y exhibited only minor changes in...

journal_title：Biochimie

authors： Lenfant F,Labia R,Masson JM

更新日期：1990-06-01 00:00:00

abstract：:Purified chromatin from pig lymph nodes has been prepared and used for the isolation of chromatin proteins and non-histine proteins. Saccharose nuclei from this tissue have been used for the preparation of nuclear phenol-soluble phosphoproteins. The isolated proteins have been compared by analytical electrophoresis in...

journal_title：Biochimie

authors： Kilianska Z,Klyszejko-Stefanowicz L

更新日期：1976-01-01 00:00:00

abstract：:The x-ray structure of the monotopic membrane protein (S)-mandelate dehydrogenase (MDH) from Pseudomonas putida reveals an inherent flexibility of its membrane binding segment that might be important for its biological activity. The surface of MDH exhibits a concentration of the positive charges on one side and the ne...

journal_title：Biochimie

authors： Sukumar N,Liu S,Li W,Mathews FS,Mitra B,Kandavelu P

更新日期：2018-11-01 00:00:00

abstract：:Concern about the malicious applications of botulinum neurotoxin has highlighted the need for a new generation of safe and highly potent antitoxins. In this study, we developed and evaluated the preclinical pharmacology and safety of a new F(ab')₂ antitoxin against botulinum neurotoxin serotype A (BoNT/A). As an alter...

journal_title：Biochimie

authors： Yu YZ,Zhang SM,Wang WB,Du Y,Zhu HQ,Wang RL,Zhou XW,Lin JB,Wang S,Yu WY,Huang PT,Sun ZW

更新日期：2010-10-01 00:00:00

abstract：:Long non-coding RNAs constitute the most abundant part of the transcribed mammalian genome. lncRNAs affect all essential processes in the living cell including transcription, splicing, translation, replication, shaping of chromatin and post translational modification of proteins. Alterations in lncRNA expression have ...

journal_title：Biochimie

authors： Smekalova EM,Kotelevtsev YV,Leboeuf D,Shcherbinina EY,Fefilova AS,Zatsepin TS,Koteliansky V

更新日期：2016-12-01 00:00:00

abstract：UNLABELLED:Pancreatic cancer (PC) is one of the most lethal human malignancies and a major health problem. Patients diagnosed with PC and treated with conventional approaches have an overall 5-year survival rate of less than 5%. Novel strategies are needed to treat this disease. Herein, we propose a combinatorial strat...

journal_title：Biochimie

authors： Breton CS,Aubry D,Ginet V,Puyal J,Heulot M,Widmann C,Duchosal MA,Nahimana A

更新日期：2015-09-01 00:00:00

abstract：:Investigations have been carried out on the influence of the phospholipid composition and the physicochemical properties of rat liver plasma membranes on the endogenous activity of membrane-bound phospholipase A2. The membrane phospholipid composition was modified by the incorporation of different phospholipids in the...

journal_title：Biochimie

authors： Petkova DH,Momchilova-Pankova AB,Koumanov KS

更新日期：1987-11-01 00:00:00

abstract：:Polysialylated neural cell adhesion molecule (NCAM) was immunoaffinity-purified from the brains of newborn calves. A degree of polymerization of up to 40 was chromatographically determined for released polysialic acid (PSA) chains. For characterization of N-glycan structures and attachment sites, PSA-NCAM was digested...

journal_title：Biochimie

authors： Wuhrer M,Geyer H,von der Ohe M,Gerardy-Schahn R,Schachner M,Geyer R

更新日期：2003-01-01 00:00:00

abstract：:The synthesis of holocytochromes in plastids is a catalyzed process. Several proteins, including plastid CcsA, Ccs1, possibly CcdA and a thioredoxin, plus at least two additional Ccs factors, are required in sub-stoichiometric amounts for the conversion of apocytochromes f and c(6) to their respective holoforms. CcsA,...

journal_title：Biochimie

authors： Nakamoto SS,Hamel P,Merchant S

更新日期：2000-06-01 00:00:00

abstract：:Pseudouridine [Ψ] is a frequent base modification in the ribosomal RNA [rRNA] and may be involved in the modulation of the conformational flexibility of rRNA helix-loop structures during protein synthesis. Helix 69 of 23S rRNA contains pseudouridines at the positions 1911, 1915 and 1917 which are formed by the helix 6...

journal_title：Biochimie

authors： Kipper K,Sild S,Hetényi C,Remme J,Liiv A

更新日期：2011-05-01 00:00:00

abstract：:Glutaredoxins (Grxs), redox-active proteins with a typical -CPYC motif at their active sites, are involved in redox-regulatory processes and antioxidant defenses. The human malarial parasite Plasmodium falciparum possess a classical glutaredoxin (PfGrx) as well as a number of Grx-like proteins. In the present study, w...

journal_title：Biochimie

authors： Tripathi T,Röseler A,Rahlfs S,Becker K,Bhakuni V

更新日期：2010-03-01 00:00:00

abstract：:Peptidase family S46 consists of two types of dipeptidyl-peptidases (DPPs), DPP7 and DPP11, which liberate dipeptides from the N-termini of polypeptides along with the penultimate hydrophobic and acidic residues, respectively. Their specificities are primarily defined by a single amino acid residue, Gly673 in DPP7 and...

journal_title：Biochimie

authors： Nemoto TK,Bezerra GA,Ono T,Nishimata H,Fujiwara T,Ohara-Nemoto Y

更新日期：2018-04-01 00:00:00

abstract：:Toyocamycin (TMC), an adenosine analog has been previously reported to inhibit both number and infectivity of retrovirus particles released by chronically infected cells (Bonar et al., 1970; Riman, 1971; Mauchauffé et al., 1979). We have previously shown that loss of infectivity could result from the incorporation of ...

journal_title：Biochimie

authors： Mathieu-Mahul D,Barque JP,Mauchauffe M,Peraudeau L,Larsen CJ

更新日期：1981-01-01 00:00:00

abstract：:Conformational flexibility and structural fluctuations play an important role in enzyme activity. A great variety of internal motions ranging over different time scales and of different amplitudes are involved in the catalytic cycle. These different types of motions and their functional consequences are considered in ...

journal_title：Biochimie

authors： Yon JM,Perahia D,Ghélis C

更新日期：1998-01-01 00:00:00

abstract：:The interactions of DNA with histone H4 and with its fragments N-H4 (1-84) and C-H4 (85-102) have been studied by using electrooptical techniques, viscosity and electron microscopy. Electron microscopy reveals that histone H4 induces a large folding of DNA molecules : this is in agreement with electrooptical measureme...

journal_title：Biochimie

authors： Palau AO,Mozo A,Querol E

更新日期：1980-01-01 00:00:00

abstract：:Interferons-alpha (IFN-alpha) are pleiotropic cytokines belonging to type I IFNs, extensively used in the treatment of patients with some types of cancer and viral disease. IFN-alpha can affect tumor cell functions by multiple mechanisms. In addition, these cytokines can promote the differentiation and activity of hos...

journal_title：Biochimie

authors： Ferrantini M,Capone I,Belardelli F

更新日期：2007-06-01 00:00:00

abstract：:Kinetic parameters characterizing the catalytic activities of enzymes are typically investigated in dilute solutions. However, in reality, these reactions occur in cells that, in addition to water and ions, are full of other macromolecules including proteins, nucleic acids, lipids, and metabolites. Such a crowded envi...

journal_title：Biochimie

authors： Popielec A,Ostrowska N,Wojciechowska M,Feig M,Trylska J

更新日期：2020-09-01 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

abstract：:The regulation of transcription of the pckA gene coding for phosphoenolpyruvate carboxykinase in Escherichia coli was analysed by site-directed mutagenesis of the promoter region and measurement of in vitro transcription initiation. Mutation of the guanine residue at position -14 to either cytosine or thymine was foun...

journal_title：Biochimie

authors： Prost JF,Cozzone AJ

更新日期：1999-03-01 00:00:00

abstract：:EPR spectroscopy in conjunction with oxidation-reduction potentiometry has been used to determine the half-reduction potentials of the four hemes of cytochrome c3. As predicted, the four hemes of cytochrome c3 have different mid-point potentials. The Em values are: Heme I,--284 mV; Heme II,--310 mV; Heme III,--324 mV ...

journal_title：Biochimie

authors： Dervartanian DV,Xavier AV,Gall JL

更新日期：1978-01-01 00:00:00

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：:Directed mutagenesis has been used to study the nicotinamide subsite of the glycolytic NAD-dependent glyceraldehyde-3-phosphate dehydrogenase (GAPDH). Residue Asn313 is involved together with the carboxyamide moiety of the nicotinamide ring in a complex network of hydrogen bonding interactions which fix the position o...

journal_title：Biochimie

authors： Corbier C,Mougin A,Mely Y,Adolph HW,Zeppezauer M,Gerard D,Wonacott A,Branlant G

更新日期：1990-08-01 00:00:00

abstract：BACKGROUND:The modest efficacy of available therapies for Hepatocellular carcinoma (HCC) indicates the need to develop novel therapeutic approaches. For the proteasome inhibitor Bortezomib (BZB), potentially attractive for HCC treatment, the mechanism of action is largely unknown. The BZB effect on E2Fs and the E2Fs co...

journal_title：Biochimie

authors： Farra R,Dapas B,Baiz D,Tonon F,Chiaretti S,Del Sal G,Rustighi A,Elvassore N,Pozzato G,Grassi M,Grassi G

更新日期：2015-05-01 00:00:00

abstract：:The Escherichia coli low molecular mass penicillin-binding proteins (PBP4, PBP5 and PBP6) are a group of penicillin-sensitive enzymes involved in the final stages of cell wall assembly. It has been suggested that these proteins may interact with the periplasmic face of the inner membrane via C-terminal amphiphilic alp...

journal_title：Biochimie

authors： Harris F,Phoenix DA

更新日期：1997-04-01 00:00:00

abstract：:Leptin is a cytokine secreted by the adipose tissue that is involved in the control of body weight. We previously showed that a point mutation (R105W) in leptin results in leptin deficiency, marked obesity and hypogonadism in humans adults. Expression in COS1 cells showed impaired secretion and intracellular accumulat...

journal_title：Biochimie

authors： Boute N,Zilberfarb V,Camoin L,Bonnafous S,Le Marchand-Brustel Y,Issad T

更新日期：2004-06-01 00:00:00

abstract：:Flavodoxins are one domain alpha/beta electron transfer proteins that participate in photosynthetic reactions. All flavodoxins carry a molecule of flavin mononucleotide (FMN), non-covalently bound, that confers redox properties to the protein. There are two structurally distinct flavodoxins, short ones and long flavod...

journal_title：Biochimie

authors： Maldonado S,Lostao A,Irún MP,Férnandez-Recio J,Gustavo Genzor C,Begoña González E,Rubio JA,Luquita A,Daoudi F,Sancho J

更新日期：1998-10-01 00:00:00

abstract：:Influenza virus-associated RNA polymerase is composed of one molecule each of three viral P proteins and carries the complete activity of capped RNA-primed vRNA-directed transcription. The RNA polymerase holoenzyme also carries capped RNA endonuclease to generate capped oligonucleotide primers for transcription and 3'...

journal_title：Biochimie

authors： Ishihama A

更新日期：1996-01-01 00:00:00

abstract：:The field of immunometabolism has come a long way in the past decade, leading to the emergence of a new role for white adipose tissue (WAT) that is now recognized to stand at the junction of immune and metabolic regulations. Interestingly, a crucial role of the abundant and heterogeneous immune population present in W...

journal_title：Biochimie

authors： Cousin B,Casteilla L,Laharrague P,Luche E,Lorsignol A,Cuminetti V,Paupert J

更新日期：2016-05-01 00:00:00

abstract：:Classic studies suggested that the common mammalian sialic acid N-glycolylneuraminic acid (Neu5Gc) is an oncofetal antigen in humans, being immunogenic in adult humans and yet apparently expressed in human fetuses and tumors. We and others have recently found that the human deficiency of Neu5Gc can be explained by an ...

journal_title：Biochimie

authors： Varki A

更新日期：2001-07-01 00:00:00

abstract：:Strains of Escherichia, Salmonella, Shigella and Yersinia actively enter eukaryotic cells. Several techniques were used to compare and contrast the invasion mechanisms of Salmonella cholerae-suis, Yersinia enterocolitica and Shigella flexneri. Three animal cell lines (CHO, HEp-2 and MDCK) were examined for susceptibil...

journal_title：Biochimie

authors： Finlay BB,Falkow S

更新日期：1988-08-01 00:00:00