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Academic literature on the topic 'Protéine de liaison à C4b'
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Journal articles on the topic "Protéine de liaison à C4b"
Mercier-Bodard, Christine. "Synthèse et régulation de la protéine de liaison des androgènes chez l’homme." Andrologie 3, no. 1 (December 1993): 9–15. http://dx.doi.org/10.1007/bf03034603.
Full textHENRY, Y. "Affinement du concept de la protéine idéale pour le porc en croissance." INRAE Productions Animales 6, no. 3 (June 28, 1993): 199–212. http://dx.doi.org/10.20870/productions-animales.1993.6.3.4200.
Full textAtadja, Peter W., and Karl T. Riabowol. "Loss of Serum Response Factor Activity Is the Basis of Reduced C-FOS Expression in Aging Human Fibroblasts." Canadian Journal on Aging / La Revue canadienne du vieillissement 15, no. 1 (1996): 31–43. http://dx.doi.org/10.1017/s071498080001326x.
Full textEpelbaum, Jacques. "Une liaison intraneuronale de peptide β-amyloïde et de protéine Tau solubles pour résoudre la question insoluble de la cause première de la maladie d’Alzheimer." médecine/sciences 22, no. 5 (May 2006): 462–63. http://dx.doi.org/10.1051/medsci/2006225462.
Full textHarrison, Robyn, Robert Stirling, Oliver Baclic, and Wendy Vaudry. "Résumé de la déclaration du CCNI sur l’utilisation du vaccin bivalent dirigé contre la protéine de liaison au facteur H (MenB-fHBP) pour la prévention de l’infection à méningocoque du sérogroupe B." Relevé des maladies transmissibles au Canada, February 6, 2020, 40–44. http://dx.doi.org/10.14745/ccdr.v46i23a03f.
Full textDissertations / Theses on the topic "Protéine de liaison à C4b"
Mahmoud, Wael. "Déviation de la réponse immune à visée d'immuno-intervention à l'aide de proteines recombinantes hétérofonctionnelles." Reims, 2008. http://theses.univ-reims.fr/exl-doc/GED00001024.pdf.
Full textReyt, Françoise. "Influence de la température sur la liaison calcium-protéine." Bordeaux 2, 1997. http://www.theses.fr/1997BOR2P017.
Full textGuigou, Ludovic. "L'arginyl-ARNt synthétase de mammifère : rôle des interactions protéine-protéine et protéine-ARN sur son activité." Paris 11, 2005. http://www.theses.fr/2005PA112141.
Full textEach aminoacyl-tRNA synthetase catalyze the esterification of its cognate amino acid to the 3'-end of its cognate tRNA(s). Some aminoacyl-tRNA synthetases (aaRSs) catalyze the amino acid activation step only in the presence of a cognate tRNA. This behaviour has been studied in Arginyl-tRNA synthetase (ArgRS) from hamster. Our results show that three contact points with the tRNA molecule are important in the activation step : bases A76, A20 and C35. These three bases must be presented by a tRNA possessing both rigidity (intact " L " shape) and flexibility (provided by G-U base-pairs). We conclude that the triggering of the activation step in ArgRS implies an induced-fit mechanism. Enzymes from the multi-aaRSs complex found in higher eukaryotes display additional basic domains, some of them interacting with tRNAs. We show that these domains increase the affinity of the enzymes of the complex for their specific tRNAs only. Thus, the catalytic body of each enzyme determines its specificity, while the additionnal basic domains increase the affinity of the enzymes for their specific tRNA(s). The p43 protein, a component of the complex able to interact with tRNAs and ArgRS, does not affect the catalytic parameters of this enzyme. Crystals of a short form of the p43 protein have been obtained and the structure has been solved by molecular replacement, but the N-terminal residues, that are responsible for the interaction with tRNAs, are not visible. Conditions for the isolation of the multi-aaRSs complex have been refined in order to carry out a structural study using cryo-electron microscopy and crystallography
Leroux, Clémentine. "Etude de la protéine de liaison à l’ARN LIF2, partenaire de la protéine chromatinienne LHP1, chez Arabidopsis thaliana." Thesis, Paris 11, 2013. http://www.theses.fr/2013PA112013.
Full textChromatin dynamics play a central role in developmental control, cell differentiation or responses of the organisms to environment. In animals, Polycomb group proteins are involved in the establishment of silent chromatin states. In plants, recent data suggest that LIKE HETEROCHROMATIN PROTEIN 1 (LHP1) participates to a Polycomb-like complex. We focused on LHP1 complexes by studying one of its partners, LHP1 INTERACTING FACTOR 2 (LIF2). The aim of this thesis was to pursue the characterization of LIF2. LIF2 is composed of RNA-binding domains, suggesting the participation of an RNA component in LHP1 complexes. We have searched for LIF2 RNA-ligands and studied LIF2/RNA interactions with different approaches including Biacore technology. By analyzing the transcriptome profile of lif2, we have noticed an enrichment for genes involved in responses to abiotic and biotic stresses stimuli. We investigated the LIF2 functions in response to pathogens infection and we have been able to highlight that LIF2 plays a role in plant innate immunity and is essential to negatively regulate defense responses in the absence of pathogens
Boulanger, Gaëlla. "Rôles de la protéine de liaison aux ARN, CELF1, dans les fonctions testiculaires." Rennes 1, 2012. http://www.theses.fr/2012REN1S057.
Full textCELF1 is an ubiquitous and multifunctional RNA-binding protein, involved in the epost-transcriptional regulations of the genetic expression. Male mice that are inactivated for the Celf1 gene (Celf1⁻/⁻) display a hypofertility associated with defects of the spermiogenesis, the elongation of post-meiotic cells. We show here that these defects appear from the first wave of the spermatogenesis in the prepubescent animal, and are associated to a delay of the development of Celf1⁻/⁻ mice. At the adult, males present a decreased testosterone level. The elongation of the round spermatid being strongly dependent on the testosterone, we supposed that the defects of spermiogenesis are due to this hypotestosteronemia. We validated this hypothesis by a supplementation in testosterone of Celf1⁻/⁻ mice. We showed that the decreased testosterone level of Celf1⁻/⁻ mice is associated with an overexpression of the Cyp19al gene, encoding for the aromatase, an enzyme that converted androgens into estrogens. CELF1 interacts in vivo with the Cypl19al mRNA. These data indicate that CELF1 represses the expression of the aromatase by destabilizing its mRNA to the wild-type mice, and that the hypotestosteronemia in Celf1⁻/⁻ mice is due at least in part to a loss of this repression. The aromatase being strongly expressed in the Leydig cells, we supposed that this deregulation takes place mainly in these cells. We thus generated a conditional inactivation of Celf1⁻/⁻ in the Leydig cells to confirm it
Pesenti, Marion. "Etudes fonctionnelles et structurales d'ASP1, une protéine de liaison des phéromones chez l'abeille." Aix-Marseille 1, 2009. http://theses.univ-amu.fr.lama.univ-amu.fr/2009AIX11003.pdf.
Full textIn honey bee (Apis mellifera) societies, the queen controls the development and the caste status of the hive members. The queen bee secretes a pheromonal blends comprising ten or more components, mainly hydrophobic. These components act on the workers and male, eliciting a large range of social or sexual responses. Some of them are captured in the antennal lymph and transported to the receptor by the means of pheromone binding proteins (PBP), and elicit, after a cascade of molecular events, signal transduction at the axon membrane level. We have determined the structures of the main antennal PBP identified in workers and male honey bees (ASP1) without ligand, in complex with the main component of the queen mandibular blend, and with non pheromonal components at different pH. At acidic pH, the structure is a monomer, where the binding site integrity depends on the C-terminus conformation and the interplay of two factors: the ligand and pH. Contrary to the ASP1 structure at low pH, ASP1 structure crystallized at pH 7. 0 is a domainswapped dimer with one or two ligands per monomer. This dimerization depends on the nature of a unique residue, Asp 35, since Asn or Ala mutants remain monomeric at pH 7. 0, as does native ASP1 at pH 4. 0. Asp35, however, is conserved in only ~30% of medium chains PBPs, and is replaced by other residues such as Asn, Ala or Ser (and others), excluding thus that they may perform domain swapping. Therefore, these different medium-chains PBPs, as well as PBPs from moths, very likely exhibit different mechanisms of ligand release and receptor recognition
David, Marie-Hélène. "Etude du domaine de liaison à l'ADN de la protéine c-ABL humaine." Lille 1, 1998. https://pepite-depot.univ-lille.fr/LIBRE/Th_Num/1998/50376-1998-319.pdf.
Full textL'element ep present au sein de l'enhancer du virus de l'hepatite b avait ete identifie comme etant cette sequence cible. Nous avons tout d'abord montre que la sequence consensus de liaison a l'adn de c-abl ne correspondait pas a l'element ep, mais que celui-ci etait par contre reconnu par la proteine c-myb. De plus, la proteine c-myb active la transcription a partir de l'enhancer hbv par fixation sur ep et en cooperation avec la proteine nf-m interagissant sur l'element e de l'enhancer hbv. Nous avons montre que la proteine c-abl reconnaissait la sequence consensus a#a/#caacaa#a/#c mais aussi des structures tordues de l'adn a la maniere des proteines de la famille hmg. Toutefois, le domaine de liaison a l'adn de c-abl n'est pas capable de tordre sa sequence cible, contrairement aux proteines hmg, mais semble etre capable de separer les deux brins de la double helice. Ces differentes proprietes suggerent un role du domaine de liaison a l'adn de la proteine c-abl dans les mecanismes impliquant la formation de structure de l'adn, tels que la reparation et la replication de l'adn, ainsi que dans la transcription
Fraser, Benoit. "Liaison de la protéine spermatique bovine Spam-1 à la zone pellucide de l'ovule." Thesis, Université Laval, 2013. http://www.theses.ulaval.ca/2013/28675/28675.pdf.
Full textSpam-1 is a sperm surface protein that would help the spermatozoa going through the cumulus, disrupting the hyaluronan around the egg. It would also have a role to play in the secondary binding of the spermatozoa to the zona pellucida of the oocyte. The aim of the present study, by the construction of various fluorescent recombinant proteins containing the sequences of the different domains of Spam-1, is to clearly demonstrate that bovine spermatic Spam-1 protein is directly implicated in the secondary binding of the spermatozoa to the zona pellucida and to show that the C-terminal domain is implicated. The results of this study are going to determine the importance of Spam-1 in the spermatozoa binding to the zona pellucida and in getting a better understanding of the mechanisms surrounding the interactions between spermatozoa and oocyte.
Drapeau, Karine. "Caractérisation biochimique et cellulaire de la protéine FANCD2, une protéine mutée dans l'anémie de fanconi." Thesis, Université Laval, 2012. http://www.theses.ulaval.ca/2012/29163/29163.pdf.
Full textGiraud, Pierre. "Caractérisation des méthodes de liaison de la protéine ribosomique S à la sous-unité 30S du ribosome d'Escherichia coli par Résonance Magnétique Nucléaire." Paris 6, 2010. http://www.theses.fr/2010PA066128.
Full textBooks on the topic "Protéine de liaison à C4b"
Marialuisa, Melli, and Parente Luca, eds. Cytokines and lipocortins in inflammation and differentiation: Proceedings of the International Conference on Molecular and Cellular Biology of IL-1, TNF, and Lipocortins in Inflammation and Differentiation, held in Siena, Italy, October 22-25, 1989. New York, NY: Wiley-Liss, 1990.
Find full text(Editor), Marialuisa Melli, and Luca Parente (Editor), eds. Cytokines and Lipocortins in Inflammation and Differentiation: Proceedings of the International Conference on Molecular and Cellular Biology of Il-1, (Progress in Clinical & Biological Research). Wiley-Liss, 1990.
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