Objectif The aim of this project is to elucidate some of the molecular mechanisms that underlie the early definition of dorso-ventral axis in vertebrates, using Xenopus as a model system. The Nieuwkoop Center (NC), located in the dorsal-vegetal cells of blastulae, constitutes the first organizing center during embryogenesis and it is defined by the relocation of maternal of dorsal determinants. It acts by inducing Spemann's organizer in the overlying mesodermal cells. In spite of its central role in dorso-ventral axis formation, the mechanisms involved in the definition of the NC are unclear. This project proposes to tackle this issue by studying the spatial regulation of Siamois, a homebox gene expressed in the NC. After cloning the genomic sequences of Siamois, we will define the cis regulatory elements present that are important for its spatial expression. Once determined, it will be possible to purify the maternal determinants that bind these sequences. Champ scientifique natural sciencesbiological sciencesdevelopmental biology Programme(s) FP4-TMR - Specific research and technological development programme in the field of the training and mobility of researchers, 1994-1998 Thème(s) 0302 - Post-doctoral research training grants TL06 - Developmental Biology Appel à propositions Data not available Régime de financement RGI - Research grants (individual fellowships) Coordinateur Centre National de la Recherche Scientifique Contribution de l’UE Aucune donnée Adresse Campus de Luminy 13288 Marseille France Voir sur la carte Coût total Aucune donnée Participants (1) Trier par ordre alphabétique Trier par contribution de l’UE Tout développer Tout réduire Not available Espagne Contribution de l’UE Aucune donnée Adresse Voir sur la carte Coût total Aucune donnée