Objetivo Chromatin structure is influenced by covalent modifications of histones which lead to the recruitment of proteins that recognize specific regions in the genome. Histones undergo a variety of post-translational modifications. These modifications modulate a multitude of DNA based processes such as transcription, repair, replication and chromatin dynamics. Methylation is one of these important modifications. In this proposal the histone methyltransferase Dot1 (disruptor of telomeric silencing) is investigated. Dot1 methylates lysine 79 located in the globular histone-fold of histone H3 and is therefore the first histone modification enzyme discovered that modifies a residue in the core region and not in the N-terminal part. This methylation requires minimally a nucleosome core particle (NCP), consisting of 147bp of DNA and a histone octamer containing a central H3-H4 tetramer and two H2A-H2B dimers. The ability of Dot1 to bind and modify a nucleosomal substrate makes it an ideal model enzyme to study the interaction of the nucleosome with such regulatory factors. In this approach x-ray crystallography combined with disulphide crosslinking will be used to study the Dot1/NCP interaction. Heterochromatic gene silencing, DNA repair, embryonic development and human leukemia are only some of the processes Dot1 is involved in and they also contribute greatly to its interest. As part of leukemia pathogenesis Dot1 was shown to interact with the MLL (mixed lineage leukemia) fusion protein AF10, Dot1 therefore plays a significant role in misregulation of MLL oncogenes. The structural information obtained by x-ray crystallography about the Dot1/AF10 interaction will give insights into leukemia pathogenesis whereas structural studies of the Dot1/chromatin interaction would be a major step to understand the interaction between chromatin and chromatin associated factors and would therefore be a milestone in chromatin biology. Ámbito científico natural sciencesbiological sciencesgeneticsDNAnatural sciencesearth and related environmental sciencesgeologymineralogycrystallographynatural sciencesbiological sciencesdevelopmental biologymedical and health sciencesclinical medicineoncologyleukemianatural sciencesbiological sciencesbiochemistrybiomoleculesproteinsenzymes Programa(s) FP7-PEOPLE - Specific programme "People" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013) Tema(s) FP7-PEOPLE-2012-IEF - Marie-Curie Action: "Intra-European fellowships for career development" Convocatoria de propuestas FP7-PEOPLE-2012-IEF Consulte otros proyectos de esta convocatoria Régimen de financiación MC-IEF - Intra-European Fellowships (IEF) Coordinador EIDGENOESSISCHE TECHNISCHE HOCHSCHULE ZUERICH Aportación de la UE € 184 709,40 Dirección Raemistrasse 101 8092 Zuerich Suiza Ver en el mapa Región Schweiz/Suisse/Svizzera Zürich Zürich Tipo de actividad Higher or Secondary Education Establishments Contacto administrativo Rudi Glockshuber (Prof.) Enlaces Contactar con la organización Opens in new window Sitio web Opens in new window Coste total Sin datos
